160 lines
5.6 KiB
C++
160 lines
5.6 KiB
C++
//----------------------------------------------------------------------------
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// Anti-Grain Geometry - Version 2.4
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// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
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//
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// Permission to copy, use, modify, sell and distribute this software
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// is granted provided this copyright notice appears in all copies.
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// This software is provided "as is" without express or implied
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// warranty, and with no claim as to its suitability for any purpose.
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//
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//----------------------------------------------------------------------------
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// Contact: mcseem@antigrain.com
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// mcseemagg@yahoo.com
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// http://www.antigrain.com
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//----------------------------------------------------------------------------
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//
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// classes spline_ctrl_impl, spline_ctrl
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//
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//----------------------------------------------------------------------------
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#ifndef AGG_SPLINE_CTRL_INCLUDED
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#define AGG_SPLINE_CTRL_INCLUDED
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#include "agg_basics.h"
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#include "agg_ellipse.h"
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#include "agg_bspline.h"
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#include "agg_conv_stroke.h"
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#include "agg_path_storage.h"
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#include "agg_trans_affine.h"
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#include "agg_color_rgba.h"
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#include "agg_ctrl.h"
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namespace agg
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{
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//------------------------------------------------------------------------
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// Class that can be used to create an interactive control to set up
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// gamma arrays.
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//------------------------------------------------------------------------
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class spline_ctrl_impl : public ctrl
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{
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public:
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spline_ctrl_impl(double x1, double y1, double x2, double y2,
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unsigned num_pnt, bool flip_y=false);
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// Set other parameters
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void border_width(double t, double extra=0.0);
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void curve_width(double t) { m_curve_width = t; }
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void point_size(double s) { m_point_size = s; }
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// Event handlers. Just call them if the respective events
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// in your system occure. The functions return true if redrawing
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// is required.
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virtual bool in_rect(double x, double y) const;
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virtual bool on_mouse_button_down(double x, double y);
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virtual bool on_mouse_button_up(double x, double y);
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virtual bool on_mouse_move(double x, double y, bool button_flag);
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virtual bool on_arrow_keys(bool left, bool right, bool down, bool up);
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void active_point(int i);
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const double* spline() const { return m_spline_values; }
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const int8u* spline8() const { return m_spline_values8; }
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double value(double x) const;
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void value(unsigned idx, double y);
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void point(unsigned idx, double x, double y);
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void x(unsigned idx, double x) { m_xp[idx] = x; }
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void y(unsigned idx, double y) { m_yp[idx] = y; }
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double x(unsigned idx) const { return m_xp[idx]; }
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double y(unsigned idx) const { return m_yp[idx]; }
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void update_spline();
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// Vertex soutce interface
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unsigned num_paths() { return 5; }
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void rewind(unsigned path_id);
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unsigned vertex(double* x, double* y);
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private:
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void calc_spline_box();
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void calc_curve();
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double calc_xp(unsigned idx);
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double calc_yp(unsigned idx);
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void set_xp(unsigned idx, double val);
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void set_yp(unsigned idx, double val);
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unsigned m_num_pnt;
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double m_xp[32];
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double m_yp[32];
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bspline m_spline;
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double m_spline_values[256];
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int8u m_spline_values8[256];
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double m_border_width;
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double m_border_extra;
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double m_curve_width;
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double m_point_size;
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double m_xs1;
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double m_ys1;
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double m_xs2;
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double m_ys2;
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path_storage m_curve_pnt;
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conv_stroke<path_storage> m_curve_poly;
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ellipse m_ellipse;
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unsigned m_idx;
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unsigned m_vertex;
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double m_vx[32];
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double m_vy[32];
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int m_active_pnt;
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int m_move_pnt;
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double m_pdx;
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double m_pdy;
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const trans_affine* m_mtx;
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};
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template<class ColorT> class spline_ctrl : public spline_ctrl_impl
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{
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public:
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spline_ctrl(double x1, double y1, double x2, double y2,
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unsigned num_pnt, bool flip_y=false) :
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spline_ctrl_impl(x1, y1, x2, y2, num_pnt, flip_y),
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m_background_color(rgba(1.0, 1.0, 0.9)),
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m_border_color(rgba(0.0, 0.0, 0.0)),
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m_curve_color(rgba(0.0, 0.0, 0.0)),
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m_inactive_pnt_color(rgba(0.0, 0.0, 0.0)),
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m_active_pnt_color(rgba(1.0, 0.0, 0.0))
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{
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m_colors[0] = &m_background_color;
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m_colors[1] = &m_border_color;
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m_colors[2] = &m_curve_color;
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m_colors[3] = &m_inactive_pnt_color;
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m_colors[4] = &m_active_pnt_color;
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}
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// Set colors
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void background_color(const ColorT& c) { m_background_color = c; }
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void border_color(const ColorT& c) { m_border_color = c; }
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void curve_color(const ColorT& c) { m_curve_color = c; }
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void inactive_pnt_color(const ColorT& c) { m_inactive_pnt_color = c; }
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void active_pnt_color(const ColorT& c) { m_active_pnt_color = c; }
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const ColorT& color(unsigned i) const { return *m_colors[i]; }
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private:
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spline_ctrl(const spline_ctrl<ColorT>&);
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const spline_ctrl<ColorT>& operator = (const spline_ctrl<ColorT>&);
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ColorT m_background_color;
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ColorT m_border_color;
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ColorT m_curve_color;
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ColorT m_inactive_pnt_color;
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ColorT m_active_pnt_color;
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ColorT* m_colors[5];
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};
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}
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#endif
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