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

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file state_zoom.cpp
   3 **      \brief Zoom Toole 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 #endif
  49
  50 /* === U S I N G =========================================================== */
  51
  52 using namespace std;
  53 using namespace etl;
  54 using namespace synfig;
  55 using namespace studio;
  56
  57 /* === M A C R O S ========================================================= */
  58
  59 /* === G L O B A L S ======================================================= */
  60 StateZoom studio::state_zoom;
  61
  62 const float ZOOMFACTOR = 1.25f;
  63
  64 /* === C L A S S E S & S T R U C T S ======================================= */
  65
  66 class studio::StateZoom_Context : public sigc::trackable
  67 {
  68         etl::handle<CanvasView> canvas_view_;
  69         CanvasView::IsWorking is_working;
  70
  71         Point p1,p2;
  72
  73         bool prev_workarea_layer_status_;
  74
  75         //Toolbox settings
  76         synfigapp::Settings& settings;
  77
  78         //Toolbox display
  79         Gtk::Table options_table;
  80
  81 public:
  82
  83         void refresh_tool_options(); //to refresh the toolbox
  84
  85         //events
  86         Smach::event_result event_stop_handler(const Smach::event& x);
  87         Smach::event_result event_refresh_handler(const Smach::event& x);
  88         Smach::event_result event_mouse_click_handler(const Smach::event& x);
  89         Smach::event_result event_refresh_tool_options(const Smach::event& x);
  90
  91         //constructor destructor
  92         StateZoom_Context(CanvasView* canvas_view);
  93         ~StateZoom_Context();
  94
  95         //Canvas interaction
  96         const etl::handle<CanvasView>& get_canvas_view()const{return canvas_view_;}
  97         etl::handle<synfigapp::CanvasInterface> get_canvas_interface()const{return canvas_view_->canvas_interface();}
  98         synfig::Canvas::Handle get_canvas()const{return canvas_view_->get_canvas();}
  99         WorkArea * get_work_area()const{return canvas_view_->get_work_area();}
 100
 101         //Modifying settings etc.
 102         void load_settings();
 103         void save_settings();
 104         void reset();
 105
 106         //void zoom(const Point& p1, const Point& p2);
 107
 108 };      // END of class StateGradient_Context
 109
 110 /* === M E T H O D S ======================================================= */
 111
 112 StateZoom::StateZoom():
 113         Smach::state<StateZoom_Context>("zoom")
 114 {
 115         insert(event_def(EVENT_STOP,&StateZoom_Context::event_stop_handler));
 116         insert(event_def(EVENT_REFRESH,&StateZoom_Context::event_refresh_handler));
 117         insert(event_def(EVENT_WORKAREA_MOUSE_BUTTON_DOWN,&StateZoom_Context::event_mouse_click_handler));
 118         //insert(event_def(EVENT_WORKAREA_MOUSE_BUTTON_DRAG,&StateZoom_Context::event_mouse_click_handler));
 119         insert(event_def(EVENT_WORKAREA_BOX,&StateZoom_Context::event_mouse_click_handler));
 120         //insert(event_def(EVENT_WORKAREA_BUTTON_CLICK,&StateZoom_Context::event_mouse_click_handler));
 121         insert(event_def(EVENT_WORKAREA_MOUSE_BUTTON_UP,&StateZoom_Context::event_mouse_click_handler));
 122         insert(event_def(EVENT_REFRESH_TOOL_OPTIONS,&StateZoom_Context::event_refresh_tool_options));
 123 }
 124
 125 StateZoom::~StateZoom()
 126 {
 127 }
 128
 129 void
 130 StateZoom_Context::load_settings()
 131 {
 132         String value;
 133
 134         //parse the arguments yargh!
 135         /*if(settings.get_value("circle.feather",value))
 136                 set_feather(atof(value.c_str()));
 137         else
 138                 set_feather(0);*/
 139 }
 140
 141 void
 142 StateZoom_Context::save_settings()
 143 {
 144         //settings.set_value("circle.fallofftype",strprintf("%d",get_falloff()));
 145 }
 146
 147 void
 148 StateZoom_Context::reset()
 149 {
 150         //refresh_ducks();
 151 }
 152
 153 StateZoom_Context::StateZoom_Context(CanvasView* canvas_view):
 154         canvas_view_(canvas_view),
 155         is_working(*canvas_view),
 156         prev_workarea_layer_status_(get_work_area()->get_allow_layer_clicks()),
 157         settings(synfigapp::Main::get_selected_input_device()->settings())
 158 {
 159         // Set up the tool options dialog
 160         //options_table.attach(*manage(new Gtk::Label(_("Zoom Tool"))), 0, 2, 0, 1, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 161
 162         load_settings();
 163
 164         options_table.show_all();
 165
 166         refresh_tool_options();
 167         App::dialog_tool_options->present();
 168
 169         // Turn off layer clicking
 170         get_work_area()->set_allow_layer_clicks(false);
 171
 172         // clear out the ducks
 173         get_work_area()->clear_ducks(); //???
 174
 175         // Refresh the work area
 176         get_work_area()->queue_draw();
 177
 178         // Hide the tables if they are showing
 179         //prev_table_status=get_canvas_view()->tables_are_visible();
 180         //if(prev_table_status)get_canvas_view()->hide_tables();
 181
 182         // Disable the time bar
 183         //get_canvas_view()->set_sensitive_timebar(false);
 184
 185         // Connect a signal
 186         //get_work_area()->signal_user_click().connect(sigc::mem_fun(*this,&studio::StateZoom_Context::on_user_click));
 187         get_canvas_view()->work_area->set_cursor(Gdk::CROSSHAIR);
 188
 189         App::toolbox->refresh();
 190 }
 191
 192 void
 193 StateZoom_Context::refresh_tool_options()
 194 {
 195         App::dialog_tool_options->clear();
 196         App::dialog_tool_options->set_widget(options_table);
 197         App::dialog_tool_options->set_local_name(_("Zoom Tool"));
 198         App::dialog_tool_options->set_name("zoom");
 199 }
 200
 201 Smach::event_result
 202 StateZoom_Context::event_refresh_tool_options(const Smach::event& /*x*/)
 203 {
 204         refresh_tool_options();
 205         return Smach::RESULT_ACCEPT;
 206 }
 207
 208 StateZoom_Context::~StateZoom_Context()
 209 {
 210         save_settings();
 211
 212         // Restore layer clicking
 213         get_work_area()->set_allow_layer_clicks(prev_workarea_layer_status_);
 214         get_canvas_view()->work_area->reset_cursor();
 215
 216         App::dialog_tool_options->clear();
 217
 218         // Enable the time bar
 219         //get_canvas_view()->set_sensitive_timebar(true);
 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 }