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Diffstat (limited to 'src/templates/qquickpressandholdhelper.cpp')
-rw-r--r-- | src/templates/qquickpressandholdhelper.cpp | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/src/templates/qquickpressandholdhelper.cpp b/src/templates/qquickpressandholdhelper.cpp new file mode 100644 index 00000000..38cd871c --- /dev/null +++ b/src/templates/qquickpressandholdhelper.cpp @@ -0,0 +1,114 @@ +/**************************************************************************** +** +** Copyright (C) 2015 The Qt Company Ltd. +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the Qt Quick Controls 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. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qquickpressandholdhelper_p.h" + +#include <QtCore/private/qobject_p.h> +#include <QtGui/qguiapplication.h> +#include <QtGui/qstylehints.h> +#include <QtQuick/qquickitem.h> +#include <QtQuick/private/qquickevents_p_p.h> + +QT_BEGIN_NAMESPACE + +QQuickPressAndHoldHelper::QQuickPressAndHoldHelper() + : control(Q_NULLPTR) + , longPress(false) + , pressAndHoldSignalIndex(-1) + , delayedMousePressEvent(Q_NULLPTR) +{ } + +void QQuickPressAndHoldHelper::mousePressEvent(QMouseEvent *event) +{ + longPress = false; + pressPos = event->localPos(); + if (Qt::LeftButton == (event->buttons() & Qt::LeftButton)) { + timer.start(QGuiApplication::styleHints()->mousePressAndHoldInterval(), control); + delayedMousePressEvent = new QMouseEvent(event->type(), event->pos(), event->button(), event->buttons(), event->modifiers()); + } else { + timer.stop(); + } +} + +void QQuickPressAndHoldHelper::mouseMoveEvent(QMouseEvent *event) +{ + if (qAbs(int(event->localPos().x() - pressPos.x())) > QGuiApplication::styleHints()->startDragDistance()) + timer.stop(); +} + +void QQuickPressAndHoldHelper::mouseReleaseEvent(QMouseEvent *) +{ + if (!longPress) + timer.stop(); +} + +void QQuickPressAndHoldHelper::timerEvent(QTimerEvent *) +{ + timer.stop(); + clearDelayedMouseEvent(); + + if (pressAndHoldSignalIndex == -1) + pressAndHoldSignalIndex = control->metaObject()->indexOfSignal("pressAndHold(QQuickMouseEvent*)"); + Q_ASSERT(pressAndHoldSignalIndex != -1); + + longPress = QObjectPrivate::get(control)->isSignalConnected(pressAndHoldSignalIndex); + if (longPress) { + QQuickMouseEvent mev(pressPos.x(), pressPos.y(), Qt::LeftButton, Qt::LeftButton, + QGuiApplication::keyboardModifiers(), false/*isClick*/, true/*wasHeld*/); + mev.setAccepted(true); + // Use fast signal invocation since we already got its index + QQuickMouseEvent *mevPtr = &mev; + void *args[] = { Q_NULLPTR, &mevPtr }; + QMetaObject::metacall(control, QMetaObject::InvokeMetaMethod, pressAndHoldSignalIndex, args); + if (!mev.isAccepted()) + longPress = false; + } +} + +void QQuickPressAndHoldHelper::clearDelayedMouseEvent() +{ + if (delayedMousePressEvent) { + delete delayedMousePressEvent; + delayedMousePressEvent = 0; + } +} + +bool QQuickPressAndHoldHelper::isActive() +{ + return !(timer.isActive() || longPress); +} + +QT_END_NAMESPACE |