initial checkin of C++ port (in progress)

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@2 0fc631ac-6414-0410-93d0-97cfa31319b6

src/util/rotation.hpp

@@ -0,0 +1,123 @@
+//+----------------------------------------------------------------------------+
+//| Description:  Magic Set Editor - Program to make Magic (tm) cards          |
+//| Copyright:    (C) 2001 - 2006 Twan van Laarhoven                           |
+//| License:      GNU General Public License 2 or later (see file COPYING)     |
+//+----------------------------------------------------------------------------+
+
+#ifndef HEADER_UTIL_ROTATION
+#define HEADER_UTIL_ROTATION
+
+// ----------------------------------------------------------------------------- : Includes
+
+#include <util/prec.hpp>
+#include <util/real_point.hpp>
+#include <gfx/gfx.hpp>
+
+// ----------------------------------------------------------------------------- : Rotation
+
+/// An object that can rotate coordinates inside a specified rectangle
+/** This class has lots of tr*** functions, they convert
+ *  internal coordinates to external/screen coordinates.
+ *  tr***inv do the opposite.
+ */
+class Rotation {
+  public:
+	/// Construct a rotation object with the given rectangle of external coordinates
+	/// and a given rotation angle and zoom factor
+	Rotation(int angle, const RealRect& rect, double zoom = 1.0);
+	
+	/// Change the zoom factor
+	inline void setZoom(double z) { zoom = z; }
+	/// Change the angle
+	void setAngle(int a);
+	
+	/// Translate a size or length
+	inline double trS(double s) const { return  s * zoom; }
+	
+	/// Translate a single point
+	RealPoint tr(const RealPoint& p) const;
+	/// Translate a single size, the result may be negative
+	RealSize tr(const RealSize& s) const;
+	/// Translate a rectangle, the size of the result may be negative
+	RealRect tr(const RealRect& r) const;
+	
+	/// Translate a size, the result will never be negative
+	RealSize trNoNeg(const RealSize& s) const;
+	/// Translate a rectangle, the result will never have a negative size
+	RealRect trNoNeg(const RealRect& r) const;
+	
+	/// Translate a size or length back to internal 'coordinates'
+	inline double trInvS(double s) const { return  s / zoom; }
+	
+	/// Translate a point back to internal coordinates
+	RealPoint trInv(const RealPoint& p) const;
+	
+  private:
+	int angle;				//^ The angle of rotation in degrees (counterclockwise)
+	RealSize size;			//^ Size of the rectangle, in external coordinates
+	RealPoint origin;		//^ tr(0,0)
+	double zoom;			//^ Zoom factor, zoom = 2.0 means that 1 internal = 2 external
+	
+	/// Is the rotation sideways (90 or 270 degrees)?
+	// Note: angle & 2 == 0 for angle in {0, 180} and != 0 for angle in {90, 270)
+	inline bool sideways() const { return  (angle & 2) != 0; }
+	/// Is the x axis 'reversed' (after turning sideways)?
+	inline bool revX()     const { return  angle >= 180; }
+	/// Is the y axis 'reversed' (after turning sideways)?
+	inline bool revY()     const { return  angle == 90 || angle == 180; }
+	/// Negate if revX
+	inline double negX(double d) const { return revX() ? -d : d; }
+	/// Negate if revY
+	inline double negY(double d) const { return revY() ? -d : d; }
+};
+
+// ----------------------------------------------------------------------------- : Rotater
+
+/// An object that changes a rotation RIIA style
+/** Usage:
+ *  \begincode
+ *     Rotation a, b;
+ *     Rotater(a,b);
+ *     a.tr(x) // now acts as a.tr(b.tr(x))
+ *  \endcode
+ */
+class Rotater {
+	/// Compose a rotation by onto the rotation rot
+	/** rot is restored when this object is destructed
+	 */
+	Rotater(Rotation& rot, const Rotation& by);
+	~Rotater();
+};
+
+// ----------------------------------------------------------------------------- : RotatedDC
+
+/// A DC with rotation applied
+/** All draw** functions take internal coordinates.
+ */
+class RotatedDC : public Rotation {
+  public:
+	RotatedDC(int angle, const RealRect& rect, double zoom = 1.0);
+	RotatedDC(const Rotation& rotation);
+  
+	// ----------------------------- : Drawing
+	
+	void DrawText  (const String& text,   const RealPoint& pos);
+	void DrawBitmap(const Bitmap& bitmap, const RealPoint& pos);
+	void DrawImage (const Image& image,   const RealPoint& pos, ImageCombine combine = COMBINE_NORMAL);
+	void DrawLine  (const RealPoint& p1,  const RealPoint& p2);
+	void DrawRectangle(const RealRect& r);
+	void DrawRoundedRectangle(const RealRect& r, double radius);
+	
+	// ----------------------------- : Forwarded properties
+	
+	void SetPen(const wxPen&);
+	void SetBrush(const wxBrush&);
+	void SetTextForeground(const Color&);
+	void SetLogicalFunction(int function);
+	
+	RealSize getTextExtent(const String& string);
+	
+};
+
+// ----------------------------------------------------------------------------- : EOF
+#endif