InkRenderer.Draw method

Draws ink strokes using the known device context.

Syntax


HRESULT Draw(
  [inlong        hDC,
  [in] IInkStrokes *Strokes
);

Parameters

hDC [in]

Specifies the hWnd of the device context on which to draw.

Strokes [in]

Specifies the strokes to draw.

Return value

This method can return one of these values.

Return codeDescription
S_OK

Success.

E_POINTER

A parameter contained an invalid pointer.

E_INK_MISMATCHED_INK_OBJECT

The strokes parameter is associated with a different InkDisp object.

E_INVALIDARG

An argument is invalid.

E_INK_INCOMPATIBLE_OBJECT

The hdc or the strokes parameter does not point to a valid object.

E_INK_EXCEPTION

An exception occurred inside the method.

E_UNEXPECTED

Unexpected parameter or property type.

 

Remarks

The pen width is multiplied (or scaled) by the square root of the determinant of the view transform.

Note  If you have not set the pen width explicitly, it is 53 by default. You must multiply the pen width by the square root of the determinant to yield the correct bounding box. The height and width of the bounding box are expanded by half this amount in each direction.
 

For example, consider that the pen width is 53, the square root of the determinant is 50, and the bounding box is (0,0,1000,1000). The pen width adjustment to the bounding box in each direction is calculated as (53*50)/2, and the right and bottom sides are incremented by one. This results in a rendered bounding box of (-1325,-1325,2326,2326).

Note  Use the DrawStroke method to draw a single stroke.
 

The InkRenderer forces the viewport and window origins to 0, 0. Any existing settings are saved and restored, but is not used by the InkRenderer. To perform scrolling, use the InkRenderer object's view and object transform methods.

Requirements

Minimum supported client

Windows XP Tablet PC Edition [desktop apps only]

Minimum supported server

None supported

Header

Msinkaut.h (also requires Msinkaut_i.c)

Library

InkObj.dll

See also

InkRenderer Class
DrawStroke Method
InkDrawingAttributes Class
IInkStrokeDisp Interface
InkStrokes Collection

 

 

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