/* === S Y N F I G ========================================================= */
/*! \file template.cpp
** \brief LayerFit
**
** $Id$
**
** \legal
** ......... ... 2013 Ivan Mahonin
**
** This package is free software; you can redistribute it and/or
** modify it under the terms of the GNU General Public License as
** published by the Free Software Foundation; either version 2 of
** the License, or (at your option) any later version.
**
** This package is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
** General Public License for more details.
** \endlegal
*/
/* ========================================================================= */
/* === H E A D E R S ======================================================= */
#ifdef USING_PCH
# include "pch.h"
#else
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <synfig/general.h>
#include "layerfit.h"
#include <synfigapp/canvasinterface.h>
#include <synfigapp/localization.h>
#endif
/* === U S I N G =========================================================== */
using namespace std;
using namespace etl;
using namespace synfig;
using namespace synfigapp;
using namespace Action;
/* === M A C R O S ========================================================= */
ACTION_INIT(Action::LayerFit);
ACTION_SET_NAME(Action::LayerFit,"LayerFit");
ACTION_SET_LOCAL_NAME(Action::LayerFit,N_("Fit image"));
ACTION_SET_TASK(Action::LayerFit,"fit");
ACTION_SET_CATEGORY(Action::LayerFit,Action::CATEGORY_LAYER);
ACTION_SET_PRIORITY(Action::LayerFit,0);
ACTION_SET_VERSION(Action::LayerFit,"0.0");
ACTION_SET_CVS_ID(Action::LayerFit,"$Id$");
/* === G L O B A L S ======================================================= */
/* === P R O C E D U R E S ================================================= */
/* === M E T H O D S ======================================================= */
Action::LayerFit::LayerFit()
{
}
Action::ParamVocab
Action::LayerFit::get_param_vocab()
{
ParamVocab ret(Action::CanvasSpecific::get_param_vocab());
ret.push_back(ParamDesc("layer",Param::TYPE_LAYER)
.set_local_name(_("Layer"))
);
return ret;
}
bool
Action::LayerFit::is_candidate(const ParamList &x)
{
if (!candidate_check(get_param_vocab(),x))
return false;
for(ParamList::const_iterator i = x.begin(); i != x.end(); i++) {
if (i->first == "layer") {
if (i->second.get_type() != Param::TYPE_LAYER) return false;
const Layer::Handle layer = i->second.get_layer();
if (layer.empty()
|| layer->get_param("tl").empty()
|| layer->get_param("br").empty())
return false;
}
}
return true;
}
bool
Action::LayerFit::set_param(const synfig::String& name, const Action::Param ¶m)
{
if(name=="layer" && param.get_type()==Param::TYPE_LAYER)
{
layer=param.get_layer();
return true;
}
return Action::CanvasSpecific::set_param(name,param);
}
bool
Action::LayerFit::is_ready()const
{
if(!layer)
return false;
return Action::CanvasSpecific::is_ready();
}
void
Action::LayerFit::perform()
{
Canvas::Handle subcanvas(layer->get_canvas());
// Find the iterator for the layer
Canvas::iterator iter=find(subcanvas->begin(),subcanvas->end(),layer);
// If we couldn't find the layer in the canvas, then bail
if(*iter!=layer)
throw Error(_("This layer doesn't exist anymore."));
if (layer->dynamic_param_list().count("tl") > 0
|| layer->dynamic_param_list().count("br") > 0)
throw Error(_("You cannot fit animated layers"));
// remember values
prev_tl = layer->get_param("tl");
prev_br = layer->get_param("br");
set_dirty();
// new coordinates
Vector size = get_canvas()->rend_desc().get_br()-get_canvas()->rend_desc().get_tl();
ValueBase new_tl(Point(size*(-0.5f)));
ValueBase new_br(Point(size*0.5f));
// recalculate coordinates to keep proportions
int w = layer->get_param("_width").get(int());
int h = layer->get_param("_height").get(int());
if(w > 0 && h > 0)
{
Vector x;
if(abs(size[0])<abs(size[1])) // if canvas is tall and thin
{
x[0]=size[0]; // use full width
x[1]=size[0]/w*h; // and scale for height
if((size[0]<0) ^ (size[1]<0))
x[1]=-x[1];
}
else // else canvas is short and fat (or maybe square)
{
x[1]=size[1]; // use full height
x[0]=size[1]/h*w; // and scale for width
if((size[0]<0) ^ (size[1]<0))
x[0]=-x[0];
}
new_tl = -x/2;
new_br = x/2;
}
layer->set_param("tl", new_tl);
layer->set_param("br", new_br);
layer->changed();
if(get_canvas_interface())
{
get_canvas_interface()->signal_layer_param_changed()(layer, "tl");
get_canvas_interface()->signal_layer_param_changed()(layer, "br");
}
else synfig::warning("CanvasInterface not set on action");
}
void
Action::LayerFit::undo()
{
set_dirty();
// restore the old state
layer->set_param("tl", prev_tl);
layer->set_param("br", prev_br);
layer->changed();
if(get_canvas_interface())
{
get_canvas_interface()->signal_layer_param_changed()(layer, "tl");
get_canvas_interface()->signal_layer_param_changed()(layer, "br");
}
else synfig::warning("CanvasInterface not set on action");
}
/* === E N T R Y P O I N T ================================================= */