в 14:21, 25 мая 2010

2010-05-25T14:21:06Z

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==extends QStyle==

<source lang="cpp">
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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 1.1, 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtGui>
#include <QApplication>
class MyPushButton : public QPushButton
{
public:
MyPushButton(QWidget *parent = 0);
void paintEvent(QPaintEvent *);
};
MyPushButton::MyPushButton(QWidget *parent)
: QPushButton(parent)
{
}

void MyPushButton::paintEvent(QPaintEvent *)
{
QStyleOptionButton option;
option.initFrom(this);
option.state = isDown() ? QStyle::State_Sunken : QStyle::State_Raised;
if (isDefault())
option.features |= QStyleOptionButton::DefaultButton;
option.text = text();
option.icon = icon();
QPainter painter(this);
style()->drawControl(QStyle::CE_PushButton, &option, &painter, this);
}

class MyStyle : public QStyle
{
public:
MyStyle();
void drawPrimitive(PrimitiveElement element, const QStyleOption *option,
QPainter *painter, const QWidget *widget);
};
MyStyle::MyStyle()
{
QStyleOptionFrame *option;
if (const QStyleOptionFrame *frameOption =
qstyleoption_cast<const QStyleOptionFrame *>(option)) {
QStyleOptionFrameV2 frameOptionV2(*frameOption);
// draw the frame using frameOptionV2
}

if (const QStyleOptionProgressBar *progressBarOption =
qstyleoption_cast<const QStyleOptionProgressBar *>(option)) {
QStyleOptionProgressBarV2 progressBarV2(*progressBarOption);
// draw the progress bar using progressBarV2
}

if (const QStyleOptionTab *tabOption =
qstyleoption_cast<const QStyleOptionTab *>(option)) {
QStyleOptionTabV2 tabV2(*tabOption);
// draw the tab using tabV2
}
}

void MyStyle::drawPrimitive(PrimitiveElement element,
const QStyleOption *option,
QPainter *painter,
const QWidget *widget)
{
if (element == PE_FrameFocusRect) {
const QStyleOptionFocusRect *focusRectOption =
qstyleoption_cast<const QStyleOptionFocusRect *>(option);
if (focusRectOption) {
// ...
}
}
// ...
}

int main(int argc, char *argv[])
{
QApplication app(argc, argv);
MyPushButton button;
button.show();
return app.exec();
}

</source>

==extends QStylePlugin==

<source lang="cpp">
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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 1.1, 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QApplication>
#include <QtGui>
class MyStylePlugin : public QStylePlugin
{
public:
MyStylePlugin(QObject *parent = 0);
QStyle *create(const QString &key);
QStringList keys() const;
};
class RocketStyle : public QCommonStyle
{
public:
RocketStyle() {};
};
class StarBusterStyle : public QCommonStyle
{
public:
StarBusterStyle() {};
};
MyStylePlugin::MyStylePlugin(QObject *parent)
: QStylePlugin(parent)
{
}

QStringList MyStylePlugin::keys() const
{
return QStringList() << "Rocket" << "StarBuster";
}

QStyle *MyStylePlugin::create(const QString &key)
{
QString lcKey = key;
if (lcKey == "rocket") {
return new RocketStyle;
} else if (lcKey == "starbuster") {
return new StarBusterStyle;
}
return 0;

}

int main(int argc, char *argv[])
{
QApplication app(argc, argv);
MyStylePlugin plugin;
return app.exec();
}

</source>

==QStyleOptionFocusRect and QStyle::PE_FrameFocusRect==

<source lang="cpp">
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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 1.1, 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QStyleOption>
#include <QStylePainter>
#include <QWidget>
class MyWidget : public QWidget
{
protected:
void paintEvent(QPaintEvent *event);
void paintEvent2(QPaintEvent *event);
};

void MyWidget::paintEvent(QPaintEvent * /* event */)
{
QPainter painter(this);

QStyleOptionFocusRect option;
option.initFrom(this);
option.backgroundColor = palette().color(QPalette::Background);

style()->drawPrimitive(QStyle::PE_FrameFocusRect, &option, &painter, this);
}

void MyWidget::paintEvent2(QPaintEvent * /* event */)
{

QStylePainter painter(this);

QStyleOptionFocusRect option;
option.initFrom(this);
option.backgroundColor = palette().color(QPalette::Background);

painter.drawPrimitive(QStyle::PE_FrameFocusRect, option);
}

int main()
{
return 0;
}

</source>

==QStyle options==

<source lang="cpp">
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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 1.1, 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtGui>
#include <QApplication>
class MyPushButton : public QPushButton
{
public:
MyPushButton(QWidget *parent = 0);
void paintEvent(QPaintEvent *);
};
MyPushButton::MyPushButton(QWidget *parent)
: QPushButton(parent)
{
}

void MyPushButton::paintEvent(QPaintEvent *)
{
QStyleOptionButton option;
option.initFrom(this);
option.state = isDown() ? QStyle::State_Sunken : QStyle::State_Raised;
if (isDefault())
option.features |= QStyleOptionButton::DefaultButton;
option.text = text();
option.icon = icon();
QPainter painter(this);
style()->drawControl(QStyle::CE_PushButton, &option, &painter, this);
}

class MyStyle : public QStyle
{
public:
MyStyle();
void drawPrimitive(PrimitiveElement element, const QStyleOption *option,
QPainter *painter, const QWidget *widget);
};
MyStyle::MyStyle()
{
QStyleOptionFrame *option;
if (const QStyleOptionFrame *frameOption =
qstyleoption_cast<const QStyleOptionFrame *>(option)) {
QStyleOptionFrameV2 frameOptionV2(*frameOption);
// draw the frame using frameOptionV2
}

if (const QStyleOptionProgressBar *progressBarOption =
qstyleoption_cast<const QStyleOptionProgressBar *>(option)) {
QStyleOptionProgressBarV2 progressBarV2(*progressBarOption);
// draw the progress bar using progressBarV2
}

if (const QStyleOptionTab *tabOption =
qstyleoption_cast<const QStyleOptionTab *>(option)) {
QStyleOptionTabV2 tabV2(*tabOption);
// draw the tab using tabV2
}
}

void MyStyle::drawPrimitive(PrimitiveElement element,
const QStyleOption *option,
QPainter *painter,
const QWidget *widget)
{
if (element == PE_FrameFocusRect) {
const QStyleOptionFocusRect *focusRectOption =
qstyleoption_cast<const QStyleOptionFocusRect *>(option);
if (focusRectOption) {
// ...
}
}
// ...
}

int main(int argc, char *argv[])
{
QApplication app(argc, argv);
MyPushButton button;
button.show();
return app.exec();
}

</source>

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в 14:21, 25 мая 2010

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