Leadtools.WinForms Namespace > RasterImageList Class : SelectUserImage Property |
[BrowsableAttribute(false)] public RasterImage SelectUserImage {get; set;}
'Declaration <BrowsableAttribute(False)> Public Property SelectUserImage As RasterImage
'Usage Dim instance As RasterImageList Dim value As RasterImage instance.SelectUserImage = value value = instance.SelectUserImage
[BrowsableAttribute(false)] public: property RasterImage^ SelectUserImage { RasterImage^ get(); void set ( RasterImage^ value); }
The user defined image selection marker is used only when ViewStyle is set to RasterImageListViewStyle.Normal. It is ignored in all other styles.
When you set an image into the SelectUserImage, the specified image will be displayed around each selected item.
Normally, you would want to set a transparent color into this image using the RasterImage.Transparent and RasterImage.TransparentColor properties of the Leadtools.RasterImage class.
Imports Leadtools.WinForms Imports Leadtools Imports Leadtools.Codecs Imports Leadtools.Drawing ''' This example will use a user-defined image as the selection marker for a <see cref="RasterImageList"/> control. Public Sub RasterImageList_SelectUserImage(ByVal imageList As RasterImageList) imageList.ViewStyle = RasterImageListViewStyle.Normal ' Create the user-defined image to use as the selection marker (an ellipse) Dim palette As RasterColor() = New RasterColor() {} Dim selectImage As RasterImage = New RasterImage(RasterMemoryFlags.Conventional, imageList.ItemSize.Width, imageList.ItemSize.Height, 24, _ RasterByteOrder.Bgr, RasterViewPerspective.TopLeft, palette, IntPtr.Zero, 0) ' Draw the ellipse Dim hdc As IntPtr = RasterImagePainter.CreateLeadDC(selectImage) Dim g As Graphics = Graphics.FromHdc(hdc) Dim rc As Rectangle = New Rectangle(0, 0, selectImage.ImageWidth, selectImage.ImageHeight) g.FillRectangle(Brushes.Black, rc) For i As Integer = 0 To 3 g.DrawEllipse(Pens.Red, rc.Left, rc.Top, rc.Width - 1, rc.Height - 1) rc.Inflate(-1, -1) Next i g.Dispose() RasterImagePainter.DeleteLeadDC(hdc) ' Set the transparent color selectImage.Transparent = True selectImage.TransparentColor = RasterColor.FromKnownColor(RasterKnownColor.Black) ' Set this image as the selection marker imageList.SelectUserImage = selectImage End Sub
using Leadtools.WinForms; using Leadtools; using Leadtools.Codecs; using Leadtools.Drawing; /// This example will use a user-defined image as the selection marker of an <see cref="RasterImageList"/> control. public void RasterImageList_SelectUserImage(RasterImageList imageList) { // Use "Normal" view style imageList.ViewStyle = RasterImageListViewStyle.Normal; // Create the user-defined image to use as the selection marker (an ellipse) RasterColor[] palette = new RasterColor[0]; RasterImage selectImage = new RasterImage( RasterMemoryFlags.Conventional, imageList.ItemSize.Width, imageList.ItemSize.Height, 24, RasterByteOrder.Bgr, RasterViewPerspective.TopLeft, palette, IntPtr.Zero, 0); // Draw the ellipse IntPtr hdc = RasterImagePainter.CreateLeadDC(selectImage); Graphics g = Graphics.FromHdc(hdc); Rectangle rc = new Rectangle(0, 0, selectImage.ImageWidth, selectImage.ImageHeight); g.FillRectangle(Brushes.Black, rc); for(int i = 0; i < 4; i++) { g.DrawEllipse(Pens.Red, rc.Left, rc.Top, rc.Width - 1, rc.Height - 1); rc.Inflate(-1, -1); } g.Dispose(); RasterImagePainter.DeleteLeadDC(hdc); // Set the transparent color selectImage.Transparent = true; selectImage.TransparentColor = RasterColor.FromKnownColor(RasterKnownColor.Black); // Set this image as the selection marker imageList.SelectUserImage = selectImage; }