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+/****************************************************************************
+**
+** Copyright (C) 2011 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.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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 Nokia Corporation and its Subsidiary(-ies) 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 <QtGui>
+#include <QApplication>
+
+class MyPushButton : public QPushButton
+{
+public:
+ MyPushButton(QWidget *parent = 0);
+
+ void paintEvent(QPaintEvent *);
+};
+
+MyPushButton::MyPushButton(QWidget *parent)
+ : QPushButton(parent)
+{
+}
+
+//! [0]
+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);
+}
+//! [0]
+
+
+
+class MyStyle : public QStyle
+{
+public:
+ MyStyle();
+
+ void drawPrimitive(PrimitiveElement element, const QStyleOption *option,
+ QPainter *painter, const QWidget *widget);
+};
+
+MyStyle::MyStyle()
+{
+//! [1]
+ QStyleOptionFrame *option;
+
+ if (const QStyleOptionFrame *frameOption =
+ qstyleoption_cast<const QStyleOptionFrame *>(option)) {
+ QStyleOptionFrameV2 frameOptionV2(*frameOption);
+
+ // draw the frame using frameOptionV2
+ }
+//! [1]
+
+//! [2]
+ if (const QStyleOptionProgressBar *progressBarOption =
+ qstyleoption_cast<const QStyleOptionProgressBar *>(option)) {
+ QStyleOptionProgressBarV2 progressBarV2(*progressBarOption);
+
+ // draw the progress bar using progressBarV2
+ }
+//! [2]
+
+//! [3]
+ if (const QStyleOptionTab *tabOption =
+ qstyleoption_cast<const QStyleOptionTab *>(option)) {
+ QStyleOptionTabV2 tabV2(*tabOption);
+
+ // draw the tab using tabV2
+ }
+//! [3]
+}
+
+//! [4]
+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) {
+ // ...
+ }
+ }
+ // ...
+}
+//! [4]
+
+int main(int argc, char *argv[])
+{
+ QApplication app(argc, argv);
+ MyPushButton button;
+ button.show();
+ return app.exec();
+}