SetRectCoordinatesOnDocument Method (GdViewer)

In This Topic

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

Visual Basic
C#
Delphi
JScript
Managed Extensions for C++
C++/CLI

'Declaration
 
Public Sub SetRectCoordinatesOnDocument( _
   ByVal Left As Integer, _
   ByVal Top As Integer, _
   ByVal Width As Integer, _
   ByVal Height As Integer _
)

public void SetRectCoordinatesOnDocument( 
   int Left,
   int Top,
   int Width,
   int Height
)

public procedure SetRectCoordinatesOnDocument( 
    Left: Integer;
    Top: Integer;
    Width: Integer;
    Height: Integer
);

public function SetRectCoordinatesOnDocument( 
   Left : int,
   Top : int,
   Width : int,
   Height : int
);

public: void SetRectCoordinatesOnDocument( 
   int Left,
   int Top,
   int Width,
   int Height
)

public:
void SetRectCoordinatesOnDocument( 
   int Left,
   int Top,
   int Width,
   int 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 GdViewer control. 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.

VB.NET
C#

'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 = GdViewer1.ARGB(255, 69, 0)
GdViewer1.RectBorderSize = 2
            
If GdViewer1.SelectAllText() = GdPictureStatus.OK Then
    Dim regions As RectangleF() = GdViewer1.GetSelectedTextRegions()
    If (GdViewer1.GetStat() = GdPictureStatus.OK) AndAlso (regions.Count() > 0) Then
        'The first region surely exists.
        Dim rect As RectangleF = regions.ElementAt(0)
        Dim left As Integer = 0, top As Integer = 0, width As Integer = 0, height As Integer = 0
        GdViewer1.SetRectCoordinatesOnDocumentInches(rect.Left, rect.Top, rect.Width, rect.Height)
        GdViewer1.GetRectCoordinatesOnDocument(left, top, width, height)
        GdViewer1.SetRectCoordinatesOnDocument(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.SetRectCoordinatesOnDocument")
    End If
Else
    MessageBox.Show("The text can't be selected. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.SetRectCoordinatesOnDocument")
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 = GdViewer1.ARGB(255, 69, 0);
GdViewer1.RectBorderSize = 2;
            
if (GdViewer1.SelectAllText() == GdPictureStatus.OK)
{
    RectangleF[] regions = GdViewer1.GetSelectedTextRegions();
    if ((GdViewer1.GetStat() == GdPictureStatus.OK) && (regions.Count() > 0))
    {
        //The first region surely exists.
        RectangleF rect = regions.ElementAt(0);
        int left = 0, top = 0, width = 0, height = 0;
        GdViewer1.SetRectCoordinatesOnDocumentInches(rect.Left, rect.Top, rect.Width, rect.Height);
        GdViewer1.GetRectCoordinatesOnDocument(ref left, ref top, ref width, ref height);
        GdViewer1.SetRectCoordinatesOnDocument(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.SetRectCoordinatesOnDocument");
}
else
    MessageBox.Show("The text can't be selected. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.SetRectCoordinatesOnDocument");

Reference

GdViewer Class
GdViewer Members
GetRectCoordinatesOnDocument Method
SetRectCoordinatesOnDocumentInches Method
SetRectCoordinatesOnViewer Method
RectBorderColor Property
RectBorderSize Property
IsRect Method
ClearRect Method