GetRegionColor Method (GdViewer)

In This Topic

Gets the fill color of a highlighted region 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 the fill color of each highlighted region when adding regions using the AddRegion(String,Double,Double,Double,Double,Color,RegionFillMode) method or directly using the SetRegionColor method.

Syntax

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

'Declaration
 
Public Function GetRegionColor( _
   ByVal RegionID As Integer _
) As Color

public Color GetRegionColor( 
   int RegionID
)

public function GetRegionColor( 
    RegionID: Integer
): Color;

public function GetRegionColor( 
   RegionID : int
) : Color;

public: Color GetRegionColor( 
   int RegionID
)

public:
Color GetRegionColor( 
   int RegionID
)

Parameters

RegionID: A unique region identifier of the specified region. You can obtain this identifier using the GetRegionID method or when creating regions using the AddRegion(String,Double,Double,Double,Double,Color,RegionFillMode) method.

Return Value

The fill color of the specified region. The GetStat method can be subsequently used to determine if this method has been successful.

Remarks

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

Just to inform you, that the default fill color set by the toolkit is yellow, ARGB(255, 255, 0).

Example

How to change the fill color of highlighted regions.

VB.NET
C#

'We assume that the GdViewer1 control has been properly integrated and your document has been properly displayed as well.
            
'To successfully follow this example, please use the code snippet attached to the AddRegion method to define highlighted regions
'or define some highlighted regions using SearchText methods by yourself.
Dim regID As Integer = 0, regCount As Integer = GdViewer1.RegionCount()
If regCount > 0 Then
    Dim firstRegColor As Color = GdViewer1.GetRegionColor(GdViewer1.GetRegionID(0))
    Dim currColor As Color, newColor As Color = Color.FromArgb(255, 65, 190, 190)
    For j As Integer = 0 To regCount-1
        regID = GdViewer1.GetRegionID(j)
        currColor = GdViewer1.GetRegionColor(regID)
        If currColor = firstRegColor Then GdViewer1.SetRegionColor(regID, newColor)
    Next
    'Redrawing regions with the newly defined color.
    GdViewer1.Redraw()
Else
    MessageBox.Show("No highlighted region found related to this document. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.GetRegionColor")
End If

//We assume that the GdViewer1 control has been properly integrated and your document has been properly displayed as well.
            
//To successfully follow this example, please use the code snippet attached to the AddRegion method to define highlighted regions
//or define some highlighted regions using SearchText methods by yourself.
int regID = 0, regCount = GdViewer1.RegionCount();
if (regCount > 0)
{
    Color firstRegColor = GdViewer1.GetRegionColor(GdViewer1.GetRegionID(0));
    Color currColor, newColor = Color.FromArgb(255, 65, 190, 190);
    for (int j = 0; j < regCount; j++)
    {
        regID = GdViewer1.GetRegionID(j);
        currColor = GdViewer1.GetRegionColor(regID);
        if (currColor == firstRegColor)
            GdViewer1.SetRegionColor(regID, newColor);
    }
    //Redrawing regions with the newly defined color.
    GdViewer1.Redraw();
}
else
    MessageBox.Show("No highlighted region found related to this document. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.GetRegionColor");

Reference

GdViewer Class
GdViewer Members
SetRegionColor Method
RegionCount Method
GetRegionID Method
SearchText(String,Int32,Boolean) Method
SearchText(String,Int32,Boolean,Boolean) Method
AddRegion(String,Double,Double,Double,Double,Color,RegionFillMode) Method
GetRegionBorderColor Method
SetRegionBorderColor Method