diff options
author | Shawn Rutledge <shawn.rutledge@qt.io> | 2016-07-18 14:22:15 +0200 |
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committer | Shawn Rutledge <shawn.rutledge@qt.io> | 2016-08-26 13:05:35 +0000 |
commit | 124181973f586a67990c9a68e25a3642623b998a (patch) | |
tree | 616e9fa5ac357fafb0eaeda96e2d6a9eb10f72c5 /src/quick/handlers/qquickdraghandler_p.h | |
parent | 524686cf13aa5647eae4ebb630d58396862027e5 (diff) |
Introduce DragHandler
A handler for dragging Items around by touch or mouse.
Change-Id: Id83fea568095eb6374f3f1abc6f550d81f3731df
Reviewed-by: Jan Arve Sæther <jan-arve.saether@theqtcompany.com>
Diffstat (limited to 'src/quick/handlers/qquickdraghandler_p.h')
-rw-r--r-- | src/quick/handlers/qquickdraghandler_p.h | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/src/quick/handlers/qquickdraghandler_p.h b/src/quick/handlers/qquickdraghandler_p.h new file mode 100644 index 0000000000..0ce03c2c4c --- /dev/null +++ b/src/quick/handlers/qquickdraghandler_p.h @@ -0,0 +1,130 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtQuick module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** 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 https://www.qt.io/terms-conditions. For further +** information use the contact form at https://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.LGPL3 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-3.0.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 (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QQUICKDRAGHANDLER_H +#define QQUICKDRAGHANDLER_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 "qquickpointersinglehandler_p.h" + +QT_BEGIN_NAMESPACE + +class Q_AUTOTEST_EXPORT QQuickDragAxis : public QObject +{ + Q_OBJECT + Q_PROPERTY(qreal minimum READ minimum WRITE setMinimum NOTIFY minimumChanged) + Q_PROPERTY(qreal maximum READ maximum WRITE setMaximum NOTIFY maximumChanged) + Q_PROPERTY(bool enabled READ enabled WRITE setEnabled NOTIFY enabledChanged) + +public: + QQuickDragAxis(); + + qreal minimum() const { return m_minimum; } + void setMinimum(qreal minimum); + + qreal maximum() const { return m_maximum; } + void setMaximum(qreal maximum); + + bool enabled() const { return m_enabled; } + void setEnabled(bool enabled); + +signals: + void minimumChanged(); + void maximumChanged(); + void enabledChanged(); + +private: + qreal m_minimum; + qreal m_maximum; + bool m_enabled; +}; + +class Q_AUTOTEST_EXPORT QQuickDragHandler : public QQuickPointerSingleHandler +{ + Q_OBJECT + Q_PROPERTY(QQuickDragAxis * xAxis READ xAxis CONSTANT) + Q_PROPERTY(QQuickDragAxis * yAxis READ yAxis CONSTANT) + Q_PROPERTY(bool dragging READ dragging NOTIFY draggingChanged) + +public: + QQuickDragHandler(QObject *parent = 0); + ~QQuickDragHandler(); + + void handleEventPoint(QQuickEventPoint *point) Q_DECL_OVERRIDE; + + QQuickDragAxis *xAxis() { return &m_xAxis; } + QQuickDragAxis *yAxis() { return &m_yAxis; } + + bool dragging() const { return m_dragging; } + + Q_INVOKABLE void enforceConstraints(); + +Q_SIGNALS: +// void gestureStarted(QQuickGestureEvent *gesture); + void draggingChanged(); + +private: + void ungrab(); + void enforceAxisConstraints(QPointF *localPos); + +private: + bool m_dragging; + QPointF m_startPos; + QQuickDragAxis m_xAxis; + QQuickDragAxis m_yAxis; + + friend class QQuickDragAxis; +}; + +QT_END_NAMESPACE + +QML_DECLARE_TYPE(QQuickDragHandler) +QML_DECLARE_TYPE(QQuickDragAxis) + +#endif // QQUICKDRAGHANDLER_H |