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| author | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
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| committer | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
| commit | bd0f3345a938b35ce6a12f6150373b0955b8dd12 (patch) | |
| tree | 7a520322212d48ebcb9fbe1087e7fca28b76185c /doc/html/progress-example.html | |
| download | qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.tar.gz qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.zip | |
Add Qt3 development HEAD version
Diffstat (limited to 'doc/html/progress-example.html')
| -rw-r--r-- | doc/html/progress-example.html | 390 |
1 files changed, 390 insertions, 0 deletions
diff --git a/doc/html/progress-example.html b/doc/html/progress-example.html new file mode 100644 index 0000000..5719c1f --- /dev/null +++ b/doc/html/progress-example.html @@ -0,0 +1,390 @@ +<!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"><!-- +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 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 Qt. This example +** program may be used, distributed and modified without limitation. +** +*****************************************************************************/ + +#include <<a href="qprogressdialog-h.html">qprogressdialog.h</a>> +#include <<a href="qapplication-h.html">qapplication.h</a>> +#include <<a href="qmenubar-h.html">qmenubar.h</a>> +#include <<a href="qpopupmenu-h.html">qpopupmenu.h</a>> +#include <<a href="qpainter-h.html">qpainter.h</a>> +#include <stdlib.h> + +class AnimatedThingy : public <a href="qlabel.html">QLabel</a> { +public: + AnimatedThingy( <a href="qwidget.html">QWidget</a>* parent, const <a href="qstring.html">QString</a>& s ) : + <a href="qlabel.html">QLabel</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); + QWidget::<a href="qwidget.html#show">show</a>(); + } + + void hide() + { +<a name="x89"></a> QWidget::<a href="qwidget.html#hide">hide</a>(); + killTimers(); + } + + <a href="qsize.html">QSize</a> sizeHint() const + { + return QSize(120,100); + } + +protected: + void timerEvent(QTimerEvent*) + { + <a href="qpainter.html">QPainter</a> p(this); +<a name="x76"></a> <a href="qpen.html">QPen</a> pn=p.<a href="qpainter.html#pen">pen</a>(); +<a name="x80"></a> pn.<a href="qpen.html#setWidth">setWidth</a>(2); +<a name="x79"></a> pn.<a href="qpen.html#setColor">setColor</a>(backgroundColor()); +<a name="x78"></a> p.<a href="qpainter.html#setPen">setPen</a>(pn); + + step = (step + 1) % nqix; + +<a name="x73"></a> p.<a href="qpainter.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="qcolor.html">QColor</a> c; +<a name="x66"></a> c.<a href="qcolor.html#setHsv">setHsv</a>( (step*255)/nqix, 255, 255 ); // rainbow effect + pn.<a href="qpen.html#setColor">setColor</a>(c); + p.<a href="qpainter.html#setPen">setPen</a>(pn); + p.<a href="qpainter.html#drawLine">drawLine</a>(ox[0][step], oy[0][step], ox[1][step], oy[1][step]); + p.<a href="qpainter.html#setPen">setPen</a>(colorGroup().text()); +<a name="x74"></a> p.<a href="qpainter.html#drawText">drawText</a>(rect(), AlignCenter, label); + } + + void paintEvent(QPaintEvent* event) + { + <a href="qpainter.html">QPainter</a> p(this); + <a href="qpen.html">QPen</a> pn=p.<a href="qpainter.html#pen">pen</a>(); + pn.<a href="qpen.html#setWidth">setWidth</a>(2); + p.<a href="qpainter.html#setPen">setPen</a>(pn); +<a name="x77"></a> p.<a href="qpainter.html#setClipRect">setClipRect</a>(event->rect()); + for (int i=0; i<nqix; i++) { + <a href="qcolor.html">QColor</a> c; + c.<a href="qcolor.html#setHsv">setHsv</a>( (i*255)/nqix, 255, 255 ); // rainbow effect + pn.<a href="qpen.html#setColor">setColor</a>(c); + p.<a href="qpainter.html#setPen">setPen</a>(pn); + p.<a href="qpainter.html#drawLine">drawLine</a>(ox[0][i], oy[0][i], ox[1][i], oy[1][i]); + } + p.<a href="qpainter.html#setPen">setPen</a>(colorGroup().text()); + p.<a href="qpainter.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="qstring.html">QString</a> label; + int step; +}; + + +class CPUWaster : public <a href="qwidget.html">QWidget</a> +{ + <a href="metaobjects.html#Q_OBJECT">Q_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="qstring.html">QString</a> drawItemText(int id) + { + <a href="qstring.html">QString</a> str; + str.<a href="qstring.html#sprintf">sprintf</a>("%d Rectangles", drawItemRects(id)); + return str; + } + +public: + CPUWaster() : + pb(0) + { + menubar = new <a href="qmenubar.html">QMenuBar</a>( this, "menu" ); + <a href="qapplication.html#Q_CHECK_PTR">Q_CHECK_PTR</a>( menubar ); + + <a href="qpopupmenu.html">QPopupMenu</a>* file = new <a href="qpopupmenu.html">QPopupMenu</a>(); + <a href="qapplication.html#Q_CHECK_PTR">Q_CHECK_PTR</a>( file ); + menubar-><a href="qmenudata.html#insertItem">insertItem</a>( "&File", file ); + for (int i=first_draw_item; i<=last_draw_item; i++) + file-><a href="qmenudata.html#insertItem">insertItem</a>( drawItemText(i), i ); +<a name="x67"></a> connect( menubar, SIGNAL(<a href="qmenubar.html#activated">activated</a>(int)), this, SLOT(doMenuItem(int)) ); +<a name="x69"></a> file-><a href="qmenudata.html#insertSeparator">insertSeparator</a>(); + file-><a href="qmenudata.html#insertItem">insertItem</a>( "Quit", qApp, SLOT(<a href="qapplication.html#quit">quit</a>()) ); + + options = new <a href="qpopupmenu.html">QPopupMenu</a>(); + <a href="qapplication.html#Q_CHECK_PTR">Q_CHECK_PTR</a>( options ); + menubar-><a href="qmenudata.html#insertItem">insertItem</a>( "&Options", options ); + td_id = options-><a href="qmenudata.html#insertItem">insertItem</a>( "Timer driven", this, SLOT(timerDriven()) ); + ld_id = options-><a href="qmenudata.html#insertItem">insertItem</a>( "Loop driven", this, SLOT(loopDriven()) ); + options-><a href="qmenudata.html#insertSeparator">insertSeparator</a>(); + dl_id = options-><a href="qmenudata.html#insertItem">insertItem</a>( "Default label", this, SLOT(defaultLabel()) ); + cl_id = options-><a href="qmenudata.html#insertItem">insertItem</a>( "Custom label", this, SLOT(customLabel()) ); + options-><a href="qmenudata.html#insertSeparator">insertSeparator</a>(); + md_id = options-><a href="qmenudata.html#insertItem">insertItem</a>( "No minimum duration", this, SLOT(toggleMinimumDuration()) ); +<a name="x81"></a> options-><a href="qpopupmenu.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="qmenudata.html#setItemChecked">setItemChecked</a>( td_id, TRUE ); + options-><a href="qmenudata.html#setItemChecked">setItemChecked</a>( ld_id, FALSE ); + } + + void loopDriven() + { + timer_driven = FALSE; + options-><a href="qmenudata.html#setItemChecked">setItemChecked</a>( ld_id, TRUE ); + options-><a href="qmenudata.html#setItemChecked">setItemChecked</a>( td_id, FALSE ); + } + + void defaultLabel() + { + default_label = TRUE; + options-><a href="qmenudata.html#setItemChecked">setItemChecked</a>( dl_id, TRUE ); + options-><a href="qmenudata.html#setItemChecked">setItemChecked</a>( cl_id, FALSE ); + } + + void customLabel() + { + default_label = FALSE; + options-><a href="qmenudata.html#setItemChecked">setItemChecked</a>( dl_id, FALSE ); + options-><a href="qmenudata.html#setItemChecked">setItemChecked</a>( cl_id, TRUE ); + } + + void toggleMinimumDuration() + { + options-><a href="qmenudata.html#setItemChecked">setItemChecked</a>( md_id, +<a name="x70"></a> !options-><a href="qmenudata.html#isItemChecked">isItemChecked</a>( md_id ) ); + } + +private: + void timerEvent( <a href="qtimerevent.html">QTimerEvent</a>* ) + { + if (!got_stop) +<a name="x86"></a><a name="x85"></a> pb-><a href="qprogressdialog.html#setProgress">setProgress</a>( pb-><a href="qprogressdialog.html#totalSteps">totalSteps</a>() - rects ); + rects--; + + { + <a href="qpainter.html">QPainter</a> p(this); + + int ww = width(); + int wh = height(); + + if ( ww > 8 && wh > 8 ) { + <a href="qcolor.html">QColor</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="qpainter.html#fillRect">fillRect</a>( x, y, w, h, c ); + } + } + + if (!rects || got_stop) { + if (!got_stop) + pb-><a href="qprogressdialog.html#setProgress">setProgress</a>( pb-><a href="qprogressdialog.html#totalSteps">totalSteps</a>() ); + <a href="qpainter.html">QPainter</a> p(this); + p.<a href="qpainter.html#fillRect">fillRect</a>(0, 0, width(), height(), backgroundColor()); + enableDrawingItems(TRUE); + killTimers(); + delete pb; + pb = 0; + } + } + + <a href="qprogressdialog.html">QProgressDialog</a>* newProgressDialog( const char* label, int steps, bool modal ) + { + <a href="qprogressdialog.html">QProgressDialog</a> *d = new <a href="qprogressdialog.html">QProgressDialog</a>(label, "Cancel", steps, this, + "progress", modal); + if ( options-><a href="qmenudata.html#isItemChecked">isItemChecked</a>( md_id ) ) +<a name="x84"></a> d-><a href="qprogressdialog.html#setMinimumDuration">setMinimumDuration</a>(0); + if ( !default_label ) +<a name="x83"></a> d-><a href="qprogressdialog.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="qmenudata.html#setItemEnabled">setItemEnabled</a>(i, yes); + } + } + + void draw(int n) + { + if ( timer_driven ) { + if ( pb ) { + <a href="qapplication.html#qWarning">qWarning</a>("This cannot happen!"); + return; + } + rects = n; + pb = newProgressDialog("Drawing rectangles.\n" + "Using timer event.", n, FALSE); + pb-><a href="qwidget.html#setCaption">setCaption</a>("Please Wait"); +<a name="x82"></a> connect(pb, SIGNAL(<a href="qprogressdialog.html#cancelled">cancelled</a>()), this, SLOT(stopDrawing())); + enableDrawingItems(FALSE); + startTimer(0); + got_stop = FALSE; + } else { + <a href="qprogressdialog.html">QProgressDialog</a>* lpb = newProgressDialog( + "Drawing rectangles.\nUsing loop.", n, TRUE); + lpb-><a href="qwidget.html#setCaption">setCaption</a>("Please Wait"); + + <a href="qpainter.html">QPainter</a> p(this); + for (int i=0; i<n; i++) { + lpb-><a href="qprogressdialog.html#setProgress">setProgress</a>(i); +<a name="x87"></a> if ( lpb-><a href="qprogressdialog.html#wasCancelled">wasCancelled</a>() ) + break; + + <a href="qcolor.html">QColor</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="qpainter.html#fillRect">fillRect</a>(x,y,w,h,c); + } + + p.<a href="qpainter.html#fillRect">fillRect</a>(0, 0, width(), height(), backgroundColor()); + + delete lpb; + } + } + + <a href="qmenubar.html">QMenuBar</a>* menubar; + <a href="qprogressdialog.html">QProgressDialog</a>* pb; + <a href="qpopupmenu.html">QPopupMenu</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="qapplication.html">QApplication</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="qapplication.html#setMainWidget">setMainWidget</a>(cpuw); + cpuw-><a href="qwidget.html#show">show</a>(); + } + return a.<a href="qapplication.html#exec">exec</a>(); +} + +#include "progress.moc" +</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>Qt 3.3.8</div> +</table></div></address></body> +</html> |