synfig-studio/trunk/src/gtkmm/widget_gradient.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file widget_gradient.cpp
   3 **      \brief Template File
   4 **
   5 **      $Id$
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
   9 **      Copyright (c) 2007 Chris Moore
  10 **
  11 **      This package is free software; you can redistribute it and/or
  12 **      modify it under the terms of the GNU General Public License as
  13 **      published by the Free Software Foundation; either version 2 of
  14 **      the License, or (at your option) any later version.
  15 **
  16 **      This package is distributed in the hope that it will be useful,
  17 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  19 **      General Public License for more details.
  20 **      \endlegal
  21 */
  22 /* ========================================================================= */
  23
  24 /* === H E A D E R S ======================================================= */
  25
  26 #ifdef USING_PCH
  27 #       include "pch.h"
  28 #else
  29 #ifdef HAVE_CONFIG_H
  30 #       include <config.h>
  31 #endif
  32
  33 #include "widget_gradient.h"
  34 #include "app.h"
  35 #include <gtkmm/menu.h>
  36 #include <synfig/exception.h>
  37 #include <ETL/misc>
  38
  39 #endif
  40
  41 /* === U S I N G =========================================================== */
  42
  43 using namespace std;
  44 using namespace etl;
  45 using namespace synfig;
  46 using namespace studio;
  47
  48 /* === M A C R O S ========================================================= */
  49
  50 /* === G L O B A L S ======================================================= */
  51
  52 /* === P R O C E D U R E S ================================================= */
  53
  54 void
  55 studio::render_gradient_to_window(const Glib::RefPtr<Gdk::Drawable>& window,const Gdk::Rectangle& ca,const synfig::Gradient &gradient)
  56 {
  57         int     height = ca.get_height();
  58         int     width = ca.get_width()-4;
  59
  60         float sample_width(1.0f/(float)width);
  61         Glib::RefPtr<Gdk::GC> gc(Gdk::GC::create(window));
  62         const Color bg1(0.25, 0.25, 0.25);
  63         const Color bg2(0.5, 0.5, 0.5);
  64         Gdk::Color gdk_c;
  65         int i;
  66         for(i=0;i<width;i++)
  67         {
  68                 const Color c(gradient(float(i)/float(width),sample_width));
  69                 const Color c1(Color::blend(c,bg1,1.0).clamped());
  70                 const Color c2(Color::blend(c,bg2,1.0).clamped());
  71                 gushort r1(256*App::gamma.r_F32_to_U8(c1.get_r()));
  72                 gushort g1(256*App::gamma.g_F32_to_U8(c1.get_g()));
  73                 gushort b1(256*App::gamma.b_F32_to_U8(c1.get_b()));
  74                 gushort r2(256*App::gamma.r_F32_to_U8(c2.get_r()));
  75                 gushort g2(256*App::gamma.g_F32_to_U8(c2.get_g()));
  76                 gushort b2(256*App::gamma.b_F32_to_U8(c2.get_b()));
  77
  78                 if((i*2/height)&1)
  79                 {
  80                         gdk_c.set_rgb(r1,g1,b1);
  81                         gc->set_rgb_fg_color(gdk_c);
  82                         window->draw_rectangle(gc, true, ca.get_x()+i+2, ca.get_y(), 1, height/2);
  83
  84                         gdk_c.set_rgb(r2,g2,b2);
  85                         gc->set_rgb_fg_color(gdk_c);
  86                         window->draw_rectangle(gc, true, ca.get_x()+i+2, ca.get_y()+height/2, 1, height/2);
  87                 }
  88                 else
  89                 {
  90                         gdk_c.set_rgb(r2,g2,b2);
  91                         gc->set_rgb_fg_color(gdk_c);
  92                         window->draw_rectangle(gc, true, ca.get_x()+i+2, ca.get_y(), 1, height/2);
  93
  94                         gdk_c.set_rgb(r1,g1,b1);
  95                         gc->set_rgb_fg_color(gdk_c);
  96                         window->draw_rectangle(gc, true, ca.get_x()+i+2, ca.get_y()+height/2, 1, height/2);
  97                 }
  98         }
  99         gc->set_rgb_fg_color(Gdk::Color("#ffffff"));
 100         window->draw_rectangle(gc, false, ca.get_x()+1, ca.get_y()+1, ca.get_width()-3, height-3);
 101         gc->set_rgb_fg_color(Gdk::Color("#000000"));
 102         window->draw_rectangle(gc, false, ca.get_x(), ca.get_y(), ca.get_width()-1, height-1);
 103 }
 104
 105 /* === M E T H O D S ======================================================= */
 106
 107 Widget_Gradient::Widget_Gradient():
 108         editable_(false)
 109 {
 110         set_size_request(-1,64);
 111         signal_expose_event().connect(sigc::mem_fun(*this, &studio::Widget_Gradient::redraw));
 112         add_events(Gdk::BUTTON_PRESS_MASK | Gdk::BUTTON_RELEASE_MASK);
 113         add_events(Gdk::BUTTON1_MOTION_MASK);
 114
 115 }
 116
 117 Widget_Gradient::~Widget_Gradient()
 118 {
 119 }
 120
 121 #define CONTROL_HEIGHT          16
 122 bool
 123 Widget_Gradient::redraw(GdkEventExpose */*bleh*/)
 124 {
 125         const int h(get_height());
 126         const int w(get_width());
 127
 128         Glib::RefPtr<Gdk::GC> gc(Gdk::GC::create(get_window()));
 129         Gdk::Rectangle area(0,0,w,h);
 130         if(!editable_)
 131         {
 132                 render_gradient_to_window(get_window(),area,gradient_);
 133                 return true;
 134         }
 135
 136         render_gradient_to_window(get_window(),Gdk::Rectangle(0,0,w,h-CONTROL_HEIGHT),gradient_);
 137
 138         gc->set_rgb_fg_color(Gdk::Color("#7f7f7f"));
 139         get_window()->draw_rectangle(gc, false, 0, h-CONTROL_HEIGHT, w, CONTROL_HEIGHT);
 140
 141         Gradient::iterator iter,selected_iter;
 142         bool show_selected(false);
 143         for(iter=gradient_.begin();iter!=gradient_.end();iter++)
 144         {
 145                 if(*iter!=selected_cpoint)
 146                 get_style()->paint_arrow(
 147                         get_window(),
 148                         (*iter==selected_cpoint)?Gtk::STATE_SELECTED:Gtk::STATE_ACTIVE,
 149                         Gtk::SHADOW_OUT,
 150                         area,
 151                         *this,
 152                         " ",
 153                         Gtk::ARROW_UP,
 154                         1,
 155                         int(iter->pos*w)-CONTROL_HEIGHT/2+1,
 156                         h-CONTROL_HEIGHT,
 157                         CONTROL_HEIGHT,
 158                         CONTROL_HEIGHT
 159                 );
 160                 else
 161                 {
 162                         selected_iter=iter;
 163                         show_selected=true;
 164                 }
 165         }
 166
 167         // we do this so that we can be sure that
 168         // the selected marker is shown on top
 169         if(show_selected)
 170         {
 171                 get_style()->paint_arrow(
 172                         get_window(),
 173                         Gtk::STATE_SELECTED,
 174                         Gtk::SHADOW_OUT,
 175                         area,
 176                         *this,
 177                         " ",
 178                         Gtk::ARROW_UP,
 179                         1,
 180                         round_to_int(selected_iter->pos*w)-CONTROL_HEIGHT/2+1,
 181                         h-CONTROL_HEIGHT,
 182                         CONTROL_HEIGHT,
 183                         CONTROL_HEIGHT
 184                 );
 185         }
 186
 187         return true;
 188 }
 189
 190 void
 191 Widget_Gradient::insert_cpoint(float x)
 192 {
 193         Gradient::CPoint new_cpoint;
 194         new_cpoint.pos=x;
 195         new_cpoint.color=gradient_(x);
 196         gradient_.push_back(new_cpoint);
 197         gradient_.sort();
 198         gradient_.sort();
 199         set_selected_cpoint(new_cpoint);
 200         queue_draw();
 201 }
 202
 203 void
 204 Widget_Gradient::remove_cpoint(float x)
 205 {
 206         gradient_.erase(gradient_.proximity(x));
 207         signal_value_changed_();
 208         queue_draw();
 209 }
 210
 211 void
 212 Widget_Gradient::popup_menu(float x)
 213 {
 214         Gtk::Menu* menu(manage(new Gtk::Menu()));
 215
 216         menu->items().clear();
 217
 218         menu->items().push_back(
 219                 Gtk::Menu_Helpers::MenuElem(
 220                         _("Insert CPoint"),
 221                         sigc::bind(
 222                                 sigc::mem_fun(*this,&studio::Widget_Gradient::insert_cpoint),
 223                                 x
 224                         )
 225                 )
 226         );
 227
 228         if(!gradient_.empty())
 229         {
 230                 menu->items().push_back(
 231                         Gtk::Menu_Helpers::MenuElem(
 232                                 _("Remove CPoint"),
 233                                 sigc::bind(
 234                                         sigc::mem_fun(*this,&studio::Widget_Gradient::remove_cpoint),
 235                                         x
 236                                 )
 237                         )
 238                 );
 239         }
 240
 241         menu->popup(0,0);
 242 }
 243
 244 void
 245 Widget_Gradient::set_value(const synfig::Gradient& x)
 246 {
 247         gradient_=x;
 248         if(gradient_.size())
 249                 set_selected_cpoint(*gradient_.proximity(0.0f));
 250         queue_draw();
 251 }
 252
 253 void
 254 Widget_Gradient::set_selected_cpoint(const synfig::Gradient::CPoint &x)
 255 {
 256         selected_cpoint=x;
 257         signal_cpoint_selected_(selected_cpoint);
 258         queue_draw();
 259 }
 260
 261 void
 262 Widget_Gradient::update_cpoint(const synfig::Gradient::CPoint &x)
 263 {
 264         try
 265         {
 266                 Gradient::iterator iter(gradient_.find(x));
 267                 iter->pos=x.pos;
 268                 iter->color=x.color;
 269                 gradient_.sort();
 270                 queue_draw();
 271         }
 272         catch(synfig::Exception::NotFound)
 273         {
 274                 // Yotta...
 275         }
 276 }
 277
 278 bool
 279 Widget_Gradient::on_event(GdkEvent *event)
 280 {
 281         //if(editable_)
 282         {
 283                 const int x(static_cast<int>(event->button.x));
 284                 const int y(static_cast<int>(event->button.y));
 285
 286                 float pos((float)x/(float)get_width());
 287                 if(pos<0.0f)pos=0.0f;
 288                 if(pos>1.0f)pos=1.0f;
 289
 290                 switch(event->type)
 291                 {
 292                 case GDK_MOTION_NOTIFY:
 293                         if(editable_ && y>get_height()-CONTROL_HEIGHT)
 294                         {
 295                                 Gradient::iterator iter(gradient_.find(selected_cpoint));
 296
 297                                 if(event->button.state&GDK_SHIFT_MASK)
 298                                 {
 299                                         float begin(-100000000),end(100000000);
 300                                         Gradient::iterator before(iter),after(iter);
 301                                         after++;
 302                                         if(iter!=gradient_.begin())
 303                                         {
 304                                                 before--;
 305                                                 begin=before->pos;
 306                                         }
 307                                         if(after!=gradient_.end())
 308                                         {
 309                                                 end=after->pos;
 310                                         }
 311
 312                                         if(pos>end)
 313                                                 pos=end;
 314                                         if(pos<begin)
 315                                                 pos=begin;
 316
 317                                         iter->pos=pos;
 318                                 }
 319                                 else
 320                                 {
 321                                         iter->pos=pos;
 322                                         gradient_.sort();
 323                                 }
 324
 325 //                              signal_value_changed_();
 326                                 changed_=true;
 327                                 queue_draw();
 328                                 return true;
 329                         }
 330                         break;
 331                 case GDK_BUTTON_PRESS:
 332                         changed_=false;
 333                         if(event->button.button==1)
 334                         {
 335                                 if(editable_ && y>get_height()-CONTROL_HEIGHT)
 336                                 {
 337                                         set_selected_cpoint(*gradient_.proximity(pos));
 338                                         queue_draw();
 339                                         return true;
 340                                 }
 341                                 else
 342                                 {
 343                                         signal_clicked_();
 344                                         return true;
 345                                 }
 346                         }
 347                         else if(editable_ && event->button.button==3)
 348                         {
 349                                 popup_menu(pos);
 350                                 return true;
 351                         }
 352                         break;
 353                 case GDK_BUTTON_RELEASE:
 354                         if(editable_ && event->button.button==1 && y>get_height()-CONTROL_HEIGHT)
 355                         {
 356                                 set_selected_cpoint(*gradient_.proximity(pos));
 357                                 if(changed_)signal_value_changed_();
 358                                 return true;
 359                         }
 360                 default:
 361                         break;
 362                 }
 363         }
 364
 365         return false;
 366 }