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Infragistics2.Win.v7.2 |
| Infragistics.Win Namespace > UIElement Class : IsDrawing Property |
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Infragistics2.Win.v7.2 |
| Infragistics.Win Namespace > UIElement Class : IsDrawing Property |
True if this element is in a drawing operation (read-only).
[Visual Basic]
Public ReadOnly Property IsDrawing As Boolean[C#]
public bool IsDrawing {get;}This sample initializes the appearance of a UIElement based on the mouse position within the element. It also exemplifies the use of mouse hover notifications.
[Visual Basic]
Imports Infragistics.Win
Private mouseEnteredElement As Boolean = False
Private mouseHoveringOnElement As Boolean = False
Protected Overrides Sub InitAppearance(ByRef appearance As AppearanceData, ByRef requestedProps As AppearancePropFlags)
MyBase.InitAppearance(appearance, requestedProps)
' Set BackColor based on whether or not mouse is over
' the element.
If (Me.mouseHoveringOnElement) Then
appearance.BackColor = Color.Green
ElseIf (Me.mouseEnteredElement) Then
appearance.BackColor = Color.Red
Else
appearance.BackColor = Color.Transparent
End If
End Sub
Protected Overrides Sub OnMouseEnter()
Me.mouseEnteredElement = True
' Call when sub UIElements need to simply be repainted (color change etc).
If Not Me.IsDrawing then
Me.Invalidate()
End If
End Sub
Protected Overrides Sub OnMouseHover()
Me.mouseHoveringOnElement = True
' Call when sub UIElements need to be repositioned or sized.
Me.DirtyChildElements()
End Sub
Protected Overrides Sub OnMouseLeave()
Me.mouseHoveringOnElement = False
Me.mouseEnteredElement = False
If Not Me.IsDrawing then
Me.Invalidate()
End If
End Sub
Protected Overrides ReadOnly Property WantsMouseHoverNotification() As Boolean
Get
Return True
End Get
End Property[C#]
using Infragistics.Win;
private bool mouseEnteredElement = false;
private bool mouseHoveringOnElement = false;
protected override void OnMouseHover()
{
this.mouseHoveringOnElement = true;
// Call when sub UIElements need to be repositioned or sized.
this.DirtyChildElements();
}
protected override bool WantsMouseHoverNotification
{
get
{
return true;
}
}
protected override void OnMouseEnter()
{
this.mouseEnteredElement = true;
// Call when sub UIElements need to simply be repainted (color change etc).
if (!this.IsDrawing)
this.Invalidate();
}
protected override void OnMouseLeave()
{
this.mouseHoveringOnElement = false;
this.mouseEnteredElement = false;
// Call when sub UIElements need to simply be repainted (color change etc).
if (!this.IsDrawing)
this.Invalidate();
}
protected override void InitAppearance(ref AppearanceData appearance, ref AppearancePropFlags requestedProps)
{
base.InitAppearance(ref appearance, ref requestedProps);
// Set BackColor based on whether or not mouse is over
// the element.
if(this.mouseHoveringOnElement)
appearance.BackColor = Color.Green;
else if(this.mouseEnteredElement)
appearance.BackColor = Color.Red;
else
appearance.BackColor = Color.Transparent ;
}