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Diffstat (limited to 'examples/animation/research/photobrowser/menu.cpp')
| -rw-r--r-- | examples/animation/research/photobrowser/menu.cpp | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/examples/animation/research/photobrowser/menu.cpp b/examples/animation/research/photobrowser/menu.cpp new file mode 100644 index 0000000..97493ba --- /dev/null +++ b/examples/animation/research/photobrowser/menu.cpp @@ -0,0 +1,155 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the QtCore module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, 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 1.0, 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. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "menu.h" + +Menu::Menu(QGraphicsItem *parent) : QGraphicsWidget(parent), m_selected(0) +{ + setFlag(QGraphicsItem::ItemIsFocusable); + m_selection = new QGraphicsRectItem(this); + QLinearGradient linearGrad(QPointF(0, 0), QPointF(0,50)); + linearGrad.setColorAt(0, QColor(255,255,255,128)); + linearGrad.setColorAt(1, QColor(255,255,255,16)); + m_selection->setBrush(linearGrad); + m_selection->setPen(QPen(Qt::transparent)); +} + +Menu::~Menu() +{ +} + + +MenuAction *Menu::addAction(const QString &text, QObject *receiver, const char* slot) +{ + MenuAction *action = new MenuAction(text, this); + if (!m_actions.isEmpty()) { + MenuAction *last = m_actions.last(); + action->setPos(last->pos() + last->boundingRect().bottomLeft()); + } + m_actions.append(action); + if (m_selection->boundingRect().width() < action->boundingRect().width()) + m_selection->setRect(action->boundingRect()); + + QObject::connect(action, SIGNAL(triggered()), receiver, slot); + return action; +} + +QRectF Menu::boundingRect() const +{ + QRectF res; + foreach (MenuAction *a, m_actions) + res |= a->boundingRect(); + return res; +} + +void Menu::keyPressEvent (QKeyEvent * event) +{ + switch (event->key()) { + case Qt::Key_Escape: + hide(); + break; + case Qt::Key_Up: + m_selected -= 2; + case Qt::Key_Down: + if (!m_actions.isEmpty()) { + m_selected = (m_selected + 1 + m_actions.count()) % m_actions.count(); + QItemAnimation *anim = new QItemAnimation(m_selection, QItemAnimation::Position); + anim->setEndValue(m_actions.at(m_selected)->pos()); + anim->start(QAbstractAnimation::DeleteWhenStopped); + } + break; + case Qt::Key_Enter: + case Qt::Key_Return: + if (!m_actions.isEmpty()) { + QItemAnimation *anim = new QItemAnimation(m_selection, QItemAnimation::RotationX); + anim->setEndValue(m_selection->xRotation() < 180 ? qreal(360) : qreal(0)); + anim->start(QAbstractAnimation::DeleteWhenStopped); + m_actions.at(m_selected)->trigger(); + hide(); + } + break; + default: + QGraphicsItem::keyPressEvent(event); + } +} + +void Menu::show() +{ + QItemAnimation *anim = new QItemAnimation(this, QItemAnimation::Opacity); + anim->setEndValue(qreal(1.)); + anim->start(QAbstractAnimation::DeleteWhenStopped); + anim = new QItemAnimation(m_selection, QItemAnimation::ScaleFactorX); + anim->setEndValue(qreal(1)); + anim->start(QAbstractAnimation::DeleteWhenStopped); + anim = new QItemAnimation(m_selection, QItemAnimation::ScaleFactorY); + anim->setEndValue(qreal(1)); + anim->start(QAbstractAnimation::DeleteWhenStopped); + setFocus(); +} + +void Menu::hide() +{ + QItemAnimation *anim = new QItemAnimation(m_selection, QItemAnimation::ScaleFactorX); + anim->setEndValue(qreal(.1)); + anim->start(QAbstractAnimation::DeleteWhenStopped); + anim = new QItemAnimation(m_selection, QItemAnimation::ScaleFactorY); + anim->setEndValue(qreal(.1)); + anim->start(QAbstractAnimation::DeleteWhenStopped); + anim = new QItemAnimation(this, QItemAnimation::Opacity); + anim->setEndValue(qreal(0)); + anim->start(QAbstractAnimation::DeleteWhenStopped); + parentItem()->setFocus(); +} + + +MenuAction::MenuAction(const QString &text, Menu * parent) + : QGraphicsTextItem(text,parent) +{ + QFont f = font(); + f.setPointSize(18); + setFont(f); + setDefaultTextColor(Qt::white); +} + +void MenuAction::trigger() +{ + emit triggered(); +} |