Nils
4 years ago
3 changed files with 18 additions and 166 deletions
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#!/usr/bin/env python |
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############################################################################# |
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## |
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## Copyright (C) 2013 Riverbank Computing Limited. |
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## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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## All rights reserved. |
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## |
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## This file is part of the examples of PyQt. |
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## |
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## $QT_BEGIN_LICENSE:BSD$ |
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## You may use this file under the terms of the BSD license as follows: |
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## |
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## "Redistribution and use in source and binary forms, with or without |
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## modification, are permitted provided that the following conditions are |
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## met: |
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## * Redistributions of source code must retain the above copyright |
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## notice, this list of conditions and the following disclaimer. |
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## * Redistributions in binary form must reproduce the above copyright |
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## notice, this list of conditions and the following disclaimer in |
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## the documentation and/or other materials provided with the |
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## distribution. |
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## * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor |
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## the names of its contributors may be used to endorse or promote |
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## products derived from this software without specific prior written |
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## permission. |
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## |
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## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." |
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## $QT_END_LICENSE$ |
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## |
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############################################################################# |
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from PyQt5.QtCore import QPoint, QRect, QSize, Qt |
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from PyQt5.QtWidgets import (QApplication, QLayout, QPushButton, QSizePolicy, |
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QWidget) |
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class Window(QWidget): |
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def __init__(self): |
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super(Window, self).__init__() |
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flowLayout = FlowLayout() |
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flowLayout.addWidget(QPushButton("Short")) |
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flowLayout.addWidget(QPushButton("Longer")) |
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flowLayout.addWidget(QPushButton("Different text")) |
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flowLayout.addWidget(QPushButton("More text")) |
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flowLayout.addWidget(QPushButton("Even longer button text")) |
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self.setLayout(flowLayout) |
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self.setWindowTitle("Flow Layout") |
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class FlowLayout(QLayout): |
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def __init__(self, parent=None, margin=0, spacing=-1): |
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super(FlowLayout, self).__init__(parent) |
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if parent is not None: |
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self.setContentsMargins(margin, margin, margin, margin) |
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self.setSpacing(spacing) |
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self.itemList = [] |
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def __del__(self): |
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item = self.takeAt(0) |
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while item: |
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item = self.takeAt(0) |
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def addItem(self, item): |
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self.itemList.append(item) |
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def count(self): |
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return len(self.itemList) |
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def itemAt(self, index): |
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if index >= 0 and index < len(self.itemList): |
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return self.itemList[index] |
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return None |
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def takeAt(self, index): |
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if index >= 0 and index < len(self.itemList): |
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return self.itemList.pop(index) |
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return None |
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def expandingDirections(self): |
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return Qt.Orientations(Qt.Orientation(0)) |
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def hasHeightForWidth(self): |
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return True |
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def heightForWidth(self, width): |
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height = self.doLayout(QRect(0, 0, width, 0), True) |
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return height |
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def setGeometry(self, rect): |
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super(FlowLayout, self).setGeometry(rect) |
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self.doLayout(rect, False) |
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def sizeHint(self): |
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return self.minimumSize() |
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def minimumSize(self): |
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size = QSize() |
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for item in self.itemList: |
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size = size.expandedTo(item.minimumSize()) |
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margin, _, _, _ = self.getContentsMargins() |
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size += QSize(2 * margin, 2 * margin) |
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return size |
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def doLayout(self, rect, testOnly): |
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x = rect.x() |
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y = rect.y() |
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lineHeight = 0 |
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for item in self.itemList: |
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wid = item.widget() |
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spaceX = self.spacing() + wid.style().layoutSpacing(QSizePolicy.PushButton, QSizePolicy.PushButton, Qt.Horizontal) |
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spaceY = self.spacing() + wid.style().layoutSpacing(QSizePolicy.PushButton, QSizePolicy.PushButton, Qt.Vertical) |
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nextX = x + item.sizeHint().width() + spaceX |
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if nextX - spaceX > rect.right() and lineHeight > 0: |
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x = rect.x() |
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y = y + lineHeight + spaceY |
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nextX = x + item.sizeHint().width() + spaceX |
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lineHeight = 0 |
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if not testOnly: |
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item.setGeometry(QRect(QPoint(x, y), item.sizeHint())) |
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x = nextX |
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lineHeight = max(lineHeight, item.sizeHint().height()) |
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return y + lineHeight - rect.y() |
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if __name__ == '__main__': |
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import sys |
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app = QApplication(sys.argv) |
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mainWin = Window() |
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mainWin.show() |
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sys.exit(app.exec_()) |
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