qcolordialog.cpp

奇趣公司比较新的qt/emd版本

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** This file is part of the QtGui module of the Qt Toolkit.
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#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 needAlpha, bool *ok, QWidget *parent);
QColor macGetColor(const QColor& initial, QWidget *parent);
#endif

//////////// QWellArray BEGIN

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));
}

/*!
  Reimplement this function to change the contents of the well array.
 */
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
}



/*!\reimp
*/
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;
}



/*!\reimp
*/

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;
    }

}

//////////// QWellArray END

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;
}

/*!
    Returns the number of custom colors supported by QColorDialog. All
    color dialogs share the same custom colors.
*/
int QColorDialog::customCount()
{
    return 2*8;
}

/*!
    Returns custom color number \a i as a QRgb value.
*/
QRgb QColorDialog::customColor(int i)
{
    initRGB();
    Q_ASSERT(i >= 0 && i < customCount());
    return cusrgb[i];
}

/*!
    \fn void QColorDialog::setCustomColor(int number, QRgb color)

    Sets the custom color \a number to the QRgb \a color value.
*/
void QColorDialog::setCustomColor(int i, QRgb c)
{
    initRGB();
    Q_ASSERT(i >= 0 && i < customCount());
    customSet = true;
    cusrgb[i] = c;
}

/*!
    \fn void QColorDialog::setStandardColor(int number, QRgb color)

    Sets the standard color \a number to the QRgb \a color value given.
*/

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;