cola/widgets/standard.py

   1 from PyQt4 import QtGui
   2
   3
   4 def create_standard_widget(qtclass):
   5     """Create a standard widget derived from a qt class.
   6     """
   7     class StandardWidget(qtclass):
   8         # Mix-in for standard view operations
   9         def __init__(self, parent=None):
  10             self._qtclass = qtclass
  11             self._qtclass.__init__(self, parent)
  12
  13         def show(self):
  14             """Automatically centers dialogs"""
  15             if self.parent():
  16                 left = self.parent().x()
  17                 width = self.parent().width()
  18                 center_x = left + width/2
  19
  20                 x = center_x - self.width()/2
  21                 y = self.parent().y()
  22
  23                 self.move(x, y)
  24             # Call the base Qt show()
  25             self._qtclass.show(self)
  26
  27         def name(self):
  28             """Returns the name of the view class"""
  29             return self.__class__.__name__.lower()
  30
  31         def apply_state(self, state):
  32             """Imports data for view save/restore"""
  33             try:
  34                 self.resize(state['width'], state['height'])
  35             except:
  36                 pass
  37             try:
  38                 self.move(state['x'], state['y'])
  39             except:
  40                 pass
  41
  42         def export_state(self):
  43             """Exports data for view save/restore"""
  44             return {
  45                 'x': self.x(),
  46                 'y': self.y(),
  47                 'width': self.width(),
  48                 'height': self.height(),
  49             }
  50
  51     return StandardWidget
  52
  53
  54 # The base class for all cola QDialogs.
  55 Dialog = create_standard_widget(QtGui.QDialog)
  56 MainWindow = create_standard_widget(QtGui.QMainWindow)