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-rw-r--r--examples/progress/progress.cpp337
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diff --git a/examples/progress/progress.cpp b/examples/progress/progress.cpp
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+++ b/examples/progress/progress.cpp
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+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
+**
+** This file is part of an example program for Qt. This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#include <qprogressdialog.h>
+#include <qapplication.h>
+#include <qmenubar.h>
+#include <qpopupmenu.h>
+#include <qpainter.h>
+#include <stdlib.h>
+
+class AnimatedThingy : public QLabel {
+public:
+ AnimatedThingy( QWidget* parent, const QString& s ) :
+ QLabel(parent),
+ label(s),
+ step(0)
+ {
+ setBackgroundColor(white);
+ label+="\n... and wasting CPU\nwith this animation!\n";
+
+ for (int i=0; i<nqix; i++)
+ ox[0][i] = oy[0][i] = ox[1][i] = oy[1][i] = 0;
+ x0 = y0 = x1 = y1 = 0;
+ dx0 = rand()%8+2;
+ dy0 = rand()%8+2;
+ dx1 = rand()%8+2;
+ dy1 = rand()%8+2;
+ }
+
+ void show()
+ {
+ if (!isVisible()) startTimer(100);
+ QWidget::show();
+ }
+
+ void hide()
+ {
+ QWidget::hide();
+ killTimers();
+ }
+
+ QSize sizeHint() const
+ {
+ return QSize(120,100);
+ }
+
+protected:
+ void timerEvent(QTimerEvent*)
+ {
+ QPainter p(this);
+ QPen pn=p.pen();
+ pn.setWidth(2);
+ pn.setColor(backgroundColor());
+ p.setPen(pn);
+
+ step = (step + 1) % nqix;
+
+ p.drawLine(ox[0][step], oy[0][step], ox[1][step], oy[1][step]);
+
+ inc(x0, dx0, width());
+ inc(y0, dy0, height());
+ inc(x1, dx1, width());
+ inc(y1, dy1, height());
+ ox[0][step] = x0;
+ oy[0][step] = y0;
+ ox[1][step] = x1;
+ oy[1][step] = y1;
+
+ QColor c;
+ c.setHsv( (step*255)/nqix, 255, 255 ); // rainbow effect
+ pn.setColor(c);
+ p.setPen(pn);
+ p.drawLine(ox[0][step], oy[0][step], ox[1][step], oy[1][step]);
+ p.setPen(colorGroup().text());
+ p.drawText(rect(), AlignCenter, label);
+ }
+
+ void paintEvent(QPaintEvent* event)
+ {
+ QPainter p(this);
+ QPen pn=p.pen();
+ pn.setWidth(2);
+ p.setPen(pn);
+ p.setClipRect(event->rect());
+ for (int i=0; i<nqix; i++) {
+ QColor c;
+ c.setHsv( (i*255)/nqix, 255, 255 ); // rainbow effect
+ pn.setColor(c);
+ p.setPen(pn);
+ p.drawLine(ox[0][i], oy[0][i], ox[1][i], oy[1][i]);
+ }
+ p.setPen(colorGroup().text());
+ p.drawText(rect(), AlignCenter, label);
+ }
+
+private:
+ void inc(int& x, int& dx, int b)
+ {
+ x+=dx;
+ if (x<0) { x=0; dx=rand()%8+2; }
+ else if (x>=b) { x=b-1; dx=-(rand()%8+2); }
+ }
+
+ enum {nqix=10};
+ int ox[2][nqix];
+ int oy[2][nqix];
+ int x0,y0,x1,y1;
+ int dx0,dy0,dx1,dy1;
+ QString label;
+ int step;
+};
+
+
+class CPUWaster : public QWidget
+{
+ Q_OBJECT
+
+ enum { first_draw_item = 1000, last_draw_item = 1006 };
+
+ int drawItemRects(int id)
+ {
+ int n = id - first_draw_item;
+ int r = 100;
+ while (n--) r*=(n%3 ? 5 : 4);
+ return r;
+ }
+ QString drawItemText(int id)
+ {
+ QString str;
+ str.sprintf("%d Rectangles", drawItemRects(id));
+ return str;
+ }
+
+public:
+ CPUWaster() :
+ pb(0)
+ {
+ menubar = new QMenuBar( this, "menu" );
+ Q_CHECK_PTR( menubar );
+
+ QPopupMenu* file = new QPopupMenu();
+ Q_CHECK_PTR( file );
+ menubar->insertItem( "&File", file );
+ for (int i=first_draw_item; i<=last_draw_item; i++)
+ file->insertItem( drawItemText(i), i );
+ connect( menubar, SIGNAL(activated(int)), this, SLOT(doMenuItem(int)) );
+ file->insertSeparator();
+ file->insertItem( "Quit", qApp, SLOT(quit()) );
+
+ options = new QPopupMenu();
+ Q_CHECK_PTR( options );
+ menubar->insertItem( "&Options", options );
+ td_id = options->insertItem( "Timer driven", this, SLOT(timerDriven()) );
+ ld_id = options->insertItem( "Loop driven", this, SLOT(loopDriven()) );
+ options->insertSeparator();
+ dl_id = options->insertItem( "Default label", this, SLOT(defaultLabel()) );
+ cl_id = options->insertItem( "Custom label", this, SLOT(customLabel()) );
+ options->insertSeparator();
+ md_id = options->insertItem( "No minimum duration", this, SLOT(toggleMinimumDuration()) );
+ options->setCheckable( TRUE );
+ loopDriven();
+ defaultLabel();
+
+ setFixedSize( 400, 300 );
+
+ setBackgroundColor( black );
+ }
+
+public slots:
+ void doMenuItem(int id)
+ {
+ if (id >= first_draw_item && id <= last_draw_item)
+ draw(drawItemRects(id));
+ }
+
+ void stopDrawing() { got_stop = TRUE; }
+
+ void timerDriven()
+ {
+ timer_driven = TRUE;
+ options->setItemChecked( td_id, TRUE );
+ options->setItemChecked( ld_id, FALSE );
+ }
+
+ void loopDriven()
+ {
+ timer_driven = FALSE;
+ options->setItemChecked( ld_id, TRUE );
+ options->setItemChecked( td_id, FALSE );
+ }
+
+ void defaultLabel()
+ {
+ default_label = TRUE;
+ options->setItemChecked( dl_id, TRUE );
+ options->setItemChecked( cl_id, FALSE );
+ }
+
+ void customLabel()
+ {
+ default_label = FALSE;
+ options->setItemChecked( dl_id, FALSE );
+ options->setItemChecked( cl_id, TRUE );
+ }
+
+ void toggleMinimumDuration()
+ {
+ options->setItemChecked( md_id,
+ !options->isItemChecked( md_id ) );
+ }
+
+private:
+ void timerEvent( QTimerEvent* )
+ {
+ if (!got_stop)
+ pb->setProgress( pb->totalSteps() - rects );
+ rects--;
+
+ {
+ QPainter p(this);
+
+ int ww = width();
+ int wh = height();
+
+ if ( ww > 8 && wh > 8 ) {
+ QColor c(rand()%255, rand()%255, rand()%255);
+ int x = rand() % (ww-8);
+ int y = rand() % (wh-8);
+ int w = rand() % (ww-x);
+ int h = rand() % (wh-y);
+ p.fillRect( x, y, w, h, c );
+ }
+ }
+
+ if (!rects || got_stop) {
+ if (!got_stop)
+ pb->setProgress( pb->totalSteps() );
+ QPainter p(this);
+ p.fillRect(0, 0, width(), height(), backgroundColor());
+ enableDrawingItems(TRUE);
+ killTimers();
+ delete pb;
+ pb = 0;
+ }
+ }
+
+ QProgressDialog* newProgressDialog( const char* label, int steps, bool modal )
+ {
+ QProgressDialog *d = new QProgressDialog(label, "Cancel", steps, this,
+ "progress", modal);
+ if ( options->isItemChecked( md_id ) )
+ d->setMinimumDuration(0);
+ if ( !default_label )
+ d->setLabel( new AnimatedThingy(d,label) );
+ return d;
+ }
+
+ void enableDrawingItems(bool yes)
+ {
+ for (int i=first_draw_item; i<=last_draw_item; i++) {
+ menubar->setItemEnabled(i, yes);
+ }
+ }
+
+ void draw(int n)
+ {
+ if ( timer_driven ) {
+ if ( pb ) {
+ qWarning("This cannot happen!");
+ return;
+ }
+ rects = n;
+ pb = newProgressDialog("Drawing rectangles.\n"
+ "Using timer event.", n, FALSE);
+ pb->setCaption("Please Wait");
+ connect(pb, SIGNAL(cancelled()), this, SLOT(stopDrawing()));
+ enableDrawingItems(FALSE);
+ startTimer(0);
+ got_stop = FALSE;
+ } else {
+ QProgressDialog* lpb = newProgressDialog(
+ "Drawing rectangles.\nUsing loop.", n, TRUE);
+ lpb->setCaption("Please Wait");
+
+ QPainter p(this);
+ for (int i=0; i<n; i++) {
+ lpb->setProgress(i);
+ if ( lpb->wasCancelled() )
+ break;
+
+ QColor c(rand()%255, rand()%255, rand()%255);
+ int x = rand()%(width()-8);
+ int y = rand()%(height()-8);
+ int w = rand()%(width()-x);
+ int h = rand()%(height()-y);
+ p.fillRect(x,y,w,h,c);
+ }
+
+ p.fillRect(0, 0, width(), height(), backgroundColor());
+
+ delete lpb;
+ }
+ }
+
+ QMenuBar* menubar;
+ QProgressDialog* pb;
+ QPopupMenu* options;
+ int td_id, ld_id;
+ int dl_id, cl_id;
+ int md_id;
+ int rects;
+ bool timer_driven;
+ bool default_label;
+ bool got_stop;
+};
+
+int main( int argc, char **argv )
+{
+ QApplication a( argc, argv );
+
+ int wincount = argc > 1 ? atoi(argv[1]) : 1;
+
+ for ( int i=0; i<wincount; i++ ) {
+ CPUWaster* cpuw = new CPUWaster;
+ if ( i == 0 ) a.setMainWidget(cpuw);
+ cpuw->show();
+ }
+ return a.exec();
+}
+
+#include "progress.moc"
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