7 files changed, 92 insertions, 2 deletions

diff --git a/indra/newview/llfloaterhoverheight.cpp b/indra/newview/llfloaterhoverheight.cpp
index 2ac61efc0c..69b58b3af5 100755
--- a/indra/newview/llfloaterhoverheight.cpp
+++ b/indra/newview/llfloaterhoverheight.cpp
@@ -77,6 +77,13 @@ BOOL LLFloaterHoverHeight::postBuild()
 		LL_WARNS() << "Control not found for AvatarHoverOffsetZ" << LL_ENDL;
 	}
 
+	updateEditEnabled();
+
+	if (!mRegionBoundarySlot.connected())
+	{
+		mRegionBoundarySlot = gAgent.addRegionChangedCallback(boost::bind(&LLFloaterHoverHeight::onRegionChanged,this));
+	}
+
 	return TRUE;
 }
 
@@ -98,4 +105,37 @@ void LLFloaterHoverHeight::onFinalCommit()
 	gSavedPerAccountSettings.setF32("AvatarHoverOffsetZ",value);
 }
 
+void LLFloaterHoverHeight::onRegionChanged()
+{
+	LLViewerRegion *region = gAgent.getRegion();
+	if (region && region->simulatorFeaturesReceived())
+	{
+		updateEditEnabled();
+	}
+	else if (region)
+	{
+		region->setSimulatorFeaturesReceivedCallback(boost::bind(&LLFloaterHoverHeight::onSimulatorFeaturesReceived,this,_1));
+	}
+}
+
+void LLFloaterHoverHeight::onSimulatorFeaturesReceived(const LLUUID &region_id)
+{
+	LLViewerRegion *region = gAgent.getRegion();
+	if (region && (region->getRegionID()==region_id))
+	{
+		updateEditEnabled();
+	}
+}
+
+void LLFloaterHoverHeight::updateEditEnabled()
+{
+	bool enabled = gAgent.getRegion() && gAgent.getRegion()->avatarHoverHeightEnabled();
+	LLSliderCtrl* sldrCtrl = getChild<LLSliderCtrl>("HoverHeightSlider");
+	sldrCtrl->setEnabled(enabled);
+	if (enabled)
+	{
+		syncFromPreferenceSetting(this);
+	}
+}
+
 
diff --git a/indra/newview/llfloaterhoverheight.h b/indra/newview/llfloaterhoverheight.h
index 586871374f..8fd24d8813 100755
--- a/indra/newview/llfloaterhoverheight.h
+++ b/indra/newview/llfloaterhoverheight.h
@@ -40,6 +40,13 @@ public:
 	void onFinalCommit();
 
 	static void syncFromPreferenceSetting(void *user_data);
+
+	void onRegionChanged();
+	void onSimulatorFeaturesReceived(const LLUUID &region_id);
+	void updateEditEnabled();
+
+
+	boost::signals2::connection                   mRegionBoundarySlot;
 };
 
 #endif
diff --git a/indra/newview/llviewermenu.cpp b/indra/newview/llviewermenu.cpp
index 302dd6f889..c7bf8a1c31 100755
--- a/indra/newview/llviewermenu.cpp
+++ b/indra/newview/llviewermenu.cpp
@@ -3885,7 +3885,7 @@ class LLEnableHoverHeight : public view_listener_t
 {
 	bool handleEvent(const LLSD& userdata)
 	{
-		return true;
+		return gAgent.getRegion() && gAgent.getRegion()->avatarHoverHeightEnabled();
 	}
 };
 
diff --git a/indra/newview/llviewerregion.cpp b/indra/newview/llviewerregion.cpp
index 11cbf3fc24..b05e771f96 100755
--- a/indra/newview/llviewerregion.cpp
+++ b/indra/newview/llviewerregion.cpp
@@ -424,6 +424,7 @@ LLViewerRegion::LLViewerRegion(const U64 &handle,
 	mCacheDirty(FALSE),
 	mReleaseNotesRequested(FALSE),
 	mCapabilitiesReceived(false),
+	mSimulatorFeaturesReceived(false),
 	mBitsReceived(0.f),
 	mPacketsReceived(0.f),
 	mDead(FALSE),
@@ -2027,6 +2028,26 @@ void LLViewerRegion::getInfo(LLSD& info)
 	info["Region"]["Handle"]["y"] = (LLSD::Integer)y;
 }
 
+boost::signals2::connection LLViewerRegion::setSimulatorFeaturesReceivedCallback(const caps_received_signal_t::slot_type& cb)
+{
+	return mSimulatorFeaturesReceivedSignal.connect(cb);
+}
+
+void LLViewerRegion::setSimulatorFeaturesReceived(bool received)
+{
+	mSimulatorFeaturesReceived = received;
+	if (received)
+	{
+		mSimulatorFeaturesReceivedSignal(getRegionID());
+		mSimulatorFeaturesReceivedSignal.disconnect_all_slots();
+	}
+}
+
+bool LLViewerRegion::simulatorFeaturesReceived() const
+{
+	return mSimulatorFeaturesReceived;
+}
+
 void LLViewerRegion::getSimulatorFeatures(LLSD& sim_features) const
 {
 	sim_features = mSimulatorFeatures;
@@ -2040,6 +2061,9 @@ void LLViewerRegion::setSimulatorFeatures(const LLSD& sim_features)
 	LLSDSerialize::toPrettyXML(sim_features, str);
 	LL_INFOS() << str.str() << LL_ENDL;
 	mSimulatorFeatures = sim_features;
+
+	setSimulatorFeaturesReceived(true);
+	
 }
 
 //this is called when the parent is not cacheable.
@@ -3088,6 +3112,12 @@ bool LLViewerRegion::dynamicPathfindingEnabled() const
 	return ( mSimulatorFeatures.has("DynamicPathfindingEnabled") &&
 			 mSimulatorFeatures["DynamicPathfindingEnabled"].asBoolean());
 }
+
+bool LLViewerRegion::avatarHoverHeightEnabled() const
+{
+	return ( mSimulatorFeatures.has("AvatarHoverHeightEnabled") &&
+			 mSimulatorFeatures["AvatarHoverHeightEnabled"].asBoolean());
+}
 /* Static Functions */
 
 void log_capabilities(const CapabilityMap &capmap)
diff --git a/indra/newview/llviewerregion.h b/indra/newview/llviewerregion.h
index 1e225553b8..aaa1466939 100755
--- a/indra/newview/llviewerregion.h
+++ b/indra/newview/llviewerregion.h
@@ -309,12 +309,19 @@ public:
 	bool meshRezEnabled() const;
 	bool meshUploadEnabled() const;
 
+	// has region received its simulator features list? Requires an additional query after caps received.
+	void setSimulatorFeaturesReceived(bool);
+	bool simulatorFeaturesReceived() const;
+	boost::signals2::connection setSimulatorFeaturesReceivedCallback(const caps_received_signal_t::slot_type& cb);
+	
 	void getSimulatorFeatures(LLSD& info) const;	
 	void setSimulatorFeatures(const LLSD& info);
 
 	
 	bool dynamicPathfindingEnabled() const;
 
+	bool avatarHoverHeightEnabled() const;
+
 	typedef enum
 	{
 		CACHE_MISS_TYPE_FULL = 0,
@@ -512,6 +519,7 @@ private:
 	BOOL                                    mCacheDirty;
 	BOOL	mAlive;					// can become false if circuit disconnects
 	BOOL	mCapabilitiesReceived;
+	BOOL	mSimulatorFeaturesReceived;
 	BOOL    mReleaseNotesRequested;
 	BOOL    mDead;  //if true, this region is in the process of deleting.
 	BOOL    mPaused; //pause processing the objects in the region
@@ -532,11 +540,13 @@ private:
 	CacheMissItem::cache_miss_list_t   mCacheMissList;
 	
 	caps_received_signal_t mCapabilitiesReceivedSignal;		
+	caps_received_signal_t mSimulatorFeaturesReceivedSignal;		
+
 	LLSD mSimulatorFeatures;
 
 	// the materials capability throttle
 	LLFrameTimer mMaterialsCapThrottleTimer;
-LLFrameTimer	mRenderInfoRequestTimer;
+	LLFrameTimer mRenderInfoRequestTimer;
 };
 
 inline BOOL LLViewerRegion::getRegionProtocol(U64 protocol) const
diff --git a/indra/newview/llvoavatar.cpp b/indra/newview/llvoavatar.cpp
index 059a03a072..10bc6ad336 100755
--- a/indra/newview/llvoavatar.cpp
+++ b/indra/newview/llvoavatar.cpp
@@ -3220,6 +3220,8 @@ BOOL LLVOAvatar::updateCharacter(LLAgent &agent)
 			debug_line += llformat(" - cof rcv:%d", last_received_cof_version);
 		}
 		debug_line += llformat(" bsz-z: %f avofs-z: %f", mBodySize[2], mAvatarOffset[2]);
+		bool hover_enabled = getRegion() && getRegion()->avatarHoverHeightEnabled();
+		debug_line += hover_enabled ? " H" : " h";
 		if (mHoverOffset[2] != 0.0)
 		{
 			debug_line += llformat(" hov_z: %f", mHoverOffset[2]);
diff --git a/indra/newview/skins/default/xui/en/floater_edit_hover_height.xml b/indra/newview/skins/default/xui/en/floater_edit_hover_height.xml
index 8fc20d28fb..8ec6735a01 100755
--- a/indra/newview/skins/default/xui/en/floater_edit_hover_height.xml
+++ b/indra/newview/skins/default/xui/en/floater_edit_hover_height.xml
@@ -18,6 +18,7 @@
  title="SET HOVER HEIGHT"
  width="515">
       <slider
+     enabled="false"
      control_name="HoverHeightSlider"
      decimal_digits="3"
      follows="top|left"