Is there a method to fit the width of a graph to the viewer's Width

[wvdvegt]

Is there a method to fit the width of a graph to the viewer's Width and leave the aspect ratio as is (so a Fit to Width option). I need it for readability purposes.

Now, by default, the graph seems to be made completely visible while maintaining the aspect ratio. Now I have to zoom in/out everytime i load/create a graph.

[levnach]

What viewer do you use?

[wvdvegt]

Using informs so I think it's the gdi one.

[levnach]

There is proprety GViewer.ZoomF that can set the scale. Also have a look at GViewer.ShowGroup(), and GViewer.ShowBBox(). The latter can zoom in on anything on the graph.

[wvdvegt]

ZoomF I already found, but what i want is to fit the with of the bounding box to be the width of the viewer (so only the width and derive the height from the graph width & aspect ratio).

Currently the code fits the whole graph to the viewer which in my case results in a narrow stripe containing the graph in the middle of the viewer.

This is what i get:

And this is how i would like it (preferable with a vertical scrollbar):

[levnach]

Have you looked at

automatic-graph-layout/GraphLayout/tools/GraphViewerGDI/GViewer.cs

Line 1675 in 722cd81

public void ShowBBox(Core.Geometry.Rectangle bb) {

? I think this method will work for you. You need to call it with bb having the width and the top-left taken from the geometry graph bounding box. The height you need to calculate from the aspect ratio of the client rectangle.
I do not remember why there is no scrollbar. Probably it can be enabled.