Label example

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Label example

In this example we are going to create 6 labels, set some properties on them and see what changes in appearance those properties cause.

We start with the setup code that by now you should be familiar with:

//Compile with:
//gcc -o label_example_01 label_example_01.c -g `pkg-config --cflags --libs elementary`
#include <Elementary.h>
EAPI_MAIN int
elm_main(int argc EINA_UNUSED, char **argv EINA_UNUSED)
{
Evas_Object *win, *label, *label2, *label3, *label4, *label5, *label6;
elm_policy_set(ELM_POLICY_QUIT, ELM_POLICY_QUIT_LAST_WINDOW_CLOSED);
win = elm_win_util_standard_add("label", "Label");
elm_win_autodel_set(win, EINA_TRUE);
EINA_TRUE
#define EINA_TRUE
boolean value TRUE (numerical value 1)
Definition: eina_types.h:539
EINA_UNUSED
#define EINA_UNUSED
Used to indicate that a function parameter is purposely unused.
Definition: eina_types.h:339
elm_policy_set
Eina_Bool elm_policy_set(unsigned int policy, int value)
Set a new policy's value (for a given policy group/identifier).
Definition: elm_main.c:1380
ELM_POLICY_QUIT_LAST_WINDOW_CLOSED
@ ELM_POLICY_QUIT_LAST_WINDOW_CLOSED
quit when the application's last window is closed
Definition: elm_general.h:248
ELM_POLICY_QUIT
@ ELM_POLICY_QUIT
under which circumstances the application should quit automatically.
Definition: elm_general.h:227
elm_win_util_standard_add
Evas_Object * elm_win_util_standard_add(const char *name, const char *title)
Adds a window object with standard setup.
Definition: efl_ui_win.c:9582
elm_win_autodel_set
void elm_win_autodel_set(Eo *obj, Eina_Bool autodel)
Set the window's autodel state.
Definition: efl_ui_win.c:6194
Evas_Object
Efl_Canvas_Object Evas_Object
An Evas Object handle.
Definition: Evas_Common.h:185

For our first label we have a moderately long text(that doesn't fit in the label's width) so we will make it a sliding label. Since the text isn't too long we don't need the animation to be very long, 3 seconds should give us a nice speed:

label = elm_label_add(win);
elm_object_text_set(label, "Some long text for our label, that is long but "
"not too long.");
elm_label_slide_duration_set(label, 3);
elm_label_slide_mode_set(label, ELM_LABEL_SLIDE_MODE_ALWAYS);
elm_object_style_set(label, "slide_bounce");
evas_object_move(label, 0, 10);
evas_object_resize(label, 200, 15);
evas_object_show(label);
elm_label_add
Evas_Object * elm_label_add(Evas_Object *parent)
Add a new label to the parent.
Definition: elm_label.c:421
elm_label_slide_duration_set
void elm_label_slide_duration_set(Elm_Label *obj, double duration)
Control the slide duration of the label.
Definition: elm_label_eo.legacy.c:39
elm_label_slide_mode_set
void elm_label_slide_mode_set(Elm_Label *obj, Elm_Label_Slide_Mode mode)
Control the slide mode of the label widget.
Definition: elm_label_eo.legacy.c:27
ELM_LABEL_SLIDE_MODE_ALWAYS
@ ELM_LABEL_SLIDE_MODE_ALWAYS
Slide always.
Definition: elm_label_eo.h:23
elm_object_style_set
Eina_Bool elm_object_style_set(Evas_Object *obj, const char *style)
Set the style to used by a given widget.
Definition: elm_main.c:1583
evas_object_show
EVAS_API void evas_object_show(Evas_Object *eo_obj)
Makes the given Evas object visible.
Definition: evas_object_main.c:1814
evas_object_move
EVAS_API void evas_object_move(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
Move the given Evas object to the given location inside its canvas' viewport.
Definition: evas_object_main.c:1171
evas_object_resize
EVAS_API void evas_object_resize(Evas_Object *obj, Evas_Coord w, Evas_Coord h)
Changes the size of the given Evas object.
Definition: evas_object_main.c:1236

For our second label we have the same text, but this time we aren't going to have it slide, we're going to ellipsize it. Because we ask our label widget to ellipsize the text it will first diminsh the fontsize so that it can show as much of the text as possible:

label2 = elm_label_add(win);
elm_object_text_set(label2, "This is the text for our second label, which is"
" much longer than the previous one, maybe even "
"too long, but maybe not.");
elm_label_ellipsis_set(label2, EINA_TRUE);
evas_object_resize(label2, 200, 15);
evas_object_move(label2, 0, 30);
evas_object_show(label2);
elm_label_ellipsis_set
void elm_label_ellipsis_set(Elm_Label *obj, Eina_Bool ellipsis)
Control the ellipsis behavior of the label.
Definition: elm_label_eo.legacy.c:63

For the third label we are going to ellipsize the text again, however this time to make sure the fontsize isn't diminshed we will set a line wrap. The wrap won't actually cause a line break because we set the label to ellipsize:

label3 = elm_label_add(win);
elm_object_text_set(label3, "Some more long text much as before, long but "
"not too long.");
elm_label_line_wrap_set(label3, ELM_WRAP_CHAR);
elm_label_ellipsis_set(label3, EINA_TRUE);
evas_object_resize(label3, 200, 15);
evas_object_move(label3, 0, 50);
evas_object_show(label3);
ELM_WRAP_CHAR
@ ELM_WRAP_CHAR
Char wrap - wrap between characters.
Definition: elm_general.h:313
elm_label_line_wrap_set
void elm_label_line_wrap_set(Elm_Label *obj, Elm_Wrap_Type wrap)
Control the wrapping behavior of the label.
Definition: elm_label_eo.legacy.c:51

For our fourth label we will set line wrapping but won't set ellipsis, so that our text will indeed be wrapped instead of ellipsized. For this label we choose character wrap:

label4 = elm_label_add(win);
elm_object_text_set(label4, "And for this label we choose a different text, "
"for no reason other than that we can.");
elm_label_line_wrap_set(label4, ELM_WRAP_CHAR);
evas_object_resize(label4, 200, 30);
evas_object_move(label4, 0, 80);
evas_object_show(label4);

Just two more, for our fifth label we do the same as for the fourth except we set the wrap to word:

label5 = elm_label_add(win);
elm_object_text_set(label5, "And for this label we choose a different text, "
"for no reason other than that we can.");
elm_label_line_wrap_set(label5, ELM_WRAP_WORD);
evas_object_resize(label5, 200, 40);
evas_object_move(label5, 0, 110);
evas_object_show(label5);
ELM_WRAP_WORD
@ ELM_WRAP_WORD
Word wrap - wrap in allowed wrapping points (as defined in the unicode standard).
Definition: elm_general.h:314

And last but not least for our sixth label we set the style to "marker" and the color to red (the default color is white which would be hard to see on our white background):

label6 = elm_label_add(win);
elm_object_text_set(label6, "Short text");
elm_object_style_set(label6, "marker");
evas_object_color_set(label6, 255, 0, 0, 255);
evas_object_resize(label6, 200, 15);
evas_object_move(label6, 0, 140);
evas_object_show(label6);
evas_object_color_set
EVAS_API void evas_object_color_set(Evas_Object *obj, int r, int g, int b, int a)
Sets the general/main color of the given Evas object to the given one.
Definition: evas_object_main.c:2024

Our example will look like this: