UWP Diagram (SfDiagram) Overview
8 Nov 2019 / 1 minute to read
Overview control is used to display a preview (overall view) of the entire content of a Diagram. This helps you to look overall picture of large Diagram and also to navigate (pan or zoom) to a particular position of the page.
When you work on a very large Diagram, You may not know the part where you are actually working or navigation from one part to another might be a difficult. To navigation, you can zoom out entire Diagram and find where you are. This solution is not suitable when you need some frequent navigation.
Overview control solved this problem by displaying a preview (overall view) of the entire Diagram. A rectangle indicated viewport of the Diagram. Navigation becomes easy by dragging this rectangle.
NOTE
Supported platform: WPF, WinRT 8.1, Universal, UWP
Create Overview
The following code example explains how to add Overview to an Application.
<!--Initializes the overview control-->
<overview:Overview Source="{Binding ElementName=diagramControl}" Height="300" Margin="0,25,0,0"/>
Refer to the Overview Sample from the following link.
Sample Link: Overview.
Zoom Pan
In overview, the view port of the Diagram is highlighted with a red colored rectangle. Diagram can be zoomed/panned by interacting with that. You can interact with overview as follows.
| Property | Description | Type | DataType |
|---|---|---|---|
| Constraint | Gets or Sets the OverviewConstraints. | Dependency property | Enum OverviewConstraints OverviewConstraints.None OverviewConstraints.Pan OverviewConstraints.TapFocus OverviewConstraints.DrawFocus OverviewConstraints.Zoom |
| FocusBrush | Specifies the color of the viewport area in the preview. | Dependency Property | Brush |
| UnFocusBrush | Specifies the background of the extended area in the preview. | Dependency Property | Brush |