SwipeDelegate: don't emit clicked when released outside

If there are no delegates and hence the mouse hasn't been grabbed, we
should clear the pressed state when the mouse is dragged outside the
control. We can do so by falling back to the event handling of the
base class (QQuickItemDelegate) when we have no delegates.
This also ensures that the canceled() signal is emitted.

A similar thing is done for controls with delegates, except that only
the vertical position of the mouse is checked, as we still want to
initiate swipes horizontally.

Change-Id: I7738f5b9e8e8b6ce4a733008fa4ff73596e854ea
Task-number: QTBUG-56312
Task-number: QTBUG-57285
Reviewed-by: J-P Nurmi <jpnurmi@qt.io>

1 files changed, 76 insertions, 0 deletions

diff --git a/src/quicktemplates2/qquickswipedelegate_p_p.h b/src/quicktemplates2/qquickswipedelegate_p_p.h
new file mode 100644
index 00000000..0387ad70
--- /dev/null
+++ b/src/quicktemplates2/qquickswipedelegate_p_p.h
@@ -0,0 +1,76 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Quick Templates 2 module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QQUICKSWIPEDELEGATE_P_P_H
+#define QQUICKSWIPEDELEGATE_P_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtQuickTemplates2/private/qquickitemdelegate_p_p.h>
+#include <QtQuickTemplates2/private/qquickswipe_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class QQuickSwipeDelegate;
+
+class QQuickSwipeDelegatePrivate : public QQuickItemDelegatePrivate
+{
+    Q_DECLARE_PUBLIC(QQuickSwipeDelegate)
+
+public:
+    QQuickSwipeDelegatePrivate(QQuickSwipeDelegate *control);
+
+    bool handleMousePressEvent(QQuickItem *item, QMouseEvent *event);
+    bool handleMouseMoveEvent(QQuickItem *item, QMouseEvent *event);
+    bool handleMouseReleaseEvent(QQuickItem *item, QMouseEvent *event);
+
+    void resizeContent() override;
+
+    QQuickSwipe swipe;
+};
+
+QT_END_NAMESPACE
+
+#endif // QQUICKSWIPEDELEGATE_P_P_H