src/gui/dialogs/qcolordialog.cpp

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/****************************************************************************
**
** Copyright (C) 1992-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at sales@trolltech.com.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include "qcolordialog.h"

#ifndef QT_NO_COLORDIALOG

#include "qdialog_p.h"
#include "qapplication.h"
#include "qdesktopwidget.h"
#include "qdrawutil.h"
#include "qevent.h"
#include "qimage.h"
#include "qlabel.h"
#include "qlayout.h"
#include "qlineedit.h"
#include "qmenu.h"
#include "qpainter.h"
#include "qpixmap.h"
#include "qpushbutton.h"
#include "qsettings.h"
#include "qstyle.h"
#include "qstyleoption.h"
#include "qvalidator.h"
#include "qmime.h"
#include "qspinbox.h"

#ifdef Q_WS_MAC
QRgb macGetRgba(QRgb initial, bool *ok, QWidget *parent);
QColor macGetColor(const QColor& initial, QWidget *parent);
#endif


struct QWellArrayData;

class QWellArray : public QWidget
{
    Q_OBJECT
    Q_PROPERTY(int selectedColumn READ selectedColumn)
    Q_PROPERTY(int selectedRow READ selectedRow)

public:
    QWellArray(int rows, int cols, QWidget* parent=0);
    ~QWellArray() {}
    QString cellContent(int row, int col) const;

    int selectedColumn() const { return selCol; }
    int selectedRow() const { return selRow; }

    virtual void setCurrent(int row, int col);
    virtual void setSelected(int row, int col);

    QSize sizeHint() const;

    virtual void setCellBrush(int row, int col, const QBrush &);
    QBrush cellBrush(int row, int col);

    inline int cellWidth() const
        { return cellw; }

    inline int cellHeight() const
        { return cellh; }

    inline int rowAt(int y) const
        { return y / cellh; }

    inline int columnAt(int x) const
        { if (isRightToLeft()) return ncols - (x / cellw) - 1; return x / cellw; }

    inline int rowY(int row) const
        { return cellh * row; }

    inline int columnX(int column) const
        { if (isRightToLeft()) return cellw * (ncols - column - 1); return cellw * column; }

    inline int numRows() const
        { return nrows; }

    inline int numCols() const
        {return ncols; }

    inline QRect cellRect() const
        { return QRect(0, 0, cellw, cellh); }

    inline QSize gridSize() const
        { return QSize(ncols * cellw, nrows * cellh); }

    QRect cellGeometry(int row, int column)
        {
            QRect r;
            if (row >= 0 && row < nrows && column >= 0 && column < ncols)
                r.setRect(columnX(column), rowY(row), cellw, cellh);
            return r;
        }


    inline void updateCell(int row, int column) { update(cellGeometry(row, column)); }


signals:
    void selected(int row, int col);

protected:
    virtual void paintCell(QPainter *, int row, int col, const QRect&);
    virtual void paintCellContents(QPainter *, int row, int col, const QRect&);

    void mousePressEvent(QMouseEvent*);
    void mouseReleaseEvent(QMouseEvent*);
    void keyPressEvent(QKeyEvent*);
    void focusInEvent(QFocusEvent*);
    void focusOutEvent(QFocusEvent*);
    void paintEvent(QPaintEvent *);

private:
    Q_DISABLE_COPY(QWellArray)

    int nrows;
    int ncols;
    int cellw;
    int cellh;
    int curRow;
    int curCol;
    int selRow;
    int selCol;
    QWellArrayData *d;
};

void QWellArray::paintEvent(QPaintEvent *e)
{
    QRect r = e->rect();
    int cx = r.x();
    int cy = r.y();
    int ch = r.height();
    int cw = r.width();
    int colfirst = columnAt(cx);
    int collast = columnAt(cx + cw);
    int rowfirst = rowAt(cy);
    int rowlast = rowAt(cy + ch);

    if (isRightToLeft()) {
        int t = colfirst;
        colfirst = collast;
        collast = t;
    }

    QPainter painter(this);
    QPainter *p = &painter;
    QRect rect(0, 0, cellWidth(), cellHeight());


    if (collast < 0 || collast >= ncols)
        collast = ncols-1;
    if (rowlast < 0 || rowlast >= nrows)
        rowlast = nrows-1;

    // Go through the rows
    for (int r = rowfirst; r <= rowlast; ++r) {
        // get row position and height
        int rowp = rowY(r);

        // Go through the columns in the row r
        // if we know from where to where, go through [colfirst, collast],
        // else go through all of them
        for (int c = colfirst; c <= collast; ++c) {
            // get position and width of column c
            int colp = columnX(c);
            // Translate painter and draw the cell
            rect.translate(colp, rowp);
            paintCell(p, r, c, rect);
            rect.translate(-colp, -rowp);
        }
    }

}

struct QWellArrayData {
    QBrush *brush;
};

QWellArray::QWellArray(int rows, int cols, QWidget *parent)
    : QWidget(parent)
        ,nrows(rows), ncols(cols)
{
    d = 0;
    setFocusPolicy(Qt::StrongFocus);
    cellw = 28;
    cellh = 24;
    curCol = 0;
    curRow = 0;
    selCol = -1;
    selRow = -1;

}


QSize QWellArray::sizeHint() const
{
    ensurePolished();
    return gridSize().boundedTo(QSize(640, 480));
}


void QWellArray::paintCell(QPainter* p, int row, int col, const QRect &rect)
{
    int b = 3; //margin

    const QPalette & g = palette();
    QStyleOptionFrame opt;
    int dfw = style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
    opt.lineWidth = dfw;
    opt.midLineWidth = 1;
    opt.rect = rect.adjusted(b, b, -b, -b);
    opt.palette = g;
    opt.state = QStyle::State_Enabled | QStyle::State_Sunken;
    style()->drawPrimitive(QStyle::PE_Frame, &opt, p, this);
    b += dfw;

    if ((row == curRow) && (col == curCol)) {
        if (hasFocus()) {
            QStyleOptionFocusRect opt;
            opt.palette = g;
            opt.rect = rect;
            opt.state = QStyle::State_None | QStyle::State_KeyboardFocusChange;
            style()->drawPrimitive(QStyle::PE_FrameFocusRect, &opt, p, this);
        }
    }
    paintCellContents(p, row, col, opt.rect.adjusted(dfw, dfw, -dfw, -dfw));
}

void QWellArray::paintCellContents(QPainter *p, int row, int col, const QRect &r)
{

    if (d) {
        p->fillRect(r, d->brush[row*numCols()+col]);
    } else {
        p->fillRect(r, Qt::white);
        p->setPen(Qt::black);
        p->drawLine(r.topLeft(), r.bottomRight());
        p->drawLine(r.topRight(), r.bottomLeft());
    }
}


/*\reimp
*/
void QWellArray::mousePressEvent(QMouseEvent* e)
{
    // The current cell marker is set to the cell the mouse is pressed
    // in.
    QPoint pos = e->pos();
    setCurrent(rowAt(pos.y()), columnAt(pos.x()));
}

/*\reimp
*/
void QWellArray::mouseReleaseEvent(QMouseEvent*)
{
    // The current cell marker is set to the cell the mouse is clicked
    // in.
    setSelected(curRow, curCol);
}


/*
  Sets the cell currently having the focus. This is not necessarily
  the same as the currently selected cell.
*/

void QWellArray::setCurrent(int row, int col)
{

    if ((curRow == row) && (curCol == col))
        return;

    if (row < 0 || col < 0)
        row = col = -1;

    int oldRow = curRow;
    int oldCol = curCol;

    curRow = row;
    curCol = col;

    updateCell(oldRow, oldCol);
    updateCell(curRow, curCol);
}


/*
  Sets the currently selected cell to \a row, \a column. If \a row or
  \a column are less than zero, the current cell is unselected.

  Does not set the position of the focus indicator.
*/

void QWellArray::setSelected(int row, int col)
{
    int oldRow = selRow;
    int oldCol = selCol;

    if (row < 0 || col < 0)
        row = col = -1;

    selCol = col;
    selRow = row;

    updateCell(oldRow, oldCol);
    updateCell(selRow, selCol);
    if (row >= 0)
        emit selected(row, col);

#ifndef QT_NO_MENU
    if (isVisible() && qobject_cast<QMenu*>(parentWidget()))
        parentWidget()->close();
#endif
}



void QWellArray::focusInEvent(QFocusEvent*)
{
    updateCell(curRow, curCol);
}


void QWellArray::setCellBrush(int row, int col, const QBrush &b)
{
    if (!d) {
        d = new QWellArrayData;
        int i = numRows()*numCols();
        d->brush = new QBrush[i];
    }
    if (row >= 0 && row < numRows() && col >= 0 && col < numCols())
        d->brush[row*numCols()+col] = b;
}



/*
  Returns the brush set for the cell at \a row, \a column. If no brush is
  set, Qt::NoBrush is returned.
*/

QBrush QWellArray::cellBrush(int row, int col)
{
    if (d && row >= 0 && row < numRows() && col >= 0 && col < numCols())
        return d->brush[row*numCols()+col];
    return Qt::NoBrush;
}



void QWellArray::focusOutEvent(QFocusEvent*)
{
    updateCell(curRow, curCol);
}

/*\reimp
*/
void QWellArray::keyPressEvent(QKeyEvent* e)
{
    switch(e->key()) {                        // Look at the key code
    case Qt::Key_Left:                                // If 'left arrow'-key,
        if(curCol > 0)                        // and cr't not in leftmost col
            setCurrent(curRow, curCol - 1);        // set cr't to next left column
        break;
    case Qt::Key_Right:                                // Correspondingly...
        if(curCol < numCols()-1)
            setCurrent(curRow, curCol + 1);
        break;
    case Qt::Key_Up:
        if(curRow > 0)
            setCurrent(curRow - 1, curCol);
        break;
    case Qt::Key_Down:
        if(curRow < numRows()-1)
            setCurrent(curRow + 1, curCol);
        break;
    case Qt::Key_Return:
    case Qt::Key_Enter:
        /*
          ignore the key, so that the dialog get it, but still select
          the current row/col
        */
        e->ignore();
        // fallthrough intended
    case Qt::Key_Space:
        setSelected(curRow, curCol);
        break;
    default:                                // If not an interesting key,
        e->ignore();                        // we don't accept the event
        return;
    }

}


static bool initrgb = false;
static QRgb stdrgb[6*8];
static QRgb cusrgb[2*8];
static bool customSet = false;


static void initRGB()
{
    if (initrgb)
        return;
    initrgb = true;
    int i = 0;
    for (int g = 0; g < 4; g++)
        for (int r = 0;  r < 4; r++)
            for (int b = 0; b < 3; b++)
                stdrgb[i++] = qRgb(r*255/3, g*255/3, b*255/2);

    for (i = 0; i < 2*8; i++)
        cusrgb[i] = 0xffffffff;
}

int QColorDialog::customCount()
{
    return 2*8;
}

QRgb QColorDialog::customColor(int i)
{
    initRGB();
    Q_ASSERT(i >= 0 && i < customCount());
    return cusrgb[i];
}

void QColorDialog::setCustomColor(int i, QRgb c)
{
    initRGB();
    Q_ASSERT(i >= 0 && i < customCount());
    customSet = true;
    cusrgb[i] = c;
}

void QColorDialog::setStandardColor(int i, QRgb c)
{
    initRGB();
    Q_ASSERT(i >= 0 && i < 6*8);
    stdrgb[i] = c;
}

static inline void rgb2hsv(QRgb rgb, int&h, int&s, int&v)
{
    QColor c;
    c.setRgb(rgb);
    c.getHsv(&h, &s, &v);
}

class QColorWell : public QWellArray
{
public:
    QColorWell(QWidget *parent, int r, int c, QRgb *vals)
        :QWellArray(r, c, parent), values(vals), mousePressed(false), oldCurrent(-1, -1)
    { setSizePolicy(QSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum)); }

protected:
    void paintCellContents(QPainter *, int row, int col, const QRect&);
    void mousePressEvent(QMouseEvent *e);
    void mouseMoveEvent(QMouseEvent *e);
    void mouseReleaseEvent(QMouseEvent *e);
#ifndef QT_NO_DRAGANDDROP
    void dragEnterEvent(QDragEnterEvent *e);
    void dragLeaveEvent(QDragLeaveEvent *e);
    void dragMoveEvent(QDragMoveEvent *e);
    void dropEvent(QDropEvent *e);
#endif

private:
    QRgb *values;
    bool mousePressed;
    QPoint pressPos;
    QPoint oldCurrent;

};

void QColorWell::paintCellContents(QPainter *p, int row, int col, const QRect &r)
{
    int i = row + col*numRows();
    p->fillRect(r, QColor(values[i]));
}

void QColorWell::mousePressEvent(QMouseEvent *e)
{
    oldCurrent = QPoint(selectedRow(), selectedColumn());
    QWellArray::mousePressEvent(e);
    mousePressed = true;
    pressPos = e->pos();
}

void QColorWell::mouseMoveEvent(QMouseEvent *e)
{
    QWellArray::mouseMoveEvent(e);
#ifndef QT_NO_DRAGANDDROP
    if (!mousePressed)
        return;
    if ((pressPos - e->pos()).manhattanLength() > QApplication::startDragDistance()) {
        setCurrent(oldCurrent.x(), oldCurrent.y());
        int i = rowAt(pressPos.y()) + columnAt(pressPos.x()) * numRows();
        QColor col(values[i]);
        QMimeData *mime = new QMimeData;
        mime->setColorData(col);
        QPixmap pix(cellWidth(), cellHeight());
        pix.fill(col);
        QPainter p(&pix);
        p.drawRect(0, 0, pix.width(), pix.height());
        p.end();
        QDrag *drg = new QDrag(this);
        drg->setMimeData(mime);
        drg->setPixmap(pix);
        mousePressed = false;
        drg->start();
    }
#endif
}

#ifndef QT_NO_DRAGANDDROP
void QColorWell::dragEnterEvent(QDragEnterEvent *e)
{
    if (qvariant_cast<QColor>(e->mimeData()->colorData()).isValid())
        e->accept();
    else
        e->ignore();
}

void QColorWell::dragLeaveEvent(QDragLeaveEvent *)
{
    if (hasFocus())
        parentWidget()->setFocus();
}

void QColorWell::dragMoveEvent(QDragMoveEvent *e)
{
    if (qvariant_cast<QColor>(e->mimeData()->colorData()).isValid()) {
        setCurrent(rowAt(e->pos().y()), columnAt(e->pos().x()));
        e->accept();
    } else {
        e->ignore();
    }
}

void QColorWell::dropEvent(QDropEvent *e)
{
    QColor col = qvariant_cast<QColor>(e->mimeData()->colorData());
    if (col.isValid()) {
        int i = rowAt(e->pos().y()) + columnAt(e->pos().x()) * numRows();
        values[i] = col.rgb();
        update();
        e->accept();
    } else {
        e->ignore();
    }
}

#endif // QT_NO_DRAGANDDROP

void QColorWell::mouseReleaseEvent(QMouseEvent *e)
{
    if (!mousePressed)
        return;
    QWellArray::mouseReleaseEvent(e);
    mousePressed = false;
}

class QColorPicker : public QFrame
{
    Q_OBJECT
public:
    QColorPicker(QWidget* parent);
    ~QColorPicker();

public slots:
    void setCol(int h, int s);

signals:
    void newCol(int h, int s);

protected:
    QSize sizeHint() const;
    void paintEvent(QPaintEvent*);
    void mouseMoveEvent(QMouseEvent *);
    void mousePressEvent(QMouseEvent *);

private:
    int hue;
    int sat;

    QPoint colPt();
    int huePt(const QPoint &pt);
    int satPt(const QPoint &pt);
    void setCol(const QPoint &pt);

    QPixmap *pix;
};

static int pWidth = 220;
static int pHeight = 200;

class QColorLuminancePicker : public QWidget
{
    Q_OBJECT
public:
    QColorLuminancePicker(QWidget* parent=0);
    ~QColorLuminancePicker();

public slots:
    void setCol(int h, int s, int v);
    void setCol(int h, int s);

signals:
    void newHsv(int h, int s, int v);

protected:
    void paintEvent(QPaintEvent*);
    void mouseMoveEvent(QMouseEvent *);
    void mousePressEvent(QMouseEvent *);

private:
    enum { foff = 3, coff = 4 }; //frame and contents offset
    int val;
    int hue;
    int sat;

    int y2val(int y);
    int val2y(int val);
    void setVal(int v);

    QPixmap *pix;
};


int QColorLuminancePicker::y2val(int y)
{
    int d = height() - 2*coff - 1;
    return 255 - (y - coff)*255/d;
}

int QColorLuminancePicker::val2y(int v)
{
    int d = height() - 2*coff - 1;
    return coff + (255-v)*d/255;
}

QColorLuminancePicker::QColorLuminancePicker(QWidget* parent)
    :QWidget(parent)
{
    hue = 100; val = 100; sat = 100;
    pix = 0;
    //    setAttribute(WA_NoErase, true);
}

QColorLuminancePicker::~QColorLuminancePicker()
{
    delete pix;
}

void QColorLuminancePicker::mouseMoveEvent(QMouseEvent *m)
{
    setVal(y2val(m->y()));
}
void QColorLuminancePicker::mousePressEvent(QMouseEvent *m)
{
    setVal(y2val(m->y()));
}

void QColorLuminancePicker::setVal(int v)
{
    if (val == v)
        return;
    val = qMax(0, qMin(v,255));
    delete pix; pix=0;
    repaint();
    emit newHsv(hue, sat, val);
}

//receives from a hue,sat chooser and relays.
void QColorLuminancePicker::setCol(int h, int s)
{
    setCol(h, s, val);
    emit newHsv(h, s, val);
}

void QColorLuminancePicker::paintEvent(QPaintEvent *)
{
    int w = width() - 5;

    QRect r(0, foff, w, height() - 2*foff);
    int wi = r.width() - 2;
    int hi = r.height() - 2;
    if (!pix || pix->height() != hi || pix->width() != wi) {
        delete pix;
        QImage img(wi, hi, QImage::Format_RGB32);
        int y;
        for (y = 0; y < hi; y++) {
            QColor c;
            c.setHsv(hue, sat, y2val(y+coff));
            QRgb r = c.rgb();
            int x;
            for (x = 0; x < wi; x++)
                img.setPixel(x, y, r);
        }
        pix = new QPixmap(QPixmap::fromImage(img));
    }
    QPainter p(this);
    p.drawPixmap(1, coff, *pix);
    const QPalette &g = palette();
    qDrawShadePanel(&p, r, g, true);
    p.setPen(g.foreground().color());
    p.setBrush(g.foreground());
    QPolygon a;
    int y = val2y(val);
    a.setPoints(3, w, y, w+5, y+5, w+5, y-5);
    p.eraseRect(w, 0, 5, height());
    p.drawPolygon(a);
}

void QColorLuminancePicker::setCol(int h, int s , int v)
{
    val = v;
    hue = h;
    sat = s;
    delete pix; pix=0;
    repaint();
}

QPoint QColorPicker::colPt()
{ return QPoint((360-hue)*(pWidth-1)/360, (255-sat)*(pHeight-1)/255); }
int QColorPicker::huePt(const QPoint &pt)
{ return 360 - pt.x()*360/(pWidth-1); }
int QColorPicker::satPt(const QPoint &pt)
{ return 255 - pt.y()*255/(pHeight-1) ; }
void QColorPicker::setCol(const QPoint &pt)
{ setCol(huePt(pt), satPt(pt)); }

QColorPicker::QColorPicker(QWidget* parent)
    : QFrame(parent)
{
    hue = 0; sat = 0;
    setCol(150, 255);

    QImage img(pWidth, pHeight, QImage::Format_RGB32);
    int x,y;
    for (y = 0; y < pHeight; y++)
        for (x = 0; x < pWidth; x++) {
            QPoint p(x, y);
            QColor c;
            c.setHsv(huePt(p), satPt(p), 200);
            img.setPixel(x, y, c.rgb());
        }
    pix = new QPixmap(QPixmap::fromImage(img));
    setAttribute(Qt::WA_NoSystemBackground);
    setSizePolicy(QSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed) );
}

QColorPicker::~QColorPicker()
{
    delete pix;
}

QSize QColorPicker::sizeHint() const
{
    return QSize(pWidth + 2*frameWidth(), pHeight + 2*frameWidth());
}

void QColorPicker::setCol(int h, int s)
{
    int nhue = qMin(qMax(0,h), 359);
    int nsat = qMin(qMax(0,s), 255);
    if (nhue == hue && nsat == sat)
        return;
    QRect r(colPt(), QSize(20,20));
    hue = nhue; sat = nsat;
    r = r.united(QRect(colPt(), QSize(20,20)));
    r.translate(contentsRect().x()-9, contentsRect().y()-9);
    //    update(r);
    repaint(r);
}

void QColorPicker::mouseMoveEvent(QMouseEvent *m)
{
    QPoint p = m->pos() - contentsRect().topLeft();
    setCol(p);
    emit newCol(hue, sat);
}

void QColorPicker::mousePressEvent(QMouseEvent *m)
{
    QPoint p = m->pos() - contentsRect().topLeft();
    setCol(p);
    emit newCol(hue, sat);
}

void QColorPicker::paintEvent(QPaintEvent* )
{
    QPainter p(this);
    drawFrame(&p);
    QRect r = contentsRect();

    p.drawPixmap(r.topLeft(), *pix);
    QPoint pt = colPt() + r.topLeft();
    p.setPen(Qt::black);

    p.fillRect(pt.x()-9, pt.y(), 20, 2, Qt::black);
    p.fillRect(pt.x(), pt.y()-9, 2, 20, Qt::black);

}

class QColSpinBox : public QSpinBox
{
public:
    QColSpinBox(QWidget *parent)
        : QSpinBox(parent) { setRange(0, 255); }
    void setValue(int i) {
        bool block = signalsBlocked();
        blockSignals(true);
        QSpinBox::setValue(i);
        blockSignals(block);
    }
};

class QColorShowLabel;

class QColorShower : public QWidget
{
    Q_OBJECT
public:
    QColorShower(QWidget *parent);

    //things that don't emit signals
    void setHsv(int h, int s, int v);

    int currentAlpha() const { return alphaEd->value(); }
    void setCurrentAlpha(int a) { alphaEd->setValue(a); }
    void showAlpha(bool b);


    QRgb currentColor() const { return curCol; }

public slots:
    void setRgb(QRgb rgb);

signals:
    void newCol(QRgb rgb);
private slots:
    void rgbEd();
    void hsvEd();
private:
    void showCurrentColor();
    int hue, sat, val;
    QRgb curCol;
    QColSpinBox *hEd;
    QColSpinBox *sEd;
    QColSpinBox *vEd;
    QColSpinBox *rEd;
    QColSpinBox *gEd;
    QColSpinBox *bEd;
    QColSpinBox *alphaEd;
    QLabel *alphaLab;
    QColorShowLabel *lab;
    bool rgbOriginal;
};

class QColorShowLabel : public QFrame
{
    Q_OBJECT

public:
    QColorShowLabel(QWidget *parent) : QFrame(parent) {
        setFrameStyle(QFrame::Panel|QFrame::Sunken);
        setAcceptDrops(true);
        mousePressed = false;
    }
    void setColor(QColor c) { col = c; }

signals:
    void colorDropped(QRgb);

protected:
    void paintEvent(QPaintEvent *);
    void mousePressEvent(QMouseEvent *e);
    void mouseMoveEvent(QMouseEvent *e);
    void mouseReleaseEvent(QMouseEvent *e);
#ifndef QT_NO_DRAGANDDROP
    void dragEnterEvent(QDragEnterEvent *e);
    void dragLeaveEvent(QDragLeaveEvent *e);
    void dropEvent(QDropEvent *e);
#endif

private:
    QColor col;
    bool mousePressed;
    QPoint pressPos;

};

void QColorShowLabel::paintEvent(QPaintEvent *e)
{
    QPainter p(this);
    drawFrame(&p);
    p.fillRect(contentsRect()&e->rect(), col);
}

void QColorShower::showAlpha(bool b)
{
    if (b) {
        alphaLab->show();
        alphaEd->show();
    } else {
        alphaLab->hide();
        alphaEd->hide();
    }
}

void QColorShowLabel::mousePressEvent(QMouseEvent *e)
{
    mousePressed = true;
    pressPos = e->pos();
}

void QColorShowLabel::mouseMoveEvent(QMouseEvent *e)
{
#ifdef QT_NO_DRAGANDDROP
    Q_UNUSED(e);
#else
    if (!mousePressed)
        return;
    if ((pressPos - e->pos()).manhattanLength() > QApplication::startDragDistance()) {
        QMimeData *mime = new QMimeData;
        mime->setColorData(col);
        QPixmap pix(30, 20);
        pix.fill(col);
        QPainter p(&pix);
        p.drawRect(0, 0, pix.width(), pix.height());
        p.end();
        QDrag *drg = new QDrag(this);
        drg->setMimeData(mime);
        drg->setPixmap(pix);
        mousePressed = false;
        drg->start();
    }
#endif
}

#ifndef QT_NO_DRAGANDDROP
void QColorShowLabel::dragEnterEvent(QDragEnterEvent *e)
{
    if (qvariant_cast<QColor>(e->mimeData()->colorData()).isValid())
        e->accept();
    else
        e->ignore();
}

void QColorShowLabel::dragLeaveEvent(QDragLeaveEvent *)
{
}

void QColorShowLabel::dropEvent(QDropEvent *e)
{
    QColor color = qvariant_cast<QColor>(e->mimeData()->colorData());
    if (color.isValid()) {
        col = color;
        repaint();
        emit colorDropped(col.rgb());
        e->accept();
    } else {
        e->ignore();
    }
}
#endif // QT_NO_DRAGANDDROP

void QColorShowLabel::mouseReleaseEvent(QMouseEvent *)
{
    if (!mousePressed)
        return;
    mousePressed = false;
}

QColorShower::QColorShower(QWidget *parent)
    :QWidget(parent)
{
    curCol = qRgb(-1, -1, -1);

    QGridLayout *gl = new QGridLayout(this);
    gl->setMargin(gl->spacing());
    lab = new QColorShowLabel(this);
    lab->setMinimumWidth(60);
    gl->addWidget(lab, 0, 0, -1, 1);
    connect(lab, SIGNAL(colorDropped(QRgb)),
             this, SIGNAL(newCol(QRgb)));
    connect(lab, SIGNAL(colorDropped(QRgb)),
             this, SLOT(setRgb(QRgb)));

    hEd = new QColSpinBox(this);
    hEd->setRange(0, 359);
    QLabel *l = new QLabel(QColorDialog::tr("Hu&e:"), this);
#ifndef QT_NO_SHORTCUT
    l->setBuddy(hEd);
#endif
    l->setAlignment(Qt::AlignRight|Qt::AlignVCenter);
    gl->addWidget(l, 0, 1);
    gl->addWidget(hEd, 0, 2);

    sEd = new QColSpinBox(this);
    l = new QLabel(QColorDialog::tr("&Sat:"), this);
#ifndef QT_NO_SHORTCUT
    l->setBuddy(sEd);
#endif
    l->setAlignment(Qt::AlignRight|Qt::AlignVCenter);
    gl->addWidget(l, 1, 1);
    gl->addWidget(sEd, 1, 2);

    vEd = new QColSpinBox(this);
    l = new QLabel(QColorDialog::tr("&Val:"), this);
#ifndef QT_NO_SHORTCUT
    l->setBuddy(vEd);
#endif
    l->setAlignment(Qt::AlignRight|Qt::AlignVCenter);
    gl->addWidget(l, 2, 1);
    gl->addWidget(vEd, 2, 2);

    rEd = new QColSpinBox(this);
    l = new QLabel(QColorDialog::tr("&Red:"), this);
#ifndef QT_NO_SHORTCUT
    l->setBuddy(rEd);
#endif
    l->setAlignment(Qt::AlignRight|Qt::AlignVCenter);
    gl->addWidget(l, 0, 3);
    gl->addWidget(rEd, 0, 4);

    gEd = new QColSpinBox(this);
    l = new QLabel(QColorDialog::tr("&Green:"), this);
#ifndef QT_NO_SHORTCUT
    l->setBuddy(gEd);
#endif
    l->setAlignment(Qt::AlignRight|Qt::AlignVCenter);
    gl->addWidget(l, 1, 3);
    gl->addWidget(gEd, 1, 4);

    bEd = new QColSpinBox(this);
    l = new QLabel(QColorDialog::tr("Bl&ue:"), this);
#ifndef QT_NO_SHORTCUT
    l->setBuddy(bEd);
#endif
    l->setAlignment(Qt::AlignRight|Qt::AlignVCenter);
    gl->addWidget(l, 2, 3);
    gl->addWidget(bEd, 2, 4);

    alphaEd = new QColSpinBox(this);
    alphaLab = new QLabel(QColorDialog::tr("A&lpha channel:"), this);
#ifndef QT_NO_SHORTCUT
    alphaLab->setBuddy(alphaEd);
#endif
    alphaLab->setAlignment(Qt::AlignRight|Qt::AlignVCenter);
    gl->addWidget(alphaLab, 3, 1, 1, 3);
    gl->addWidget(alphaEd, 3, 4);
    alphaEd->hide();
    alphaLab->hide();

    connect(hEd, SIGNAL(valueChanged(int)), this, SLOT(hsvEd()));
    connect(sEd, SIGNAL(valueChanged(int)), this, SLOT(hsvEd()));
    connect(vEd, SIGNAL(valueChanged(int)), this, SLOT(hsvEd()));

    connect(rEd, SIGNAL(valueChanged(int)), this, SLOT(rgbEd()));
    connect(gEd, SIGNAL(valueChanged(int)), this, SLOT(rgbEd()));
    connect(bEd, SIGNAL(valueChanged(int)), this, SLOT(rgbEd()));
    connect(alphaEd, SIGNAL(valueChanged(int)), this, SLOT(rgbEd()));
}

void QColorShower::showCurrentColor()
{
    lab->setColor(currentColor());
    lab->repaint();
}

void QColorShower::rgbEd()
{
    rgbOriginal = true;
    if (alphaEd->isVisible())
        curCol = qRgba(rEd->value(), gEd->value(), bEd->value(), currentAlpha());
    else
        curCol = qRgb(rEd->value(), gEd->value(), bEd->value());

    rgb2hsv(currentColor(), hue, sat, val);

    hEd->setValue(hue);
    sEd->setValue(sat);
    vEd->setValue(val);

    showCurrentColor();
    emit newCol(currentColor());
}

void QColorShower::hsvEd()
{
    rgbOriginal = false;
    hue = hEd->value();
    sat = sEd->value();
    val = vEd->value();

    QColor c;
    c.setHsv(hue, sat, val);
    curCol = c.rgb();

    rEd->setValue(qRed(currentColor()));
    gEd->setValue(qGreen(currentColor()));
    bEd->setValue(qBlue(currentColor()));

    showCurrentColor();
    emit newCol(currentColor());
}

void QColorShower::setRgb(QRgb rgb)
{
    rgbOriginal = true;
    curCol = rgb;

    rgb2hsv(currentColor(), hue, sat, val);

    hEd->setValue(hue);
    sEd->setValue(sat);
    vEd->setValue(val);

    rEd->setValue(qRed(currentColor()));
    gEd->setValue(qGreen(currentColor()));
    bEd->setValue(qBlue(currentColor()));

    showCurrentColor();
}

void QColorShower::setHsv(int h, int s, int v)
{
    if (h < -1 || (uint)s > 255 || (uint)v > 255)
  return;

    rgbOriginal = false;
    hue = h; val = v; sat = s;
    QColor c;
    c.setHsv(hue, sat, val);
    curCol = c.rgb();

    hEd->setValue(hue);
    sEd->setValue(sat);
    vEd->setValue(val);

    rEd->setValue(qRed(currentColor()));
    gEd->setValue(qGreen(currentColor()));
    bEd->setValue(qBlue(currentColor()));

    showCurrentColor();
}

class QColorDialogPrivate : public QDialogPrivate
{
    Q_DECLARE_PUBLIC(QColorDialog)
public:
    void init();
    QRgb currentColor() const { return cs->currentColor(); }
    void setCurrentColor(QRgb rgb);

    int currentAlpha() const { return cs->currentAlpha(); }
    void setCurrentAlpha(int a) { cs->setCurrentAlpha(a); }
    void showAlpha(bool b) { cs->showAlpha(b); }

    void _q_addCustom();

    void _q_newHsv(int h, int s, int v);
    void _q_newColorTypedIn(QRgb rgb);
    void _q_newCustom(int, int);
    void _q_newStandard(int, int);

    QWellArray *custom;
    QWellArray *standard;

    QColorPicker *cp;
    QColorLuminancePicker *lp;
    QColorShower *cs;
    int nextCust;
    bool compact;
};

//sets all widgets to display h,s,v
void QColorDialogPrivate::_q_newHsv(int h, int s, int v)
{
    cs->setHsv(h, s, v);
    cp->setCol(h, s);
    lp->setCol(h, s, v);
}

//sets all widgets to display rgb
void QColorDialogPrivate::setCurrentColor(QRgb rgb)
{
    cs->setRgb(rgb);
    _q_newColorTypedIn(rgb);
}

//sets all widgets except cs to display rgb
void QColorDialogPrivate::_q_newColorTypedIn(QRgb rgb)
{
    int h, s, v;
    rgb2hsv(rgb, h, s, v);
    cp->setCol(h, s);
    lp->setCol(h, s, v);
}

void QColorDialogPrivate::_q_newCustom(int r, int c)
{
    int i = r+2*c;
    setCurrentColor(cusrgb[i]);
    nextCust = i;
    if (standard)
        standard->setSelected(-1,-1);
}

void QColorDialogPrivate::_q_newStandard(int r, int c)
{
    setCurrentColor(stdrgb[r+c*6]);
    if (custom)
        custom->setSelected(-1,-1);
}

void QColorDialogPrivate::init()
{
    Q_Q(QColorDialog);
    compact = false;
    // small displays (e.g. PDAs cannot fit the full color dialog,
    // so just use the color picker.
    if (qApp->desktop()->width() < 480 || qApp->desktop()->height() < 350)
        compact = true;

    nextCust = 0;
    QHBoxLayout *topLay = new QHBoxLayout(q);
    const int lumSpace = topLay->spacing() / 2;
    QVBoxLayout *leftLay = 0;

    if (!compact) {
        leftLay = new QVBoxLayout;
        topLay->addLayout(leftLay);
    }

    initRGB();

    if (!compact) {
        standard = new QColorWell(q, 6, 8, stdrgb);
        QLabel *lab = new QLabel(QColorDialog::tr("&Basic colors"), q);
#ifndef QT_NO_SHORTCUT
        lab->setBuddy(standard);
#endif
        q->connect(standard, SIGNAL(selected(int,int)), SLOT(_q_newStandard(int,int)));
        leftLay->addWidget(lab);
        leftLay->addWidget(standard);


        leftLay->addStretch();

        custom = new QColorWell(q, 2, 8, cusrgb);
        custom->setAcceptDrops(true);

        q->connect(custom, SIGNAL(selected(int,int)), SLOT(_q_newCustom(int,int)));
        lab = new QLabel(QColorDialog::tr("&Custom colors") , q);
#ifndef QT_NO_SHORTCUT
        lab->setBuddy(custom);
#endif
        leftLay->addWidget(lab);
        leftLay->addWidget(custom);

        QPushButton *custbut = new QPushButton(QColorDialog::tr("&Define Custom Colors >>"), q);
        custbut->setEnabled(false);
        leftLay->addWidget(custbut);
    } else {
        // better color picker size for small displays
        pWidth = 150;
        pHeight = 100;
        custom = 0;
        standard = 0;
    }

    QVBoxLayout *rightLay = new QVBoxLayout;
    topLay->addLayout(rightLay);

    QHBoxLayout *pickLay = new QHBoxLayout;
    rightLay->addLayout(pickLay);


    QVBoxLayout *cLay = new QVBoxLayout;
    pickLay->addLayout(cLay);
    cp = new QColorPicker(q);
    cp->setFrameStyle(QFrame::Panel + QFrame::Sunken);
    cLay->addSpacing(lumSpace);
    cLay->addWidget(cp);
    cLay->addSpacing(lumSpace);

    lp = new QColorLuminancePicker(q);
    lp->setFixedWidth(20);
    pickLay->addWidget(lp);

    QObject::connect(cp, SIGNAL(newCol(int,int)), lp, SLOT(setCol(int,int)));
    QObject::connect(lp, SIGNAL(newHsv(int,int,int)), q, SLOT(_q_newHsv(int,int,int)));

    rightLay->addStretch();

    cs = new QColorShower(q);
    QObject::connect(cs, SIGNAL(newCol(QRgb)), q, SLOT(_q_newColorTypedIn(QRgb)));
    rightLay->addWidget(cs);

    QHBoxLayout *buttons;
    if (compact) {
        buttons = new QHBoxLayout;
        rightLay->addLayout(buttons);
    } else {
        buttons = new QHBoxLayout;
        leftLay->addLayout(buttons);
    }

    QPushButton *ok, *cancel;
    ok = new QPushButton(QColorDialog::tr("OK"), q);
    QObject::connect(ok, SIGNAL(clicked()), q, SLOT(accept()));
    ok->setDefault(true);
    cancel = new QPushButton(QColorDialog::tr("Cancel"), q);
    QObject::connect(cancel, SIGNAL(clicked()), q, SLOT(reject()));
    buttons->addWidget(ok);
    buttons->addWidget(cancel);
    buttons->addStretch();

    if (!compact) {
        QPushButton *addCusBt = new QPushButton(QColorDialog::tr("&Add to Custom Colors"), q);
        rightLay->addWidget(addCusBt);
        QObject::connect(addCusBt, SIGNAL(clicked()), q, SLOT(_q_addCustom()));
    }
}

void QColorDialogPrivate::_q_addCustom()
{
    cusrgb[nextCust] = cs->currentColor();
    if (custom)
        custom->update();
    nextCust = (nextCust+1) % 16;
}


QColorDialog::QColorDialog(QWidget* parent, bool modal) :
    QDialog(*new QColorDialogPrivate, parent, (Qt::Dialog | Qt::WindowTitleHint |
                     Qt::MSWindowsFixedSizeDialogHint | Qt::WindowSystemMenuHint))
{
    Q_D(QColorDialog);
    setModal(modal);
    setSizeGripEnabled(false);
    d->init();

#ifndef QT_NO_SETTINGS
    if (!customSet) {
        QSettings settings(QSettings::UserScope, QLatin1String("Trolltech"));
        settings.beginGroup(QLatin1String("Qt"));
        for (int i = 0; i < 2*8; ++i) {
            QVariant v = settings.value(QLatin1String("customColors/") + QString::number(i));
            if (v.isValid()) {
                QRgb rgb = v.toUInt();
                cusrgb[i] = rgb;
            }
        }
        settings.endGroup(); // Qt
    }
#endif
}

QColor QColorDialog::getColor(const QColor& initial, QWidget *parent)
{
#if defined(Q_WS_MAC)
    return macGetColor(initial, parent);
#endif

    QColorDialog *dlg = new QColorDialog(parent, true);  //modal
    dlg->setWindowTitle(QColorDialog::tr("Select color"));
    dlg->setColor(initial);
    dlg->selectColor(initial);
    int resultCode = dlg->exec();
    QColor result;
    if (resultCode == QDialog::Accepted)
        result = dlg->color();
    delete dlg;
    return result;
}


QRgb QColorDialog::getRgba(QRgb initial, bool *ok, QWidget *parent)
{
#if defined(Q_WS_MAC)
    return macGetRgba(initial, ok, parent);
#endif

    QColorDialog *dlg = new QColorDialog(parent, true);  //modal

    dlg->setWindowTitle(QColorDialog::tr("Select color"));
    dlg->setColor(initial);
    dlg->selectColor(initial);
    dlg->setSelectedAlpha(qAlpha(initial));
    int resultCode = dlg->exec();
    QRgb result = initial;
    if (resultCode == QDialog::Accepted) {
        QRgb c = dlg->color().rgb();
        int alpha = dlg->selectedAlpha();
        result = qRgba(qRed(c), qGreen(c), qBlue(c), alpha);
    }
    if (ok)
        *ok = resultCode == QDialog::Accepted;

    delete dlg;
    return result;
}





QColor QColorDialog::color() const
{
    Q_D(const QColorDialog);
    return QColor(d->currentColor());
}


QColorDialog::~QColorDialog()
{
#ifndef QT_NO_SETTINGS
    if (!customSet) {
        QSettings settings(QSettings::UserScope, QLatin1String("Trolltech"));
        settings.beginGroup(QLatin1String("Qt"));
        for (int i = 0; i < 2*8; ++i)
            settings.setValue(QLatin1String("customColors/") + QString::number(i), cusrgb[i]);
        settings.endGroup();
    }
#endif
}


void QColorDialog::setColor(const QColor& c)
{
    Q_D(QColorDialog);
    d->setCurrentColor(c.rgb());
}




void QColorDialog::setSelectedAlpha(int a)
{
    Q_D(QColorDialog);
    d->showAlpha(true);
    d->setCurrentAlpha(a);
}


int QColorDialog::selectedAlpha() const
{
    Q_D(const QColorDialog);
    return d->currentAlpha();
}

bool QColorDialog::selectColor(const QColor& col)
{
    Q_D(QColorDialog);
    QRgb color = col.rgb();
    int i = 0, j = 0;
    // Check standard colors
    if (d->standard) {
        for (i = 0; i < 6; i++) {
            for (j = 0; j < 8; j++) {
                if (color == stdrgb[i + j*6]) {
                    d->_q_newStandard(i, j);
                    d->standard->setCurrent(i, j);
                    d->standard->setSelected(i, j);
                    d->standard->setFocus();
                    return true;
                }
            }
        }
    }
    // Check custom colors
    if (d->custom) {
        for (i = 0; i < 2; i++) {
            for (j = 0; j < 8; j++) {
                if (color == cusrgb[i + j*2]) {
                    d->_q_newCustom(i, j);
                    d->custom->setCurrent(i, j);
                    d->custom->setSelected(i, j);
                    d->custom->setFocus();
                    return true;
                }
            }
        }
    }
    return false;
}

#include "qcolordialog.moc"
#include "moc_qcolordialog.cpp"

#endif

---