mirror of
https://github.com/wassname/sloth.git
synced 2026-06-30 04:19:51 +08:00
Martin Baeuml
105 lines
3.2 KiB
Python
105 lines
3.2 KiB
Python
from PyQt4.QtCore import Qt, QRect, QSize, QPoint
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from PyQt4.QtGui import QLayout, QSizePolicy, QWidgetItem
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class FloatingLayout(QLayout):
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def __init__(self, parent=None):
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QLayout.__init__(self, parent)
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self._items = []
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self._updateMinimumSize()
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def _updateMinimumSize(self, height=None):
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w, h = 0, 0
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for item in self._items:
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w = max(w, item.minimumSize().width())
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h = max(h, item.minimumSize().height())
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left, top, right, bottom = self.getContentsMargins()
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w += left + right
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h += top + bottom
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if height is None:
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current_width = self.contentsRect().width()
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if current_width > 0:
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height = self.heightForWidth(current_width + left + right)
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if height is not None:
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h = max(h, height)
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self._min_w, self._min_h = w, h
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def _layoutChildren(self, rect, appl=True):
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left, top, right, bottom = self.getContentsMargins()
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r = rect.adjusted(+left, +top, -right, -bottom)
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x, y = r.x(), r.y()
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lineHeight = 0
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for item in self._items:
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wid = item.widget()
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spaceX = wid.style().layoutSpacing(QSizePolicy.PushButton, QSizePolicy.PushButton, Qt.Horizontal)
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spaceY = wid.style().layoutSpacing(QSizePolicy.PushButton, QSizePolicy.PushButton, Qt.Vertical)
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sz_hint = item.sizeHint()
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if x != r.x() and x + sz_hint.width() >= r.right():
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# start new line
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x = r.x()
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y += lineHeight + spaceY
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lineHeight = 0
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if appl:
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item.setGeometry(QRect(QPoint(x, y), sz_hint))
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x += sz_hint.width() + spaceX
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lineHeight = max(lineHeight, sz_hint.height())
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return y + lineHeight - r.y() + top + bottom
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def heightForWidth(self, width):
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return self._layoutChildren(QRect(0, 0, width, 0), False)
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def setGeometry(self, r):
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QLayout.setGeometry(self, r)
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new_height = self._layoutChildren(r)
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if new_height != self._min_h:
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self._updateMinimumSize(new_height)
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i = 0
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wid = self.parentWidget()
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while wid is not None:
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wid.updateGeometry()
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wid = wid.parentWidget()
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i += 1
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def insertItem(self, pos, item):
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self._items.insert(pos, item)
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self.invalidate()
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def insertWidget(self, pos, wid):
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self.addChildWidget(wid)
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self.insertItem(pos, QWidgetItem(wid))
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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 hasHeightForWidth(self):
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return True
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def itemAt(self, index):
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if index < 0 or index >= len(self._items):
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return None
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return self._items[index]
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def minimumSize(self):
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return QSize(self._min_w, self._min_h)
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def takeAt(self, index):
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if index < 0 or index >= len(self._items):
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return None
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else:
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item = self._items[index]
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del self._items[index]
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return item
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def sizeHint(self):
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return self.minimumSize()
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