text: /** 
   * @file llpanelvolumepulldown.cpp
   * @author Tofu Linden
   * @brief A floater showing the master volume pull-down
   *
   * $LicenseInfo:firstyear=2008&license=viewerlgpl$
   * 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 "llpanelvolumepulldown.h"
  
  // Viewer libs
  #include "llviewercontrol.h"
  #include "llstatusbar.h"
  
  // Linden libs
  #include "llbutton.h"
  #include "lltabcontainer.h"
  #include "llfloaterreg.h"
  #include "llfloaterpreference.h"
  #include "llsliderctrl.h"
  
  #include "llcheckboxctrl.h"
  #include "llviewercontrol.h"
  
  /* static */ const F32 LLPanelVolumePulldown::sAutoCloseFadeStartTimeSec = 4.0f;
  /* static */ const F32 LLPanelVolumePulldown::sAutoCloseTotalTimeSec = 5.0f;
  
  ///----------------------------------------------------------------------------
  /// Class LLPanelVolumePulldown
  ///----------------------------------------------------------------------------
  
  // Default constructor
  LLPanelVolumePulldown::LLPanelVolumePulldown()
  {
  	mHoverTimer.stop();
  
  	/*//<FS:KC> Handled centrally now
      mCommitCallbackRegistrar.add("Vol.setControlFalse", boost::bind(&LLPanelVolumePulldown::setControlFalse, this, _2));
  	mCommitCallbackRegistrar.add("Vol.GoAudioPrefs", boost::bind(&LLPanelVolumePulldown::onAdvancedButtonClick, this, _2));
  	// <FS:Ansariel> Missing callback function
  	mCommitCallbackRegistrar.add("Vol.SetSounds", boost::bind(&LLPanelVolumePulldown::setSounds, this));
  	*/
  
  	buildFromFile( "panel_volume_pulldown.xml");
  }
  
  BOOL LLPanelVolumePulldown::postBuild()
  {
  	// set the initial volume-slider's position to reflect reality
  	// <FS:Ansariel> Was renamed to "System Volume"
  	//LLSliderCtrl* volslider =  getChild<LLSliderCtrl>( "mastervolume" );
  	LLSliderCtrl* volslider =  getChild<LLSliderCtrl>( "System Volume" );
  	volslider->setValue(gSavedSettings.getF32("AudioLevelMaster"));
  
  	return LLPanel::postBuild();
  }
  
  /*virtual*/
  void LLPanelVolumePulldown::onMouseEnter(S32 x, S32 y, MASK mask)
  {
  	mHoverTimer.stop();
  	LLPanel::onMouseEnter(x,y,mask);
  }
  
  /*virtual*/
  void LLPanelVolumePulldown::onTopLost()
  {
  	setVisible(FALSE);
  }
  
  /*virtual*/
  void LLPanelVolumePulldown::onMouseLeave(S32 x, S32 y, MASK mask)
  {
  	mHoverTimer.start();
  	LLPanel::onMouseLeave(x,y,mask);
  }
  
  /*virtual*/ 
  void LLPanelVolumePulldown::onVisibilityChange ( BOOL new_visibility )
  {
  	if (new_visibility)	
  	{
  		mHoverTimer.start(); // timer will be stopped when mouse hovers over panel
  	}
  	else
  	{
  		mHoverTimer.stop();
  
  	}
  }
  
  //<FS:KC> Handled centrally now
  /*
  void LLPanelVolumePulldown::onAdvancedButtonClick(const LLSD& user_data)
  {
  	// close the global volume minicontrol, we're bringing up the big one
  	setVisible(FALSE);
  
  	// bring up the prefs floater
  	LLFloaterPreference* prefsfloater = dynamic_cast<LLFloaterPreference*>
  		(LLFloaterReg::showInstance("preferences"));
  	if (prefsfloater)
  	{
  		// grab the 'audio' panel from the preferences floater and
  		// bring it the front!
  		LLTabContainer* tabcontainer = prefsfloater->getChild<LLTabContainer>("pref core");
  		LLPanel* audiopanel = prefsfloater->getChild<LLPanel>("audio");
  		if (tabcontainer && audiopanel)
  		{
  			tabcontainer->selectTabPanel(audiopanel);
  		}
  	}
  }
  
  void LLPanelVolumePulldown::setControlFalse(const LLSD& user_data)
  {
  	std::string control_name = user_data.asString();
  	LLControlVariable* control = findControl(control_name);
  	
  	if (control)
  		control->set(LLSD(FALSE));
  }
  */
  
  //virtual
  void LLPanelVolumePulldown::draw()
  {
  	F32 alpha = mHoverTimer.getStarted() 
  		? clamp_rescale(mHoverTimer.getElapsedTimeF32(), sAutoCloseFadeStartTimeSec, sAutoCloseTotalTimeSec, 1.f, 0.f)
  		: 1.0f;
  	LLViewDrawContext context(alpha);
  
  	LLPanel::draw();
  
  	if (alpha == 0.f)
  	{
  		setVisible(FALSE);
  	}
  }
  
  //<FS:KC> Handled centrally now
  /*
  // <FS:Ansariel> Missing callback function
  void LLPanelVolumePulldown::setSounds()
  {
  	// Disable Enable gesture/collisions sounds checkbox if the master sound is disabled
  	// or if sound effects are disabled.
  	getChild<LLCheckBoxCtrl>("gesture_audio_play_btn")->setEnabled(!gSavedSettings.getBOOL("MuteSounds"));
  	getChild<LLCheckBoxCtrl>("collisions_audio_play_btn")->setEnabled(!gSavedSettings.getBOOL("MuteSounds"));
  }
  // </FS:Ansariel> Missing callback function
  */
  