From b1bf8443b2a8340d0d873e8b6b82ba22a8019a36 Mon Sep 17 00:00:00 2001
From: Andrey Kleshchev <andreykproductengine@lindenlab.com>
Date: Thu, 9 Apr 2020 21:39:15 +0300
Subject: SL-12999 Some menus allow mouse scroll to zoom camera

---
 indra/newview/llpanelpulldown.cpp | 118 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 indra/newview/llpanelpulldown.cpp

(limited to 'indra/newview/llpanelpulldown.cpp')

diff --git a/indra/newview/llpanelpulldown.cpp b/indra/newview/llpanelpulldown.cpp
new file mode 100644
index 0000000000..4de6ee8182
--- /dev/null
+++ b/indra/newview/llpanelpulldown.cpp
@@ -0,0 +1,118 @@
+/**
+* @file llpanelpulldown.cpp
+* @brief A panel that serves as a basis for multiple toolbar pulldown panels
+*
+* $LicenseInfo:firstyear=2020&license=viewerlgpl$
+* Second Life Viewer Source Code
+* Copyright (C) 2020, 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 "llpanelpulldown.h"
+
+const F32 AUTO_CLOSE_FADE_TIME_START_SEC = 2.0f;
+const F32 AUTO_CLOSE_FADE_TIME_END_SEC = 3.0f;
+
+///----------------------------------------------------------------------------
+/// Class LLPanelPresetsCameraPulldown
+///----------------------------------------------------------------------------
+
+// Default constructor
+LLPanelPulldown::LLPanelPulldown()
+{
+    mHoverTimer.stop();
+}
+
+/*virtual*/
+void LLPanelPulldown::onMouseEnter(S32 x, S32 y, MASK mask)
+{
+    mHoverTimer.stop();
+    LLPanel::onMouseEnter(x, y, mask);
+}
+
+/*virtual*/
+void LLPanelPulldown::onTopLost()
+{
+    setVisible(FALSE);
+}
+
+/*virtual*/
+BOOL LLPanelPulldown::handleMouseDown(S32 x, S32 y, MASK mask)
+{
+    LLPanel::handleMouseDown(x, y, mask);
+    return TRUE;
+}
+
+/*virtual*/
+BOOL LLPanelPulldown::handleRightMouseDown(S32 x, S32 y, MASK mask)
+{
+    LLPanel::handleRightMouseDown(x, y, mask);
+    return TRUE;
+}
+
+/*virtual*/
+BOOL LLPanelPulldown::handleDoubleClick(S32 x, S32 y, MASK mask)
+{
+    LLPanel::handleDoubleClick(x, y, mask);
+    return TRUE;
+}
+
+BOOL LLPanelPulldown::handleScrollWheel(S32 x, S32 y, S32 clicks)
+{
+    LLPanel::handleScrollWheel(x, y, clicks);
+    return TRUE; //If we got here, then we are in Pulldown's rect, consume the event.
+}
+
+/*virtual*/
+void LLPanelPulldown::onMouseLeave(S32 x, S32 y, MASK mask)
+{
+    mHoverTimer.start();
+    LLPanel::onMouseLeave(x, y, mask);
+}
+
+/*virtual*/
+void LLPanelPulldown::onVisibilityChange(BOOL new_visibility)
+{
+    if (new_visibility)
+    {
+        mHoverTimer.start(); // timer will be stopped when mouse hovers over panel
+    }
+    else
+    {
+        mHoverTimer.stop();
+    }
+}
+
+//virtual
+void LLPanelPulldown::draw()
+{
+    F32 alpha = mHoverTimer.getStarted()
+        ? clamp_rescale(mHoverTimer.getElapsedTimeF32(), AUTO_CLOSE_FADE_TIME_START_SEC, AUTO_CLOSE_FADE_TIME_END_SEC, 1.f, 0.f)
+        : 1.0f;
+    LLViewDrawContext context(alpha);
+
+    LLPanel::draw();
+
+    if (alpha == 0.f)
+    {
+        setVisible(FALSE);
+    }
+}
-- 
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