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Diffstat (limited to 'sources/pyside2/doc/codesnippets/doc/src/snippets/myscrollarea.cpp')
-rw-r--r-- | sources/pyside2/doc/codesnippets/doc/src/snippets/myscrollarea.cpp | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/sources/pyside2/doc/codesnippets/doc/src/snippets/myscrollarea.cpp b/sources/pyside2/doc/codesnippets/doc/src/snippets/myscrollarea.cpp new file mode 100644 index 000000000..325f1b317 --- /dev/null +++ b/sources/pyside2/doc/codesnippets/doc/src/snippets/myscrollarea.cpp @@ -0,0 +1,112 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the examples of PySide2. +** +** $QT_BEGIN_LICENSE:BSD$ +** 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 PySide2.QtCore import * +from PySide2.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_(); + |