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

   1 /* === S I N F G =========================================================== */
   2 /*!     \file state_zoom.cpp
   3 **      \brief Zoom Toole Implementation File
   4 **
   5 **      $Id: state_zoom.cpp,v 1.1.1.1 2005/01/07 03:34:37 darco Exp $
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002 Robert B. Quattlebaum Jr.
   9 **
  10 **      This software and associated documentation
  11 **      are CONFIDENTIAL and PROPRIETARY property of
  12 **      the above-mentioned copyright holder.
  13 **
  14 **      You may not copy, print, publish, or in any
  15 **      other way distribute this software without
  16 **      a prior written agreement with
  17 **      the copyright holder.
  18 **      \endlegal
  19 */
  20 /* ========================================================================= */
  21
  22 /* === H E A D E R S ======================================================= */
  23
  24 #ifdef USING_PCH
  25 #       include "pch.h"
  26 #else
  27 #ifdef HAVE_CONFIG_H
  28 #       include <config.h>
  29 #endif
  30
  31 #include <sigc++/signal.h>
  32 #include <sigc++/object.h>
  33
  34 #include <ETL/handle>
  35 #include <sinfg/vector.h>
  36
  37
  38 #include "state_zoom.h"
  39 #include "event_mouse.h"
  40 #include "canvasview.h"
  41 #include "workarea.h"
  42 #include "app.h"
  43 #include "dialog_tooloptions.h"
  44 #include "toolbox.h"
  45 #include <sinfgapp/main.h>
  46
  47 #endif
  48
  49 /* === U S I N G =========================================================== */
  50
  51 using namespace std;
  52 using namespace etl;
  53 using namespace sinfg;
  54 using namespace studio;
  55
  56 /* === M A C R O S ========================================================= */
  57
  58 /* === G L O B A L S ======================================================= */
  59 StateZoom studio::state_zoom;
  60
  61 const float ZOOMFACTOR = 1.25f;
  62
  63 /* === C L A S S E S & S T R U C T S ======================================= */
  64
  65 class studio::StateZoom_Context : public sigc::trackable
  66 {
  67         etl::handle<CanvasView> canvas_view_;
  68         CanvasView::IsWorking is_working;
  69
  70         Point p1,p2;
  71
  72         bool prev_workarea_layer_status_;
  73
  74         //Toolbox settings
  75         sinfgapp::Settings& settings;
  76
  77         //Toolbox display
  78         Gtk::Table options_table;
  79
  80 public:
  81
  82         void refresh_tool_options(); //to refresh the toolbox
  83
  84         //events
  85         Smach::event_result event_stop_handler(const Smach::event& x);
  86         Smach::event_result event_refresh_handler(const Smach::event& x);
  87         Smach::event_result event_mouse_click_handler(const Smach::event& x);
  88         Smach::event_result event_refresh_tool_options(const Smach::event& x);
  89
  90         //constructor destructor
  91         StateZoom_Context(CanvasView* canvas_view);
  92         ~StateZoom_Context();
  93
  94         //Canvas interaction
  95         const etl::handle<CanvasView>& get_canvas_view()const{return canvas_view_;}
  96         etl::handle<sinfgapp::CanvasInterface> get_canvas_interface()const{return canvas_view_->canvas_interface();}
  97         sinfg::Canvas::Handle get_canvas()const{return canvas_view_->get_canvas();}
  98         WorkArea * get_work_area()const{return canvas_view_->get_work_area();}
  99
 100         //Modifying settings etc.
 101         void load_settings();
 102         void save_settings();
 103         void reset();
 104
 105         //void zoom(const Point& p1, const Point& p2);
 106
 107 };      // END of class StateGradient_Context
 108
 109 /* === M E T H O D S ======================================================= */
 110
 111 StateZoom::StateZoom():
 112         Smach::state<StateZoom_Context>("zoom")
 113 {
 114         insert(event_def(EVENT_STOP,&StateZoom_Context::event_stop_handler));
 115         insert(event_def(EVENT_REFRESH,&StateZoom_Context::event_refresh_handler));
 116         insert(event_def(EVENT_WORKAREA_MOUSE_BUTTON_DOWN,&StateZoom_Context::event_mouse_click_handler));
 117         //insert(event_def(EVENT_WORKAREA_MOUSE_BUTTON_DRAG,&StateZoom_Context::event_mouse_click_handler));
 118         insert(event_def(EVENT_WORKAREA_BOX,&StateZoom_Context::event_mouse_click_handler));
 119         //insert(event_def(EVENT_WORKAREA_BUTTON_CLICK,&StateZoom_Context::event_mouse_click_handler));
 120         insert(event_def(EVENT_WORKAREA_MOUSE_BUTTON_UP,&StateZoom_Context::event_mouse_click_handler));
 121         insert(event_def(EVENT_REFRESH_TOOL_OPTIONS,&StateZoom_Context::event_refresh_tool_options));
 122 }
 123
 124 StateZoom::~StateZoom()
 125 {
 126 }
 127
 128 void
 129 StateZoom_Context::load_settings()
 130 {
 131         String value;
 132
 133         //parse the arguments yargh!
 134         /*if(settings.get_value("circle.feather",value))
 135                 set_feather(atof(value.c_str()));
 136         else
 137                 set_feather(0);*/
 138 }
 139
 140 void
 141 StateZoom_Context::save_settings()
 142 {
 143         //settings.set_value("circle.fallofftype",strprintf("%d",get_falloff()));
 144 }
 145
 146 void
 147 StateZoom_Context::reset()
 148 {
 149         //refresh_ducks();
 150 }
 151
 152 StateZoom_Context::StateZoom_Context(CanvasView* canvas_view):
 153         canvas_view_(canvas_view),
 154         is_working(*canvas_view),
 155         prev_workarea_layer_status_(get_work_area()->allow_layer_clicks),
 156         settings(sinfgapp::Main::get_selected_input_device()->settings())
 157 {
 158         // Set up the tool options dialog
 159         //options_table.attach(*manage(new Gtk::Label(_("Zoom Tool"))), 0, 2, 0, 1, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 160
 161         load_settings();
 162
 163         options_table.show_all();
 164
 165         refresh_tool_options();
 166         App::dialog_tool_options->present();
 167
 168         // Turn off layer clicking
 169         get_work_area()->allow_layer_clicks=false;
 170
 171         // clear out the ducks
 172         get_work_area()->clear_ducks(); //???
 173
 174         // Refresh the work area
 175         get_work_area()->queue_draw();
 176
 177         // Hide the tables if they are showing
 178         //prev_table_status=get_canvas_view()->tables_are_visible();
 179         //if(prev_table_status)get_canvas_view()->hide_tables();
 180
 181         // Hide the time bar
 182         //get_canvas_view()->hide_timebar();
 183
 184         // Connect a signal
 185         //get_work_area()->signal_user_click().connect(sigc::mem_fun(*this,&studio::StateZoom_Context::on_user_click));
 186         get_canvas_view()->work_area->set_cursor(Gdk::CROSSHAIR);
 187
 188         App::toolbox->refresh();
 189 }
 190
 191 void
 192 StateZoom_Context::refresh_tool_options()
 193 {
 194         App::dialog_tool_options->clear();
 195         App::dialog_tool_options->set_widget(options_table);
 196         App::dialog_tool_options->set_local_name(_("Zoom Tool"));
 197         App::dialog_tool_options->set_name("zoom");
 198 }
 199
 200 Smach::event_result
 201 StateZoom_Context::event_refresh_tool_options(const Smach::event& x)
 202 {
 203         refresh_tool_options();
 204         return Smach::RESULT_ACCEPT;
 205 }
 206
 207 StateZoom_Context::~StateZoom_Context()
 208 {
 209         save_settings();
 210
 211         // Restore layer clicking
 212         get_work_area()->allow_layer_clicks=prev_workarea_layer_status_;
 213         get_canvas_view()->work_area->reset_cursor();
 214
 215         App::dialog_tool_options->clear();
 216
 217         // Show the time bar
 218         if(get_canvas_view()->get_canvas()->rend_desc().get_time_start()!=get_canvas_view()->get_canvas()->rend_desc().get_time_end())
 219                 get_canvas_view()->show_timebar();
 220
 221         // Bring back the tables if they were out before
 222         //if(prev_table_status)get_canvas_view()->show_tables();
 223
 224         // Refresh the work area
 225         get_work_area()->queue_draw();
 226
 227         App::toolbox->refresh();
 228
 229         get_canvas_view()->get_smach().process_event(EVENT_REFRESH_DUCKS);
 230 }
 231
 232 Smach::event_result
 233 StateZoom_Context::event_stop_handler(const Smach::event& x)
 234 {
 235         throw Smach::egress_exception();
 236 }
 237
 238 Smach::event_result
 239 StateZoom_Context::event_refresh_handler(const Smach::event& x)
 240 {
 241         return Smach::RESULT_ACCEPT;
 242 }
 243
 244 Smach::event_result
 245 StateZoom_Context::event_mouse_click_handler(const Smach::event& x)
 246 {
 247         if(x.key==EVENT_WORKAREA_BOX)
 248         {
 249                 const EventBox& event(*reinterpret_cast<const EventBox*>(&x));
 250
 251                 if(event.button==BUTTON_LEFT)
 252                 {
 253                         //respond to event box...
 254
 255
 256                         //Center the new position at the center of the box
 257
 258                         //OH MY GOD HACK - the space is -1* and offset (by the value of the center of the canvas)...
 259                         Point newpos;
 260                         {
 261                                 const Point evcenter = (event.p1+event.p2)/2;
 262                                 const Point realcenter = (get_work_area()->get_window_tl() + get_work_area()->get_window_br())/2;
 263                                 newpos = -(evcenter - realcenter) + get_work_area()->get_focus_point();
 264                         }
 265
 266                         //The zoom will be whatever the required factor to convert current box size to desired box size
 267                         Point tl = get_work_area()->get_window_tl();
 268                         Point br = get_work_area()->get_window_br();
 269
 270                         Vector  span = br - tl;
 271                         Vector  v = event.p2 - event.p1;
 272
 273                         //get the minimum zoom as long as it's greater than 1...
 274                         v[0] = abs(v[0])/abs(span[0]);
 275                         v[1] = abs(v[1])/abs(span[1]);
 276
 277                         float zdiv = max(v[0],v[1]);
 278                         if(zdiv < 1 && zdiv > 0) //must be zoomable
 279                         {
 280                                 get_work_area()->set_focus_point(newpos);
 281                                 get_work_area()->set_zoom(get_work_area()->get_zoom()/zdiv);
 282                         }
 283
 284                         return Smach::RESULT_ACCEPT;
 285                 }
 286         }
 287
 288         if(x.key==EVENT_WORKAREA_MOUSE_BUTTON_UP)
 289         {
 290                 const EventMouse& event(*reinterpret_cast<const EventMouse*>(&x));
 291
 292                 if(event.button==BUTTON_LEFT)
 293                 {
 294                         Point evpos;
 295
 296                         //make the event pos be in the same space...
 297                         //   The weird ass inverted center normalized space...
 298                         {
 299                                 const Point realcenter = (get_work_area()->get_window_tl() + get_work_area()->get_window_br())/2;
 300                                 evpos = -(event.pos - realcenter) + get_work_area()->get_focus_point();
 301                         }
 302
 303                         /*      Zooming:
 304                                 focus point must zoom about the point evpos...
 305
 306                                 trans about an origin not 0:
 307                                 p' = A(p - o) + o
 308                         */
 309
 310                         Vector v = get_work_area()->get_focus_point() - evpos;
 311
 312                         if(event.modifier & Gdk::CONTROL_MASK) //zoom out...
 313                         {
 314                                 v*=ZOOMFACTOR;
 315                                 //get_work_area()->zoom_out();
 316                                 get_work_area()->set_focus_point(evpos + v);
 317                                 get_work_area()->set_zoom(get_work_area()->get_zoom()/ZOOMFACTOR);
 318                         }else //zoom in
 319                         {
 320                                 v/=ZOOMFACTOR;
 321                                 //get_work_area()->zoom_in();
 322                                 get_work_area()->set_focus_point(evpos + v);
 323                                 get_work_area()->set_zoom(get_work_area()->get_zoom()*ZOOMFACTOR);
 324                         }
 325
 326                         return Smach::RESULT_ACCEPT;
 327                 }
 328         }
 329
 330         return Smach::RESULT_OK;
 331 }