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WPF-985809-Need to update the Reset operation for Zooming and Panning_hotfix #1332

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Parent: DOCINFRA-2341_merged_using_automation
merged 1 commit into from
Oct 8, 2025
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WPF-985809-Need to update the Reset operation for Zooming and Panning_hotfix #1332

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33 changes: 33 additions & 0 deletions WindowsForms/Diagram/Zoom-And-Pan.md
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Original file line number Diff line number Diff line change
Expand Up @@ -253,6 +253,19 @@ zoomTool.ZoomIncrement = 10

![Diagram Zooming particular region using Zoom-Tool](Zoom-And-Pan_images/Zoom-And-Pan_img5.png)

#### Reset Zoom

You can reset the zooming value using the ZoomToActual() method of the view. Programmatically, it is implemented as follows:

{% tabs %}
{% highlight c# %}

diagram1.View.ZoomToActual();

{% endhighlight %}
{% endtabs %}


## Panning Support

Pan tool allows the user to drag the diagram and hence scroll it in any direction.
Expand All @@ -278,3 +291,23 @@ Sample diagram is as follows.


![Diagram Panning](Zoom-And-Pan_images/Zoom-And-Pan_img6.jpeg)

#### Reset Pan

You can reset the panning value by setting the view origin and scroll bounds to their default values. Programmatically, it is implemented as follows:

{% tabs %}
{% highlight c# %}

this.diagram1.BeginUpdate();
this.diagram1.Controller.View.Origin = new PointF(0, 0);
this.diagram1.Controller.View.ScrollVirtualBounds = new RectangleF(0, 0, 0, 0);
//Deactivate pan tool and activate select tool
this.diagram1.ActivateTool("SelectTool");
this.diagram1.EndUpdate();


{% endhighlight %}
{% endtabs %}

This code resets the diagram’s view to the top-left corner and clears any virtual scrolling bounds. It also switches the active tool back to the SelectTool, ensuring that the panning mode is deactivated.