104 lines
3.1 KiB
Python
104 lines
3.1 KiB
Python
from PyQt5.QtCore import QPoint, QRect, QSize, Qt
|
|
from PyQt5.QtWidgets import QLayout, QSizePolicy, QStyle
|
|
|
|
__author__ = 'tanshu'
|
|
|
|
|
|
class FlowLayout(QLayout):
|
|
def __init__(self, parent=None, margin=0, spacing=-1):
|
|
super(FlowLayout, self).__init__(parent)
|
|
|
|
if parent is not None:
|
|
self.setContentsMargins(margin, margin, margin, 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 Qt.Orientations(Qt.Orientation(0))
|
|
|
|
def hasHeightForWidth(self):
|
|
return True
|
|
|
|
def heightForWidth(self, width):
|
|
height = self.doLayout(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 = QSize()
|
|
|
|
for item in self.itemList:
|
|
size = size.expandedTo(item.minimumSize())
|
|
|
|
margin, _, _, _ = self.getContentsMargins()
|
|
|
|
size += QSize(2 * margin, 2 * margin)
|
|
return size
|
|
|
|
def horizontalSpacing(self):
|
|
return self.smartSpacing(QStyle.PM_LayoutHorizontalSpacing)
|
|
|
|
def verticalSpacing(self):
|
|
return self.smartSpacing(QStyle.PM_LayoutVerticalSpacing)
|
|
|
|
def doLayout(self, rect, testOnly):
|
|
left, top, right, bottom = self.getContentsMargins()
|
|
effectiveRect = rect.adjusted(+left, +top, -right, -bottom)
|
|
x = effectiveRect.x()
|
|
y = effectiveRect.y()
|
|
lineHeight = 0
|
|
|
|
for item in self.itemList:
|
|
wid = item.widget()
|
|
if wid.isHidden():
|
|
continue
|
|
spaceX = self.spacing() + wid.style().layoutSpacing(QSizePolicy.PushButton, QSizePolicy.PushButton,
|
|
Qt.Horizontal)
|
|
spaceY = self.spacing() + wid.style().layoutSpacing(QSizePolicy.PushButton, QSizePolicy.PushButton,
|
|
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(QRect(QPoint(x, y), item.sizeHint()))
|
|
|
|
x = nextX
|
|
lineHeight = max(lineHeight, item.sizeHint().height())
|
|
|
|
return y + lineHeight - rect.y()
|