Cursor.Inverted Property

Artikel
10/19/2012

Gets a value that indicates whether the cursor is the inverted end of the pen.

Namespace: Microsoft.Ink
Assembly: Microsoft.Ink (in Microsoft.Ink.dll)

Syntax

'Declaration
Public ReadOnly Property Inverted As Boolean
'Usage
Dim instance As Cursor 
Dim value As Boolean 

value = instance.Inverted

public bool Inverted { get; }

public:
property bool Inverted {
    bool get ();
}

public function get Inverted () : boolean

Property Value

Type: System.Boolean
true if the cursor is the inverted end of the pen; false if the cursor is not the inverted end of the pen, or the pen does not support a cursor associated with the inverted end of the pen.

Remarks

Inverted cursors are generally associated with erasing, so a known pen might have one end that is intended to draw ink and another end that is intended to erase strokes. However, behavior for when the system recognizes the inverted end of the pen is not limited to erasing. You may associate any acceptable cursor behavior with the Inverted property.

For more information about erasing ink, see Erasing Ink with the Pen.

Note

Whether or not you use the Inverted property is entirely up to the needs of your application. Applications are not required to inspect inverted cursors, and the ink collector applies default drawing attributes to inverted cursors just as it does to cursors that are not inverted.

Note

This function can be re-entered if called within certain message handlers, causing unexpected results. Take care to avoid a reentrant call when handling any of the following messages: WM_ACTIVATE, WM_ACTIVATEAPP, WM_NCACTIVATE, WM_PAINT; WM_SYSCOMMAND if wParam is set to SC_HOTKEY or SC_TASKLIST; and WM_SYSKEYDOWN (when processing Alt-Tab or Alt-Esc key combinations). This is an issue with single-threaded apartment model applications.

Examples

This C# example returns a report on the attributes of all of the cursors that are encountered by the InkCollector object passed in as a parameter.

using Microsoft.Ink;
//. . .
public string CursorReport(InkCollector theInkCollector)
{
    string theReport = "The InkCollector has encountered the following cursors so far:" + Environment.NewLine;
    // Get the Cursors collection from the InkCollector
    Microsoft.Ink.Cursors theCursors = theInkCollector.Cursors;
    // Prevent changes to the collection while we iterate over it.
    lock( theCursors.SyncRoot )
    {
        theReport += "Count of cursors: " + theCursors.Count + Environment.NewLine + Environment.NewLine ;
        foreach (Microsoft.Ink.Cursor cursor in theCursors)
        {
            theReport += "Cursor Name: " + cursor.Name + Environment.NewLine ;
            theReport += "Cursor ToString: " + cursor.ToString() + Environment.NewLine ;
            theReport += "Tablet Name: " + cursor.Tablet.Name  + Environment.NewLine ;
            theReport += "Cursor Id: " + cursor.Id.ToString()  + Environment.NewLine ;
            theReport += "Cursor is inverted: " + cursor.Inverted.ToString()  + Environment.NewLine ;
            theReport += "Cursor Buttons:" + Environment.NewLine;
            foreach (CursorButton button in cursor.Buttons)
            {
                CursorButtonState theState = button.State;
                theReport += "    Button Name: " + button.Name + Environment.NewLine ;
                theReport += "    State: " + button.State.ToString() + Environment.NewLine ;
                theReport += "    Id: " + button.Id.ToString()  + Environment.NewLine + Environment.NewLine;
            }
        }
    }
    return theReport;
}

This Microsoft® Visual Basic® .NET example returns a report on the attributes of all of the cursors that are encountered by the InkCollector object passed in as a parameter.

Imports Microsoft.Ink
'. . .
Public Function CursorReport(ByVal theInkCollector As InkCollector) _
    As String
    Dim theReport As String = "The InkCollector has encountered " & _
        "the following cursors so far:" & vbCrLf
    ' Get the Cursors collection from the InkCollector
    Dim theCursors As Cursors = theInkCollector.Cursors
    ' Prevent changes to the collection while we iterate over it.
    SyncLock theCursors.SyncRoot
        theReport &= "Count of cursors: " & theCursors.Count & vbCrLf
        Dim theCursor As Cursor
        For Each theCursor In theCursors
            theReport &= "Cursor Name: " & theCursor.Name & vbCrLf
            theReport &= "Cursor ToString: " & theCursor.ToString() & _
                vbCrLf
            theReport &= "Tablet Name: " & theCursor.Tablet.Name & vbCrLf
            theReport &= "Cursor Id: " & theCursor.Id.ToString() & vbCrLf
            theReport &= "Cursor is inverted: " & _
                theCursor.Inverted.ToString() & vbCrLf
            theReport &= "Cursor Buttons:" & vbCrLf
            Dim theButton As CursorButton
            For Each theButton In theCursor.Buttons
                Dim theState As CursorButtonState = theButton.State
                theReport &= "    Button Name: " & theButton.Name & vbCrLf
                theReport &= "    State: " & _
                    theButton.State.ToString() & vbCrLf
                theReport &= "    Id: " & theButton.Id.ToString() & _
                    vbCrLf & vbCrLf
            Next
        Next
    End SyncLock
    Return theReport
End Function

Platforms

Windows 7, Windows Vista, Windows Server 2008 R2, Windows Server 2008

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Version Information

.NET Framework

Supported in: 3.0

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