CoordViewerPixelToDocumentInch Method (GdViewer)
Translates the coordinates of the point located in the GdViewer control area (the viewer space), in pixels,
to the coordinates of the corresponding point located in the displayed document (the document space), in inches.
That said, the point with the coordinates (ViewerLeft, ViewerTop) inside the current page displayed in the viewer area matches
to the point with coordinates (DocumentLeft, DocumentTop) inside the page with the same page number in the displayed document.
public void CoordViewerPixelToDocumentInch(
int ,
int ,
ref double ,
ref double
)
public procedure CoordViewerPixelToDocumentInch(
: Integer;
: Integer;
var : Double;
var : Double
);
public function CoordViewerPixelToDocumentInch(
: int,
: int,
: double,
: double
);
public: void CoordViewerPixelToDocumentInch(
int ,
int ,
ref double ,
ref double
)
public:
void CoordViewerPixelToDocumentInch(
int ,
int ,
double% ,
double%
)
'Declaration
Public Sub CoordViewerPixelToDocumentInch( _
ByVal As Integer, _
ByVal As Integer, _
ByRef As Double, _
ByRef As Double _
)
Parameters
- ViewerLeft
- The horizontal (X) coordinate, in pixels, of the point located inside the viewer area.
- ViewerTop
- The vertical (Y) coordinate, in pixels, of the point located inside the viewer area.
- DocumentLeft
- Output parameter. The horizontal (X) coordinate, in inches, of the corresponding point located inside the document area.
- DocumentTop
- Output parameter. The vertical (Y) coordinate, in inches, of the corresponding point located inside the document area.
How to determine the area of the point clicked by the mouse.
'We assume that the GdViewer1 control has been properly integrated.
Sub GdViewer1_MouseClick(ByVal sender As Object, ByVal e As MouseEventArgs)
Dim message As String = "This point is inside the document area."
Dim ViewerLeft As Integer = e.X, ViewerTop As Integer = e.Y
Dim DocumentLeft As Double = 0, DocumentTop As Double = 0
GdViewer1.CoordViewerPixelToDocumentInch(ViewerLeft, ViewerTop, DocumentLeft, DocumentTop)
Dim widthInches As Double = GdViewer1.PageWidth / GdViewer1.HorizontalResolution
Dim heightInches As Double = GdViewer1.PageHeight / GdViewer1.VerticalResolution
If DocumentLeft < 0 OrElse DocumentTop < 0 OrElse DocumentLeft >= widthInches OrElse DocumentTop >= heightInches Then
message = "This point is outside the document area."
End If
MessageBox.Show(message, "GdViewer.CoordViewerPixelToDocumentInch")
End Sub
//We assume that the GdViewer1 control has been properly integrated.
void GdViewer1_MouseClick(object sender, MouseEventArgs e)
{
string message = "This point is inside the document area.";
int ViewerLeft = e.X, ViewerTop = e.Y;
double DocumentLeft = 0, DocumentTop = 0;
GdViewer1.CoordViewerPixelToDocumentInch(ViewerLeft, ViewerTop, ref DocumentLeft, ref DocumentTop);
double widthInches = GdViewer1.PageWidth / GdViewer1.HorizontalResolution;
double heightInches = GdViewer1.PageHeight / GdViewer1.VerticalResolution;
if (DocumentLeft < 0 || DocumentTop < 0 || DocumentLeft >= widthInches || DocumentTop >= heightInches)
{
message = "This point is outside the document area.";
}
MessageBox.Show(message, "GdViewer.CoordViewerPixelToDocumentInch");
}
