120 lines
3.3 KiB
Python
120 lines
3.3 KiB
Python
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#!/usr/bin/env python
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# -*- coding: UTF-8 -*-
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from PyQt5.QtCore import QPoint, QRect, QSize, Qt
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from PyQt5.QtWidgets import (QApplication, QLayout, QPushButton, QSizePolicy, 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,
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QSizePolicy.PushButton, Qt.Horizontal)
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spaceY = self.spacing() + wid.style().layoutSpacing(QSizePolicy.PushButton,
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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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