Add protected functions for manipulating widget state

[libs/gltk.git] / source / text.cpp

diff --git a/source/text.cpp b/source/text.cpp
index 1b465120a31d5b5b50ff699969c646aaa5f625a8..0b582c5e8b6c0eb47b64784eef13fb3182161971 100644 (file)
--- a/source/text.cpp
+++ b/source/text.cpp
@@ -1,12 +1,6 @@
-/* $Id$
-
-This file is part of libmspgltk
-Copyright © 2009-2010  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
 #include <msp/gl/immediate.h>
 #include <msp/gl/matrix.h>
+#include <msp/gl/texture2d.h>
 #include "style.h"
 #include "text.h"
 
@@ -42,9 +36,13 @@ void Text::set_style(const Style *s)
 {
        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)
+       {
+               const GL::Font &font = style->get_font();
+               float font_size = style->get_font_size();
+               for(vector<Line>::iterator i=lines.begin(); i!=lines.end(); ++i)
+                       i->width = static_cast<unsigned>(font.get_string_width(text.substr(i->start, i->length))*font_size);
+       }
 }
 
 unsigned Text::get_width() const
@@ -57,9 +55,12 @@ unsigned Text::get_width() const
 
 unsigned Text::get_height() const
 {
-       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);
+       if(!style)
+               return lines.size();
+
+       const GL::Font &font = style->get_font();
+       float font_size = style->get_font_size();
+       unsigned line_height = static_cast<unsigned>((font.get_ascent()-font.get_descent())*font_size);
        unsigned line_spacing = line_height*6/5;
        return line_height+(lines.size()-1)*line_spacing;
 }
@@ -109,7 +110,7 @@ void Text::insert(unsigned pos, const string &s)
 unsigned Text::get_line_length(unsigned i) const
 {
        if(i>=lines.size())
-               throw InvalidParameterValue("Invalid line number");
+               throw out_of_range("Text::get_line_length");
        return lines[i].length;
 }
 
@@ -158,9 +159,10 @@ Geometry Text::coords_to_geometry(const Part &part, const Geometry &parent, unsi
 
 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();
        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);
@@ -168,6 +170,8 @@ void Text::render(const Part &part, const Geometry &parent, unsigned first_row)
        RenderData data;
        data.bld = &imm;
 
+       GL::Bind bind_tex(font.get_texture());
+
        process_lines<RenderData, &Text::render_line>(part, parent, first_row, data);
 }
 
@@ -180,7 +184,7 @@ 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_size() : 1);
        string::size_type start = 0;
        while(1)
        {
@@ -189,7 +193,12 @@ void Text::find_lines()
                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)
@@ -201,15 +210,18 @@ void Text::find_lines()
 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
 {
-       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);
+       if(!style)
+               return;
+
+       const GL::Font &font = style->get_font();
+       float font_size = style->get_font_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);
+       int y_offset = static_cast<int>(-font.get_descent()*font_size);
 
        const Sides &margin = part.get_margin();
-       unsigned n_lines = min(lines.size(), (parent.h-margin.top-margin.bottom)/line_spacing);
+       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)
@@ -229,24 +241,21 @@ void Text::process_lines(const Part &part, const Geometry &parent, unsigned firs
 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());
+       GL::scale_uniform(style->get_font_size());
 
-       font->draw_string(text.substr(line.start, line.length), *data.bld);
+       style->get_font().build_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();
-
+               float w = style->get_font().get_string_width(text.substr(lines[i].start, data.col));
                data.result = rgeom;
-               data.result.x += static_cast<unsigned>(font->get_string_width(text.substr(line.start, data.col))*font->get_default_size());
+               data.result.x += static_cast<unsigned>(w*style->get_font_size());
        }
 }