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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/examples/progress/progress.doc:4 -->
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Progress Bar and Dialog Example</title>
<style type="text/css"><!--
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<tr bgcolor="#E5E5E5">
<td valign=center>
<a href="index.html">
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>Progress Bar and Dialog Example</h1>
<p>
This example displays either a simple (text-only) or a
custom-labelled (user-supplied widget) progress dialog. It also
demonstrates simple use of menus.
<hr>
<p> Implementation:
<p> <pre>/****************************************************************************
** $Id: qt/progress.cpp 3.3.8 edited Jan 11 14:37 $
**
** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
**
** This file is part of an example program for TQt. This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
#include <<a href="qprogressdialog-h.html">ntqprogressdialog.h</a>>
#include <<a href="qapplication-h.html">ntqapplication.h</a>>
#include <<a href="tqmenubar-h.html">tqmenubar.h</a>>
#include <<a href="tqpopupmenu-h.html">tqpopupmenu.h</a>>
#include <<a href="qpainter-h.html">ntqpainter.h</a>>
#include <stdlib.h>
class AnimatedThingy : public <a href="ntqlabel.html">TQLabel</a> {
public:
AnimatedThingy( <a href="tqwidget.html">TQWidget</a>* parent, const <a href="tqstring.html">TQString</a>& s ) :
<a href="ntqlabel.html">TQLabel</a>(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);
TQWidget::<a href="tqwidget.html#show">show</a>();
}
void hide()
{
<a name="x89"></a> TQWidget::<a href="tqwidget.html#hide">hide</a>();
killTimers();
}
<a href="tqsize.html">TQSize</a> sizeHint() const
{
return TQSize(120,100);
}
protected:
void timerEvent(TQTimerEvent*)
{
<a href="ntqpainter.html">TQPainter</a> p(this);
<a name="x76"></a> <a href="ntqpen.html">TQPen</a> pn=p.<a href="ntqpainter.html#pen">pen</a>();
<a name="x80"></a> pn.<a href="ntqpen.html#setWidth">setWidth</a>(2);
<a name="x79"></a> pn.<a href="ntqpen.html#setColor">setColor</a>(backgroundColor());
<a name="x78"></a> p.<a href="ntqpainter.html#setPen">setPen</a>(pn);
step = (step + 1) % nqix;
<a name="x73"></a> p.<a href="ntqpainter.html#drawLine">drawLine</a>(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;
<a href="ntqcolor.html">TQColor</a> c;
<a name="x66"></a> c.<a href="ntqcolor.html#setHsv">setHsv</a>( (step*255)/nqix, 255, 255 ); // rainbow effect
pn.<a href="ntqpen.html#setColor">setColor</a>(c);
p.<a href="ntqpainter.html#setPen">setPen</a>(pn);
p.<a href="ntqpainter.html#drawLine">drawLine</a>(ox[0][step], oy[0][step], ox[1][step], oy[1][step]);
p.<a href="ntqpainter.html#setPen">setPen</a>(colorGroup().text());
<a name="x74"></a> p.<a href="ntqpainter.html#drawText">drawText</a>(rect(), AlignCenter, label);
}
void paintEvent(TQPaintEvent* event)
{
<a href="ntqpainter.html">TQPainter</a> p(this);
<a href="ntqpen.html">TQPen</a> pn=p.<a href="ntqpainter.html#pen">pen</a>();
pn.<a href="ntqpen.html#setWidth">setWidth</a>(2);
p.<a href="ntqpainter.html#setPen">setPen</a>(pn);
<a name="x77"></a> p.<a href="ntqpainter.html#setClipRect">setClipRect</a>(event->rect());
for (int i=0; i<nqix; i++) {
<a href="ntqcolor.html">TQColor</a> c;
c.<a href="ntqcolor.html#setHsv">setHsv</a>( (i*255)/nqix, 255, 255 ); // rainbow effect
pn.<a href="ntqpen.html#setColor">setColor</a>(c);
p.<a href="ntqpainter.html#setPen">setPen</a>(pn);
p.<a href="ntqpainter.html#drawLine">drawLine</a>(ox[0][i], oy[0][i], ox[1][i], oy[1][i]);
}
p.<a href="ntqpainter.html#setPen">setPen</a>(colorGroup().text());
p.<a href="ntqpainter.html#drawText">drawText</a>(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;
<a href="tqstring.html">TQString</a> label;
int step;
};
class CPUWaster : public <a href="tqwidget.html">TQWidget</a>
{
<a href="metaobjects.html#TQ_OBJECT">TQ_OBJECT</a>
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;
}
<a href="tqstring.html">TQString</a> drawItemText(int id)
{
<a href="tqstring.html">TQString</a> str;
str.<a href="tqstring.html#sprintf">sprintf</a>("%d Rectangles", drawItemRects(id));
return str;
}
public:
CPUWaster() :
pb(0)
{
menubar = new <a href="tqmenubar.html">TQMenuBar</a>( this, "menu" );
<a href="ntqapplication.html#TQ_CHECK_PTR">TQ_CHECK_PTR</a>( menubar );
<a href="tqpopupmenu.html">TQPopupMenu</a>* file = new <a href="tqpopupmenu.html">TQPopupMenu</a>();
<a href="ntqapplication.html#TQ_CHECK_PTR">TQ_CHECK_PTR</a>( file );
menubar-><a href="tqmenudata.html#insertItem">insertItem</a>( "&File", file );
for (int i=first_draw_item; i<=last_draw_item; i++)
file-><a href="tqmenudata.html#insertItem">insertItem</a>( drawItemText(i), i );
<a name="x67"></a> connect( menubar, TQ_SIGNAL(<a href="tqmenubar.html#activated">activated</a>(int)), this, TQ_SLOT(doMenuItem(int)) );
<a name="x69"></a> file-><a href="tqmenudata.html#insertSeparator">insertSeparator</a>();
file-><a href="tqmenudata.html#insertItem">insertItem</a>( "Quit", tqApp, TQ_SLOT(<a href="ntqapplication.html#quit">quit</a>()) );
options = new <a href="tqpopupmenu.html">TQPopupMenu</a>();
<a href="ntqapplication.html#TQ_CHECK_PTR">TQ_CHECK_PTR</a>( options );
menubar-><a href="tqmenudata.html#insertItem">insertItem</a>( "&Options", options );
td_id = options-><a href="tqmenudata.html#insertItem">insertItem</a>( "Timer driven", this, TQ_SLOT(timerDriven()) );
ld_id = options-><a href="tqmenudata.html#insertItem">insertItem</a>( "Loop driven", this, TQ_SLOT(loopDriven()) );
options-><a href="tqmenudata.html#insertSeparator">insertSeparator</a>();
dl_id = options-><a href="tqmenudata.html#insertItem">insertItem</a>( "Default label", this, TQ_SLOT(defaultLabel()) );
cl_id = options-><a href="tqmenudata.html#insertItem">insertItem</a>( "Custom label", this, TQ_SLOT(customLabel()) );
options-><a href="tqmenudata.html#insertSeparator">insertSeparator</a>();
md_id = options-><a href="tqmenudata.html#insertItem">insertItem</a>( "No minimum duration", this, TQ_SLOT(toggleMinimumDuration()) );
<a name="x81"></a> options-><a href="tqpopupmenu.html#setCheckable">setCheckable</a>( 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;
<a name="x71"></a> options-><a href="tqmenudata.html#setItemChecked">setItemChecked</a>( td_id, TRUE );
options-><a href="tqmenudata.html#setItemChecked">setItemChecked</a>( ld_id, FALSE );
}
void loopDriven()
{
timer_driven = FALSE;
options-><a href="tqmenudata.html#setItemChecked">setItemChecked</a>( ld_id, TRUE );
options-><a href="tqmenudata.html#setItemChecked">setItemChecked</a>( td_id, FALSE );
}
void defaultLabel()
{
default_label = TRUE;
options-><a href="tqmenudata.html#setItemChecked">setItemChecked</a>( dl_id, TRUE );
options-><a href="tqmenudata.html#setItemChecked">setItemChecked</a>( cl_id, FALSE );
}
void customLabel()
{
default_label = FALSE;
options-><a href="tqmenudata.html#setItemChecked">setItemChecked</a>( dl_id, FALSE );
options-><a href="tqmenudata.html#setItemChecked">setItemChecked</a>( cl_id, TRUE );
}
void toggleMinimumDuration()
{
options-><a href="tqmenudata.html#setItemChecked">setItemChecked</a>( md_id,
<a name="x70"></a> !options-><a href="tqmenudata.html#isItemChecked">isItemChecked</a>( md_id ) );
}
private:
void timerEvent( <a href="tqtimerevent.html">TQTimerEvent</a>* )
{
if (!got_stop)
<a name="x86"></a><a name="x85"></a> pb-><a href="ntqprogressdialog.html#setProgress">setProgress</a>( pb-><a href="ntqprogressdialog.html#totalSteps">totalSteps</a>() - rects );
rects--;
{
<a href="ntqpainter.html">TQPainter</a> p(this);
int ww = width();
int wh = height();
if ( ww > 8 && wh > 8 ) {
<a href="ntqcolor.html">TQColor</a> 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);
<a name="x75"></a> p.<a href="ntqpainter.html#fillRect">fillRect</a>( x, y, w, h, c );
}
}
if (!rects || got_stop) {
if (!got_stop)
pb-><a href="ntqprogressdialog.html#setProgress">setProgress</a>( pb-><a href="ntqprogressdialog.html#totalSteps">totalSteps</a>() );
<a href="ntqpainter.html">TQPainter</a> p(this);
p.<a href="ntqpainter.html#fillRect">fillRect</a>(0, 0, width(), height(), backgroundColor());
enableDrawingItems(TRUE);
killTimers();
delete pb;
pb = 0;
}
}
<a href="ntqprogressdialog.html">TQProgressDialog</a>* newProgressDialog( const char* label, int steps, bool modal )
{
<a href="ntqprogressdialog.html">TQProgressDialog</a> *d = new <a href="ntqprogressdialog.html">TQProgressDialog</a>(label, "Cancel", steps, this,
"progress", modal);
if ( options-><a href="tqmenudata.html#isItemChecked">isItemChecked</a>( md_id ) )
<a name="x84"></a> d-><a href="ntqprogressdialog.html#setMinimumDuration">setMinimumDuration</a>(0);
if ( !default_label )
<a name="x83"></a> d-><a href="ntqprogressdialog.html#setLabel">setLabel</a>( new AnimatedThingy(d,label) );
return d;
}
void enableDrawingItems(bool yes)
{
for (int i=first_draw_item; i<=last_draw_item; i++) {
<a name="x72"></a> menubar-><a href="tqmenudata.html#setItemEnabled">setItemEnabled</a>(i, yes);
}
}
void draw(int n)
{
if ( timer_driven ) {
if ( pb ) {
<a href="ntqapplication.html#qWarning">tqWarning</a>("This cannot happen!");
return;
}
rects = n;
pb = newProgressDialog("Drawing rectangles.\n"
"Using timer event.", n, FALSE);
pb-><a href="tqwidget.html#setCaption">setCaption</a>("Please Wait");
<a name="x82"></a> connect(pb, TQ_SIGNAL(<a href="ntqprogressdialog.html#cancelled">cancelled</a>()), this, TQ_SLOT(stopDrawing()));
enableDrawingItems(FALSE);
startTimer(0);
got_stop = FALSE;
} else {
<a href="ntqprogressdialog.html">TQProgressDialog</a>* lpb = newProgressDialog(
"Drawing rectangles.\nUsing loop.", n, TRUE);
lpb-><a href="tqwidget.html#setCaption">setCaption</a>("Please Wait");
<a href="ntqpainter.html">TQPainter</a> p(this);
for (int i=0; i<n; i++) {
lpb-><a href="ntqprogressdialog.html#setProgress">setProgress</a>(i);
<a name="x87"></a> if ( lpb-><a href="ntqprogressdialog.html#wasCancelled">wasCancelled</a>() )
break;
<a href="ntqcolor.html">TQColor</a> 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.<a href="ntqpainter.html#fillRect">fillRect</a>(x,y,w,h,c);
}
p.<a href="ntqpainter.html#fillRect">fillRect</a>(0, 0, width(), height(), backgroundColor());
delete lpb;
}
}
<a href="tqmenubar.html">TQMenuBar</a>* menubar;
<a href="ntqprogressdialog.html">TQProgressDialog</a>* pb;
<a href="tqpopupmenu.html">TQPopupMenu</a>* 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 )
{
<a href="ntqapplication.html">TQApplication</a> 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.<a href="ntqapplication.html#setMainWidget">setMainWidget</a>(cpuw);
cpuw-><a href="tqwidget.html#show">show</a>();
}
return a.<a href="ntqapplication.html#exec">exec</a>();
}
#include "progress.moc"
</pre>
<p>See also <a href="examples.html">Examples</a>.
<!-- eof -->
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<table width=100% cellspacing=0 border=0><tr>
<td>Copyright © 2007
<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
<td align=right><div align=right>TQt 3.3.8</div>
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