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The Power in your Hands |
Scaling Class Reference
#include <Pt/Gfx/Scaling.h>
Logical-to-physical unit conversion. More...
Public Member Functions | |
| Scaling (double scaleFactor=1.0) | |
| Constructs a scaling with the given factor. | |
| double | scaleFactor () const |
| Returns the scale factor. | |
| void | setScaleFactor (double scaleFactor) |
| Sets the scale factor. | |
| double | toPhysical (double n) const |
| Converts a scalar value to physical units. | |
| Gfx::PointF | toPhysical (const Gfx::PointF &p) const |
| Converts a point to physical units. | |
| Gfx::SizeF | toPhysical (const Gfx::SizeF &s) const |
| Converts a size to physical units. | |
| Gfx::RectF | toPhysical (const Gfx::RectF &r) const |
| Converts a rectangle to physical units. | |
| double | toLogical (double n) const |
| Converts a scalar value to logical units. | |
| Gfx::PointF | toLogical (const Gfx::PointF &p) const |
| Converts a point to logical units. | |
| Gfx::SizeF | toLogical (const Gfx::SizeF &s) const |
| Converts a size to logical units. | |
| Gfx::RectF | toLogical (const Gfx::RectF &r) const |
| Converts a rectangle to logical units. | |
| double | align (double n) const |
| Aligns a scalar value to the nearest physical pixel. | |
| double | alignPixel (double n) const |
| Aligns a scalar value to a pixel center. | |
| double | alignContour (size_t n) const |
| Aligns a contour width while preserving visible thickness. | |
| Gfx::PointF | align (const Gfx::PointF &p) const |
| Aligns a point to physical pixels. | |
| Gfx::SizeF | align (const Gfx::SizeF &s) const |
| Aligns a size to physical pixels. | |
| Gfx::RectF | align (const Gfx::RectF &rect) const |
| Aligns a rectangle to physical pixels. | |
Related Functions | |
| bool | operator== (const Scaling &a, const Scaling &b) |
| Returns true if both scalings are equal. | |
| bool | operator!= (const Scaling &a, const Scaling &b) |
| Returns true if both scalings are different. | |
| bool | operator< (const Scaling &a, const Scaling &b) |
| Returns true if one scaling sorts before another. | |
Detailed Description
Scaling converts coordinates, sizes and rectangles between logical drawing units and physical device pixels. It also provides alignment helpers that snap geometry to pixel boundaries for crisp rendering.