Diffstat (limited to 'inputmethods/handwriting/qimpenwidget.cpp') (more/less context) (ignore whitespace changes)
| -rw-r--r-- | inputmethods/handwriting/qimpenwidget.cpp | 446 |
1 files changed, 446 insertions, 0 deletions
diff --git a/inputmethods/handwriting/qimpenwidget.cpp b/inputmethods/handwriting/qimpenwidget.cpp new file mode 100644 index 0000000..8f8f582 --- a/dev/null +++ b/inputmethods/handwriting/qimpenwidget.cpp @@ -0,0 +1,446 @@ +/********************************************************************** +** Copyright (C) 2000 Trolltech AS. All rights reserved. +** +** This file is part of Qtopia Environment. +** +** This file may be distributed and/or modified under the terms of the +** GNU General Public License version 2 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. +** +** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE +** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. +** +** See http://www.trolltech.com/gpl/ for GPL licensing information. +** +** Contact info@trolltech.com if any conditions of this licensing are +** not clear to you. +** +**********************************************************************/ + +#include <qapplication.h> +#include <qinputdialog.h> +#include <qpainter.h> +#include <qfile.h> +#include <qdatastream.h> +#include <qtimer.h> +#include "qimpenchar.h" +#include "qimpenwidget.h" + +#define TITLE_WIDTH 30 // ### magic + +/*! + \class QIMPenWidget qimpenwidget.h + + Draws characters and allows input of characters. +*/ + +QIMPenWidget::QIMPenWidget( QWidget *parent ) + : QWidget( parent ) +{ + charSets.setAutoDelete( TRUE ); + inputStroke = 0; + outputChar = 0; + outputStroke = 0; + mode = Waiting; + currCharSet = 0; + readOnly = FALSE; + strokes.setAutoDelete( TRUE ); + + timer = new QTimer(this); + connect( timer, SIGNAL(timeout()), SLOT(timeout())); + + setBackgroundColor( qApp->palette().color( QPalette::Active, + QColorGroup::Base ) ); + strokeColor = black; + setFixedHeight( 75 ); +} + +void QIMPenWidget::clear() +{ + timer->stop(); + mode = Waiting; + QRect r( dirtyRect ); + QIMPenStrokeIterator it( strokes ); + while ( it.current() ) { + r |= it.current()->boundingRect(); + ++it; + } + outputChar = 0; + outputStroke = 0; + strokes.clear(); + if ( !r.isNull() ) { + r.moveBy( -2, -2 ); + r.setSize( r.size() + QSize( 4, 4 ) ); + repaint( r ); + } else { + repaint(); + } +} + +void QIMPenWidget::removeStroke() +{ + QRect r( dirtyRect ); + QIMPenStroke *st = strokes.getFirst(); + QRect strokeRect; + if ( st ) + strokeRect = st->boundingRect(); + r |= strokeRect; + strokes.removeFirst(); + if ( !r.isNull() ) { + r.moveBy( -2, -2 ); + r.setSize( r.size() + QSize( 4, 4 ) ); + repaint( r ); + } +} + +void QIMPenWidget::greyStroke() +{ + QRect r( dirtyRect ); + QIMPenStroke *st = strokes.getLast(); + QRect strokeRect; + if ( st ) + strokeRect = st->boundingRect(); + r |= strokeRect; + QColor oldCol = strokeColor; + strokeColor = gray; + if ( !r.isNull() ) { + r.moveBy( -2, -2 ); + r.setSize( r.size() + QSize( 4, 4 ) ); + repaint( r ); + } + strokeColor = oldCol; +} + +/*! + Insert a character set into the list. +*/ +void QIMPenWidget::insertCharSet( QIMPenCharSet *cs, int stretch, int pos ) +{ + CharSetEntry *e = new CharSetEntry; + e->cs = cs; + e->stretch = stretch; + if ( pos < 0 ) + pos = charSets.count(); + charSets.insert( pos, e ); + currCharSet = 0; + emit changeCharSet( currCharSet ); + emit changeCharSet( charSets.at(currCharSet)->cs ); + totalStretch = 0; + CharSetEntryIterator it( charSets ); + for ( ; it.current(); ++it ) + totalStretch += it.current()->stretch; + update(); +} + +/*! + Remove a character set from the list. +*/ +void QIMPenWidget::removeCharSet( int pos ) +{ + if ( pos >= 0 && pos < (int)charSets.count() ) { + charSets.remove( pos ); + currCharSet = 0; + if ( charSets.count() ) { + emit changeCharSet( currCharSet ); + emit changeCharSet( charSets.at(currCharSet)->cs ); + } + totalStretch = 0; + CharSetEntryIterator it( charSets ); + for ( ; it.current(); ++it ) + totalStretch += it.current()->stretch; + update(); + } +} + +void QIMPenWidget::changeCharSet( QIMPenCharSet *cs, int pos ) +{ + if ( pos >= 0 && pos < (int)charSets.count() ) { + CharSetEntry *e = new CharSetEntry; + e->cs = cs; + e->stretch = charSets.at(pos)->stretch; + charSets.remove( pos ); + charSets.insert( pos, e ); + if ( pos == currCharSet ) { + emit changeCharSet( charSets.at(currCharSet)->cs ); + } + update(); + } +} + +void QIMPenWidget::clearCharSets() +{ + charSets.clear(); + currCharSet = 0; + update(); +} + +/*! + Display a character. \a speed determines how quickly the character is + drawn. +*/ +void QIMPenWidget::showCharacter( QIMPenChar *ch, int speed ) +{ + outputChar = 0; + outputStroke = 0; + strokes.clear(); + mode = Output; + repaint(); + if ( !ch || ch->isEmpty() ) { + mode = Waiting; + return; + } + + outputChar = ch; + outputStroke = outputChar->penStrokes().getFirst(); + if ( speed < 0 ) speed = 0; + if ( speed > 20 ) speed = 20; + speed = 50 - speed; + pointIndex = 0; + strokeIndex = 0; + lastPoint = outputStroke->startingPoint(); + QRect br( outputChar->boundingRect() ); + lastPoint.setX( (width() - br.width()) / 2 + (lastPoint.x () - br.left()) ); + QPoint offset = lastPoint - outputStroke->startingPoint(); + br.moveBy( offset.x(), offset.y() ); + dirtyRect |= br; + timer->start( speed ); +} + +/*! + Handle drawing/clearing of characters. +*/ +void QIMPenWidget::timeout() +{ + if ( mode == Output ) { + const QArray<QIMPenGlyphLink> &chain = outputStroke->chain(); + if ( pointIndex < chain.count() ) { + QPainter paint( this ); + paint.setBrush( Qt::black ); + for ( unsigned i = 0; i < 3 && pointIndex < chain.count(); i++ ) { + lastPoint.rx() += chain[pointIndex].dx; + lastPoint.ry() += chain[pointIndex].dy; + pointIndex++; + paint.drawRect( lastPoint.x()-1, lastPoint.y()-1, 2, 2 ); + } + } + if ( pointIndex >= chain.count() ) { + QIMPenStrokeList strokes = outputChar->penStrokes(); + if ( strokeIndex < (int)strokes.count() - 1 ) { + pointIndex = 0; + strokeIndex++; + outputStroke = strokes.at( strokeIndex ); + lastPoint = outputChar->startingPoint(); + QRect br( outputChar->boundingRect() ); + lastPoint.setX( (width() - br.width()) / 2 + + (lastPoint.x () - br.left()) ); + QPoint off = lastPoint - outputChar->startingPoint(); + lastPoint = outputStroke->startingPoint() + off; + } else { + timer->stop(); + mode = Waiting; + } + } + } else if ( mode == Waiting ) { + QRect r( dirtyRect ); + if ( !r.isNull() ) { + r.moveBy( -2, -2 ); + r.setSize( r.size() + QSize( 4, 4 ) ); + repaint( r ); + } + } +} + +/*! + If the point \a p is over one of the character set titles, switch + to the set and return TRUE. +*/ +bool QIMPenWidget::selectSet( QPoint p ) +{ + if ( charSets.count() ) { + CharSetEntryIterator it( charSets ); + int spos = 0; + int idx = 0; + for ( ; it.current(); ++it, idx++ ) { + int setWidth = width() * it.current()->stretch / totalStretch; + spos += setWidth; + if ( p.x() < spos ) { + if ( idx != currCharSet ) { + currCharSet = idx; + update( 0, 0, width(), 12 ); + emit changeCharSet( currCharSet ); + emit changeCharSet( charSets.at(currCharSet)->cs ); + } + break; + } + } + } + + return FALSE; +} + +/*! + Hopefully returns a sensible size. +*/ +QSize QIMPenWidget::sizeHint() +{ + return QSize( TITLE_WIDTH * charSets.count(), 75 ); +} + +void QIMPenWidget::mousePressEvent( QMouseEvent *e ) +{ + if ( !readOnly && e->button() == LeftButton && mode == Waiting ) { + // if selectSet returns false the click was not over the + // char set selectors. + if ( !selectSet( e->pos() ) ) { + // start of character input + timer->stop(); + if ( outputChar ) { + outputChar = 0; + outputStroke = 0; + repaint(); + } + mode = Input; + lastPoint = e->pos(); + emit beginStroke(); + inputStroke = new QIMPenStroke; + strokes.append( inputStroke ); + inputStroke->beginInput( e->pos() ); + QPainter paint( this ); + paint.setBrush( Qt::black ); + paint.drawRect( lastPoint.x()-1, lastPoint.y()-1, 2, 2 ); + } + } +} + +void QIMPenWidget::mouseReleaseEvent( QMouseEvent *e ) +{ + if ( !readOnly && e->button() == LeftButton && mode == Input ) { + mode = Waiting; + inputStroke->endInput(); + if ( charSets.count() ) + emit stroke( inputStroke ); + inputStroke = 0; + } +} + +void QIMPenWidget::mouseMoveEvent( QMouseEvent *e ) +{ + if ( !readOnly && mode == Input ) { + int dx = QABS( e->pos().x() - lastPoint.x() ); + int dy = QABS( e->pos().y() - lastPoint.y() ); + if ( dx + dy > 1 ) { + if ( inputStroke->addPoint( e->pos() ) ) { + QPainter paint( this ); + paint.setPen( Qt::black ); + paint.setBrush( Qt::black ); + const QArray<QIMPenGlyphLink> &chain = inputStroke->chain(); + QPoint p( e->pos() ); + for ( int i = (int)chain.count()-1; i >= 0; i-- ) { + paint.drawRect( p.x()-1, p.y()-1, 2, 2 ); + p.rx() -= chain[i].dx; + p.ry() -= chain[i].dy; + if ( p == lastPoint ) + break; + } + + /* ### use this when thick lines work properly on all devices + paint.setPen( QPen( Qt::black, 2 ) ); + paint.drawLine( lastPoint, e->pos() ); + */ + } + lastPoint = e->pos(); + } + } +} + +void QIMPenWidget::paintEvent( QPaintEvent * ) +{ + QPainter paint( this ); + + // draw guidelines + paint.setPen( Qt::gray ); + paint.drawLine( 0, 0, width(), 0 ); + int y = height() / 3; + paint.drawLine( 0, y, width(), y ); + y *= 2; + paint.setPen( blue ); + paint.drawLine( 0, y, width(), y ); + paint.setPen( Qt::gray ); + + if ( !charSets.count() ) + return; + + // draw the character set titles + QFont selFont( "helvetica", 8, QFont::Bold ); + QFont font( "helvetica", 8 ); + CharSetEntryIterator it( charSets ); + int spos = 0; + for ( ; it.current(); ++it ) { + int setWidth = width() * it.current()->stretch / totalStretch; + spos += setWidth; + if ( it.current() != charSets.getLast() ) { + paint.drawLine( spos, 0, spos, 5 ); + paint.drawLine( spos, height()-1, spos, height()-6 ); + } + paint.setFont( font ); + int w = paint.fontMetrics().width( it.current()->cs->title() ); + int tpos = spos - setWidth / 2; + paint.drawText( tpos - w/2, 0, w, 12, QPainter::AlignCenter, + it.current()->cs->title() ); + } + + // draw any character that should be displayed when repainted. + QPoint off; + const QIMPenStrokeList *stk = 0; + if ( outputChar && mode == Waiting ) { + stk = &outputChar->penStrokes(); + QPoint p( outputChar->startingPoint() ); + QRect br( outputChar->boundingRect() ); + p.setX( (width() - br.width()) / 2 + (p.x () - br.left()) ); + off = p - outputChar->startingPoint(); + } else if ( mode == Waiting ) { + stk = &strokes; + strokeColor = gray; + } + + if ( stk && !stk->isEmpty() ) { + paint.setPen( strokeColor ); + paint.setBrush( strokeColor ); + QIMPenStrokeIterator it( *stk ); + while ( it.current() ) { + QPoint p = it.current()->startingPoint() + off; + paint.drawRect( p.x()-1, p.y()-1, 2, 2 ); + const QArray<QIMPenGlyphLink> &chain = it.current()->chain(); + for ( unsigned i = 0; i < chain.count(); i++ ) { + p.rx() += chain[i].dx; + p.ry() += chain[i].dy; + paint.drawRect( p.x()-1, p.y()-1, 2, 2 ); + } + ++it; + if ( it.atLast() && mode == Waiting ) + strokeColor = black; + } + } + + dirtyRect = QRect(); + + // debug +/* + if ( input ) { + QArray<int> sig = input->sig(); + for ( unsigned i = 0; i < sig.count(); i++ ) { + paint.drawPoint( 200 + i, height()/2 - sig[i] / 8 ); + } + } +*/ +} + +void QIMPenWidget::resizeEvent( QResizeEvent *e ) +{ + if ( mode == Output ) + showCharacter( outputChar, 0 ); + + QWidget::resizeEvent( e ); +} + |