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         signal_autosize_changed.emit();
  55 }
  56
  57 void Button::set_icon(const GL::Texture2D *i)
  58 {
  59         icon = i;
  60 }
  61
  62 void Button::render_special(const Part &part) const
  63 {
  64         if(part.get_name()=="text")
  65                 text.render(part, geom);
  66         if(part.get_name()=="icon" && icon)
  67         {
  68                 Geometry rgeom;
  69                 rgeom.w = icon->get_width();
  70                 rgeom.h = icon->get_height();
  71                 part.get_alignment().apply(rgeom, geom, part.get_margin());
  72
  73                 icon->bind();
  74                 GL::Immediate imm((GL::COLOR4_UBYTE, GL::TEXCOORD2, GL::VERTEX2));
  75                 imm.color(1.0f, 1.0f, 1.0f);
  76                 imm.begin(GL::QUADS);
  77                 imm.texcoord(0, 0);
  78                 imm.vertex(rgeom.x, rgeom.y);
  79                 imm.texcoord(1, 0);
  80                 imm.vertex(rgeom.x+rgeom.w, rgeom.y);
  81                 imm.texcoord(1, 1);
  82                 imm.vertex(rgeom.x+rgeom.w, rgeom.y+rgeom.h);
  83                 imm.texcoord(0, 1);
  84                 imm.vertex(rgeom.x, rgeom.y+rgeom.h);
  85                 imm.end();
  86                 GL::Texture::unbind();
  87         }
  88 }
  89
  90 void Button::button_press(int, int, unsigned btn)
  91 {
  92         if(btn==1)
  93         {
  94                 pressed = true;
  95                 state |= ACTIVE;
  96         }
  97 }
  98
  99 void Button::button_release(int x, int y, unsigned btn)
 100 {
 101         if(pressed && btn==1)
 102         {
 103                 state &= ~ACTIVE;
 104                 pressed = false;
 105
 106                 if(geom.is_inside_relative(x, y))
 107                         signal_clicked.emit();
 108         }
 109 }
 110
 111 void Button::pointer_motion(int x, int y)
 112 {
 113         if(pressed)
 114         {
 115                 if(!geom.is_inside_relative(x, y))
 116                         state &= ~ACTIVE;
 117                 else
 118                         state |= ACTIVE;
 119         }
 120 }
 121
 122 void Button::on_style_change()
 123 {
 124         text.set_style(style);
 125 }
 126
 127
 128 Button::Loader::Loader(Button &btn):
 129         Widget::Loader(btn)
 130 {
 131         add("text", &Loader::text);
 132 }
 133
 134 void Button::Loader::text(const std::string &t)
 135 {
 136         static_cast<Button &>(obj).text = t;
 137 }
 138
 139 } // namespace GLtk
 140 } // namespace Msp