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gtk: Add touch event support

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Add a handler for touch events to gtkbasewidget.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1633>
This commit is contained in:
Vivienne Watermeier 2022-02-21 20:16:06 +01:00 committed by GStreamer Marge Bot
parent e6b187032b
commit 59199a0131
1 changed files with 53 additions and 1 deletions
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54
subprojects/gst-plugins-good/ext/gtk/gtkgstbasewidget.c
View file

@ -23,6 +23,7 @@
#endif
#include <stdio.h>
#include <math.h>
#include "gtkgstbasewidget.h"
@ -453,6 +454,55 @@ gtk_gst_base_widget_scroll_event (GtkWidget * widget, GdkEventScroll * event)
return FALSE;
}
static gboolean
gtk_gst_base_widget_touch_event (GtkWidget * widget, GdkEventTouch * event)
{
GtkGstBaseWidget *base_widget = GTK_GST_BASE_WIDGET (widget);
GstElement *element;
if ((element = g_weak_ref_get (&base_widget->element))) {
if (GST_IS_NAVIGATION (element)) {
GstEvent *nav_event;
gdouble x, y, p;
guint id, i;
id = GPOINTER_TO_UINT (event->sequence);
gtk_gst_base_widget_display_size_to_stream_size (base_widget, event->x,
event->y, &x, &y);
p = NAN;
for (i = 0; i < gdk_device_get_n_axes (event->device); i++) {
if (gdk_device_get_axis_use (event->device, i) == GDK_AXIS_PRESSURE) {
p = event->axes[i];
break;
}
}
switch (event->type) {
case GDK_TOUCH_BEGIN:
nav_event = gst_navigation_event_new_touch_down (id, x, y, p);
break;
case GDK_TOUCH_UPDATE:
nav_event = gst_navigation_event_new_touch_motion (id, x, y, p);
break;
case GDK_TOUCH_END:
case GDK_TOUCH_CANCEL:
nav_event = gst_navigation_event_new_touch_up (id, x, y);
break;
default:
nav_event = NULL;
break;
}
if (nav_event)
gst_navigation_send_event_simple (GST_NAVIGATION (element), nav_event);
}
g_object_unref (element);
}
return FALSE;
}
void
gtk_gst_base_widget_class_init (GtkGstBaseWidgetClass * klass)
@ -500,6 +550,7 @@ gtk_gst_base_widget_class_init (GtkGstBaseWidgetClass * klass)
widget_klass->button_release_event = gtk_gst_base_widget_button_event;
widget_klass->motion_notify_event = gtk_gst_base_widget_motion_event;
widget_klass->scroll_event = gtk_gst_base_widget_scroll_event;
widget_klass->touch_event = gtk_gst_base_widget_touch_event;
GST_DEBUG_CATEGORY_INIT (gst_debug_gtk_base_widget, "gtkbasewidget", 0,
"Gtk Video Base Widget");
@ -529,7 +580,8 @@ gtk_gst_base_widget_init (GtkGstBaseWidget * widget)
| GDK_KEY_RELEASE_MASK
| GDK_BUTTON_PRESS_MASK
| GDK_BUTTON_RELEASE_MASK
| GDK_POINTER_MOTION_MASK | GDK_BUTTON_MOTION_MASK | GDK_SCROLL_MASK;
| GDK_POINTER_MOTION_MASK | GDK_BUTTON_MOTION_MASK | GDK_SCROLL_MASK
| GDK_TOUCH_MASK;
gtk_widget_set_events (GTK_WIDGET (widget), event_mask);
}