Get the Diagram Boundaries

GoXam
1

Hi Walter,

I have a scenario like i have to open a diagram from the XML file.
So when i am opening a Goxam diagram from the xml file,
i have to scale the diagram first and then i have to show the diagram.
For that i have some formulas to calculate scale and that works well.

But the problem as of now, i could able to get the diagram’s height and width from the Diagram.LayoutCompleted event only.
And after that based on the diagram’s height and width and Viewport height and width, i am scaling the diagram.

So at this case, what is happening is that, diagram is shown with the scale what was previously set and then re-scaling to the new one.

I dont want the previous scaled one to be shown, i want only the new re-scaled diagram to be shown.

So is there a way to get the Diagram boundaries before it gets displayed in the Panel rather than getting in Layout Completed event.

Thanks in advance.

2

Well, you need to wait until layouts are completed before you can know how big the area is that the diagram covers. Since you are loading a diagram you probably want to check in the Diagram.InitialLayoutCompleted event, rather than after each transaction/layout.

But if you do want to do it after each transaction, perhaps you don’t need to define an event handler at all – can you just set DiagramPanel.Stretch to Uniform? GoXam for WPF 2.2.4

3

With DiagramPanel.Stretch to Uniform, i could able to achieve ZoomtoFit, but i have other i have to do Zoom to height.

For that i tried with DiagramPanel.Stretch to UniformtoFill, it doesnot work with all the diagrams. Thats the reason i am calculating scale.

4

OK, well then, just set the myDiagram.Panel.Scale and myDiagram.Panel.Position the way that you want.

Remember that the DiagramPanel.Position may be limited by the diagram bounds and viewport.