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flow_layout.py
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flow_layout.py
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from aqt.qt import *
class FlowLayout(QLayout):
def __init__(self, parent=None, margin=0, spacing=-1):
super().__init__(parent)
if parent is not None:
self.setContentsMargins(margin, margin, margin, margin)
self.itemList = []
self.setSpacing(spacing)
def addItem(self, item):
self.itemList.append(item)
def count(self):
return len(self.itemList)
def itemAt(self, index):
if 0 <= index < len(self.itemList):
return self.itemList[index]
return None
def takeAt(self, index):
if 0 <= index < len(self.itemList):
return self.itemList.pop(index)
return None
def expandingDirections(self):
return Qt.Orientation(0)
def hasHeightForWidth(self):
return True
def heightForWidth(self, width):
return self.doLayout(QRect(0, 0, width, 0), True)
def setGeometry(self, rect):
super().setGeometry(rect)
self.doLayout(rect, False)
def sizeHint(self):
return self.minimumSize()
def minimumSize(self):
size = QSize()
for item in self.itemList:
size = size.expandedTo(item.minimumSize())
margins = self.contentsMargins()
size += QSize(margins.left() + margins.right(), margins.top() + margins.bottom())
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()
spaceY = self.spacing()
if wid:
spaceX += wid.style().layoutSpacing(QSizePolicy.ControlType.PushButton,
QSizePolicy.ControlType.PushButton, Qt.Orientation.Horizontal)
spaceY += wid.style().layoutSpacing(QSizePolicy.ControlType.PushButton,
QSizePolicy.ControlType.PushButton, Qt.Orientation.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(QRect(QPoint(x, y), item.sizeHint()))
x = nextX
lineHeight = max(lineHeight, item.sizeHint().height())
return y + lineHeight - rect.y()