public bool DrawFocus { get; set; }Public Property DrawFocus As Boolean
Get
Setpublic:
property bool DrawFocus {
bool get ();
void set (bool value);
}member DrawFocus : bool with get, setIf true, the image map will draw the default focus frame around the active image area. If false, it will assume that the owner draw event has done so and will not draw it.
For the image map DrawImage event, it defaults to true so that the image map draws the focus frame on the active area. It can be set to false to cancel this behavior.
For the image area DrawImage event, it defaults to false and assumes that the owner draw event will draw some sort of focus indicator for the image area. If this is not the case, you can set it to true to have the image map draw the default focus frame around the active image area.
public ImageMapEventsForm()
{
InitializeComponent();
// Hook up the event handlers. Since they are not accessible in the
// designer, we must do it manually.
ImageAreaBase a = (ImageAreaBase)imMap.Areas[4];
a.DrawImage += Button_DrawImage;
a = (ImageAreaBase)imMap.Areas[5];
a.DrawImage += Button_DrawImage;
a = (ImageAreaBase)imMap.Areas[6];
a.DrawImage += Button_DrawImage;
.
.
.
}
/// <summary>
/// Draw the "button" image areas
/// </summary>
/// <param name="sender">The sender of the event (the image area)</param>
/// <param name="e">The event arguments</param>
private void Button_DrawImage(object sender, DrawImageEventArgs e)
{
ImageAttributes ia;
Graphics g = e.Graphics;
// All are ellipse image areas
ImageAreaEllipse a = (ImageAreaEllipse)sender;
Rectangle r = a.Ellipse;
// Offset the area rectangle by the draw event offset
r.Offset(e.ImageOffset.X, e.ImageOffset.Y);
if(!a.Enabled)
ia = iaDisabled;
else
ia = iaNormal;
using(TextureBrush tb = new TextureBrush(imgFiller,
new Rectangle(0, 0, imgFiller.Width, imgFiller.Height), ia))
{
tb.WrapMode = WrapMode.Tile;
// Translate the brush coordinates to account for the offset
using(Matrix m = new Matrix())
{
m.Translate(r.X, r.Y);
tb.Transform = m;
// If the area is focused or hot lighted, give it a glow effect
if(e.DrawState == DrawState.Focus || e.DrawState == DrawState.HotLight)
{
using(GraphicsPath pth = new GraphicsPath())
{
pth.AddEllipse(r);
using(PathGradientBrush pgb = new PathGradientBrush(pth))
{
pgb.CenterColor = Color.LightSteelBlue;
if(e.DrawState == DrawState.Focus)
pgb.SurroundColors = new Color[] { Color.Yellow };
else
pgb.SurroundColors = new Color[] { Color.Blue };
pgb.FocusScales = new PointF(0.8f, 0.8f);
g.FillEllipse(pgb, r);
}
}
}
// Draw the filler
g.FillEllipse(tb, r);
g.DrawString((string)a.Tag, buttonFont, Brushes.Black, r, sfFormat);
}
}
}Public Sub New()
MyBase.New()
InitializeComponent()
' Hook up the event handlers. Since they are not accessible in the
' designer, we must do it manually.
Dim a As ImageAreaBase = DirectCast(imMap.Areas(4), ImageAreaBase)
AddHandler a.DrawImage, AddressOf Button_DrawImage
a = DirectCast(imMap.Areas(5), ImageAreaBase)
AddHandler a.DrawImage, AddressOf Button_DrawImage
a = DirectCast(imMap.Areas(6), ImageAreaBase)
AddHandler a.DrawImage, AddressOf Button_DrawImage
.
.
.
End Sub
''' <summary>
''' Draw the "button" image areas
''' </summary>
''' <param name="sender">The sender of the event (the image area)</param>
''' <param name="e">The event arguments</param>
Private Sub Button_DrawImage(sender As Object, e As DrawImageEventArgs)
Dim ia As ImageAttributes
Dim g As Graphics = e.Graphics
' All are ellipse image areas
Dim a As ImageAreaEllipse = DirectCast(sender, ImageAreaEllipse)
Dim r As Rectangle = a.Ellipse
' Offset the area rectangle by the draw event offset
r.Offset(e.ImageOffset.X, e.ImageOffset.Y)
If Not a.Enabled Then
ia = iaDisabled
Else
ia = iaNormal
End If
Using tb As New TextureBrush(imgFiller, _
New Rectangle(0, 0, imgFiller.Width, imgFiller.Height), ia)
tb.WrapMode = WrapMode.Tile
' Translate the brush coordinates to account for the offset
Using m As New Matrix()
m.Translate(CType(r.X, Single), CType(r.Y, Single))
tb.Transform = m
' If the area is focused or hot lighted, give it a glow effect
If e.DrawState = DrawState.Focus Or e.DrawState = DrawState.HotLight Then
Using pth As New GraphicsPath()
pth.AddEllipse(r)
Using pgb As New PathGradientBrush(pth)
pgb.CenterColor = Color.LightSteelBlue
If e.DrawState = DrawState.Focus Then
pgb.SurroundColors = New Color() { Color.Yellow }
Else
pgb.SurroundColors = New Color() { Color.Blue }
End If
pgb.FocusScales = New PointF(0.8!, 0.8!)
g.FillEllipse(pgb, r)
End Using
End Using
End If
' Draw the filler
g.FillEllipse(tb, r)
g.DrawString(DirectCast(a.Tag, String), buttonFont, Brushes.Black, _
New RectangleF(CType(r.X, Single), CType(r.Y, Single), _
CType(r.Width, Single), CType(r.Height, Single)), sfFormat)
End Using
End Using
End SubNo code example is currently available or this language may not be supported.No code example is currently available or this language may not be supported.