Hello,

I'm evaluating FlowChart.net for use in our software. So far, we're quite satisfied with it. However, there are a few wrinkles that we'd like to iron out before making a definite decision.

Our application doesn't need the zoom feature (except in the overview). However, we'd like to have an *exact* 100% zoom and so far, we've not been able to figure out how to do that. Setting the 'ZoomFactor' to 100 does not yield the expected result, i.e. 1px in the FlowChart does not correspond to 1px on the screen.

At the moment, we use a scaling function defined as follows, to normalize all our values:

[code]public float ScaleToZoom(float x) { return x / (ZoomFactor * 3.0f / 100.0f); }[/code]
However, we'd like an exact solution instead of this hack. What are we doing wrong and how to do it right?

PS: I should probably mention that the FlowChart control is used by inheriting from it. Then the subclass is instantiated. The subclass makes the following adjustments to the parent class ('FlowChart') in its constructor:

[code]        public Graph() {
           AllowDrop = false;
           ArrowCrossings = ArrowCrossings.BreakOff;
           ArrowStyle = ArrowStyle.Bezier;
           Behavior = BehaviorType.DoNothing;
           RoundedArrows = true;
           ShadowsStyle = ShadowsStyle.None;
           ZoomFactor = 100;
           // These doc extends are wrong, anyway; I just include them in case they somehow tamper the zoom.
           DocExtents =
               new System.Drawing.RectangleF(0.0f, 0.0f, ScaleToZoom((float)Width), ScaleToZoom((float)Height));
       }[/code]

PS: I've got a few more questions. Should I post them in this same thread or should I open independent threads for them?

And another PS: I guess that quite a few of my questions would be obsolete if there were a documentary (in addition to the examples). We haven't found one. Did we perhaps overlook it?

Hi,

thanks a lot. Seems I need glasses badly. I'll have a look at this help file.