[PyQt4] Trouble with event handling

[Dodle]

I am connecting widgets with event handlers in PyQt and trying to find the widget that was used. I learned to do this in wxPython:

button1 = wx.Button(self, -1, "Button 1")
    button2 = wx.Button(self, -1, "Button 2")
    button3 = wx.Button(self, -1, "Button 3")
 
    button_group = (button1, button2, button3)
 
    for entry in button_group:
        entry.Bind(wx.EVT_BUTTON, self.onButton)
 
 
def onButton(self, event):
    eventVal = event.GetEventObject()
    labelVal = eventVal.GetLabel()
 
    print "%s pressed" % labelVal

button1 = wx.Button(self, -1, "Button 1")
    button2 = wx.Button(self, -1, "Button 2")
    button3 = wx.Button(self, -1, "Button 3")
    
    button_group = (button1, button2, button3)
    
    for entry in button_group:
        entry.Bind(wx.EVT_BUTTON, self.onButton)


def onButton(self, event):
    eventVal = event.GetEventObject()
    labelVal = eventVal.GetLabel()
    
    print "%s pressed" % labelVal

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But I am having trouble figuring out how to do this with PyQt. This is the only way that I know how to catch events:

button1 = QtGui.QPushButton("Button 1")
    button2 = QtGui.QPushButton("Button 2")
    button3 = QtGui.QPushButton("Button 3")
 
    button_group = [button1, button2, button3]
 
    for entry in button_group:
        self.connect(entry, QtCore.SIGNAL('clicked()'), self.onButton)
 
 
def onButton(self):
    """
    I do not know what to put here.
    """
    pass

button1 = QtGui.QPushButton("Button 1")
    button2 = QtGui.QPushButton("Button 2")
    button3 = QtGui.QPushButton("Button 3")
    
    button_group = [button1, button2, button3]
    
    for entry in button_group:
        self.connect(entry, QtCore.SIGNAL('clicked()'), self.onButton)


def onButton(self):
    """
    I do not know what to put here.
    """
    pass

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[e8johan]

There is the QObject::sender method that you can use. It is not really considered good style, instead, it would be better to use a QSignalMapper.

[Dodle]

I think that I am close:

#! /usr/bin/env python
"""
Mapping
"""
 
import sys
from PyQt4 import Qt
 
class MainWindow(Qt.QWidget):
	def __init__(self):
		Qt.QWidget.__init__(self)
 
		button1 = Qt.QPushButton("Button 1")
		button2 = Qt.QPushButton("Button 2")
		button3 = Qt.QPushButton("Button 3")
 
		self.button_mapper = Qt.QSignalMapper()
 
		button_group = [button1, button2, button3]
 
		for entry in button_group:
			self.connect(entry, Qt.SIGNAL('clicked()'), self.onButton)
			self.button_mapper.setMapping(entry, "blah")
 
		sizer = Qt.QVBoxLayout(self)
		sizer.addWidget(button1, 1)
		sizer.addWidget(button2, 1)
		sizer.addWidget(button3, 1)
 
	def onButton(self):
		eventVal = self.button_mapper.mapping("blah")
		labelVal = eventVal."""What to put here"""()
		print labelVal
 
app = Qt.QApplication(sys.argv)
frame = MainWindow()
frame.show()
sys.exit(app.exec_())

#! /usr/bin/env python
"""
Mapping
"""

import sys
from PyQt4 import Qt

class MainWindow(Qt.QWidget):
	def __init__(self):
		Qt.QWidget.__init__(self)
		
		button1 = Qt.QPushButton("Button 1")
		button2 = Qt.QPushButton("Button 2")
		button3 = Qt.QPushButton("Button 3")
		
		self.button_mapper = Qt.QSignalMapper()
		
		button_group = [button1, button2, button3]
		
		for entry in button_group:
			self.connect(entry, Qt.SIGNAL('clicked()'), self.onButton)
			self.button_mapper.setMapping(entry, "blah")
		
		sizer = Qt.QVBoxLayout(self)
		sizer.addWidget(button1, 1)
		sizer.addWidget(button2, 1)
		sizer.addWidget(button3, 1)

	def onButton(self):
		eventVal = self.button_mapper.mapping("blah")
		labelVal = eventVal."""What to put here"""()
		print labelVal

app = Qt.QApplication(sys.argv)
frame = MainWindow()
frame.show()
sys.exit(app.exec_())

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I just don't know how to get the label off of the button.

[Dodle]

Okay I figured out what to put in the line I was having trouble with before:

labelVal = eventVal.text()

labelVal = eventVal.text()

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But every button I press prints "Button 3". I guessing because it was the last item to be mapped.

[Dodle]

I got some help with this over at ubuntuforums.org:

I believe you are looking for the objectname for a widget.

Say you have a_button = QToolbutton() and have set it's objectName with a_button.setObjectName("spam")

You have also slotted(not sure that's the right term) the button to a function like:

self.connect(a_button, SIGNAL("clicked()"), self.eggs)

The function to find the objectName of the button would look like this.

def eggs(self):

print self.sender().objectName()

Hope that's what you wanted.

I think that this method will work best for what I want to accomplish. Thanks for your help.