qmultilineedit.cpp

qtopia-phone-2.2.0下公共的控件实现源代码。

    int markEndX, markEndY;
    QRect oldContents = contentsRect();
    if ( getMarkedRegion( &markBeginY, &markBeginX, &markEndY, &markEndX ) ) {
	turnMark( FALSE );

	removeText( markBeginY, markBeginX, markEndY, markEndX );

	markAnchorY = markDragY = cursorY;
	markAnchorX = markDragX = cursorX;
    } else {
	if ( !atEnd() ) {
	    textDirty = TRUE;
	    d->edited = TRUE;
	    QMultiLineEditRow *r = contents->at( cursorY );
	    if ( cursorX == (int) r->s.length() ) { // remove newline
		QMultiLineEditRow* other = contents->at( cursorY + 1 );
		if ( ! r->newline && cursorX )
		    r->s.truncate( r->s.length()-1 );

		bool needBreak = !r->s.isEmpty();
		r->s += other->s;
		r->newline =  other->newline;
		contents->remove( cursorY + 1 );
		if ( needBreak )
		    rebreakParagraph( cursorY, 1 );
		else
		    wrapLine( cursorY, 1 );
	    } else {
		bool recalc = r->w == maxLineWidth();
		r->s.remove( cursorX, 1 );
		rebreakParagraph( cursorY );
		if ( recalc )
		    updateCellWidth();
	    }
	}
    }
    if ( DYNAMIC_WRAP && oldContents != contentsRect() ) {
	if ( oldContents.width() != contentsRect().width() ) {
	    bool oldAuto = autoUpdate();
	    setAutoUpdate( FALSE );
	    rebreakAll();
	    setAutoUpdate( oldAuto );
	}
	if ( autoUpdate() )
	    update();
    }
    curXPos  = 0;
    makeVisible();
}

/*!
  Moves the text cursor to the left end of the line. If \a mark is
  TRUE, text is marked towards the first position. If it is FALSE and
  the cursor is moved, all marked text is unmarked.

  \sa end()
*/

void QMultiLineEdit::home( bool mark )
{
    if ( cursorX != 0 ) {
	if ( mark && !hasMarkedText() ) {
	    markAnchorX    = cursorX;
	    markAnchorY    = cursorY;
	}
	d->blinkTimer->stop();
	cursorX = 0;
	cursorOn = TRUE;
	if ( mark )
	    newMark( cursorX, cursorY, FALSE );
	updateCell( cursorY, 0, FALSE );
	d->blinkTimer->start( QApplication::cursorFlashTime() / 2, FALSE );
    }
    curXPos  = 0;
    if ( !mark )
	turnMark( FALSE );
    makeVisible();
}

/*!
  Moves the text cursor to the right end of the line. If mark is TRUE
  text is marked towards the last position.  If it is FALSE and the
  cursor is moved, all marked text is unmarked.

  \sa home()
*/

void QMultiLineEdit::end( bool mark )
{
    int tlen = lineLength( cursorY );
    if ( cursorX != tlen ) {
	if ( mark && !hasMarkedText() ) {
	    markAnchorX    = cursorX;
	    markAnchorY    = cursorY;
	}
	d->blinkTimer->stop();
	cursorX = tlen;
	cursorOn  = TRUE;
	if ( mark )
	    newMark( cursorX, cursorY, FALSE );
	d->blinkTimer->start( QApplication::cursorFlashTime() / 2, FALSE );
	updateCell( cursorY, 0, FALSE );
    }
    curXPos  = 0;
    makeVisible();
    if ( !mark )
	turnMark( FALSE );
}

#ifndef QT_NO_QWS_IM
int  QMultiLineEdit::pixelPosToIMPos( const QPoint &p ) const
{
    int xPos, yPos;
    pixelPosToCursorPos( p, &xPos, &yPos );

    //count to find the position
    int clickPos = 0;
    if ( yPos > d->preeditEndY || 
	 yPos == d->preeditEndY && xPos > d->preeditEndX ) {
	xPos = d->preeditEndX;
	yPos = d->preeditEndY;
    }

	
    int x = d->preeditStartX;
    int y = d->preeditStartY;
	
    while ( y <= yPos ) {
	if ( y == yPos ) {
	    if ( x < xPos )
		clickPos += xPos - x;
	} else {
	    QString *s = getString( y );
	    int lineLen = s ? s->length() : 0;
	    clickPos += lineLen - x;
	}
	x = 0;
	y++;
    }
    return clickPos;
    
}
#endif


/*!\reimp
*/
void QMultiLineEdit::mousePressEvent( QMouseEvent *e )
{
#ifndef QT_NO_QWS_IM
    if ( composeMode() ) {
#if defined (_WS_QWS_)
	QPaintDevice::qwsDisplay()->sendIMMouseEvent( pixelPosToIMPos( e->pos() ), TRUE ); 

#endif
	
	return;
    }
#endif
#ifdef QT_KEYPAD_MODE
    if( qt_modalEditingEnabled ) {
	if ( e->button() == LeftButton && !isModalEditing() )
	    setModalEditing( TRUE );
    }
#endif

    stopAutoScroll();
    d->dnd_startpos = e->pos();

    if ( e->button() == RightButton ) {
	QPopupMenu *popup = new QPopupMenu( this );
	int id[ (int)IdCount ];
	id[ IdUndo ] = popup->insertItem( tr( "Undo" ) );
	id[ IdRedo ] = popup->insertItem( tr( "Redo" ) );
	popup->insertSeparator();
#ifndef QT_NO_CLIPBOARD
	id[ IdCut ] = popup->insertItem( tr( "Cut" ) );
	id[ IdCopy ] = popup->insertItem( tr( "Copy" ) );
	id[ IdPaste ] = popup->insertItem( tr( "Paste" ) );
#ifndef QT_NO_MIMECLIPBOARD
	id[ IdPasteSpecial ] = popup->insertItem( tr( "Paste special..." ) );
#endif
#endif
	id[ IdClear ] = popup->insertItem( tr( "Clear" ) );
	popup->insertSeparator();
	id[ IdSelectAll ] = popup->insertItem( tr( "Select All" ) );
	popup->setItemEnabled( id[ IdUndo ],
				  !this->d->undoList.isEmpty() );
	popup->setItemEnabled( id[ IdRedo ],
				  !this->d->redoList.isEmpty() );
#ifndef QT_NO_CLIPBOARD
	popup->setItemEnabled( id[ IdCut ],
			          !isReadOnly() && hasMarkedText() );
	popup->setItemEnabled( id[ IdCopy ], hasMarkedText() );
	popup->setItemEnabled( id[ IdPaste ],
	    !isReadOnly() && (bool)QApplication::clipboard()->text().length() );
#ifndef QT_NO_MIMECLIPBOARD
	// Any non-plain types?
	QMimeSource* ms = QApplication::clipboard()->data();
	bool ps = FALSE;
	if ( ms )  {
	    if ( !isReadOnly() ) {
		const char* fmt;
		for (int i=0; !ps && (fmt=ms->format(i)); i++) {
		    ps = qstrnicmp(fmt,"text/",5)==0
		      && qstrnicmp(fmt+5,"plain",5)!=0;
		}
	    }
	}
	popup->setItemEnabled( id[ IdPasteSpecial ], ps );
#endif
#endif
	popup->setItemEnabled( id[ IdClear ],
				  !isReadOnly() && (bool)text().length() );
	int allSelected = markIsOn && markAnchorX == 0 && markAnchorY == 0 &&
			  markDragY == numLines() - 1 && markDragX == lineLength( markDragY );
	popup->setItemEnabled( id[ IdSelectAll ],
				  (bool)text().length() && !allSelected );

	int r = popup->exec( e->globalPos() );
	delete popup;

	if ( r == id[ IdUndo ] )
	    undo();
	else if ( r == id[ IdRedo ] )
	    redo();
#ifndef QT_NO_CLIPBOARD
	else if ( r == id[ IdCut ] )
	    cut();
	else if ( r == id[ IdCopy ] )
	    copy();
	else if ( r == id[ IdPaste ] )
	    paste();
# ifndef QT_NO_MIMECLIPBOARD
	else if ( r == id[ IdPasteSpecial ] )
	    pasteSpecial(QCursor::pos());
# endif
#endif
	else if ( r == id[ IdClear ] )
	    clear();
	else if ( r == id[ IdSelectAll ] )
	    selectAll();
	return;
    }

    if ( e->button() != MidButton && e->button() != LeftButton)
	return;

    int newX, newY;
    pixelPosToCursorPos( e->pos(), &newX, &newY );

    if ( e->state() & ShiftButton ) {
	wordMark = FALSE;
	dragMarking    = TRUE;
	setCursorPosition( newY, newX, TRUE);
	return;
    }

#ifndef QT_NO_DRAGANDDROP
    if (
	inMark(newX, newY)		// Click on highlighted text
	&& echoMode() == Normal		// No DnD of passwords, etc.
	&& e->pos().y() < totalHeight() // Click past the end is not dragging
	)
    {
	// The user might be trying to drag
	d->dnd_primed = TRUE;
	d->dnd_timer->start( QApplication::startDragTime(), FALSE );
    } else
#endif
    {
	wordMark = FALSE;
	dragMarking    = TRUE;
	setCursorPixelPosition(e->pos());
    }
}

void QMultiLineEdit::pixelPosToCursorPos(QPoint p, int* x, int* y) const
{
    *y = findRow( p.y() );
    if ( *y < 0 ) {
	if ( p.y() < lineWidth() ) {
	    *y = topCell();
	} else {
	    *y = lastRowVisible();
	    p.setX(cellWidth());
	}
    }
    *y = QMIN( (int)contents->count() - 1, *y );
    QFontMetrics fm( font() );
    *x = xPosToCursorPos( stringShown( *y ), fm,
			  p.x() - d->lr_marg + xOffset(),
			  cellWidth() - 2 * d->lr_marg - d->marg_extra,
			  d->align );
    QMultiLineEditRow* r = contents->at( *y );
    if (r && !r->newline && ((unsigned int)*x == r->s.length()) && (*x > 0))
	--*x;
}

void QMultiLineEdit::setCursorPixelPosition(QPoint p, bool clear_mark)
{
    int newX, newY;
    pixelPosToCursorPos( p, &newX, &newY );
#ifdef QT_KEYPAD_MODE
    if( qt_modalEditingEnabled ) {
	while (d->extraNewLineCount > 0 && cursorY == numLines() - 1
	    && lineLength(cursorY) == 0 && cursorX == 0 && cursorY > newY) {
	    backspace();
	}
    }
#endif
    cursorX = newX;
    curXPos        = 0;
    if ( clear_mark ) {
	markAnchorX    = cursorX;
	markAnchorY    = newY;
	bool markWasOn = markIsOn;
	turnMark( FALSE );
	if ( markWasOn ) {
	    cursorY = newY;
	    update();
	    d->isHandlingEvent = FALSE;
	    return;
	}
    }
    if ( cursorY != newY ) {
	int oldY = cursorY;
	cursorY = newY;
	updateCell( oldY, 0, FALSE );
    }
    updateCell( cursorY, 0, FALSE );		// ###
}

void QMultiLineEdit::startAutoScroll()
{
    if ( !dragScrolling ) {
	d->scrollTime = initialScrollTime;
	d->scrollAccel = initialScrollAccel;
	d->scrollTimer->start( d->scrollTime, FALSE );
	dragScrolling = TRUE;
    }
}

void QMultiLineEdit::stopAutoScroll()
{
    if ( dragScrolling ) {
	d->scrollTimer->stop();
	dragScrolling = FALSE;
    }
}

/*!\reimp
*/
void QMultiLineEdit::mouseMoveEvent( QMouseEvent *e )
{
#ifndef QT_NO_QWS_IM
    if ( composeMode() ) {
	return;
    }
#endif

#ifndef QT_NO_DRAGANDDROP
    d->dnd_timer->stop();
    if ( d->dnd_primed &&
	 ( d->dnd_startpos - e->pos() ).manhattanLength() > QApplication::startDragDistance() ) {
	doDrag();
	return;
    }
#endif
    if ( !dragMarking )
	return;
    if ( rect().contains( e->pos() ) ) {
	stopAutoScroll();
    } else if ( !dragScrolling ) {
	startAutoScroll();
    }

    int newX, newY;
    pixelPosToCursorPos(e->pos(), &newX, &newY);

    if ( wordMark ) {
	extendSelectionWord( newX, newY);
    }

    if ( markDragX == newX && markDragY == newY )
	return;
    int oldY = markDragY;
    newMark( newX, newY, FALSE );
    for ( int i = QMIN(oldY,newY); i <= QMAX(oldY,newY); i++ )
	updateCell( i, 0, FALSE );
}

void QMultiLineEdit::extendSelectionWord( int &newX, int&newY)
{
    QString s = stringShown( newY );
    int lim = s.length();
    if ( newX >= 0 && newX < lim ) {
	int i = newX;
	int startclass = charClass(s.at(i));
	if ( markAnchorY < markDragY ||
	     ( markAnchorY == markDragY && markAnchorX < markDragX ) ) {
	    // going right
	    while ( i < lim && charClass(s.at(i)) == startclass )
		i++;
	} else {
	    // going left
	    while ( i >= 0 && charClass(s.at(i)) == startclass )
		i--;
	    i++;
	}
	newX = i;
    }
}




/*!\reimp
*/
void QMultiLineEdit::mouseReleaseEvent( QMouseEvent *e )
{
#ifndef QT_NO_QWS_IM
    if ( composeMode() ) {
#if defined (_WS_QWS_)
	QPaintDevice::qwsDisplay()->sendIMMouseEvent( pixelPosToIMPos( e->pos() ), FALSE ); 

#endif
	
	return;
    }
#endif

    stopAutoScroll();
#ifndef QT_NO_DRAGANDDROP
    if ( d->dnd_timer->isActive() ) {
	d->dnd_timer->stop();
	d->dnd_primed = FALSE;
	setCursorPixelPosition(e->pos());
    }
#endif
    wordMark = FALSE;
    dragMarking   = FALSE;
    textDirty = FALSE;
    d->isHandlingEvent = TRUE;
    if ( markAnchorY == markDragY && markAnchorX == markDragX )
	turnMark( FALSE );

#ifndef QT_NO_CLIPBOARD
#if defined(_WS_X11_)
    else if ( echoMode() == Normal )
	copy();
#endif

    if ( e->button() == MidButton && !readOnly ) {
#if defined(_WS_X11_)
	paste();		// Will repaint the cursor line.
#else
	if ( style() == MotifStyle )
	    paste();
#endif
    }
#endif

    d->isHandlingEvent = FALSE;

    if ( !readOnly && textDirty )
	emit textChanged();
}


/*!\reimp
*/
void QMultiLineEdit::mouseDoubleClickEvent( QMouseEvent *m )
{
#ifndef QT_NO_QWS_IM
    if ( composeMode() ) {
	return;
    }
#endif
    if ( m->button() == LeftButton ) {
	if ( m->state() & ShiftButton ) {
	    int newX = cursorX;
	    int newY = cursorY;
	    extendSelectionWord( newX, newY);
	    newMark( newX, newY, FALSE );
	} else {
	    markWord( cursorX, cursorY );
	}
	dragMarking    = TRUE;
	wordMark = TRUE;
	updateCell( cursorY, 0, FALSE );

    }
}

#ifndef QT_NO_DRAGANDDROP

/*!
  \reimp
*/

void QMultiLineEdit::dragEnterEvent( QDragEnterEvent * )
{
    cursorOn = TRUE;
    updateCell( cursorY, 0, FALSE );
}

/*!\reimp
*/
void QMultiLineEdit::dragMoveEvent( QDragMoveEvent* event )
{
    if ( readOnly ) return;
    event->accept( QTextDrag::canDecode(event) );
    d->dnd_forcecursor = TRUE;
    setCursorPixelPosition(event->pos(), FALSE);
    d->dnd_forcecursor = FALSE;
    QRect inside_margin(scroll_margin, scroll_margin,
			width()-scroll_margin*2, height()-scroll_margin*2);
    if ( !inside_margin.contains(event->pos()) ) {
	startAutoScroll();
    }
    if ( event->source() == this && event->action() == QDropEvent::Move )
	event->acceptAction();
}

/*!\reimp
*/
void QMultiLineEdit::dragLeaveEvent( QDragLeaveEvent* )
{
    if ( cursorOn ) {
	cursorOn = FALSE;
	updateCell( cursorY, 0, FALSE