synfig-studio/tags/0.61.08/src/gtkmm/state_zoom.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file state_zoom.cpp
   3 **      \brief Zoom Tool Implementation File
   4 **
   5 **      $Id$
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
   9 **
  10 **      This package is free software; you can redistribute it and/or
  11 **      modify it under the terms of the GNU General Public License as
  12 **      published by the Free Software Foundation; either version 2 of
  13 **      the License, or (at your option) any later version.
  14 **
  15 **      This package is distributed in the hope that it will be useful,
  16 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18 **      General Public License for more details.
  19 **      \endlegal
  20 */
  21 /* ========================================================================= */
  22
  23 /* === H E A D E R S ======================================================= */
  24
  25 #ifdef USING_PCH
  26 #       include "pch.h"
  27 #else
  28 #ifdef HAVE_CONFIG_H
  29 #       include <config.h>
  30 #endif
  31
  32 #include <sigc++/signal.h>
  33 #include <sigc++/object.h>
  34
  35 #include <ETL/handle>
  36 #include <synfig/vector.h>
  37
  38
  39 #include "state_zoom.h"
  40 #include "event_mouse.h"
  41 #include "canvasview.h"
  42 #include "workarea.h"
  43 #include "app.h"
  44 #include "dialog_tooloptions.h"
  45 #include "toolbox.h"
  46 #include <synfigapp/main.h>
  47
  48 #include "general.h"
  49
  50 #endif
  51
  52 /* === U S I N G =========================================================== */
  53
  54 using namespace std;
  55 using namespace etl;
  56 using namespace synfig;
  57 using namespace studio;
  58
  59 /* === M A C R O S ========================================================= */
  60
  61 /* === G L O B A L S ======================================================= */
  62 StateZoom studio::state_zoom;
  63
  64 const float ZOOMFACTOR = 1.25f;
  65
  66 /* === C L A S S E S & S T R U C T S ======================================= */
  67
  68 class studio::StateZoom_Context : public sigc::trackable
  69 {
  70         etl::handle<CanvasView> canvas_view_;
  71         CanvasView::IsWorking is_working;
  72
  73         Point p1,p2;
  74
  75         bool prev_workarea_layer_status_;
  76
  77         //Toolbox settings
  78         synfigapp::Settings& settings;
  79
  80         //Toolbox display
  81         Gtk::Table options_table;
  82
  83 public:
  84
  85         void refresh_tool_options(); //to refresh the toolbox
  86
  87         //events
  88         Smach::event_result event_stop_handler(const Smach::event& x);
  89         Smach::event_result event_refresh_handler(const Smach::event& x);
  90         Smach::event_result event_mouse_click_handler(const Smach::event& x);
  91         Smach::event_result event_refresh_tool_options(const Smach::event& x);
  92
  93         //constructor destructor
  94         StateZoom_Context(CanvasView* canvas_view);
  95         ~StateZoom_Context();
  96
  97         //Canvas interaction
  98         const etl::handle<CanvasView>& get_canvas_view()const{return canvas_view_;}
  99         etl::handle<synfigapp::CanvasInterface> get_canvas_interface()const{return canvas_view_->canvas_interface();}
 100         synfig::Canvas::Handle get_canvas()const{return canvas_view_->get_canvas();}
 101         WorkArea * get_work_area()const{return canvas_view_->get_work_area();}
 102
 103         //Modifying settings etc.
 104         void load_settings();
 105         void save_settings();
 106         void reset();
 107
 108         //void zoom(const Point& p1, const Point& p2);
 109
 110 };      // END of class StateGradient_Context
 111
 112 /* === M E T H O D S ======================================================= */
 113
 114 StateZoom::StateZoom():
 115         Smach::state<StateZoom_Context>("zoom")
 116 {
 117         insert(event_def(EVENT_STOP,&StateZoom_Context::event_stop_handler));
 118         insert(event_def(EVENT_REFRESH,&StateZoom_Context::event_refresh_handler));
 119         insert(event_def(EVENT_WORKAREA_MOUSE_BUTTON_DOWN,&StateZoom_Context::event_mouse_click_handler));
 120         //insert(event_def(EVENT_WORKAREA_MOUSE_BUTTON_DRAG,&StateZoom_Context::event_mouse_click_handler));
 121         insert(event_def(EVENT_WORKAREA_BOX,&StateZoom_Context::event_mouse_click_handler));
 122         //insert(event_def(EVENT_WORKAREA_BUTTON_CLICK,&StateZoom_Context::event_mouse_click_handler));
 123         insert(event_def(EVENT_WORKAREA_MOUSE_BUTTON_UP,&StateZoom_Context::event_mouse_click_handler));
 124         insert(event_def(EVENT_REFRESH_TOOL_OPTIONS,&StateZoom_Context::event_refresh_tool_options));
 125 }
 126
 127 StateZoom::~StateZoom()
 128 {
 129 }
 130
 131 void
 132 StateZoom_Context::load_settings()
 133 {
 134         String value;
 135
 136         //parse the arguments yargh!
 137         /*if(settings.get_value("circle.feather",value))
 138                 set_feather(atof(value.c_str()));
 139         else
 140                 set_feather(0);*/
 141 }
 142
 143 void
 144 StateZoom_Context::save_settings()
 145 {
 146         //settings.set_value("circle.fallofftype",strprintf("%d",get_falloff()));
 147 }
 148
 149 void
 150 StateZoom_Context::reset()
 151 {
 152         //refresh_ducks();
 153 }
 154
 155 StateZoom_Context::StateZoom_Context(CanvasView* canvas_view):
 156         canvas_view_(canvas_view),
 157         is_working(*canvas_view),
 158         prev_workarea_layer_status_(get_work_area()->get_allow_layer_clicks()),
 159         settings(synfigapp::Main::get_selected_input_device()->settings())
 160 {
 161         // Set up the tool options dialog
 162         //options_table.attach(*manage(new Gtk::Label(_("Zoom Tool"))), 0, 2, 0, 1, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 163
 164         load_settings();
 165
 166         options_table.show_all();
 167
 168         refresh_tool_options();
 169         App::dialog_tool_options->present();
 170
 171         // Turn off layer clicking
 172         get_work_area()->set_allow_layer_clicks(false);
 173
 174         // clear out the ducks
 175         get_work_area()->clear_ducks(); //???
 176
 177         // Refresh the work area
 178         get_work_area()->queue_draw();
 179
 180         // Hide the tables if they are showing
 181         //prev_table_status=get_canvas_view()->tables_are_visible();
 182         //if(prev_table_status)get_canvas_view()->hide_tables();
 183
 184         // Disable the time bar
 185         //get_canvas_view()->set_sensitive_timebar(false);
 186
 187         // Connect a signal
 188         //get_work_area()->signal_user_click().connect(sigc::mem_fun(*this,&studio::StateZoom_Context::on_user_click));
 189         get_canvas_view()->work_area->set_cursor(Gdk::CROSSHAIR);
 190
 191         App::toolbox->refresh();
 192 }
 193
 194 void
 195 StateZoom_Context::refresh_tool_options()
 196 {
 197         App::dialog_tool_options->clear();
 198         App::dialog_tool_options->set_widget(options_table);
 199         App::dialog_tool_options->set_local_name(_("Zoom Tool"));
 200         App::dialog_tool_options->set_name("zoom");
 201 }
 202
 203 Smach::event_result
 204 StateZoom_Context::event_refresh_tool_options(const Smach::event& /*x*/)
 205 {
 206         refresh_tool_options();
 207         return Smach::RESULT_ACCEPT;
 208 }
 209
 210 StateZoom_Context::~StateZoom_Context()
 211 {
 212         save_settings();
 213
 214         // Restore layer clicking
 215         get_work_area()->set_allow_layer_clicks(prev_workarea_layer_status_);
 216         get_canvas_view()->work_area->reset_cursor();
 217
 218         App::dialog_tool_options->clear();
 219
 220         // Enable the time bar
 221         //get_canvas_view()->set_sensitive_timebar(true);
 222
 223         // Bring back the tables if they were out before
 224         //if(prev_table_status)get_canvas_view()->show_tables();
 225
 226         // Refresh the work area
 227         get_work_area()->queue_draw();
 228
 229         App::toolbox->refresh();
 230
 231         get_canvas_view()->get_smach().process_event(EVENT_REFRESH_DUCKS);
 232 }
 233
 234 Smach::event_result
 235 StateZoom_Context::event_stop_handler(const Smach::event& /*x*/)
 236 {
 237         throw Smach::egress_exception();
 238 }
 239
 240 Smach::event_result
 241 StateZoom_Context::event_refresh_handler(const Smach::event& /*x*/)
 242 {
 243         return Smach::RESULT_ACCEPT;
 244 }
 245
 246 Smach::event_result
 247 StateZoom_Context::event_mouse_click_handler(const Smach::event& x)
 248 {
 249         if(x.key==EVENT_WORKAREA_BOX)
 250         {
 251                 const EventBox& event(*reinterpret_cast<const EventBox*>(&x));
 252
 253                 if(event.button==BUTTON_LEFT)
 254                 {
 255                         //respond to event box...
 256
 257
 258                         //Center the new position at the center of the box
 259
 260                         //OH MY GOD HACK - the space is -1* and offset (by the value of the center of the canvas)...
 261                         Point newpos;
 262                         {
 263                                 const Point evcenter = (event.p1+event.p2)/2;
 264                                 const Point realcenter = (get_work_area()->get_window_tl() + get_work_area()->get_window_br())/2;
 265                                 newpos = -(evcenter - realcenter) + get_work_area()->get_focus_point();
 266                         }
 267
 268                         //The zoom will be whatever the required factor to convert current box size to desired box size
 269                         Point tl = get_work_area()->get_window_tl();
 270                         Point br = get_work_area()->get_window_br();
 271
 272                         Vector  span = br - tl;
 273                         Vector  v = event.p2 - event.p1;
 274
 275                         //get the minimum zoom as long as it's greater than 1...
 276                         v[0] = abs(v[0])/abs(span[0]);
 277                         v[1] = abs(v[1])/abs(span[1]);
 278
 279                         float zdiv = max(v[0],v[1]);
 280                         if(zdiv < 1 && zdiv > 0) //must be zoomable
 281                         {
 282                                 get_work_area()->set_focus_point(newpos);
 283                                 get_work_area()->set_zoom(get_work_area()->get_zoom()/zdiv);
 284                         }
 285
 286                         return Smach::RESULT_ACCEPT;
 287                 }
 288         }
 289
 290         if(x.key==EVENT_WORKAREA_MOUSE_BUTTON_UP)
 291         {
 292                 const EventMouse& event(*reinterpret_cast<const EventMouse*>(&x));
 293
 294                 if(event.button==BUTTON_LEFT)
 295                 {
 296                         Point evpos;
 297
 298                         //make the event pos be in the same space...
 299                         //   The weird ass inverted center normalized space...
 300                         {
 301                                 const Point realcenter = (get_work_area()->get_window_tl() + get_work_area()->get_window_br())/2;
 302                                 evpos = -(event.pos - realcenter) + get_work_area()->get_focus_point();
 303                         }
 304
 305                         /*      Zooming:
 306                                 focus point must zoom about the point evpos...
 307
 308                                 trans about an origin not 0:
 309                                 p' = A(p - o) + o
 310                         */
 311
 312                         Vector v = get_work_area()->get_focus_point() - evpos;
 313
 314                         if(event.modifier & Gdk::CONTROL_MASK) //zoom out...
 315                         {
 316                                 v*=ZOOMFACTOR;
 317                                 //get_work_area()->zoom_out();
 318                                 get_work_area()->set_focus_point(evpos + v);
 319                                 get_work_area()->set_zoom(get_work_area()->get_zoom()/ZOOMFACTOR);
 320                         }else //zoom in
 321                         {
 322                                 v/=ZOOMFACTOR;
 323                                 //get_work_area()->zoom_in();
 324                                 get_work_area()->set_focus_point(evpos + v);
 325                                 get_work_area()->set_zoom(get_work_area()->get_zoom()*ZOOMFACTOR);
 326                         }
 327
 328                         return Smach::RESULT_ACCEPT;
 329                 }
 330         }
 331
 332         return Smach::RESULT_OK;
 333 }