/** 
 * @file llscrollingpanelparam.cpp
 * @brief UI panel for a list of visual param panels
 *
 * $LicenseInfo:firstyear=2009&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"

#include "llscrollingpanelparambase.h"
#include "llviewerjointmesh.h"
#include "llviewervisualparam.h"
#include "llwearable.h"
#include "llviewervisualparam.h"
#include "lltoolmorph.h"
#include "lltrans.h"
#include "llbutton.h"
#include "llsliderctrl.h"
#include "llagent.h"
#include "llviewborder.h"
#include "llvoavatarself.h"

LLScrollingPanelParamBase::LLScrollingPanelParamBase( const LLPanel::Params& panel_params,
						      LLViewerJointMesh* mesh, LLViewerVisualParam* param, BOOL allow_modify, LLWearable* wearable, LLJoint* jointp, BOOL use_hints)
	: LLScrollingPanel( panel_params ),
	  mParam(param),
	  mSlider(nullptr),
	  mAllowModify(allow_modify),
	  mWearable(wearable)
{
	if (use_hints)
		buildFromFile( "panel_scrolling_param.xml");
	else
		buildFromFile( "panel_scrolling_param_base.xml");

	mSlider = getChild<LLSliderCtrl>("param slider");
	mSlider->setMaxValue(100.f * (mParam->getMaxWeight() - mParam->getMinWeight()));
	mSlider->setValue(weightToSlider(param->getWeight()));

	std::string display_name = LLTrans::getString(param->getDisplayName());
	mSlider->setLabelArg("[DESC]", display_name);
	mSlider->setEnabled(mAllowModify);
	mSlider->setCommitCallback(boost::bind(LLScrollingPanelParamBase::onSliderMoved, mSlider, this));

	setVisible(FALSE);
	setBorderVisible( FALSE );
}

LLScrollingPanelParamBase::~LLScrollingPanelParamBase()
{
}

void LLScrollingPanelParamBase::updatePanel(BOOL allow_modify)
{
	LLViewerVisualParam* param = mParam;

	if (!mWearable)
	{
		// not editing a wearable just now, no update necessary
		return;
	}

	F32 current_weight = mWearable->getVisualParamWeight( param->getID() );
	mSlider->setValue(weightToSlider( current_weight ) );
	mAllowModify = allow_modify;
	mSlider->setEnabled(mAllowModify);
}

// static
void LLScrollingPanelParamBase::onSliderMoved(LLUICtrl* ctrl, void* userdata)
{
	LLSliderCtrl* slider = (LLSliderCtrl*) ctrl;
	LLScrollingPanelParamBase* self = (LLScrollingPanelParamBase*) userdata;
	LLViewerVisualParam* param = self->mParam;
	
	F32 current_weight = self->mWearable->getVisualParamWeight( param->getID() );
	F32 new_weight = self->sliderToWeight( (F32)slider->getValue().asReal() );
	if (current_weight != new_weight )
	{
		self->mWearable->setVisualParamWeight( param->getID(), new_weight);
		self->mWearable->writeToAvatar(gAgentAvatarp);
		gAgentAvatarp->updateVisualParams();
	}
}

F32 LLScrollingPanelParamBase::weightToSlider(F32 weight)
{
	return (weight - mParam->getMinWeight()) * 100.f;
}

F32 LLScrollingPanelParamBase::sliderToWeight(F32 slider)
{
	return slider / 100.f + mParam->getMinWeight();
}