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AxisItem bugfix: corrected x-linked view update behavior

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Added MultiplePlotAxes example
This commit is contained in:
Luke Campagnola 2013-03-19 11:49:10 -04:00
parent 87f45186d8
commit 4716a84117
2 changed files with 72 additions and 8 deletions
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67
examples/MultiplePlotAxes.py Normal file
View File

@ -0,0 +1,67 @@
# -*- coding: utf-8 -*-
"""
Demonstrates a way to put multiple axes around a single plot.
(This will eventually become a built-in feature of PlotItem)
"""
import initExample ## Add path to library (just for examples; you do not need this)
import pyqtgraph as pg
from pyqtgraph.Qt import QtCore, QtGui
import numpy as np
pg.mkQApp()
pw = pg.PlotWidget()
pw.show()
pw.setWindowTitle('pyqtgraph example: MultiplePlotAxes')
p1 = pw.plotItem
p1.setLabels(left='axis 1')
## create a new ViewBox, link the right axis to its coordinate system
p2 = pg.ViewBox()
p1.showAxis('right')
p1.scene().addItem(p2)
p1.getAxis('right').linkToView(p2)
p2.setXLink(p1)
p1.getAxis('right').setLabel('axis2', color='#0000ff')
## create third ViewBox.
## this time we need to create a new axis as well.
p3 = pg.ViewBox()
ax3 = pg.AxisItem('right')
p1.layout.addItem(ax3, 2, 3)
p1.scene().addItem(p3)
ax3.linkToView(p3)
p3.setXLink(p1)
ax3.setZValue(-10000)
ax3.setLabel('axis 3', color='#ff0000')
## Handle view resizing
def updateViews():
## view has resized; update auxiliary views to match
global p1, p2, p3
p2.setGeometry(p1.vb.sceneBoundingRect())
p3.setGeometry(p1.vb.sceneBoundingRect())
## need to re-update linked axes since this was called
## incorrectly while views had different shapes.
## (probably this should be handled in ViewBox.resizeEvent)
p2.linkedViewChanged(p1.vb, p2.XAxis)
p3.linkedViewChanged(p1.vb, p3.XAxis)
updateViews()
p1.vb.sigResized.connect(updateViews)
p1.plot([1,2,4,8,16,32])
p2.addItem(pg.PlotCurveItem([10,20,40,80,40,20], pen='b'))
p3.addItem(pg.PlotCurveItem([3200,1600,800,400,200,100], pen='r'))
## Start Qt event loop unless running in interactive mode or using pyside.
if __name__ == '__main__':
import sys
if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
QtGui.QApplication.instance().exec_()

13
pyqtgraph/graphicsItems/AxisItem.py
View File

@ -314,10 +314,13 @@ class AxisItem(GraphicsWidget):
view.sigResized.connect(self.linkedViewChanged)
def linkedViewChanged(self, view, newRange=None):
if self.orientation in ['right', 'left'] and view.yInverted():
if self.orientation in ['right', 'left']:
if newRange is None:
newRange = view.viewRange()[1]
self.setRange(*newRange[::-1])
if view.yInverted():
self.setRange(*newRange[::-1])
else:
self.setRange(*newRange)
else:
if newRange is None:
newRange = view.viewRange()[0]
@ -330,18 +333,12 @@ class AxisItem(GraphicsWidget):
## extend rect if ticks go in negative direction
## also extend to account for text that flows past the edges
if self.orientation == 'left':
#rect.setRight(rect.right() - min(0,self.tickLength))
#rect.setTop(rect.top() - 15)
#rect.setBottom(rect.bottom() + 15)
rect = rect.adjusted(0, -15, -min(0,self.tickLength), 15)
elif self.orientation == 'right':
#rect.setLeft(rect.left() + min(0,self.tickLength))
rect = rect.adjusted(min(0,self.tickLength), -15, 0, 15)
elif self.orientation == 'top':
#rect.setBottom(rect.bottom() - min(0,self.tickLength))
rect = rect.adjusted(-15, 0, 15, -min(0,self.tickLength))
elif self.orientation == 'bottom':
#rect.setTop(rect.top() + min(0,self.tickLength))
rect = rect.adjusted(-15, min(0,self.tickLength), 15, 0)
return rect
else: