source/button.cpp

   1 /* $Id$
   2
   3 This file is part of libmspgltk
   4 Copyright © 2007-2011  Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include <msp/gl/immediate.h>
   9 #include "button.h"
  10 #include "part.h"
  11 #include "style.h"
  12
  13 using namespace std;
  14
  15 namespace Msp {
  16 namespace GLtk {
  17
  18 Button::Button(const std::string &t):
  19         text(),
  20         icon(0),
  21         pressed(false)
  22 {
  23         set_text(t);
  24 }
  25
  26 void Button::autosize()
  27 {
  28         if(!style)
  29                 return;
  30
  31         Widget::autosize();
  32
  33         if(const Part *text_part = style->get_part("text"))
  34         {
  35                 const Sides &margin = text_part->get_margin();
  36                 geom.w = max(geom.w, text.get_width()+margin.left+margin.right);
  37                 geom.h = max(geom.h, text.get_height()+margin.top+margin.bottom);
  38         }
  39
  40         if(icon)
  41         {
  42                 if(const Part *icon_part = style->get_part("icon"))
  43                 {
  44                         const Sides &margin = icon_part->get_margin();
  45                         geom.w = max(geom.w, icon->get_width()+margin.left+margin.right);
  46                         geom.h = max(geom.h, icon->get_height()+margin.top+margin.bottom);
  47                 }
  48         }
  49 }
  50
  51 void Button::set_text(const std::string &t)
  52 {
  53         text = t;
  54 }
  55
  56 void Button::set_icon(const GL::Texture2D *i)
  57 {
  58         icon = i;
  59 }
  60
  61 void Button::render_special(const Part &part) const
  62 {
  63         if(part.get_name()=="text")
  64                 text.render(part, geom);
  65         if(part.get_name()=="icon" && icon)
  66         {
  67                 Geometry rgeom;
  68                 rgeom.w = icon->get_width();
  69                 rgeom.h = icon->get_height();
  70                 part.get_alignment().apply(rgeom, geom, part.get_margin());
  71
  72                 icon->bind();
  73                 GL::Immediate imm((GL::COLOR4_UBYTE, GL::TEXCOORD2, GL::VERTEX2));
  74                 imm.color(1.0f, 1.0f, 1.0f);
  75                 imm.begin(GL::QUADS);
  76                 imm.texcoord(0, 0);
  77                 imm.vertex(rgeom.x, rgeom.y);
  78                 imm.texcoord(1, 0);
  79                 imm.vertex(rgeom.x+rgeom.w, rgeom.y);
  80                 imm.texcoord(1, 1);
  81                 imm.vertex(rgeom.x+rgeom.w, rgeom.y+rgeom.h);
  82                 imm.texcoord(0, 1);
  83                 imm.vertex(rgeom.x, rgeom.y+rgeom.h);
  84                 imm.end();
  85                 GL::Texture::unbind();
  86         }
  87 }
  88
  89 void Button::button_press(int, int, unsigned btn)
  90 {
  91         if(btn==1)
  92         {
  93                 pressed = true;
  94                 state |= ACTIVE;
  95         }
  96 }
  97
  98 void Button::button_release(int x, int y, unsigned btn)
  99 {
 100         if(pressed && btn==1)
 101         {
 102                 state &= ~ACTIVE;
 103                 pressed = false;
 104
 105                 if(geom.is_inside_relative(x, y))
 106                         signal_clicked.emit();
 107         }
 108 }
 109
 110 void Button::pointer_motion(int x, int y)
 111 {
 112         if(pressed)
 113         {
 114                 if(!geom.is_inside_relative(x, y))
 115                         state &= ~ACTIVE;
 116                 else
 117                         state |= ACTIVE;
 118         }
 119 }
 120
 121 void Button::on_style_change()
 122 {
 123         text.set_style(style);
 124 }
 125
 126
 127 Button::Loader::Loader(Button &btn):
 128         Widget::Loader(btn)
 129 {
 130         add("text", &Loader::text);
 131 }
 132
 133 void Button::Loader::text(const std::string &t)
 134 {
 135         static_cast<Button &>(obj).text = t;
 136 }
 137
 138 } // namespace GLtk
 139 } // namespace Msp