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/**
* @file llloadingindicator.h
* @brief Perpetual loading indicator
*
* $LicenseInfo:firstyear=2010&license=viewerlgpl$
* 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
* $/LicenseInfo$
*/
#ifndef LL_LLLOADINGINDICATOR_H
#define LL_LLLOADINGINDICATOR_H
#include "lluictrl.h"
#include "lluiimage.h"
///////////////////////////////////////////////////////////////////////////////
// class LLLoadingIndicator
///////////////////////////////////////////////////////////////////////////////
/**
* Perpetual loading indicator (a la MacOSX or YouTube)
*
* Number of rotations per second can be overridden
* with the "images_per_sec" parameter.
*
* Can start/stop spinning.
*
* @see start()
* @see stop()
*/
class LLLoadingIndicator
: public LLUICtrl
{
LOG_CLASS(LLLoadingIndicator);
public:
struct Images : public LLInitParam::Block<Images>
{
Multiple<LLUIImage*> image;
Images()
: image("image")
{}
};
struct Params : public LLInitParam::Block<Params, LLUICtrl::Params>
{
Optional<F32> images_per_sec;
Optional<Atomic<Images> > images;
Params()
: images_per_sec("images_per_sec", 1.0f),
images("images")
{}
};
virtual ~LLLoadingIndicator() {}
// llview overrides
virtual void draw();
/**
* Stop spinning.
*/
void stop();
/**
* Start spinning.
*/
void start();
void reset() { mCurImageIdx = 0; }
private:
LLLoadingIndicator(const Params&);
void initFromParams(const Params&);
friend class LLUICtrlFactory;
F32 mImagesPerSec;
S8 mCurImageIdx;
LLFrameTimer mImageSwitchTimer;
std::vector<LLUIImagePtr> mImages;
};
#endif // LL_LLLOADINGINDICATOR_H
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