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    <p>If you are performing long operation, you need either move it to separate thread or call <code>QApplication::processEvents()</code> periodically. It allows GUI to remain responsible. Here is a simple example:</p> <pre><code>from PySide import QtGui, QtCore import time class MyWidget(QtGui.QWidget): def __init__(self): QtGui.QWidget.__init__(self) layout = QtGui.QVBoxLayout(self) self.label = QtGui.QLabel() self.button_start = QtGui.QPushButton("Start") self.button_stop = QtGui.QPushButton("Stop") self.button_stop.setEnabled(False) self.button_pause = QtGui.QPushButton("Pause") self.button_pause.setEnabled(False) layout.addWidget(self.label) layout.addWidget(self.button_start) layout.addWidget(self.button_stop) layout.addWidget(self.button_pause) self.button_start.clicked.connect(self.processing) self.button_pause.clicked.connect(self.pause) self.button_stop.clicked.connect(self.stop) def processing(self): self.button_start.setEnabled(False) self.button_stop.setEnabled(True) self.button_pause.setEnabled(True) self.stop_requested = False self.paused = False i = 0 while not self.stop_requested: QtGui.QApplication.processEvents() if self.paused: time.sleep(0.1) else: i += 1 self.label.setText(unicode(i)) self.button_start.setEnabled(True) self.button_stop.setEnabled(False) self.button_pause.setEnabled(False) def pause(self): self.paused = not self.paused def stop(self): self.stop_requested = True if __name__ == '__main__': import sys app = QtGui.QApplication(sys.argv) widget = MyWidget() widget.show() sys.exit(app.exec_()) </code></pre>
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    1. COI tried your example and it does what I need it to do, however when its running it takes > 90 of the CPU..could you tell me why or how to get around that ?
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    2. COFixed CPU usage when paused.
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    3. COit seems to do fine when it is paused even the first part of your code, however it is when its displaying the numbers that it actually eats up all the CPU
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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