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Diffstat (limited to 'doc/codesnippets/doc/src/snippets/myscrollarea.cpp')
-rw-r--r-- | doc/codesnippets/doc/src/snippets/myscrollarea.cpp | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/doc/codesnippets/doc/src/snippets/myscrollarea.cpp b/doc/codesnippets/doc/src/snippets/myscrollarea.cpp new file mode 100644 index 000000000..0f3b17cea --- /dev/null +++ b/doc/codesnippets/doc/src/snippets/myscrollarea.cpp @@ -0,0 +1,103 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** 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 1.0, 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 are unsure which license is appropriate for your use, please +** contact the sales department at http://www.qtsoftware.com/contact. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +from PySide.QtCore import * +from PySide.QtGui import * +import sys + +class MyScrollArea (QAbstractScrollArea): + widget = None + + def __init__(widget): + self.setWidget(widget); + + def setWidget(w): + self.widget = w; + self.widget.setParent(viewport()); + if not self.widget.testAttribute(Qt.WA_Resized): + self.widget.resize(widget.sizeHint()) + + self.verticalScrollBar().setValue(0) + self.verticalScrollBar().setValue(0) + + self.updateArea() + + + def updateWidgetPosition(): +//! [0] + hvalue = self.horizontalScrollBar().value() + vvalue = self.verticalScrollBar().value() + topLeft = self.viewport().rect().topLeft() + + self.widget.move(topLeft.x() - hvalue, topLeft.y() - vvalue) +//! [0] + + + def scrollContentsBy(dx, dy): + self.updateWidgetPosition() + + def updateArea(): +//! [1] + areaSize = viewport().size() + widgetSize = widget.size() + + self.verticalScrollBar().setPageStep(widgetSize.height()) + self.horizontalScrollBar().setPageStep(widgetSize.width()) + self.verticalScrollBar().setRange(0, widgetSize.height() - areaSize.height()) + self.horizontalScrollBar().setRange(0, widgetSize.width() - areaSize.width()) + self.updateWidgetPosition() +//! [1] + + def resizeEvent(QResizeEvent): + self.updateArea() + +app = QApplication(sys.argv) +pixmap = QPixmap("mypixmap.png") +label = QLabel() +label.setPixmap(pixmap) +area = MyScrollArea(label) +area.resize(300, 300) +area.show() + +area.setWidget(label) + +app.exec_(); + |