| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the demonstration applications of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:BSD$ |
| ** 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. |
| ** |
| ** BSD License Usage |
| ** Alternatively, you may use this file under the terms of the BSD license |
| ** as follows: |
| ** |
| ** "Redistribution and use in source and binary forms, with or without |
| ** modification, are permitted provided that the following conditions are |
| ** met: |
| ** * Redistributions of source code must retain the above copyright |
| ** notice, this list of conditions and the following disclaimer. |
| ** * Redistributions in binary form must reproduce the above copyright |
| ** notice, this list of conditions and the following disclaimer in |
| ** the documentation and/or other materials provided with the |
| ** distribution. |
| ** * Neither the name of The Qt Company Ltd nor the names of its |
| ** contributors may be used to endorse or promote products derived |
| ** from this software without specific prior written permission. |
| ** |
| ** |
| ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #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(); |
| } |