QPaintDeviceMetrics Class Reference

The QPaintDeviceMetrics class provides information about a paint device. More...

#include <qpaintdevicemetrics.h>

List of all member functions.

Public Members

• QPaintDeviceMetrics ( const QPaintDevice * ) 
• enum { PdmWidth = 1, PdmHeight, PdmWidthMM, PdmHeightMM, PdmNumColors, PdmDepth, PdmDpiX, PdmDpiY }
• int width () const
• int height () const
• int widthMM () const
• int heightMM () const
• int logicalDpiX () const
• int logicalDpiY () const
• int numColors () const
• int depth () const

Detailed Description

Sometimes it is necessary to obtain information about the physical size of a paint device when drawing graphics.

Example:

    QPaintDeviceMetrics pdm( myWidget );
    double aspect = (double)pdm.widthMM / (double)pdm.heightMM();

Member Function Documentation

QPaintDeviceMetrics::QPaintDeviceMetrics ( const QPaintDevice * pd )

Constructs a metric for the paint device pd.

int QPaintDeviceMetrics::depth () const

Returns the bit depth (number of bit planes) of the paint device.

int QPaintDeviceMetrics::height () const

Returns the height of the paint device, in default coordinate system units (e.g. pixels for QPixmap and QWidget).

int QPaintDeviceMetrics::heightMM () const

Returns the height of the paint device, measured in millimeters.

int QPaintDeviceMetrics::numColors () const

Returns the number of different colors available for the paint device.

int QPaintDeviceMetrics::width () const

Returns the width of the paint device, in default coordinate system units (e.g. pixels for QPixmap and QWidget).

int QPaintDeviceMetrics::widthMM () const

Returns the width of the paint device, measured in millimeters.

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