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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of Qt for Python.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, 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 The Qt Company Ltd 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
from PySide6.QtCore import *
from PySide6.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_();
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