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diff --git a/doc/html/drawdemo-example.html b/doc/html/drawdemo-example.html new file mode 100644 index 0000000..bbe1705 --- /dev/null +++ b/doc/html/drawdemo-example.html @@ -0,0 +1,364 @@ +<!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/drawdemo/drawdemo.doc:4 --> +<html> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> +<title>Draw Demo</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>Draw Demo</h1> + + +<p> +This example demonstrates several drawing functions and printer output. +You can easily add you own drawing functions. +<p> <hr> +<p> Implementation: +<p> <pre>/**************************************************************************** +** $Id: qt/drawdemo.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="qwidget-h.html">qwidget.h</a>> +#include <<a href="qpainter-h.html">qpainter.h</a>> +#include <<a href="qprinter-h.html">qprinter.h</a>> +#include <<a href="qpushbutton-h.html">qpushbutton.h</a>> +#include <<a href="qradiobutton-h.html">qradiobutton.h</a>> +#include <<a href="qbuttongroup-h.html">qbuttongroup.h</a>> +#include <<a href="qapplication-h.html">qapplication.h</a>> +#include <math.h> + +// +// First we define the functionality our demo should present +// to the user. You might add different demo-modes if you wish so. +// + +// +// This function draws a color wheel. +// The coordinate system x=(0..500), y=(0..500) spans the paint device. +// + +void drawColorWheel( <a href="qpainter.html">QPainter</a> *p ) +{ + <a href="qfont.html">QFont</a> f( "times", 18, QFont::Bold ); +<a name="x1075"></a> p-><a href="qpainter.html#setFont">setFont</a>( f ); +<a name="x1076"></a> p-><a href="qpainter.html#setPen">setPen</a>( Qt::black ); +<a name="x1077"></a> p-><a href="qpainter.html#setWindow">setWindow</a>( 0, 0, 500, 500 ); // defines coordinate system + + for ( int i=0; i<36; i++ ) { // draws 36 rotated rectangles + + <a href="qwmatrix.html">QWMatrix</a> matrix; +<a name="x1097"></a> matrix.<a href="qwmatrix.html#translate">translate</a>( 250.0F, 250.0F ); // move to center +<a name="x1096"></a> matrix.<a href="qwmatrix.html#shear">shear</a>( 0.0F, 0.3F ); // twist it +<a name="x1095"></a> matrix.<a href="qwmatrix.html#rotate">rotate</a>( (float)i*10 ); // rotate 0,10,20,.. degrees +<a name="x1078"></a> p-><a href="qpainter.html#setWorldMatrix">setWorldMatrix</a>( matrix ); // use this world matrix + + <a href="qcolor.html">QColor</a> c; +<a name="x1063"></a> c.<a href="qcolor.html#setHsv">setHsv</a>( i*10, 255, 255 ); // rainbow effect +<a name="x1074"></a> p-><a href="qpainter.html#setBrush">setBrush</a>( c ); // solid fill with color c +<a name="x1070"></a> p-><a href="qpainter.html#drawRect">drawRect</a>( 70, -10, 80, 10 ); // draw the rectangle + + <a href="qstring.html">QString</a> n; + n.<a href="qstring.html#sprintf">sprintf</a>( "H=%d", i*10 ); +<a name="x1072"></a> p-><a href="qpainter.html#drawText">drawText</a>( 80+70+5, 0, n ); // draw the hue number + } +} + + +// +// This function draws a few lines of text using different fonts. +// + +void drawFonts( <a href="qpainter.html">QPainter</a> *p ) +{ + static const char *fonts[] = { "Helvetica", "Courier", "Times", 0 }; + static int sizes[] = { 10, 12, 18, 24, 36, 0 }; + int f = 0; + int y = 0; + while ( fonts[f] ) { + int s = 0; + while ( sizes[s] ) { + <a href="qfont.html">QFont</a> font( fonts[f], sizes[s] ); + p-><a href="qpainter.html#setFont">setFont</a>( font ); +<a name="x1073"></a> <a href="qfontmetrics.html">QFontMetrics</a> fm = p-><a href="qpainter.html#fontMetrics">fontMetrics</a>(); +<a name="x1064"></a> y += fm.<a href="qfontmetrics.html#ascent">ascent</a>(); + p-><a href="qpainter.html#drawText">drawText</a>( 10, y, "Quartz Glyph Job Vex'd Cwm Finks" ); +<a name="x1065"></a> y += fm.<a href="qfontmetrics.html#descent">descent</a>(); + s++; + } + f++; + } +} + + +// +// This function draws some shapes +// + +void drawShapes( <a href="qpainter.html">QPainter</a> *p ) +{ + <a href="qbrush.html">QBrush</a> b1( Qt::blue ); + <a href="qbrush.html">QBrush</a> b2( Qt::green, Qt::Dense6Pattern ); // green 12% fill + <a href="qbrush.html">QBrush</a> b3( Qt::NoBrush ); // void brush + <a href="qbrush.html">QBrush</a> b4( Qt::CrossPattern ); // black cross pattern + + p-><a href="qpainter.html#setPen">setPen</a>( Qt::red ); + p-><a href="qpainter.html#setBrush">setBrush</a>( b1 ); + p-><a href="qpainter.html#drawRect">drawRect</a>( 10, 10, 200, 100 ); + p-><a href="qpainter.html#setBrush">setBrush</a>( b2 ); +<a name="x1071"></a> p-><a href="qpainter.html#drawRoundRect">drawRoundRect</a>( 10, 150, 200, 100, 20, 20 ); + p-><a href="qpainter.html#setBrush">setBrush</a>( b3 ); +<a name="x1068"></a> p-><a href="qpainter.html#drawEllipse">drawEllipse</a>( 250, 10, 200, 100 ); + p-><a href="qpainter.html#setBrush">setBrush</a>( b4 ); +<a name="x1069"></a> p-><a href="qpainter.html#drawPie">drawPie</a>( 250, 150, 200, 100, 45*16, 90*16 ); +} + + +typedef void (*draw_func)(QPainter*); + +struct DrawThing { + draw_func f; + const char *name; +}; + +// +// All previously implemented functions are collected +// in the following "table". +// If you implement different functionality, your new draw +// function must be assigned here with a function pointer and +// description. +// Leave the zeros at the end, they will be used +// as markers referring to the end of the array. +// + +DrawThing ourDrawFunctions[] = { +// name of the function, title presented to the user + { drawColorWheel, "Draw color wheel" }, + { drawFonts, "Draw fonts" }, + { drawShapes, "Draw shapes" }, + { 0, 0 } }; + + + +class DrawView : public <a href="qwidget.html">QWidget</a> +{ + <a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a> +public: + DrawView(); + ~DrawView(); +public slots: + void updateIt( int ); + void printIt(); +protected: + void drawIt( <a href="qpainter.html">QPainter</a> * ); + void paintEvent( <a href="qpaintevent.html">QPaintEvent</a> * ); + void resizeEvent( <a href="qresizeevent.html">QResizeEvent</a> * ); +private: + <a href="qprinter.html">QPrinter</a> *printer; + <a href="qbuttongroup.html">QButtonGroup</a> *bgroup; + <a href="qpushbutton.html">QPushButton</a> *print; + int drawindex; + int maxindex; +}; + + +// +// Construct the DrawView with buttons. +// + +<a name="f367"></a>DrawView::DrawView() +{ + <a href="qwidget.html#setCaption">setCaption</a>( "Qt Draw Demo Application" ); + <a href="qwidget.html#setBackgroundMode">setBackgroundMode</a>(PaletteBase); + + // Create a button group to contain all buttons + bgroup = new <a href="qbuttongroup.html">QButtonGroup</a>( this ); +<a name="x1088"></a> bgroup-><a href="qwidget.html#resize">resize</a>( 200, 200 ); +<a name="x1062"></a> <a href="qobject.html#connect">connect</a>( bgroup, SIGNAL(<a href="qbuttongroup.html#clicked">clicked</a>(int)), SLOT(updateIt(int)) ); + + // Calculate the size for the radio buttons + int maxwidth = 80; + int maxheight = 10; + int i; + const char *n; +<a name="x1084"></a> <a href="qfontmetrics.html">QFontMetrics</a> fm = bgroup-><a href="qwidget.html#fontMetrics">fontMetrics</a>(); + + // Find out the longest function description. + // Here we make use of the last "0,0"-entry in the + // ourDrawFunctions-array. + for ( i=0; (n=ourDrawFunctions[i].name) != 0; i++ ) { +<a name="x1066"></a> int w = fm.<a href="qfontmetrics.html#width">width</a>( n ); + maxwidth = QMAX(w,maxwidth); // QMAX is a macro defined in qglobal.h + // and returns the biggest of to values. + // Due to its macro nature one should use it with care and with + // constant parameters only. + } + + maxwidth = maxwidth + 30; // allow 30 pixels for radiobuttons + + for ( i=0; (n=ourDrawFunctions[i].name) != 0; i++ ) { + <a href="qradiobutton.html">QRadioButton</a> *rb = new <a href="qradiobutton.html">QRadioButton</a>( n, bgroup ); +<a name="x1091"></a> rb-><a href="qwidget.html#setGeometry">setGeometry</a>( 10, i*30+10, maxwidth, 30 ); + + maxheight += 30; + + if ( i == 0 ) +<a name="x1082"></a> rb-><a href="qradiobutton.html#setChecked">setChecked</a>( TRUE ); + } + + maxheight += 10; // maxheight is now 10 pixels upper margin + // plus number_of_drawfunctions * 30 + // plus 10 pixels lower margin + + drawindex = 0; // draw first thing + maxindex = i; + + maxwidth += 20; // add some margin, this results in the + // final width of bgroup + + bgroup-><a href="qwidget.html#resize">resize</a>( maxwidth, maxheight ); // resize bgroup to its final size + // when no printersupport is provided + + +// If -- at compile time -- printer support will be disabled, +// we won't set up printing functionality. + +#ifndef QT_NO_PRINTER + + printer = new <a href="qprinter.html">QPrinter</a>; + + // Create and setup the print button + print = new <a href="qpushbutton.html">QPushButton</a>( "Print...", bgroup ); +<a name="x1081"></a> print-><a href="qwidget.html#resize">resize</a>( 80, 30 ); +<a name="x1093"></a><a name="x1080"></a> print-><a href="qwidget.html#move">move</a>( maxwidth/2 - print-><a href="qwidget.html#width">width</a>()/2, maxindex*30+20 ); + <a href="qobject.html#connect">connect</a>( print, SIGNAL(<a href="qbutton.html#clicked">clicked</a>()), SLOT(printIt()) ); + + // Resize bgroup to its final size when printersupport is given. +<a name="x1094"></a><a name="x1085"></a> bgroup-><a href="qwidget.html#resize">resize</a>( maxwidth, print-><a href="qwidget.html#y">y</a>()+print-><a href="qwidget.html#height">height</a>()+10 ); + +#endif + + <a href="qwidget.html#resize">resize</a>( 640,300 ); +} + +// +// Clean up. +// +DrawView::~DrawView() +{ +#ifndef QT_NO_PRINTER + delete printer; +#endif +} + +// +// Called when a radio button is clicked. +// + +void <a name="f368"></a>DrawView::updateIt( int index ) +{ + if ( index < maxindex ) { + drawindex = index; + <a href="qwidget.html#update">update</a>(); + } +} + +// +// Calls the drawing function as specified by the radio buttons. +// + +void <a name="f369"></a>DrawView::drawIt( <a href="qpainter.html">QPainter</a> *p ) +{ + (*ourDrawFunctions[drawindex].f)(p); +} + +// +// Called when the print button is clicked. +// + +void <a name="f370"></a>DrawView::printIt() +{ +<a name="x1079"></a> if ( printer-><a href="qprinter.html#setup">setup</a>( this ) ) { + <a href="qpainter.html">QPainter</a> paint; +<a name="x1067"></a> if( !paint.<a href="qpainter.html#begin">begin</a>( printer ) ) + return; + drawIt( &paint ); + } +} + +// +// Called when the widget needs to be updated. +// + +void DrawView::<a href="qwidget.html#paintEvent">paintEvent</a>( <a href="qpaintevent.html">QPaintEvent</a> * ) +{ + <a href="qpainter.html">QPainter</a> paint( this ); + drawIt( &paint ); +} + +// +// Called when the widget has been resized. +// Moves the button group to the upper right corner +// of the widget. + +<a name="x1089"></a>void DrawView::<a href="qwidget.html#resizeEvent">resizeEvent</a>( <a href="qresizeevent.html">QResizeEvent</a> * ) +{ +<a name="x1086"></a> bgroup-><a href="qwidget.html#move">move</a>( <a href="qwidget.html#width">width</a>()-bgroup-><a href="qwidget.html#width">width</a>(), 0 ); +} + + +// +// Create and display our widget. +// + +#include "drawdemo.moc" + +int main( int argc, char **argv ) +{ + <a href="qapplication.html">QApplication</a> app( argc, argv ); + DrawView draw; + app.<a href="qapplication.html#setMainWidget">setMainWidget</a>( &draw ); + draw.<a href="qwidget.html#setCaption">setCaption</a>("Qt Example - Drawdemo"); + draw.<a href="qwidget.html#show">show</a>(); + return app.<a href="qapplication.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>Qt 3.3.8</div> +</table></div></address></body> +</html> |