synfig-studio/trunk/src/synfigapp/actions/blinepointtangentmerge.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file blinepointtangentmerge.cpp
   3 **      \brief Template 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 "blinepointtangentmerge.h"
  33 #include "valuedescset.h"
  34
  35 #include "activepointset.h"
  36 #include "activepointadd.h"
  37
  38 #include "valuedescconnect.h"
  39 #include <synfigapp/canvasinterface.h>
  40
  41 #endif
  42
  43 using namespace std;
  44 using namespace etl;
  45 using namespace synfig;
  46 using namespace synfigapp;
  47 using namespace Action;
  48
  49 /* === M A C R O S ========================================================= */
  50
  51 ACTION_INIT(Action::BLinePointTangentMerge);
  52 ACTION_SET_NAME(Action::BLinePointTangentMerge,"bline_point_tangent_merge");
  53 ACTION_SET_LOCAL_NAME(Action::BLinePointTangentMerge,_("Merge Tangents"));
  54 ACTION_SET_TASK(Action::BLinePointTangentMerge,"merge");
  55 ACTION_SET_CATEGORY(Action::BLinePointTangentMerge,Action::CATEGORY_VALUENODE);
  56 ACTION_SET_PRIORITY(Action::BLinePointTangentMerge,0);
  57 ACTION_SET_VERSION(Action::BLinePointTangentMerge,"0.0");
  58 ACTION_SET_CVS_ID(Action::BLinePointTangentMerge,"$Id$");
  59
  60 /* === G L O B A L S ======================================================= */
  61
  62 /* === P R O C E D U R E S ================================================= */
  63
  64 /* === M E T H O D S ======================================================= */
  65
  66 Action::BLinePointTangentMerge::BLinePointTangentMerge()
  67 {
  68         time=(Time::begin()-1);
  69         set_dirty(true);
  70 }
  71
  72 Action::ParamVocab
  73 Action::BLinePointTangentMerge::get_param_vocab()
  74 {
  75         ParamVocab ret(Action::CanvasSpecific::get_param_vocab());
  76
  77         ret.push_back(ParamDesc("value_node",Param::TYPE_VALUENODE)
  78                 .set_local_name(_("ValueNode of BLinePoint"))
  79         );
  80
  81         ret.push_back(ParamDesc("time",Param::TYPE_TIME)
  82                 .set_local_name(_("Time"))
  83         );
  84
  85         return ret;
  86 }
  87
  88 bool
  89 Action::BLinePointTangentMerge::is_candidate(const ParamList &x)
  90 {
  91         if(candidate_check(get_param_vocab(),x))
  92         {
  93                 ValueNode_Composite::Handle value_node;
  94                 value_node=ValueNode_Composite::Handle::cast_dynamic(x.find("value_node")->second.get_value_node());
  95                 if(!value_node || value_node->get_type()!=ValueBase::TYPE_BLINEPOINT)
  96                         return false;
  97                 synfig::Time time(x.find("time")->second.get_time());
  98                 if((*value_node->get_link("split"))(time).get(bool())==false)
  99                         return false;
 100                 return true;
 101         }
 102         return false;
 103 }
 104
 105 bool
 106 Action::BLinePointTangentMerge::set_param(const synfig::String& name, const Action::Param &param)
 107 {
 108         if(name=="value_node" && param.get_type()==Param::TYPE_VALUENODE)
 109         {
 110                 value_node=value_node.cast_dynamic(param.get_value_node());
 111
 112                 return (bool)(value_node);
 113         }
 114         if(name=="time" && param.get_type()==Param::TYPE_TIME)
 115         {
 116                 time=param.get_time();
 117
 118                 return true;
 119         }
 120
 121         return Action::CanvasSpecific::set_param(name,param);
 122 }
 123
 124 bool
 125 Action::BLinePointTangentMerge::is_ready()const
 126 {
 127         if(!value_node)
 128                 synfig::error("Missing or bad value_node");
 129
 130         if(time==(Time::begin()-1))
 131                 synfig::error("Missing time");
 132
 133         if(!value_node || time==(Time::begin()-1))
 134                 return false;
 135         return Action::CanvasSpecific::is_ready();
 136 }
 137
 138 void
 139 Action::BLinePointTangentMerge::prepare()
 140 {
 141         clear();
 142
 143         Action::Handle action;
 144
 145         {
 146                 action=Action::create("value_desc_set");
 147                 if(!action)
 148                         throw Error(_("Couldn't find action \"value_desc_set\""));
 149
 150                 action->set_param("canvas",get_canvas());
 151                 action->set_param("canvas_interface",get_canvas_interface());
 152                 action->set_param("value_desc",ValueDesc(value_node,3));
 153                 action->set_param("time",time);
 154                 action->set_param("new_value",synfig::ValueBase(false));
 155
 156                 assert(action->is_ready());
 157                 if(!action->is_ready())
 158                         throw Error(Error::TYPE_NOTREADY);
 159
 160                 add_action(action);
 161         }
 162
 163         // the merged tangent should be the average of the 2 tangents we're merging
 164         ValueBase average(((Vector)((*value_node->get_link("t1"))(time)) +
 165                                            (Vector)((*value_node->get_link("t2"))(time))) / 2);
 166
 167         {
 168                 // set tangent1
 169                 action=Action::create("value_desc_set");
 170                 if(!action)
 171                         throw Error(_("Couldn't find action \"value_desc_set\""));
 172
 173                 action->set_param("canvas",get_canvas());
 174                 action->set_param("canvas_interface",get_canvas_interface());
 175                 action->set_param("value_desc",ValueDesc(value_node,4));
 176                 action->set_param("time",time);
 177                 action->set_param("new_value",average);
 178
 179                 assert(action->is_ready());
 180                 if(!action->is_ready())
 181                         throw Error(Error::TYPE_NOTREADY);
 182
 183                 add_action(action);
 184         }
 185
 186         {
 187                 // set tangent2
 188                 action=Action::create("value_desc_set");
 189                 if(!action)
 190                         throw Error(_("Couldn't find action \"value_desc_set\""));
 191
 192                 action->set_param("canvas",get_canvas());
 193                 action->set_param("canvas_interface",get_canvas_interface());
 194                 action->set_param("value_desc",ValueDesc(value_node,5));
 195                 action->set_param("time",time);
 196                 action->set_param("new_value",average);
 197
 198                 assert(action->is_ready());
 199                 if(!action->is_ready())
 200                         throw Error(Error::TYPE_NOTREADY);
 201
 202                 add_action(action);
 203         }
 204 }