forked from enlightenment/efl
1303 lines
47 KiB
Plaintext
1303 lines
47 KiB
Plaintext
/**
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* @page Examples Examples
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*
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* Here is a page with Elementary examples.
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*
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* @ref bg_01_example_page
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*
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* @ref bg_02_example_page
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*
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* @ref bg_03_example_page
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*
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* @ref actionslider_example_page
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*
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* @ref elm_animator_example_page_01
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*
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* @ref transit_example_01_explained
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*
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* @ref transit_example_02_explained
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*
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* @ref general_functions_example_page
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*
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* @ref clock_example
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*
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* @ref flipselector_example
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*/
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/**
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* @page bg_01_example_page elm_bg - Plain color background.
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* @dontinclude bg_example_01.c
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*
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* The full code for this example can be found at @ref bg_example_01_c,
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* in the function @c test_bg_plain. It's part of the @c elementar_test
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* suite, and thus has the code for the three examples referenced by this
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* documentation.
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*
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* This first example just sets a default background with a plain color. The
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* first part consists of creating an Elementary window. It's the common
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* piece of code that you'll see everywhere in Elementary: @skip elm_main
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* @until autodel_set
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*
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* Now we really create our background object, using the window object as
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* its parent:
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*
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* @skipline bg_add
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*
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* Then we set the size hints of the background object so that it will use
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* all space available for it, and then add it as a resize object to the
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* window, making it visible in the end:
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*
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* @skip size_hint_weight_set
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* @until resize_object_add
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*
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* See @ref evas_object_size_hint_weight_set and elm_win_resize_object_add()
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* for more detailed info about these functions.
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*
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* The end of the example is quite simple, just setting the minimum and
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* maximum size of the background, so the Elementary window knows that it
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* has to have at least the minimum size. The background also won't scale to
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* a size above its maximum. Then we resize the window and show it in the
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* end:
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*
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* @skip set size hints
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* @until }
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*
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* And here we finish our very simple background object usage example.
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*/
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/**
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* @page bg_02_example_page elm_bg - Image background.
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* @dontinclude bg_example_02.c
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*
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* The full code for this example can be found at @ref bg_example_02_c,
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* in the function @c test_bg_image. It's part of the @c elementar_test
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* suite, and thus has the code for the three examples referenced by this
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* documentation.
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*
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* This is the second example, and shows how to use the Elementary
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* background object to set an image as background of your application.
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*
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* We start this example exactly in the same way as the previous one, even
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* when creating the background object:
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*
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* @skip elm_main
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* @until bg_add
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*
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* Now it's the different part.
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*
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* Our background will have an image, that will be displayed over the
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* background color. Before loading the image, we set the load size of the
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* image. The load size is a hint about the size that we want the image
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* displayed in the screen. It's not the exact size that the image will have,
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* but usually a bit bigger. The background object can still be scaled to a
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* size bigger than the one set here. Setting the image load size to
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* something smaller than its real size will reduce the memory used to keep
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* the pixmap representation of the image, and the time to load it. Here we
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* set the load size to 20x20 pixels, but the image is loaded with a size
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* bigger than that (since it's just a hint):
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*
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* @skipline load_size_set
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*
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* And set our background image to be centered, instead of stretched or
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* scaled, so the effect of the elm_bg_load_size_set() can be easily
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* understood:
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*
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* @skipline option_set
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*
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* We need a filename to set, so we get one from the previous installed
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* images in the @c PACKAGE_DATA_DIR, and write its full path to a buffer.
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* Then we use this buffer to set the filename in the background object:
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*
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* @skip snprintf
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* @until bg_file_set
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*
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* Notice that the third argument of the elm_bg_file_set() function is @c
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* NULL, since we are setting an image to this background. This function
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* also supports setting an edje group as background, in which case the @c
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* group parameter wouldn't be @c NULL, but be the name of the group
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* instead.
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*
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* Finally, we can set the size hints, add the background as a resize
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* object, and resize the window, exactly the same thing we do in the @ref
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* bg_01_example_page example:
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*
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* @skip size_hint
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* @until }
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*
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* And this is the end of this example.
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*
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* This example will look like this:
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* @image html screenshots/bg_01.png
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* @image latex screenshots/bg_01.eps
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*/
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/**
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* @page bg_03_example_page elm_bg - Background properties.
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* @dontinclude bg_example_03.c
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*
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* The full code for this example can be found at @ref bg_example_03_c, in the
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* function @c test_bg_options, with the callbacks @c _cb_overlay_changed, @c
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* _cb_color_changed and @c _cb_radio_changed defined in the beginning of the
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* file. It's part of the @c elementar_test suite, and thus has the code for
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* the three examples referenced by this documentation.
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*
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* This example will show the properties available for the background object,
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* and will use of some more widgets to set them.
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*
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* In order to do this, we will set some callbacks for these widgets. The
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* first is for the radio buttons that will be used to choose the option
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* passed as argument to elm_bg_option_set():
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*
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* @skip _cb_radio_changed
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* @until }
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*
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* The next callback will be used when setting the overlay (using
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* elm_bg_overlay_set()):
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*
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* @skip _cb_overlay_changed
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* @until }
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* @until }
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*
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* And the last one, used to set the color (with elm_bg_color_set()):
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*
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* @skip _cb_color_changed
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* @until }
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*
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* We will get back to what these functions do soon. If you want to know more
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* about how to set these callbacks and what these widgets are, look for:
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* @li elm_radio_add()
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* @li elm_check_add()
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* @li elm_spinner_add()
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*
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* Now going to the main function, @c test_bg_options, we have the common
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* code with the other examples:
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*
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* @skip bg-options
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* @until autodel_set
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*
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* We add a plain background to this window, so it will have the default
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* background color behind everything:
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*
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* @skip bg = elm_bg_add
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* @until evas_object_show(bg)
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*
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* Then we add a vertical box (elm_box_add()) that will hold the background
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* object that we are going to play with, as well as a horizontal box that
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* will hold widgets:
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*
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* @skip elm_box_add
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* @until evas_object_show
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*
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* Now we add the background object that is going to be of use for our
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* example. It is an image background, as used in @ref bg_02_example_page ,
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* so the code should be familiar:
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*
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* @skip elm_bg_add
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* @until evas_object_show
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*
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* Notice the call to elm_box_pack_end(): it will pack the background object
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* in the end of the Elementary box declared above. Just refer to that
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* documentation for more info.
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*
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* Since this Elementary background is already an image background, we are
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* going to play with its other properties. We will change its option
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* (CENTER, SCALE, STRETCH, TILE), its color (RGB), and add an overlay to it.
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* For all of these properties, we are going to add widgets that will
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* configure them.
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*
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* First, lets add the horizontal box that will hold these widgets:
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* @skip hbox
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* @until align_set
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*
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* For now, just consider this @c hbox as a rectangle that will contain the
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* widgets, and will distribute them horizontally inside its content. Then we
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* add radio buttons that will allow us to choose the property to use with
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* this background:
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*
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* @skip radio_add
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* @until evas_object_show
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*
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* Again, I won't give details about the use of these widgets, just look for
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* their documentation if necessary. It's enough to know for now that we are
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* packing them in the @c hbox, setting a label for them, and the most
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* important parts: setting its value to @c ELM_BG_OPTION_CENTER and its
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* callback to @c _cb_radio_changed (the function defined in the beginning of
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* this example). We do this for the next 3 radio buttons added after this
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* one, each of them with a different value.
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*
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* Now taking a look at the code of the callback @c _cb_radio_changed again,
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* it will call elm_bg_option_set() with the value set from the checked radio
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* button, thus setting the option for this background. The background is
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* passed as argument to the @p data parameter of this callback, and is
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* referenced here as @c o_bg.
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*
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* Later we set the default value for this radio button:
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*
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* @skipline elm_radio_value_set
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*
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* Then we add a checkbox for the elm_bg_overlay_set() function:
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*
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* @skip check_add
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* @until evas_object_show
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*
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* Now look at the code of the @c _cb_overlay_changed again. If the checkbox
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* state is checked, an overlay will be added to the background. It's done by
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* creating an Edje object, and setting it with elm_bg_overlay_set() to the
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* background object. For information about what are and how to set Edje
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* object, look at the Edje documentation.
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*
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* Finally we add a spinner object (elm_spinner_add()) to be used to select
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* the color of our background. In its callback it's possible to see the call
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* to elm_bg_color_set(), which will change the color of this background.
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* This color is used by the background to fill areas where the image doesn't
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* cover (in this case, where we have an image background). The spinner is
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* also packed into the @c hbox :
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*
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* @skip elm_spinner_add
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* @until evas_object_show
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*
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* Then we just have to pack the @c hbox inside the @c box, set some size
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* hints, and show our window:
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*
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* @skip pack_end
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* @until }
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*
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* Now to see this code in action, open elementary_test, and go to the "Bg
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* Options" test. It should demonstrate what was implemented here.
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*/
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/**
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* @page actionslider_example_page Actionslider usage
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* @dontinclude actionslider_example_01.c
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*
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* For this example we are going to assume knowledge of evas smart callbacks
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* and some basic evas object functions. Elementary is not meant to be used
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* without evas, if you're not yet familiar with evas it probably is worth
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* checking that out.
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*
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* And now to the example, when using Elementary we start by including
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* Elementary.h:
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* @skipline #include
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*
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* Next we define some callbacks, they all share the same signature because
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* they are all to be used with evas_object_smart_callback_add().
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* The first one just prints the selected label(in two different ways):
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* @until }
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*
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* This next callback is a little more interesting, it makes the selected
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* label magnetic(except if it's the center label):
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* @until }
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*
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* This callback enables or disables the magnetic propertty of the center
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* label:
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* @until }
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*
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* And finally a callback to stop the main loop when the window is closed:
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* @until }
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*
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* To be able to create our actionsliders we need to do some setup, but this
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* isn't really relevant here, so if you want to know about that go @ref
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* Win "here".
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*
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* With all that boring stuff out of the way we can proceed to creating some
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* actionsliders.@n
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* All actionsliders are created the same way:
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* @skipline actionslider_add
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* Next we must choose where the indicator starts, and for this one we choose
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* the right, and set the right as magnetic:
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* @skipline indicator_pos_set
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* @until magnet_pos_set
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*
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* We then set the labels for the left and right, passing NULL as an argument
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* to any of the labels makes that position have no label.
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* @until Stop
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*
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* Furthermore we mark both left and right as enabled positions, if we didn't
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* do this all three positions would be enabled:
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* @until RIGHT
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*
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* Having the the enabled positions we now add a smart callback to change
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* which position is magnetic, so that only the last selected position is
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* magnetic:
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* @until NULL
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*
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* And finally we set our printing callback and show the actionslider:
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* @until object_show
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* @skip pack_end
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*
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* For our next actionslider we are going to do much as we did for the
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* previous except we are going to have the center as the magnet(and not
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* change it):
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* @skipline actionslider_add
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* @skipline indicator_pos_set
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* @until object_show
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*
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* And another actionslider, in this one the indicator starts on the left.
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* It has labels only in the center and right, and both bositions are
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* magnetic. Because the left doesn't have a label and is not magnetic once
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* the indicator leaves it can't return:
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* @skipline actionslider_add
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* @skipline indicator_pos_set
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* @until object_show
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* @note The greyed out area is a @ref Styles "style".
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*
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* And now an actionslider with a label in the indicator, and whose magnet
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* properties change based on what was last selected:
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* @skipline actionslider_add
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* @skipline indicator_pos_set
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* @until object_show
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* @note The greyed out area is a @ref Styles "style".
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*
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* We are almost done, this next one is just an actionslider with all
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* positions magnetized and having every possible label:
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* @skipline actionslider_add
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* @skipline indicator_pos_set
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* @until object_show
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*
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* And for our last actionslider we have one that turns the magnetic property
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* on and off:
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* @skipline actionslider_add
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* @skipline indicator_pos_set
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* @until object_show
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*
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* The example will look like this:
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* @image html screenshots/actionslider_01.png
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* @image latex screenshots/actionslider_01.eps
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*
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* See the full source code @ref actionslider_example_01 "here"
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*/
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/**
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* @page elm_animator_example_page_01 Animator usage
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* @dontinclude animator_example_01.c
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*
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* For this example we will be using a bit of evas, you could animate a
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* elementary widget in much the same way, but to keep things simple we use
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* an evas_object_rectangle.
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*
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* As every other example we start with our include and a simple callback to
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* exit the app when the window is closed:
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* @skipline #include
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* @until }
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*
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* This next callback is the one that actually creates our animation, it
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* changes the size, position and color of a rectangle given to it in @a
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* data:
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* @until }
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*
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* Next we have a callback that prints a string, nothing special:
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* @until }
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*
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* This next callback is a little more interesting, it has a state variable
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* to know if the animation is currently paused or running, and it toogles
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* the state of the animation accordingly:
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* @until }
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* @until }
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* @until }
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*
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* Finally we have a callback to stop the animation:
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* @until }
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*
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* As with every example we need to do a bit of setup before we can actually
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* use an animation, but for the purposes of this example that's not relevant
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* so let's just skip to the good stuff, creating an animator:
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* @skipline animator_add
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* @note Since elm_animator is not a widget we can give it a NULL parent.
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*
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* Now that we have an elm_animator we set it's duration to 1 second:
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* @line duration_set
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*
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* We would also like our animation to be reversible, so:
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* @line reverse_set
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*
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* We also set our animation to repeat as many times as possible, which will
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* mean that _end_cb will only be called after UINT_MAX * 2 seconds(UINT_MAX
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* for the animation running forward and UNIT_MAX for the animation running
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* backwards):
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* @line repeat_set
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*
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* To add some fun to our animation we will use the IN_OUT curve style:
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* @line curve_style
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*
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* To actually animate anything we need an operation callback:
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* @line operation_callback
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*
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* Even though we set our animation to repeat for a very long time we are
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* going to set a end callback to it:
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* @line completion_callback
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* @note Notice that stoping the animation with the stop button will not make
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* _end_cb be called.
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*
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* Now that we have fully set up our animator we can tell it to start
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* animating:
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* @line animate
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*
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* There's a bit more of code that doesn't really matter to use so we skip
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* right down to our last interesting point:
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* @skipline animator_del
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* @note Because we created our animator with no parent we need to delete it
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* ourselves.
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*
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* The example should look like this:
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* @image html screenshots/animator_example_01.png
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* @image latex screenshots/animator_example_01.eps
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* @n
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* @image html screenshots/animator_example_02.png
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* @image latex screenshots/animator_example_02.eps
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* @n
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* @image html screenshots/animator_example_03.png
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* @image latex screenshots/animator_example_03.eps
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*
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* The full source code for this example can be found @ref
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* animator_example_01_c "here"
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*/
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/**
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* @page transit_example_03_c elm_transit - Combined effects and options.
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*
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* This example shows how to apply the following transition effects:
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* @li translation
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* @li color
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* @li rotation
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* @li wipe
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* @li zoom
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* @li resizing
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*
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* It allows you to apply more than one effect at once, and also allows to
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* set properties like event_enabled, auto_reverse, repeat_times and
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* tween_mode.
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*
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* @include transit_example_03.c
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*/
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/**
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* @page transit_example_04_c elm_transit - Combined effects over two objects.
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*
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* This example shows how to apply the transition effects:
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* @li flip
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* @li resizable_flip
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* @li fade
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* @li blend
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* over two objects. This kind of transition effect is used to make one
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* object disappear and another one appear on its place.
|
|
*
|
|
* You can mix more than one effect of this type on the same objects, and the
|
|
* transition will apply both.
|
|
*
|
|
* @include transit_example_04.c
|
|
*/
|
|
|
|
/**
|
|
* @page transit_example_01_explained elm_transit - Basic transit usage.
|
|
* @dontinclude transit_example_01.c
|
|
*
|
|
* The full code for this example can be found at @ref transit_example_01_c.
|
|
*
|
|
* This example shows the simplest way of creating a transition and applying
|
|
* it to an object. Similarly to every other elementary example, we create a
|
|
* window, set its title, size, autodel property, and setup a callback to
|
|
* exit the program when finished:
|
|
*
|
|
* @skip on_done
|
|
* @until evas_object_resize
|
|
*
|
|
* We also add a resizeable white background to use behind our animation:
|
|
*
|
|
* @skip bg_add
|
|
* @until evas_object_show
|
|
*
|
|
* And then we add a button that we will use to demonstrate the effects of
|
|
* our animation:
|
|
*
|
|
* @skip button_add
|
|
* @until evas_object_show(win)
|
|
*
|
|
* Notice that we are not adding the button with elm_win_resize_object_add()
|
|
* because we don't want the window to control the size of the button. We
|
|
* will use the transition to change the button size, so it could conflict
|
|
* with something else trying to control that size.
|
|
*
|
|
* Now, the simplest code possible to create the resize animation:
|
|
*
|
|
* @skip transit_add
|
|
* @until transit_go
|
|
*
|
|
* As you can see, this code is very easy to understand. First, we create the
|
|
* transition itself with elm_transit_add(). Then we add the button to this
|
|
* transition with elm_transit_object_add(), which means that the transition
|
|
* will operate over this button. The effect that we want now is changing the
|
|
* object size from 100x50 to 300x150, and can be achieved by adding the
|
|
* resize effect with elm_transit_effect_resizing_add().
|
|
*
|
|
* Finally, we set the transition time to 5 seconds and start the transition
|
|
* with elm_transit_go(). If we wanted more effects applied to this
|
|
* button, we could add them to the same transition. See the
|
|
* @ref transit_example_03_c to watch many transitions being applied to an
|
|
* object.
|
|
*/
|
|
|
|
/**
|
|
* @page transit_example_02_explained elm_transit - Chained transitions.
|
|
* @dontinclude transit_example_02.c
|
|
*
|
|
* The full code for this example can be found at @ref transit_example_02_c.
|
|
*
|
|
* This example shows how to implement a chain of transitions. This chain is
|
|
* used to start a transition just after another transition ended. Similarly
|
|
* to every other elementary example, we create a window, set its title,
|
|
* size, autodel property, and setup a callback to exit the program when
|
|
* finished:
|
|
*
|
|
* @skip on_done
|
|
* @until evas_object_resize
|
|
*
|
|
* We also add a resizeable white background to use behind our animation:
|
|
*
|
|
* @skip bg_add
|
|
* @until evas_object_show
|
|
*
|
|
* This example will have a chain of 4 transitions, each of them applied to
|
|
* one button. Thus we create 4 different buttons:
|
|
*
|
|
* @skip button_add
|
|
* @until evas_object_show(bt4)
|
|
*
|
|
* Now we create a simple translation transition that will be started as soon
|
|
* as the program loads. It will be our first transition, and the other
|
|
* transitions will be started just after this transition ends:
|
|
*
|
|
* @skip transit_add
|
|
* @until transit_go
|
|
*
|
|
* The code displayed until now has nothing different from what you have
|
|
* already seen in @ref transit_example_01_explained, but now comes the new
|
|
* part: instead of creating a second transition that will start later using
|
|
* a timer, we create the it normally, and use
|
|
* elm_transit_chain_transit_add() instead of elm_transit_go. Since we are
|
|
* adding it in a chain after the first transition, it will start as soon as
|
|
* the first transition ends:
|
|
*
|
|
* @skip transit_add
|
|
* @until transit_chain_transit_add
|
|
*
|
|
* Finally we add the 2 other transitions to the chain, and run our program.
|
|
* It will make one transition start after the other finish, and there is the
|
|
* transition chain.
|
|
*/
|
|
|
|
/**
|
|
* @page general_functions_example_page General (top-level) functions example
|
|
* @dontinclude general_funcs_example.c
|
|
*
|
|
* As told in their documentation blocks, the
|
|
* elm_app_compile_*_dir_set() family of functions have to be called
|
|
* before elm_app_info_set():
|
|
* @skip tell elm about
|
|
* @until elm_app_info_set
|
|
*
|
|
* We are here setting the fallback paths to the compiling time target
|
|
* paths, naturally. If you're building the example out of the
|
|
* project's build system, we're assuming they are the canonical ones.
|
|
*
|
|
* After the program starts, elm_app_info_set() will actually run and
|
|
* then you'll see an intrincasy: Elementary does the prefix lookup @b
|
|
* twice. This is so because of the quicklaunch infrastructure in
|
|
* Elementary (@ref Start), which will register a predefined prefix
|
|
* for possible users of the launch schema. We're not hooking into a
|
|
* quick launch, so this first call can't be avoided.
|
|
*
|
|
* If you ran this example from your "bindir" installation
|
|
* directiory, no output will emerge from these both attempts -- it
|
|
* will find the "magic" file there registered and set the prefixes
|
|
* silently. Otherwise, you could get something like:
|
|
@verbatim
|
|
WARNING: Could not determine its installed prefix for 'ELM'
|
|
so am falling back on the compiled in default:
|
|
usr
|
|
implied by the following:
|
|
bindir = usr/lib
|
|
libdir = usr/lib
|
|
datadir = usr/share/elementary
|
|
localedir = usr/share/locale
|
|
Try setting the following environment variables:
|
|
ELM_PREFIX - points to the base prefix of install
|
|
or the next 4 variables
|
|
ELM_BIN_DIR - provide a specific binary directory
|
|
ELM_LIB_DIR - provide a specific library directory
|
|
ELM_DATA_DIR - provide a specific data directory
|
|
ELM_LOCALE_DIR - provide a specific locale directory
|
|
@endverbatim
|
|
* if you also didn't change those environment variables (remember
|
|
* they are also a valid way of communicating your prefix to the
|
|
* binary) - this is the scenario where it fallbacks to the paths set
|
|
* for compile time.
|
|
*
|
|
* Then, you can check the prefixes set on the standard output:
|
|
* @skip prefix was set to
|
|
* @until locale directory is
|
|
*
|
|
* In the fragment
|
|
* @skip by using this policy
|
|
* @until elm_win_autodel_set
|
|
* we demonstrate the use of Elementary policies. The policy defining
|
|
* under which circunstances our application should quit automatically
|
|
* is set to when its last window is closed (this one has just one
|
|
* window, though). This will save us from having to set a callback
|
|
* ourselves on the window, like done in @ref bg_example_01_c "this"
|
|
* example. Note that we need to tell the window to delete itself's
|
|
* object on a request to destroy the canvas coming, with
|
|
* elm_win_autodel_set().
|
|
*
|
|
* What follows is some boilerplate code, creating a frame with a @b
|
|
* button, our object of interest, and, below, widgets to change the
|
|
* button's behavior and exemplify the group of functions in question.
|
|
*
|
|
* @dontinclude general_funcs_example.c
|
|
* We enabled the focus highlight object for this window, so that you
|
|
* can keep track of the current focused object better:
|
|
* @skip elm_win_focus_highlight_enabled_set
|
|
* @until evas_object_show
|
|
* Use the tab key to navigate through the focus chain.
|
|
*
|
|
* @dontinclude general_funcs_example.c
|
|
* While creating the button, we exemplify how to use Elementary's
|
|
* finger size information to scale our UI:
|
|
* @skip fprintf(stdout, "Elementary
|
|
* @until evas_object_show
|
|
*
|
|
* @dontinclude general_funcs_example.c
|
|
* The first checkbox's callback is:
|
|
* @skip static void
|
|
* @until }
|
|
* When unsetting the checkbox, we disable the button, which will get a new
|
|
* decoration (greyed out) and stop receiving events. The focus chain
|
|
* will also ignore it.
|
|
*
|
|
* Following, there are 2 more buttons whose actions are focus/unfocus
|
|
* the top button, respectively:
|
|
* @skip focus callback
|
|
* @until }
|
|
* and
|
|
* @skip unfocus callback
|
|
* @until }
|
|
* Note the situations in which they won't take effect:
|
|
* - the button is not allowed to get focus or
|
|
* - the button is disabled
|
|
*
|
|
* The first restriction above you'll get by a second checkbox, whose
|
|
* callback is:
|
|
* @skip focus allow callback
|
|
* @until }
|
|
* Note that the button will still get mouse events, though.
|
|
*
|
|
* Next, there's a slider controlling the button's scale:
|
|
* @skip scaling callback
|
|
* @until }
|
|
*
|
|
* Experiment with it, so you understand the effect better. If you
|
|
* change its value, it will mess with the button's original size,
|
|
* naturally.
|
|
*
|
|
* The full code for this example can be found
|
|
* @ref general_functions_example_c "here".
|
|
*/
|
|
|
|
/**
|
|
* @page theme_example_01 Theme - Using extensions
|
|
*
|
|
* @dontinclude theme_example_01.c
|
|
*
|
|
* Using extensions is extremely easy, discarding the part where you have to
|
|
* write the theme for them.
|
|
*
|
|
* In the following example we'll be creating two buttons, one to load or
|
|
* unload our extension theme and one to cycle around three possible styles,
|
|
* one of which we created.
|
|
*
|
|
* After including our one and only header we'll jump to the callback for
|
|
* the buttons. First one takes care of loading or unloading our extension
|
|
* file, relative to the default theme set (thus the @c NULL in the
|
|
* functions first parameter).
|
|
* @skipline Elementary.h
|
|
* @skip static void
|
|
* @until }
|
|
* @until }
|
|
* @until }
|
|
*
|
|
* The second button, as we said before, will just switch around different
|
|
* styles. In this case we have three of them. The first one is our custom
|
|
* style, named after something very unlikely to find in the default theme.
|
|
* The other two styles are the standard and one more, anchor, which exists
|
|
* in the default and is similar to the default, except the button vanishes
|
|
* when the mouse is not over it.
|
|
* @skip static void
|
|
* @until }
|
|
* @until }
|
|
*
|
|
* So what happens if the style switches to our custom one when the
|
|
* extension is loaded? Elementary falls back to the default for the
|
|
* widget.
|
|
*
|
|
* And the main function, simply enough, will create the window, set the
|
|
* buttons and their callbacks, and just to begin with our button styled
|
|
* we're also loading our extension at the beginning.
|
|
* @skip int
|
|
* @until ELM_MAIN
|
|
*
|
|
* In this case we wanted to easily remove extensions, but all adding an
|
|
* extension does is tell Elementary where else it should look for themes
|
|
* when it can't find them in the default theme. Another way to do this
|
|
* is to set the theme search order using elm_theme_set(), but this requires
|
|
* that the developer is careful not to override any user configuration.
|
|
* That can be helped by adding our theme to the end of whatver is already
|
|
* set, like in the following snippet.
|
|
* @code
|
|
* char buf[4096];
|
|
* snprintf(buf, sizeof(buf), "%s:./theme_example.edj", elme_theme_get(NULL);
|
|
* elm_theme_set(NULL, buf);
|
|
* @endcode
|
|
*
|
|
* If we were using overlays instead of extensions, the same thing applies,
|
|
* but the custom theme must be added to the front of the search path.
|
|
*
|
|
* In the end, we should be looking at something like this:
|
|
* @image html screenshots/theme_example_01.png
|
|
* @image latex screenshots/theme_example_01.eps
|
|
*
|
|
* That's all. Boringly simple, and the full code in one piece can be found
|
|
* @ref theme_example_01.c "here".
|
|
*
|
|
* And the code for our extension is @ref theme_example.edc "here".
|
|
*
|
|
* @example theme_example_01.c
|
|
* @example theme_example.edc
|
|
*/
|
|
|
|
/**
|
|
* @page theme_example_02 Theme - Using overlays
|
|
*
|
|
* @dontinclude theme_example_02.c
|
|
*
|
|
* Overlays are like extensions in that you tell Elementary that some other
|
|
* theme contains the styles you need for your program. The difference is that
|
|
* they will be look in first, so they can override the default style of any
|
|
* widget.
|
|
*
|
|
* There's not much to say about them that hasn't been said in our previous
|
|
* example about @ref theme_example_01 "extensions", so going quickly through
|
|
* the code we have a function to load or unload the theme, which will be
|
|
* called when we click any button.
|
|
* @skipline Elementary.h
|
|
* @skip static void
|
|
* @until }
|
|
*
|
|
* And the main function, creating the window and adding some buttons to it.
|
|
* We load our theme as an overlay and nothing else. Notice there's no style
|
|
* set for any button there, which means they should be using the default
|
|
* that we override.
|
|
* @skip int
|
|
* @until ELM_MAIN
|
|
*
|
|
* That's pretty much it. The full code is @ref theme_example_02.c "here" and
|
|
* the definition of the theme is the same as before, and can be found in
|
|
* @ref theme_example.edc "here".
|
|
*
|
|
* @example theme_example_02.c
|
|
*/
|
|
|
|
/**
|
|
* @page button_example_01 Button - Complete example
|
|
*
|
|
* @dontinclude button_example_01.c
|
|
*
|
|
* A button is simple, you click on it and something happens. That said,
|
|
* we'll go through an example to show in detail the button API less
|
|
* commonly used.
|
|
*
|
|
* In the end, we'll be presented with something that looks like this:
|
|
* @image html screenshots/button_01.png
|
|
* @image latex screenshots/button_01.eps
|
|
*
|
|
* The full code of the example is @ref button_example_01.c "here" and we
|
|
* will follow here with a rundown of it.
|
|
*
|
|
* @skip Elementary.h
|
|
* @until Elementary.h
|
|
* @skip struct
|
|
* @until App_Data
|
|
*
|
|
* We have several buttons to set different times for the autorepeat timeouts
|
|
* of the buttons that use it and a few more that we keep track of in our
|
|
* data struct. The mid button doesn't do much, just moves around according
|
|
* to what other buttons the user presses. Then four more buttons to move the
|
|
* central one, and we're also keeping track of the icon set in the middle
|
|
* button, since when this one moves, we change the icon, and when movement
|
|
* is finished (by releasing one of the four arrow buttons), we set back the
|
|
* normal icon.
|
|
* @skip static void
|
|
* @until }
|
|
*
|
|
* Keeping any of those four buttons pressed will trigger their autorepeat
|
|
* callback, where we move the button doing some size hint magic. To
|
|
* understand how that works better, refer to the @ref Box documentation.
|
|
* Also, the first time the function is called, we change the icon in the
|
|
* middle button, using elm_button_icon_unset() first to keep the reference
|
|
* to the previous one, so we don't need to recreate it when we are done
|
|
* moving it.
|
|
* @skip static void
|
|
* @until }
|
|
* @until size_hint_align_set
|
|
* @until }
|
|
*
|
|
* One more callback for the option buttons, that just sets the timeouts for
|
|
* the different autorepeat options.
|
|
*
|
|
* @skip static void
|
|
* @until }
|
|
* @until }
|
|
* @until }
|
|
*
|
|
* And the main function, which does some setting up of the buttons in boxes
|
|
* to make things work. Here we'll go through some snippets only.
|
|
*
|
|
* For the option buttons, it's just the button with its label and callback.
|
|
* @skip elm_button_add
|
|
* @until smart_callback_add
|
|
*
|
|
* For the ones that move the central button, we have no labels. There are
|
|
* icons instead, and the autorepeat option is toggled.
|
|
* @skip Gap: 1.0
|
|
* @skip elm_button_add
|
|
* @until data.cursors.up
|
|
*
|
|
* And just to show the mid button, which doesn't have anything special.
|
|
* @skip data.cursors.left
|
|
* @skip elm_button_add
|
|
* @until data.mid
|
|
*
|
|
* And we are done.
|
|
*
|
|
* @example button_example_01.c
|
|
*/
|
|
|
|
/**
|
|
* @page bubble_01_example_page elm_bubble - Simple use.
|
|
* @dontinclude bubble_example_01.c
|
|
*
|
|
* This example shows a bubble with all fields set(label, info, content and
|
|
* icon) and the selected corner changing when the bubble is clicked. To be
|
|
* able use a bubble we need to do some setup and create a window, for this
|
|
* example we are going to ignore that part of the code since it isn't
|
|
* relevant to the bubble.
|
|
*
|
|
* To have the selected corner change in a clockwise motion we are going to
|
|
* use the following callback:
|
|
* @skip static
|
|
* @until }
|
|
* @until }
|
|
*
|
|
* Here we are creating an elm_label that is going to be used as the content
|
|
* for our bubble:
|
|
* @skipline elm_label
|
|
* @until show
|
|
* @note You could use any evas_object for this, we are using an elm_label
|
|
* for simplicity.
|
|
*
|
|
* Despite it's name the bubble's icon doesn't have to be an icon, it can be
|
|
* any evas_object. For this example we are going to make the icon a simple
|
|
* blue rectangle:
|
|
* @until show
|
|
*
|
|
* And finally we have the actual bubble creation and the setting of it's
|
|
* label, info and content:
|
|
* @until content
|
|
* @skipline show
|
|
* @note Because we didn't set a corner, the default("top_left") will be
|
|
* used.
|
|
*
|
|
* Now that we have our bubble all that is left is connecting the "clicked"
|
|
* signals to our callback:
|
|
* @line smart_callback
|
|
*
|
|
* This last bubble we created was very complete, so it's pertinent to show
|
|
* that most of that stuff is optional a bubble can be created with nothing
|
|
* but content:
|
|
* @until content
|
|
* @skipline show
|
|
*
|
|
* Our example will look like this:
|
|
* @image html screenshots/bubble_example_01.png
|
|
* @image latex screenshots/bubble_example_01.eps
|
|
*
|
|
* See the full source code @ref bubble_example_01.c here.
|
|
* @example bubble_example_01.c
|
|
*/
|
|
|
|
/**
|
|
* @page box_example_01 Box - Basic API
|
|
*
|
|
* @dontinclude button_example_01.c
|
|
*
|
|
* As a special guest tonight, we have the @ref button_example_01 "simple
|
|
* button example". There are plenty of boxes in it, and to make the cursor
|
|
* buttons that moved a central one around when pressed, we had to use a
|
|
* variety of values for their hints.
|
|
*
|
|
* To start, let's take a look at the handling of the central button when
|
|
* we were moving it around. To achieve this effect without falling back to
|
|
* a complete manual positioning of the @c Evas_Object in our canvas, we just
|
|
* put it in a box and played with its alignment within it, as seen in the
|
|
* following snippet of the callback for the pressed buttons.
|
|
* @skip evas_object_size_hint_align_get
|
|
* @until evas_object_size_hint_align_set
|
|
*
|
|
* Not much to it. We get the current alignment of the object and change it
|
|
* by just a little, depending on which button was pressed, then set it
|
|
* again, making sure we stay within the 0.0-1.0 range so the button moves
|
|
* inside the space it has, instead of disappearing under the other objects.
|
|
*
|
|
* But as useful as an example as that may have been, the usual case with boxes
|
|
* is to set everything at the moment they are created, like we did for
|
|
* everything else in our main function.
|
|
*
|
|
* The entire layout of our program is made with boxes. We have one set as the
|
|
* resize object for the window, which means it will always be resized with
|
|
* the window. The weight hints set to @c EVAS_HINT_EXPAND will tell the
|
|
* window that the box can grow past it's minimum size, which allows resizing
|
|
* of it.
|
|
* @skip elm_main
|
|
* @skip elm_box_add
|
|
* @until evas_object_show
|
|
*
|
|
* Two more boxes, set to horizontal, hold the buttons to change the autorepeat
|
|
* configuration used by the buttons. We create each to take over all the
|
|
* available space horizontally, but we don't want them to grow vertically,
|
|
* so we keep that axis of the weight with 0.0. Then it gets packed in the
|
|
* main box.
|
|
* @skip box2
|
|
* @until evas_object_show
|
|
*
|
|
* The buttons in each of those boxes have nothing special, they are just packed
|
|
* in with their default values and the box will use their minimum size, as set
|
|
* by Elementary itself based on the label, icon, finger size and theme.
|
|
*
|
|
* But the buttons used to move the central one have a special disposition.
|
|
* The top one first, is placed right into the main box like our other smaller
|
|
* boxes. Set to expand horizontally and not vertically, and in this case we
|
|
* also tell it to fill that space, so it gets resized to take the entire
|
|
* width of the window.
|
|
* @skip Gap: 1.0
|
|
* @skip elm_button_add
|
|
* @until evas_object_show
|
|
*
|
|
* The bottom one will be the same, but for the other two we need to use a
|
|
* second box set to take as much space as we have, so we can place our side
|
|
* buttons in place and have the big empty space where the central button will
|
|
* move.
|
|
* @skip elm_box_add
|
|
* @until evas_object_show
|
|
*
|
|
* Then the buttons will have their hints inverted to the other top and bottom
|
|
* ones, to expand and fill vertically and keep their minimum size horizontally.
|
|
* @skip elm_button_add
|
|
* @until evas_object_show
|
|
*
|
|
* The central button takes every thing else. It will ask to be expanded in
|
|
* both directions, but without filling its cell. Changing its alignment by
|
|
* pressing the buttons will make it move around.
|
|
* @skip elm_button_add
|
|
* @until evas_object_show
|
|
*
|
|
* To end, the rightmost button is packed in the smaller box after the central
|
|
* one, and back to the main box we have the bottom button at the end.
|
|
*/
|
|
|
|
/**
|
|
* @page box_example_02 Box - Layout transitions
|
|
*
|
|
* @dontinclude box_example_02.c
|
|
*
|
|
* Setting a customized layout for a box is simple once you have the layout
|
|
* function, which is just like the layout function for @c Evas_Box. The new
|
|
* and fancier thing we can do with Elementary is animate the transition from
|
|
* one layout to the next. We'll see now how to do that through a simple
|
|
* example, while also taking a look at some of the API that was left
|
|
* untouched in our @ref box_example_01 "previous example".
|
|
*
|
|
* @image html screenshots/box_example_02.png
|
|
* @image latex screenshots/box_example_02.eps
|
|
*
|
|
* @skipline Elementary.h
|
|
*
|
|
* Our application data consists of a list of layout functions, given by
|
|
* @c transitions. We'll be animating through them throughout the entire run.
|
|
* The box with the stuff to move around and the last layout that was set to
|
|
* make things easier in the code.
|
|
* @skip typedef
|
|
* @until Transitions_Data
|
|
*
|
|
* The box starts with three buttons, clicking on any of them will take it
|
|
* out of the box without deleting the object. There are also two more buttons
|
|
* outside, one to add an object to the box and the other to clear it.
|
|
* This is all to show how you can interact with the items in the box, add
|
|
* things and even remove them, while the transitions occur.
|
|
*
|
|
* One of the callback we'll be using creates a new button, asks the box for
|
|
* the list of its children and if it's not empty, we add the new object after
|
|
* the first one, otherwise just place at the end as it will not make any
|
|
* difference.
|
|
* @skip static void
|
|
* @until }
|
|
* @until }
|
|
*
|
|
* The clear button is even simpler. Everything in the box will be deleted,
|
|
* leaving it empty and ready to fill it up with more stuff.
|
|
* @skip static void
|
|
* @until }
|
|
*
|
|
* And a little function to remove buttons from the box without deleting them.
|
|
* This one is set for the @c clicked callback of the original buttons,
|
|
* unpacking them when clicked and placing it somewhere in the screen where
|
|
* they will not disturb. Once we do this, the box no longer has any control
|
|
* of it, so it will be left untouched until the program ends.
|
|
* @skip static void
|
|
* @until }
|
|
*
|
|
* If we wanted, we could just call @c evas_object_del() on the object to
|
|
* destroy it. In this case, no unpack is really necessary, as the box would
|
|
* be notified of a child being deleted and adjust its calculations accordingly.
|
|
*
|
|
* The core of the program is the following function. It takes whatever
|
|
* function is first on our list of layouts and together with the
|
|
* @c last_layout, it creates an ::Elm_Box_Transition to use with
|
|
* elm_box_layout_transition(). In here, we tell it to start from whatever
|
|
* layout we last set, end with the one that was at the top of the list and
|
|
* when everything is finished, call us back so we can create another
|
|
* transition. Finally, move the new layout to the end of the list so we
|
|
* can continue running through them until the program ends.
|
|
* @skip static void
|
|
* @until }
|
|
*
|
|
* The main function doesn't have antyhing special. Creation of box, initial
|
|
* buttons and some callback setting. The only part worth mentioning is the
|
|
* initialization of our application data.
|
|
* @skip tdata.box
|
|
* @until evas_object_box_layout_stack
|
|
*
|
|
* We have a simple static variable, set the box, the first layout we are
|
|
* using as last and create the list with the different functions to go
|
|
* through.
|
|
*
|
|
* And in the end, we set the first layout and call the same function we went
|
|
* through before to start the run of transitions.
|
|
* @until _test_box_transition_change
|
|
*
|
|
* For the full code, follow @ref box_example_02.c "here".
|
|
*
|
|
* @example box_example_02.c
|
|
*/
|
|
|
|
/**
|
|
* @page clock_example Clock widget example
|
|
*
|
|
* This code places five Elementary clock widgets on a window, each of
|
|
* them exemplifying a part of the widget's API.
|
|
*
|
|
* The first of them is the pristine clock:
|
|
* @dontinclude clock_example.c
|
|
* @skip pristine
|
|
* @until evas_object_show
|
|
* As you see, the defaults for a clock are:
|
|
* - military time
|
|
* - no seconds shown
|
|
*
|
|
* For am/pm time, see the second clock:
|
|
* @dontinclude clock_example.c
|
|
* @skip am/pm
|
|
* @until evas_object_show
|
|
*
|
|
* The third one will show the seconds digits, which will flip in
|
|
* synchrony with system time. Note, besides, that the time itself is
|
|
* @b different from the system's -- it was customly set with
|
|
* elm_clock_time_set():
|
|
* @dontinclude clock_example.c
|
|
* @skip with seconds
|
|
* @until evas_object_show
|
|
*
|
|
* In both fourth and fifth ones, we turn on the <b>edition
|
|
* mode</b>. See how you can change each of the sheets on it, and be
|
|
* sure to try holding the mouse pressed over one of the sheet
|
|
* arrows. The forth one also starts with a custom time set:
|
|
* @dontinclude clock_example.c
|
|
* @skip in edition
|
|
* @until evas_object_show
|
|
*
|
|
* The fifth, besides editable, has only the time @b units editable,
|
|
* for hours, minutes and seconds. This exemplifies
|
|
* elm_clock_digit_edit_set():
|
|
* @dontinclude clock_example.c
|
|
* @skip but only
|
|
* @until evas_object_show
|
|
*
|
|
* See the full @ref clock_example.c "example", whose window should
|
|
* look like this picture:
|
|
* @image html screenshots/clock_example.png
|
|
* @image latex screenshots/clock_example.eps
|
|
*
|
|
* @example clock_example.c
|
|
*/
|
|
|
|
/**
|
|
* @page flipselector_example Flip selector widget example
|
|
*
|
|
* This code places an Elementary flip selector widget on a window,
|
|
* along with two buttons trigerring actions on it (though its API).
|
|
*
|
|
* The selector is being populated with the following items:
|
|
* @dontinclude flipselector_example.c
|
|
* @skip lbl[]
|
|
* @until ;
|
|
*
|
|
* Next, we create it, populating it with those items and registering
|
|
* two (smart) callbacks on it:
|
|
* @dontinclude flipselector_example.c
|
|
* @skip fp = elm_flipselector_add
|
|
* @until object_show
|
|
*
|
|
* Those two callbacks will take place whenever one of those smart
|
|
* events occur, and they will just print something to @c stdout:
|
|
* @dontinclude flipselector_example.c
|
|
* @skip underflow callback
|
|
* @until static void
|
|
* Flip the sheets on the widget while looking at the items list, in
|
|
* the source code, and you'll get the idea of those events.
|
|
*
|
|
* The two buttons below the flip selector will take the actions
|
|
* described in their labels:
|
|
* @dontinclude flipselector_example.c
|
|
* @skip bt = elm_button_add
|
|
* @until callback_add(win
|
|
*
|
|
* @dontinclude flipselector_example.c
|
|
* @skip unselect the item
|
|
* @until underflow
|
|
*
|
|
* Click on them to exercise those flip selector API calls. To
|
|
* interact with the other parts of this API, there's a command line
|
|
* interface, whose help string can be asked for with the 'h' key:
|
|
* @dontinclude flipselector_example.c
|
|
* @skip commands
|
|
* @until ;
|
|
*
|
|
* The 'n' and 'p' keys will exemplify elm_flipselector_flip_next()
|
|
* and elm_flipselector_flip_prev(), respectively. 'f' and 'l' account
|
|
* for elm_flipselector_first_item_get() and
|
|
* elm_flipselector_last_item_get(), respectively. Finally, 's' will
|
|
* issue elm_flipselector_selected_item_get() on our example flip
|
|
* selector widget.
|
|
*
|
|
* See the full @ref flipselector_example.c "example", whose window should
|
|
* look like this picture:
|
|
* @image html screenshots/flipselector_example.png
|
|
* @image latex screenshots/flipselector_example.eps
|
|
*
|
|
* @example flipselector_example.c
|
|
*/
|
|
|
|
/**
|
|
* @page tutorial_flip Flip example
|
|
* @dontinclude flip_example_01.c
|
|
*
|
|
* This example will show a flip with two rectangles on it(one blue, one
|
|
* green). Our example will allow the user to choose the animation the flip
|
|
* uses and to interact with it. To allow the user to choose the interaction
|
|
* mode we use radio buttons, we will however not explain them, if you would
|
|
* like to know more about radio buttons see @ref radio.
|
|
*
|
|
* We start our example with the usual setup and then create the 2 rectangles
|
|
* we will use in our flip:
|
|
* @until show(rect2)
|
|
*
|
|
* The next thing to do is to create our flip and set it's front and back
|
|
* content:
|
|
* @until show
|
|
*
|
|
* The next thing we do is set the interaction mode(which the user can later
|
|
* change) to the page animation:
|
|
* @until PAGE
|
|
*
|
|
* Setting a interaction mode however is not sufficient, we also need to
|
|
* choose which directions we allow interaction from, for this example we
|
|
* will use all of them:
|
|
* @until RIGHT
|
|
*
|
|
* We are also going to set the hitsize to the entire flip(in all directions)
|
|
* to make our flip very easy to interact with:
|
|
* @until RIGHT
|
|
*
|
|
* After that we create our radio buttons and start the main loop:
|
|
* @until ELM_MAIN()
|
|
*
|
|
* When the user clicks a radio button a function that changes the
|
|
* interaction mode and animates the flip is called:
|
|
* @until }
|
|
* @note The elm_flip_go() call here serves no purpose other than to
|
|
* ilustrate that it's possible to animate the flip programmatically.
|
|
*
|
|
* Our example will look like this:
|
|
* @image html screenshots/flip_example_01.png
|
|
* @image latex screenshots/flip_example_01.eps
|
|
* @note Since this is an animated example the screenshot doesn't do it
|
|
* justice, it is a good idea to compile it and see the animations.
|
|
*
|
|
* @example flip_example_01.c
|
|
*/
|
|
|
|
/**
|
|
* @page bg_example_01_c bg_example_01.c
|
|
* @include bg_example_01.c
|
|
* @example bg_example_01.c
|
|
*/
|
|
|
|
/**
|
|
* @page bg_example_02_c bg_example_02.c
|
|
* @include bg_example_02.c
|
|
* @example bg_example_02.c
|
|
*/
|
|
|
|
/**
|
|
* @page bg_example_03_c bg_example_03.c
|
|
* @include bg_example_03.c
|
|
* @example bg_example_03.c
|
|
*/
|
|
|
|
/**
|
|
* @page actionslider_example_01 Actionslider example
|
|
* @include actionslider_example_01.c
|
|
* @example actionslider_example_01.c
|
|
*/
|
|
|
|
/**
|
|
* @page animator_example_01_c Animator example 01
|
|
* @include animator_example_01.c
|
|
* @example animator_example_01.c
|
|
*/
|
|
|
|
/**
|
|
* @page transit_example_01_c Transit example 1
|
|
* @include transit_example_01.c
|
|
* @example transit_example_01.c
|
|
*/
|
|
|
|
/**
|
|
* @page transit_example_02_c Transit example 2
|
|
* @include transit_example_02.c
|
|
* @example transit_example_02.c
|
|
*/
|
|
|
|
/**
|
|
* @page general_functions_example_c General (top-level) functions example
|
|
* @include general_funcs_example.c
|
|
* @example general_funcs_example.c
|
|
*/
|