Commit ba31b3d7 authored by Luke Campagnola's avatar Luke Campagnola
Browse files

Legends can be dragged by user

parent 7a7288b6
......@@ -47,7 +47,52 @@ class GraphicsWidgetAnchor(object):
self.__parentAnchor = parentPos
self.__offset = offset
self.__geometryChanged()
def autoAnchor(self, pos, relative=True):
"""
Set the position of this item relative to its parent by automatically
choosing appropriate anchor settings.
If relative is True, one corner of the item will be anchored to
the appropriate location on the parent with no offset. The anchored
corner will be whichever is closest to the parent's boundary.
If relative is False, one corner of the item will be anchored to the same
corner of the parent, with an absolute offset to achieve the correct
position.
"""
pos = Point(pos)
br = self.mapRectToParent(self.boundingRect()).translated(pos - self.pos())
pbr = self.parentItem().boundingRect()
anchorPos = [0,0]
parentPos = Point()
itemPos = Point()
if abs(br.left() - pbr.left()) < abs(br.right() - pbr.right()):
anchorPos[0] = 0
parentPos[0] = pbr.left()
itemPos[0] = br.left()
else:
anchorPos[0] = 1
parentPos[0] = pbr.right()
itemPos[0] = br.right()
if abs(br.top() - pbr.top()) < abs(br.bottom() - pbr.bottom()):
anchorPos[1] = 0
parentPos[1] = pbr.top()
itemPos[1] = br.top()
else:
anchorPos[1] = 1
parentPos[1] = pbr.bottom()
itemPos[1] = br.bottom()
if relative:
relPos = [(itemPos[0]-pbr.left()) / pbr.width(), (itemPos[1]-pbr.top()) / pbr.height()]
self.anchor(anchorPos, relPos)
else:
offset = itemPos - parentPos
self.anchor(anchorPos, anchorPos, offset)
def __geometryChanged(self):
if self.__parent is None:
return
......
......@@ -101,7 +101,6 @@ class LegendItem(GraphicsWidget, GraphicsWidgetAnchor):
label.close()
self.updateSize() # redraq box
def updateSize(self):
if self.size is not None:
return
......@@ -115,15 +114,22 @@ class LegendItem(GraphicsWidget, GraphicsWidgetAnchor):
#print(width, height)
#print width, height
self.setGeometry(0, 0, width+25, height)
def boundingRect(self):
return QtCore.QRectF(0, 0, self.width(), self.height())
def paint(self, p, *args):
p.setPen(fn.mkPen(255,255,255,100))
p.setBrush(fn.mkBrush(100,100,100,50))
p.drawRect(self.boundingRect())
def hoverEvent(self, ev):
ev.acceptDrags(QtCore.Qt.LeftButton)
def mouseDragEvent(self, ev):
if ev.button() == QtCore.Qt.LeftButton:
dpos = ev.pos() - ev.lastPos()
self.autoAnchor(self.pos() + dpos)
class ItemSample(GraphicsWidget):
def __init__(self, item):
......
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