I suggest you extend the PlotItem class and then intercept the mouse clicks
and drags.
import pyqtgraph as pg
from pyqtgraph.Qt import QtCore, QtGui
class EZPlotWidget(pg.PlotItem):
def __init__(self, *args, **kwds):
super().__init__(*args, **kwds)
def mouseClickEvent(self, evt):
if mode == 'Paint'
if evt.button() == QtCore.Qt.RightButton:
evt.accept() # This will intercept the event and
def mouseDragEvent(self, evt):
if evt.button() == QtCore.Qt.RightButton:
evt.ignore()
else:
pass
On Thursday, January 11, 2018 at 4:45:00 AM UTC-7, Marco wrote:
>
> Hi,
> many thanks to Luke for the great work with Pyqtgraph.
> I need to temporarily disable pan in ViewBox and remap mouse interaction.
>
> The program must have two modes:
> 1. View/explore image mode.
> ViewBox in normal mode (mouse click and drag for panning).
> 2. Paint with mouse mode (No pan with mouse click and drag).
> Mouse click, move and release must run functions. I will use those
> functions for drawing on numpy array.
>
> I must switch between modes with a button.
>
> Here the code:
> #####################################
> #####################################
> from pyqtgraph.Qt import QtGui
> import numpy as np
> import pyqtgraph as pg
> import sys
>
> pg.setConfigOptions(antialias=True)
> app = QtGui.QApplication([])
> win = pg.GraphicsWindow()
> vb = win.addViewBox()
> vb.setAspectLocked()
>
> # Create an array of data
> x = np.linspace(0, 10)
> y = x[:]
> xx, yy = np.meshgrid(x, y)
> img = np.sin(xx) + np.cos(yy)
>
> # Plot the array on ViewBox
> imm = pg.ImageItem(img)
> vb.addItem(imm)
>
> ###########
> # Code to be activate in paint mode
> def mouseMoved(pos):
> position = imm.mapFromScene(pos)
> row, col = int(position.y()), int(position.x())
> print("Moved to ", row, col)
>
> def mouseClicked(pos):
> position = imm.mapFromScene(pos)
> row, col = int(position.y()), int(position.x())
> print("Clicked at ", row, col)
> # Note: incorrect function
>
> def mouseReleased(pos):
> position = imm.mapFromScene(pos)
> row, col = int(position.y()), int(position.x())
> print("Released at ", row, col)
> # Note: incorrect function
>
> win.scene().sigMouseClicked.connect(mouseClicked)
> win.scene().sigMouseMoved.connect(mouseMoved)
> win.scene().sigMouseReleased.connect(mouseReleased) # Note: incorrect
>
> # End paint mode
> ###########
>
> win.show()
> sys.exit(app.exec_())
>
> #####################################
> #####################################
>
> My questions:
> 1. how to disable (and after re-enable) mouse pan?
> 2. how to get coordinates when I click and release mouse button?
>
> Thanks for your help.
> mm
>
>
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