source/button.cpp

   1 #include <msp/gl/meshbuilder.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_special(const Part &part, Geometry &ageom) const
  20 {
  21         if(part.get_name()=="text")
  22                 text.autosize(part, ageom);
  23         else if(part.get_name()=="icon" && icon)
  24         {
  25                 const Sides &margin = part.get_margin();
  26                 ageom.w = max(ageom.w, icon->get_width()+margin.left+margin.right);
  27                 ageom.h = max(ageom.h, icon->get_height()+margin.top+margin.bottom);
  28         }
  29 }
  30
  31 void Button::set_text(const std::string &t)
  32 {
  33         text = t;
  34         signal_autosize_changed.emit();
  35         rebuild();
  36 }
  37
  38 void Button::set_icon(const GL::Texture2D *i)
  39 {
  40         icon = i;
  41         rebuild();
  42 }
  43
  44 void Button::rebuild_special(const Part &part)
  45 {
  46         if(part.get_name()=="text")
  47                 text.build(part, state, geom, part_cache);
  48         if(part.get_name()=="icon")
  49         {
  50                 if(icon)
  51                 {
  52                         Geometry rgeom;
  53                         rgeom.w = icon->get_width();
  54                         rgeom.h = icon->get_height();
  55                         part.get_alignment().apply(rgeom, geom, part.get_margin());
  56
  57                         GL::MeshBuilder bld(part_cache.create_mesh(part, *icon));
  58                         bld.color(1.0f, 1.0f, 1.0f);
  59                         bld.begin(GL::TRIANGLE_STRIP);
  60                         bld.texcoord(0, 1);
  61                         bld.vertex(rgeom.x, rgeom.y+rgeom.h);
  62                         bld.texcoord(0, 0);
  63                         bld.vertex(rgeom.x, rgeom.y);
  64                         bld.texcoord(1, 1);
  65                         bld.vertex(rgeom.x+rgeom.w, rgeom.y+rgeom.h);
  66                         bld.texcoord(1, 0);
  67                         bld.vertex(rgeom.x+rgeom.w, rgeom.y);
  68                         bld.end();
  69                 }
  70         }
  71 }
  72
  73 void Button::button_press(int, int, unsigned btn)
  74 {
  75         if(btn==1)
  76         {
  77                 pressed = true;
  78                 set_state(ACTIVE);
  79         }
  80 }
  81
  82 void Button::button_release(int x, int y, unsigned btn)
  83 {
  84         if(pressed && btn==1)
  85         {
  86                 clear_state(ACTIVE);
  87                 pressed = false;
  88
  89                 if(geom.is_inside_relative(x, y))
  90                         signal_clicked.emit();
  91         }
  92 }
  93
  94 void Button::pointer_motion(int x, int y)
  95 {
  96         if(pressed)
  97         {
  98                 if(!geom.is_inside_relative(x, y))
  99                         clear_state(ACTIVE);
 100                 else
 101                         set_state(ACTIVE);
 102         }
 103 }
 104
 105 void Button::on_style_change()
 106 {
 107         text.set_style(style);
 108 }
 109
 110
 111 Button::Loader::Loader(Button &btn):
 112         DataFile::DerivedObjectLoader<Button, Widget::Loader>(btn)
 113 {
 114         add("text", &Loader::text);
 115 }
 116
 117 void Button::Loader::text(const std::string &t)
 118 {
 119         obj.text = t;
 120 }
 121
 122 } // namespace GLtk
 123 } // namespace Msp