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gtk: Scroll events dispatch support
Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/567>
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commit
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1 changed files with 47 additions and 1 deletions
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@ -361,6 +361,51 @@ gtk_gst_base_widget_motion_event (GtkWidget * widget, GdkEventMotion * event)
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return FALSE;
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return FALSE;
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}
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}
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static gboolean
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gtk_gst_base_widget_scroll_event (GtkWidget * widget, GdkEventScroll * event)
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{
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GtkGstBaseWidget *base_widget = GTK_GST_BASE_WIDGET (widget);
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GstElement *element;
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if ((element = g_weak_ref_get (&base_widget->element))) {
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if (GST_IS_NAVIGATION (element)) {
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gdouble x, y, delta_x, delta_y;
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gtk_gst_base_widget_display_size_to_stream_size (base_widget, event->x,
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event->y, &x, &y);
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if (!gdk_event_get_scroll_deltas ((GdkEvent *) event, &delta_x, &delta_y)) {
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gdouble offset = 20;
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delta_x = event->delta_x;
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delta_y = event->delta_y;
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switch (event->direction) {
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case GDK_SCROLL_UP:
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delta_y = offset;
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break;
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case GDK_SCROLL_DOWN:
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delta_y = -offset;
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break;
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case GDK_SCROLL_LEFT:
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delta_x = -offset;
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break;
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case GDK_SCROLL_RIGHT:
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delta_x = offset;
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break;
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default:
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break;
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}
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}
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gst_navigation_send_mouse_scroll_event (GST_NAVIGATION (element),
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x, y, delta_x, delta_y);
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}
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g_object_unref (element);
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}
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return FALSE;
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}
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void
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void
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gtk_gst_base_widget_class_init (GtkGstBaseWidgetClass * klass)
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gtk_gst_base_widget_class_init (GtkGstBaseWidgetClass * klass)
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{
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{
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@ -394,6 +439,7 @@ gtk_gst_base_widget_class_init (GtkGstBaseWidgetClass * klass)
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widget_klass->button_press_event = gtk_gst_base_widget_button_event;
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widget_klass->button_press_event = gtk_gst_base_widget_button_event;
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widget_klass->button_release_event = gtk_gst_base_widget_button_event;
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widget_klass->button_release_event = gtk_gst_base_widget_button_event;
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widget_klass->motion_notify_event = gtk_gst_base_widget_motion_event;
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widget_klass->motion_notify_event = gtk_gst_base_widget_motion_event;
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widget_klass->scroll_event = gtk_gst_base_widget_scroll_event;
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GST_DEBUG_CATEGORY_INIT (gst_debug_gtk_base_widget, "gtkbasewidget", 0,
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GST_DEBUG_CATEGORY_INIT (gst_debug_gtk_base_widget, "gtkbasewidget", 0,
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"Gtk Video Base Widget");
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"Gtk Video Base Widget");
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@ -421,7 +467,7 @@ gtk_gst_base_widget_init (GtkGstBaseWidget * widget)
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| GDK_KEY_RELEASE_MASK
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| GDK_KEY_RELEASE_MASK
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| GDK_BUTTON_PRESS_MASK
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| GDK_BUTTON_PRESS_MASK
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| GDK_BUTTON_RELEASE_MASK
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| GDK_BUTTON_RELEASE_MASK
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| GDK_POINTER_MOTION_MASK | GDK_BUTTON_MOTION_MASK;
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| GDK_POINTER_MOTION_MASK | GDK_BUTTON_MOTION_MASK | GDK_SCROLL_MASK;
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gtk_widget_set_events (GTK_WIDGET (widget), event_mask);
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gtk_widget_set_events (GTK_WIDGET (widget), event_mask);
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}
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}
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