Inside Macintosh: QuickDraw GX Environment and Utilities /

Chapter 1 - QuickDraw GX and the Macintosh Environment / QuickDraw GX and the Macintosh Environment Reference

Macintosh Interface Functions / Converting From QuickDraw to QuickDraw GX Coordinates

GXGetViewPortMouse

You can use the GXGetViewPortMouse function to obtain the cursor position expressed in the QuickDraw GX local coordinates of the specified view port.

void GXGetViewPortMouse(gxViewPort portOrder, gxPoint *localPt);

portOrder

A reference to the view port for which the cursor position is requested.

localPt

A pointer to a gxPoint structure. On return, the structure contains the fixed-point local coordinates of the current cursor position.

SPECIAL CONSIDERATIONS

If the portOrder parameter is nil, this function posts an invalid_viewPort_reference error.

ERRORS, WARNINGS, AND NOTICES

Errors

out_of_memory

invalid_viewPort_reference

Warnings

point_does_not_intersect_port