SetRegionTopPixels Method (GdViewer)

In This Topic

Sets the vertical (Y) coordinate of the top left point, in pixels, where the highlighted region's rectangle is to be located on the displayed document. The highlighted region is specified by its unique identifier related to the document currently displayed in the GdViewer control. These regions, if present, determines the currently defined highlighted regions on the displayed document.

You can define this coordinate of the region's rectangle when adding regions using AddRegion(String,Int32,Int32,Int32,Int32,ForegroundMixMode,Int32) or AddRegionInches(String,Single,Single,Single,Single,ForegroundMixMode,Int32) methods. You can determine this coordinate of the region's rectangle using the GetRegionTopPixels method.

Syntax

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

'Declaration

 

Public Function SetRegionTopPixels( _

   ByVal RegionID As Integer, _

   ByVal Top As Integer _

) As GdPictureStatus

public GdPictureStatus SetRegionTopPixels( 

   int RegionID,

   int Top

)

public function SetRegionTopPixels( 

    RegionID: Integer;

    Top: Integer

): GdPictureStatus;

public function SetRegionTopPixels( 

   RegionID : int,

   Top : int

) : GdPictureStatus;

public: GdPictureStatus SetRegionTopPixels( 

   int RegionID,

   int Top

)

public:

GdPictureStatus SetRegionTopPixels( 

   int RegionID,

   int Top

)

Parameters

RegionID: A unique region identifier of the specified region. You can obtain this identifier using the GetRegionID method or when creating regions using AddRegion(String,Int32,Int32,Int32,Int32,ForegroundMixMode,Int32) or AddRegionInches(String,Single,Single,Single,Single,ForegroundMixMode,Int32) methods.
Top: The new value for the vertical coordinate of the top left point, in pixels, of the highlighted region's rectangle, related to the actual document.

Return Value

A member of the GdPictureStatus enumeration. If the method has been successfully followed, then the return value is GdPictureStatus.OK. We strongly recommend always checking this status first.

Remarks

Be aware that if the required region does not exist, the method will fail.

Please note that the specified value corresponds to the actual document area, it is not related to the GdViewer control area.

Example

How to enlarge all defined highlighted regions by setting their new positions and new sizes.

VB.NET
C#

'We assume that the GdViewer1 control has been properly integrated.

If GdViewer1.DisplayFromFile("") = GdPictureStatus.OK Then

    Dim text_to_find As String = "GdPicture"

    GdViewer1.RemoveAllRegions()

    Dim text_found As Boolean = GdViewer1.SearchText(text_to_find, 0, True)

    If GdViewer1.GetStat() = GdPictureStatus.OK Then

        Dim regCount As Integer = GdViewer1.RegionCount(), regID As Integer = 0

        If text_found AndAlso (regCount > 0) Then

            For j As Integer = 1 To regCount

                regID = GdViewer1.GetRegionID(j)

                GdViewer1.SetRegionLeftPixels(regID, GdViewer1.GetRegionLeftPixels(regID) - 10)

                GdViewer1.SetRegionTopPixels(regID, GdViewer1.GetRegionTopPixels(regID) - 10)

                GdViewer1.SetRegionWidthPixels(regID, GdViewer1.GetRegionWidthPixels(regID) + 20)

                GdViewer1.SetRegionHeightPixels(regID, GdViewer1.GetRegionHeightPixels(regID) + 20)

            Next

            GdViewer1.Redraw()

        Else

            MessageBox.Show("The given text has not been found.", "GdViewer.SetRegionTopPixels")

        End If

    Else

        MessageBox.Show("The search process has failed. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.SetRegionTopPixels")

    End If

Else

    MessageBox.Show("The file can't be displayed. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.SetRegionTopPixels")

End If

//We assume that the GdViewer1 control has been properly integrated.

if (GdViewer1.DisplayFromFile("") == GdPictureStatus.OK)

{

    string text_to_find = "GdPicture";

    GdViewer1.RemoveAllRegions();

    bool text_found = GdViewer1.SearchText(text_to_find, 0, true);

    if (GdViewer1.GetStat() == GdPictureStatus.OK)

    {

        int regCount = GdViewer1.RegionCount(), regID = 0;

        if (text_found && (regCount > 0))

        {

            for (int j = 1; j <= regCount; j++)

            {

                regID = GdViewer1.GetRegionID(j);

                GdViewer1.SetRegionLeftPixels(regID, GdViewer1.GetRegionLeftPixels(regID) - 10);

                GdViewer1.SetRegionTopPixels(regID, GdViewer1.GetRegionTopPixels(regID) - 10);

                GdViewer1.SetRegionWidthPixels(regID, GdViewer1.GetRegionWidthPixels(regID) + 20);

                GdViewer1.SetRegionHeightPixels(regID, GdViewer1.GetRegionHeightPixels(regID) + 20);

            }

            GdViewer1.Redraw();

        }

        else

            MessageBox.Show("The given text has not been found.", "GdViewer.SetRegionTopPixels");

    }

    else

        MessageBox.Show("The search process has failed. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.SetRegionTopPixels");

}

else

    MessageBox.Show("The file can't be displayed. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.SetRegionTopPixels");

Example

How to enlarge all defined highlighted regions by setting their new positions and new sizes. 'We assume that the GdViewer1 control has been properly integrated. If GdViewer1.DisplayFromFile("") = GdPictureStatus.OK Then Dim text_to_find As String = "GdPicture" GdViewer1.RemoveAllRegions() Dim text_found As Boolean = GdViewer1.SearchText(text_to_find, 0, True) If GdViewer1.GetStat() = GdPictureStatus.OK Then Dim regCount As Integer = GdViewer1.RegionCount(), regID As Integer = 0 If text_found AndAlso (regCount > 0) Then For j As Integer = 1 To regCount regID = GdViewer1.GetRegionID(j) GdViewer1.SetRegionLeftPixels(regID, GdViewer1.GetRegionLeftPixels(regID) - 10) GdViewer1.SetRegionTopPixels(regID, GdViewer1.GetRegionTopPixels(regID) - 10) GdViewer1.SetRegionWidthPixels(regID, GdViewer1.GetRegionWidthPixels(regID) + 20) GdViewer1.SetRegionHeightPixels(regID, GdViewer1.GetRegionHeightPixels(regID) + 20) Next GdViewer1.Redraw() Else MessageBox.Show("The given text has not been found.", "GdViewer.SetRegionTopPixels") End If Else MessageBox.Show("The search process has failed. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.SetRegionTopPixels") End If Else MessageBox.Show("The file can't be displayed. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.SetRegionTopPixels") End If //We assume that the GdViewer1 control has been properly integrated. if (GdViewer1.DisplayFromFile("") == GdPictureStatus.OK) { string text_to_find = "GdPicture"; GdViewer1.RemoveAllRegions(); bool text_found = GdViewer1.SearchText(text_to_find, 0, true); if (GdViewer1.GetStat() == GdPictureStatus.OK) { int regCount = GdViewer1.RegionCount(), regID = 0; if (text_found && (regCount > 0)) { for (int j = 1; j <= regCount; j++) { regID = GdViewer1.GetRegionID(j); GdViewer1.SetRegionLeftPixels(regID, GdViewer1.GetRegionLeftPixels(regID) - 10); GdViewer1.SetRegionTopPixels(regID, GdViewer1.GetRegionTopPixels(regID) - 10); GdViewer1.SetRegionWidthPixels(regID, GdViewer1.GetRegionWidthPixels(regID) + 20); GdViewer1.SetRegionHeightPixels(regID, GdViewer1.GetRegionHeightPixels(regID) + 20); } GdViewer1.Redraw(); } else MessageBox.Show("The given text has not been found.", "GdViewer.SetRegionTopPixels"); } else MessageBox.Show("The search process has failed. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.SetRegionTopPixels"); } else MessageBox.Show("The file can't be displayed. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.SetRegionTopPixels");

Reference

GdViewer Class
GdViewer Members
AddRegion(String,Int32,Int32,Int32,Int32,ForegroundMixMode,Int32) Method
AddRegionInches(String,Single,Single,Single,Single,ForegroundMixMode,Int32) Method
GetRegionTopPixels Method
GetRegionID Method
AddRegion(String,Int32,Int32,Int32,Int32,ForegroundMixMode,Int32) Method
AddRegionInches(String,Single,Single,Single,Single,ForegroundMixMode,Int32) Method
GetRegionTopPixels Method
RegionCount Method
GetRegionID Method
SearchText(String,Int32,Boolean) Method
AddRegion(String,Int32,Int32,Int32,Int32,ForegroundMixMode,Int32) Method
AddRegionInches(String,Single,Single,Single,Single,ForegroundMixMode,Int32) Method
RemoveAllRegions Method
GetRegionTop Method
SetRegionTop Method