TextPane2.IsVisible Method

Article
02/08/2015

Returns a value indicating whether the character or specified characters are visible in the text pane.

Namespace: EnvDTE80
Assembly: EnvDTE80 (in EnvDTE80.dll)

Syntax

'Declaration
Function IsVisible ( _
    Point As TextPoint, _
    PointOrCount As Object _
) As Boolean

bool IsVisible(
    TextPoint Point,
    Object PointOrCount
)

bool IsVisible(
    [InAttribute] TextPoint^ Point, 
    [InAttribute] Object^ PointOrCount
)

abstract IsVisible : 
        Point:TextPoint * 
        PointOrCount:Object -> bool

function IsVisible(
    Point : TextPoint, 
    PointOrCount : Object
) : boolean

Parameters

Point
Type: EnvDTE.TextPoint

Required. A TextPoint location used to determine if a character is visible. Since a Point is situated between two characters, the default interpretation (that is, when no value is given for the PointOrCount argument) is the first character immediately to the right of the text point. If the character after the text point is visible, then the Point is visible as well.

PointOrCount
Type: Object

Optional. Another point that works with the first Point argument to indicate a range of text. IsVisible determines whether or not this range of text is visible. PointOrCount can also be set to a number of characters that follow Point to indicate the range of text.

If a value is not supplied to the PointOrCount argument, IsVisible checks for the visibility of the character immediately to the right of Point, because PointOrCount has a default value of 1.

Return Value

Type: Boolean
true if the point is visible; otherwise, false.

Remarks

If a value is supplied to PointOrCount, then IsVisible returns true when the entire selected range of text is visible.

Examples

This example opens a text document, displays text in it, and then uses the IsVisible method of TextPane2 to determine if the text in the text pane is visible. For more information about how to run this example as an add-in, see How to: Compile and Run the Automation Object Model Code Examples.

Imports EnvDTE
Imports EnvDTE80
Public Sub OnConnection(ByVal application As Object, _
 ByVal connectMode As ext_ConnectMode, ByVal addInInst As Object, _
 ByRef custom As Array) Implements IDTExtensibility2.OnConnection
    _applicationObject = CType(application, DTE2)
    _addInInstance = CType(addInInst, AddIn)
    TextPane2IsVisibleExample(_applicationObject)
End Sub
Sub TextPane2IsVisibleExample(ByVal dte As DTE2)
    Dim objTW As TextWindow
    Dim objPane As TextPane2
    Dim objTextDoc As TextDocument
    Dim objTextPt As TextPoint
    Dim objEP As EditPoint
    ' Create a new text document.
    _applicationObject.ItemOperations.NewFile("General\Text File")
    ' Get a handle to the new document and create EditPoint,
    ' TextPoint, and TextPane objects.
    objTextDoc = CType(_applicationObject.ActiveDocument. _
    Object("TextDocument"), TextDocument)
    objEP = objTextDoc.StartPoint.CreateEditPoint
    objTextPt = objTextDoc.StartPoint
    ' Plug in some text.
    objEP.Insert("A test sentence.")
    objTW = CType(dte.ActiveWindow.Object, TextWindow)
    objPane = CType(objTW.ActivePane, TextPane2)
    ' Check the first ten characters for visibility.
    If objPane.IsVisible(objTextPt, 10) = True Then
        MsgBox("Text is visible")
    Else
        MsgBox("Text is not visible.")
    End If
End Sub

using EnvDTE;
using EnvDTE80;
using System.Windows.Forms;
public void OnConnection(object application, 
ext_ConnectMode connectMode, object addInInst, ref Array custom)
{
    _applicationObject = (DTE2)application;
    _addInInstance = (AddIn)addInInst;
    TextPane2IsVisibleExample(_applicationObject);
}
public void TextPane2IsVisibleExample(DTE2 dte)
{
    TextWindow objTW;
    TextPane2 objPane;
    TextDocument objTextDoc;
    TextPoint objTextPt;
    EditPoint2 objEP;
    // Create a new text document.
    _applicationObject.ItemOperations.NewFile
(@"General\Text File", "test.txt", Constants.vsViewKindTextView);
    // Get a handle to the text document and create EditPoint2,
    // TextPoint, and TextPane2 objects.
    objTextDoc =(TextDocument)_applicationObject.ActiveDocument.Object
("TextDocument");
    objEP = (EditPoint2)objTextDoc.StartPoint.CreateEditPoint();
    objTextPt = objTextDoc.StartPoint;
    // Plug in some text.
    objEP.Insert("A test sentence.");
    objTW = (TextWindow)_applicationObject.ActiveWindow.Object;
    objPane = (TextPane2)objTW.ActivePane;
    // Check the first ten characters for visibility.
    if (objPane.IsVisible(objTextPt, 10))
        MessageBox.Show("Text is visible");
    else
        MessageBox.Show("Text is not visible.");
}

.NET Framework Security

Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.

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