+
+DuckDrag_Combo::DuckDrag_Combo():
+ scale(false),
+ rotate(false),
+ constrain(false) // Lock aspect for scale; smooth move for translate
+{
+}
+
+void
+DuckDrag_Combo::begin_duck_drag(Duckmatic* duckmatic, const synfig::Vector& offset)
+{
+ last_move=Vector(1,1);
+
+ const DuckList selected_ducks(duckmatic->get_selected_ducks());
+ DuckList::const_iterator iter;
+
+ bad_drag=false;
+
+ drag_offset=duckmatic->find_duck(offset)->get_trans_point();
+
+ //snap=drag_offset-duckmatic->snap_point_to_grid(drag_offset);
+ //snap=offset-drag_offset_;
+ snap=Vector(0,0);
+
+ // Calculate center
+ Point vmin(100000000,100000000);
+ Point vmax(-100000000,-100000000);
+ //std::set<etl::handle<Duck> >::iterator iter;
+ positions.clear();
+ int i;
+ for(i=0,iter=selected_ducks.begin();iter!=selected_ducks.end();++iter,i++)
+ {
+ Point p((*iter)->get_trans_point());
+ vmin[0]=min(vmin[0],p[0]);
+ vmin[1]=min(vmin[1],p[1]);
+ vmax[0]=max(vmax[0],p[0]);
+ vmax[1]=max(vmax[1],p[1]);
+ positions.push_back(p);
+ }
+ center=(vmin+vmax)*0.5;
+ if((vmin-vmax).mag()<=EPSILON)
+ move_only=true;
+ else
+ move_only=false;
+
+
+ synfig::Vector vect(offset-center);
+ original_angle=Angle::tan(vect[1],vect[0]);
+ original_mag=vect.mag();
+}
+
+
+void
+DuckDrag_Combo::duck_drag(Duckmatic* duckmatic, const synfig::Vector& vector)
+{
+ if (!duckmatic) return;
+
+ if(bad_drag)
+ return;
+
+ //std::set<etl::handle<Duck> >::iterator iter;
+ synfig::Vector vect;
+ if (move_only || (!scale && !rotate))
+ vect= duckmatic->snap_point_to_grid(vector)-drag_offset+snap;
+ else
+ vect= duckmatic->snap_point_to_grid(vector)-center+snap;
+
+ last_move=vect;
+
+ const DuckList selected_ducks(duckmatic->get_selected_ducks());
+ DuckList::const_iterator iter;
+
+ Time time(duckmatic->get_time());
+
+ int i;
+ if( move_only || (!scale && !rotate) )
+ {
+ for(i=0,iter=selected_ducks.begin();iter!=selected_ducks.end();++iter,i++)
+ {
+ if((*iter)->get_type()==Duck::TYPE_VERTEX || (*iter)->get_type()==Duck::TYPE_POSITION)
+ (*iter)->set_trans_point(positions[i]+vect, time);
+ }
+ for(i=0,iter=selected_ducks.begin();iter!=selected_ducks.end();++iter,i++)
+ {
+ if((*iter)->get_type()!=Duck::TYPE_VERTEX&&(*iter)->get_type()!=Duck::TYPE_POSITION)
+ (*iter)->set_trans_point(positions[i]+vect, time);
+ }
+ DuckList duck_list(duckmatic->get_duck_list());
+ for (iter=duck_list.begin(); iter!=duck_list.end(); ++iter)
+ {
+ if ((*iter)->get_type() == Duck::TYPE_TANGENT || (*iter)->get_type() == Duck::TYPE_WIDTH)
+ {
+ (*iter)->update(time);
+ }
+ }
+ return;
+ }
+
+ if (rotate)
+ {
+ Angle::tan angle(vect[1],vect[0]);
+ angle=original_angle-angle;
+ Real mag(vect.mag()/original_mag);
+ Real sine(Angle::sin(angle).get());
+ Real cosine(Angle::cos(angle).get());
+
+ for(i=0,iter=selected_ducks.begin();iter!=selected_ducks.end();++iter,i++)
+ {
+ if((*iter)->get_type()!=Duck::TYPE_VERTEX&&(*iter)->get_type()!=Duck::TYPE_POSITION)continue;
+
+ Vector x(positions[i]-center),p;
+
+ p[0]=cosine*x[0]+sine*x[1];
+ p[1]=-sine*x[0]+cosine*x[1];
+ if(scale)p*=mag;
+ p+=center;
+ (*iter)->set_trans_point(p, time);
+ }
+ for(i=0,iter=selected_ducks.begin();iter!=selected_ducks.end();++iter,i++)
+ {
+ if(!((*iter)->get_type()!=Duck::TYPE_VERTEX&&(*iter)->get_type()!=Duck::TYPE_POSITION))continue;
+
+ Vector x(positions[i]-center),p;
+
+ p[0]=cosine*x[0]+sine*x[1];
+ p[1]=-sine*x[0]+cosine*x[1];
+ if(scale)p*=mag;
+ p+=center;
+ (*iter)->set_trans_point(p, time);
+ }
+ } else if (scale)
+ {
+ if(!constrain)
+ {
+ if(abs(drag_offset[0]-center[0])>EPSILON)
+ vect[0]/=drag_offset[0]-center[0];
+ else
+ vect[0]=1;
+ if(abs(drag_offset[1]-center[1])>EPSILON)
+ vect[1]/=drag_offset[1]-center[1];
+ else
+ vect[1]=1;
+ }
+ else
+ {
+ //vect[0]=vect[1]=vect.mag()*0.707106781;
+ Real amount(vect.mag()/(drag_offset-center).mag());
+ vect[0]=vect[1]=amount;
+ }
+
+ if(vect[0]<EPSILON && vect[0]>-EPSILON)
+ vect[0]=1;
+ if(vect[1]<EPSILON && vect[1]>-EPSILON)
+ vect[1]=1;
+
+ for(i=0,iter=selected_ducks.begin();iter!=selected_ducks.end();++iter,i++)
+ {
+ if(((*iter)->get_type()!=Duck::TYPE_VERTEX&&(*iter)->get_type()!=Duck::TYPE_POSITION))continue;
+
+ Vector p(positions[i]-center);
+
+ p[0]*=vect[0];
+ p[1]*=vect[1];
+ p+=center;
+ (*iter)->set_trans_point(p, time);
+ }
+ for(i=0,iter=selected_ducks.begin();iter!=selected_ducks.end();++iter,i++)
+ {
+ if(!((*iter)->get_type()!=Duck::TYPE_VERTEX&&(*iter)->get_type()!=Duck::TYPE_POSITION))continue;
+
+ Vector p(positions[i]-center);
+
+ p[0]*=vect[0];
+ p[1]*=vect[1];
+ p+=center;
+ (*iter)->set_trans_point(p, time);
+ }
+ }
+ last_move=vect;
+}
+
+bool
+DuckDrag_Combo::end_duck_drag(Duckmatic* duckmatic)
+{
+ if(bad_drag)return false;
+
+ //synfigapp::Action::PassiveGrouper group(get_canvas_interface()->get_instance().get(),_("Rotate Ducks"));
+
+ if((last_move-Vector(1,1)).mag()>0.0001)
+ {
+ duckmatic->signal_edited_selected_ducks();
+ return true;
+ }
+ else
+ {
+ duckmatic->signal_user_click_selected_ducks(0);
+ return false;
+ }
+}