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Normal Topic Moving a selection of boxes (Read 1364 times)
J Bolster
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Moving a selection of boxes
Jul 18th, 2006 at 2:29pm
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Hi,

I am looking to move multiple selected boxes using code. I am calculating the middle point of the selection rectangle and the point the center should move to. THen working out the difference and going through each box (in FC.Selection.Objects) and using the box.move function to move them.

However, if I try to move the same selection of boxes twice, it fails. I have worked out that the flowchart component isn't updating the BoundingRect property of the selection.

Is there a way to force this property to update to the new location? Or would it require a reselection?

Thanks,
Jonathon
  
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Stoyo
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Re: Moving a selection of boxes
Reply #1 - Jul 18th, 2006 at 2:58pm
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Hi Jonathon,

Selection.BoundingRect returns a cached value which is not updated when boxes are moved via the API. Instead of that property, you could copy the following method from the Selection class and use it to find the selection bounds:

private void recalcRect()
{
rect = new RectangleF(0, 0, 0, 0);
foreach (ChartObject obj in selectedItems)
rect = Utilities.unionNonEmptyRects(rect, obj.BoundingRect);
}

Or you might call selection.Toggle twice for some box to force the selection BoundingRect to update.

Stoyan
  
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J Bolster
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Re: Moving a selection of boxes
Reply #2 - Jul 18th, 2006 at 8:12pm
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That's perfect! Thanks a lot

Smiley
  
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