/** * @file llloadingindicator.cpp * @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 * $/LicenseInfo$ */ #include "linden_common.h" #include "llloadingindicator.h" // Linden library includes #include "llsingleton.h" // Project includes #include "lluictrlfactory.h" #include "lluiimage.h" #include "boost/foreach.hpp" // registered in llui.cpp to avoid being left out by MS linker //static LLDefaultChildRegistry::Register<LLLoadingIndicator> r("loading_indicator"); /////////////////////////////////////////////////////////////////////////////// // LLLoadingIndicator class /////////////////////////////////////////////////////////////////////////////// LLLoadingIndicator::LLLoadingIndicator(const Params& p) : LLUICtrl(p), mImagesPerSec(p.images_per_sec > 0 ? p.images_per_sec : 1.0f), mCurImageIdx(0) { } void LLLoadingIndicator::initFromParams(const Params& p) { BOOST_FOREACH(LLUIImage* image, p.images().image) { mImages.push_back(image); } // Start timer for switching images. start(); } void LLLoadingIndicator::draw() { // Time to switch to the next image? if (mImageSwitchTimer.getStarted() && mImageSwitchTimer.hasExpired()) { // Switch to the next image. if (!mImages.empty()) { mCurImageIdx = (mCurImageIdx + 1) % mImages.size(); } // Restart timer. start(); } LLUIImagePtr cur_image = mImages.empty() ? LLUIImagePtr(NULL) : mImages[mCurImageIdx]; // Draw current image. if( cur_image.notNull() ) { cur_image->draw(getLocalRect(), LLColor4::white % getDrawContext().mAlpha); } LLUICtrl::draw(); } void LLLoadingIndicator::stop() { mImageSwitchTimer.stop(); } void LLLoadingIndicator::start() { mImageSwitchTimer.start(); F32 period = 1.0f / (mImages.size() * mImagesPerSec); mImageSwitchTimer.setTimerExpirySec(period); }