From ba31b3d7ba22b498807845ff14668afa450de7be Mon Sep 17 00:00:00 2001
From: Luke Campagnola <>
Date: Tue, 28 May 2013 18:47:33 -0400
Subject: [PATCH] Legends can be dragged by user
---
.../graphicsItems/GraphicsWidgetAnchor.py | 45 +++++++++++++++++++
pyqtgraph/graphicsItems/LegendItem.py | 12 +++--
2 files changed, 54 insertions(+), 3 deletions(-)
diff --git a/pyqtgraph/graphicsItems/GraphicsWidgetAnchor.py b/pyqtgraph/graphicsItems/GraphicsWidgetAnchor.py
index 3174e6e0..251bc0c8 100644
--- a/pyqtgraph/graphicsItems/GraphicsWidgetAnchor.py
+++ b/pyqtgraph/graphicsItems/GraphicsWidgetAnchor.py
@@ -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
diff --git a/pyqtgraph/graphicsItems/LegendItem.py b/pyqtgraph/graphicsItems/LegendItem.py
index a2fc0e04..6c42fb4c 100644
--- a/pyqtgraph/graphicsItems/LegendItem.py
+++ b/pyqtgraph/graphicsItems/LegendItem.py
@@ -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):
--
GitLab