vcl/unx/gtk3/gtkinst.cxx | 47 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 47 insertions(+)
New commits:
commit 7d5841b435a6794e30f02b62db15660ffe4ee39e
Author: Povilas Kanapickas <povi...@radix.lt>
AuthorDate: Wed Dec 7 03:13:31 2022 +0200
Commit: Tomaž Vajngerl <qui...@gmail.com>
CommitDate: Wed Dec 14 13:50:05 2022 +0000
vcl: Implement touchpad zoom gesture support in GtkInstanceDrawingArea
Change-Id: I5ad68ee424fbcc45a3e56045f00ac41cf6c80195
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/143758
Tested-by: Jenkins
Reviewed-by: Tomaž Vajngerl <qui...@gmail.com>
diff --git a/vcl/unx/gtk3/gtkinst.cxx b/vcl/unx/gtk3/gtkinst.cxx
index f44240e216bc..ca08ce4d37f6 100644
--- a/vcl/unx/gtk3/gtkinst.cxx
+++ b/vcl/unx/gtk3/gtkinst.cxx
@@ -18089,6 +18089,7 @@ private:
gulong m_nPopupMenu;
gulong m_nScrollEvent;
#endif
+ GtkGesture *m_pZoomGesture;
#if GTK_CHECK_VERSION(4, 0, 0)
static void signalDraw(GtkDrawingArea*, cairo_t *cr, int /*width*/, int
/*height*/, gpointer widget)
@@ -18214,6 +18215,38 @@ private:
}
#endif
+ bool handleSignalZoom(GtkGesture* gesture, GdkEventSequence* sequence,
+ GestureEventZoomType eEventType)
+ {
+ gdouble x = 0;
+ gdouble y = 0;
+ gtk_gesture_get_point(gesture, sequence, &x, &y);
+
+ double fScaleDelta =
gtk_gesture_zoom_get_scale_delta(GTK_GESTURE_ZOOM(gesture));
+
+ CommandGestureZoomData aGestureData(x, y, eEventType, fScaleDelta);
+ CommandEvent aCEvt(Point(x, y), CommandEventId::GestureZoom, true,
&aGestureData);
+ return m_aCommandHdl.Call(aCEvt);
+ }
+
+ static bool signalZoomBegin(GtkGesture* gesture, GdkEventSequence*
sequence, gpointer widget)
+ {
+ GtkInstanceDrawingArea* pThis =
static_cast<GtkInstanceDrawingArea*>(widget);
+ return pThis->handleSignalZoom(gesture, sequence,
GestureEventZoomType::Begin);
+ }
+
+ static bool signalZoomUpdate(GtkGesture* gesture, GdkEventSequence*
sequence, gpointer widget)
+ {
+ GtkInstanceDrawingArea* pThis =
static_cast<GtkInstanceDrawingArea*>(widget);
+ return pThis->handleSignalZoom(gesture, sequence,
GestureEventZoomType::Update);
+ }
+
+ static bool signalZoomEnd(GtkGesture* gesture, GdkEventSequence* sequence,
gpointer widget)
+ {
+ GtkInstanceDrawingArea* pThis =
static_cast<GtkInstanceDrawingArea*>(widget);
+ return pThis->handleSignalZoom(gesture, sequence,
GestureEventZoomType::End);
+ }
+
#if GTK_CHECK_VERSION(4, 0, 0)
static void signalResize(GtkDrawingArea*, int nWidth, int nHeight,
gpointer widget)
{
@@ -18244,7 +18277,19 @@ public:
gtk_drawing_area_set_draw_func(m_pDrawingArea, signalDraw, this,
nullptr);
#else
m_nDrawSignalId = g_signal_connect(m_pDrawingArea, "draw",
G_CALLBACK(signalDraw), this);
+ gtk_widget_add_events(GTK_WIDGET(pDrawingArea),
GDK_TOUCHPAD_GESTURE_MASK);
#endif
+
+ ensureMouseEventWidget();
+ m_pZoomGesture = gtk_gesture_zoom_new(m_pMouseEventBox);
+
gtk_event_controller_set_propagation_phase(GTK_EVENT_CONTROLLER(m_pZoomGesture),
+ GTK_PHASE_TARGET);
+ // Note that the default zoom gesture signal handler needs to run
first to setup correct
+ // scale delta. Otherwise the first "begin" event will always contain
scale delta of infinity.
+ g_signal_connect_after(m_pZoomGesture, "begin",
G_CALLBACK(signalZoomBegin), this);
+ g_signal_connect_after(m_pZoomGesture, "update",
G_CALLBACK(signalZoomUpdate), this);
+ g_signal_connect_after(m_pZoomGesture, "end",
G_CALLBACK(signalZoomEnd), this);
+
gtk_widget_set_has_tooltip(m_pWidget, true);
g_object_set_data(G_OBJECT(m_pDrawingArea),
"g-lo-GtkInstanceDrawingArea", this);
m_xDevice->EnableRTL(get_direction());
@@ -18433,6 +18478,8 @@ public:
virtual ~GtkInstanceDrawingArea() override
{
+ g_clear_object(&m_pZoomGesture);
+
ImplGetDefaultWindow()->RemoveEventListener(LINK(this,
GtkInstanceDrawingArea, SettingsChangedHdl));
g_object_steal_data(G_OBJECT(m_pDrawingArea),
"g-lo-GtkInstanceDrawingArea");
