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Diffstat (limited to 'examples/widgets/layouts/flowlayout.py')
-rwxr-xr-x | examples/widgets/layouts/flowlayout.py | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/examples/widgets/layouts/flowlayout.py b/examples/widgets/layouts/flowlayout.py new file mode 100755 index 000000000..75dfa4679 --- /dev/null +++ b/examples/widgets/layouts/flowlayout.py @@ -0,0 +1,156 @@ +#!/usr/bin/env python + +############################################################################ +## +## Copyright (C) 2013 Riverbank Computing Limited. +## Copyright (C) 2016 The Qt Company Ltd. +## Contact: http://www.qt.io/licensing/ +## +## This file is part of the PySide examples 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 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." +## +## $QT_END_LICENSE$ +## +############################################################################# + +"""PySide2 port of the widgets/layouts/flowlayout example from Qt v5.x""" + +from PySide2 import QtCore, QtGui, QtWidgets + + +class Window(QtWidgets.QWidget): + def __init__(self): + super(Window, self).__init__() + + flowLayout = FlowLayout() + flowLayout.addWidget(QtWidgets.QPushButton("Short")) + flowLayout.addWidget(QtWidgets.QPushButton("Longer")) + flowLayout.addWidget(QtWidgets.QPushButton("Different text")) + flowLayout.addWidget(QtWidgets.QPushButton("More text")) + flowLayout.addWidget(QtWidgets.QPushButton("Even longer button text")) + self.setLayout(flowLayout) + + self.setWindowTitle("Flow Layout") + + +class FlowLayout(QtWidgets.QLayout): + def __init__(self, parent=None, margin=0, spacing=-1): + super(FlowLayout, self).__init__(parent) + + if parent is not None: + self.setMargin(margin) + + self.setSpacing(spacing) + + self.itemList = [] + + def __del__(self): + item = self.takeAt(0) + while item: + item = self.takeAt(0) + + def addItem(self, item): + self.itemList.append(item) + + def count(self): + return len(self.itemList) + + def itemAt(self, index): + if index >= 0 and index < len(self.itemList): + return self.itemList[index] + + return None + + def takeAt(self, index): + if index >= 0 and index < len(self.itemList): + return self.itemList.pop(index) + + return None + + def expandingDirections(self): + return QtCore.Qt.Orientations(QtCore.Qt.Orientation(0)) + + def hasHeightForWidth(self): + return True + + def heightForWidth(self, width): + height = self.doLayout(QtCore.QRect(0, 0, width, 0), True) + return height + + def setGeometry(self, rect): + super(FlowLayout, self).setGeometry(rect) + self.doLayout(rect, False) + + def sizeHint(self): + return self.minimumSize() + + def minimumSize(self): + size = QtCore.QSize() + + for item in self.itemList: + size = size.expandedTo(item.minimumSize()) + + size += QtCore.QSize(2 * self.contentsMargins().top(), 2 * self.contentsMargins().top()) + return size + + def doLayout(self, rect, testOnly): + x = rect.x() + y = rect.y() + lineHeight = 0 + + for item in self.itemList: + wid = item.widget() + spaceX = self.spacing() + wid.style().layoutSpacing(QtWidgets.QSizePolicy.PushButton, QtWidgets.QSizePolicy.PushButton, QtCore.Qt.Horizontal) + spaceY = self.spacing() + wid.style().layoutSpacing(QtWidgets.QSizePolicy.PushButton, QtWidgets.QSizePolicy.PushButton, QtCore.Qt.Vertical) + nextX = x + item.sizeHint().width() + spaceX + if nextX - spaceX > rect.right() and lineHeight > 0: + x = rect.x() + y = y + lineHeight + spaceY + nextX = x + item.sizeHint().width() + spaceX + lineHeight = 0 + + if not testOnly: + item.setGeometry(QtCore.QRect(QtCore.QPoint(x, y), item.sizeHint())) + + x = nextX + lineHeight = max(lineHeight, item.sizeHint().height()) + + return y + lineHeight - rect.y() + + +if __name__ == '__main__': + + import sys + + app = QtWidgets.QApplication(sys.argv) + mainWin = Window() + mainWin.show() + sys.exit(app.exec_()) |