lljoystickbutton.cpp

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#include "llviewerprecompiledheaders.h"

#include "lljoystickbutton.h"

// Library includes
#include "llcoord.h"
#include "indra_constants.h"
#include "llglimmediate.h"

// Project includes
#include "llui.h"
#include "llagent.h"
#include "llviewerimage.h"
#include "llviewerimagelist.h"
#include "llviewerwindow.h"
#include "llmoveview.h"

#include "llglheaders.h"

static LLRegisterWidget<LLJoystickAgentSlide> r1("joystick_slide");
static LLRegisterWidget<LLJoystickAgentTurn> r2("joystick_turn");


const F32 NUDGE_TIME = 0.25f;           // in seconds
const F32 ORBIT_NUDGE_RATE = 0.05f; // fraction of normal speed

//
// Public Methods
//
LLJoystick::LLJoystick(
        const LLString& name, 
        LLRect rect,
        const LLString &default_image,
        const LLString &selected_image,
        EJoystickQuadrant initial_quadrant )
        :       
        LLButton(name, rect, default_image, selected_image, NULL, NULL),
        mInitialQuadrant(initial_quadrant),
        mInitialOffset(0, 0),
        mLastMouse(0, 0),
        mFirstMouse(0, 0),
        mVertSlopNear(0),
        mVertSlopFar(0),
        mHorizSlopNear(0),
        mHorizSlopFar(0),
        mHeldDown(FALSE),
        mHeldDownTimer()
{
        setHeldDownCallback(&LLJoystick::onHeldDown);
        setCallbackUserData(this);
}


void LLJoystick::updateSlop()
{
        mVertSlopNear = getRect().getHeight();
        mVertSlopFar = getRect().getHeight() * 2;

        mHorizSlopNear = getRect().getWidth();
        mHorizSlopFar = getRect().getWidth() * 2;

        // Compute initial mouse offset based on initial quadrant.
        // Place the mouse evenly between the near and far zones.
        switch (mInitialQuadrant)
        {
        case JQ_ORIGIN:
                mInitialOffset.set(0, 0);
                break;

        case JQ_UP:
                mInitialOffset.mX = 0;
                mInitialOffset.mY = (mVertSlopNear + mVertSlopFar) / 2;
                break;

        case JQ_DOWN:
                mInitialOffset.mX = 0;
                mInitialOffset.mY = - (mVertSlopNear + mVertSlopFar) / 2;
                break;

        case JQ_LEFT:
                mInitialOffset.mX = - (mHorizSlopNear + mHorizSlopFar) / 2;
                mInitialOffset.mY = 0;
                break;

        case JQ_RIGHT:
                mInitialOffset.mX = (mHorizSlopNear + mHorizSlopFar) / 2;
                mInitialOffset.mY = 0;
                break;

        default:
                llerrs << "LLJoystick::LLJoystick() - bad switch case" << llendl;
                break;
        }

        return;
}


BOOL LLJoystick::handleMouseDown(S32 x, S32 y, MASK mask)
{
        //llinfos << "joystick mouse down " << x << ", " << y << llendl;

        mLastMouse.set(x, y);
        mFirstMouse.set(x, y);

        mMouseDownTimer.reset();
        return LLButton::handleMouseDown(x, y, mask);
}


BOOL LLJoystick::handleMouseUp(S32 x, S32 y, MASK mask)
{
        // llinfos << "joystick mouse up " << x << ", " << y << llendl;

        if( hasMouseCapture() )
        {
                mLastMouse.set(x, y);
                mHeldDown = FALSE;
                onMouseUp();
        }

        return LLButton::handleMouseUp(x, y, mask);
}


BOOL LLJoystick::handleHover(S32 x, S32 y, MASK mask)
{
        if( hasMouseCapture() )
        {
                mLastMouse.set(x, y);
        }

        return LLButton::handleHover(x, y, mask);
}

F32 LLJoystick::getElapsedHeldDownTime()
{
        if( mHeldDown )
        {
                return getHeldDownTime();
        }
        else
        {
                return 0.f;
        }
}

// static
void LLJoystick::onHeldDown(void *userdata)
{
        LLJoystick *self = (LLJoystick *)userdata;

        // somebody removed this function without checking the
        // build. Removed 2007-03-26.
        //llassert( gViewerWindow->hasMouseCapture( self ) );

        self->mHeldDown = TRUE;
        self->onHeldDown();
}

EJoystickQuadrant LLJoystick::selectQuadrant(LLXMLNodePtr node)
{
        
        EJoystickQuadrant quadrant = JQ_RIGHT;

        if (node->hasAttribute("quadrant"))
        {
                LLString quadrant_name;
                node->getAttributeString("quadrant", quadrant_name);

                quadrant = quadrantFromName(quadrant_name.c_str());
        }
        return quadrant;
}


LLString LLJoystick::nameFromQuadrant(EJoystickQuadrant quadrant)
{
        if (quadrant == JQ_ORIGIN)          return LLString("origin");
        else if (quadrant == JQ_UP)         return LLString("up");
        else if (quadrant == JQ_DOWN)   return LLString("down");
        else if (quadrant == JQ_LEFT)   return LLString("left");
        else if (quadrant == JQ_RIGHT)  return LLString("right");
        else return LLString();
}


EJoystickQuadrant LLJoystick::quadrantFromName(const LLString& sQuadrant)
{
        EJoystickQuadrant quadrant = JQ_RIGHT;

        if (sQuadrant == "origin")
        {
                quadrant = JQ_ORIGIN;
        }
        else if (sQuadrant == "up")
        {
                quadrant = JQ_UP;
        }
        else if (sQuadrant == "down")
        {
                quadrant = JQ_DOWN;
        }
        else if (sQuadrant == "left")
        {
                quadrant = JQ_LEFT;
        }
        else if (sQuadrant == "right")
        {
                quadrant = JQ_RIGHT;
        }

        return quadrant;
}


LLXMLNodePtr LLJoystick::getXML(bool save_children) const
{
        LLXMLNodePtr node = LLUICtrl::getXML();

        node->createChild("halign", TRUE)->setStringValue(LLFontGL::nameFromHAlign(getHAlign()));
        node->createChild("quadrant", TRUE)->setStringValue(nameFromQuadrant(mInitialQuadrant));

        addImageAttributeToXML(node,getImageUnselectedName(),getImageUnselectedID(),"image_unselected");
        addImageAttributeToXML(node,getImageSelectedName(),getImageSelectedID(),"image_selected");
        
        node->createChild("scale_image", TRUE)->setBoolValue(getScaleImage());

        return node;
}



//-------------------------------------------------------------------------------
// LLJoystickAgentTurn
//-------------------------------------------------------------------------------

void LLJoystickAgentTurn::onHeldDown()
{
        F32 time = getElapsedHeldDownTime();
        updateSlop();

        //llinfos << "move forward/backward (and/or turn)" << llendl;

        S32 dx = mLastMouse.mX - mFirstMouse.mX + mInitialOffset.mX;
        S32 dy = mLastMouse.mY - mFirstMouse.mY + mInitialOffset.mY;

        float m = (float) (dx)/abs(dy);
        
        if (m > 1) {
                m = 1;
        }
        else if (m < -1) {
                m = -1;
        }
        gAgent.moveYaw(-LLFloaterMove::getYawRate(time)*m);
        

        // handle forward/back movement
        if (dy > mVertSlopFar)
        {
                // ...if mouse is forward of run region run forward
                gAgent.moveAt(1);
        }
        else if (dy > mVertSlopNear)
        {
                if( time < NUDGE_TIME )
                {
                        gAgent.moveAtNudge(1);
                }
                else
                {
                        // ...else if mouse is forward of walk region walk forward
                        // JC 9/5/2002 - Always run / move quickly.
                        gAgent.moveAt(1);
                }
        }
        else if (dy < -mVertSlopFar)
        {
                // ...else if mouse is behind run region run backward
                gAgent.moveAt(-1);
        }
        else if (dy < -mVertSlopNear)
        {
                if( time < NUDGE_TIME )
                {
                        gAgent.moveAtNudge(-1);
                }
                else
                {
                        // ...else if mouse is behind walk region walk backward
                        // JC 9/5/2002 - Always run / move quickly.
                        gAgent.moveAt(-1);
                }
        }
}

LLView* LLJoystickAgentTurn::fromXML(LLXMLNodePtr node, LLView *parent, LLUICtrlFactory *factory)
{
        LLString name("button");
        node->getAttributeString("name", name);

        LLString        image_unselected;
        if (node->hasAttribute("image_unselected")) node->getAttributeString("image_unselected",image_unselected);
        
        LLString        image_selected;
        if (node->hasAttribute("image_selected")) node->getAttributeString("image_selected",image_selected);

        EJoystickQuadrant quad = JQ_ORIGIN;
        if (node->hasAttribute("quadrant")) quad = selectQuadrant(node);
        
        LLJoystickAgentTurn *button = new LLJoystickAgentTurn(name, 
                LLRect(),
                image_unselected,
                image_selected,
                quad);

        if (node->hasAttribute("halign"))
        {
                LLFontGL::HAlign halign = selectFontHAlign(node);
                button->setHAlign(halign);
        }

        if (node->hasAttribute("scale_image"))
        {
                BOOL    needsScale = FALSE;
                node->getAttributeBOOL("scale_image",needsScale);
                button->setScaleImage( needsScale );
        }

        button->initFromXML(node, parent);
        
        return button;
}



//-------------------------------------------------------------------------------
// LLJoystickAgentSlide
//-------------------------------------------------------------------------------

void LLJoystickAgentSlide::onMouseUp()
{
        F32 time = getElapsedHeldDownTime();
        if( time < NUDGE_TIME )
        {
                switch (mInitialQuadrant)
                {
                case JQ_LEFT:
                        gAgent.moveLeftNudge(1);
                        break;

                case JQ_RIGHT:
                        gAgent.moveLeftNudge(-1);
                        break;

                default:
                        break;
                }
        }
}

void LLJoystickAgentSlide::onHeldDown()
{
        //llinfos << "slide left/right (and/or move forward/backward)" << llendl;

        updateSlop();

        S32 dx = mLastMouse.mX - mFirstMouse.mX + mInitialOffset.mX;
        S32 dy = mLastMouse.mY - mFirstMouse.mY + mInitialOffset.mY;

        // handle left-right sliding
        if (dx > mHorizSlopNear)
        {
                gAgent.moveLeft(-1);
        }
        else if (dx < -mHorizSlopNear)
        {
                gAgent.moveLeft(1);
        }

        // handle forward/back movement
        if (dy > mVertSlopFar)
        {
                // ...if mouse is forward of run region run forward
                gAgent.moveAt(1);
        }
        else if (dy > mVertSlopNear)
        {
                // ...else if mouse is forward of walk region walk forward
                gAgent.moveAtNudge(1);
        }
        else if (dy < -mVertSlopFar)
        {
                // ...else if mouse is behind run region run backward
                gAgent.moveAt(-1);
        }
        else if (dy < -mVertSlopNear)
        {
                // ...else if mouse is behind walk region walk backward
                gAgent.moveAtNudge(-1);
        }
}


// static
LLView* LLJoystickAgentSlide::fromXML(LLXMLNodePtr node, LLView *parent, LLUICtrlFactory *factory)
{
        LLString name("button");
        node->getAttributeString("name", name);

        LLString        image_unselected;
        if (node->hasAttribute("image_unselected")) node->getAttributeString("image_unselected",image_unselected);
        
        LLString        image_selected;
        if (node->hasAttribute("image_selected")) node->getAttributeString("image_selected",image_selected);
        
        
        EJoystickQuadrant quad = JQ_ORIGIN;
        if (node->hasAttribute("quadrant")) quad = selectQuadrant(node);
        
        LLJoystickAgentSlide *button = new LLJoystickAgentSlide(name, 
                LLRect(),
                image_unselected,
                image_selected,
                quad);

        if (node->hasAttribute("halign"))
        {
                LLFontGL::HAlign halign = selectFontHAlign(node);
                button->setHAlign(halign);
        }

        if (node->hasAttribute("scale_image"))
        {
                BOOL    needsScale = FALSE;
                node->getAttributeBOOL("scale_image",needsScale);
                button->setScaleImage( needsScale );
        }
        
        button->initFromXML(node, parent);
        
        return button;
}


//-------------------------------------------------------------------------------
// LLJoystickCameraRotate
//-------------------------------------------------------------------------------

LLJoystickCameraRotate::LLJoystickCameraRotate(const LLString& name, LLRect rect, const LLString &out_img, const LLString &in_img)
        : 
        LLJoystick(name, rect, out_img, in_img, JQ_ORIGIN),
        mInLeft( FALSE ),
        mInTop( FALSE ),
        mInRight( FALSE ),
        mInBottom( FALSE )
{ }


void LLJoystickCameraRotate::updateSlop()
{
        // do the initial offset calculation based on mousedown location

        // small fixed slop region
        mVertSlopNear = 16;
        mVertSlopFar = 32;

        mHorizSlopNear = 16;
        mHorizSlopFar = 32;

        return;
}


BOOL LLJoystickCameraRotate::handleMouseDown(S32 x, S32 y, MASK mask)
{
        updateSlop();

        // Set initial offset based on initial click location
        S32 horiz_center = getRect().getWidth() / 2;
        S32 vert_center = getRect().getHeight() / 2;

        S32 dx = x - horiz_center;
        S32 dy = y - vert_center;

        if (dy > dx && dy > -dx)
        {
                // top
                mInitialOffset.mX = 0;
                mInitialOffset.mY = (mVertSlopNear + mVertSlopFar) / 2;
                mInitialQuadrant = JQ_UP;
        }
        else if (dy > dx && dy <= -dx)
        {
                // left
                mInitialOffset.mX = - (mHorizSlopNear + mHorizSlopFar) / 2;
                mInitialOffset.mY = 0;
                mInitialQuadrant = JQ_LEFT;
        }
        else if (dy <= dx && dy <= -dx)
        {
                // bottom
                mInitialOffset.mX = 0;
                mInitialOffset.mY = - (mVertSlopNear + mVertSlopFar) / 2;
                mInitialQuadrant = JQ_DOWN;
        }
        else
        {
                // right
                mInitialOffset.mX = (mHorizSlopNear + mHorizSlopFar) / 2;
                mInitialOffset.mY = 0;
                mInitialQuadrant = JQ_RIGHT;
        }

        return LLJoystick::handleMouseDown(x, y, mask);
}


void LLJoystickCameraRotate::onHeldDown()
{
        updateSlop();

        S32 dx = mLastMouse.mX - mFirstMouse.mX + mInitialOffset.mX;
        S32 dy = mLastMouse.mY - mFirstMouse.mY + mInitialOffset.mY;

        // left-right rotation
        if (dx > mHorizSlopNear)
        {
                gAgent.unlockView();
                gAgent.setOrbitLeftKey(getOrbitRate());
        }
        else if (dx < -mHorizSlopNear)
        {
                gAgent.unlockView();
                gAgent.setOrbitRightKey(getOrbitRate());
        }

        // over/under rotation
        if (dy > mVertSlopNear)
        {
                gAgent.unlockView();
                gAgent.setOrbitUpKey(getOrbitRate());
        }
        else if (dy < -mVertSlopNear)
        {
                gAgent.unlockView();
                gAgent.setOrbitDownKey(getOrbitRate());
        }
}

F32 LLJoystickCameraRotate::getOrbitRate()
{
        F32 time = getElapsedHeldDownTime();
        if( time < NUDGE_TIME )
        {
                F32 rate = ORBIT_NUDGE_RATE + time * (1 - ORBIT_NUDGE_RATE)/ NUDGE_TIME;
                //llinfos << rate << llendl;
                return rate;
        }
        else
        {
                return 1;
        }
}


// Only used for drawing
void LLJoystickCameraRotate::setToggleState( BOOL left, BOOL top, BOOL right, BOOL bottom )
{
        mInLeft = left;
        mInTop = top;
        mInRight = right;
        mInBottom = bottom;
}

void LLJoystickCameraRotate::draw()
{
        LLGLSUIDefault gls_ui;

        getImageUnselected()->draw( 0, 0 );

        if( mInTop )
        {
                drawRotatedImage( getImageSelected()->getImage(), 0 );
        }

        if( mInRight )
        {
                drawRotatedImage( getImageSelected()->getImage(), 1 );
        }

        if( mInBottom )
        {
                drawRotatedImage( getImageSelected()->getImage(), 2 );
        }

        if( mInLeft )
        {
                drawRotatedImage( getImageSelected()->getImage(), 3 );
        }

        if (sDebugRects)
        {
                drawDebugRect();
        }
}

// Draws image rotated by multiples of 90 degrees
void LLJoystickCameraRotate::drawRotatedImage( const LLImageGL* image, S32 rotations )
{
        S32 width = image->getWidth();
        S32 height = image->getHeight();

        F32 uv[][2] = 
        {
                { 1.f, 1.f },
                { 0.f, 1.f },
                { 0.f, 0.f },
                { 1.f, 0.f }
        };

        image->bind();

        gGL.color4fv(UI_VERTEX_COLOR.mV);
        
        gGL.begin(LLVertexBuffer::QUADS);
        {
                gGL.texCoord2fv( uv[ (rotations + 0) % 4]);
                gGL.vertex2i(width, height );

                gGL.texCoord2fv( uv[ (rotations + 1) % 4]);
                gGL.vertex2i(0, height );

                gGL.texCoord2fv( uv[ (rotations + 2) % 4]);
                gGL.vertex2i(0, 0);

                gGL.texCoord2fv( uv[ (rotations + 3) % 4]);
                gGL.vertex2i(width, 0);
        }
        gGL.end();
}



//-------------------------------------------------------------------------------
// LLJoystickCameraTrack
//-------------------------------------------------------------------------------


void LLJoystickCameraTrack::onHeldDown()
{
        updateSlop();

        S32 dx = mLastMouse.mX - mFirstMouse.mX + mInitialOffset.mX;
        S32 dy = mLastMouse.mY - mFirstMouse.mY + mInitialOffset.mY;

        if (dx > mVertSlopNear)
        {
                gAgent.unlockView();
                gAgent.setPanRightKey(getOrbitRate());
        }
        else if (dx < -mVertSlopNear)
        {
                gAgent.unlockView();
                gAgent.setPanLeftKey(getOrbitRate());
        }

        // over/under rotation
        if (dy > mVertSlopNear)
        {
                gAgent.unlockView();
                gAgent.setPanUpKey(getOrbitRate());
        }
        else if (dy < -mVertSlopNear)
        {
                gAgent.unlockView();
                gAgent.setPanDownKey(getOrbitRate());
        }
}



//-------------------------------------------------------------------------------
// LLJoystickCameraZoom
//-------------------------------------------------------------------------------

LLJoystickCameraZoom::LLJoystickCameraZoom(const LLString& name, LLRect rect, const LLString &out_img, const LLString &plus_in_img, const LLString &minus_in_img)
        : 
        LLJoystick(name, rect, out_img, "", JQ_ORIGIN),
        mInTop( FALSE ),
        mInBottom( FALSE )
{
        mPlusInImage = LLUIImageList::getInstance()->getUIImage(plus_in_img);
        mMinusInImage = LLUIImageList::getInstance()->getUIImage(minus_in_img);
}


BOOL LLJoystickCameraZoom::handleMouseDown(S32 x, S32 y, MASK mask)
{
        BOOL handled = LLJoystick::handleMouseDown(x, y, mask);

        if( handled )
        {
                if (mFirstMouse.mY > getRect().getHeight() / 2)
                {
                        mInitialQuadrant = JQ_UP;
                }
                else
                {
                        mInitialQuadrant = JQ_DOWN;
                }
        }
        return handled;
}


void LLJoystickCameraZoom::onHeldDown()
{
        updateSlop();

        const F32 FAST_RATE = 2.5f; // two and a half times the normal rate

        S32 dy = mLastMouse.mY - mFirstMouse.mY + mInitialOffset.mY;

        if (dy > mVertSlopFar)
        {
                // Zoom in fast
                gAgent.unlockView();
                gAgent.setOrbitInKey(FAST_RATE);
        }
        else if (dy > mVertSlopNear)
        {
                // Zoom in slow
                gAgent.unlockView();
                gAgent.setOrbitInKey(getOrbitRate());
        }
        else if (dy < -mVertSlopFar)
        {
                // Zoom out fast
                gAgent.unlockView();
                gAgent.setOrbitOutKey(FAST_RATE);
        }
        else if (dy < -mVertSlopNear)
        {
                // Zoom out slow
                gAgent.unlockView();
                gAgent.setOrbitOutKey(getOrbitRate());
        }
}

// Only used for drawing
void LLJoystickCameraZoom::setToggleState( BOOL top, BOOL bottom )
{
        mInTop = top;
        mInBottom = bottom;
}

void LLJoystickCameraZoom::draw()
{
        if( mInTop )
        {
                mPlusInImage->draw(0,0);
        }
        else
        if( mInBottom )
        {
                mMinusInImage->draw(0,0);
        }
        else
        {
                getImageUnselected()->draw( 0, 0 );
        }

        if (sDebugRects)
        {
                drawDebugRect();
        }
}

void LLJoystickCameraZoom::updateSlop()
{
        mVertSlopNear = getRect().getHeight() / 4;
        mVertSlopFar = getRect().getHeight() / 2;

        mHorizSlopNear = getRect().getWidth() / 4;
        mHorizSlopFar = getRect().getWidth() / 2;

        // Compute initial mouse offset based on initial quadrant.
        // Place the mouse evenly between the near and far zones.
        switch (mInitialQuadrant)
        {
        case JQ_ORIGIN:
                mInitialOffset.set(0, 0);
                break;

        case JQ_UP:
                mInitialOffset.mX = 0;
                mInitialOffset.mY = (mVertSlopNear + mVertSlopFar) / 2;
                break;

        case JQ_DOWN:
                mInitialOffset.mX = 0;
                mInitialOffset.mY = - (mVertSlopNear + mVertSlopFar) / 2;
                break;

        case JQ_LEFT:
                mInitialOffset.mX = - (mHorizSlopNear + mHorizSlopFar) / 2;
                mInitialOffset.mY = 0;
                break;

        case JQ_RIGHT:
                mInitialOffset.mX = (mHorizSlopNear + mHorizSlopFar) / 2;
                mInitialOffset.mY = 0;
                break;

        default:
                llerrs << "LLJoystick::LLJoystick() - bad switch case" << llendl;
                break;
        }

        return;
}


F32 LLJoystickCameraZoom::getOrbitRate()
{
        F32 time = getElapsedHeldDownTime();
        if( time < NUDGE_TIME )
        {
                F32 rate = ORBIT_NUDGE_RATE + time * (1 - ORBIT_NUDGE_RATE)/ NUDGE_TIME;
//              llinfos << "rate " << rate << " time " << time << llendl;
                return rate;
        }
        else
        {
                return 1;
        }
}

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