Leadtools.WinForms Namespace > RasterImageViewer Class : SetInteractiveModeCursor Method |
public void SetInteractiveModeCursor( RasterViewerInteractiveMode interactiveMode, Cursor idleCursor, Cursor workingCursor )
'Declaration Public Sub SetInteractiveModeCursor( _ ByVal interactiveMode As RasterViewerInteractiveMode, _ ByVal idleCursor As Cursor, _ ByVal workingCursor As Cursor _ )
'Usage Dim instance As RasterImageViewer Dim interactiveMode As RasterViewerInteractiveMode Dim idleCursor As Cursor Dim workingCursor As Cursor instance.SetInteractiveModeCursor(interactiveMode, idleCursor, workingCursor)
public void SetInteractiveModeCursor( RasterViewerInteractiveMode interactiveMode, Cursor idleCursor, Cursor workingCursor )
function Leadtools.WinForms.RasterImageViewer.SetInteractiveModeCursor( interactiveMode , idleCursor , workingCursor )
public: void SetInteractiveModeCursor( RasterViewerInteractiveMode interactiveMode, Cursor^ idleCursor, Cursor^ workingCursor )
Use this method to set different mouse cursors for each interactive mode used in this RasterImageViewer. A value of null (Nothing in Visual Basic) for any of the cursors instructs the viewer to use the default cursor set in the Cursor property either by the designer or through code.
By default, all the interactive modes have a cursor value of null (Nothing in Visual Basic) and changing the interactive mode will not change the mouse cursor unless you call this method first to set the desired cursors to use.
The idle cursor is used when the interactive mode is not working, in other words, when the user has set the interactive mode to a value but has not clicked the mouse button to initiate it yet. The working cursor is used when the interactive mode is working, in other words, when the user has clicked and start dragging the mouse button.
Note that when you call this method, the current interactive mode will be canceled if it is working.
<StructLayout(LayoutKind.Sequential, Pack:=1)> _ Private Class ICONINFO Public fIcon As Boolean Public xHotspot As Integer Public yHotspot As Integer Public hbmMask As IntPtr Public hbmColor As IntPtr End Class <DllImport("user32.dll")> _ Private Shared Function CreateIconIndirect(ByVal piconinfo As ICONINFO) As IntPtr End Function <DllImport("user32.dll")> _ Private Shared Function GetIconInfo(ByVal hIcon As IntPtr, <Out()> ByRef piconinfo As ICONINFO) As Boolean End Function <DllImport("user32.dll")> _ Private Shared Function DestroyIcon(ByVal handle As IntPtr) As Boolean End Function Private Sub SetInteractiveModeCursorExample(ByVal viewer As RasterImageViewer) Dim idleCursor As Cursor = Cursors.Cross Dim workingCursor As Cursor = Nothing ' Create an empty cursor to use when the magnifying glass is on ' Use the same size as the Cross cursor Using btmp As New Bitmap(idleCursor.Size.Width, idleCursor.Size.Height) Using g As Graphics = Graphics.FromImage(btmp) g.Clear(Color.Transparent) End Using Dim iconInfo As New ICONINFO() Dim hIcon As IntPtr = btmp.GetHicon() GetIconInfo(hIcon, iconInfo) iconInfo.xHotspot = btmp.Width \ 2 iconInfo.yHotspot = btmp.Height \ 2 iconInfo.fIcon = False Dim hCursor As IntPtr = CreateIconIndirect(iconInfo) workingCursor = New Cursor(hCursor) DestroyIcon(hIcon) End Using viewer.SetInteractiveModeCursor(RasterViewerInteractiveMode.MagnifyGlass, idleCursor, workingCursor) ' Not set the interactive mode to magnify glass viewer.InteractiveMode = RasterViewerInteractiveMode.MagnifyGlass End Sub
[StructLayout(LayoutKind.Sequential, Pack = 1)] private class ICONINFO { public bool fIcon; public int xHotspot; public int yHotspot; public IntPtr hbmMask; public IntPtr hbmColor; } [DllImport("user32.dll")] private static extern IntPtr CreateIconIndirect([Out] ICONINFO piconinfo); [DllImport("user32.dll")] private static extern bool GetIconInfo(IntPtr hIcon, [In, Out] ICONINFO piconinfo); [DllImport("user32.dll")] private extern static bool DestroyIcon(IntPtr handle); private void SetInteractiveModeCursorExample(RasterImageViewer viewer) { Cursor idleCursor = Cursors.Cross; Cursor workingCursor = null; // Create an empty cursor to use when the magnifying glass is on // Use the same size as the Cross cursor using(Bitmap btmp = new Bitmap(idleCursor.Size.Width, idleCursor.Size.Height)) { using(Graphics g = Graphics.FromImage(btmp)) { g.Clear(Color.Transparent); } ICONINFO iconInfo = new ICONINFO(); IntPtr hIcon = btmp.GetHicon(); GetIconInfo(hIcon, iconInfo); iconInfo.xHotspot = btmp.Width / 2; iconInfo.yHotspot = btmp.Height / 2; iconInfo.fIcon = false; IntPtr hCursor = CreateIconIndirect(iconInfo); workingCursor = new Cursor(hCursor); DestroyIcon(hIcon); } viewer.SetInteractiveModeCursor(RasterViewerInteractiveMode.MagnifyGlass, idleCursor, workingCursor); // Not set the interactive mode to magnify glass viewer.InteractiveMode = RasterViewerInteractiveMode.MagnifyGlass; }
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2