Rearranged the gesture code a bit for future native gestures on Windows.

Moved the code that subscribes to native gestures on Windows to a private
function in QWidget which will check which gestures the widget is subscribed to
and enable native gestures as requested.

Reviewed-by: trustme

1 files changed, 50 insertions, 0 deletions

diff --git a/src/gui/kernel/qwidget_win.cpp b/src/gui/kernel/qwidget_win.cpp
index b11b661d8e..ce853d2242 100644
--- a/src/gui/kernel/qwidget_win.cpp
+++ b/src/gui/kernel/qwidget_win.cpp
@@ -56,6 +56,10 @@
 #include "private/qbackingstore_p.h"
 #include "private/qwindowsurface_raster_p.h"
 
+#include "qscrollbar.h"
+#include "qabstractscrollarea.h"
+#include <private/qabstractscrollarea_p.h>
+
 #include <qdebug.h>
 
 #include <private/qapplication_p.h>
@@ -2049,6 +2053,52 @@ void QWidgetPrivate::registerTouchWindow()
         QApplicationPrivate::RegisterTouchWindow(q->effectiveWinId(), 0);
 }
 
+void QWidgetPrivate::winSetupGestures()
+{
+    Q_Q(QWidget);
+    QApplicationPrivate *qAppPriv = getQApplicationPrivateInternal();
+    bool needh = false;
+    bool needv = false;
+    bool singleFingerPanEnabled = false;
+    QStandardGestures gestures = qAppPriv->widgetGestures[q];
+    WId winid = 0;
+
+    if (QAbstractScrollArea *asa = qobject_cast<QAbstractScrollArea*>(q)) {
+        winid = asa->viewport()->winId();
+        QScrollBar *hbar = asa->horizontalScrollBar();
+        QScrollBar *vbar = asa->verticalScrollBar();
+        Qt::ScrollBarPolicy hbarpolicy = asa->horizontalScrollBarPolicy();
+        Qt::ScrollBarPolicy vbarpolicy = asa->verticalScrollBarPolicy();
+        needh = (hbarpolicy == Qt::ScrollBarAlwaysOn
+                 || (hbarpolicy == Qt::ScrollBarAsNeeded && hbar->minimum() < hbar->maximum()));
+        needv = (vbarpolicy == Qt::ScrollBarAlwaysOn
+                 || (vbarpolicy == Qt::ScrollBarAsNeeded && vbar->minimum() < vbar->maximum()));
+        singleFingerPanEnabled = asa->d_func()->singleFingerPanEnabled;
+    }
+    if (qAppPriv->SetGestureConfig) {
+        GESTURECONFIG gc[2];
+        gc[0].dwID = GID_PAN;
+        if (gestures.pan || needh || needv) {
+            gc[0].dwWant = GC_PAN;
+            gc[0].dwBlock = 0;
+            if (needv && singleFingerPanEnabled)
+                gc[0].dwWant |= GC_PAN_WITH_SINGLE_FINGER_VERTICALLY;
+            if (needh && singleFingerPanEnabled)
+                gc[0].dwWant |= GC_PAN_WITH_SINGLE_FINGER_HORIZONTALLY;
+        } else {
+            gc[0].dwWant = 0;
+            gc[0].dwBlock = GC_PAN;
+        }
+
+        gc[1].dwID = GID_ZOOM;
+        if (gestures.pinch) {
+            gc[1].dwWant = GC_ZOOM;
+            gc[1].dwBlock = 0;
+        }
+        qAppPriv->SetGestureConfig(winid, 0, sizeof(gc)/sizeof(gc[0]), gc, sizeof(gc[0]));
+    }
+}
+
 QT_END_NAMESPACE
 
 #ifdef Q_WS_WINCE