forked from enlightenment/efl
Adding a new signal example
Patch by: Guilherme Iscaro <iscaro@profusion.mobi> SVN revision: 69973
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@ -17,6 +17,7 @@
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* @li @ref tutorial_edje_animations
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* @li @ref tutorial_edje_multisense
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* @li @ref tutorial_edje_basic2
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* @li @ref tutorial_edje_signals_2
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*/
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/**
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@ -1105,3 +1106,78 @@
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* edje_cc swallow.edc
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* @endverbatim
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*/
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/**
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* @page tutorial_edje_signals_2 Edje Signals example 2
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*
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* In this example we will make use of signals to help to move an image away from the mouse pointer.
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*
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* Signals are software interruption, this means that when it happens and if the program is sensitive to it
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* the program will stop whatever it is doing and handle the signal.
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*
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* In this example we are only sensitive to the "mouve,move" signal so we need to register a callback to it.
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* To do this we will add a signal callback to our edje object that will detect "mouse,move" signal
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* comming from the part "part_image" and when this happens we will call the fuction _on_mouse_over passing
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* the evas pointer as a parameter. The evas pointer is passed as a parameter because we need to know
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* where is the mouse pointer in the screen.
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*
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* We can see bellow how we can listen to the signal:
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*
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* @dontinclude signals2.c
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* @skip edje_object_signal
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* @until );
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*
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*
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* Now, let's pass to the callback function. If we want to keep the ball away from the mouse pointer
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* we need to now where is the ball and where is the mouse and we can easily discovery these things using
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* this:
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*
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* For the the object position in the canvas:
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* @dontinclude signals2.c
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* @skipline evas_object_geometry
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*
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* For the mouse position relative to the screen:
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* @skipline evas_pointer_output
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*
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* Now that we have the position of the mouse and the object we just need
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* to set the new location and move the object. To set the new location we do this:
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* @skip if
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* @until y -= (
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*
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* You can change the formula above if you like. Because we are changing the object's position
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* we need to do something if the new position is beyound the canvas size. So here it is:
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*
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* @skip if
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* @until y = 0
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*
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* Then now what we need to do is move the object:
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* @skipline evas_object
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*
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* Here is the complete callback function:
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*
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* @dontinclude signals2.c
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* @skip _on_mouse_over
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* @until }
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*
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*
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* When you compile and run it you should see this:
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* @image html signal2final.png
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* @image rtf signal2final.png
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* @image latex signal2final.eps width=\textwidth
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*
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* The .edc file:
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* @include signalsBubble.edc
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*
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* The source code:
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* @include signals2.c
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*
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* To compile use this command:
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* @verbatim
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* gcc -o signals2 signals2.c -DPACKAGE_BIN_DIR=\"/Where/enlightenment/is/installed/bin\"
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* -DPACKAGE_LIB_DIR=\"/Where/enlightenment/is/installed/lib\"
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* -DPACKAGE_DATA_DIR=\"/Where/enlightenment/is/installed/share\"
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* `pkg-config --cflags --libs evas ecore ecore-evas edje`
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*
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* edje_cc -id /path/to/the/image signalsBubble.edc
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* @endverbatim
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*/
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File diff suppressed because it is too large
Load Diff
Binary file not shown.
After Width: | Height: | Size: 11 KiB |
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@ -0,0 +1,134 @@
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#else
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#define PACKAGE_EXAMPLES_DIR "."
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#define __UNUSED__
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#endif
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#include <Ecore.h>
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#include <Ecore_Evas.h>
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#include <Edje.h>
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#include <stdio.h>
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#define WIDTH (700)
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#define HEIGHT (700)
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static void
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_on_delete(Ecore_Evas *ee __UNUSED__)
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{
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ecore_main_loop_quit();
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}
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/* mouse over signals */
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static void
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_on_mouse_over(void *data, Evas_Object *edje_obj,
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const char *emission __UNUSED__, const char *source __UNUSED__)
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{
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Evas *evas;
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int x, y, mouseX, mouseY;
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evas = (Evas *) data;
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evas_object_geometry_get(edje_obj, &x, &y, NULL, NULL);
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evas_pointer_output_xy_get(evas, &mouseX, &mouseY);
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if ((rand() % 2) == 0)
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x += ((mouseX - x) + (x / 4 + mouseY / 2));
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else
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x -= ((mouseX - x) + (x / 4 + mouseY / 2));
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if ((rand() % 2) == 0)
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y += ((mouseY - y) + (y / 4 + mouseX / 2));
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else
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y -= ((mouseY - y) + (y / 4 + mouseX / 2));
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if (x > WIDTH)
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x = WIDTH;
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else if (x < 0) x = 0;
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if (y > HEIGHT)
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y = HEIGHT;
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else if (y < 0) y = 0;
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fprintf(stdout, "Moving object to - (%d,%d)\n", x, y);
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evas_object_move(edje_obj, x, y);
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}
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int
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main(int argc __UNUSED__, char **argv)
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{
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const char *edje_file = "signalsBubble.edj";
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char edje_file_path[PATH_MAX];
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Eina_Prefix *pfx;
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Ecore_Evas *ee;
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Evas *evas;
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Evas_Object *bg;
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Evas_Object *edje_obj;
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if (!ecore_evas_init()) return EXIT_FAILURE;
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if (!edje_init()) goto shutdown_ecore_evas;
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pfx = eina_prefix_new(argv[0], main, "EDJE_EXAMPLES", "edje/examples",
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edje_file, PACKAGE_BIN_DIR, PACKAGE_LIB_DIR,
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PACKAGE_DATA_DIR, PACKAGE_DATA_DIR);
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if (!pfx) goto shutdown_edje;
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ee = ecore_evas_new(NULL, 0, 0, WIDTH, HEIGHT, NULL);
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if (!ee) goto eina_prefix_free;
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ecore_evas_callback_delete_request_set(ee, _on_delete);
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ecore_evas_title_set(ee, "Edje animations and signals");
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evas = ecore_evas_get(ee);
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bg = evas_object_rectangle_add(evas);
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evas_object_color_set(bg, 255, 255, 255, 255); //White
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evas_object_move(bg, 0, 0); //orign
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evas_object_resize(bg, WIDTH, HEIGHT); //cover the window
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evas_object_show(bg);
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ecore_evas_object_associate(ee, bg, ECORE_EVAS_OBJECT_ASSOCIATE_BASE);
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evas_object_focus_set(bg, EINA_TRUE);
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edje_obj = edje_object_add(evas);
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snprintf(edje_file_path, sizeof(edje_file_path), "%s/examples/%s",
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eina_prefix_data_get(pfx), edje_file);
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if (!edje_object_file_set(edje_obj, edje_file_path, "image_group"))
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{
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int err = edje_object_load_error_get(edje_obj);
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const char *errmsg = edje_load_error_str(err);
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fprintf(stderr, "Could not load the edje file - reason:%s\n", errmsg);
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goto eina_prefix_free;
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}
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edje_object_signal_callback_add(edje_obj, "mouse,move", "part_image",
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_on_mouse_over, evas);
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evas_object_resize(edje_obj, 63, 63);
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evas_object_move(edje_obj, 50, 50);
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evas_object_show(edje_obj);
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ecore_evas_show(ee);
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ecore_main_loop_begin();
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eina_prefix_free(pfx);
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ecore_evas_free(ee);
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edje_shutdown();
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ecore_evas_shutdown();
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return EXIT_SUCCESS;
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eina_prefix_free: eina_prefix_free(pfx);
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shutdown_edje: edje_shutdown();
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shutdown_ecore_evas: ecore_evas_shutdown();
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return EXIT_FAILURE;
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}
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@ -0,0 +1,22 @@
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collections{
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group{
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name: "image_group";
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max: 500 500;
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min: 50 50;
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images{
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image: "bubble.png" COMP;
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}
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parts{
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part{
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name: "part_image";
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type: IMAGE;
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description{
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min:63 63;
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image{
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normal: "bubble.png";
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}
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}
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}
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}
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}
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}
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@ -173,6 +173,7 @@ part of Edje's API:
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- @ref tutorial_edje_color_class
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- @ref tutorial_edje_animations
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- @ref Example_Edje_Signals_Messages
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- @ref tutorial_edje_signals_2
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- @ref tutorial_edje_text
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- @ref tutorial_edje_drag
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- @ref tutorial_edje_perspective
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