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API: add accessors for GdkEvent fields

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Add accessors for the following fields: button, keyval, keycode, scroll
direction, click count.

https://bugzilla.gnome.org/show_bug.cgi?id=657384
This commit is contained in:
Cosimo Cecchi 2011-08-28 15:26:47 -04:00
parent 5cc1318279
commit f7c188c019
4 changed files with 211 additions and 5 deletions
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9
docs/reference/gdk/gdk3-sections.txt
View File

@ -761,11 +761,16 @@ gdk_event_put
gdk_event_new
gdk_event_copy
gdk_event_free
gdk_event_get_time
gdk_event_get_state
gdk_event_get_axis
gdk_event_get_button
gdk_event_get_click_count
gdk_event_get_coords
gdk_event_get_keycode
gdk_event_get_keyval
gdk_event_get_root_coords
gdk_event_get_scroll_direction
gdk_event_get_state
gdk_event_get_time
gdk_event_request_motions
gdk_events_get_angle
gdk_events_get_center

5
gdk/gdk.symbols
View File

@ -156,10 +156,15 @@ gdk_event_copy
gdk_event_free
gdk_event_get
gdk_event_get_axis
gdk_event_get_button
gdk_event_get_click_count
gdk_event_get_coords
gdk_event_get_device
gdk_event_get_keycode
gdk_event_get_keyval
gdk_event_get_root_coords
gdk_event_get_screen
gdk_event_get_scroll_direction
gdk_event_get_source_device
gdk_event_get_state
gdk_event_get_time

186
gdk/gdkevents.c
View File

@ -949,6 +949,192 @@ gdk_event_get_root_coords (const GdkEvent *event,
return fetched;
}
/**
* gdk_event_get_button:
* @event: a #GdkEvent
* @button: (out): location to store mouse button number
*
* Extract the button number from an event.
*
* Return value: %TRUE if the event delivered a button number
*
* Since: 3.2
**/
gboolean
gdk_event_get_button (const GdkEvent *event,
guint *button)
{
gboolean fetched = TRUE;
guint number = 0;
g_return_val_if_fail (event != NULL, FALSE);
switch (event->type)
{
case GDK_BUTTON_PRESS:
case GDK_2BUTTON_PRESS:
case GDK_3BUTTON_PRESS:
case GDK_BUTTON_RELEASE:
number = event->button.button;
break;
default:
fetched = FALSE;
break;
}
if (button)
*button = number;
return fetched;
}
/**
* gdk_event_get_click_count:
* @event: a #GdkEvent
* @click_count: (out): location to store click count
*
* Extracts the click count from an event.
*
* Return value: %TRUE if the event delivered a click count
*
* Since: 3.2
*/
gboolean
gdk_event_get_click_count (const GdkEvent *event,
guint *click_count)
{
gboolean fetched = TRUE;
guint number = 0;
g_return_val_if_fail (event != NULL, FALSE);
switch (event->type)
{
case GDK_BUTTON_PRESS:
case GDK_BUTTON_RELEASE:
number = 1;
break;
case GDK_2BUTTON_PRESS:
number = 2;
break;
case GDK_3BUTTON_PRESS:
number = 3;
break;
default:
fetched = FALSE;
break;
}
if (click_count)
*click_count = number;
return fetched;
}
/**
* gdk_event_get_keyval:
* @event: a #GdkEvent
* @keyval: (out): location to store the keyval
*
* Extracts the keyval from an event.
*
* Return value: %TRUE if the event delivered a key symbol
*
* Since: 3.2
*/
gboolean
gdk_event_get_keyval (const GdkEvent *event,
guint *keyval)
{
gboolean fetched = TRUE;
guint number = 0;
switch (event->type)
{
case GDK_KEY_PRESS:
case GDK_KEY_RELEASE:
number = event->key.keyval;
break;
default:
fetched = FALSE;
break;
}
if (keyval)
*keyval = number;
return fetched;
}
/**
* gdk_event_get_keycode:
* @event: a #GdkEvent
* @keycode: (out): location to store the keycode
*
* Extracts the hardware keycode from an event.
*
* Return value: %TRUE if the event delivered a hardware keycode
*
* Since: 3.2
*/
gboolean
gdk_event_get_keycode (const GdkEvent *event,
guint16 *keycode)
{
gboolean fetched = TRUE;
guint16 number = 0;
switch (event->type)
{
case GDK_KEY_PRESS:
case GDK_KEY_RELEASE:
number = event->key.hardware_keycode;
break;
default:
fetched = FALSE;
break;
}
if (keycode)
*keycode = number;
return fetched;
}
/**
* gdk_event_get_scroll_direction:
* @event: a #GdkEvent
* @direction: (out): location to store the scroll direction
*
* Extracts the scroll direction from an event.
*
* Return value: %TRUE if the event delivered a scroll direction
*
* Since: 3.2
*/
gboolean
gdk_event_get_scroll_direction (const GdkEvent *event,
GdkScrollDirection *direction)
{
gboolean fetched = TRUE;
GdkScrollDirection dir = 0;
switch (event->type)
{
case GDK_SCROLL:
dir = event->scroll.direction;
break;
default:
fetched = FALSE;
break;
}
if (direction)
*direction = dir;
return fetched;
}
/**
* gdk_event_get_axis:
* @event: a #GdkEvent

16
gdk/gdkevents.h
View File

@ -1054,9 +1054,19 @@ gboolean gdk_event_get_state (const GdkEvent *event,
gboolean gdk_event_get_coords (const GdkEvent *event,
gdouble *x_win,
gdouble *y_win);
gboolean gdk_event_get_root_coords (const GdkEvent *event,
gdouble *x_root,
gdouble *y_root);
gboolean gdk_event_get_root_coords (const GdkEvent *event,
gdouble *x_root,
gdouble *y_root);
gboolean gdk_event_get_button (const GdkEvent *event,
guint *button);
gboolean gdk_event_get_click_count (const GdkEvent *event,
guint *click_count);
gboolean gdk_event_get_keyval (const GdkEvent *event,
guint *keyval);
gboolean gdk_event_get_keycode (const GdkEvent *event,
guint16 *keycode);
gboolean gdk_event_get_scroll_direction (const GdkEvent *event,
GdkScrollDirection *direction);
gboolean gdk_event_get_axis (const GdkEvent *event,
GdkAxisUse axis_use,
gdouble *value);