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Merge branch 'gtk-fix-gesture-get-center' into 'master'

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gtkgesture: Fix gtk_gesture_get_bounding_box_center() for touchpads

Closes #2316

See merge request GNOME/gtk!1257
This commit is contained in:
Matthias Clasen 2020-01-17 21:59:33 +00:00
commit 23f84e3a3d
2 changed files with 12 additions and 2 deletions
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5
demos/gtk-demo/gestures.c
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@ -94,9 +94,12 @@ drawing_area_draw (GtkDrawingArea *area,
cairo_pattern_t *pat;
cairo_matrix_t matrix;
gdouble angle, scale;
gdouble x_center, y_center;
gtk_gesture_get_bounding_box_center (GTK_GESTURE (zoom), &x_center, &y_center);
cairo_get_matrix (cr, &matrix);
cairo_matrix_translate (&matrix, width / 2, height / 2);
cairo_matrix_translate (&matrix, x_center, y_center);
cairo_save (cr);

9
gtk/gtkgesture.c
View File

@ -1335,12 +1335,19 @@ gtk_gesture_get_bounding_box_center (GtkGesture *gesture,
gdouble *x,
gdouble *y)
{
const GdkEvent *last_event;
GdkRectangle rect;
GdkEventSequence *sequence;
g_return_val_if_fail (GTK_IS_GESTURE (gesture), FALSE);
g_return_val_if_fail (x != NULL && y != NULL, FALSE);
if (!gtk_gesture_get_bounding_box (gesture, &rect))
sequence = gtk_gesture_get_last_updated_sequence (gesture);
last_event = gtk_gesture_get_last_event (gesture, sequence);
if (EVENT_IS_TOUCHPAD_GESTURE (last_event))
return gtk_gesture_get_point (gesture, sequence, x, y);
else if (!gtk_gesture_get_bounding_box (gesture, &rect))
return FALSE;
*x = rect.x + rect.width / 2;