RichEditControl.GetBoundsFromPosition(DocumentPosition) Method

Gets bounds of the character at the specified position.

Namespace: DevExpress.XtraRichEdit

Assembly: DevExpress.XtraRichEdit.v22.2.dll

NuGet Package: DevExpress.Win.RichEdit

Declaration

C#

public Rectangle GetBoundsFromPosition(
    DocumentPosition pos
)

VB.NET

Public Function GetBoundsFromPosition(
    pos As DocumentPosition
) As Rectangle

Parameters

Name	Type	Description
pos	DocumentPosition	A target position.

Returns

Type	Description
Rectangle	the area occupied by a character, or the System.Drawing.Rectangle.Empty value if the bounds could not be determined.

Remarks

You can use the GetBoundsFromPosition method only for the currently visible document part. If the specified position is not displayed, the method returns a System.Drawing.Rectangle.Empty value.

The rectangle’s location and size are expressed in currently specified measurement units. Use the Document.Unit property to change the measurement units.

Example

The following code highlights the line containing the caret. The Document.CaretPosition property determines the caret position, the RichEditControl.GetBoundsFromPosition method calculates the caret screen coordinates.

The RichEditControl instance is passed to the BarItem.ItemClick event handler using the BarItem.Tag property.

View Example

RichEditControlActions.cs

static void richEditControl_Paint(object sender, System.Windows.Forms.PaintEventArgs e) {
    RichEditControl richEdit = sender as RichEditControl;
    DocumentPosition pos = richEdit.Document.CaretPosition;
    if(pos != null) {
        System.Drawing.Rectangle rect = DevExpress.Office.Utils.Units.DocumentsToPixels(
            richEdit.GetBoundsFromPosition(pos), 
            richEdit.DpiX, 
            richEdit.DpiY);

        Section firstSection = richEdit.Document.Sections[0];
        int pageWidth = Convert.ToInt32(firstSection.Page.Width - firstSection.Margins.Left - firstSection.Margins.Right);
        e.Graphics.DrawLine(System.Drawing.Pens.Red, 
            new System.Drawing.Point(0, rect.Bottom), 
            new System.Drawing.Point(pageWidth, rect.Bottom));
    }
}

RichEditControlActions.vb

Private Shared Sub richEditControl_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs)
    Dim richEdit As RichEditControl = TryCast(sender, RichEditControl)
    Dim pos As DocumentPosition = richEdit.Document.CaretPosition
    If pos IsNot Nothing Then
        Dim rect As System.Drawing.Rectangle = DevExpress.Office.Utils.Units.DocumentsToPixels(
            richEdit.GetBoundsFromPosition(pos),
            richEdit.DpiX,
            richEdit.DpiY)

        Dim firstSection As Section = richEdit.Document.Sections(0)
        Dim pageWidth As Integer = Convert.ToInt32(firstSection.Page.Width - firstSection.Margins.Left - firstSection.Margins.Right)
        e.Graphics.DrawLine(System.Drawing.Pens.Red,
                            New System.Drawing.Point(0, rect.Bottom),
                            New System.Drawing.Point(pageWidth, rect.Bottom))
    End If
End Sub