KiCad PCB EDA Suite
basic_gal.h
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1 /*
2  * This program source code file is part of KiCad, a free EDA CAD application.
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4  * Copyright (C) 2016 Jean-Pierre Charras, jp.charras at wanadoo.fr
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24 
25 #ifndef BASIC_GAL_H
26 #define BASIC_GAL_H
27 
28 #include <eda_rect.h>
29 
30 #include <gal/stroke_font.h>
32 #include <newstroke_font.h>
33 
34 class PLOTTER;
35 
36 
37 /*
38  * class BASIC_GAL is a minimal GAL implementation to draw, plot and convert
39  * stroke texts to a set of segments for DRC tests, and to calculate text sizes.
40  *
41  * Currently it allows one to use GAL and STROKE_FONT methods in legacy draw mode
42  * (using wxDC functions) in plot functions only for texts.
43  * It is used also to calculate the text bounding boxes
44  *
45  * The main purpose is to avoid duplicate code to do the same thing in GAL canvas
46  * legacy canvas, plotter canvas and DRC.
47  *
48  * It will be certainly removed when a full GAL canvas using wxDC is implemented
49  * (or at least restricted to plotter and DRC "canvas")
50  */
51 
52 struct TRANSFORM_PRM // A helper class to transform coordinates in BASIC_GAL canvas
53 {
56  double m_rotAngle;
57 };
58 
59 class BASIC_GAL: public KIGFX::GAL
60 {
61 public:
62  wxDC* m_DC;
64 
65 private:
67  std::stack <TRANSFORM_PRM> m_transformHistory;
68 
69 public:
70  BASIC_GAL( KIGFX::GAL_DISPLAY_OPTIONS& aDisplayOptions ) :
71  GAL( aDisplayOptions )
72  {
73  m_DC = NULL;
74  m_Color = RED;
75  m_plotter = NULL;
76  m_callback = NULL;
77  m_callbackData = nullptr;
78  m_isClipped = false;
79  }
80 
81  void SetPlotter( PLOTTER* aPlotter )
82  {
83  m_plotter = aPlotter;
84  }
85 
86  void SetCallback( void (* aCallback)( int x0, int y0, int xf, int yf, void* aData ), void* aData )
87  {
88  m_callback = aCallback;
89  m_callbackData = aData;
90  }
91 
94  void SetClipBox( EDA_RECT* aClipBox )
95  {
96  m_isClipped = aClipBox != NULL;
97 
98  if( aClipBox )
99  m_clipBox = *aClipBox;
100  }
101 
103  virtual void Save() override
104  {
105  m_transformHistory.push( m_transform );
106  }
107 
108  virtual void Restore() override
109  {
110  m_transform = m_transformHistory.top();
111  m_transformHistory.pop();
112  }
113 
114 
119  virtual void DrawPolyline( const std::deque<VECTOR2D>& aPointList ) override;
120 
125  virtual void DrawLine( const VECTOR2D& aStartPoint, const VECTOR2D& aEndPoint ) override;
126 
132  virtual void Translate( const VECTOR2D& aTranslation ) override
133  {
134  m_transform.m_moveOffset += aTranslation;
135  }
136 
142  virtual void Rotate( double aAngle ) override
143  {
144  m_transform.m_rotAngle = aAngle;
145  m_transform.m_rotCenter = m_transform.m_moveOffset;
146  }
147 
148 private:
149  // Apply the roation/translation transform to aPoint
150  const VECTOR2D transform( const VECTOR2D& aPoint ) const;
151 
152  // A clip box, to clip drawings in a wxDC (mandatory to avoid draw issues)
153  EDA_RECT m_clipBox; // The clip box
154  bool m_isClipped; // Allows/disallows clipping
155 
156  // When calling the draw functions outside a wxDC, to get the basic drawings
157  // lines / polylines ..., a callback function (used in DRC) to store
158  // coordinates of each segment:
159  void (* m_callback)( int x0, int y0, int xf, int yf, void* aData );
160  void* m_callbackData; // a optional parameter for m_callback
161 
162  // When calling the draw functions for plot, the plotter acts as a wxDC
163  // to plot basic items
165 };
166 
167 
168 extern BASIC_GAL basic_gal;
169 
170 #endif // define BASIC_GAL_H
bool m_isClipped
Definition: basic_gal.h:154
EDA_RECT m_clipBox
Definition: basic_gal.h:153
void SetCallback(void(*aCallback)(int x0, int y0, int xf, int yf, void *aData), void *aData)
Definition: basic_gal.h:86
std::stack< TRANSFORM_PRM > m_transformHistory
Definition: basic_gal.h:67
double m_rotAngle
Definition: basic_gal.h:56
virtual void Rotate(double aAngle) override
Rotate the context.
Definition: basic_gal.h:142
virtual void Save() override
Save the context.
Definition: basic_gal.h:103
COLOR4D m_Color
Definition: basic_gal.h:63
VECTOR2D m_moveOffset
Definition: basic_gal.h:55
void * m_callbackData
Definition: basic_gal.h:160
Definition: colors.h:60
virtual void Restore() override
Restore the context.
Definition: basic_gal.h:108
void SetPlotter(PLOTTER *aPlotter)
Definition: basic_gal.h:81
virtual void Translate(const VECTOR2D &aTranslation) override
Translate the context.
Definition: basic_gal.h:132
VECTOR2D m_rotCenter
Definition: basic_gal.h:54
PLOTTER * m_plotter
Definition: basic_gal.h:164
Base plotter engine class.
Definition: plotter.h:97
BASIC_GAL(KIGFX::GAL_DISPLAY_OPTIONS &aDisplayOptions)
Definition: basic_gal.h:70
wxDC * m_DC
Definition: basic_gal.h:62
Class EDA_RECT handles the component boundary box.
Definition: eda_rect.h:44
TRANSFORM_PRM m_transform
Definition: basic_gal.h:66
BASIC_GAL basic_gal
void SetClipBox(EDA_RECT *aClipBox)
Set a clip box for drawings If NULL, no clip will be made.
Definition: basic_gal.h:94
Class GAL is the abstract interface for drawing on a 2D-surface.
Class COLOR4D is the color representation with 4 components: red, green, blue, alpha.
Definition: color4d.h:39