GdPicture.NET Reference Guide
SetRectCoordinatesOnDocumentPixel Method
Example 





GdPicture14.WPF Namespace > GdViewer Class : SetRectCoordinatesOnDocumentPixel Method
The horizontal (X) coordinate (0-based) of the top left point, in pixels, of the rectangle of selection, related to the current page.
The vertical (Y) coordinate (0-based) of the top left point, in pixels, of the rectangle of selection, related to the current page.
The width, in pixels, of the rectangle of selection.
The height, in pixels, of the rectangle of selection.
Determines the rectangle of area selection refering to the document pages area. This method sets the specified coordinates and dimensions, in pixels, to identify the rectangle of selection related to the the document displayed in the GdViewer control. The specified rectangle is immediately drawn on the displayed page using the predefined parameters. Please ensure, that all given values correspond to the actual document pages area.

Be aware that the rectangle of selection always relates to the displayed document. On the other hand, you can specify the border size of this rectangle using the RectBorderSize property and the border color of this rectangle using the RectBorderColor property to be applied permanently.

Syntax
'Declaration
 
Public Sub SetRectCoordinatesOnDocumentPixel( _
   ByVal Left As Double, _
   ByVal Top As Double, _
   ByVal Width As Double, _
   ByVal Height As Double _
) 
public void SetRectCoordinatesOnDocumentPixel( 
   double Left,
   double Top,
   double Width,
   double Height
)
public procedure SetRectCoordinatesOnDocumentPixel( 
    Left: Double;
    Top: Double;
    Width: Double;
    Height: Double
); 
public function SetRectCoordinatesOnDocumentPixel( 
   Left : double,
   Top : double,
   Width : double,
   Height : double
);
public: void SetRectCoordinatesOnDocumentPixel( 
   double Left,
   double Top,
   double Width,
   double Height
) 
public:
void SetRectCoordinatesOnDocumentPixel( 
   double Left,
   double Top,
   double Width,
   double Height
) 

Parameters

Left
The horizontal (X) coordinate (0-based) of the top left point, in pixels, of the rectangle of selection, related to the current page.
Top
The vertical (Y) coordinate (0-based) of the top left point, in pixels, of the rectangle of selection, related to the current page.
Width
The width, in pixels, of the rectangle of selection.
Height
The height, in pixels, of the rectangle of selection.
Remarks
Be aware that you are allowed to define only one rectangle of selection within the current viewer. Likewise, the rectangle of selection always relates to the currently displayed document, meaning that without displaying some document you cannot specify the new rectangle of selection.

Just to remind you, that all coordinates are 0-based with the origin being in the top left corner in the document pages area and they are related to the current page determined by the CurrentPage property.

Example
How to enlarge the specified rectangle of selection on the displayed document.
'We assume that the GdViewer1 control has been properly integrated
'and your document has been properly displayed as well.
 
'Setting some custom properties for the rectangle of selection.
GdViewer1.RectBorderColor = Color.FromArgb(255, 255, 69, 0)
GdViewer1.RectBorderSize = 2
 
If GdViewer1.SelectAllText() = GdPictureStatus.OK Then
    Dim regions As Rect() = GdViewer1.GetSelectedTextRegions()
 
    If (GdViewer1.GetStat() = GdPictureStatus.OK) AndAlso (regions.Length > 0) Then
        'The first region surely exists.
        Dim rect As Rect = regions(0)
        Dim left As Double = 0, top As Double = 0, width As Double = 0, height As Double = 0
        GdViewer1.SetRectCoordinatesOnDocumentInch(rect.Left, rect.Top, rect.Width, rect.Height)
        GdViewer1.GetRectCoordinatesOnDocumentPixel(left, top, width, height)
        GdViewer1.SetRectCoordinatesOnDocumentPixel(left - 2, top - 2, width + 4, height + 4)
        GdViewer1.CenterOnRect()
    Else
        MessageBox.Show("The text region can't be found. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.SetRectCoordinatesOnDocumentPixel")
    End If
Else
    MessageBox.Show("The text can't be selected. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.SetRectCoordinatesOnDocumentPixel")
End If
//We assume that the GdViewer1 control has been properly integrated
//and your document has been properly displayed as well.
 
//Setting some custom properties for the rectangle of selection.
GdViewer1.RectBorderColor = Color.FromArgb(255, 255, 69, 0);
GdViewer1.RectBorderSize = 2;
 
if (GdViewer1.SelectAllText() == GdPictureStatus.OK)
{
    Rect[] regions = GdViewer1.GetSelectedTextRegions();
    if ((GdViewer1.GetStat() == GdPictureStatus.OK) && (regions.Length > 0))
    {
        //The first region surely exists.
        Rect rect = regions[0];
        double left = 0, top = 0, width = 0, height = 0;
        GdViewer1.SetRectCoordinatesOnDocumentInch(rect.Left, rect.Top, rect.Width, rect.Height);
        GdViewer1.GetRectCoordinatesOnDocumentPixel(ref left, ref top, ref width, ref height);
        GdViewer1.SetRectCoordinatesOnDocumentPixel(left - 2, top - 2, width + 4, height + 4);
        GdViewer1.CenterOnRect();
    }
    else
        MessageBox.Show("The text region can't be found. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.SetRectCoordinatesOnDocumentPixel");
}
else
    MessageBox.Show("The text can't be selected. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.SetRectCoordinatesOnDocumentPixel");
See Also

Reference

GdViewer Class
GdViewer Members
SetRectCoordinatesOnDocumentPixel Method
GetRectCoordinatesOnDocumentInch Method
SetRectCoordinatesOnViewerPixel Method
IsRect Method
ClearRect Method
CenterOnRect Method
RectBorderSize Property