The diagram image inside the overview should not change in size when in FitAll mode. Call the Overview.setFitAll(true) method to enable that mode. Otherwise the overview's ScaleFactor is combined with the diagram's one and the overview follows the diagram's zoom level.

Stoyan

Actually the overview does not allow using a scale larger than the diagram's one, which would happen if a very small zoom factor is set in the FlowChart object. If you wish to enable this, replace the last line in the void fit() method in FlowChart.java -

scaleFactor = Math.min(100.0f, 100.0f / ratio);

with

scaleFactor = 100.0f / ratio;

Or disable setting a zoom factor that would make the diagram smaller than its containing frame.

Stoyan

Hi,

Ok, that method is in Overview.java.

If you prefer to disable zoom out to a very small scale - take a look at how the overview's scaleFactor is calculated in fit(). Use a similar code to check if the new zoom you would set will lead to scaleFactor > 100, and if so - disable the zoom out command in your application.

Stoyan

Hi,

I've meant you can modify the code and rebuild the .jar file to enable the overview's scale to be larger than the flowchart's one. That's until we decide why that check is there at all. It has been ported from the ActiveX version of the overview, which is several years old, and now we can't see a reason why it should be there 

Stoyan

Hi,

I have sent you another PM with a version that removes this limitation.

Stoyan

It works ok in my test project. What is your Overview initialization code, and the flowchart's initial zoom level?

Stoyan

How big is your flowchart after calling resizeToFitItems()?

The only thing we have changed in the Overview in the last three months is changing a line in the fit() method from

scaleFactor = Math.min(100.0f, 100.0f / ratio);

to

scaleFactor = 100.0f / ratio;

That was done in order to let the overview have a larger scale than the flowchart itself, as you requested. I can't think of any reason why this would make the overview control disappear. Could you try showing the standard Overview control, instead of your extended class?

Stoyan