C++/Qt/QSplitter

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Paint QSplitter

  
/****************************************************************************
**
** 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.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef SPLITTER_H
#define SPLITTER_H
#include <QLinearGradient>
#include <QSplitter>
#include <QSplitterHandle>
class QPaintEvent;

class Splitter : public QSplitter
{
public:
    Splitter(Qt::Orientation orientation, QWidget *parent = 0);
protected:
    QSplitterHandle *createHandle();
};

class SplitterHandle : public QSplitterHandle
{
public:
    SplitterHandle(Qt::Orientation orientation, QSplitter *parent);
protected:
    void paintEvent(QPaintEvent *event);
private:
    QLinearGradient gradient;
};
#endif


#include <QtGui>
#include "splitter.h"
SplitterHandle::SplitterHandle(Qt::Orientation orientation, QSplitter *parent)
    : QSplitterHandle(orientation, parent)
{
    gradient.setColorAt(0.0, Qt::darkGreen);
    gradient.setColorAt(0.25, Qt::white);
    gradient.setColorAt(1.0, Qt::darkGreen);
}

void SplitterHandle::paintEvent(QPaintEvent *event)
{
    QPainter painter(this);
    if (orientation() == Qt::Horizontal) {
        gradient.setStart(rect().left(), rect().height()/2);
        gradient.setFinalStop(rect().right(), rect().height()/2);
    } else {
        gradient.setStart(rect().width()/2, rect().top());
        gradient.setFinalStop(rect().width()/2, rect().bottom());
    }
    painter.fillRect(event->rect(), QBrush(gradient));
}

Splitter::Splitter(Qt::Orientation orientation, QWidget *parent)
    : QSplitter(orientation, parent)
{
}

QSplitterHandle *Splitter::createHandle()
{
    return new SplitterHandle(orientation(), this);
}



#include <QApplication>
#include <QLabel>
#include "splitter.h"
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    Splitter splitter(Qt::Horizontal);
    splitter.addWidget(new QLabel("Hello"));
    splitter.addWidget(new QLabel("World"));
    Splitter verticalSplitter(Qt::Vertical, &splitter);
    verticalSplitter.addWidget(new QLabel("A"));
    verticalSplitter.addWidget(new QLabel("B"));
    splitter.show();
    return app.exec();
}


QSplitter, QListView and QTreeView

  
/****************************************************************************
**
** 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>
void processSize(int)
{
}
int main()
{
    QWidget *parent = 0;

    QSplitter *splitter = new QSplitter(parent);
    QListView *listview = new QListView;
    QTreeView *treeview = new QTreeView;
    QTextEdit *textedit = new QTextEdit;
    splitter->addWidget(listview);
    splitter->addWidget(treeview);
    splitter->addWidget(textedit);

    {
    // SAVE STATE
    QSettings settings;
    settings.setValue("splitterSizes", splitter->saveState());
    }
    {
    // RESTORE STATE
    QSettings settings;
    splitter->restoreState(settings.value("splitterSizes").toByteArray());
    }

    QListIterator<int> it(splitter->sizes());
    while (it.hasNext())
        processSize(it.next());

    return 0;
}


Set Stretch Factor for QSplitter

  
#include <QtGui>
int main(int argc, char *argv[]){
  QApplication a(argc, argv);
  QSplitter s;
  QTextEdit *txtEdit = 0;
  for (int stretch = 1; stretch <= 5; stretch++) {
    txtEdit = new QTextEdit(&s);
    s.addWidget(txtEdit);
    s.setStretchFactor(s.indexOf(txtEdit), stretch);
  }
  s.show();
  return a.exec();
}