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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "customproxy.h"
#include <QGraphicsScene>
#include <QPainter>
#include <QStyleOptionGraphicsItem>
CustomProxy::CustomProxy(QGraphicsItem *parent, Qt::WindowFlags wFlags)
: QGraphicsProxyWidget(parent, wFlags), timeLine(new QTimeLine(250, this))
{
connect(timeLine, &QTimeLine::valueChanged,
this, &CustomProxy::updateStep);
connect(timeLine, &QTimeLine::stateChanged,
this, &CustomProxy::stateChanged);
}
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 (qFuzzyCompare(timeLine->currentValue(), 1))
zoomIn();
}
void CustomProxy::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
{
QGraphicsProxyWidget::hoverLeaveEvent(event);
if (!popupShown
&& (timeLine->direction() != QTimeLine::Backward || qFuzzyIsNull(timeLine->currentValue()))) {
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 = nullptr;
}
} 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();
}
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