From 45c0133e44fc40b2c304b49a46c9453d268d264b Mon Sep 17 00:00:00 2001
From: Zeno Albisser <zeno.albisser@nokia.com>
Date: Thu, 3 Feb 2011 16:52:10 +0100
Subject: made TouchArea work on top of flickable

---
 TouchArea/qdeclarativetoucharea.cpp | 98 +++++++++++++++++++++++++++++++++----
 TouchArea/qdeclarativetoucharea.h   |  9 ++++
 2 files changed, 97 insertions(+), 10 deletions(-)

diff --git a/TouchArea/qdeclarativetoucharea.cpp b/TouchArea/qdeclarativetoucharea.cpp
index a5797e5..4295ffa 100644
--- a/TouchArea/qdeclarativetoucharea.cpp
+++ b/TouchArea/qdeclarativetoucharea.cpp
@@ -41,8 +41,11 @@
 
 
 #include "qdeclarativetoucharea.h"
-#include "qevent.h"
-#include "qsharedpointer.h"
+#include <QEvent>
+#include <QGraphicsScene>
+#include <QGraphicsSceneMouseEvent>
+#include <QDeclarativeExpression>
+#include <QDeclarativeInfo>
 #include <math.h>
 
 QDeclarativeTouchArea::QDeclarativeTouchArea(QDeclarativeItem *parent)
@@ -52,7 +55,8 @@ QDeclarativeTouchArea::QDeclarativeTouchArea(QDeclarativeItem *parent)
       _scaleFactor(1.0),
       _rotationAngle(0.0),
       _parentTouchArea(this),
-      _active(false)
+      _active(false),
+      _stealMouse(false)
 {
     setAcceptTouchEvents(true);
     setAcceptedMouseButtons(Qt::LeftButton);
@@ -72,6 +76,7 @@ QDeclarativeTouchArea::~QDeclarativeTouchArea() {
 }
 
 bool QDeclarativeTouchArea::sceneEvent(QEvent *event) {
+    bool rv = false;
     switch (event->type()) {
     case QEvent::TouchBegin:
         updateTopTouchArea();
@@ -80,17 +85,17 @@ bool QDeclarativeTouchArea::sceneEvent(QEvent *event) {
                 _active = true;
                 _parentTouchArea->_active = true;
                 updateTouchData(event);
-                return true;
+                rv = true;
             }
-        }
-        else {
+        } else {
             updateTouchData(event);
-            return true;
+            rv = true;
         }
         break;
     case QEvent::TouchUpdate:
         updateTouchData(event);
-        return true;
+        rv = true;
+        break;
     case QEvent::TouchEnd: {
         updateTouchData(event);
         if (_parentTouchArea != this) {
@@ -99,12 +104,19 @@ bool QDeclarativeTouchArea::sceneEvent(QEvent *event) {
                 _parentTouchArea->_active = false;
             }
         }
-        return true;
+        rv = true;
+        break;
     }
     default:
         break;
     }
-    return QDeclarativeItem::sceneEvent(event);
+
+    if(!rv)
+        rv = QDeclarativeItem::sceneEvent(event);
+    if (event->type() == QEvent::UngrabMouse) {
+        setKeepMouseGrab(false);
+    }
+    return rv;
 }
 
 void QDeclarativeTouchArea::updateTouchData(QEvent *event) {
@@ -112,6 +124,24 @@ void QDeclarativeTouchArea::updateTouchData(QEvent *event) {
     bool moved = false;
     bool started = false;
 
+    QDeclarativeItem *grabber = scene() ? qobject_cast<QDeclarativeItem*>(scene()->mouseGrabberItem()) : 0;
+    QDeclarativeTouchArea *touchGrabber = scene() ? qobject_cast<QDeclarativeTouchArea*>(scene()->mouseGrabberItem()) : 0;
+    if (grabber == this || !grabber || !grabber->keepMouseGrab() || touchGrabber) {
+        if (_stealMouse && (grabber != this || !grabber->keepMouseGrab())) {
+            grabMouse();
+            setKeepMouseGrab(true);
+        }
+
+        if (!_keepMouseFocus.script().isEmpty()) {
+            QDeclarativeExpression expr(_keepMouseFocus.context(), _keepMouseFocus.scopeObject(), _keepMouseFocus.script());
+            QVariant result = expr.evaluate();
+            if (expr.hasError())
+                qmlInfo(this) << expr.error();
+            else
+                _stealMouse = true;
+        }
+    }
+
     QTouchEvent *e = static_cast<QTouchEvent*>(event);
     clearChangedAndReleasedTouches();
 
@@ -216,3 +246,51 @@ void QDeclarativeTouchArea::updatePinch(QList<QTouchEvent::TouchPoint> *touchPoi
 
 }
 
+bool QDeclarativeTouchArea::event(QEvent *event)
+{
+    switch (event->type()) {
+    case QEvent::TouchBegin:
+    case QEvent::TouchUpdate: {
+            updateTouchData(event);
+        }
+        return true;
+    case QEvent::TouchEnd: {
+            updateTouchData(event);
+            _stealMouse = false;
+            QDeclarativeTouchArea *touchGrabber = scene() ? qobject_cast<QDeclarativeTouchArea*>(scene()->mouseGrabberItem()) : 0;
+            if (touchGrabber == this)
+                ungrabMouse();
+            setKeepMouseGrab(false);
+        }
+        return true;
+    default:
+        return QDeclarativeItem::event(event);
+    }
+
+    return QDeclarativeItem::event(event);
+}
+
+bool QDeclarativeTouchArea::sceneEventFilter(QGraphicsItem *i, QEvent *event)
+{
+    if (!isVisible())
+        return QDeclarativeItem::sceneEventFilter(i, event);
+    switch (event->type()) {
+    case QEvent::TouchBegin:
+    case QEvent::TouchUpdate:
+            updateTouchData(event);
+        return true;
+    case QEvent::TouchEnd: {
+            updateTouchData(event);
+            _stealMouse = false;
+            QDeclarativeTouchArea *touchGrabber = scene() ? qobject_cast<QDeclarativeTouchArea*>(scene()->mouseGrabberItem()) : 0;
+            if (touchGrabber == this)
+                ungrabMouse();
+            setKeepMouseGrab(false);
+        }
+        return true;
+    default:
+        break;
+    }
+    return QDeclarativeItem::sceneEventFilter(i, event);
+}
+
diff --git a/TouchArea/qdeclarativetoucharea.h b/TouchArea/qdeclarativetoucharea.h
index f9525e3..9648ece 100644
--- a/TouchArea/qdeclarativetoucharea.h
+++ b/TouchArea/qdeclarativetoucharea.h
@@ -48,6 +48,7 @@
 
 #include <QMap>
 #include <QList>
+#include <QDeclarativeScriptString>
 
 class QDeclarativeTouchPoint : public QObject {
     Q_OBJECT
@@ -133,6 +134,7 @@ class QDeclarativeTouchArea : public QDeclarativeItem
     Q_PROPERTY(int maximumTouches READ maximumTouches WRITE setMaximumTouches)
     Q_PROPERTY(qreal scaleFactor READ scaleFactor NOTIFY scaleFactorChanged)
     Q_PROPERTY(qreal rotationAngle READ rotationAngle NOTIFY rotationAngleChanged)
+    Q_PROPERTY(QDeclarativeScriptString keepMouseFocus READ keepMouseFocus WRITE setKeepMouseFocus)
 
 public:
     QDeclarativeTouchArea(QDeclarativeItem *parent=0);
@@ -146,6 +148,9 @@ public:
     qreal scaleFactor() const { return _scaleFactor; }
     qreal rotationAngle() const { return _rotationAngle; }
 
+    QDeclarativeScriptString keepMouseFocus() const { return _keepMouseFocus; }
+    void setKeepMouseFocus(const QDeclarativeScriptString &keep) { _keepMouseFocus = keep; }
+
     QList<QObject*> touches() { return _touches.values(); }
     QList<QObject*> changedTouches() { return _changedTouches.values(); }
 
@@ -186,6 +191,8 @@ protected:
     void clearChangedAndReleasedTouches();
     void updateTopTouchArea();
     void updateTouchData(QEvent*);
+    bool event(QEvent *event);
+    bool sceneEventFilter(QGraphicsItem *i, QEvent *event);
 
 private:
     QMap<int,QObject*> _touchPrototypes;
@@ -198,6 +205,8 @@ private:
     qreal _rotationAngle;
     QDeclarativeTouchArea* _parentTouchArea;
     bool _active;
+    bool _stealMouse;
+    QDeclarativeScriptString _keepMouseFocus;
 
 };
 
-- 
cgit v1.2.3