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lltoast.cpp：源码内容
							/** 
 * @file lltoast.cpp
 * @brief This class implements a placeholder for any notification panel.
 *
 * $LicenseInfo:firstyear=2000&license=viewergpl$
 * 
 * Copyright (c) 2000-2010, Linden Research, Inc.
 * 
 * Second Life Viewer Source Code
 * The source code in this file ("Source Code") is provided by Linden Lab
 * to you under the terms of the GNU General Public License, version 2.0
 * ("GPL"), unless you have obtained a separate licensing agreement
 * ("Other License"), formally executed by you and Linden Lab.  Terms of
 * the GPL can be found in doc/GPL-license.txt in this distribution, or
 * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
 * 
 * There are special exceptions to the terms and conditions of the GPL as
 * it is applied to this Source Code. View the full text of the exception
 * in the file doc/FLOSS-exception.txt in this software distribution, or
 * online at
 * http://secondlifegrid.net/programs/open_source/licensing/flossexception
 * 
 * By copying, modifying or distributing this software, you acknowledge
 * that you have read and understood your obligations described above,
 * and agree to abide by those obligations.
 * 
 * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
 * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
 * COMPLETENESS OR PERFORMANCE.
 * $/LicenseInfo$
 */
#include "llviewerprecompiledheaders.h" // must be first include
#include "lltoast.h"
#include "llbutton.h"
#include "llfocusmgr.h"
#include "llnotifications.h"
#include "llviewercontrol.h"
using namespace LLNotificationsUI;
//--------------------------------------------------------------------------
LLToast::Params::Params() 
:	can_fade("can_fade", true),
	can_be_stored("can_be_stored", true),
	is_modal("is_modal", false),
	is_tip("is_tip", false),
	enable_hide_btn("enable_hide_btn", true),
	force_show("force_show", false),
	force_store("force_store", false),
	fading_time_secs("fading_time_secs", gSavedSettings.getS32("ToastFadingTime")),
	lifetime_secs("lifetime_secs", gSavedSettings.getS32("NotificationToastLifeTime"))
{};
LLToast::LLToast(const LLToast::Params& p) 
:	LLModalDialog(LLSD(), p.is_modal),
	mPanel(p.panel), 
	mToastLifetime(p.lifetime_secs),
	mToastFadingTime(p.fading_time_secs),
	mNotificationID(p.notif_id),  
	mSessionID(p.session_id),
	mCanFade(p.can_fade),
	mCanBeStored(p.can_be_stored),
	mHideBtnEnabled(p.enable_hide_btn),
	mHideBtn(NULL),
	mNotification(p.notification),
	mIsHidden(false),
	mHideBtnPressed(false),
	mIsTip(p.is_tip),
	mWrapperPanel(NULL)
{
	LLUICtrlFactory::getInstance()->buildFloater(this, "panel_toast.xml", NULL);
	setCanDrag(FALSE);
	mWrapperPanel = getChild<LLPanel>("wrapper_panel");
	mWrapperPanel->setMouseEnterCallback(boost::bind(&LLToast::onToastMouseEnter, this));
	mWrapperPanel->setMouseLeaveCallback(boost::bind(&LLToast::onToastMouseLeave, this));
	if(mPanel)
	{
		insertPanel(mPanel);
	}
	if(mHideBtnEnabled)
	{
		mHideBtn = getChild<LLButton>("hide_btn");
		mHideBtn->setClickedCallback(boost::bind(&LLToast::hide,this));
		mHideBtn->setMouseEnterCallback(boost::bind(&LLToast::onToastMouseEnter, this));
		mHideBtn->setMouseLeaveCallback(boost::bind(&LLToast::onToastMouseLeave, this));
	}
	// init callbacks if present
	if(!p.on_delete_toast().empty())
		mOnDeleteToastSignal.connect(p.on_delete_toast());
	if(!p.on_mouse_enter().empty())
		mOnMouseEnterSignal.connect(p.on_mouse_enter());
}
//--------------------------------------------------------------------------
BOOL LLToast::postBuild()
{
	if(!mCanFade)
	{
		mTimer.stop();
	}
	if (mIsTip)
	{
		mTextEditor = mPanel->getChild<LLTextEditor>("text_editor_box");
		if (mTextEditor)
		{
			mTextEditor->setMouseUpCallback(boost::bind(&LLToast::hide,this));
			mPanel->setMouseUpCallback(boost::bind(&LLToast::handleTipToastClick, this, _2, _3, _4));
		}
	}
	return TRUE;
}
//--------------------------------------------------------------------------
void LLToast::handleTipToastClick(S32 x, S32 y, MASK mask)
{
	if (!mTextEditor->getRect().pointInRect(x, y))
	{
		hide();
	}
}
//--------------------------------------------------------------------------
void LLToast::setHideButtonEnabled(bool enabled)
{
	if(mHideBtn)
		mHideBtn->setEnabled(enabled);
}
//--------------------------------------------------------------------------
LLToast::~LLToast()
{	
	mOnToastDestroyedSignal(this);
}
//--------------------------------------------------------------------------
void LLToast::setAndStartTimer(F32 period)
{
	if(mCanFade)
	{
		mToastLifetime = period;
		mTimer.start();
	}
}
//--------------------------------------------------------------------------
bool LLToast::lifetimeHasExpired()
{
	if (mTimer.getStarted())
	{
		F32 elapsed_time = mTimer.getElapsedTimeF32();
		if ((mToastLifetime - elapsed_time) <= mToastFadingTime) 
		{
			setBackgroundOpaque(FALSE);
		}
		if (elapsed_time > mToastLifetime) 
		{
			return true;
		}
	}
	return false;
}
//--------------------------------------------------------------------------
void LLToast::hide()
{
	setVisible(FALSE);
	mTimer.stop();
	mIsHidden = true;
	mOnFadeSignal(this); 
}
void LLToast::onFocusLost()
{
	if(mWrapperPanel && !isBackgroundVisible())
	{
		// Lets make wrapper panel behave like a floater
		setBackgroundOpaque(FALSE);
	}
}
void LLToast::onFocusReceived()
{
	if(mWrapperPanel && !isBackgroundVisible())
	{
		// Lets make wrapper panel behave like a floater
		setBackgroundOpaque(TRUE);
	}
}
S32 LLToast::getTopPad()
{
	if(mWrapperPanel)
	{
		return getRect().getHeight() - mWrapperPanel->getRect().getHeight();
	}
	return 0;
}
S32 LLToast::getRightPad()
{
	if(mWrapperPanel)
	{
		return getRect().getWidth() - mWrapperPanel->getRect().getWidth();
	}
	return 0;
}
//--------------------------------------------------------------------------
void LLToast::setCanFade(bool can_fade) 
{ 
	mCanFade = can_fade; 
	if(!mCanFade)
		mTimer.stop();
}
//--------------------------------------------------------------------------
void LLToast::tick()
{
	if(mCanFade)
	{
		hide();
	}
}
//--------------------------------------------------------------------------
void LLToast::reshapeToPanel()
{
	LLPanel* panel = getPanel();
	if(!panel)
		return;
	LLRect panel_rect = panel->getRect();
	panel_rect.setLeftTopAndSize(0, panel_rect.getHeight(), panel_rect.getWidth(), panel_rect.getHeight());
	panel->setShape(panel_rect);
	
	LLRect toast_rect = getRect();
	toast_rect.setLeftTopAndSize(toast_rect.mLeft, toast_rect.mTop,
		panel_rect.getWidth() + getRightPad(), panel_rect.getHeight() + getTopPad());
	setShape(toast_rect);
}
void LLToast::insertPanel(LLPanel* panel)
{
	mWrapperPanel->addChild(panel);	
	reshapeToPanel();
}
//--------------------------------------------------------------------------
void LLToast::draw()
{
	if(lifetimeHasExpired())
	{
		tick();
	}
	LLFloater::draw();
	if(!isBackgroundVisible())
	{
		// Floater background is invisible, lets make wrapper panel look like a 
		// floater - draw shadow.
		drawShadow(mWrapperPanel);
		// Shadow will probably overlap close button, lets redraw the button
		if(mHideBtn)
		{
			drawChild(mHideBtn);
		}
	}
}
//--------------------------------------------------------------------------
void LLToast::setVisible(BOOL show)
{
	if(mIsHidden)
	{
		// this toast is invisible after fade until its ScreenChannel will allow it
		//
		// (EXT-1849) according to this bug a toast can be resurrected from
		// invisible state if it faded during a teleportation
		// then it fades a second time and causes a crash
		return;
	}
	if(show)
	{
		setBackgroundOpaque(TRUE);
		if(!mTimer.getStarted() && mCanFade)
		{
			mTimer.start();
		}
		LLModalDialog::setFrontmost(FALSE);
	}
	LLFloater::setVisible(show);
	if(mPanel)
	{
		if(!mPanel->isDead())
		{
			mPanel->setVisible(show);
		}
	}
}
void LLToast::onToastMouseEnter()
{
	LLRect panel_rc = mWrapperPanel->calcScreenRect();
	LLRect button_rc;
	if(mHideBtn)
	{
		button_rc = mHideBtn->calcScreenRect();
	}
	S32 x, y;
	LLUI::getMousePositionScreen(&x, &y);
	if(panel_rc.pointInRect(x, y) || button_rc.pointInRect(x, y))
	{
		mOnToastHoverSignal(this, MOUSE_ENTER);
		setBackgroundOpaque(TRUE);
		//toasts fading is management by Screen Channel
		sendChildToFront(mHideBtn);
		if(mHideBtn && mHideBtn->getEnabled())
		{
			mHideBtn->setVisible(TRUE);
		}
		mOnMouseEnterSignal(this);
		mToastMouseEnterSignal(this, getValue());
	}
}
void LLToast::onToastMouseLeave()
{
	LLRect panel_rc = mWrapperPanel->calcScreenRect();
	LLRect button_rc;
	if(mHideBtn)
	{
		button_rc = mHideBtn->calcScreenRect();
	}
	S32 x, y;
	LLUI::getMousePositionScreen(&x, &y);
	if( !panel_rc.pointInRect(x, y) && !button_rc.pointInRect(x, y))
	{
		mOnToastHoverSignal(this, MOUSE_LEAVE);
		//toasts fading is management by Screen Channel
		if(mHideBtn && mHideBtn->getEnabled())
		{
			if( mHideBtnPressed )
			{
				mHideBtnPressed = false;
				return;
			}
			mHideBtn->setVisible(FALSE);		
		}
		mToastMouseLeaveSignal(this, getValue());
	}
}
void LLToast::setBackgroundOpaque(BOOL b)
{
	if(mWrapperPanel && !isBackgroundVisible())
	{
		mWrapperPanel->setBackgroundOpaque(b);
	}
	else
	{
		LLModalDialog::setBackgroundOpaque(b);
	}
}
void LLNotificationsUI::LLToast::stopFading()
{
	if(mCanFade)
	{
		stopTimer();
	}
}
void LLNotificationsUI::LLToast::startFading()
{
	if(mCanFade)
	{
		resetTimer();
	}
}
bool LLToast::isHovered()
{
	S32 x, y;
	LLUI::getMousePositionScreen(&x, &y);
	return mWrapperPanel->calcScreenRect().pointInRect(x, y);
}
//--------------------------------------------------------------------------
BOOL LLToast::handleMouseDown(S32 x, S32 y, MASK mask)
{
	if(mHideBtn && mHideBtn->getEnabled())
	{
		mHideBtnPressed = mHideBtn->getRect().pointInRect(x, y);
	}
	return LLFloater::handleMouseDown(x, y, mask);
}
//--------------------------------------------------------------------------
bool LLToast::isNotificationValid()
{
	if(mNotification)
	{
		return !mNotification->isCancelled();
	}
	return false;
}
//--------------------------------------------------------------------------

						