source/button.cpp

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