CustomOverview functionality using MouseMove.
CustomOverview functionality using MouseMove
Syncfusion WinForms Diagram supports for the creation of own custom overview control from the predefined OverviewControl.
The following code snippet is used to add an overview control in diagram
[C#]
CustomOverView overview1 = new CustomOverView(); //Positioning the overview control using DockStyle overview1.Dock = DockStyle.Right; overview1.Diagram = diagram2; this.Controls.Add(overview1);
[VB]
Dim overview1 As New CustomOverView() ‘Positioning the overview control using DockStyle overview1.Dock = DockStyle.Right overview1.Diagram = diagram2 Me.Controls.Add(overview1)
The below code shows customizing the overview control.
[C#]
class CustomOverView : OverviewControl
{
bool action = false;
public CustomOverView()
: base()
{
}
}
[VB]
Friend Class CustomOverView Inherits OverviewControl Private action As Boolean = False Public Sub New() MyBase.New() End Sub End Class
The overview control only displays the diagram’s impact when mouse up event is fired. This can be customized by displaying the impact when the mouse is moved.
The below code snippet shows how to customize the overview control.
[C#]
protected override void OnMouseMove(System.Windows.Forms.MouseEventArgs meargs)
{
base.OnMouseMove(meargs);
if (action)
{
if ((this.dgmModel != null) && (this.dgmView != null))
{
// Creates an impact of diagram control while moving
if (this.ptDragStart != Point.Empty)
{
bViewportInitiated = true;
if (this.dragMarker != RectMarkers.Viewport)
{
this.vpRenderer.SizingRect = RectangleF.Empty;
if ((this.rcInDragArea.Width > 5) && (this.rcInDragArea.Height > 5))
this.ViewportBounds = this.rcInDragArea;
}
}
}
if (dgmView != null)
{
// Set the view origin based on the viewport's pan location.
PointF origin = new PointF(
(this.ViewportBounds.X - this.rcDisplayArea.X) / this.scaleFactor,
(this.ViewportBounds.Y - this.rcDisplayArea.Y) / this.scaleFactor);
this.View.Origin = new PointF(origin.X, origin.Y);
}
Diagram.Invalidate();
this.dgmModel.EndUpdate();
}
}
[VB]
Protected Overrides Sub OnMouseMove(ByVal meargs As System.Windows.Forms.MouseEventArgs) MyBase.OnMouseMove(meargs) If action Then If (Me.dgmModel IsNot Nothing) AndAlso (Me.dgmView IsNot Nothing) Then If Me.ptDragStart <> Point.Empty Then bViewportInitiated = True If Me.dragMarker <> RectMarkers.Viewport Then Me.vpRenderer.SizingRect = RectangleF.Empty If (Me.rcInDragArea.Width > 5) AndAlso (Me.rcInDragArea.Height > 5) Then Me.ViewportBounds = Me.rcInDragArea End If End If End If End If If dgmView IsNot Nothing Then ‘Set the view origin based on the viewport's pan location. Dim origin As New PointF((Me.ViewportBounds.X - Me.rcDisplayArea.X) / Me.scaleFactor, (Me.ViewportBounds.Y - Me.rcDisplayArea.Y) / Me.scaleFactor) Me.View.Origin = New PointF(origin.X, origin.Y) End If Diagram.Invalidate() Me.dgmModel.EndUpdate() End If End Sub
Conclusion
I hope you enjoyed learning about how to customOverview functionality using MouseMove.
You can refer to our WinForms Diagram feature tour page to know about its other groundbreaking feature representations. You can also explore our WinForms Diagram documentation to understand how to create and manipulate data.
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