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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/examples/progressbar/progressbar.doc:5 -->
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>Progress Bar</title>
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<style type="text/css"><!--
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fn { margin-left: 1cm; text-indent: -1cm; }
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body { background: #ffffff; color: black; }
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--></style>
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</head>
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<body>
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<table border="0" cellpadding="0" cellspacing="0" width="100%">
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<tr bgcolor="#E5E5E5">
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<td valign=center>
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<a href="index.html">
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<font color="#004faf">Home</font></a>
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<font color="#004faf">Functions</font></a>
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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</h1>
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<p>
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This example shows how to use a progress bar.
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<p> <hr>
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<p> Header file:
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<p> <pre>/****************************************************************************
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** $Id: qt/progressbar.h 3.3.8 edited Jan 11 14:37 $
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**
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** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for TQt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#ifndef PROGRESSBAR_H
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#define PROGRESSBAR_H
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#include <<a href="tqbuttongroup-h.html">tqbuttongroup.h</a>>
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#include <<a href="tqtimer-h.html">tqtimer.h</a>>
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class TQRadioButton;
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class TQPushButton;
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class TQProgressBar;
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class ProgressBar : public <a href="tqbuttongroup.html">TQButtonGroup</a>
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{
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<a href="metaobjects.html#TQ_OBJECT">TQ_OBJECT</a>
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public:
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ProgressBar( <a href="tqwidget.html">TQWidget</a> *parent = 0, const char *name = 0 );
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protected:
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<a href="tqradiobutton.html">TQRadioButton</a> *slow, *normal, *fast;
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<a href="tqpushbutton.html">TQPushButton</a> *start, *pause, *reset;
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<a href="tqprogressbar.html">TQProgressBar</a> *progress;
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<a href="tqtimer.html">TQTimer</a> timer;
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protected slots:
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void slotStart();
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void slotReset();
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void slotTimeout();
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};
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#endif
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</pre>
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<p> <hr>
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<p> Implementation:
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<p> <pre>/****************************************************************************
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** $Id: qt/progressbar.cpp 3.3.8 edited Jan 11 14:37 $
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**
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** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for TQt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#include "progressbar.h"
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#include <<a href="tqradiobutton-h.html">tqradiobutton.h</a>>
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#include <<a href="tqpushbutton-h.html">tqpushbutton.h</a>>
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#include <<a href="tqprogressbar-h.html">tqprogressbar.h</a>>
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#include <<a href="tqlayout-h.html">tqlayout.h</a>>
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#include <<a href="qmotifstyle-h.html">ntqmotifstyle.h</a>>
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/*
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* Constructor
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*
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* Creates child widgets of the ProgressBar widget
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*/
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<a name="f346"></a>ProgressBar::ProgressBar( <a href="tqwidget.html">TQWidget</a> *parent, const char *name )
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: <a href="tqbuttongroup.html">TQButtonGroup</a>( 0, Horizontal, "Progress Bar", parent, name ), timer()
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{
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<a href="tqframe.html#setMargin">setMargin</a>( 10 );
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<a href="tqgridlayout.html">TQGridLayout</a>* toplayout = new <a href="tqgridlayout.html">TQGridLayout</a>( <a href="tqwidget.html#layout">layout</a>(), 2, 2, 5);
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<a href="tqbuttongroup.html#setRadioButtonExclusive">setRadioButtonExclusive</a>( TRUE );
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// insert three radiobuttons which the user can use
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// to set the speed of the progress and two pushbuttons
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// to start/pause/continue and reset the progress
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slow = new <a href="tqradiobutton.html">TQRadioButton</a>( "S&low", this );
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normal = new <a href="tqradiobutton.html">TQRadioButton</a>( "&Normal", this );
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fast = new <a href="tqradiobutton.html">TQRadioButton</a>( "&Fast", this );
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<a href="tqvboxlayout.html">TQVBoxLayout</a>* vb1 = new <a href="tqvboxlayout.html">TQVBoxLayout</a>;
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<a name="x964"></a> toplayout-><a href="tqgridlayout.html#addLayout">addLayout</a>( vb1, 0, 0 );
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vb1-><a href="tqboxlayout.html#addWidget">addWidget</a>( slow );
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vb1-><a href="tqboxlayout.html#addWidget">addWidget</a>( normal );
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vb1-><a href="tqboxlayout.html#addWidget">addWidget</a>( fast );
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// two push buttons, one for start, for for reset.
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start = new <a href="tqpushbutton.html">TQPushButton</a>( "&Start", this );
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reset = new <a href="tqpushbutton.html">TQPushButton</a>( "&Reset", this );
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<a href="tqvboxlayout.html">TQVBoxLayout</a>* vb2 = new <a href="tqvboxlayout.html">TQVBoxLayout</a>;
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toplayout-><a href="tqgridlayout.html#addLayout">addLayout</a>( vb2, 0, 1 );
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vb2-><a href="tqboxlayout.html#addWidget">addWidget</a>( start );
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vb2-><a href="tqboxlayout.html#addWidget">addWidget</a>( reset );
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// Create the progressbar
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progress = new <a href="tqprogressbar.html">TQProgressBar</a>( 100, this );
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<a name="x975"></a> // progress-><a href="tqwidget.html#setStyle">setStyle</a>( new <a href="ntqmotifstyle.html">TQMotifStyle</a>() );
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<a name="x965"></a> toplayout-><a href="tqgridlayout.html#addMultiCellWidget">addMultiCellWidget</a>( progress, 1, 1, 0, 1 );
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// connect the clicked() SIGNALs of the pushbuttons to SLOTs
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<a name="x962"></a> <a href="tqobject.html#connect">connect</a>( start, TQ_SIGNAL( <a href="tqbutton.html#clicked">clicked</a>() ), this, TQ_SLOT( slotStart() ) );
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<a href="tqobject.html#connect">connect</a>( reset, TQ_SIGNAL( <a href="tqbutton.html#clicked">clicked</a>() ), this, TQ_SLOT( slotReset() ) );
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// connect the timeout() TQ_SIGNAL of the progress-timer to a TQ_SLOT
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<a href="tqobject.html#connect">connect</a>( &timer, TQ_SIGNAL( timeout() ), this, TQ_SLOT( slotTimeout() ) );
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// Let's start with normal speed...
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<a name="x972"></a> normal-><a href="tqradiobutton.html#setChecked">setChecked</a>( TRUE );
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// some contraints
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<a name="x974"></a> start-><a href="tqwidget.html#setFixedWidth">setFixedWidth</a>( 80 );
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<a href="tqwidget.html#setMinimumWidth">setMinimumWidth</a>( 300 );
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}
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/*
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* TQ_SLOT slotStart
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*
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* This TQ_SLOT is called if the user clicks start/pause/continue
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* button
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*/
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void <a name="f347"></a>ProgressBar::slotStart()
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{
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// If the progress bar is at the beginning...
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<a name="x966"></a> if ( progress-><a href="tqprogressbar.html#progress">progress</a>() == -1 ) {
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// ...set according to the checked speed-radiobutton
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// the number of steps which are needed to complete the process
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<a name="x971"></a> if ( slow-><a href="tqradiobutton.html#isChecked">isChecked</a>() )
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<a name="x969"></a> progress-><a href="tqprogressbar.html#setTotalSteps">setTotalSteps</a>( 10000 );
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else if ( normal-><a href="tqradiobutton.html#isChecked">isChecked</a>() )
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progress-><a href="tqprogressbar.html#setTotalSteps">setTotalSteps</a>( 1000 );
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else
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progress-><a href="tqprogressbar.html#setTotalSteps">setTotalSteps</a>( 50 );
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// disable the speed-radiobuttons
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<a name="x973"></a> slow-><a href="tqwidget.html#setEnabled">setEnabled</a>( FALSE );
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normal-><a href="tqwidget.html#setEnabled">setEnabled</a>( FALSE );
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fast-><a href="tqwidget.html#setEnabled">setEnabled</a>( FALSE );
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}
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// If the progress is not running...
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if ( !timer.isActive() ) {
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// ...start the timer (and so the progress) with a interval of 1 ms...
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timer.start( 1 );
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// ...and rename the start/pause/continue button to Pause
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<a name="x963"></a> start-><a href="tqbutton.html#setText">setText</a>( "&Pause" );
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} else { // if the prgress is running...
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// ...stop the timer (and so the prgress)...
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timer.stop();
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// ...and rename the start/pause/continue button to Continue
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start-><a href="tqbutton.html#setText">setText</a>( "&Continue" );
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}
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}
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/*
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* TQ_SLOT slotReset
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*
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* This TQ_SLOT is called when the user clicks the reset button
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*/
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void <a name="f348"></a>ProgressBar::slotReset()
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{
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// stop the timer and progress
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timer.stop();
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// rename the start/pause/continue button to Start...
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start-><a href="tqbutton.html#setText">setText</a>( "&Start" );
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// ...and enable this button
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start-><a href="tqwidget.html#setEnabled">setEnabled</a>( TRUE );
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// enable the speed-radiobuttons
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slow-><a href="tqwidget.html#setEnabled">setEnabled</a>( TRUE );
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normal-><a href="tqwidget.html#setEnabled">setEnabled</a>( TRUE );
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fast-><a href="tqwidget.html#setEnabled">setEnabled</a>( TRUE );
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// reset the progressbar
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<a name="x967"></a> progress-><a href="tqprogressbar.html#reset">reset</a>();
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}
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/*
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* TQ_SLOT slotTimeout
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*
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* This TQ_SLOT is called each ms when the timer is
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* active (== progress is running)
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*/
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void <a name="f349"></a>ProgressBar::slotTimeout()
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{
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int p = progress-><a href="tqprogressbar.html#progress">progress</a>();
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#if 1
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// If the progress is complete...
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<a name="x970"></a> if ( p == progress-><a href="tqprogressbar.html#totalSteps">totalSteps</a>() ) {
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// ...rename the start/pause/continue button to Start...
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start-><a href="tqbutton.html#setText">setText</a>( "&Start" );
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// ...and disable it...
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start-><a href="tqwidget.html#setEnabled">setEnabled</a>( FALSE );
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// ...and return
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return;
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}
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#endif
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// If the process is not complete increase it
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<a name="x968"></a> progress-><a href="tqprogressbar.html#setProgress">setProgress</a>( ++p );
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}
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</pre>
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<p> <hr>
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<p> Main:
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<p> <pre>/****************************************************************************
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** $Id: qt/main.cpp 3.3.8 edited Jan 11 14:37 $
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**
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** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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**
|
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|
** This file is part of an example program for TQt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#include "progressbar.h"
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#include <<a href="qapplication-h.html">ntqapplication.h</a>>
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int main(int argc,char **argv)
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{
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<a href="ntqapplication.html">TQApplication</a> a(argc,argv);
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ProgressBar progressbar;
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progressbar.<a href="tqwidget.html#setCaption">setCaption</a>("TQt Example - ProgressBar");
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a.<a href="ntqapplication.html#setMainWidget">setMainWidget</a>(&progressbar);
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progressbar.<a href="tqwidget.html#show">show</a>();
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return a.<a href="ntqapplication.html#exec">exec</a>();
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}
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</pre>
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<p>See also <a href="examples.html">Examples</a>.
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<!-- eof -->
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<p><address><hr><div align=center>
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<table width=100% cellspacing=0 border=0><tr>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>TQt 3.3.8</div>
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</table></div></address></body>
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