Add touchEvent() virtual to QWindow.

Unlike keyPressEvent(), mousePressEvent(), etc. the touch events had
no equivalent so one had to fall back to reimplementing event() or
using an event filter. This is now corrected by introducing
touchEvent(). Touch events are finally becoming a first-class citizen
in Qt 5.

Change-Id: Ia2044030154fd5b1b5384f08a3cb1749b798435f
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>

src/gui/kernel/qwindow.cpp

@@ -813,6 +813,12 @@ bool QWindow::event(QEvent *event)
         mouseDoubleClickEvent(static_cast<QMouseEvent*>(event));
         break;
 
+    case QEvent::TouchBegin:
+    case QEvent::TouchUpdate:
+    case QEvent::TouchEnd:
+        touchEvent(static_cast<QTouchEvent *>(event));
+        break;
+
     case QEvent::Move:
         moveEvent(static_cast<QMoveEvent*>(event));
         break;
@@ -907,6 +913,9 @@ void QWindow::wheelEvent(QWheelEvent *)
 }
 #endif //QT_NO_WHEELEVENT
 
+void QWindow::touchEvent(QTouchEvent *)
+{
+}
 
 
 /*!

src/gui/kernel/qwindow.h

@@ -72,6 +72,7 @@ class QMouseEvent;
 #ifndef QT_NO_WHEELEVENT
 class QWheelEvent;
 #endif
+class QTouchEvent;
 
 class QPlatformSurface;
 class QPlatformWindow;
@@ -285,6 +286,7 @@ protected:
 #ifndef QT_NO_WHEELEVENT
     virtual void wheelEvent(QWheelEvent *);
 #endif
+    virtual void touchEvent(QTouchEvent *);
 
     QWindow(QWindowPrivate &dd, QWindow *parent);
 

tests/auto/gui/kernel/qwindow/tst_qwindow.cpp

@@ -43,6 +43,8 @@
 
 #include <QtTest/QtTest>
 
+#include <QEvent>
+
 class tst_QWindow: public QObject
 {
     Q_OBJECT
@@ -51,6 +53,7 @@ private slots:
     void mapGlobal();
     void positioning();
     void isActive();
+    void testInputEvents();
 };
 
 
@@ -221,5 +224,84 @@ void tst_QWindow::isActive()
     QVERIFY(child.isActive());
 }
 
+class InputTestWindow : public QWindow
+{
+public:
+    void keyPressEvent(QKeyEvent *event) {
+        keyPressCode = event->key();
+    }
+    void keyReleaseEvent(QKeyEvent *event) {
+        keyReleaseCode = event->key();
+    }
+    void mousePressEvent(QMouseEvent *event) {
+        mousePressButton = event->button();
+    }
+    void mouseReleaseEvent(QMouseEvent *event) {
+        mouseReleaseButton = event->button();
+    }
+    void touchEvent(QTouchEvent *event) {
+        QList<QTouchEvent::TouchPoint> points = event->touchPoints();
+        for (int i = 0; i < points.count(); ++i) {
+            switch (points.at(i).state()) {
+            case Qt::TouchPointPressed:
+                ++touchPressedCount;
+                break;
+            case Qt::TouchPointReleased:
+                ++touchReleasedCount;
+                break;
+            }
+        }
+    }
+
+    InputTestWindow() {
+        keyPressCode = keyReleaseCode = 0;
+        mousePressButton = mouseReleaseButton = 0;
+        touchPressedCount = touchReleasedCount = 0;
+    }
+
+    int keyPressCode, keyReleaseCode;
+    int mousePressButton, mouseReleaseButton;
+    int touchPressedCount, touchReleasedCount;
+};
+
+void tst_QWindow::testInputEvents()
+{
+    InputTestWindow window;
+    window.setGeometry(80, 80, 40, 40);
+    window.show();
+    QTest::qWaitForWindowShown(&window);
+
+    QWindowSystemInterface::handleKeyEvent(&window, QEvent::KeyPress, Qt::Key_A, Qt::NoModifier);
+    QWindowSystemInterface::handleKeyEvent(&window, QEvent::KeyRelease, Qt::Key_A, Qt::NoModifier);
+    QCoreApplication::processEvents();
+    QCOMPARE(window.keyPressCode, int(Qt::Key_A));
+    QCOMPARE(window.keyReleaseCode, int(Qt::Key_A));
+
+    QPointF local(12, 34);
+    QWindowSystemInterface::handleMouseEvent(&window, local, local, Qt::LeftButton);
+    QWindowSystemInterface::handleMouseEvent(&window, local, local, Qt::NoButton);
+    QCoreApplication::processEvents();
+    QCOMPARE(window.mousePressButton, int(Qt::LeftButton));
+    QCOMPARE(window.mouseReleaseButton, int(Qt::LeftButton));
+
+    QTouchDevice *device = new QTouchDevice;
+    device->setType(QTouchDevice::TouchScreen);
+    QWindowSystemInterface::registerTouchDevice(device);
+    QList<QWindowSystemInterface::TouchPoint> points;
+    QWindowSystemInterface::TouchPoint tp1, tp2;
+    tp1.id = 1;
+    tp1.state = Qt::TouchPointPressed;
+    tp2.id = 2;
+    tp2.state = Qt::TouchPointPressed;
+    points << tp1 << tp2;
+    QWindowSystemInterface::handleTouchEvent(&window, device, points);
+    points[0].state = Qt::TouchPointReleased;
+    points[1].state = Qt::TouchPointReleased;
+    QWindowSystemInterface::handleTouchEvent(&window, device, points);
+    QCoreApplication::processEvents();
+    QCOMPARE(window.touchPressedCount, 2);
+    QCOMPARE(window.touchReleasedCount, 2);
+}
+
 #include <tst_qwindow.moc>
 QTEST_MAIN(tst_QWindow);