Unit conversion methods

Here's some ideas for the conversion methods. One possible (at least I belive it is possible... ;) ) solution would involve creating the following methods:

Rect Rect::Scale( const Point &cFromScale, const Point &cToScale ) - Scale Rect's dimensions and return a scaled Rect object. The scale is specified as Point value, or is chosen from one of the predefined scales:
DM_PIXEL
DM_POINT
DM_CM
DM_INCH
(etc.)

const Point& View::GetDPI() - Returns DPI value for the display a View object belongs to. (be it a monitor, a printer, a file or whatever you might want to scale something to.)

Point Point::operator*( const Point & ) - Multiplies x values and y values of two Points. (X = X1 * X2, Y = Y1 * Y2)

Examples

1 Rect cRect1( 10, 10, 10 10 ), cRect2;
2 
3 cRect2 = cRect1.Scale( DM_PIXEL * pcView->GetDPI(), DM_CM );

Discussion

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