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Add extra checks for GdkDevice functions that might fail on slave devices.

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Documentation bits have been added as well.
This commit is contained in:
Carlos Garnacho 2011-01-24 02:38:12 +01:00
parent 5fd5872b37
commit 94c4a312c1
1 changed files with 20 additions and 2 deletions
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22
gdk/gdkdevice.c
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@ -384,7 +384,10 @@ gdk_device_get_property (GObject *object,
* or %NULL.
* @mask: location to store the modifiers, or %NULL.
*
* Gets the current state of a pointer device relative to @window.
* Gets the current state of a pointer device relative to @window. As a slave
* device coordinates are those of its master pointer, This
* function may not be called on devices of type %GDK_DEVICE_TYPE_SLAVE,
* unless there is an ongoing grab on them, see gdk_device_grab().
*/
void
gdk_device_get_state (GdkDevice *device,
@ -395,6 +398,8 @@ gdk_device_get_state (GdkDevice *device,
g_return_if_fail (GDK_IS_DEVICE (device));
g_return_if_fail (gdk_device_get_source (device) != GDK_SOURCE_KEYBOARD);
g_return_if_fail (GDK_IS_WINDOW (window));
g_return_if_fail (gdk_device_get_device_type (device) != GDK_DEVICE_TYPE_SLAVE ||
gdk_display_device_is_grabbed (gdk_device_get_display (device), device));
if (GDK_DEVICE_GET_CLASS (device)->get_state)
GDK_DEVICE_GET_CLASS (device)->get_state (device, window, axes, mask);
@ -408,7 +413,10 @@ gdk_device_get_state (GdkDevice *device,
* @x: (out) (allow-none): location to store root window X coordinate of @device, or %NULL.
* @y: (out) (allow-none): location to store root window Y coordinate of @device, or %NULL.
*
* Gets the current location of @device.
* Gets the current location of @device. As a slave device
* coordinates are those of its master pointer, This function
* may not be called on devices of type %GDK_DEVICE_TYPE_SLAVE,
* unless there is an ongoing grab on them, see gdk_device_grab().
*
* Since: 3.0
**/
@ -427,6 +435,10 @@ gdk_device_get_position (GdkDevice *device,
g_return_if_fail (gdk_device_get_source (device) != GDK_SOURCE_KEYBOARD);
display = gdk_device_get_display (device);
g_return_if_fail (gdk_device_get_device_type (device) != GDK_DEVICE_TYPE_SLAVE ||
gdk_display_device_is_grabbed (display, device));
default_screen = gdk_display_get_default_screen (display);
_gdk_device_query_state (device,
@ -454,6 +466,10 @@ gdk_device_get_position (GdkDevice *device,
* Obtains the window underneath @device, returning the location of the device in @win_x and @win_y. Returns
* %NULL if the window tree under @device is not known to GDK (for example, belongs to another application).
*
* As a slave device coordinates are those of its master pointer, This
* function may not be called on devices of type %GDK_DEVICE_TYPE_SLAVE,
* unless there is an ongoing grab on them, see gdk_device_grab().
*
* Returns: (transfer none): the #GdkWindow under the device position, or %NULL.
*
* Since: 3.0
@ -468,6 +484,8 @@ gdk_device_get_window_at_position (GdkDevice *device,
g_return_val_if_fail (GDK_IS_DEVICE (device), NULL);
g_return_val_if_fail (gdk_device_get_source (device) != GDK_SOURCE_KEYBOARD, NULL);
g_return_val_if_fail (gdk_device_get_device_type (device) != GDK_DEVICE_TYPE_SLAVE ||
gdk_display_device_is_grabbed (gdk_device_get_display (device), device), NULL);
window = _gdk_device_window_at_position (device, &tmp_x, &tmp_y, NULL, FALSE);