44 lines
969 B
Python
44 lines
969 B
Python
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import goocanvas
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class CanvasBox(goocanvas.Group):
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VERTICAL = 0
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HORIZONTAL = 1
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def __init__(self, grid, orientation, padding=0):
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goocanvas.Group.__init__(self)
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self._grid = grid
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self._orientation = orientation
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self._padding = padding
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self._constraints = {}
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self.connect('child-added', self._child_added_cb)
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self.connect('child-removed', self._child_removed_cb)
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def set_constraints(self, item, width, height):
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self._constraints[item] = [width, height]
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def _layout(self):
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x = self._padding
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y = self._padding
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i = 0
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while i < self.get_n_children():
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item = self.get_child(i)
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[width, height] = self._constraints[item]
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self._grid.set_constraints(item, x, y, width, height)
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if self._orientation == CanvasBox.VERTICAL:
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y += height + self._padding
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else:
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x += width + self._padding
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i += 1
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def _child_added_cb(self, item, position):
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self._layout()
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def _child_removed_cb(self, item, position):
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self._layout()
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