usbloadergx/source/GUI/gui_element.cpp

/****************************************************************************
 * libwiigui
 *
 * Tantric 2009
 *
 * gui_element.cpp
 *
 * GUI class definitions
 ***************************************************************************/

#include "gui.h"

/**
 * Constructor for the Object class.
 */
//mutex_t GuiElement::mutex = LWP_MUTEX_NULL;
mutex_t GuiElement::_lock_mutex = LWP_MUTEX_NULL;
GuiElement::GuiElement()
{
    xoffset = 0;
    yoffset = 0;
    zoffset = 0;
    xmin = 0;
    xmax = 0;
    ymin = 0;
    ymax = 0;
    width = 0;
    height = 0;
    alpha = 255;
    scale = 1;
    state = STATE_DEFAULT;
    stateChan = -1;
    trigger[0] = NULL;
    trigger[1] = NULL;
    trigger[2] = NULL;
    trigger[3] = NULL;
    trigger[4] = NULL;
    trigger[5] = NULL;
    parentElement = NULL;
    rumble = true;
    selectable = false;
    clickable = false;
    holdable = false;
    visible = true;
    focus = -1; // cannot be focused
    updateCB = NULL;
    yoffsetDyn = 0;
    xoffsetDyn = 0;
    yoffsetDynFloat = 0;
    alphaDyn = -1;
    scaleDyn = 1;
    effects = 0;
    effectAmount = 0;
    effectTarget = 0;
    effectsOver = 0;
    effectAmountOver = 0;
    effectTargetOver = 0;
    frequency = 0.0f;
    changervar = 0;
    degree = -90.0f;
    circleamount = 360.0f;
    Radius = 150;
    angleDyn = 0.0f;
    anglespeed = 0.0f;

    // default alignment - align to top left
    alignmentVert = ALIGN_TOP;
    alignmentHor = ALIGN_LEFT;
    //  if(mutex == LWP_MUTEX_NULL) LWP_MutexInit(&mutex, true);
    if (_lock_mutex == LWP_MUTEX_NULL) LWP_MutexInit(&_lock_mutex, true);
    _lock_thread = LWP_THREAD_NULL;
    _lock_count = 0;
    _lock_queue = LWP_TQUEUE_NULL;

}

/**
 * Destructor for the GuiElement class.
 */
GuiElement::~GuiElement()
{
    //  LWP_MutexDestroy(mutex);
}

void GuiElement::SetParent(GuiElement * e)
{
    LOCK( this );
    parentElement = e;
}

GuiElement * GuiElement::GetParent()
{
    return parentElement;
}
/**
 * Get the left position of the GuiElement.
 * @see SetLeft()
 * @return Left position in pixel.
 */
int GuiElement::GetLeft()
{
    int x = 0;
    int pWidth = 0;
    int pLeft = 0;

    if (parentElement)
    {
        pWidth = parentElement->GetWidth();
        pLeft = parentElement->GetLeft();
    }

    if (effects & (EFFECT_SLIDE_IN | EFFECT_SLIDE_OUT | EFFECT_GOROUND | EFFECT_ROCK_VERTICLE)) pLeft += xoffsetDyn;

    switch (alignmentHor)
    {
        case ALIGN_LEFT:
            x = pLeft;
            break;
        case ALIGN_CENTRE:
            x = pLeft + (pWidth / 2) - (width / 2);
            break;
        case ALIGN_RIGHT:
            x = pLeft + pWidth - width;
            break;
    }
    return x + xoffset;
}

/**
 * Get the top position of the GuiElement.
 * @see SetTop()
 * @return Top position in pixel.
 */
int GuiElement::GetTop()
{
    int y = 0;
    int pHeight = 0;
    int pTop = 0;

    if (parentElement)
    {
        pHeight = parentElement->GetHeight();
        pTop = parentElement->GetTop();
    }

    if (effects & (EFFECT_SLIDE_IN | EFFECT_SLIDE_OUT | EFFECT_GOROUND | EFFECT_ROCK_VERTICLE)) pTop += yoffsetDyn;

    switch (alignmentVert)
    {
        case ALIGN_TOP:
            y = pTop;
            break;
        case ALIGN_MIDDLE:
            y = pTop + (pHeight / 2) - (height / 2);
            break;
        case ALIGN_BOTTOM:
            y = pTop + pHeight - height;
            break;
    }
    return y + yoffset;
}

int GuiElement::GetRelLeft()
{
    GuiElement *tmp = parentElement;
    parentElement = NULL;
    int pos = GetLeft();
    parentElement = tmp;

    return pos;
}

int GuiElement::GetRelTop()
{
    GuiElement *tmp = parentElement;
    parentElement = NULL;
    int pos = GetTop();
    parentElement = tmp;

    return pos;
}

void GuiElement::SetMinX(int x)
{
    LOCK( this );
    xmin = x;
}

int GuiElement::GetMinX()
{
    return xmin;
}

void GuiElement::SetMaxX(int x)
{
    LOCK( this );
    xmax = x;
}

int GuiElement::GetMaxX()
{
    return xmax;
}

void GuiElement::SetMinY(int y)
{
    LOCK( this );
    ymin = y;
}

int GuiElement::GetMinY()
{
    return ymin;
}

void GuiElement::SetMaxY(int y)
{
    LOCK( this );
    ymax = y;
}

int GuiElement::GetMaxY()
{
    return ymax;
}

/**
 * Get the width of the GuiElement.
 * @see SetWidth()
 * @return Width of the GuiElement.
 */
int GuiElement::GetWidth()
{
    return width;
}

/**
 * Get the height of the GuiElement.
 * @see SetHeight()
 * @return Height of the GuiElement.
 */
int GuiElement::GetHeight()
{
    return height;
}

/**
 * Set the width and height of the GuiElement.
 * @param[in] Width Width in pixel.
 * @param[in] Height Height in pixel.
 * @see SetWidth()
 * @see SetHeight()
 */
void GuiElement::SetSize(int w, int h)
{
    LOCK( this );

    width = w;
    height = h;
}

/**
 * Get visible.
 * @see SetVisible()
 * @return true if visible, false otherwise.
 */
bool GuiElement::IsVisible()
{
    return visible;
}

/**
 * Set visible.
 * @param[in] Visible Set to true to show GuiElement.
 * @see IsVisible()
 */
void GuiElement::SetVisible(bool v)
{
    LOCK( this );
    visible = v;
}

void GuiElement::SetAlpha(int a)
{
    LOCK( this );
    alpha = a;
}

int GuiElement::GetAlpha()
{
    int a;

    if (alphaDyn >= 0)
        a = alphaDyn;
    else a = alpha;

    if (parentElement) a *= parentElement->GetAlpha() / 255.0;

    return a;
}

float GuiElement::GetAngleDyn()
{
    float a = 0.0;

    if (angleDyn) a = angleDyn;

    if (parentElement && !angleDyn) a = parentElement->GetAngleDyn();

    return a;
}

void GuiElement::SetScale(float s)
{
    LOCK( this );
    scale = s;
}

float GuiElement::GetScale()
{
    float s = scale * scaleDyn;

    if (parentElement) s *= parentElement->GetScale();

    return s;
}

int GuiElement::GetState()
{
    return state;
}

int GuiElement::GetStateChan()
{
    return stateChan;
}

void GuiElement::SetState(int s, int c)
{
    LOCK( this );
    state = s;
    stateChan = c;
}

void GuiElement::ResetState()
{
    LOCK( this );
    if (state != STATE_DISABLED)
    {
        state = STATE_DEFAULT;
        stateChan = -1;
    }
}

void GuiElement::SetClickable(bool c)
{
    LOCK( this );
    clickable = c;
}

void GuiElement::SetSelectable(bool s)
{
    LOCK( this );
    selectable = s;
}

void GuiElement::SetHoldable(bool d)
{
    LOCK( this );
    holdable = d;
}

bool GuiElement::IsSelectable()
{
    if (state == STATE_DISABLED || state == STATE_CLICKED)
        return false;
    else return selectable;
}

bool GuiElement::IsClickable()
{
    if (state == STATE_DISABLED || state == STATE_CLICKED || state == STATE_HELD)
        return false;
    else return clickable;
}

bool GuiElement::IsHoldable()
{
    if (state == STATE_DISABLED)
        return false;
    else return holdable;
}

void GuiElement::SetFocus(int f)
{
    LOCK( this );
    focus = f;
}

int GuiElement::IsFocused()
{
    return focus;
}

void GuiElement::SetTrigger(GuiTrigger * t)
{
    LOCK( this );
    if (!trigger[0])
        trigger[0] = t;
    else if (!trigger[1])
        trigger[1] = t;
    else if (!trigger[2])
        trigger[2] = t;
    else if (!trigger[3])
        trigger[3] = t;
    else if (!trigger[4])
        trigger[4] = t;
    else if (!trigger[5])
        trigger[5] = t;
    else // both were assigned, so we'll just overwrite the first one
    trigger[0] = t;
}

void GuiElement::SetTrigger(u8 i, GuiTrigger * t)
{
    LOCK( this );
    trigger[i] = t;
}

void GuiElement::RemoveTrigger(u8 i)
{
    LOCK( this );
    trigger[i] = NULL;
}

bool GuiElement::Rumble()
{
    return rumble;
}

void GuiElement::SetRumble(bool r)
{
    LOCK( this );
    rumble = r;
}

int GuiElement::GetEffect()
{
    LOCK( this );
    return effects;
}

int GuiElement::GetEffectOnOver()
{
    LOCK( this );
    return effectsOver;
}

float GuiElement::GetFrequency()
{
    LOCK( this );
    return frequency;
}

void GuiElement::SetEffect(int eff, int speed, f32 circles, int r, f32 startdegree, f32 anglespeedset, int center_x,
        int center_y)
{

    if (eff & EFFECT_GOROUND)
    {
        xoffsetDyn = 0; //!position of circle in x
        yoffsetDyn = 0; //!position of circle in y
        Radius = r; //!radius of the circle
        degree = startdegree; //!for example -90 (<28>) to start at top of circle
        circleamount = circles; //!circleamoutn in degrees for example 360 for 1 circle
        angleDyn = 0.0f; //!this is used by the code to calc the angle
        anglespeed = anglespeedset; //!This is anglespeed depending on circle speed 1 is same speed and 0.5 half speed
        temp_xoffset = center_x; //!position of center in x
        temp_yoffset = center_y; //!position of center in y
    }
    effects |= eff;
    effectAmount = speed; //!Circlespeed
}

void GuiElement::SetEffect(int eff, int amount, int target)
{
    LOCK( this );
    if (eff & EFFECT_SLIDE_IN)
    {
        // these calculations overcompensate a little
        if (eff & EFFECT_SLIDE_TOP)
            yoffsetDyn = -screenheight;
        else if (eff & EFFECT_SLIDE_LEFT)
            xoffsetDyn = -screenwidth;
        else if (eff & EFFECT_SLIDE_BOTTOM)
            yoffsetDyn = screenheight;
        else if (eff & EFFECT_SLIDE_RIGHT) xoffsetDyn = screenwidth;
    }

    if (eff & EFFECT_FADE && amount > 0)
    {
        alphaDyn = 0;
    }
    else if (eff & EFFECT_FADE && amount < 0)
    {
        alphaDyn = alpha;

    }
    else if (eff & EFFECT_ROCK_VERTICLE)
    {
        changervar = 0;
        yoffsetDyn = 0;
        yoffsetDynFloat = 0.0;
    }

    effects |= eff;
    effectAmount = amount;
    effectTarget = target;
}

void GuiElement::SetEffectOnOver(int eff, int amount, int target)
{
    LOCK( this );
    effectsOver |= eff;
    effectAmountOver = amount;
    effectTargetOver = target;
}

void GuiElement::SetEffectGrow()
{
    SetEffectOnOver(EFFECT_SCALE, 4, 110);
}

void GuiElement::StopEffect()
{
    xoffsetDyn = 0;
    yoffsetDyn = 0;
    effects = 0;
    effectsOver = 0;
    effectAmount = 0;
    effectAmountOver = 0;
    effectTarget = 0;
    effectTargetOver = 0;
    scaleDyn = 1;
    frequency = 0.0f;
    changervar = 0;
    //angleDyn = 0.0f;
    anglespeed = 0.0f;
}

void GuiElement::UpdateEffects()
{
    LOCK( this );

    if (effects & (EFFECT_SLIDE_IN | EFFECT_SLIDE_OUT | EFFECT_GOROUND))
    {
        if (effects & EFFECT_SLIDE_IN)
        {
            if (effects & EFFECT_SLIDE_LEFT)
            {
                xoffsetDyn += effectAmount;

                if (xoffsetDyn >= 0)
                {
                    xoffsetDyn = 0;
                    effects = 0;
                }
            }
            else if (effects & EFFECT_SLIDE_RIGHT)
            {
                xoffsetDyn -= effectAmount;

                if (xoffsetDyn <= 0)
                {
                    xoffsetDyn = 0;
                    effects = 0;
                }
            }
            else if (effects & EFFECT_SLIDE_TOP)
            {
                yoffsetDyn += effectAmount;

                if (yoffsetDyn >= 0)
                {
                    yoffsetDyn = 0;
                    effects = 0;
                }
            }
            else if (effects & EFFECT_SLIDE_BOTTOM)
            {
                yoffsetDyn -= effectAmount;

                if (yoffsetDyn <= 0)
                {
                    yoffsetDyn = 0;
                    effects = 0;
                }
            }
        }
        else
        {
            if (effects & EFFECT_SLIDE_LEFT)
            {
                xoffsetDyn -= effectAmount;

                if (xoffsetDyn <= -screenwidth) effects = 0; // shut off effect
            }
            else if (effects & EFFECT_SLIDE_RIGHT)
            {
                xoffsetDyn += effectAmount;

                if (xoffsetDyn >= screenwidth) effects = 0; // shut off effect
            }
            else if (effects & EFFECT_SLIDE_TOP)
            {
                yoffsetDyn -= effectAmount;

                if (yoffsetDyn <= -screenheight) effects = 0; // shut off effect
            }
            else if (effects & EFFECT_SLIDE_BOTTOM)
            {
                yoffsetDyn += effectAmount;

                if (yoffsetDyn >= screenheight) effects = 0; // shut off effect
            }
        }
    }

    if (effects & EFFECT_GOROUND)
    {
        //!< check out gui.h for info
        xoffset = temp_xoffset;
        yoffset = temp_yoffset;
        if (fabs(frequency) < circleamount)
        {
            angleDyn = (frequency + degree + 90.0f) * anglespeed;
            xoffsetDyn = (int) lround(((f32) Radius) * cos((frequency + degree) * PI / 180.0f));
            yoffsetDyn = (int) lround(((f32) Radius) * sin((frequency + degree) * PI / 180.0f));
            frequency += ((f32) effectAmount) * 0.01f;
        }
        else
        {
            f32 temp_frequency = ((effectAmount < 0) ? -1.0f : 1.0f) * circleamount;
            angleDyn = (temp_frequency + degree + 90.0f) * anglespeed;
            xoffsetDyn = (int) lround(((f32) Radius) * cos((temp_frequency + degree) * PI / 180.0f));
            yoffsetDyn = (int) lround(((f32) Radius) * sin((temp_frequency + degree) * PI / 180.0f));
            xoffset += xoffsetDyn;
            yoffset += yoffsetDyn;
            effects ^= EFFECT_GOROUND;
            frequency = 0.0f;
        }
    }

    if (effects & EFFECT_ROCK_VERTICLE)
    {
        //move up to 10pixel above 0
        if (changervar == 0 && yoffsetDynFloat < 11.0)
        {
            yoffsetDynFloat += (effectAmount * 0.01);
        }
        else if (yoffsetDynFloat > 10.0)
        {
            changervar = 1;
        }
        //move down till 10pixel under 0
        if (changervar == 1 && yoffsetDynFloat > -11.0)
        {
            yoffsetDynFloat -= (effectAmount * 0.01);
        }
        else if (yoffsetDynFloat < -10.0)
        {
            changervar = 0;
        }
        yoffsetDyn = (int) (yoffsetDynFloat);
    }

    if (effects & EFFECT_FADE)
    {
        alphaDyn += effectAmount;

        if (effectAmount < 0 && alphaDyn <= 0)
        {
            alphaDyn = 0;
            effects = 0; // shut off effect
        }
        else if (effectAmount > 0 && alphaDyn >= alpha)
        {
            alphaDyn = alpha;
            effects = 0; // shut off effect
        }
    }
    if (effects & EFFECT_SCALE)
    {
        scaleDyn += effectAmount / 100.0;

        if ((effectAmount < 0 && scaleDyn <= effectTarget / 100.0) || (effectAmount > 0 && scaleDyn >= effectTarget
                / 100.0))
        {
            scaleDyn = effectTarget / 100.0;
            effects = 0; // shut off effect
        }
    }
    if (effects & EFFECT_PULSE)
    {
        int percent = 10; //go down from target by this

        if ((scaleDyn <= (effectTarget * 0.01)) && (!changervar))
        {
            scaleDyn += (effectAmount * 0.001);
        }
        else if (scaleDyn > (effectTarget * 0.01))
        {
            changervar = 1;
        }
        if ((scaleDyn >= ((effectTarget - percent) * 0.01)) && (changervar))
        {
            scaleDyn -= (effectAmount * 0.001);
        }
        else if (scaleDyn < ((effectTarget - percent) * 0.01))
        {
            changervar = 0;
        }
    }
}

void GuiElement::Update(GuiTrigger * t)
{
    LOCK( this );
    if (updateCB) updateCB(this);
}

void GuiElement::SetUpdateCallback(UpdateCallback u)
{
    LOCK( this );
    updateCB = u;
}

void GuiElement::SetPosition(int xoff, int yoff, int zoff)
{
    LOCK( this );
    xoffset = xoff;
    yoffset = yoff;
    zoffset = zoff;
}

void GuiElement::SetAlignment(int hor, int vert)
{
    LOCK( this );
    alignmentHor = hor;
    alignmentVert = vert;
}

int GuiElement::GetSelected()
{
    return -1;
}

/**
 * Draw an element on screen.
 */
void GuiElement::Draw()
{
}

/**
 * Draw Tooltips on screen.
 */
void GuiElement::DrawTooltip()
{
}

/**
 * Check if a position is inside the GuiElement.
 * @param[in] x X position in pixel.
 * @param[in] y Y position in pixel.
 */
bool GuiElement::IsInside(int x, int y)
{
    if (x > this->GetLeft() && x < (this->GetLeft() + width) && y > this->GetTop() && y < (this->GetTop() + height)) return true;
    return false;
}
void GuiElement::LockElement()
{
    //  LWP_MutexLock(mutex);
    for (;;) // loop while element is locked by self
    {
        LWP_MutexLock(_lock_mutex);

        if (_lock_thread == LWP_THREAD_NULL) // element is not locked
        {
            _lock_thread = LWP_GetSelf(); // mark as locked
            _lock_count = 1; // set count of lock to 1
            LWP_MutexUnlock(_lock_mutex);
            return;
        }
        else if (_lock_thread == LWP_GetSelf()) // thread is locked by my self
        {
            _lock_count++; // inc count of locks;
            LWP_MutexUnlock(_lock_mutex);
            return;
        }
        else // otherwise the element is locked by an other thread
        {
            if (_lock_queue == LWP_TQUEUE_NULL) // no queue - meens it is the first access to the locked element
            LWP_InitQueue(&_lock_queue); // init queue
            LWP_MutexUnlock(_lock_mutex);
            LWP_ThreadSleep(_lock_queue); // and sleep
            // try lock again;
        }
    }
}
void GuiElement::UnlockElement()
{
    //  LWP_MutexUnlock(mutex);
    LWP_MutexLock(_lock_mutex);
    // only the thread was locked this element, can call unlock
    if (_lock_thread == LWP_GetSelf()) // but we check it here <20> safe is safe
    {
        if (--_lock_count == 0) // dec count of locks and check if it last lock;
        {
            _lock_thread = LWP_THREAD_NULL; // mark as unlocked
            if (_lock_queue != LWP_TQUEUE_NULL) // has a queue
            {
                LWP_CloseQueue(_lock_queue); // close the queue and wake all waited threads
                _lock_queue = LWP_TQUEUE_NULL;
            }
        }
    }
    LWP_MutexUnlock(_lock_mutex);
}

SimpleLock::SimpleLock(GuiElement *e) :
    element(e)
{
    element->LockElement();
}
SimpleLock::~SimpleLock()
{
    element->UnlockElement();
}