qtableview.cpp

qtopia-phone-2.2.0下公共的控件实现源代码。

		matrix.translate( xPos, yPos );
		paint.setWorldMatrix( matrix );
		if ( testTableFlags(Tbl_clipCellPainting) ||
		     frameWidth() > 0 && !winR.contains( cellR ) ) { //##arnt
		    paint.setClipRect( cellUR );
		    paintCell( &paint, row, col );
		    paint.setClipping( FALSE );
		} else {
		    paintCell( &paint, row, col );
		}
		matrix.reset();
		paint.setWorldMatrix( matrix );
#else
		paint.translate( xPos, yPos );
		if ( testTableFlags(Tbl_clipCellPainting) ||
		     frameWidth() > 0 && !winR.contains( cellR ) ) { //##arnt
		    paint.setClipRect( cellUR );
		    paintCell( &paint, row, col );
		    paint.setClipping( FALSE );
		} else {
		    paintCell( &paint, row, col );
		}
		paint.translate( -xPos, -yPos );
#endif
	    }
	    col++;
	    xPos = nextX;
	}
	row++;
	yPos = nextY;
    }

    // while painting we have to erase any areas in the view that
    // are not covered by cells but are covered by the paint event
    // rectangle these must be erased. We know that xPos is the last
    // x pixel updated + 1 and that yPos is the last y pixel updated + 1.

    // Note that this needs to be done regardless whether we do
    // eraseInPaint or not. Reason: a subclass (for example
    // QMultiLineEdit) may implement flicker-freeness and encourage
    // the use of repaint(FALSE). The subclass, however, cannot draw
    // all pixels, just those inside the cells. So QTableView is
    // reponsible for all pixels outside the cells.

    QRect viewR = viewRect();
    const QColorGroup g = colorGroup();
    
    if ( xPos <= maxX ) {
	QRect r = viewR;
	r.setLeft( xPos );
	r.setBottom( yPos<maxY?yPos:maxY );
	if ( inherits( "QMultiLineEdit" ) )
#ifdef QT_KEYPAD_MODE
	    if ( qt_modalEditingEnabled && !isModalEditing() )
		paint.fillRect( r.intersect( updateR ), g.brush(QColorGroup::Background) );
	    else
#endif
	    paint.fillRect( r.intersect( updateR ), g.brush(QColorGroup::Base) );
	else
	    paint.eraseRect( r.intersect( updateR ) );
    }
    if ( yPos <= maxY ) {
	QRect r = viewR;
	r.setTop( yPos );
	if ( inherits( "QMultiLineEdit" ) )
#ifdef QT_KEYPAD_MODE
	    if ( qt_modalEditingEnabled && !isModalEditing() )
		paint.fillRect( r.intersect( updateR ), g.brush(QColorGroup::Background) );
	    else
#endif
	    paint.fillRect( r.intersect( updateR ), g.brush(QColorGroup::Base) );
	else
	    paint.eraseRect( r.intersect( updateR ) );
    }
}

/*!\reimp
*/
void QTableView::resizeEvent( QResizeEvent * /* e */)
{
    updateScrollBars( horValue | verValue | horSteps | horGeometry | horRange |
		      verSteps | verGeometry | verRange );
    showOrHideScrollBars();
    updateFrameSize();
    int maxX = QMIN( xOffs, maxXOffset() );			// ### can be slow
    int maxY = QMIN( yOffs, maxYOffset() );
    setOffset( maxX, maxY );

    if ( testWState(WState_AutoMask) )
	updateMask();
}


/*!
  Redraws all visible cells in the table view.
*/

void QTableView::updateView()
{
    repaint( viewRect() );
}

/*!
  Returns a pointer to the vertical scroll bar, mainly so you can
  connect() to its signals.  Note that the scroll bar works in pixel
  values, use findRow() to translate to cell numbers.
*/

QScrollBar *QTableView::verticalScrollBar() const
{
    QTableView *that = (QTableView*)this; // semantic const
    if ( !vScrollBar ) {
	QScrollBar *sb = new QScrollBar( QScrollBar::Vertical, that );
#ifndef QT_NO_CURSOR
	sb->setCursor( arrowCursor );
#endif
        sb->resize( sb->sizeHint() ); // height is irrelevant
	CHECK_PTR(sb);
	sb->setTracking( FALSE );
	sb->setFocusPolicy( NoFocus );
	connect( sb, SIGNAL(valueChanged(int)),
		 SLOT(verSbValue(int)));
	connect( sb, SIGNAL(sliderMoved(int)),
		 SLOT(verSbSliding(int)));
	connect( sb, SIGNAL(sliderReleased()),
		 SLOT(verSbSlidingDone()));
	sb->hide();
	that->vScrollBar = sb;
	return sb;
    }
    return vScrollBar;
}

/*!
  Returns a pointer to the horizontal scroll bar, mainly so you can
  connect() to its signals. Note that the scroll bar works in pixel
  values, use findCol() to translate to cell numbers.
*/

QScrollBar *QTableView::horizontalScrollBar() const
{
    QTableView *that = (QTableView*)this; // semantic const
    if ( !hScrollBar ) {
	QScrollBar *sb = new QScrollBar( QScrollBar::Horizontal, that );
#ifndef QT_NO_CURSOR
	sb->setCursor( arrowCursor );
#endif
	sb->resize( sb->sizeHint() ); // width is irrelevant
	sb->setFocusPolicy( NoFocus );
	CHECK_PTR(sb);
	sb->setTracking( FALSE );
	connect( sb, SIGNAL(valueChanged(int)),
		 SLOT(horSbValue(int)));
	connect( sb, SIGNAL(sliderMoved(int)),
		 SLOT(horSbSliding(int)));
	connect( sb, SIGNAL(sliderReleased()),
		 SLOT(horSbSlidingDone()));
	sb->hide();
	that->hScrollBar = sb;
	return sb;
    }
    return hScrollBar;
}

/*!
  Enables or disables the horizontal scroll bar, as required by
  setAutoUpdate() and the \link setTableFlags() table flags\endlink.
*/

void QTableView::setHorScrollBar( bool on, bool update )
{
    if ( on ) {
	tFlags |= Tbl_hScrollBar;
	horizontalScrollBar(); // created
	if ( update )
	    updateScrollBars( horMask | verMask );
	else
	    sbDirty = sbDirty | (horMask | verMask);
	if ( testTableFlags( Tbl_vScrollBar ) )
	    coverCornerSquare( TRUE );
	if ( autoUpdate() )
	    sbDirty = sbDirty | horMask;
    } else {
	tFlags &= ~Tbl_hScrollBar;
	if ( !hScrollBar )
	    return;
	coverCornerSquare( FALSE );
	bool hideScrollBar = autoUpdate() && hScrollBar->isVisible();
	if ( hideScrollBar )
	    hScrollBar->hide();
	if ( update )
	    updateScrollBars( verMask );
	else
	    sbDirty = sbDirty | verMask;
	if ( hideScrollBar && isVisible() )
	    repaint( hScrollBar->x(), hScrollBar->y(),
		     width() - hScrollBar->x(), hScrollBar->height() );
    }
    if ( update )
	updateFrameSize();
}


/*!
  Enables or disables the vertical scroll bar, as required by
  setAutoUpdate() and the \link setTableFlags() table flags\endlink.
*/

void QTableView::setVerScrollBar( bool on, bool update )
{
    if ( on ) {
	tFlags |= Tbl_vScrollBar;
	verticalScrollBar(); // created
	if ( update )
	    updateScrollBars( verMask | horMask );
	else
	    sbDirty = sbDirty | (horMask | verMask);
	if ( testTableFlags( Tbl_hScrollBar ) )
	    coverCornerSquare( TRUE );
	if ( autoUpdate() )
	    sbDirty = sbDirty | verMask;
    } else {
	tFlags &= ~Tbl_vScrollBar;
	if ( !vScrollBar )
	    return;
	coverCornerSquare( FALSE );
	bool hideScrollBar = autoUpdate() && vScrollBar->isVisible();
	if ( hideScrollBar )
	    vScrollBar->hide();
	if ( update )
	    updateScrollBars( horMask );
	else
	    sbDirty = sbDirty | horMask;
	if ( hideScrollBar && isVisible() )
	    repaint( vScrollBar->x(), vScrollBar->y(),
		     vScrollBar->width(), height() - vScrollBar->y() );
    }
    if ( update )
	updateFrameSize();
}




int QTableView::findRawRow( int yPos, int *cellMaxY, int *cellMinY,
			    bool goOutsideView ) const
{
    int r = -1;
    if ( nRows == 0 )
	return r;
    if ( goOutsideView || yPos >= minViewY() && yPos <= maxViewY() ) {
	if ( yPos < minViewY() ) {
#if defined(CHECK_RANGE)
	    qWarning( "QTableView::findRawRow: (%s) internal error: "
		     "yPos < minViewY() && goOutsideView "
		     "not supported. (%d,%d)",
		     name( "unnamed" ), yPos, yOffs );
#endif
	    return -1;
	}
	if ( cellH ) {				     // uniform cell height
	    r = (yPos - minViewY() + yCellDelta)/cellH; // cell offs from top
	    if ( cellMaxY )
		*cellMaxY = (r + 1)*cellH + minViewY() - yCellDelta - 1;
	    if ( cellMinY )
		*cellMinY = r*cellH + minViewY() - yCellDelta;
	    r += yCellOffs;			     // absolute cell index
	} else {				     // variable cell height
	    QTableView *tw = (QTableView *)this;
	    r	     = yCellOffs;
	    int h    = minViewY() - yCellDelta; //##arnt3
	    int oldH = h;
	    ASSERT( r < nRows );
	    while ( r < nRows ) {
		oldH = h;
		h += tw->cellHeight( r );	     // Start of next cell
		if ( yPos < h )
		    break;
		r++;
	    }
	    if ( cellMaxY )
		*cellMaxY = h - 1;
	    if ( cellMinY )
		*cellMinY = oldH;
	}
    }
    return r;

}


int QTableView::findRawCol( int xPos, int *cellMaxX, int *cellMinX ,
			    bool goOutsideView ) const
{
    int c = -1;
    if ( nCols == 0 )
	return c;
    if ( goOutsideView || xPos >= minViewX() && xPos <= maxViewX() ) {
	if ( xPos < minViewX() ) {
#if defined(CHECK_RANGE)
	    qWarning( "QTableView::findRawCol: (%s) internal error: "
		     "xPos < minViewX() && goOutsideView "
		     "not supported. (%d,%d)",
		     name( "unnamed" ), xPos, xOffs );
#endif
	    return -1;
	}
	if ( cellW ) {				// uniform cell width
	    c = (xPos - minViewX() + xCellDelta)/cellW; //cell offs from left
	    if ( cellMaxX )
		*cellMaxX = (c + 1)*cellW + minViewX() - xCellDelta - 1;
	    if ( cellMinX )
		*cellMinX = c*cellW + minViewX() - xCellDelta;
	    c += xCellOffs;			// absolute cell index
	} else {				// variable cell width
	    QTableView *tw = (QTableView *)this;
	    c	     = xCellOffs;
	    int w    = minViewX() - xCellDelta; //##arnt3
	    int oldW = w;
	    ASSERT( c < nCols );
	    while ( c < nCols ) {
		oldW = w;
		w += tw->cellWidth( c );	// Start of next cell
		if ( xPos < w )
		    break;
		c++;
	    }
	    if ( cellMaxX )
		*cellMaxX = w - 1;
	    if ( cellMinX )
		*cellMinX = oldW;
	}
    }
    return c;
}


/*!
  Returns the index of the row at position \e yPos, where \e yPos is in
  \e widget coordinates.  Returns -1 if \e yPos is outside the valid
  range.

  \sa findCol(), rowYPos()
*/

int QTableView::findRow( int yPos ) const
{
    int cellMaxY;
    int row = findRawRow( yPos, &cellMaxY );
    if ( testTableFlags(Tbl_cutCellsV) && cellMaxY > maxViewY() )
	row = - 1;				//  cell cut by bottom margin
    if ( row >= nRows )
	row = -1;
    return row;
}


/*!
  Returns the index of the column at position \e xPos, where \e xPos is
  in \e widget coordinates.  Returns -1 if \e xPos is outside the valid
  range.

  \sa findRow(), colXPos()
*/

int QTableView::findCol( int xPos ) const
{
    int cellMaxX;
    int col = findRawCol( xPos, &cellMaxX );
    if ( testTableFlags(Tbl_cutCellsH) && cellMaxX > maxViewX() )
	col = - 1;				//  cell cut by right margin
    if ( col >= nCols )
	col = -1;
    return col;
}


/*!
  Computes the position in the widget of row \e row.

  Returns TRUE and stores the result in \e *yPos (in \e widget
  coordinates) if the row is visible.  Returns FALSE and does not modify
  \e *yPos if \e row is invisible or invalid.

  \sa colXPos(), findRow()
*/

bool QTableView::rowYPos( int row, int *yPos ) const
{
    int y;
    if ( row >= yCellOffs ) {
	if ( cellH ) {
	    int lastVisible = lastRowVisible();
	    if ( row > lastVisible || lastVisible == -1 )
		return FALSE;
	    y = (row - yCellOffs)*cellH + minViewY() - yCellDelta;
	} else {
	    //##arnt3
	    y = minViewY() - yCellDelta;	// y of leftmost cell in view
	    int r = yCellOffs;
	    QTableView *tw = (QTableView *)this;
	    int maxY = maxViewY();
	    while ( r < row && y <= maxY )
		y += tw->cellHeight( r++ );
	    if ( y > maxY )
		return FALSE;

	}
    } else {
	return FALSE;
    }
    if ( yPos )
	*yPos = y;
    return TRUE;
}


/*!
  Computes the position in the widget of column \e column.

  Returns TRUE and stores the result in \e *xPos (in \e widget
  coordinates) if the column is visible.  Returns FALSE and does not
  modify \e *xPos if \e col is invisible or invalid.

  \sa rowYPos(), findCol()
*/

bool QTableView::colXPos( int col, int *xPos ) const
{
    int x;
    if ( col >= xCellOffs ) {
	if ( cellW ) {
	    int lastVisible = lastColVisible();
	    if ( col > lastVisible || lastVisible == -1 )
		return FALSE;
	    x = (col - xCellOffs)*cellW + minViewX() - xCellDelta;
	} else {
	    //##arnt3
	    x = minViewX() - xCellDelta;	// x of uppermost cell in view
	    int c = xCellOffs;
	    QTableView *tw = (QTableView *)this;
	    int maxX = maxViewX();
	    while ( c < col && x <= maxX )
		x += tw->cellWidth( c++ );
	    if ( x > maxX )
		return FALSE;
	}
    } else {
	return FALSE;
    }
    if ( xPos )
	*xPos = x;
    return TRUE;
}


/*!
  Moves the visible area of the table rightwards by \e xPixels and
  downwards by \e yPixels pixels.  Both may be negative.

  \warning You might find that QScrollView offers a higher-level of
	functionality than using QTableView and this function.

  This function is \e not the same as QWidget::scroll(), in particular,
  the signs of \a xPixels and \a yPixels have the reverse semantics.

  \sa setXOffset(), setYOffset(), setOffset(), setTopCell(),
  setLeftCell(), setTopLeftOffset()
*/

void QTableView::scroll( int xPixels, int yPixels )
{