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POHow to connect a signal from the controller in PyQt4? (iOS like MVC structure in PyQt4)
 

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  1. POHow to connect a signal from the controller in PyQt4? (iOS like MVC structure in PyQt4)
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    <p>Why doesn't the following example work?</p> <pre><code>from PyQt4 import QtGui import sys class TestView(QtGui.QWidget): def __init__(self): super(TestView, self).__init__() self.initUI() def initUI(self): self.btn = QtGui.QPushButton('Button', self) self.btn.resize(self.btn.sizeHint()) self.btn.move(50, 50) class TestViewController(): def __init__(self, view): view.btn.clicked.connect(self.buttonClicked) view.show() def buttonClicked(self): print 'clicked' def main(): app = QtGui.QApplication(sys.argv) view = TestView() TestViewController(view) app.exec_() if __name__ == '__main__': main() </code></pre> <p>The example is supposed to represent an MVC structure (like the one in <a href="http://www.oracle.com/technetwork/articles/javase/index-142890.html" rel="nofollow">Figure 4</a> -- without the Model) where the controller (<code>TestViewController</code>) receives a reference to the view (<code>TestView</code>) and connects the clicked signal from the view's button <code>view.btn</code> to its function <code>self.buttonClicked</code>.</p> <p>I'm sure the line <code>view.btn.clicked.connect(self.buttonClicked)</code> is executed but, apparently, it has no effect. Does anyone knows how to solve that?</p> <hr> <p><strong>Update (awful solution):</strong></p> <p>In the example, if I replace the line</p> <pre><code>view.btn.clicked.connect(self.buttonClicked) </code></pre> <p>with</p> <pre><code>view.clicked = self.clicked view.btn.clicked.connect(view.clicked) </code></pre> <p>it works. I'm still not happy with that.</p>
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