C++/Qt/QStyle
Содержание
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>