from PySide6.QtCore import QPoint, QRect, QSize, Qt
from PySide6.QtWidgets import QApplication, QLayout, QPushButton, QSizePolicy, QWidget
[docs]class FlowLayout(QLayout):
def __init__(self, parent = None, margin = 0, spacingH = 0, spacingV = 0):
super().__init__(parent)
self.setContentsMargins(margin, margin, margin, margin)
# self.setSpacing(spacing)
self.spacings = (spacingH, spacingV)
self.itemList = []
def __del__(self):
item = self.takeAt(0)
while item: item = self.takeAt(0)
[docs] def addItem(self, item):
self.itemList.append(item)
[docs] def count(self):
return len(self.itemList)
[docs] def itemAt(self, index):
if index >= 0 and index < len(self.itemList):
return self.itemList[index]
else:
return None
[docs] def takeAt(self, index):
if index >= 0 and index < len(self.itemList):
return self.itemList.pop(index)
else:
return None
[docs] def expandingDirections(self):
return Qt.Orientations(Qt.Orientation(0))
[docs] def hasHeightForWidth(self):
return True
[docs] def heightForWidth(self, width):
return self.doLayout(QRect(0, 0, width, 0), True)
[docs] def setGeometry(self, rect):
super().setGeometry(rect)
self.doLayout(rect, False)
[docs] def sizeHint(self):
return self.minimumSize()
[docs] def minimumSize(self):
size = QSize()
for item in self.itemList: size = size.expandedTo(item.minimumSize())
margin, _, _, _ = self.getContentsMargins()
size += QSize(2 * margin, 2 * margin)
return size
[docs] def doLayout(self, rect, testOnly):
x = rect.x()
y = rect.y()
lineHeight = 0
for item in self.itemList:
wid = item.widget()
spaceX, spaceY = self.spacings
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(QRect(QPoint(x, y), item.sizeHint()))
x = nextX
lineHeight = max(lineHeight, item.sizeHint().height())
return y + lineHeight - rect.y()
if __name__ == '__main__':
import sys
[docs] app = QApplication(sys.argv)
flowLayout = FlowLayout(spacingH = 10, spacingV = 5)
flowLayout.addWidget(QPushButton("Short"))
flowLayout.addWidget(QPushButton("Longer"))
flowLayout.addWidget(QPushButton("Different text"))
flowLayout.addWidget(QPushButton("More text"))
flowLayout.addWidget(QPushButton("Even longer button text"))
win = QWidget()
win.setLayout(flowLayout)
win.setWindowTitle("Flow Layout")
win.show()
sys.exit(app.exec_())