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94 lines
2.5 KiB
94 lines
2.5 KiB
# coding:utf-8
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from PySide6.QtCore import QSize, QPoint, Qt, QEvent, QRect
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from PySide6.QtGui import QResizeEvent
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from PySide6.QtWidgets import QLayout, QWidget
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class ExpandLayout(QLayout):
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""" Expand layout """
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def __init__(self, parent=None):
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super().__init__(parent)
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self.__items = []
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self.__widgets = []
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def addWidget(self, widget: QWidget):
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if widget in self.__widgets:
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return
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self.__widgets.append(widget)
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widget.installEventFilter(self)
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def addItem(self, item):
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self.__items.append(item)
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def count(self):
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return len(self.__items)
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def itemAt(self, index):
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if 0 <= index < len(self.__items):
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return self.__items[index]
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return None
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def takeAt(self, index):
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if 0 <= index < len(self.__items):
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self.__widgets.pop(index)
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return self.__items.pop(index)
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return None
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def expandingDirections(self):
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return Qt.Vertical
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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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""" get the minimal height according to width """
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return self.__doLayout(QRect(0, 0, width, 0), False)
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def setGeometry(self, rect):
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super().setGeometry(rect)
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self.__doLayout(rect, True)
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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 w in self.__widgets:
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size = size.expandedTo(w.minimumSize())
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m = self.contentsMargins()
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size += QSize(m.left()+m.right(), m.top()+m.bottom())
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return size
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def __doLayout(self, rect, move):
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""" adjust widgets position according to the window size """
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margin = self.contentsMargins()
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x = rect.x() + margin.left()
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y = rect.y() + margin.top() + margin.bottom()
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width = rect.width() - margin.left() - margin.right()
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for i, w in enumerate(self.__widgets):
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y += (i>0)*self.spacing()
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if move:
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w.setGeometry(QRect(QPoint(x, y), QSize(width, w.height())))
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y += w.height()
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return y - rect.y()
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def eventFilter(self, obj, e):
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if obj in self.__widgets:
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if e.type() == QEvent.Resize:
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ds = e.size() - e.oldSize() # type:QSize
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if ds.height() != 0 and ds.width() == 0:
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w = self.parentWidget()
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w.resize(w.width(), w.height() + ds.height())
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return super().eventFilter(obj, e)
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