source: trunk/examples/progress/progress.cpp@ 25

Last change on this file since 25 was 2, checked in by dmik, 20 years ago

Imported xplatform parts of the official release 3.3.1 from Trolltech
  • Property svn:keywords set to Id
File size: 7.7 KB
Line 
1/****************************************************************************
2** $Id: progress.cpp 2 2005-11-16 15:49:26Z dmik $
3**
4** Copyright (C) 1992-2000 Trolltech AS. All rights reserved.
5**
6** This file is part of an example program for Qt. This example
7** program may be used, distributed and modified without limitation.
8**
9*****************************************************************************/
10
11#include <qprogressdialog.h>
12#include <qapplication.h>
13#include <qmenubar.h>
14#include <qpopupmenu.h>
15#include <qpainter.h>
16#include <stdlib.h>
17
18class AnimatedThingy : public QLabel {
19public:
20 AnimatedThingy( QWidget* parent, const QString& s ) :
21 QLabel(parent),
22 label(s),
23 step(0)
24 {
25 setBackgroundColor(white);
26 label+="\n... and wasting CPU\nwith this animation!\n";
27
28 for (int i=0; i<nqix; i++)
29 ox[0][i] = oy[0][i] = ox[1][i] = oy[1][i] = 0;
30 x0 = y0 = x1 = y1 = 0;
31 dx0 = rand()%8+2;
32 dy0 = rand()%8+2;
33 dx1 = rand()%8+2;
34 dy1 = rand()%8+2;
35 }
36
37 void show()
38 {
39 if (!isVisible()) startTimer(100);
40 QWidget::show();
41 }
42
43 void hide()
44 {
45 QWidget::hide();
46 killTimers();
47 }
48
49 QSize sizeHint() const
50 {
51 return QSize(120,100);
52 }
53
54protected:
55 void timerEvent(QTimerEvent*)
56 {
57 QPainter p(this);
58 QPen pn=p.pen();
59 pn.setWidth(2);
60 pn.setColor(backgroundColor());
61 p.setPen(pn);
62
63 step = (step + 1) % nqix;
64
65 p.drawLine(ox[0][step], oy[0][step], ox[1][step], oy[1][step]);
66
67 inc(x0, dx0, width());
68 inc(y0, dy0, height());
69 inc(x1, dx1, width());
70 inc(y1, dy1, height());
71 ox[0][step] = x0;
72 oy[0][step] = y0;
73 ox[1][step] = x1;
74 oy[1][step] = y1;
75
76 QColor c;
77 c.setHsv( (step*255)/nqix, 255, 255 ); // rainbow effect
78 pn.setColor(c);
79 p.setPen(pn);
80 p.drawLine(ox[0][step], oy[0][step], ox[1][step], oy[1][step]);
81 p.setPen(colorGroup().text());
82 p.drawText(rect(), AlignCenter, label);
83 }
84
85 void paintEvent(QPaintEvent* event)
86 {
87 QPainter p(this);
88 QPen pn=p.pen();
89 pn.setWidth(2);
90 p.setPen(pn);
91 p.setClipRect(event->rect());
92 for (int i=0; i<nqix; i++) {
93 QColor c;
94 c.setHsv( (i*255)/nqix, 255, 255 ); // rainbow effect
95 pn.setColor(c);
96 p.setPen(pn);
97 p.drawLine(ox[0][i], oy[0][i], ox[1][i], oy[1][i]);
98 }
99 p.setPen(colorGroup().text());
100 p.drawText(rect(), AlignCenter, label);
101 }
102
103private:
104 void inc(int& x, int& dx, int b)
105 {
106 x+=dx;
107 if (x<0) { x=0; dx=rand()%8+2; }
108 else if (x>=b) { x=b-1; dx=-(rand()%8+2); }
109 }
110
111 enum {nqix=10};
112 int ox[2][nqix];
113 int oy[2][nqix];
114 int x0,y0,x1,y1;
115 int dx0,dy0,dx1,dy1;
116 QString label;
117 int step;
118};
119
120
121class CPUWaster : public QWidget
122{
123 Q_OBJECT
124
125 enum { first_draw_item = 1000, last_draw_item = 1006 };
126
127 int drawItemRects(int id)
128 {
129 int n = id - first_draw_item;
130 int r = 100;
131 while (n--) r*=(n%3 ? 5 : 4);
132 return r;
133 }
134 QString drawItemText(int id)
135 {
136 QString str;
137 str.sprintf("%d Rectangles", drawItemRects(id));
138 return str;
139 }
140
141public:
142 CPUWaster() :
143 pb(0)
144 {
145 menubar = new QMenuBar( this, "menu" );
146 Q_CHECK_PTR( menubar );
147
148 QPopupMenu* file = new QPopupMenu();
149 Q_CHECK_PTR( file );
150 menubar->insertItem( "&File", file );
151 for (int i=first_draw_item; i<=last_draw_item; i++)
152 file->insertItem( drawItemText(i), i );
153 connect( menubar, SIGNAL(activated(int)), this, SLOT(doMenuItem(int)) );
154 file->insertSeparator();
155 file->insertItem( "Quit", qApp, SLOT(quit()) );
156
157 options = new QPopupMenu();
158 Q_CHECK_PTR( options );
159 menubar->insertItem( "&Options", options );
160 td_id = options->insertItem( "Timer driven", this, SLOT(timerDriven()) );
161 ld_id = options->insertItem( "Loop driven", this, SLOT(loopDriven()) );
162 options->insertSeparator();
163 dl_id = options->insertItem( "Default label", this, SLOT(defaultLabel()) );
164 cl_id = options->insertItem( "Custom label", this, SLOT(customLabel()) );
165 options->insertSeparator();
166 md_id = options->insertItem( "No minimum duration", this, SLOT(toggleMinimumDuration()) );
167 options->setCheckable( TRUE );
168 loopDriven();
169 defaultLabel();
170
171 setFixedSize( 400, 300 );
172
173 setBackgroundColor( black );
174 }
175
176public slots:
177 void doMenuItem(int id)
178 {
179 if (id >= first_draw_item && id <= last_draw_item)
180 draw(drawItemRects(id));
181 }
182
183 void stopDrawing() { got_stop = TRUE; }
184
185 void timerDriven()
186 {
187 timer_driven = TRUE;
188 options->setItemChecked( td_id, TRUE );
189 options->setItemChecked( ld_id, FALSE );
190 }
191
192 void loopDriven()
193 {
194 timer_driven = FALSE;
195 options->setItemChecked( ld_id, TRUE );
196 options->setItemChecked( td_id, FALSE );
197 }
198
199 void defaultLabel()
200 {
201 default_label = TRUE;
202 options->setItemChecked( dl_id, TRUE );
203 options->setItemChecked( cl_id, FALSE );
204 }
205
206 void customLabel()
207 {
208 default_label = FALSE;
209 options->setItemChecked( dl_id, FALSE );
210 options->setItemChecked( cl_id, TRUE );
211 }
212
213 void toggleMinimumDuration()
214 {
215 options->setItemChecked( md_id,
216 !options->isItemChecked( md_id ) );
217 }
218
219private:
220 void timerEvent( QTimerEvent* )
221 {
222 if (!got_stop)
223 pb->setProgress( pb->totalSteps() - rects );
224 rects--;
225
226 {
227 QPainter p(this);
228
229 int ww = width();
230 int wh = height();
231
232 if ( ww > 8 && wh > 8 ) {
233 QColor c(rand()%255, rand()%255, rand()%255);
234 int x = rand() % (ww-8);
235 int y = rand() % (wh-8);
236 int w = rand() % (ww-x);
237 int h = rand() % (wh-y);
238 p.fillRect( x, y, w, h, c );
239 }
240 }
241
242 if (!rects || got_stop) {
243 if (!got_stop)
244 pb->setProgress( pb->totalSteps() );
245 QPainter p(this);
246 p.fillRect(0, 0, width(), height(), backgroundColor());
247 enableDrawingItems(TRUE);
248 killTimers();
249 delete pb;
250 pb = 0;
251 }
252 }
253
254 QProgressDialog* newProgressDialog( const char* label, int steps, bool modal )
255 {
256 QProgressDialog *d = new QProgressDialog(label, "Cancel", steps, this,
257 "progress", modal);
258 if ( options->isItemChecked( md_id ) )
259 d->setMinimumDuration(0);
260 if ( !default_label )
261 d->setLabel( new AnimatedThingy(d,label) );
262 return d;
263 }
264
265 void enableDrawingItems(bool yes)
266 {
267 for (int i=first_draw_item; i<=last_draw_item; i++) {
268 menubar->setItemEnabled(i, yes);
269 }
270 }
271
272 void draw(int n)
273 {
274 if ( timer_driven ) {
275 if ( pb ) {
276 qWarning("This cannot happen!");
277 return;
278 }
279 rects = n;
280 pb = newProgressDialog("Drawing rectangles.\n"
281 "Using timer event.", n, FALSE);
282 pb->setCaption("Please Wait");
283 connect(pb, SIGNAL(cancelled()), this, SLOT(stopDrawing()));
284 enableDrawingItems(FALSE);
285 startTimer(0);
286 got_stop = FALSE;
287 } else {
288 QProgressDialog* lpb = newProgressDialog(
289 "Drawing rectangles.\nUsing loop.", n, TRUE);
290 lpb->setCaption("Please Wait");
291
292 QPainter p(this);
293 for (int i=0; i<n; i++) {
294 lpb->setProgress(i);
295 if ( lpb->wasCancelled() )
296 break;
297
298 QColor c(rand()%255, rand()%255, rand()%255);
299 int x = rand()%(width()-8);
300 int y = rand()%(height()-8);
301 int w = rand()%(width()-x);
302 int h = rand()%(height()-y);
303 p.fillRect(x,y,w,h,c);
304 }
305
306 p.fillRect(0, 0, width(), height(), backgroundColor());
307
308 delete lpb;
309 }
310 }
311
312 QMenuBar* menubar;
313 QProgressDialog* pb;
314 QPopupMenu* options;
315 int td_id, ld_id;
316 int dl_id, cl_id;
317 int md_id;
318 int rects;
319 bool timer_driven;
320 bool default_label;
321 bool got_stop;
322};
323
324int main( int argc, char **argv )
325{
326 QApplication a( argc, argv );
327
328 int wincount = argc > 1 ? atoi(argv[1]) : 1;
329
330 for ( int i=0; i<wincount; i++ ) {
331 CPUWaster* cpuw = new CPUWaster;
332 if ( i == 0 ) a.setMainWidget(cpuw);
333 cpuw->show();
334 }
335 return a.exec();
336}
337
338#include "progress.moc"
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