QIStateIndicator.cpp revision e64031e20c39650a7bc902a3e1aba613b9415dee
0N/A/* $Id$ */
3261N/A/** @file
0N/A *
0N/A * VBox frontends: Qt GUI ("VirtualBox"):
0N/A * VirtualBox Qt extensions: QIStateIndicator class implementation
0N/A */
2362N/A
0N/A/*
2362N/A * Copyright (C) 2006-2007 Oracle Corporation
0N/A *
0N/A * This file is part of VirtualBox Open Source Edition (OSE), as
0N/A * available from http://www.virtualbox.org. This file is free software;
0N/A * you can redistribute it and/or modify it under the terms of the GNU
0N/A * General Public License (GPL) as published by the Free Software
0N/A * Foundation, in version 2 as it comes in the "COPYING" file of the
0N/A * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
0N/A * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
0N/A */
0N/A
0N/A#include "QIStateIndicator.h"
2362N/A
2362N/A/* Qt includes */
2362N/A#include <QPainter>
0N/A#ifdef Q_WS_MAC
0N/A# include <QContextMenuEvent>
0N/A#endif
0N/A
0N/A/** @clas QIStateIndicator
0N/A *
0N/A * The QIStateIndicator class is a simple class that can visually indicate
0N/A * the state of some thing, as described by the state property.
0N/A */
0N/A
2116N/AQIStateIndicator::QIStateIndicator(QWidget *pParent /* = 0 */)
0N/A : QFrame(pParent)
0N/A , mState(0)
0N/A , mSize(0, 0)
0N/A{
0N/A setSizePolicy(QSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed));
0N/A}
0N/A
0N/A/**
0N/A * Constructs a new QIStateIndicator instance. This instance is useless
0N/A * until icons are specified for necessary states.
0N/A *
0N/A * @param aState
0N/A * the initial indicator state
0N/A */
0N/AQIStateIndicator::QIStateIndicator (int aState)
0N/A// : QFrame (aParent, aName, aFlags | Qt::WStaticContents | Qt::WMouseNoMask)
0N/A{
0N/A mState = aState;
mSize = QSize (0, 0);
setSizePolicy (QSizePolicy (QSizePolicy::Fixed, QSizePolicy::Fixed));
/* we will precompose the pixmap background using the widget bacground in
* drawContents(), so try to set the correct bacground origin for the
* case when a pixmap is used as a widget background. */
// if (aParent)
// setBackgroundOrigin (aParent->backgroundOrigin());
}
QIStateIndicator::~QIStateIndicator()
{
qDeleteAll (mStateIcons);
}
QSize QIStateIndicator::sizeHint() const
{
return mSize;
}
QPixmap QIStateIndicator::stateIcon (int aState) const
{
Icon *icon = mStateIcons [aState];
return icon ? icon->pixmap : QPixmap();
}
/**
* Sets an icon for the specified state. The first icon set by this method
* defines the preferred size of this indicator. All other icons will be
* scaled to fit this size.
*
* @note If this widget is constructed with the WNoAutoErase flag, then all
* transparent areas of the new state icon are filled with the widget
* background color or pixmap (as taken from the widget palette), to provide
* flicker free state redraws in one single operation (which is useful for
* indicators that frequently change their state).
*/
void QIStateIndicator::setStateIcon (int aState, const QPixmap &aPixmap)
{
/* Here we just set the original pixmap. All actual work from the @note
* above takes place in #drawContents(). */
mStateIcons.insert (aState, new Icon (aPixmap));
if (mSize.isNull())
mSize = aPixmap.size();
}
void QIStateIndicator::setState (int aState)
{
mState = aState;
repaint();
}
void QIStateIndicator::paintEvent (QPaintEvent * /* aEv */)
{
QPainter painter (this);
drawContents (&painter);
}
void QIStateIndicator::drawContents (QPainter *aPainter)
{
Icon *icon = mStateIcons [mState];
if (icon)
aPainter->drawPixmap (contentsRect(), icon->pixmap);
}
#ifdef Q_WS_MAC
/**
* Make the left button also show the context menu to make things
* simpler for users with single mouse button mice (laptops++).
*/
void QIStateIndicator::mousePressEvent (QMouseEvent *aEv)
{
/* Do this for the left mouse button event only, cause in the case of the
* right mouse button it could happen that the context menu event is
* triggered twice. Also this isn't necessary for the middle mouse button
* which would be some kind of overstated. */
if (aEv->button() == Qt::LeftButton)
{
QContextMenuEvent qme (QContextMenuEvent::Mouse, aEv->pos(), aEv->globalPos());
emit contextMenuRequested (this, &qme);
if (qme.isAccepted())
aEv->accept();
else
QFrame::mousePressEvent (aEv);
}else
QFrame::mousePressEvent (aEv);
}
#endif /* Q_WS_MAC */
void QIStateIndicator::mouseDoubleClickEvent (QMouseEvent * e)
{
emit mouseDoubleClicked (this, e);
}
void QIStateIndicator::contextMenuEvent (QContextMenuEvent * e)
{
emit contextMenuRequested (this, e);
}