|
|
|
|
<!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 TQt. This example
|
|
|
|
|
** program may be used, distributed and modified without limitation.
|
|
|
|
|
**
|
|
|
|
|
*****************************************************************************/
|
|
|
|
|
|
|
|
|
|
#include <<a href="tqwidget-h.html">tqwidget.h</a>>
|
|
|
|
|
#include <<a href="tqpainter-h.html">tqpainter.h</a>>
|
|
|
|
|
#include <<a href="qprinter-h.html">ntqprinter.h</a>>
|
|
|
|
|
#include <<a href="qpushbutton-h.html">ntqpushbutton.h</a>>
|
|
|
|
|
#include <<a href="qradiobutton-h.html">ntqradiobutton.h</a>>
|
|
|
|
|
#include <<a href="qbuttongroup-h.html">ntqbuttongroup.h</a>>
|
|
|
|
|
#include <<a href="qapplication-h.html">ntqapplication.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="tqpainter.html">TQPainter</a> *p )
|
|
|
|
|
{
|
|
|
|
|
<a href="tqfont.html">TQFont</a> f( "times", 18, TQFont::Bold );
|
|
|
|
|
<a name="x1075"></a> p-><a href="tqpainter.html#setFont">setFont</a>( f );
|
|
|
|
|
<a name="x1076"></a> p-><a href="tqpainter.html#setPen">setPen</a>( TQt::black );
|
|
|
|
|
<a name="x1077"></a> p-><a href="tqpainter.html#setWindow">setWindow</a>( 0, 0, 500, 500 ); // defines coordinate system
|
|
|
|
|
|
|
|
|
|
for ( int i=0; i<36; i++ ) { // draws 36 rotated rectangles
|
|
|
|
|
|
|
|
|
|
<a href="ntqwmatrix.html">TQWMatrix</a> matrix;
|
|
|
|
|
<a name="x1097"></a> matrix.<a href="ntqwmatrix.html#translate">translate</a>( 250.0F, 250.0F ); // move to center
|
|
|
|
|
<a name="x1096"></a> matrix.<a href="ntqwmatrix.html#shear">shear</a>( 0.0F, 0.3F ); // twist it
|
|
|
|
|
<a name="x1095"></a> matrix.<a href="ntqwmatrix.html#rotate">rotate</a>( (float)i*10 ); // rotate 0,10,20,.. degrees
|
|
|
|
|
<a name="x1078"></a> p-><a href="tqpainter.html#setWorldMatrix">setWorldMatrix</a>( matrix ); // use this world matrix
|
|
|
|
|
|
|
|
|
|
<a href="tqcolor.html">TQColor</a> c;
|
|
|
|
|
<a name="x1063"></a> c.<a href="tqcolor.html#setHsv">setHsv</a>( i*10, 255, 255 ); // rainbow effect
|
|
|
|
|
<a name="x1074"></a> p-><a href="tqpainter.html#setBrush">setBrush</a>( c ); // solid fill with color c
|
|
|
|
|
<a name="x1070"></a> p-><a href="tqpainter.html#drawRect">drawRect</a>( 70, -10, 80, 10 ); // draw the rectangle
|
|
|
|
|
|
|
|
|
|
<a href="tqstring.html">TQString</a> n;
|
|
|
|
|
n.<a href="tqstring.html#sprintf">sprintf</a>( "H=%d", i*10 );
|
|
|
|
|
<a name="x1072"></a> p-><a href="tqpainter.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="tqpainter.html">TQPainter</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="tqfont.html">TQFont</a> font( fonts[f], sizes[s] );
|
|
|
|
|
p-><a href="tqpainter.html#setFont">setFont</a>( font );
|
|
|
|
|
<a name="x1073"></a> <a href="tqfontmetrics.html">TQFontMetrics</a> fm = p-><a href="tqpainter.html#fontMetrics">fontMetrics</a>();
|
|
|
|
|
<a name="x1064"></a> y += fm.<a href="tqfontmetrics.html#ascent">ascent</a>();
|
|
|
|
|
p-><a href="tqpainter.html#drawText">drawText</a>( 10, y, "Quartz Glyph Job Vex'd Cwm Finks" );
|
|
|
|
|
<a name="x1065"></a> y += fm.<a href="tqfontmetrics.html#descent">descent</a>();
|
|
|
|
|
s++;
|
|
|
|
|
}
|
|
|
|
|
f++;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// This function draws some shapes
|
|
|
|
|
//
|
|
|
|
|
|
|
|
|
|
void drawShapes( <a href="tqpainter.html">TQPainter</a> *p )
|
|
|
|
|
{
|
|
|
|
|
<a href="tqbrush.html">TQBrush</a> b1( TQt::blue );
|
|
|
|
|
<a href="tqbrush.html">TQBrush</a> b2( TQt::green, TQt::Dense6Pattern ); // green 12% fill
|
|
|
|
|
<a href="tqbrush.html">TQBrush</a> b3( TQt::NoBrush ); // void brush
|
|
|
|
|
<a href="tqbrush.html">TQBrush</a> b4( TQt::CrossPattern ); // black cross pattern
|
|
|
|
|
|
|
|
|
|
p-><a href="tqpainter.html#setPen">setPen</a>( TQt::red );
|
|
|
|
|
p-><a href="tqpainter.html#setBrush">setBrush</a>( b1 );
|
|
|
|
|
p-><a href="tqpainter.html#drawRect">drawRect</a>( 10, 10, 200, 100 );
|
|
|
|
|
p-><a href="tqpainter.html#setBrush">setBrush</a>( b2 );
|
|
|
|
|
<a name="x1071"></a> p-><a href="tqpainter.html#drawRoundRect">drawRoundRect</a>( 10, 150, 200, 100, 20, 20 );
|
|
|
|
|
p-><a href="tqpainter.html#setBrush">setBrush</a>( b3 );
|
|
|
|
|
<a name="x1068"></a> p-><a href="tqpainter.html#drawEllipse">drawEllipse</a>( 250, 10, 200, 100 );
|
|
|
|
|
p-><a href="tqpainter.html#setBrush">setBrush</a>( b4 );
|
|
|
|
|
<a name="x1069"></a> p-><a href="tqpainter.html#drawPie">drawPie</a>( 250, 150, 200, 100, 45*16, 90*16 );
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
typedef void (*draw_func)(TQPainter*);
|
|
|
|
|
|
|
|
|
|
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="tqwidget.html">TQWidget</a>
|
|
|
|
|
{
|
|
|
|
|
<a href="metaobjects.html#TQ_OBJECT">TQ_OBJECT</a>
|
|
|
|
|
public:
|
|
|
|
|
DrawView();
|
|
|
|
|
~DrawView();
|
|
|
|
|
public slots:
|
|
|
|
|
void updateIt( int );
|
|
|
|
|
void printIt();
|
|
|
|
|
protected:
|
|
|
|
|
void drawIt( <a href="tqpainter.html">TQPainter</a> * );
|
|
|
|
|
void paintEvent( <a href="tqpaintevent.html">TQPaintEvent</a> * );
|
|
|
|
|
void resizeEvent( <a href="qresizeevent.html">TQResizeEvent</a> * );
|
|
|
|
|
private:
|
|
|
|
|
<a href="ntqprinter.html">TQPrinter</a> *printer;
|
|
|
|
|
<a href="ntqbuttongroup.html">TQButtonGroup</a> *bgroup;
|
|
|
|
|
<a href="ntqpushbutton.html">TQPushButton</a> *print;
|
|
|
|
|
int drawindex;
|
|
|
|
|
int maxindex;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// Construct the DrawView with buttons.
|
|
|
|
|
//
|
|
|
|
|
|
|
|
|
|
<a name="f367"></a>DrawView::DrawView()
|
|
|
|
|
{
|
|
|
|
|
<a href="tqwidget.html#setCaption">setCaption</a>( "TQt Draw Demo Application" );
|
|
|
|
|
<a href="tqwidget.html#setBackgroundMode">setBackgroundMode</a>(PaletteBase);
|
|
|
|
|
|
|
|
|
|
// Create a button group to contain all buttons
|
|
|
|
|
bgroup = new <a href="ntqbuttongroup.html">TQButtonGroup</a>( this );
|
|
|
|
|
<a name="x1088"></a> bgroup-><a href="tqwidget.html#resize">resize</a>( 200, 200 );
|
|
|
|
|
<a name="x1062"></a> <a href="tqobject.html#connect">connect</a>( bgroup, TQ_SIGNAL(<a href="ntqbuttongroup.html#clicked">clicked</a>(int)), TQ_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="tqfontmetrics.html">TQFontMetrics</a> fm = bgroup-><a href="tqwidget.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="tqfontmetrics.html#width">width</a>( n );
|
|
|
|
|
maxwidth = TQMAX(w,maxwidth); // TQMAX is a macro defined in ntqglobal.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="ntqradiobutton.html">TQRadioButton</a> *rb = new <a href="ntqradiobutton.html">TQRadioButton</a>( n, bgroup );
|
|
|
|
|
<a name="x1091"></a> rb-><a href="tqwidget.html#setGeometry">setGeometry</a>( 10, i*30+10, maxwidth, 30 );
|
|
|
|
|
|
|
|
|
|
maxheight += 30;
|
|
|
|
|
|
|
|
|
|
if ( i == 0 )
|
|
|
|
|
<a name="x1082"></a> rb-><a href="ntqradiobutton.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="tqwidget.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 TQT_NO_PRINTER
|
|
|
|
|
|
|
|
|
|
printer = new <a href="ntqprinter.html">TQPrinter</a>;
|
|
|
|
|
|
|
|
|
|
// Create and setup the print button
|
|
|
|
|
print = new <a href="ntqpushbutton.html">TQPushButton</a>( "Print...", bgroup );
|
|
|
|
|
<a name="x1081"></a> print-><a href="tqwidget.html#resize">resize</a>( 80, 30 );
|
|
|
|
|
<a name="x1093"></a><a name="x1080"></a> print-><a href="tqwidget.html#move">move</a>( maxwidth/2 - print-><a href="tqwidget.html#width">width</a>()/2, maxindex*30+20 );
|
|
|
|
|
<a href="tqobject.html#connect">connect</a>( print, TQ_SIGNAL(<a href="ntqbutton.html#clicked">clicked</a>()), TQ_SLOT(printIt()) );
|
|
|
|
|
|
|
|
|
|
// Resize bgroup to its final size when printersupport is given.
|
|
|
|
|
<a name="x1094"></a><a name="x1085"></a> bgroup-><a href="tqwidget.html#resize">resize</a>( maxwidth, print-><a href="tqwidget.html#y">y</a>()+print-><a href="tqwidget.html#height">height</a>()+10 );
|
|
|
|
|
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
<a href="tqwidget.html#resize">resize</a>( 640,300 );
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// Clean up.
|
|
|
|
|
//
|
|
|
|
|
DrawView::~DrawView()
|
|
|
|
|
{
|
|
|
|
|
#ifndef TQT_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="tqwidget.html#update">update</a>();
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// Calls the drawing function as specified by the radio buttons.
|
|
|
|
|
//
|
|
|
|
|
|
|
|
|
|
void <a name="f369"></a>DrawView::drawIt( <a href="tqpainter.html">TQPainter</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="ntqprinter.html#setup">setup</a>( this ) ) {
|
|
|
|
|
<a href="tqpainter.html">TQPainter</a> paint;
|
|
|
|
|
<a name="x1067"></a> if( !paint.<a href="tqpainter.html#begin">begin</a>( printer ) )
|
|
|
|
|
return;
|
|
|
|
|
drawIt( &paint );
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// Called when the widget needs to be updated.
|
|
|
|
|
//
|
|
|
|
|
|
|
|
|
|
void DrawView::<a href="tqwidget.html#paintEvent">paintEvent</a>( <a href="tqpaintevent.html">TQPaintEvent</a> * )
|
|
|
|
|
{
|
|
|
|
|
<a href="tqpainter.html">TQPainter</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="tqwidget.html#resizeEvent">resizeEvent</a>( <a href="qresizeevent.html">TQResizeEvent</a> * )
|
|
|
|
|
{
|
|
|
|
|
<a name="x1086"></a> bgroup-><a href="tqwidget.html#move">move</a>( <a href="tqwidget.html#width">width</a>()-bgroup-><a href="tqwidget.html#width">width</a>(), 0 );
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// Create and display our widget.
|
|
|
|
|
//
|
|
|
|
|
|
|
|
|
|
#include "drawdemo.moc"
|
|
|
|
|
|
|
|
|
|
int main( int argc, char **argv )
|
|
|
|
|
{
|
|
|
|
|
<a href="ntqapplication.html">TQApplication</a> app( argc, argv );
|
|
|
|
|
DrawView draw;
|
|
|
|
|
app.<a href="ntqapplication.html#setMainWidget">setMainWidget</a>( &draw );
|
|
|
|
|
draw.<a href="tqwidget.html#setCaption">setCaption</a>("TQt Example - Drawdemo");
|
|
|
|
|
draw.<a href="tqwidget.html#show">show</a>();
|
|
|
|
|
return app.<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>
|
