namespace Msp {
namespace GLtk {
+struct Text::RenderData
+{
+ GL::PrimitiveBuilder *bld;
+};
+
+struct Text::CoordsToGeomData
+{
+ unsigned row;
+ unsigned col;
+ Geometry result;
+};
+
+
Text::Text():
style(0)
{ }
{
style = s;
- float font_size = style->get_font()->get_default_size();
- for(vector<Line>::iterator i=lines.begin(); i!=lines.end(); ++i)
- i->width = static_cast<unsigned>(style->get_font()->get_string_width(text.substr(i->start, i->length))*font_size);
+ if(style)
+ {
+ float font_size = style->get_font()->get_default_size();
+ for(vector<Line>::iterator i=lines.begin(); i!=lines.end(); ++i)
+ i->width = static_cast<unsigned>(style->get_font()->get_string_width(text.substr(i->start, i->length))*font_size);
+ }
}
unsigned Text::get_width() const
unsigned Text::get_height() const
{
+ if(!style)
+ return lines.size();
+
const GL::Font *font = style->get_font();
float font_size = font->get_default_size();
unsigned line_height = static_cast<unsigned>((font->get_ascent()-font->get_descent())*font_size);
return lines[row].start+min(col, lines[row].length);
}
-Geometry Text::coords_to_geometry(unsigned row, unsigned col) const
+Geometry Text::coords_to_geometry(const Part &part, const Geometry &parent, unsigned first_row, unsigned row, unsigned col) const
{
if(row>=lines.size())
row = lines.size()-1;
if(col>line.length)
col = line.length;
- const GL::Font *font = style->get_font();
- float font_size = font->get_default_size();
- unsigned line_height = static_cast<unsigned>((font->get_ascent()-font->get_descent())*font_size);
- unsigned line_spacing = static_cast<unsigned>(font_size*6/5);
- unsigned height = line_height+(lines.size()-1)*line_spacing;
- int y_offset = static_cast<int>(-font->get_descent()*font_size);
+ CoordsToGeomData data;
+ data.row = row;
+ data.col = col;
- Geometry geom;
- geom.w = line.width;
- geom.h = height;
- geom.x = static_cast<unsigned>(font->get_string_width(text.substr(line.start, col))*font_size);
- geom.y = (lines.size()-1-row)*line_spacing+y_offset;
+ process_lines<CoordsToGeomData, &Text::coords_to_geom_line>(part, parent, first_row, data);
- return geom;
+ return data.result;
}
-void Text::render(const Part &part, const Geometry &geom) const
+void Text::render(const Part &part, const Geometry &parent, unsigned first_row) const
{
- if(lines.empty())
+ if(!style || lines.empty())
return;
- const GL::Font *font = style->get_font();
- float font_size = font->get_default_size();
- unsigned line_height = static_cast<unsigned>((font->get_ascent()-font->get_descent())*font_size);
- unsigned line_spacing = static_cast<unsigned>(font_size*6/5);
- unsigned height = line_height+(lines.size()-1)*line_spacing;
- int y_offset = static_cast<int>(-font->get_descent()*font_size);
-
const GL::Color &color = style->get_font_color();
GL::Immediate imm((GL::COLOR4_UBYTE, GL::TEXCOORD2, GL::VERTEX2));
imm.color(color.r, color.g, color.b);
- for(unsigned i=0; i<lines.size(); ++i)
- {
- const Line &line = lines[i];
- Geometry rgeom;
- rgeom.w = line.width;
- rgeom.h = height;
- rgeom.y = (lines.size()-1-i)*line_spacing+y_offset;
- part.get_alignment().apply(rgeom, geom, part.get_margin());
-
- GL::push_matrix();
- GL::translate(rgeom.x, rgeom.y, 0);
- GL::scale_uniform(font_size);
+ RenderData data;
+ data.bld = &imm;
- font->draw_string(text.substr(line.start, line.length), imm);
-
- GL::pop_matrix();
- }
+ process_lines<RenderData, &Text::render_line>(part, parent, first_row, data);
}
Text &Text::operator=(const string &t)
void Text::find_lines()
{
lines.clear();
- float font_size = style->get_font()->get_default_size();
+ float font_size = (style ? style->get_font()->get_default_size() : 1);
string::size_type start = 0;
while(1)
{
Line line;
line.start = start;
line.length = (newline==string::npos ? text.size() : newline)-start;
- line.width = static_cast<unsigned>(style->get_font()->get_string_width(text.substr(line.start, line.length))*font_size);
+ line.width = line.length;
+ if(style)
+ {
+ string str = text.substr(line.start, line.length);
+ line.width = static_cast<unsigned>(style->get_font()->get_string_width(str)*font_size);
+ }
lines.push_back(line);
if(newline==string::npos)
}
}
+template<typename T, void (Text::*func)(unsigned, const Geometry &, T &) const>
+void Text::process_lines(const Part &part, const Geometry &parent, unsigned first_row, T &data) const
+{
+ if(!style)
+ return;
+
+ const GL::Font *font = style->get_font();
+ float font_size = font->get_default_size();
+ unsigned line_height = static_cast<unsigned>((font->get_ascent()-font->get_descent())*font_size);
+ unsigned line_spacing = static_cast<unsigned>(font_size*6/5);
+ unsigned height = line_height+(lines.size()-1)*line_spacing;
+ int y_offset = static_cast<int>(-font->get_descent()*font_size);
+
+ const Sides &margin = part.get_margin();
+ unsigned n_lines = min(lines.size(), max((parent.h-margin.top-margin.bottom)/line_spacing, 1U));
+ first_row = min(first_row, lines.size()-n_lines);
+
+ for(unsigned i=0; i<n_lines; ++i)
+ {
+ const Line &line = lines[first_row+i];
+
+ Geometry rgeom;
+ rgeom.w = line.width;
+ rgeom.h = height;
+ rgeom.y = (n_lines-1-i)*line_spacing+y_offset;
+ part.get_alignment().apply(rgeom, parent, part.get_margin());
+
+ (this->*func)(first_row+i, rgeom, data);
+ }
+}
+
+void Text::render_line(unsigned i, const Geometry &rgeom, RenderData &data) const
+{
+ const Line &line = lines[i];
+ const GL::Font *font = style->get_font();
+
+ GL::PushMatrix _pushm;
+ GL::translate(rgeom.x, rgeom.y, 0);
+ GL::scale_uniform(font->get_default_size());
+
+ font->draw_string(text.substr(line.start, line.length), *data.bld);
+}
+
+void Text::coords_to_geom_line(unsigned i, const Geometry &rgeom, CoordsToGeomData &data) const
+{
+ if(i==data.row)
+ {
+ const Line &line = lines[i];
+ const GL::Font *font = style->get_font();
+
+ data.result = rgeom;
+ data.result.x += static_cast<unsigned>(font->get_string_width(text.substr(line.start, data.col))*font->get_default_size());
+ }
+}
+
} // namespace GLtk
} // namespace Msp
projects / libs / gltk.git / blobdiff