qt5base-lts/examples/graphicsview/embeddeddialogs/customproxy.cpp
Jason McDonald 1fdfc2abfe Update copyright year in license headers.
Change-Id: I02f2c620296fcd91d4967d58767ea33fc4e1e7dc
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>
2012-01-05 06:36:56 +01:00

168 lines
5.9 KiB
C++

/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 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 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "customproxy.h"
#include <QtWidgets>
CustomProxy::CustomProxy(QGraphicsItem *parent, Qt::WindowFlags wFlags)
: QGraphicsProxyWidget(parent, wFlags), popupShown(false), currentPopup(0)
{
timeLine = new QTimeLine(250, this);
connect(timeLine, SIGNAL(valueChanged(qreal)),
this, SLOT(updateStep(qreal)));
connect(timeLine, SIGNAL(stateChanged(QTimeLine::State)),
this, SLOT(stateChanged(QTimeLine::State)));
}
QRectF CustomProxy::boundingRect() const
{
return QGraphicsProxyWidget::boundingRect().adjusted(0, 0, 10, 10);
}
void CustomProxy::paintWindowFrame(QPainter *painter, const QStyleOptionGraphicsItem *option,
QWidget *widget)
{
const QColor color(0, 0, 0, 64);
QRectF r = windowFrameRect();
QRectF right(r.right(), r.top() + 10, 10, r.height() - 10);
QRectF bottom(r.left() + 10, r.bottom(), r.width(), 10);
bool intersectsRight = right.intersects(option->exposedRect);
bool intersectsBottom = bottom.intersects(option->exposedRect);
if (intersectsRight && intersectsBottom) {
QPainterPath path;
path.addRect(right);
path.addRect(bottom);
painter->setPen(Qt::NoPen);
painter->setBrush(color);
painter->drawPath(path);
} else if (intersectsBottom) {
painter->fillRect(bottom, color);
} else if (intersectsRight) {
painter->fillRect(right, color);
}
QGraphicsProxyWidget::paintWindowFrame(painter, option, widget);
}
void CustomProxy::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
{
QGraphicsProxyWidget::hoverEnterEvent(event);
scene()->setActiveWindow(this);
if (timeLine->currentValue() != 1)
zoomIn();
}
void CustomProxy::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
{
QGraphicsProxyWidget::hoverLeaveEvent(event);
if (!popupShown && (timeLine->direction() != QTimeLine::Backward || timeLine->currentValue() != 0))
zoomOut();
}
bool CustomProxy::sceneEventFilter(QGraphicsItem *watched, QEvent *event)
{
if (watched->isWindow() && (event->type() == QEvent::UngrabMouse || event->type() == QEvent::GrabMouse)) {
popupShown = watched->isVisible();
if (!popupShown && !isUnderMouse())
zoomOut();
}
return QGraphicsProxyWidget::sceneEventFilter(watched, event);
}
QVariant CustomProxy::itemChange(GraphicsItemChange change, const QVariant &value)
{
if (change == ItemChildAddedChange || change == ItemChildRemovedChange) {
if (change == ItemChildAddedChange) {
currentPopup = qvariant_cast<QGraphicsItem *>(value);
currentPopup->setCacheMode(ItemCoordinateCache);
if (scene())
currentPopup->installSceneEventFilter(this);
} else if (scene()) {
currentPopup->removeSceneEventFilter(this);
currentPopup = 0;
}
} else if (currentPopup && change == ItemSceneHasChanged) {
currentPopup->installSceneEventFilter(this);
}
return QGraphicsProxyWidget::itemChange(change, value);
}
void CustomProxy::updateStep(qreal step)
{
QRectF r = boundingRect();
setTransform(QTransform()
.translate(r.width() / 2, r.height() / 2)
.rotate(step * 30, Qt::XAxis)
.rotate(step * 10, Qt::YAxis)
.rotate(step * 5, Qt::ZAxis)
.scale(1 + 1.5 * step, 1 + 1.5 * step)
.translate(-r.width() / 2, -r.height() / 2));
}
void CustomProxy::stateChanged(QTimeLine::State state)
{
if (state == QTimeLine::Running) {
if (timeLine->direction() == QTimeLine::Forward)
setCacheMode(ItemCoordinateCache);
} else if (state == QTimeLine::NotRunning) {
if (timeLine->direction() == QTimeLine::Backward)
setCacheMode(DeviceCoordinateCache);
}
}
void CustomProxy::zoomIn()
{
if (timeLine->direction() != QTimeLine::Forward)
timeLine->setDirection(QTimeLine::Forward);
if (timeLine->state() == QTimeLine::NotRunning)
timeLine->start();
}
void CustomProxy::zoomOut()
{
if (timeLine->direction() != QTimeLine::Backward)
timeLine->setDirection(QTimeLine::Backward);
if (timeLine->state() == QTimeLine::NotRunning)
timeLine->start();
}