<!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/progressbar/progressbar.doc:5 --> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>Progress Bar</title> <style type="text/css"><!-- fn { margin-left: 1cm; text-indent: -1cm; } a:link { color: #004faf; text-decoration: none } a:visited { color: #672967; text-decoration: none } body { background: #ffffff; color: black; } --></style> </head> <body> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr bgcolor="#E5E5E5"> <td valign=center> <a href="index.html"> <font color="#004faf">Home</font></a> | <a href="classes.html"> <font color="#004faf">All Classes</font></a> | <a href="mainclasses.html"> <font color="#004faf">Main Classes</font></a> | <a href="annotated.html"> <font color="#004faf">Annotated</font></a> | <a href="groups.html"> <font color="#004faf">Grouped Classes</font></a> | <a href="functions.html"> <font color="#004faf">Functions</font></a> </td> <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</h1> <p> This example shows how to use a progress bar. <p> <hr> <p> Header file: <p> <pre>/**************************************************************************** ** $Id: qt/progressbar.h 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. ** *****************************************************************************/ #ifndef PROGRESSBAR_H #define PROGRESSBAR_H #include <<a href="qbuttongroup-h.html">ntqbuttongroup.h</a>> #include <<a href="qtimer-h.html">ntqtimer.h</a>> class TQRadioButton; class TQPushButton; class TQProgressBar; class ProgressBar : public <a href="ntqbuttongroup.html">TQButtonGroup</a> { <a href="metaobjects.html#TQ_OBJECT">TQ_OBJECT</a> public: ProgressBar( <a href="ntqwidget.html">TQWidget</a> *parent = 0, const char *name = 0 ); protected: <a href="ntqradiobutton.html">TQRadioButton</a> *slow, *normal, *fast; <a href="ntqpushbutton.html">TQPushButton</a> *start, *pause, *reset; <a href="ntqprogressbar.html">TQProgressBar</a> *progress; <a href="ntqtimer.html">TQTimer</a> timer; protected slots: void slotStart(); void slotReset(); void slotTimeout(); }; #endif </pre> <p> <hr> <p> Implementation: <p> <pre>/**************************************************************************** ** $Id: qt/progressbar.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 "progressbar.h" #include <<a href="qradiobutton-h.html">ntqradiobutton.h</a>> #include <<a href="qpushbutton-h.html">ntqpushbutton.h</a>> #include <<a href="qprogressbar-h.html">ntqprogressbar.h</a>> #include <<a href="qlayout-h.html">ntqlayout.h</a>> #include <<a href="qmotifstyle-h.html">ntqmotifstyle.h</a>> /* * Constructor * * Creates child widgets of the ProgressBar widget */ <a name="f346"></a>ProgressBar::ProgressBar( <a href="ntqwidget.html">TQWidget</a> *parent, const char *name ) : <a href="ntqbuttongroup.html">TQButtonGroup</a>( 0, Horizontal, "Progress Bar", parent, name ), timer() { <a href="ntqframe.html#setMargin">setMargin</a>( 10 ); <a href="qgridlayout.html">TQGridLayout</a>* toplayout = new <a href="qgridlayout.html">TQGridLayout</a>( <a href="ntqwidget.html#layout">layout</a>(), 2, 2, 5); <a href="ntqbuttongroup.html#setRadioButtonExclusive">setRadioButtonExclusive</a>( TRUE ); // insert three radiobuttons which the user can use // to set the speed of the progress and two pushbuttons // to start/pause/continue and reset the progress slow = new <a href="ntqradiobutton.html">TQRadioButton</a>( "S&low", this ); normal = new <a href="ntqradiobutton.html">TQRadioButton</a>( "&Normal", this ); fast = new <a href="ntqradiobutton.html">TQRadioButton</a>( "&Fast", this ); <a href="qvboxlayout.html">TQVBoxLayout</a>* vb1 = new <a href="qvboxlayout.html">TQVBoxLayout</a>; <a name="x964"></a> toplayout-><a href="qgridlayout.html#addLayout">addLayout</a>( vb1, 0, 0 ); vb1-><a href="qboxlayout.html#addWidget">addWidget</a>( slow ); vb1-><a href="qboxlayout.html#addWidget">addWidget</a>( normal ); vb1-><a href="qboxlayout.html#addWidget">addWidget</a>( fast ); // two push buttons, one for start, for for reset. start = new <a href="ntqpushbutton.html">TQPushButton</a>( "&Start", this ); reset = new <a href="ntqpushbutton.html">TQPushButton</a>( "&Reset", this ); <a href="qvboxlayout.html">TQVBoxLayout</a>* vb2 = new <a href="qvboxlayout.html">TQVBoxLayout</a>; toplayout-><a href="qgridlayout.html#addLayout">addLayout</a>( vb2, 0, 1 ); vb2-><a href="qboxlayout.html#addWidget">addWidget</a>( start ); vb2-><a href="qboxlayout.html#addWidget">addWidget</a>( reset ); // Create the progressbar progress = new <a href="ntqprogressbar.html">TQProgressBar</a>( 100, this ); <a name="x975"></a> // progress-><a href="ntqwidget.html#setStyle">setStyle</a>( new <a href="ntqmotifstyle.html">TQMotifStyle</a>() ); <a name="x965"></a> toplayout-><a href="qgridlayout.html#addMultiCellWidget">addMultiCellWidget</a>( progress, 1, 1, 0, 1 ); // connect the clicked() SIGNALs of the pushbuttons to SLOTs <a name="x962"></a> <a href="ntqobject.html#connect">connect</a>( start, SIGNAL( <a href="ntqbutton.html#clicked">clicked</a>() ), this, SLOT( slotStart() ) ); <a href="ntqobject.html#connect">connect</a>( reset, SIGNAL( <a href="ntqbutton.html#clicked">clicked</a>() ), this, SLOT( slotReset() ) ); // connect the timeout() SIGNAL of the progress-timer to a SLOT <a href="ntqobject.html#connect">connect</a>( &timer, SIGNAL( timeout() ), this, SLOT( slotTimeout() ) ); // Let's start with normal speed... <a name="x972"></a> normal-><a href="ntqradiobutton.html#setChecked">setChecked</a>( TRUE ); // some contraints <a name="x974"></a> start-><a href="ntqwidget.html#setFixedWidth">setFixedWidth</a>( 80 ); <a href="ntqwidget.html#setMinimumWidth">setMinimumWidth</a>( 300 ); } /* * SLOT slotStart * * This SLOT is called if the user clicks start/pause/continue * button */ void <a name="f347"></a>ProgressBar::slotStart() { // If the progress bar is at the beginning... <a name="x966"></a> if ( progress-><a href="ntqprogressbar.html#progress">progress</a>() == -1 ) { // ...set according to the checked speed-radiobutton // the number of steps which are needed to complete the process <a name="x971"></a> if ( slow-><a href="ntqradiobutton.html#isChecked">isChecked</a>() ) <a name="x969"></a> progress-><a href="ntqprogressbar.html#setTotalSteps">setTotalSteps</a>( 10000 ); else if ( normal-><a href="ntqradiobutton.html#isChecked">isChecked</a>() ) progress-><a href="ntqprogressbar.html#setTotalSteps">setTotalSteps</a>( 1000 ); else progress-><a href="ntqprogressbar.html#setTotalSteps">setTotalSteps</a>( 50 ); // disable the speed-radiobuttons <a name="x973"></a> slow-><a href="ntqwidget.html#setEnabled">setEnabled</a>( FALSE ); normal-><a href="ntqwidget.html#setEnabled">setEnabled</a>( FALSE ); fast-><a href="ntqwidget.html#setEnabled">setEnabled</a>( FALSE ); } // If the progress is not running... if ( !timer.isActive() ) { // ...start the timer (and so the progress) with a interval of 1 ms... timer.start( 1 ); // ...and rename the start/pause/continue button to Pause <a name="x963"></a> start-><a href="ntqbutton.html#setText">setText</a>( "&Pause" ); } else { // if the prgress is running... // ...stop the timer (and so the prgress)... timer.stop(); // ...and rename the start/pause/continue button to Continue start-><a href="ntqbutton.html#setText">setText</a>( "&Continue" ); } } /* * SLOT slotReset * * This SLOT is called when the user clicks the reset button */ void <a name="f348"></a>ProgressBar::slotReset() { // stop the timer and progress timer.stop(); // rename the start/pause/continue button to Start... start-><a href="ntqbutton.html#setText">setText</a>( "&Start" ); // ...and enable this button start-><a href="ntqwidget.html#setEnabled">setEnabled</a>( TRUE ); // enable the speed-radiobuttons slow-><a href="ntqwidget.html#setEnabled">setEnabled</a>( TRUE ); normal-><a href="ntqwidget.html#setEnabled">setEnabled</a>( TRUE ); fast-><a href="ntqwidget.html#setEnabled">setEnabled</a>( TRUE ); // reset the progressbar <a name="x967"></a> progress-><a href="ntqprogressbar.html#reset">reset</a>(); } /* * SLOT slotTimeout * * This SLOT is called each ms when the timer is * active (== progress is running) */ void <a name="f349"></a>ProgressBar::slotTimeout() { int p = progress-><a href="ntqprogressbar.html#progress">progress</a>(); #if 1 // If the progress is complete... <a name="x970"></a> if ( p == progress-><a href="ntqprogressbar.html#totalSteps">totalSteps</a>() ) { // ...rename the start/pause/continue button to Start... start-><a href="ntqbutton.html#setText">setText</a>( "&Start" ); // ...and disable it... start-><a href="ntqwidget.html#setEnabled">setEnabled</a>( FALSE ); // ...and return return; } #endif // If the process is not complete increase it <a name="x968"></a> progress-><a href="ntqprogressbar.html#setProgress">setProgress</a>( ++p ); } </pre> <p> <hr> <p> Main: <p> <pre>/**************************************************************************** ** $Id: qt/main.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 "progressbar.h" #include <<a href="qapplication-h.html">ntqapplication.h</a>> int main(int argc,char **argv) { <a href="ntqapplication.html">TQApplication</a> a(argc,argv); ProgressBar progressbar; progressbar.<a href="ntqwidget.html#setCaption">setCaption</a>("TQt Example - ProgressBar"); a.<a href="ntqapplication.html#setMainWidget">setMainWidget</a>(&progressbar); progressbar.<a href="ntqwidget.html#show">show</a>(); return a.<a href="ntqapplication.html#exec">exec</a>(); } </pre> <p>See also <a href="examples.html">Examples</a>. <!-- eof --> <p><address><hr><div align=center> <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> </table></div></address></body> </html>