[pyqtgraph] Getting the hang of mouse events for drawing purposes

[Friedrich]

Hi all

I am currently trying/struggling with the mouse interaction... I might have
just passed the correct lines in the documentation but i just can't get it
to work. What I want to achieve is getting the starting positon (mouse
button pressed), the moving event (hovering...) and when I am finished
dragging the mouse (mouse button release).

The following is a very crude MWE... can somebody help?

#!/usr/bin/env python
import sys

from PyQt5.QtWidgets import QApplication, QMainWindow, QToolBar, QAction
import pyqtgraph as pqg


class Builder(QMainWindow):

def __init__(self, parent=None):
super(Builder, self).__init__(parent)
self.setupWidget()

def setupWidget(self):
self.toolbar = Toolbar(self)
self.addToolBar(self.toolbar)

self.win = pqg.GraphicsWindow()
self.canvas = self.win.addPlot(row=1, col=0)
self.canvas.showGrid(x=True, y=True)

self.scene = self.canvas.scene()
self.scene.sigMouseHover.connect(self.onMouseHover)
self.scene.sigMouseClicked.connect(self.onMouseClick)
print(self.scene.parent)
print(dir(self.scene))

self.setCentralWidget(self.win)

def onMouseMove(self, events):
print("MOVE", events)
pos = events[0]
x = self.canvas.vb.mapSceneToView(pos).x()
y = self.canvas.vb.mapSceneToView(pos).y()
# print(x, y)

def onMouseClick(self, events):
print("LENGTH", len(self.scene.clickEvents))
print("CLICK", events)
evts = self.scene.clickEvents
print(evts)
# for ev in evts:
# print(ev.pos())
# print(ev.lastPos())

def onMouseHover(self, events):
print("LENGTH", len(self.scene.clickEvents))
print("HOVER", events)
evts = self.scene.clickEvents
print(evts)
# for ev in evts:
# print(ev.pos())
# print(ev.lastPos())



class Toolbar(QToolBar):

def __init__(self, parent=None):
"""."""
super(Toolbar, self).__init__(parent)
self.setupWidget()

def setupWidget(self):
self.setMovable(True)
self.setFloatable(True)
self.rect = QAction("rect", checkable=True)

self.addAction(self.rect)



if __name__ == '__main__':
app = QApplication(sys.argv)
app.setApplicationName("hulk_mad.py")

main = Builder()
main.show()

sys.exit(app.exec_())

:-/ .. I have to confess that I am a biiiiiit frustrated