lltoolgrab.cpp

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#include "llviewerprecompiledheaders.h"

#include "lltoolgrab.h"
 
// library headers
#include "indra_constants.h"            // for agent control flags
#include "llviewercontrol.h"
#include "llquaternion.h"
#include "llbox.h"
#include "message.h"
#include "llview.h"
#include "llfontgl.h"
#include "llui.h"

// newview headers
#include "llagent.h"
//#include "llfloateravatarinfo.h"
#include "lldrawable.h"
#include "llfloatertools.h"
#include "llhudeffect.h"
#include "llhudmanager.h"
#include "llregionposition.h"
#include "llselectmgr.h"
#include "llstatusbar.h"
#include "lltoolmgr.h"
#include "lltoolpie.h"
#include "llviewercamera.h"
#include "llviewerobject.h"
#include "llviewerobjectlist.h" 
#include "llviewerregion.h"
#include "llviewerwindow.h"
#include "llvoavatar.h"
#include "llworld.h"
#include "viewer.h"

const S32 SLOP_DIST_SQ = 4;

// Override modifier key behavior with these buttons
BOOL gGrabBtnVertical = FALSE;
BOOL gGrabBtnSpin = FALSE;
LLTool* gGrabTransientTool = NULL;
LLToolGrab *gToolGrab = NULL;
extern BOOL gDebugClicks;

//
// Methods
//
LLToolGrab::LLToolGrab( LLToolComposite* composite )
:       LLTool( "Grab", composite ),
        mMode( GRAB_INACTIVE ),
        mVerticalDragging( FALSE ),
        mHitLand(FALSE),
        mHitObjectID(),
        mGrabObject( NULL ),
        mMouseDownX( -1 ),
        mMouseDownY( -1 ),
        mHasMoved( FALSE ),
        mSpinGrabbing( FALSE ),
        mSpinRotation(),
        mHideBuildHighlight(FALSE)
{ }

LLToolGrab::~LLToolGrab()
{ }


// virtual
void LLToolGrab::handleSelect()
{
        if(gFloaterTools)
        {
                // viewer can crash during startup if we don't check.
                gFloaterTools->setStatusText("grab");
        }
        gGrabBtnVertical = FALSE;
        gGrabBtnSpin = FALSE;
}

void LLToolGrab::handleDeselect()
{
        if( hasMouseCapture() )
        {
                setMouseCapture( FALSE );
        }

}

BOOL LLToolGrab::handleDoubleClick(S32 x, S32 y, MASK mask)
{
        if (gDebugClicks)
        {
                llinfos << "LLToolGrab handleDoubleClick (becoming mouseDown)" << llendl;
        }

        return FALSE;
}

BOOL LLToolGrab::handleMouseDown(S32 x, S32 y, MASK mask)
{
        if (gDebugClicks)
        {
                llinfos << "LLToolGrab handleMouseDown" << llendl;
        }

        mHitLand = FALSE;

        // call the base class to propogate info to sim
        LLTool::handleMouseDown(x, y, mask);
        
        if (!gAgent.leftButtonGrabbed())
        {
                // can grab transparent objects (how touch event propagates, scripters rely on this)
                gViewerWindow->hitObjectOrLandGlobalAsync(x, y, mask, pickCallback, TRUE);
        }
        return TRUE;
}

void LLToolGrab::pickCallback(S32 x, S32 y, MASK mask)
{
        LLViewerObject  *objectp = gObjectList.findObject( gLastHitObjectID );

        BOOL extend_select = (mask & MASK_SHIFT);

        if (!extend_select && !gSelectMgr->getSelection()->isEmpty())
        {
                gSelectMgr->deselectAll();
                gToolGrab->mDeselectedThisClick = TRUE;
        }
        else
        {
                gToolGrab->mDeselectedThisClick = FALSE;
        }

        // if not over object, do nothing
        if (!objectp)
        {
                gToolGrab->setMouseCapture(TRUE);
                gToolGrab->mMode = GRAB_NOOBJECT;
                gToolGrab->mHitObjectID.setNull();
        }
        else
        {
                gToolGrab->handleObjectHit(objectp, x, y, mask);
        }
}

BOOL LLToolGrab::handleObjectHit(LLViewerObject *objectp, S32 x, S32 y, MASK mask)
{
        mMouseDownX = x;
        mMouseDownY = y;
        mMouseMask = mask;

        if (gDebugClicks)
        {
                llinfos << "LLToolGrab handleObjectHit " << mMouseDownX << "," << mMouseDownY << llendl;
        }

        if (NULL == objectp) // unexpected
        {
                llwarns << "objectp was NULL; returning FALSE" << llendl;
                return FALSE;
        }

        if (objectp->isAvatar())
        {
                if (gGrabTransientTool)
                {
                        gBasicToolset->selectTool( gGrabTransientTool );
                        gGrabTransientTool = NULL;
                }
                return TRUE;
        }

        setMouseCapture( TRUE );

        mHitObjectID = objectp->getID();

        // Grabs always start from the root
        // objectp = (LLViewerObject *)objectp->getRoot();

        LLViewerObject* parent = objectp->getRootEdit();
        BOOL script_touch = (objectp->flagHandleTouch()) || (parent && parent->flagHandleTouch());

        // Clicks on scripted or physical objects are temporary grabs, so
        // not "Build mode"
        mHideBuildHighlight = script_touch || objectp->usePhysics();

        if (!objectp->usePhysics())
        {
                // In mouselook, we shouldn't be able to grab non-physical, 
                // non-touchable objects.  If it has a touch handler, we
                // do grab it (so llDetectedGrab works), but movement is
                // blocked on the server side. JC
                if (gAgent.cameraMouselook() && !script_touch)
                {
                        mMode = GRAB_LOCKED;
                }
                else
                {
                        mMode = GRAB_NONPHYSICAL;
                }
                gViewerWindow->hideCursor();
                gViewerWindow->moveCursorToCenter();
                // Don't bail out here, go on and grab so buttons can get
                // their "touched" event.
        }
        else if( !objectp->permMove() )
        {
                // if mouse is over a physical object without move permission, show feedback if user tries to move it.
                mMode = GRAB_LOCKED;

                // Don't bail out here, go on and grab so buttons can get
                // their "touched" event.
        }
        else
        {
                // if mouse is over a physical object with move permission, 
                // select it and enter "grab" mode (hiding cursor, etc.)

                mMode = GRAB_ACTIVE_CENTER;

                gViewerWindow->hideCursor();
                gViewerWindow->moveCursorToCenter();
        }

        // Always send "touched" message

        mAccumDeltaX = 0;
        mAccumDeltaY = 0;
        mHasMoved = FALSE;
        mOutsideSlop = FALSE;

        mGrabObject = objectp;

        mGrabOffset.clearVec();

        mVerticalDragging = (mask == MASK_VERTICAL) || gGrabBtnVertical;

        startGrab(x, y);

        if ((mask == MASK_SPIN) || gGrabBtnSpin)
        {
                startSpin();
        }

        gSelectMgr->updateSelectionCenter();            // update selection beam

        // update point at
        LLViewerObject *edit_object = gObjectList.findObject(mHitObjectID);
        if (edit_object)
        {
                LLVector3 local_edit_point = gAgent.getPosAgentFromGlobal(gLastHitNonFloraPosGlobal);
                local_edit_point -= edit_object->getPositionAgent();
                local_edit_point = local_edit_point * ~edit_object->getRenderRotation();
                gAgent.setPointAt(POINTAT_TARGET_GRAB, edit_object, local_edit_point );
                gAgent.setLookAt(LOOKAT_TARGET_SELECT, edit_object, local_edit_point );
        }

        // on transient grabs (clicks on world objects), kill the grab immediately
        if (!gViewerWindow->getLeftMouseDown() 
                && gGrabTransientTool 
                && (mMode == GRAB_NONPHYSICAL || mMode == GRAB_LOCKED))
        {
                gBasicToolset->selectTool( gGrabTransientTool );
                gGrabTransientTool = NULL;
        }

        return TRUE;
}


void LLToolGrab::startSpin()
{
        mSpinGrabbing = TRUE;

        // Was saveSelectedObjectTransform()
        LLViewerObject *root = (LLViewerObject *)mGrabObject->getRoot();
        mSpinRotation = root->getRotation();

        LLMessageSystem *msg = gMessageSystem;
        msg->newMessageFast(_PREHASH_ObjectSpinStart);
        msg->nextBlockFast(_PREHASH_AgentData);
        msg->addUUIDFast(_PREHASH_AgentID, gAgent.getID() );
        msg->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID());
        msg->nextBlockFast(_PREHASH_ObjectData);
        msg->addUUIDFast(_PREHASH_ObjectID, mGrabObject->getID() );
        msg->sendMessage( mGrabObject->getRegion()->getHost() );
}


void LLToolGrab::stopSpin()
{
        mSpinGrabbing = FALSE;

        LLMessageSystem *msg = gMessageSystem;
        switch(mMode)
        {
        case GRAB_ACTIVE_CENTER:
        case GRAB_NONPHYSICAL:
        case GRAB_LOCKED:
                msg->newMessageFast(_PREHASH_ObjectSpinStop);
                msg->nextBlockFast(_PREHASH_AgentData);
                msg->addUUIDFast(_PREHASH_AgentID, gAgent.getID() );
                msg->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID());
                msg->nextBlockFast(_PREHASH_ObjectData);
                msg->addUUIDFast(_PREHASH_ObjectID, mGrabObject->getID() );
                msg->sendMessage( mGrabObject->getRegion()->getHost() );
                break;

        case GRAB_NOOBJECT:
        case GRAB_INACTIVE:
        default:
                // do nothing
                break;
        }
}


void LLToolGrab::startGrab(S32 x, S32 y)
{
        // Compute grab_offset in the OBJECT's root's coordinate frame
        // (sometimes root == object)
        LLViewerObject *root = (LLViewerObject *)mGrabObject->getRoot();

        // drag from center
        LLVector3d grab_start_global = root->getPositionGlobal();

        // Where the grab starts, relative to the center of the root object of the set.
        // JC - This code looks wonky, but I believe it does the right thing.
        // Otherwise, when you grab a linked object set, it "pops" on the start
        // of the drag.
        LLVector3d grab_offsetd = root->getPositionGlobal() - mGrabObject->getPositionGlobal();

        LLVector3 grab_offset;
        grab_offset.setVec(grab_offsetd);

        LLQuaternion rotation = root->getRotation();
        rotation.conjQuat();
        grab_offset = grab_offset * rotation;

        // This planar drag starts at the grab point
        mDragStartPointGlobal = grab_start_global;
        mDragStartFromCamera = grab_start_global - gAgent.getCameraPositionGlobal();

        LLMessageSystem *msg = gMessageSystem;
        msg->newMessageFast(_PREHASH_ObjectGrab);
        msg->nextBlockFast(_PREHASH_AgentData);
        msg->addUUIDFast(_PREHASH_AgentID, gAgent.getID());
        msg->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID());
        msg->nextBlockFast(_PREHASH_ObjectData);
        msg->addU32Fast(_PREHASH_LocalID, mGrabObject->mLocalID);
        msg->addVector3Fast(_PREHASH_GrabOffset, grab_offset );
        msg->sendMessage( mGrabObject->getRegion()->getHost());

        mGrabOffsetFromCenterInitial = grab_offset;
        mGrabHiddenOffsetFromCamera = mDragStartFromCamera;

        mGrabTimer.reset();
}


BOOL LLToolGrab::handleHover(S32 x, S32 y, MASK mask)
{
        mLastMouseX = x;
        mLastMouseY = y;

        if (!gViewerWindow->getLeftMouseDown())
        {
                gViewerWindow->setCursor(UI_CURSOR_TOOLGRAB);
                setMouseCapture(FALSE);
                return TRUE;
        }

        // Do the right hover based on mode
        switch( mMode )
        {
        case GRAB_ACTIVE_CENTER:
        case GRAB_NONPHYSICAL:
                handleHoverActive( x, y, mask );        // cursor hidden
                break;

        case GRAB_INACTIVE:
                handleHoverInactive( x, y, mask );  // cursor set here
                break;

        case GRAB_NOOBJECT:
        case GRAB_LOCKED:
                handleHoverFailed( x, y, mask );
                break;

        }

        return TRUE;
}



                
// Dragging.
void LLToolGrab::handleHoverActive(S32 x, S32 y, MASK mask)
{
        llassert( hasMouseCapture() );
        llassert( mGrabObject );
        if (mGrabObject->isDead())
        {
                // Bail out of drag because object has been killed
                setMouseCapture(FALSE);
                return;
        }

        //--------------------------------------------------
        // Toggle spinning
        //--------------------------------------------------
        if (mSpinGrabbing && !(mask == MASK_SPIN) && !gGrabBtnSpin)
        {
                // user released ALT key, stop spinning
                stopSpin();
        }
        else if (!mSpinGrabbing && (mask == MASK_SPIN) )
        {
                // user pressed ALT key, start spinning
                startSpin();
        }

        //--------------------------------------------------
        // Toggle vertical dragging
        //--------------------------------------------------
        if (mVerticalDragging && !(mask == MASK_VERTICAL) && !gGrabBtnVertical)
        {
                // ...switch to horizontal dragging
                mVerticalDragging = FALSE;

                mDragStartPointGlobal = gViewerWindow->clickPointInWorldGlobal(x, y, mGrabObject);
                mDragStartFromCamera = mDragStartPointGlobal - gAgent.getCameraPositionGlobal();
        }
        else if (!mVerticalDragging && (mask == MASK_VERTICAL) )
        {
                // ...switch to vertical dragging
                mVerticalDragging = TRUE;

                mDragStartPointGlobal = gViewerWindow->clickPointInWorldGlobal(x, y, mGrabObject);
                mDragStartFromCamera = mDragStartPointGlobal - gAgent.getCameraPositionGlobal();
        }

        const F32 RADIANS_PER_PIXEL_X = 0.01f;
        const F32 RADIANS_PER_PIXEL_Y = 0.01f;

        const F32 SENSITIVITY_X = 0.0075f;
        const F32 SENSITIVITY_Y = 0.0075f;

        S32 dx = x - (gViewerWindow->getWindowWidth() / 2);
        S32 dy = y - (gViewerWindow->getWindowHeight() / 2);

        if (dx != 0 || dy != 0)
        {
                mAccumDeltaX += dx;
                mAccumDeltaY += dy;
                S32 dist_sq = mAccumDeltaX * mAccumDeltaX + mAccumDeltaY * mAccumDeltaY;
                if (dist_sq > SLOP_DIST_SQ)
                {
                        mOutsideSlop = TRUE;
                }

                // mouse has moved outside center
                mHasMoved = TRUE;
                
                if (mSpinGrabbing)
                {
                        //------------------------------------------------------
                        // Handle spinning
                        //------------------------------------------------------

                        // x motion maps to rotation around vertical axis
                        LLVector3 up(0.f, 0.f, 1.f);
                        LLQuaternion rotation_around_vertical( dx*RADIANS_PER_PIXEL_X, up );

                        // y motion maps to rotation around left axis
                        const LLVector3 &agent_left = gCamera->getLeftAxis();
                        LLQuaternion rotation_around_left( dy*RADIANS_PER_PIXEL_Y, agent_left );

                        // compose with current rotation
                        mSpinRotation = mSpinRotation * rotation_around_vertical;
                        mSpinRotation = mSpinRotation * rotation_around_left;

                        // TODO: Throttle these
                        LLMessageSystem *msg = gMessageSystem;
                        msg->newMessageFast(_PREHASH_ObjectSpinUpdate);
                        msg->nextBlockFast(_PREHASH_AgentData);
                        msg->addUUIDFast(_PREHASH_AgentID, gAgent.getID() );
                        msg->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID());
                        msg->nextBlockFast(_PREHASH_ObjectData);
                        msg->addUUIDFast(_PREHASH_ObjectID, mGrabObject->getID() );
                        msg->addQuatFast(_PREHASH_Rotation, mSpinRotation );
                        msg->sendMessage( mGrabObject->getRegion()->getHost() );
                }
                else
                {
                        //------------------------------------------------------
                        // Handle grabbing
                        //------------------------------------------------------

                        LLVector3d x_part;
                        x_part.setVec(gCamera->getLeftAxis());
                        x_part.mdV[VZ] = 0.0;
                        x_part.normVec();

                        LLVector3d y_part;
                        if( mVerticalDragging )
                        {
                                y_part.setVec(gCamera->getUpAxis());
                                // y_part.setVec(0.f, 0.f, 1.f);
                        }
                        else
                        {
                                // drag toward camera
                                y_part = x_part % LLVector3d::z_axis;
                                y_part.mdV[VZ] = 0.0;
                                y_part.normVec();
                        }

                        mGrabHiddenOffsetFromCamera = mGrabHiddenOffsetFromCamera 
                                + (x_part * (-dx * SENSITIVITY_X)) 
                                + (y_part * ( dy * SENSITIVITY_Y));


                        // Send the message to the viewer.
                        F32 dt = mGrabTimer.getElapsedTimeAndResetF32();
                        U32 dt_milliseconds = (U32) (1000.f * dt);

                        // need to return offset from mGrabStartPoint
                        LLVector3d grab_point_global;

                        grab_point_global = gAgent.getCameraPositionGlobal() + mGrabHiddenOffsetFromCamera;

                        /* Snap to grid disabled for grab tool - very confusing
                        // Handle snapping to grid, but only when the tool is formally selected.
                        BOOL snap_on = gSavedSettings.getBOOL("SnapEnabled");
                        if (snap_on && !gGrabTransientTool)
                        {
                                F64     snap_size = gSavedSettings.getF32("GridResolution");
                                U8 snap_dimensions = (mVerticalDragging ? 3 : 2);

                                for (U8 i = 0; i < snap_dimensions; i++)
                                {
                                        grab_point_global.mdV[i] += snap_size / 2;
                                        grab_point_global.mdV[i] -= fmod(grab_point_global.mdV[i], snap_size);
                                }
                        }
                        */

                        // Don't let object centers go underground.
                        F32 land_height = gWorldPointer->resolveLandHeightGlobal(grab_point_global);

                        if (grab_point_global.mdV[VZ] < land_height)
                        {
                                grab_point_global.mdV[VZ] = land_height;
                        }

                        // For safety, cap heights where objects can be dragged
                        if (grab_point_global.mdV[VZ] > MAX_OBJECT_Z)
                        {
                                grab_point_global.mdV[VZ] = MAX_OBJECT_Z;
                        }

                        grab_point_global = gWorldp->clipToVisibleRegions(mDragStartPointGlobal, grab_point_global);
                        // propagate constrained grab point back to grab offset
                        mGrabHiddenOffsetFromCamera = grab_point_global - gAgent.getCameraPositionGlobal();

                        // Handle auto-rotation at screen edge.
                        LLVector3 grab_pos_agent = gAgent.getPosAgentFromGlobal( grab_point_global );

                        LLCoordGL grab_center_gl( gViewerWindow->getWindowWidth() / 2, gViewerWindow->getWindowHeight() / 2);
                        gCamera->projectPosAgentToScreen(grab_pos_agent, grab_center_gl);

                        const S32 ROTATE_H_MARGIN = gViewerWindow->getWindowWidth() / 20;
                        const F32 ROTATE_ANGLE_PER_SECOND = 30.f * DEG_TO_RAD;
                        const F32 rotate_angle = ROTATE_ANGLE_PER_SECOND / gFPSClamped;
                        // ...build mode moves camera about focus point
                        if (grab_center_gl.mX < ROTATE_H_MARGIN)
                        {
                                if (gAgent.getFocusOnAvatar())
                                {
                                        gAgent.yaw(rotate_angle);
                                }
                                else
                                {
                                        gAgent.cameraOrbitAround(rotate_angle);
                                }
                        }
                        else if (grab_center_gl.mX > gViewerWindow->getWindowWidth() - ROTATE_H_MARGIN)
                        {
                                if (gAgent.getFocusOnAvatar())
                                {
                                        gAgent.yaw(-rotate_angle);
                                }
                                else
                                {
                                        gAgent.cameraOrbitAround(-rotate_angle);
                                }
                        }

                        // Don't move above top of screen or below bottom
                        if ((grab_center_gl.mY < gViewerWindow->getWindowHeight() - 6)
                                && (grab_center_gl.mY > 24))
                        {
                                // Transmit update to simulator
                                LLVector3 grab_pos_region = mGrabObject->getRegion()->getPosRegionFromGlobal( grab_point_global );

                                LLMessageSystem *msg = gMessageSystem;
                                msg->newMessageFast(_PREHASH_ObjectGrabUpdate);
                                msg->nextBlockFast(_PREHASH_AgentData);
                                msg->addUUIDFast(_PREHASH_AgentID, gAgent.getID());
                                msg->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID());
                                msg->nextBlockFast(_PREHASH_ObjectData);
                                msg->addUUIDFast(_PREHASH_ObjectID, mGrabObject->getID() );
                                msg->addVector3Fast(_PREHASH_GrabOffsetInitial, mGrabOffsetFromCenterInitial );
                                msg->addVector3Fast(_PREHASH_GrabPosition, grab_pos_region );
                                msg->addU32Fast(_PREHASH_TimeSinceLast, dt_milliseconds );
                                msg->sendMessage( mGrabObject->getRegion()->getHost() );
                        }
                }

                gViewerWindow->moveCursorToCenter();

                gSelectMgr->updateSelectionCenter();

        }

        // once we've initiated a drag, lock the camera down
        if (mHasMoved)
        {
                if (!gAgent.cameraMouselook() && 
                        !mGrabObject->isHUDAttachment() && 
                        mGrabObject->getRoot() == gAgent.getAvatarObject()->getRoot())
                {
                        // force focus to point in space where we were looking previously
                        gAgent.setFocusGlobal(gAgent.calcFocusPositionTargetGlobal(), LLUUID::null);
                        gAgent.setFocusOnAvatar(FALSE, ANIMATE);
                }
                else
                {
                        gAgent.clearFocusObject();
                }
        }

        // HACK to avoid assert: error checking system makes sure that the cursor is set during every handleHover.  This is actually a no-op since the cursor is hidden.
        gViewerWindow->setCursor(UI_CURSOR_ARROW);  

        lldebugst(LLERR_USER_INPUT) << "hover handled by LLToolGrab (active) [cursor hidden]" << llendl;                
}
 

// Not dragging.  Just showing affordances
void LLToolGrab::handleHoverInactive(S32 x, S32 y, MASK mask)
{
        const F32 ROTATE_ANGLE_PER_SECOND = 40.f * DEG_TO_RAD;
        const F32 rotate_angle = ROTATE_ANGLE_PER_SECOND / gFPSClamped;

        // Look for cursor against the edge of the screen
        // Only works in fullscreen
        if (gSavedSettings.getBOOL("FullScreen"))
        {
                if (gAgent.cameraThirdPerson() )
                {
                        if (x == 0)
                        {
                                gAgent.yaw(rotate_angle);
                                //gAgent.setControlFlags(AGENT_CONTROL_YAW_POS);
                        }
                        else if (x == (gViewerWindow->getWindowWidth() - 1) )
                        {
                                gAgent.yaw(-rotate_angle);
                                //gAgent.setControlFlags(AGENT_CONTROL_YAW_NEG);
                        }
                }
        }

        // JC - TODO - change cursor based on gGrabBtnVertical, gGrabBtnSpin
        lldebugst(LLERR_USER_INPUT) << "hover handled by LLToolGrab (inactive-not over editable object)" << llendl;             
        gViewerWindow->setCursor(UI_CURSOR_TOOLGRAB);
}

// User is trying to do something that's not allowed.
void LLToolGrab::handleHoverFailed(S32 x, S32 y, MASK mask)
{
        if( GRAB_NOOBJECT == mMode )
        {
                gViewerWindow->setCursor(UI_CURSOR_NO);
                lldebugst(LLERR_USER_INPUT) << "hover handled by LLToolGrab (not on object)" << llendl;         
        }
        else
        {
                S32 dist_sq = (x-mMouseDownX) * (x-mMouseDownX) + (y-mMouseDownY) * (y-mMouseDownY);
                if( mOutsideSlop || dist_sq > SLOP_DIST_SQ )
                {
                        mOutsideSlop = TRUE;

                        switch( mMode )
                        {
                        case GRAB_LOCKED:
                                gViewerWindow->setCursor(UI_CURSOR_GRABLOCKED);
                                lldebugst(LLERR_USER_INPUT) << "hover handled by LLToolGrab (grab failed, no move permission)" << llendl;               
                                break;

//  Non physical now handled by handleHoverActive - CRO                         
//                      case GRAB_NONPHYSICAL:
//                              gViewerWindow->setCursor(UI_CURSOR_ARROW);
//                              lldebugst(LLERR_USER_INPUT) << "hover handled by LLToolGrab (grab failed, nonphysical)" << llendl;              
//                              break;
                        default:
                                llassert(0);
                        }
                }
                else
                {
                        gViewerWindow->setCursor(UI_CURSOR_ARROW);
                        lldebugst(LLERR_USER_INPUT) << "hover handled by LLToolGrab (grab failed but within slop)" << llendl;           
                }
        }
}




BOOL LLToolGrab::handleMouseUp(S32 x, S32 y, MASK mask)
{
        // call the base class to propogate info to sim
        LLTool::handleMouseUp(x, y, mask);

        if( hasMouseCapture() )
        {
                setMouseCapture( FALSE );
        }
        mMode = GRAB_INACTIVE;

        // HACK: Make some grabs temporary
        if (gGrabTransientTool)
        {
                gBasicToolset->selectTool( gGrabTransientTool );
                gGrabTransientTool = NULL;
        }

        //gAgent.setObjectTracking(gSavedSettings.getBOOL("TrackFocusObject"));

        return TRUE;
} 

void LLToolGrab::stopEditing()
{
        if( hasMouseCapture() )
        {
                setMouseCapture( FALSE );
        }
}

void LLToolGrab::onMouseCaptureLost()
{
        // First, fix cursor placement
        if( !gAgent.cameraMouselook() 
                && (GRAB_ACTIVE_CENTER == mMode || GRAB_NONPHYSICAL == mMode))
        {
                llassert( mGrabObject ); 

                if (mGrabObject->isHUDAttachment())
                {
                        // ...move cursor "naturally", as if it had moved when hidden
                        S32 x = mMouseDownX + mAccumDeltaX;
                        S32 y = mMouseDownY + mAccumDeltaY;
                        LLUI::setCursorPositionScreen(x, y);
                }
                else if (mHasMoved)
                {
                        // ...move cursor back to the center of the object
                        LLVector3 grab_point_agent = mGrabObject->getRenderPosition();

                        LLCoordGL gl_point;
                        if (gCamera->projectPosAgentToScreen(grab_point_agent, gl_point))
                        {
                                LLUI::setCursorPositionScreen(gl_point.mX, gl_point.mY);
                        }
                }
                else
                {
                        // ...move cursor back to click position
                        LLUI::setCursorPositionScreen(mMouseDownX, mMouseDownY);
                }

                gViewerWindow->showCursor();
        }

        stopGrab();
        stopSpin();
        mMode = GRAB_INACTIVE;

        mHideBuildHighlight = FALSE;

        mGrabObject = NULL;

        gSelectMgr->updateSelectionCenter();
        gAgent.setPointAt(POINTAT_TARGET_CLEAR);
        gAgent.setLookAt(LOOKAT_TARGET_CLEAR);

        dialog_refresh_all();
}


void LLToolGrab::stopGrab()
{
        // Next, send messages to simulator
        LLMessageSystem *msg = gMessageSystem;
        switch(mMode)
        {
        case GRAB_ACTIVE_CENTER:
        case GRAB_NONPHYSICAL:
        case GRAB_LOCKED:
                msg->newMessageFast(_PREHASH_ObjectDeGrab);
                msg->nextBlockFast(_PREHASH_AgentData);
                msg->addUUIDFast(_PREHASH_AgentID, gAgent.getID());
                msg->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID());
                msg->nextBlockFast(_PREHASH_ObjectData);
                msg->addU32Fast(_PREHASH_LocalID, mGrabObject->mLocalID);
                msg->sendMessage(mGrabObject->getRegion()->getHost());

                mVerticalDragging = FALSE;
                mGrabOffset.clearVec();
                break;

        case GRAB_NOOBJECT:
        case GRAB_INACTIVE:
        default:
                // do nothing
                break;
        }

        mHideBuildHighlight = FALSE;
}


void LLToolGrab::draw()
{ }

void LLToolGrab::render()
{ }

BOOL LLToolGrab::isEditing()
{
        // Can't just compare to null directly due to "smart" pointer.
        LLViewerObject *obj = mGrabObject;
        return (obj != NULL);
}

LLViewerObject* LLToolGrab::getEditingObject()
{
        return mGrabObject;
}


LLVector3d LLToolGrab::getEditingPointGlobal()
{
        return getGrabPointGlobal();
}

LLVector3d LLToolGrab::getGrabPointGlobal()
{
        switch(mMode)
        {
        case GRAB_ACTIVE_CENTER:
        case GRAB_NONPHYSICAL:
        case GRAB_LOCKED:
                return gAgent.getCameraPositionGlobal() + mGrabHiddenOffsetFromCamera;

        case GRAB_NOOBJECT:
        case GRAB_INACTIVE:
        default:
                return gAgent.getPositionGlobal();
        }
}

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