add ecore_imf_example code. I will add Makefile.am in example directory later
SVN revision: 71620
This commit is contained in:
Jihoon Kim
parent
90588c2527
commit
27c45e60db
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@ -22,6 +22,7 @@
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* @li @ref Ecore_Evas_Buffer_Example_01_c
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* @li @ref Ecore_Evas_Buffer_Example_02_c
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* @li @ref Ecore_exe_simple_example_c
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* @li @ref ecore_imf_example_c
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*/
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/**
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@ -1667,3 +1668,25 @@
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* communicate with it.
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*
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*/
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/**
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* @page ecore_imf_example_c ecore_imf - How to handle preedit and commit string from Input Method Framework
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*
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* This example demonstrates how to connect input method framework and handle preedit and commit string from input method framework.
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*
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* To input Chinese, Japanese, Korean and other complex languages, the editor should be connected with input method framework.
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*
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* How to initialize and shutdown ecore imf module
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* @li ecore_imf_init() should be called to initialize and load immodule.
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* @li ecore_imf_shutdown() is used for shutdowning and unloading immodule.
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*
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* How to create input context and register pre-edit and commit event handler
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*
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* Each entry should have each input context to connect with input service framework.
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* Key event is processed by input method engine.
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* The result is notified to application through ECORE_IMF_CALLBACK_PREEDIT_CHANGED and ECORE_IMF_CALLBACK_COMMIT event.
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*
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* The full example follows.
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*
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* @include ecore_imf_example.c
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*/
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@ -0,0 +1,605 @@
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/**
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* Ecore example illustrating how to use ecore imf.
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*
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* @verbatim
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* gcc -o ecore_imf_example ecore_imf_example.c `pkg-config --cflags --libs ecore evas ecore-evas ecore-imf ecore-imf-evas`
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* @endverbatim
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*/
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#include <Ecore.h>
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#include <Ecore_Evas.h>
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#include <Ecore_IMF.h>
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#include <Ecore_IMF_Evas.h>
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#include <Evas.h>
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#include <stdio.h>
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typedef struct _Entry Entry;
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struct _Entry
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{
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Evas_Object *rect;
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Evas_Object *txt_obj;
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Evas_Textblock_Style *txt_style;
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Evas_Textblock_Cursor *cursor;
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Evas_Textblock_Cursor *preedit_start;
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Evas_Textblock_Cursor *preedit_end;
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Ecore_IMF_Context *imf_context;
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Eina_Bool have_preedit : 1;
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};
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static void _mouse_up_cb(void *data, Evas *e, Evas_Object *o, void *event_info)
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{
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Entry *en = data;
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if (!en) return;
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evas_object_focus_set(en->rect, EINA_TRUE);
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}
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static void _entry_focus_in_cb(void *data, Evas *e, Evas_Object *obj, void *event_info)
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{
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Entry *en = data;
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if (!en) return;
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if (en->imf_context)
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ecore_imf_context_focus_in(en->imf_context);
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}
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static void _entry_focus_out_cb(void *data, Evas *e, Evas_Object *obj, void *event_info)
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{
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Entry *en = data;
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if (!en) return;
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if (en->imf_context)
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{
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ecore_imf_context_reset(en->imf_context);
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ecore_imf_context_focus_out(en->imf_context);
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}
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}
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static void
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_canvas_focus_in_cb(void *data, Evas *e, void *event_info)
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{
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Evas_Object *obj = evas_focus_get(e);
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if (obj)
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_entry_focus_in_cb(obj, NULL, NULL, NULL);
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}
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static void
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_canvas_focus_out_cb(void *data, Evas *e, void *event_info)
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{
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Evas_Object *obj = evas_focus_get(e);
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if (obj)
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_entry_focus_out_cb(obj, NULL, NULL, NULL);
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}
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static void
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_imf_cursor_info_set(Entry *en)
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{
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Evas_Coord x, y, w, h;
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Evas_Coord cx, cy, cw, ch; // cursor geometry
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int cursor_pos; // cursor position in chars (Not bytes)
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if (!en) return;
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// Get cursor geometry
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evas_object_geometry_get(en->txt_obj, &x, &y, &w, &h);
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evas_textblock_cursor_geometry_get(en->cursor, &cx, &cy, &cw, &ch, NULL, EVAS_TEXTBLOCK_CURSOR_BEFORE);
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// Get cursor position
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cursor_pos = evas_textblock_cursor_pos_get(en->cursor);
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ecore_imf_context_cursor_position_set(en->imf_context, cursor_pos);
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ecore_imf_context_cursor_location_set(en->imf_context, x+cx, y+cy, cw, ch);
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}
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static void _preedit_del(Entry *en)
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{
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if (!en || !en->have_preedit) return;
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if (!en->preedit_start || !en->preedit_end) return;
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if (!evas_textblock_cursor_compare(en->preedit_start, en->preedit_end)) return;
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/* delete the preedit characters */
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evas_textblock_cursor_range_delete(en->preedit_start, en->preedit_end);
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}
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static void
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_preedit_clear(Entry *en)
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{
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if (en->preedit_start)
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{
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evas_textblock_cursor_free(en->preedit_start);
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en->preedit_start = NULL;
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}
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if (en->preedit_end)
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{
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evas_textblock_cursor_free(en->preedit_end);
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en->preedit_end = NULL;
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}
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en->have_preedit = EINA_FALSE;
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}
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static Eina_Bool
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_ecore_imf_retrieve_surrounding_cb(void *data, Ecore_IMF_Context *ctx, char **text, int *cursor_pos)
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{
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/* This callback will be called when the Input Method Context module requests the surrounding context. */
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Entry *en = data;
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const char *str;
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if (!en) return;
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str = evas_object_textblock_text_markup_get(en->txt_obj);
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*text = str ? strdup(str) : strdup("");
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/* Get the current position of cursor */
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if (cursor_pos)
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*cursor_pos = evas_textblock_cursor_pos_get(en->cursor);
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return EINA_TRUE;
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}
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static void
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_ecore_imf_event_delete_surrounding_cb(void *data, Ecore_IMF_Context *ctx, void *event_info)
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{
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/* called when the input method needs to delete all or part of the context surrounding the cursor */
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Entry *en = data;
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Ecore_IMF_Event_Delete_Surrounding *ev = event_info;
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Evas_Textblock_Cursor *del_start, *del_end;
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int cursor_pos;
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if (!en) return;
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cursor_pos = evas_textblock_cursor_pos_get(en->cursor);
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del_start = evas_object_textblock_cursor_new(en->txt_obj);
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evas_textblock_cursor_pos_set(del_start, cursor_pos + ev->offset);
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del_end = evas_object_textblock_cursor_new(en->txt_obj);
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evas_textblock_cursor_pos_set(del_end, cursor_pos + ev->offset + ev->n_chars);
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/* implement function to delete character(s) from 'cursor_pos+ev->offset' cursor position to 'cursor_pos + ev->offset + ev->n_chars' */
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evas_textblock_cursor_range_delete(del_start, del_end);
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evas_textblock_cursor_free(del_start);
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evas_textblock_cursor_free(del_end);
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}
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static void _ecore_imf_event_commit_cb (void *data, Ecore_IMF_Context *ctx, void *event_info)
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{
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Entry *en = data;
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char *commit_str = (char *)event_info;
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if (!en) return;
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/* Delete preedit string */
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_preedit_del(en);
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_preedit_clear(en);
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printf ("commit string : %s\n", commit_str);
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evas_object_textblock_text_markup_prepend(en->cursor, commit_str);
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/* Notify cursor information */
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_imf_cursor_info_set(en);
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return;
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}
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static void _ecore_imf_event_preedit_changed_cb(void *data, Ecore_IMF_Context *ctx, void *event_info)
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{
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/* example how to get preedit string */
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Entry *en = data;
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char *preedit_string;
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int cursor_pos;
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Eina_List *attrs = NULL;
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Eina_List *l;
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Ecore_IMF_Preedit_Attr *attr;
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Ecore_IMF_Context * imf_context = ctx;
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int preedit_start_pos, preedit_end_pos;
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int i;
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Eina_Bool preedit_end_state = EINA_FALSE;
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if (!en) return;
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/* Get preedit string, attributes */
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ecore_imf_context_preedit_string_with_attributes_get(imf_context, &preedit_string, &attrs, &cursor_pos);
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printf("preedit string : %s\n", preedit_string);
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if (!strcmp(preedit_string, ""))
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preedit_end_state = EINA_TRUE;
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/* delete preedit */
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_preedit_del(en);
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preedit_start_pos = evas_textblock_cursor_pos_get(en->cursor);
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/* insert preedit character(s) */
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if (strlen(preedit_string) > 0)
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{
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if (attrs)
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{
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EINA_LIST_FOREACH(attrs, l, attr)
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{
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if (attr->preedit_type == ECORE_IMF_PREEDIT_TYPE_SUB1) // style type
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{
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/* apply appropriate style such as underline */
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}
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else if (attr->preedit_type == ECORE_IMF_PREEDIT_TYPE_SUB2 || attr->preedit_type == ECORE_IMF_PREEDIT_TYPE_SUB3)
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{
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/* apply appropriate style such as underline */
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}
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}
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/* insert code to display preedit string in your editor */
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evas_object_textblock_text_markup_prepend(en->cursor, preedit_string);
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}
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}
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if (!preedit_end_state)
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{
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/* set preedit start cursor */
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if (!en->preedit_start)
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en->preedit_start = evas_object_textblock_cursor_new(en->txt_obj);
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evas_textblock_cursor_copy(en->cursor, en->preedit_start);
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/* set preedit end cursor */
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if (!en->preedit_end)
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en->preedit_end = evas_object_textblock_cursor_new(en->txt_obj);
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evas_textblock_cursor_copy(en->cursor, en->preedit_end);
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preedit_end_pos = evas_textblock_cursor_pos_get(en->cursor);
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for (i = 0; i < (preedit_end_pos - preedit_start_pos); i++)
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{
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evas_textblock_cursor_char_prev(en->preedit_start);
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}
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en->have_preedit = EINA_TRUE;
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/* set cursor position */
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evas_textblock_cursor_pos_set(en->cursor, preedit_start_pos + cursor_pos);
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}
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/* Notify cursor information */
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_imf_cursor_info_set(en);
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EINA_LIST_FREE(attrs, attr) free(attr);
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free(preedit_string);
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}
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static void
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_key_down_cb(void *data, Evas *e, Evas_Object *obj, void *event_info)
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{
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Entry *en = data;
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Evas_Event_Key_Down *ev = event_info;
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Eina_Bool control, alt, shift;
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Eina_Bool multiline;
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Eina_Bool cursor_changed;
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if (!en) return;
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if (!ev->key) return;
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if (en->imf_context)
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{
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Ecore_IMF_Event_Key_Down ecore_ev;
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ecore_imf_evas_event_key_down_wrap(ev, &ecore_ev);
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if (ecore_imf_context_filter_event(en->imf_context,
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ECORE_IMF_EVENT_KEY_DOWN,
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(Ecore_IMF_Event *)&ecore_ev))
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return;
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}
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control = evas_key_modifier_is_set(ev->modifiers, "Control");
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alt = evas_key_modifier_is_set(ev->modifiers, "Alt");
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shift = evas_key_modifier_is_set(ev->modifiers, "Shift");
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if ((!strcmp(ev->keyname, "Escape")) ||
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(!strcmp(ev->keyname, "Return")) || (!strcmp(ev->keyname, "KP_Enter")))
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ecore_imf_context_reset(en->imf_context);
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if (!strcmp(ev->key, "Escape"))
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{
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// dead keys here. Escape for now (should emit these)
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ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
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}
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else if (!strcmp(ev->key, "Up") || !strcmp(ev->key, "KP_Up"))
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{
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// FILLME
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}
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else if (!strcmp(ev->key, "Down") || !strcmp(ev->key, "KP_Down"))
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{
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// FILLME
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}
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else if (!strcmp(ev->key, "Left") || !strcmp(ev->key, "KP_Left"))
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{
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// FILLME
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}
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else if (!strcmp(ev->key, "Right") || !strcmp(ev->key, "KP_Right"))
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{
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// FILLME
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}
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else if (!strcmp(ev->key, "BackSpace"))
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{
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if (evas_textblock_cursor_char_prev(en->cursor))
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evas_textblock_cursor_char_delete(en->cursor);
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return;
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}
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else if (!strcmp(ev->key, "Delete") || !strcmp(ev->key, "KP_Delete"))
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{
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// FILLME
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}
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else if (!strcmp(ev->key, "Home") || !strcmp(ev->key, "KP_Home"))
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{
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// FILLME
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}
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else if (!strcmp(ev->key, "End") || !strcmp(ev->key, "KP_End"))
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{
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// FILLME
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}
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else if ((control) && (!strcmp(ev->key, "v")))
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{
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// ctrl + v
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// FILLME
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}
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else if ((control) && (!strcmp(ev->key, "a")))
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{
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// ctrl + a
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// FILLME
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}
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else if ((control) && (!strcmp(ev->key, "A")))
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{
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// ctrl + A
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// FILLME
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}
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else if ((control) && ((!strcmp(ev->key, "c") || (!strcmp(ev->key, "Insert")))))
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{
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// ctrl + c
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// FILLME
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}
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else if ((control) && ((!strcmp(ev->key, "x") || (!strcmp(ev->key, "m")))))
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{
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// ctrl + x
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}
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else if ((control) && (!strcmp(ev->key, "z")))
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{
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// ctrl + z (undo)
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// FILLME
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}
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else if ((control) && (!strcmp(ev->key, "y")))
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{
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// ctrl + y (redo)
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// FILLME
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}
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else if (!strcmp(ev->key, "Tab"))
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{
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// FILLME
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}
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else if ((!strcmp(ev->key, "ISO_Left_Tab")) && (multiline))
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{
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// remove a tab
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}
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else if (!strcmp(ev->key, "Prior") || !strcmp(ev->key, "KP_Prior"))
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{
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// FILLME
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}
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else if (!strcmp(ev->key, "Next") || !strcmp(ev->key, "KP_Next"))
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{
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// FILLME
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}
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else if ((!strcmp(ev->key, "Return")) || (!strcmp(ev->key, "KP_Enter")))
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{
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// FILLME
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}
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else
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{
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if (ev->string) {
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printf("key down string : %s\n", ev->string);
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evas_object_textblock_text_markup_prepend(en->cursor, ev->string);
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}
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}
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/* Notify cursor information */
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_imf_cursor_info_set(en);
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}
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static void
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_key_up_cb(void *data, Evas *e, Evas_Object *obj, void *event_info)
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{
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Entry *en = data;
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Evas_Event_Key_Up *ev = event_info;
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if (!en) return;
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if (en->imf_context)
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{
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Ecore_IMF_Event_Key_Up ecore_ev;
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ecore_imf_evas_event_key_up_wrap(ev, &ecore_ev);
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if (ecore_imf_context_filter_event(en->imf_context,
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ECORE_IMF_EVENT_KEY_UP,
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(Ecore_IMF_Event *)&ecore_ev))
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return;
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}
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}
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static void
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create_input_field(Evas *evas, Entry *en, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h)
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{
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if (!en) return;
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|
||||
/* Create background for text input field */
|
||||
en->rect = evas_object_rectangle_add(evas);
|
||||
evas_object_size_hint_weight_set(en->rect, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
|
||||
evas_object_color_set(en->rect, 150, 150, 150, 255); /* gray */
|
||||
evas_object_move(en->rect, x, y);
|
||||
evas_object_resize(en->rect, w, h);
|
||||
evas_object_show(en->rect);
|
||||
|
||||
/* Create text object for displaying text */
|
||||
en->txt_obj = evas_object_textblock_add(evas);
|
||||
evas_object_color_set(en->txt_obj, 0, 0, 0, 255);
|
||||
evas_object_pass_events_set(en->txt_obj, EINA_TRUE);
|
||||
evas_object_move(en->txt_obj, x, y);
|
||||
evas_object_resize(en->txt_obj, w, h);
|
||||
evas_object_show(en->txt_obj);
|
||||
|
||||
/* Set style on textblock */
|
||||
static const char *style_buf =
|
||||
"DEFAULT='font=Sans font_size=30 color=#000 text_class=entry'"
|
||||
"newline='br'"
|
||||
"b='+ font=Sans:style=bold'";
|
||||
en->txt_style = evas_textblock_style_new();
|
||||
evas_textblock_style_set(en->txt_style, style_buf);
|
||||
evas_object_textblock_style_set(en->txt_obj, en->txt_style);
|
||||
|
||||
/* Create cursor */
|
||||
en->cursor = evas_object_textblock_cursor_new(en->txt_obj);
|
||||
|
||||
/* Create input context */
|
||||
const char* defaultContextID = ecore_imf_context_default_id_get();
|
||||
if (!defaultContextID)
|
||||
return;
|
||||
|
||||
en->imf_context = ecore_imf_context_add(defaultContextID);
|
||||
ecore_imf_context_client_window_set(en->imf_context, (void *)ecore_evas_window_get(ecore_evas_ecore_evas_get(evas)));
|
||||
ecore_imf_context_client_canvas_set(en->imf_context, evas);
|
||||
|
||||
evas_object_event_callback_add(en->rect, EVAS_CALLBACK_KEY_DOWN, _key_down_cb, en);
|
||||
evas_object_event_callback_add(en->rect, EVAS_CALLBACK_KEY_UP, _key_up_cb, en);
|
||||
evas_object_event_callback_add(en->rect, EVAS_CALLBACK_MOUSE_UP, _mouse_up_cb, en);
|
||||
evas_object_event_callback_add(en->rect, EVAS_CALLBACK_FOCUS_IN, _entry_focus_in_cb, en);
|
||||
evas_object_event_callback_add(en->rect, EVAS_CALLBACK_FOCUS_OUT, _entry_focus_out_cb, en);
|
||||
|
||||
en->have_preedit = EINA_FALSE;
|
||||
en->preedit_start = NULL;
|
||||
en->preedit_end = NULL;
|
||||
|
||||
/* register retrieve surrounding callback */
|
||||
/* This is used for autocapital or autoperiod */
|
||||
ecore_imf_context_retrieve_surrounding_callback_set(en->imf_context, _ecore_imf_retrieve_surrounding_cb, en);
|
||||
|
||||
/* register commit event callback */
|
||||
ecore_imf_context_event_callback_add(en->imf_context, ECORE_IMF_CALLBACK_COMMIT, _ecore_imf_event_commit_cb, en);
|
||||
|
||||
/* register preedit changed event handler */
|
||||
ecore_imf_context_event_callback_add(en->imf_context, ECORE_IMF_CALLBACK_PREEDIT_CHANGED, _ecore_imf_event_preedit_changed_cb, en);
|
||||
|
||||
/* register surrounding delete event callback */
|
||||
/* This is used for autocapital or autoperiod */
|
||||
ecore_imf_context_event_callback_add(en->imf_context, ECORE_IMF_CALLBACK_DELETE_SURROUNDING, _ecore_imf_event_delete_surrounding_cb, en);
|
||||
}
|
||||
|
||||
static void
|
||||
delete_input_field(Entry *en)
|
||||
{
|
||||
if (!en) return;
|
||||
|
||||
if (en->rect)
|
||||
{
|
||||
evas_object_del(en->rect);
|
||||
en->rect = NULL;
|
||||
}
|
||||
|
||||
if (en->cursor)
|
||||
{
|
||||
evas_textblock_cursor_free(en->cursor);
|
||||
en->cursor = NULL;
|
||||
}
|
||||
|
||||
if (en->preedit_start)
|
||||
{
|
||||
evas_textblock_cursor_free(en->preedit_start);
|
||||
en->preedit_start = NULL;
|
||||
}
|
||||
|
||||
if (en->preedit_end)
|
||||
{
|
||||
evas_textblock_cursor_free(en->preedit_end);
|
||||
en->preedit_end = NULL;
|
||||
}
|
||||
|
||||
if (en->txt_obj)
|
||||
{
|
||||
evas_object_del(en->txt_obj);
|
||||
en->txt_obj = NULL;
|
||||
}
|
||||
|
||||
if (en->txt_style)
|
||||
{
|
||||
evas_textblock_style_free(en->txt_style);
|
||||
en->txt_style = NULL;
|
||||
}
|
||||
|
||||
if (en->imf_context)
|
||||
{
|
||||
ecore_imf_context_del(en->imf_context);
|
||||
en->imf_context = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
int main(int argc, char *argv[])
|
||||
{
|
||||
Ecore_Evas* ee;
|
||||
Evas* evas;
|
||||
Entry en1, en2;
|
||||
|
||||
if (!ecore_evas_init()) {
|
||||
fprintf(stderr, "failed to call ecore_evas_init()\n");
|
||||
return EXIT_FAILURE;
|
||||
}
|
||||
|
||||
ecore_imf_init();
|
||||
// Create a new window, with size=480x800 and default engine
|
||||
ee = ecore_evas_new(NULL, 0, 0, 480, 800, NULL);
|
||||
|
||||
if (!ee) {
|
||||
fprintf(stderr, "something went wrong... :(\n");
|
||||
return EXIT_FAILURE;
|
||||
}
|
||||
|
||||
ecore_evas_show(ee);
|
||||
|
||||
// Get the canvas off just-created window
|
||||
evas = ecore_evas_get(ee);
|
||||
if (!evas) {
|
||||
fprintf(stderr, "something went wrong... :(\n");
|
||||
return EXIT_FAILURE;
|
||||
}
|
||||
|
||||
// Create input field rectangle
|
||||
Evas_Object* bg = evas_object_rectangle_add(evas);
|
||||
evas_object_size_hint_weight_set(bg, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
|
||||
evas_object_move(bg, 0, 0);
|
||||
evas_object_resize(bg, 480, 800);
|
||||
evas_object_color_set(bg, 255, 255, 255, 255);
|
||||
evas_object_show(bg);
|
||||
|
||||
evas_event_callback_add(evas, EVAS_CALLBACK_CANVAS_FOCUS_IN, _canvas_focus_in_cb, NULL);
|
||||
evas_event_callback_add(evas, EVAS_CALLBACK_CANVAS_FOCUS_OUT, _canvas_focus_out_cb, NULL);
|
||||
|
||||
// create input field 1
|
||||
create_input_field(evas, &en1, 40, 60, 400, 80);
|
||||
|
||||
// create input field 2
|
||||
create_input_field(evas, &en2, 40, 180, 400, 80);
|
||||
|
||||
// Give focus to input field 1
|
||||
evas_object_focus_set(en1.rect, EINA_TRUE);
|
||||
|
||||
ecore_main_loop_begin(); // begin mainloop
|
||||
|
||||
delete_input_field(&en1); // delete input field 1
|
||||
delete_input_field(&en2); // delete input field 2
|
||||
|
||||
evas_event_callback_del_full(evas, EVAS_CALLBACK_CANVAS_FOCUS_IN, _canvas_focus_in_cb, NULL);
|
||||
evas_event_callback_del_full(evas, EVAS_CALLBACK_CANVAS_FOCUS_OUT, _canvas_focus_out_cb, NULL);
|
||||
|
||||
ecore_evas_free(ee);
|
||||
|
||||
ecore_imf_shutdown();
|
||||
ecore_evas_shutdown();
|
||||
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue