<!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 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="qmenubar-h.html">ntqmenubar.h</a>> #include <<a href="qpopupmenu-h.html">ntqpopupmenu.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="ntqwidget.html">TQWidget</a>* parent, const <a href="ntqstring.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="ntqwidget.html#show">show</a>(); } void hide() { <a name="x89"></a> TQWidget::<a href="ntqwidget.html#hide">hide</a>(); killTimers(); } <a href="ntqsize.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="ntqstring.html">TQString</a> label; int step; }; class CPUWaster : public <a href="ntqwidget.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="ntqstring.html">TQString</a> drawItemText(int id) { <a href="ntqstring.html">TQString</a> str; str.<a href="ntqstring.html#sprintf">sprintf</a>("%d Rectangles", drawItemRects(id)); return str; } public: CPUWaster() : pb(0) { menubar = new <a href="ntqmenubar.html">TQMenuBar</a>( this, "menu" ); <a href="ntqapplication.html#TQ_CHECK_PTR">TQ_CHECK_PTR</a>( menubar ); <a href="ntqpopupmenu.html">TQPopupMenu</a>* file = new <a href="ntqpopupmenu.html">TQPopupMenu</a>(); <a href="ntqapplication.html#TQ_CHECK_PTR">TQ_CHECK_PTR</a>( file ); menubar-><a href="ntqmenudata.html#insertItem">insertItem</a>( "&File", file ); for (int i=first_draw_item; i<=last_draw_item; i++) file-><a href="ntqmenudata.html#insertItem">insertItem</a>( drawItemText(i), i ); <a name="x67"></a> connect( menubar, SIGNAL(<a href="ntqmenubar.html#activated">activated</a>(int)), this, SLOT(doMenuItem(int)) ); <a name="x69"></a> file-><a href="ntqmenudata.html#insertSeparator">insertSeparator</a>(); file-><a href="ntqmenudata.html#insertItem">insertItem</a>( "Quit", tqApp, SLOT(<a href="ntqapplication.html#quit">quit</a>()) ); options = new <a href="ntqpopupmenu.html">TQPopupMenu</a>(); <a href="ntqapplication.html#TQ_CHECK_PTR">TQ_CHECK_PTR</a>( options ); menubar-><a href="ntqmenudata.html#insertItem">insertItem</a>( "&Options", options ); td_id = options-><a href="ntqmenudata.html#insertItem">insertItem</a>( "Timer driven", this, SLOT(timerDriven()) ); ld_id = options-><a href="ntqmenudata.html#insertItem">insertItem</a>( "Loop driven", this, SLOT(loopDriven()) ); options-><a href="ntqmenudata.html#insertSeparator">insertSeparator</a>(); dl_id = options-><a href="ntqmenudata.html#insertItem">insertItem</a>( "Default label", this, SLOT(defaultLabel()) ); cl_id = options-><a href="ntqmenudata.html#insertItem">insertItem</a>( "Custom label", this, SLOT(customLabel()) ); options-><a href="ntqmenudata.html#insertSeparator">insertSeparator</a>(); md_id = options-><a href="ntqmenudata.html#insertItem">insertItem</a>( "No minimum duration", this, SLOT(toggleMinimumDuration()) ); <a name="x81"></a> options-><a href="ntqpopupmenu.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="ntqmenudata.html#setItemChecked">setItemChecked</a>( td_id, TRUE ); options-><a href="ntqmenudata.html#setItemChecked">setItemChecked</a>( ld_id, FALSE ); } void loopDriven() { timer_driven = FALSE; options-><a href="ntqmenudata.html#setItemChecked">setItemChecked</a>( ld_id, TRUE ); options-><a href="ntqmenudata.html#setItemChecked">setItemChecked</a>( td_id, FALSE ); } void defaultLabel() { default_label = TRUE; options-><a href="ntqmenudata.html#setItemChecked">setItemChecked</a>( dl_id, TRUE ); options-><a href="ntqmenudata.html#setItemChecked">setItemChecked</a>( cl_id, FALSE ); } void customLabel() { default_label = FALSE; options-><a href="ntqmenudata.html#setItemChecked">setItemChecked</a>( dl_id, FALSE ); options-><a href="ntqmenudata.html#setItemChecked">setItemChecked</a>( cl_id, TRUE ); } void toggleMinimumDuration() { options-><a href="ntqmenudata.html#setItemChecked">setItemChecked</a>( md_id, <a name="x70"></a> !options-><a href="ntqmenudata.html#isItemChecked">isItemChecked</a>( md_id ) ); } private: void timerEvent( <a href="qtimerevent.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="ntqmenudata.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="ntqmenudata.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="ntqwidget.html#setCaption">setCaption</a>("Please Wait"); <a name="x82"></a> connect(pb, SIGNAL(<a href="ntqprogressdialog.html#cancelled">cancelled</a>()), this, 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="ntqwidget.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="ntqmenubar.html">TQMenuBar</a>* menubar; <a href="ntqprogressdialog.html">TQProgressDialog</a>* pb; <a href="ntqpopupmenu.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="ntqwidget.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 --> <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>