QQuickMonthGrid: fix touch support

QQuickMonthGrid lost its clicked() signal when multi-touch support was
added to QQuickControl, because QQuickControl now accepts touch events
and therefore QQuickMonthGrid no longer gets synthesized mouse events.
Re-implement QQuickControlPrivate::handlePress/Move/Release/Ungrab()
instead of QQuickControl::mouseXxxEvent() to gain multi-touch support.

Task-number: QTBUG-61585
Change-Id: Ic6fb2ea0b43b2b44beb0d8fdd3335a20f7c028f6
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>

2 files changed, 40 insertions, 39 deletions

diff --git a/src/imports/calendar/qquickmonthgrid.cpp b/src/imports/calendar/qquickmonthgrid.cpp
index 9621f49a..46b18db6 100644
--- a/src/imports/calendar/qquickmonthgrid.cpp
+++ b/src/imports/calendar/qquickmonthgrid.cpp
@@ -106,12 +106,17 @@ public:
 
     void resizeItems();
 
-    QQuickItem *cellAt(const QPoint &pos) const;
+    QQuickItem *cellAt(const QPointF &pos) const;
     QDate dateOf(QQuickItem *cell) const;
 
-    void updatePress(const QPoint &pos);
+    void updatePress(const QPointF &pos);
     void clearPress(bool clicked);
 
+    void handlePress(const QPointF &point) override;
+    void handleMove(const QPointF &point) override;
+    void handleRelease(const QPointF &point) override;
+    void handleUngrab() override;
+
     static void setContextProperty(QQuickItem *item, const QString &name, const QVariant &value);
 
     QString title;
@@ -133,11 +138,13 @@ void QQuickMonthGridPrivate::resizeItems()
     itemSize.setHeight((contentItem->height() - 5 * spacing) / 6);
 
     const auto childItems = contentItem->childItems();
-    for (QQuickItem *item : childItems)
-        item->setSize(itemSize);
+    for (QQuickItem *item : childItems) {
+        if (!QQuickItemPrivate::get(item)->isTransparentForPositioner())
+            item->setSize(itemSize);
+    }
 }
 
-QQuickItem *QQuickMonthGridPrivate::cellAt(const QPoint &pos) const
+QQuickItem *QQuickMonthGridPrivate::cellAt(const QPointF &pos) const
 {
     Q_Q(const QQuickMonthGrid);
     if (contentItem) {
@@ -154,7 +161,7 @@ QDate QQuickMonthGridPrivate::dateOf(QQuickItem *cell) const
     return QDate();
 }
 
-void QQuickMonthGridPrivate::updatePress(const QPoint &pos)
+void QQuickMonthGridPrivate::updatePress(const QPointF &pos)
 {
     Q_Q(QQuickMonthGrid);
     clearPress(false);
@@ -178,6 +185,33 @@ void QQuickMonthGridPrivate::clearPress(bool clicked)
     pressedItem = nullptr;
 }
 
+void QQuickMonthGridPrivate::handlePress(const QPointF &point)
+{
+    Q_Q(QQuickMonthGrid);
+    QQuickControlPrivate::handlePress(point);
+    updatePress(point);
+    if (pressedDate.isValid())
+        pressTimer = q->startTimer(qGuiApp->styleHints()->mousePressAndHoldInterval());
+}
+
+void QQuickMonthGridPrivate::handleMove(const QPointF &point)
+{
+    QQuickControlPrivate::handleMove(point);
+    updatePress(point);
+}
+
+void QQuickMonthGridPrivate::handleRelease(const QPointF &point)
+{
+    QQuickControlPrivate::handleRelease(point);
+    clearPress(true);
+}
+
+void QQuickMonthGridPrivate::handleUngrab()
+{
+    QQuickControlPrivate::handleUngrab();
+    clearPress(false);
+}
+
 void QQuickMonthGridPrivate::setContextProperty(QQuickItem *item, const QString &name, const QVariant &value)
 {
     QQmlContext *context = qmlContext(item);
@@ -402,35 +436,6 @@ void QQuickMonthGrid::updatePolish()
     d->resizeItems();
 }
 
-void QQuickMonthGrid::mousePressEvent(QMouseEvent *event)
-{
-    Q_D(QQuickMonthGrid);
-    d->updatePress(event->pos());
-    if (d->pressedDate.isValid())
-        d->pressTimer = startTimer(qGuiApp->styleHints()->mousePressAndHoldInterval());
-    event->accept();
-}
-
-void QQuickMonthGrid::mouseMoveEvent(QMouseEvent *event)
-{
-    Q_D(QQuickMonthGrid);
-    d->updatePress(event->pos());
-    event->accept();
-}
-
-void QQuickMonthGrid::mouseReleaseEvent(QMouseEvent *event)
-{
-    Q_D(QQuickMonthGrid);
-    d->clearPress(true);
-    event->accept();
-}
-
-void QQuickMonthGrid::mouseUngrabEvent()
-{
-    Q_D(QQuickMonthGrid);
-    d->clearPress(false);
-}
-
 void QQuickMonthGrid::timerEvent(QTimerEvent *event)
 {
     Q_D(QQuickMonthGrid);
diff --git a/src/imports/calendar/qquickmonthgrid_p.h b/src/imports/calendar/qquickmonthgrid_p.h
index 20c9c0fd..b85e0921 100644
--- a/src/imports/calendar/qquickmonthgrid_p.h
+++ b/src/imports/calendar/qquickmonthgrid_p.h
@@ -101,10 +101,6 @@ protected:
     void paddingChange(const QMarginsF &newPadding, const QMarginsF &oldPadding) override;
     void updatePolish() override;
 
-    void mousePressEvent(QMouseEvent *event) override;
-    void mouseMoveEvent(QMouseEvent *event) override;
-    void mouseReleaseEvent(QMouseEvent *event) override;
-    void mouseUngrabEvent() override;
     void timerEvent(QTimerEvent *event) override;
 
 private: