| author | Francesco Abbate <francesco.bbt@gmail.com> | 2012年01月11日 16:41:22 +0100 |
|---|---|---|
| committer | Francesco Abbate <francesco.bbt@gmail.com> | 2012年01月30日 21:26:02 +0100 |
| commit | 3835be08da347dcaf854d61dc21f0cb52164ef8a (patch) | |
| tree | c2a6772c5dc17fbfb551fbdb36e4d4617a82dd31 /agg-plot/text-shape.h | |
| parent | 900c2a906c1a7ec8043b3f6eb9e74ec1c8f05063 (diff) | |
| download | gsl-shell-3835be08da347dcaf854d61dc21f0cb52164ef8a.tar.gz | |
| -rw-r--r-- | agg-plot/text-shape.h | 100 |
diff --git a/agg-plot/text-shape.h b/agg-plot/text-shape.h new file mode 100644 index 00000000..326ca9b8 --- /dev/null +++ b/agg-plot/text-shape.h @@ -0,0 +1,100 @@ +#ifndef AGGPLOT_TEXT_SHAPE_H +#define AGGPLOT_TEXT_SHAPE_H + +#include "agg_gsv_text.h" + +#include "sg_object.h" + +typedef sg_object_gen<agg::gsv_text> sg_text_base; + +namespace draw { + + class text_shape : public sg_object { + public: + text_shape(double x, double y, const char* text, + double _size = 10.0, double hjustif = 0.0, double vjustif = 0.0): + m_sg_text(), m_x(x), m_y(y), m_text(text), m_size(_size), + m_scaling(0), m_trans(m_sg_text, identity_matrix), m_stroke(m_trans) + { + agg::gsv_text& t = m_sg_text.self(); + t.text(text); + t.size(_size); + + const double text_width = t.text_width(), text_height = _size; + m_x -= hjustif * text_width; + m_y -= vjustif * text_height; + + t.start_point(m_x, m_y); + + m_stroke.line_cap(agg::round_cap); + m_stroke.line_join(agg::round_join); + } + + virtual void rewind(unsigned path_id) + { + m_sg_text.self().start_point(m_x, m_y); + m_stroke.rewind(path_id); + } + + virtual unsigned vertex(double* x, double* y) + { + return m_stroke.vertex(x, y); + } + + virtual void bounding_box(double *x1, double *y1, double *x2, double *y2) + { + agg::bounding_rect_single(m_sg_text, 0, x1, y1, x2, y2); + } + + virtual str write_svg(int id, agg::rgba8 c, double h) + { + const char* text = m_text.cstr(); + int txt_size = (int)(m_size * 1.5); + + const agg::trans_affine& m = *m_scaling; + + double x = m_x, y = -m_y; + const double dx = m.tx, dy = svg_y_coord(m.ty, h); + + if (is_unit_matrix(m)) + { + x += dx; + y += dy; + } + + str svgtext = str::print("<text x=\"%g\" y=\"%g\" id=\"text%i\"" \ + " style=\"font-size:%i\">" \ + " <tspan id=\"tspan%i\">%s</tspan>" \ + "</text>", + x, y, id, txt_size, id, text); + + str s; + if (is_unit_matrix(m)) + s = svgtext; + else + s = str::print("<g transform=\"matrix(%g,%g,%g,%g,%g,%g)\">%s</g>", + m.sx, m.shx, m.shy, m.sy, dx, dy, svgtext.cstr()); + + return s; + } + + virtual void apply_transform(const agg::trans_affine& m, double as) + { + m_stroke.width(1.5 * m.scale()); + m_trans.transformer(m); + m_scaling = &m; + } + + private: + sg_text_base m_sg_text; + double m_x, m_y; + str m_text; + double m_size; + + const agg::trans_affine* m_scaling; + agg::conv_transform<sg_object> m_trans; + agg::conv_stroke<agg::conv_transform<sg_object> > m_stroke; + }; +} + +#endif |