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POresizing a dialog with PyQt4
 

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    <p>I have this sample of code:</p> <pre><code>import sys from PyQt4.QtGui import (QApplication, QHBoxLayout, QVBoxLayout, QDialog, QFrame, QPushButton, QComboBox) class Form(QDialog): def __init__(self, parent=None): super(Form, self).__init__(parent) moreButton = QPushButton('moreButton') moreButton.setCheckable(True) resizeButton = QPushButton('Resize') combo = QComboBox() combo.addItems(['item1', 'item2']) layout1 = QHBoxLayout() layout1.addWidget(moreButton) layout1.addWidget(resizeButton) layout2 = QHBoxLayout() layout2.addWidget(combo) self.frame = QFrame() self.frame.setLayout(layout2) self.frame.hide() layout3 = QVBoxLayout() layout3.addLayout(layout1) layout3.addWidget(self.frame) moreButton.toggled.connect(self.frame.setVisible) moreButton.clicked.connect(self.method) resizeButton.clicked.connect(self.method) self.setLayout(layout3) self.resize(630, 50) def method(self): if self.frame.isVisible(): self.resize(630, 150) else: self.resize(630, 250) app = QApplication(sys.argv) form = Form() form.show() app.exec_() </code></pre> <p>I run it and when moreButton clicked the ComboBox appears or disappears. Dialog's size also changes. But if I change the method to:</p> <pre><code>def method(self): if self.frame.isVisible(): self.resize(630, 150) else: self.resize(630, 50) </code></pre> <p>(in order to set the initial size when combo is hidden) the resizing does not work. However, if I click resizeButton -which is connected to the same method- the resizing works properly. </p> <p>I know that there are other ways to achieve such a result (eg. layout.setSizeConstraint(QLayout.SetFixedSize)), but I want to declare size explicitly. </p> <p>What am I doing wrong?</p>
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