Diffstat (limited to 'inputmethods/handwriting/qimpenwidget.cpp') (more/less context) (ignore whitespace changes)
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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 | |||
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1 | /********************************************************************** | ||
2 | ** Copyright (C) 2000 Trolltech AS. All rights reserved. | ||
3 | ** | ||
4 | ** This file is part of Qtopia Environment. | ||
5 | ** | ||
6 | ** This file may be distributed and/or modified under the terms of the | ||
7 | ** GNU General Public License version 2 as published by the Free Software | ||
8 | ** Foundation and appearing in the file LICENSE.GPL included in the | ||
9 | ** packaging of this file. | ||
10 | ** | ||
11 | ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE | ||
12 | ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. | ||
13 | ** | ||
14 | ** See http://www.trolltech.com/gpl/ for GPL licensing information. | ||
15 | ** | ||
16 | ** Contact info@trolltech.com if any conditions of this licensing are | ||
17 | ** not clear to you. | ||
18 | ** | ||
19 | **********************************************************************/ | ||
20 | |||
21 | #include <qapplication.h> | ||
22 | #include <qinputdialog.h> | ||
23 | #include <qpainter.h> | ||
24 | #include <qfile.h> | ||
25 | #include <qdatastream.h> | ||
26 | #include <qtimer.h> | ||
27 | #include "qimpenchar.h" | ||
28 | #include "qimpenwidget.h" | ||
29 | |||
30 | #define TITLE_WIDTH30 // ### magic | ||
31 | |||
32 | /*! | ||
33 | \class QIMPenWidget qimpenwidget.h | ||
34 | |||
35 | Draws characters and allows input of characters. | ||
36 | */ | ||
37 | |||
38 | QIMPenWidget::QIMPenWidget( QWidget *parent ) | ||
39 | : QWidget( parent ) | ||
40 | { | ||
41 | charSets.setAutoDelete( TRUE ); | ||
42 | inputStroke = 0; | ||
43 | outputChar = 0; | ||
44 | outputStroke = 0; | ||
45 | mode = Waiting; | ||
46 | currCharSet = 0; | ||
47 | readOnly = FALSE; | ||
48 | strokes.setAutoDelete( TRUE ); | ||
49 | |||
50 | timer = new QTimer(this); | ||
51 | connect( timer, SIGNAL(timeout()), SLOT(timeout())); | ||
52 | |||
53 | setBackgroundColor( qApp->palette().color( QPalette::Active, | ||
54 | QColorGroup::Base ) ); | ||
55 | strokeColor = black; | ||
56 | setFixedHeight( 75 ); | ||
57 | } | ||
58 | |||
59 | void QIMPenWidget::clear() | ||
60 | { | ||
61 | timer->stop(); | ||
62 | mode = Waiting; | ||
63 | QRect r( dirtyRect ); | ||
64 | QIMPenStrokeIterator it( strokes ); | ||
65 | while ( it.current() ) { | ||
66 | r |= it.current()->boundingRect(); | ||
67 | ++it; | ||
68 | } | ||
69 | outputChar = 0; | ||
70 | outputStroke = 0; | ||
71 | strokes.clear(); | ||
72 | if ( !r.isNull() ) { | ||
73 | r.moveBy( -2, -2 ); | ||
74 | r.setSize( r.size() + QSize( 4, 4 ) ); | ||
75 | repaint( r ); | ||
76 | } else { | ||
77 | repaint(); | ||
78 | } | ||
79 | } | ||
80 | |||
81 | void QIMPenWidget::removeStroke() | ||
82 | { | ||
83 | QRect r( dirtyRect ); | ||
84 | QIMPenStroke *st = strokes.getFirst(); | ||
85 | QRect strokeRect; | ||
86 | if ( st ) | ||
87 | strokeRect = st->boundingRect(); | ||
88 | r |= strokeRect; | ||
89 | strokes.removeFirst(); | ||
90 | if ( !r.isNull() ) { | ||
91 | r.moveBy( -2, -2 ); | ||
92 | r.setSize( r.size() + QSize( 4, 4 ) ); | ||
93 | repaint( r ); | ||
94 | } | ||
95 | } | ||
96 | |||
97 | void QIMPenWidget::greyStroke() | ||
98 | { | ||
99 | QRect r( dirtyRect ); | ||
100 | QIMPenStroke *st = strokes.getLast(); | ||
101 | QRect strokeRect; | ||
102 | if ( st ) | ||
103 | strokeRect = st->boundingRect(); | ||
104 | r |= strokeRect; | ||
105 | QColor oldCol = strokeColor; | ||
106 | strokeColor = gray; | ||
107 | if ( !r.isNull() ) { | ||
108 | r.moveBy( -2, -2 ); | ||
109 | r.setSize( r.size() + QSize( 4, 4 ) ); | ||
110 | repaint( r ); | ||
111 | } | ||
112 | strokeColor = oldCol; | ||
113 | } | ||
114 | |||
115 | /*! | ||
116 | Insert a character set into the list. | ||
117 | */ | ||
118 | void QIMPenWidget::insertCharSet( QIMPenCharSet *cs, int stretch, int pos ) | ||
119 | { | ||
120 | CharSetEntry *e = new CharSetEntry; | ||
121 | e->cs = cs; | ||
122 | e->stretch = stretch; | ||
123 | if ( pos < 0 ) | ||
124 | pos = charSets.count(); | ||
125 | charSets.insert( pos, e ); | ||
126 | currCharSet = 0; | ||
127 | emit changeCharSet( currCharSet ); | ||
128 | emit changeCharSet( charSets.at(currCharSet)->cs ); | ||
129 | totalStretch = 0; | ||
130 | CharSetEntryIterator it( charSets ); | ||
131 | for ( ; it.current(); ++it ) | ||
132 | totalStretch += it.current()->stretch; | ||
133 | update(); | ||
134 | } | ||
135 | |||
136 | /*! | ||
137 | Remove a character set from the list. | ||
138 | */ | ||
139 | void QIMPenWidget::removeCharSet( int pos ) | ||
140 | { | ||
141 | if ( pos >= 0 && pos < (int)charSets.count() ) { | ||
142 | charSets.remove( pos ); | ||
143 | currCharSet = 0; | ||
144 | if ( charSets.count() ) { | ||
145 | emit changeCharSet( currCharSet ); | ||
146 | emit changeCharSet( charSets.at(currCharSet)->cs ); | ||
147 | } | ||
148 | totalStretch = 0; | ||
149 | CharSetEntryIterator it( charSets ); | ||
150 | for ( ; it.current(); ++it ) | ||
151 | totalStretch += it.current()->stretch; | ||
152 | update(); | ||
153 | } | ||
154 | } | ||
155 | |||
156 | void QIMPenWidget::changeCharSet( QIMPenCharSet *cs, int pos ) | ||
157 | { | ||
158 | if ( pos >= 0 && pos < (int)charSets.count() ) { | ||
159 | CharSetEntry *e = new CharSetEntry; | ||
160 | e->cs = cs; | ||
161 | e->stretch = charSets.at(pos)->stretch; | ||
162 | charSets.remove( pos ); | ||
163 | charSets.insert( pos, e ); | ||
164 | if ( pos == currCharSet ) { | ||
165 | emit changeCharSet( charSets.at(currCharSet)->cs ); | ||
166 | } | ||
167 | update(); | ||
168 | } | ||
169 | } | ||
170 | |||
171 | void QIMPenWidget::clearCharSets() | ||
172 | { | ||
173 | charSets.clear(); | ||
174 | currCharSet = 0; | ||
175 | update(); | ||
176 | } | ||
177 | |||
178 | /*! | ||
179 | Display a character. \a speed determines how quickly the character is | ||
180 | drawn. | ||
181 | */ | ||
182 | void QIMPenWidget::showCharacter( QIMPenChar *ch, int speed ) | ||
183 | { | ||
184 | outputChar = 0; | ||
185 | outputStroke = 0; | ||
186 | strokes.clear(); | ||
187 | mode = Output; | ||
188 | repaint(); | ||
189 | if ( !ch || ch->isEmpty() ) { | ||
190 | mode = Waiting; | ||
191 | return; | ||
192 | } | ||
193 | |||
194 | outputChar = ch; | ||
195 | outputStroke = outputChar->penStrokes().getFirst(); | ||
196 | if ( speed < 0 ) speed = 0; | ||
197 | if ( speed > 20 ) speed = 20; | ||
198 | speed = 50 - speed; | ||
199 | pointIndex = 0; | ||
200 | strokeIndex = 0; | ||
201 | lastPoint = outputStroke->startingPoint(); | ||
202 | QRect br( outputChar->boundingRect() ); | ||
203 | lastPoint.setX( (width() - br.width()) / 2 + (lastPoint.x () - br.left()) ); | ||
204 | QPoint offset = lastPoint - outputStroke->startingPoint(); | ||
205 | br.moveBy( offset.x(), offset.y() ); | ||
206 | dirtyRect |= br; | ||
207 | timer->start( speed ); | ||
208 | } | ||
209 | |||
210 | /*! | ||
211 | Handle drawing/clearing of characters. | ||
212 | */ | ||
213 | void QIMPenWidget::timeout() | ||
214 | { | ||
215 | if ( mode == Output ) { | ||
216 | const QArray<QIMPenGlyphLink> &chain = outputStroke->chain(); | ||
217 | if ( pointIndex < chain.count() ) { | ||
218 | QPainter paint( this ); | ||
219 | paint.setBrush( Qt::black ); | ||
220 | for ( unsigned i = 0; i < 3 && pointIndex < chain.count(); i++ ) { | ||
221 | lastPoint.rx() += chain[pointIndex].dx; | ||
222 | lastPoint.ry() += chain[pointIndex].dy; | ||
223 | pointIndex++; | ||
224 | paint.drawRect( lastPoint.x()-1, lastPoint.y()-1, 2, 2 ); | ||
225 | } | ||
226 | } | ||
227 | if ( pointIndex >= chain.count() ) { | ||
228 | QIMPenStrokeList strokes = outputChar->penStrokes(); | ||
229 | if ( strokeIndex < (int)strokes.count() - 1 ) { | ||
230 | pointIndex = 0; | ||
231 | strokeIndex++; | ||
232 | outputStroke = strokes.at( strokeIndex ); | ||
233 | lastPoint = outputChar->startingPoint(); | ||
234 | QRect br( outputChar->boundingRect() ); | ||
235 | lastPoint.setX( (width() - br.width()) / 2 | ||
236 | + (lastPoint.x () - br.left()) ); | ||
237 | QPoint off = lastPoint - outputChar->startingPoint(); | ||
238 | lastPoint = outputStroke->startingPoint() + off; | ||
239 | } else { | ||
240 | timer->stop(); | ||
241 | mode = Waiting; | ||
242 | } | ||
243 | } | ||
244 | } else if ( mode == Waiting ) { | ||
245 | QRect r( dirtyRect ); | ||
246 | if ( !r.isNull() ) { | ||
247 | r.moveBy( -2, -2 ); | ||
248 | r.setSize( r.size() + QSize( 4, 4 ) ); | ||
249 | repaint( r ); | ||
250 | } | ||
251 | } | ||
252 | } | ||
253 | |||
254 | /*! | ||
255 | If the point \a p is over one of the character set titles, switch | ||
256 | to the set and return TRUE. | ||
257 | */ | ||
258 | bool QIMPenWidget::selectSet( QPoint p ) | ||
259 | { | ||
260 | if ( charSets.count() ) { | ||
261 | CharSetEntryIterator it( charSets ); | ||
262 | int spos = 0; | ||
263 | int idx = 0; | ||
264 | for ( ; it.current(); ++it, idx++ ) { | ||
265 | int setWidth = width() * it.current()->stretch / totalStretch; | ||
266 | spos += setWidth; | ||
267 | if ( p.x() < spos ) { | ||
268 | if ( idx != currCharSet ) { | ||
269 | currCharSet = idx; | ||
270 | update( 0, 0, width(), 12 ); | ||
271 | emit changeCharSet( currCharSet ); | ||
272 | emit changeCharSet( charSets.at(currCharSet)->cs ); | ||
273 | } | ||
274 | break; | ||
275 | } | ||
276 | } | ||
277 | } | ||
278 | |||
279 | return FALSE; | ||
280 | } | ||
281 | |||
282 | /*! | ||
283 | Hopefully returns a sensible size. | ||
284 | */ | ||
285 | QSize QIMPenWidget::sizeHint() | ||
286 | { | ||
287 | return QSize( TITLE_WIDTH * charSets.count(), 75 ); | ||
288 | } | ||
289 | |||
290 | void QIMPenWidget::mousePressEvent( QMouseEvent *e ) | ||
291 | { | ||
292 | if ( !readOnly && e->button() == LeftButton && mode == Waiting ) { | ||
293 | // if selectSet returns false the click was not over the | ||
294 | // char set selectors. | ||
295 | if ( !selectSet( e->pos() ) ) { | ||
296 | // start of character input | ||
297 | timer->stop(); | ||
298 | if ( outputChar ) { | ||
299 | outputChar = 0; | ||
300 | outputStroke = 0; | ||
301 | repaint(); | ||
302 | } | ||
303 | mode = Input; | ||
304 | lastPoint = e->pos(); | ||
305 | emit beginStroke(); | ||
306 | inputStroke = new QIMPenStroke; | ||
307 | strokes.append( inputStroke ); | ||
308 | inputStroke->beginInput( e->pos() ); | ||
309 | QPainter paint( this ); | ||
310 | paint.setBrush( Qt::black ); | ||
311 | paint.drawRect( lastPoint.x()-1, lastPoint.y()-1, 2, 2 ); | ||
312 | } | ||
313 | } | ||
314 | } | ||
315 | |||
316 | void QIMPenWidget::mouseReleaseEvent( QMouseEvent *e ) | ||
317 | { | ||
318 | if ( !readOnly && e->button() == LeftButton && mode == Input ) { | ||
319 | mode = Waiting; | ||
320 | inputStroke->endInput(); | ||
321 | if ( charSets.count() ) | ||
322 | emit stroke( inputStroke ); | ||
323 | inputStroke = 0; | ||
324 | } | ||
325 | } | ||
326 | |||
327 | void QIMPenWidget::mouseMoveEvent( QMouseEvent *e ) | ||
328 | { | ||
329 | if ( !readOnly && mode == Input ) { | ||
330 | int dx = QABS( e->pos().x() - lastPoint.x() ); | ||
331 | int dy = QABS( e->pos().y() - lastPoint.y() ); | ||
332 | if ( dx + dy > 1 ) { | ||
333 | if ( inputStroke->addPoint( e->pos() ) ) { | ||
334 | QPainter paint( this ); | ||
335 | paint.setPen( Qt::black ); | ||
336 | paint.setBrush( Qt::black ); | ||
337 | const QArray<QIMPenGlyphLink> &chain = inputStroke->chain(); | ||
338 | QPoint p( e->pos() ); | ||
339 | for ( int i = (int)chain.count()-1; i >= 0; i-- ) { | ||
340 | paint.drawRect( p.x()-1, p.y()-1, 2, 2 ); | ||
341 | p.rx() -= chain[i].dx; | ||
342 | p.ry() -= chain[i].dy; | ||
343 | if ( p == lastPoint ) | ||
344 | break; | ||
345 | } | ||
346 | |||
347 | /* ### use this when thick lines work properly on all devices | ||
348 | paint.setPen( QPen( Qt::black, 2 ) ); | ||
349 | paint.drawLine( lastPoint, e->pos() ); | ||
350 | */ | ||
351 | } | ||
352 | lastPoint = e->pos(); | ||
353 | } | ||
354 | } | ||
355 | } | ||
356 | |||
357 | void QIMPenWidget::paintEvent( QPaintEvent * ) | ||
358 | { | ||
359 | QPainter paint( this ); | ||
360 | |||
361 | // draw guidelines | ||
362 | paint.setPen( Qt::gray ); | ||
363 | paint.drawLine( 0, 0, width(), 0 ); | ||
364 | int y = height() / 3; | ||
365 | paint.drawLine( 0, y, width(), y ); | ||
366 | y *= 2; | ||
367 | paint.setPen( blue ); | ||
368 | paint.drawLine( 0, y, width(), y ); | ||
369 | paint.setPen( Qt::gray ); | ||
370 | |||
371 | if ( !charSets.count() ) | ||
372 | return; | ||
373 | |||
374 | // draw the character set titles | ||
375 | QFont selFont( "helvetica", 8, QFont::Bold ); | ||
376 | QFont font( "helvetica", 8 ); | ||
377 | CharSetEntryIterator it( charSets ); | ||
378 | int spos = 0; | ||
379 | for ( ; it.current(); ++it ) { | ||
380 | int setWidth = width() * it.current()->stretch / totalStretch; | ||
381 | spos += setWidth; | ||
382 | if ( it.current() != charSets.getLast() ) { | ||
383 | paint.drawLine( spos, 0, spos, 5 ); | ||
384 | paint.drawLine( spos, height()-1, spos, height()-6 ); | ||
385 | } | ||
386 | paint.setFont( font ); | ||
387 | int w = paint.fontMetrics().width( it.current()->cs->title() ); | ||
388 | int tpos = spos - setWidth / 2; | ||
389 | paint.drawText( tpos - w/2, 0, w, 12, QPainter::AlignCenter, | ||
390 | it.current()->cs->title() ); | ||
391 | } | ||
392 | |||
393 | // draw any character that should be displayed when repainted. | ||
394 | QPoint off; | ||
395 | const QIMPenStrokeList *stk = 0; | ||
396 | if ( outputChar && mode == Waiting ) { | ||
397 | stk = &outputChar->penStrokes(); | ||
398 | QPoint p( outputChar->startingPoint() ); | ||
399 | QRect br( outputChar->boundingRect() ); | ||
400 | p.setX( (width() - br.width()) / 2 + (p.x () - br.left()) ); | ||
401 | off = p - outputChar->startingPoint(); | ||
402 | } else if ( mode == Waiting ) { | ||
403 | stk = &strokes; | ||
404 | strokeColor = gray; | ||
405 | } | ||
406 | |||
407 | if ( stk && !stk->isEmpty() ) { | ||
408 | paint.setPen( strokeColor ); | ||
409 | paint.setBrush( strokeColor ); | ||
410 | QIMPenStrokeIterator it( *stk ); | ||
411 | while ( it.current() ) { | ||
412 | QPoint p = it.current()->startingPoint() + off; | ||
413 | paint.drawRect( p.x()-1, p.y()-1, 2, 2 ); | ||
414 | const QArray<QIMPenGlyphLink> &chain = it.current()->chain(); | ||
415 | for ( unsigned i = 0; i < chain.count(); i++ ) { | ||
416 | p.rx() += chain[i].dx; | ||
417 | p.ry() += chain[i].dy; | ||
418 | paint.drawRect( p.x()-1, p.y()-1, 2, 2 ); | ||
419 | } | ||
420 | ++it; | ||
421 | if ( it.atLast() && mode == Waiting ) | ||
422 | strokeColor = black; | ||
423 | } | ||
424 | } | ||
425 | |||
426 | dirtyRect = QRect(); | ||
427 | |||
428 | // debug | ||
429 | /* | ||
430 | if ( input ) { | ||
431 | QArray<int> sig = input->sig(); | ||
432 | for ( unsigned i = 0; i < sig.count(); i++ ) { | ||
433 | paint.drawPoint( 200 + i, height()/2 - sig[i] / 8 ); | ||
434 | } | ||
435 | } | ||
436 | */ | ||
437 | } | ||
438 | |||
439 | void QIMPenWidget::resizeEvent( QResizeEvent *e ) | ||
440 | { | ||
441 | if ( mode == Output ) | ||
442 | showCharacter( outputChar, 0 ); | ||
443 | |||
444 | QWidget::resizeEvent( e ); | ||
445 | } | ||
446 | |||