/* *   Copyright (C) 2005 by Ian Monroe *   Released under GPL 2 or later, see COPYING */#include "equalizercanvasview.h"#include <qlabel.h>#include <qcanvas.h>#include <qpen.h>#include <dcopclient.h>#include <kapplication.h>#include <kdebug.h>#include <klocale.h>#include <kmessagebox.h>EqualizerCanvasView::EqualizerCanvasView(QWidget *parent = 0, const char *name = 0)    : QCanvasView(parent, name){    m_pen.setWidth(5);    m_circleList = new QPtrList<EqualizerCircle>();}//called after setCanvasvoidEqualizerCanvasView::init(){//     QCanvasLine* line = new QCanvasLine(this->canvas());//     line->setPoints(0,100,400,100);//     line->setPen(QPen(m_pen));//     line->setBrush(QBrush(Qt::black));    QCanvasLine* lineLeft = makeLine(QPoint(0,canvas()->height()/2)                ,QPoint(canvas()->width()/2,canvas()->height()/2));    QCanvasLine* lineRight= makeLine(QPoint(canvas()->width()/2,canvas()->height()/2)                ,QPoint(canvas()->width(),canvas()->height()/2));    EqualizerCircle* circleMid = new EqualizerCircle(canvas()->width()/2              ,canvas()->height()/2              ,canvas()              ,lineLeft              ,lineRight              ,m_circleList);    EqualizerCircle* circleLeft = new EqualizerCircle(0,100,this->canvas(),NULL,lineLeft,m_circleList);    EqualizerCircle* circleRight =  new EqualizerCircle(400,100,this->canvas(),lineRight,NULL,m_circleList);    circleLeft->show();    circleRight->show();    circleMid->show();//    line->show();    this->canvas()->update();}voidEqualizerCanvasView::contentsMousePressEvent(QMouseEvent *event){    QCanvasItemList items = canvas()->collisions(event->pos());    if (items.empty())        m_selectedItem = 0;    else        m_selectedItem = *(items.begin());}voidEqualizerCanvasView::contentsMouseDoubleClickEvent(QMouseEvent *event){    if (event->button() == LeftButton && m_selectedItem            && m_selectedItem->rtti() == QCanvasLine::RTTI)    {        QCanvasLine* line = (QCanvasLine*) m_selectedItem;        int y = getY(event->x());        EqualizerCircle* circle = new EqualizerCircle(event->x(), y              ,canvas()              ,makeLine(line->startPoint(),QPoint(event->x(),event->y()))              ,makeLine(QPoint(event->x(),event->y()),line->endPoint())              ,m_circleList);        //kdDebug() << event->x() << 'x' << y << " cursor at " << event->x() << 'x' << event->y() << endl;        circle->show();        canvas()->update();        m_selectedItem=0;        delete line;        canvas()->update();    }}voidEqualizerCanvasView::contentsMouseMoveEvent(QMouseEvent *event){    if ((event->state() & LeftButton) && m_selectedItem ) {      //  kdDebug() << "dragging " << m_selectedItem->rtti() << endl;        if (m_selectedItem->rtti() == QCanvasEllipse::RTTI)        {            EqualizerCircle* circle = (EqualizerCircle*) m_selectedItem;            circle->setLocation(event->pos());      //      kdDebug() << "dragged" <<endl;        }    }}voidEqualizerCanvasView::contentsMouseReleaseEvent(QMouseEvent */*event*/){    if (m_selectedItem && m_selectedItem->rtti() == QCanvasEllipse::RTTI)    {        emit eqChanged();    }}/** * m =(y1-y2)/(x1-x2) * b = m*x1 - y1 * y = m*xCoord -b */intEqualizerCanvasView::getY(int xCoord){//     int y1 = line->startPoint().y();//     int y2 = line->endPoint().y();//     int x1 = line->startPoint().x();//     int x2 = line->endPoint().x();//     double slope = double(y1-y2) / double(x1-x2);//     kdDebug() << slope << "= (" << y1 << " - " << y2 << ")/(" << x1  << " - " << x2 << ')' << endl;//     double b = slope*double(x1 - y1);//     kdDebug() << b << " = " << slope <<" * "<< x1 << " - " << y1 << endl;//     double y = double(xCoord)*slope - b;//     kdDebug() << y << " = " << xCoord << '*' << slope << " - " << b << endl;    //QPointArray* yAxis = new QPointArray(canvas->height());    //yAxis->makeEllipse(xCoord, canvas()->height()/2,1,canvas->height());    //canvas()->collisions(yAxis,0,false);    //delete yAxis;    QMemArray<int> collidedPoints(20);    unsigned int collisionNum = 0;    for(int i=0; i<canvas()->height();i++)    {        QCanvasItemList list = canvas()->collisions(QPoint(xCoord,i));        if( ! list.isEmpty())        {            if(collidedPoints.size() <= collisionNum)                collidedPoints.resize(collidedPoints.size()+100);//for the steep slops            collidedPoints[collisionNum] = i;            collisionNum++;        }    }    collisionNum--;    return collidedPoints[collisionNum] - collisionNum/2;}QCanvasLine*EqualizerCanvasView::makeLine(QPoint startPoint, QPoint endPoint){    QCanvasLine* line = new QCanvasLine(canvas());    line->setPoints(startPoint.x(),                   startPoint.y(),                   endPoint.x(),                   endPoint.y());    line->setZ(-50);    line->setPen(QPen(m_pen));    line->show();    return line;}QValueList<int>EqualizerCanvasView::currentSettings(){    int step = canvas()->width()/10;    int i;    QValueList<int> ret;    ret << (int)(m_circleList->first()->y() - 100)*-1;    for(i=1; i<9; i++)        ret << (getY(i*step) - 100)*-1;    ret << (int)(m_circleList->last()->y() - 100)*-1;//    kdDebug() << "sending " << ret << endl;    return ret;}////////////////////////EqualizerCircle//////////////////////EqualizerCircle::EqualizerCircle(int x, int y, QCanvas *canvas, QCanvasLine* line1, QCanvasLine* line2,QPtrList<EqualizerCircle>* circleList ): QCanvasEllipse(15, 15, canvas){    m_line1 = line1;    m_line2 = line2;    setBrush(QBrush(Qt::blue));    move(x,y);    m_circleList = circleList;    EqualizerCircle* it;    int index = -1;    bool inserted = false;    for ( it = m_circleList->first(); it; it = m_circleList->next() )    {        if(it->x() > x)        {            index = m_circleList->find(it);            //if(index != 0)            //{                m_circleList->insert(index,this);                inserted = true;            //}            break;        }    }    if( !inserted )        m_circleList->append(this);    //clean up the loose pointer for the line that was split    unsigned int circleIndex = m_circleList->find(this);    if(circleIndex > 0)        m_circleList->at(circleIndex-1)->setLine(RIGHT,m_line1);    if(circleIndex < m_circleList->count()-1)         m_circleList->at(circleIndex+1)->setLine(LEFT,m_line2);}void EqualizerCircle::setLocation(const QPoint &newLocation){    unsigned int circleIndex = m_circleList->find(this);    double xMin, xMax;    QPoint correctedLoc(newLocation);    if(m_line1 == 0 || m_line2 == 0)    {//if the line is on the edges of the board, make it only move vertically        correctedLoc.setX( (int) x());    }    else    {        xMin = 0; xMax = canvas()->width();        if(circleIndex > 0)        {        // kdDebug() << "circleIndex " << circleIndex << endl;            xMin = m_circleList->at(circleIndex - 1)->x();        }        if(circleIndex < m_circleList->count()-1)        {            //kdDebug() << "circleIndex " << circleIndex << " count " << m_circleList->count() << endl;            xMax = m_circleList->at(circleIndex + 1)->x();        }        if(newLocation.x() < xMin)        {            //kdDebug() << "set " << newLocation.x() << " to xMin " << xMin << endl;            correctedLoc.setX( (int) (xMin + 1.0) );        }        else if (newLocation.x() > xMax)        {        //kdDebug() << "set " << newLocation.x() << " to xMax " << xMax << endl;            correctedLoc.setX( (int) (xMax - 1.0) );        }    }    if(newLocation.y() > canvas()->height())        correctedLoc.setY(canvas()->height());    else if (newLocation.y() < 0)        correctedLoc.setY(0);    move(correctedLoc.x(), correctedLoc.y());    if (m_line1) //account for circles on the edge        m_line1->setPoints( m_line1->startPoint().x()                       ,m_line1->startPoint().y()                       ,correctedLoc.x()                       ,correctedLoc.y());    if(m_line2)        m_line2->setPoints(correctedLoc.x()                       , correctedLoc.y()                       , m_line2->endPoint().x()                       , m_line2->endPoint().y());    canvas()->update();}void EqualizerCircle::setLine(WhichLine lineNum, QCanvasLine* line){    if(lineNum == LEFT)        m_line1 = line;    else        m_line2 = line;}void CallAmarok::updateEq(){        QByteArray data;        QDataStream arg(data, IO_WriteOnly);        arg << m_preampSlider->value() *-1;        QValueList<int> cs = m_canvasView->currentSettings();        QValueList<int>::iterator it;        for ( it = cs.begin(); it != cs.end(); ++it )            arg << (*it);        KApplication::dcopClient()->send("amarok", "player",            "setEqualizer(int,int,int,int,int,int,int,int,int,int,int)"            , data);}#include "equalizercanvasview.moc"