GetDisplayedAreaInches Method (GdViewer)
Returns coordinates and dimensions, in inches, of the document's visible area within the control. The resulting rectangle relates to the current page
of the document displayed in the GdViewer control and the coordinates correspond to the actual document pages area of the currently displayed page.
public void GetDisplayedAreaInches(
ref float ,
ref float ,
ref float ,
ref float
)
public procedure GetDisplayedAreaInches(
var : Single;
var : Single;
var : Single;
var : Single
);
public function GetDisplayedAreaInches(
: float,
: float,
: float,
: float
);
public: void GetDisplayedAreaInches(
ref float ,
ref float ,
ref float ,
ref float
)
public:
void GetDisplayedAreaInches(
float% ,
float% ,
float% ,
float%
)
'Declaration
Public Sub GetDisplayedAreaInches( _
ByRef As Single, _
ByRef As Single, _
ByRef As Single, _
ByRef As Single _
)
Parameters
- Left
- Output parameter. The horizontal (X) coordinate (0-based) of the top left point, in inches, of the document's area visible in the control.
- Top
- Output parameter. The vertical (Y) coordinate (0-based) of the top left point, in inches, of the document's area visible in the control.
- Width
- Output parameter. The width, in inches, of the visible area rectangle.
- Height
- Output parameter. The height, in inches, of the visible area rectangle.
How to determine the fully visible rectangle of the current page within the viewer.
'We assume that the GdViewer1 control has been properly integrated
'and your document has been properly displayed as well.
Dim left As Single = 0, top As Single = 0, width As Single = 0, height As Single = 0
GdViewer1.GetDisplayedAreaInches(left, top, width, height)
MessageBox.Show("Page width (X): " + (GdViewer1.PageWidth / 96).ToString() + vbCrLf + "Page height (Y): " + (GdViewer1.PageHeight / 96).ToString() + vbCrLf + vbCrLf +
"Displayed area:" + vbCrLf + " top-left point (X,Y): " + left + ", " + top + vbCrLf + " width: " + width + " height: " + height, "GdViewer.GetDisplayedAreaInches")
//We assume that the GdViewer1 control has been properly integrated
//and your document has been properly displayed as well.
float left = 0, top = 0, width = 0, height = 0;
GdViewer1.GetDisplayedAreaInches(ref left, ref top, ref width, ref height);
MessageBox.Show("Page width (X): " + (GdViewer1.PageWidth / 96).ToString() + "\nPage height (Y): " + (GdViewer1.PageHeight / 96).ToString() + "\n\n" +
"Displayed area:\n top-left point (X,Y): " + left + ", " + top + "\n width: " + width + " height: " + height, "GdViewer.GetDisplayedAreaInches");