Add in LLLoadingIndicator

2019-01-21 12:08:39 -05:00
parent c8d95e58c3
commit bde8782328
16 changed files with 223 additions and 0 deletions
--- a/indra/llui/llloadingindicator.cpp
+++ b/indra/llui/llloadingindicator.cpp
@@ -0,0 +1,104 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check it.
+// PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+/** 
+ * @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"
+
+static LLRegisterWidget<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)
+{
+	for (LLUIImage* image : p.images().image)
+	{
+		mImages.push_back(image);
+	}
+
+	if (mImages.empty()) // Singu Note: We don't have default widgets yet, so let's just handle this here
+		for (int i = 1; i <= 12; ++i)
+			mImages.push_back(LLUI::getUIImage(llformat("Progress_%d", i)));
+
+	// 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);
+}