="{Binding Path=Panel.Scale, ElementName=myDiagram}" is not working?

GoXam
1

DiagramPanel.Scale is a dependency property, so you can data bind to it. In XAML: …="{Binding Path=Panel.Scale, ElementName=myDiagram}"

2

That should work. For example, here’s an example usage for that same dependency property:

<TextBlock Text="{Binding Path=Panel.Scale, ElementName=myDiagram, Converter={StaticResource theFormattingConverter}, ConverterParameter='\{0:F2\}'}" />
3

How to set MinimumScale and MaximumScale of Diagram according to Slider.
Tried setting

myDiagram.Panel.MinimumScale = myLogScaleSlider.Minimum;
myDiagram.Panel.MaximumScale = myLogScaleSlider.Maximum;

But it not works in sample OrgChart static.

4

What values were they? The MinimumScale must be greater than zero and less than or equal to one. The MaximumScale must be one or more.

5

In OrgChart example you have used slider to control zoom in & out. And also provided mouse wheel control.
Even though slider reaches on either ends you can zoom further. how to set maximum and minimum limit according to slider.

Regards

6

I would set the Slider’s properties based on the DiagramPanel’s properties.

myLogScaleSlider.Minimum = myDiagram.Panel.MinimumScale;
myLogScaleSlider.Maximum = myDiagram.Panel.MaximumScale;

Or set them both to some reasonable constant values.

7

I tried as you said but its not working as required? Can you please check? And provide sample

Regards

8

What values did it set?

9

OK, I just tried modifying the Org Chart’s log-scale Slider. All I did was add these two lines into the initialization of the slider:

        myLogScaleSlider.Minimum = Math.Log(myDiagram.Panel.MinimumScale, 2);
        myLogScaleSlider.Maximum = Math.Log(myDiagram.Panel.MaximumScale, 2);

Everything worked as I expected.

10

How do i set myDiagram.Panel.minimumScale. i.e., Graph should not become completely invisible.

11

That depends on how large your diagram/model is and how large your individual nodes and links are. I suggest you try various diagrams in your app and decide on what you think is a reasonable minimum and a reasonable maximum. Both should not be “too far” from 1.

12

Is this What you are saying?

myDiagram.Panel.MinimumScale = Math.Log(2, 2);
myDiagram.Panel.MaximumScale = Math.Log(-4, 2);

13

Probably not. You do know what those evaluate to, don’t you?

I cannot judge what you will find suitable for your app.

14

Ok i while try

Regards

15

Can you provide sample range for orgChart?

16

No, you can do that.