91 lines
2.6 KiB
Python
91 lines
2.6 KiB
Python
from PySide6.QtCore import QMargins, QPoint, QRect, QSize, Qt
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from PySide6.QtWidgets import QLayout, QSizePolicy
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class FlowLayout(QLayout):
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def __init__(self, parent=None):
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super().__init__(parent)
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if parent is not None:
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self.setContentsMargins(QMargins(0, 0, 0, 0))
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self._item_list = []
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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._item_list.append(item)
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def count(self):
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return len(self._item_list)
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def itemAt(self, index):
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if 0 <= index < len(self._item_list):
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return self._item_list[index]
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return None
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def takeAt(self, index):
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if 0 <= index < len(self._item_list):
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return self._item_list.pop(index)
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return None
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def expandingDirections(self):
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return 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._do_layout(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._do_layout(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._item_list:
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size = size.expandedTo(item.minimumSize())
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size += QSize(2 * self.contentsMargins().top(), 2 * self.contentsMargins().top())
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return size
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def _do_layout(self, rect, test_only):
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x = rect.x()
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y = rect.y()
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line_height = 0
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spacing = self.spacing()
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for item in self._item_list:
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style = item.widget().style()
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layout_spacing_x = style.layoutSpacing(
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QSizePolicy.PushButton, QSizePolicy.PushButton, Qt.Orientation.Horizontal
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)
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layout_spacing_y = style.layoutSpacing(QSizePolicy.PushButton, QSizePolicy.PushButton, Qt.Vertical)
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space_x = spacing + layout_spacing_x
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space_y = spacing + layout_spacing_y
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next_x = x + item.sizeHint().width() + space_x
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if next_x - space_x > rect.right() and line_height > 0:
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x = rect.x()
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y = y + line_height + space_y
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next_x = x + item.sizeHint().width() + space_x
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line_height = 0
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if not test_only:
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item.setGeometry(QRect(QPoint(x, y), item.sizeHint()))
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x = next_x
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line_height = max(line_height, item.sizeHint().height())
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return y + line_height - rect.y()
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