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tqt3/doc/html/xform-example.html

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<!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/xform/xform.doc:4 -->
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Transformed Graphics Demo</title>
<style type="text/css"><!--
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</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>
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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>Transformed Graphics Demo</h1>
<p>
This example lets the user rotate, shear and scale text and graphics
arbitrarily.
<p> <hr>
<p> Implementation:
<p> <pre>/****************************************************************************
** $Id: qt/xform.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 &lt;<a href="qapplication-h.html">ntqapplication.h</a>&gt;
#include &lt;<a href="tqdialog-h.html">tqdialog.h</a>&gt;
#include &lt;<a href="tqlabel-h.html">tqlabel.h</a>&gt;
#include &lt;<a href="tqlineedit-h.html">tqlineedit.h</a>&gt;
#include &lt;<a href="tqpushbutton-h.html">tqpushbutton.h</a>&gt;
#include &lt;<a href="tqcheckbox-h.html">tqcheckbox.h</a>&gt;
#include &lt;<a href="tqradiobutton-h.html">tqradiobutton.h</a>&gt;
#include &lt;<a href="tqbuttongroup-h.html">tqbuttongroup.h</a>&gt;
#include &lt;<a href="tqlcdnumber-h.html">tqlcdnumber.h</a>&gt;
#include &lt;<a href="tqslider-h.html">tqslider.h</a>&gt;
#include &lt;<a href="tqmenubar-h.html">tqmenubar.h</a>&gt;
#include &lt;<a href="tqfontdialog-h.html">tqfontdialog.h</a>&gt;
#include &lt;<a href="tqlayout-h.html">tqlayout.h</a>&gt;
#include &lt;<a href="tqvbox-h.html">tqvbox.h</a>&gt;
#include &lt;<a href="tqwidgetstack-h.html">tqwidgetstack.h</a>&gt;
#include &lt;<a href="tqpainter-h.html">tqpainter.h</a>&gt;
#include &lt;<a href="tqpixmap-h.html">tqpixmap.h</a>&gt;
#include &lt;<a href="tqpicture-h.html">tqpicture.h</a>&gt;
#include &lt;stdlib.h&gt;
class ModeNames {
public:
enum Mode { Text, Image, Picture };
};
class XFormControl : public <a href="tqvbox.html">TQVBox</a>, public ModeNames
{
<a href="metaobjects.html#TQ_OBJECT">TQ_OBJECT</a>
public:
XFormControl( const <a href="tqfont.html">TQFont</a> &amp;initialFont, TQWidget *parent=0, const char *name=0 );
~XFormControl() {}
<a href="tqwmatrix.html">TQWMatrix</a> matrix();
signals:
void newMatrix( <a href="tqwmatrix.html">TQWMatrix</a> );
void newText( const <a href="tqstring.html">TQString</a>&amp; );
void newFont( const <a href="tqfont.html">TQFont</a> &amp; );
void newMode( int );
private slots:
void newMtx();
void newTxt(const <a href="tqstring.html">TQString</a>&amp;);
void selectFont();
void fontSelected( const <a href="tqfont.html">TQFont</a> &amp; );
void changeMode(int);
void timerEvent(TQTimerEvent*);
private:
Mode mode;
<a href="tqslider.html">TQSlider</a> *rotS; // Rotation angle scroll bar
<a href="tqslider.html">TQSlider</a> *shearS; // Shear value scroll bar
<a href="tqslider.html">TQSlider</a> *magS; // Magnification value scroll bar
<a href="tqlcdnumber.html">TQLCDNumber</a> *rotLCD; // Rotation angle LCD display
<a href="tqlcdnumber.html">TQLCDNumber</a> *shearLCD; // Shear value LCD display
<a href="tqlcdnumber.html">TQLCDNumber</a> *magLCD; // Magnification value LCD display
<a href="tqcheckbox.html">TQCheckBox</a> *mirror; // Checkbox for mirror image on/of
<a href="tqwidgetstack.html">TQWidgetStack</a>* optionals;
<a href="tqlineedit.html">TQLineEdit</a> *textEd; // Inp[ut field for xForm text
<a href="tqpushbutton.html">TQPushButton</a> *fpb; // Select font push button
<a href="tqradiobutton.html">TQRadioButton</a> *rb_txt; // Radio button for text
<a href="tqradiobutton.html">TQRadioButton</a> *rb_img; // Radio button for image
<a href="tqradiobutton.html">TQRadioButton</a> *rb_pic; // Radio button for picture
<a href="tqfont.html">TQFont</a> currentFont;
};
/*
ShowXForm displays a text or a pixmap (TQPixmap) using a coordinate
<a href="tqwmatrix.html#TransformationMode">transformation matrix</a> (TQWMatrix)
*/
class ShowXForm : public <a href="tqwidget.html">TQWidget</a>, public ModeNames
{
TQ_OBJECT
public:
ShowXForm( const <a href="tqfont.html">TQFont</a> &amp;f, TQWidget *parent=0, const char *name=0 );
~ShowXForm() {}
void showIt(); // (Re)displays text or pixmap
Mode mode() const { return m; }
public slots:
void setText( const <a href="tqstring.html">TQString</a>&amp; );
void setMatrix( <a href="tqwmatrix.html">TQWMatrix</a> );
void setFont( const <a href="tqfont.html">TQFont</a> &amp;f );
void setPixmap( <a href="tqpixmap.html">TQPixmap</a> );
void setPicture( const <a href="tqpicture.html">TQPicture</a>&amp; );
void setMode( int );
private:
<a href="tqsizepolicy.html">TQSizePolicy</a> sizePolicy() const;
<a href="tqsize.html">TQSize</a> sizeHint() const;
void paintEvent( <a href="tqpaintevent.html">TQPaintEvent</a> * );
void resizeEvent( <a href="tqresizeevent.html">TQResizeEvent</a> * );
<a href="tqwmatrix.html">TQWMatrix</a> mtx; // coordinate transform matrix
<a href="tqstring.html">TQString</a> text; // text to be displayed
<a href="tqpixmap.html">TQPixmap</a> pix; // pixmap to be displayed
<a href="tqpicture.html">TQPicture</a> picture; // text to be displayed
<a href="tqrect.html">TQRect</a> eraseRect; // covers last displayed text/pixmap
Mode m;
};
<a name="f397"></a>XFormControl::XFormControl( const <a href="tqfont.html">TQFont</a> &amp;initialFont,
<a href="tqwidget.html">TQWidget</a> *parent, const char *name )
: <a href="tqvbox.html">TQVBox</a>( parent, name )
{
<a href="tqhbox.html#setSpacing">setSpacing</a>(6);
<a href="tqframe.html#setMargin">setMargin</a>(6);
currentFont = initialFont;
mode = Image;
rotLCD = new <a href="tqlcdnumber.html">TQLCDNumber</a>( 4, this, "rotateLCD" );
rotS = new <a href="tqslider.html">TQSlider</a>( TQSlider::Horizontal, this,
"rotateSlider" );
shearLCD = new <a href="tqlcdnumber.html">TQLCDNumber</a>( 5,this, "shearLCD" );
shearS = new <a href="tqslider.html">TQSlider</a>( TQSlider::Horizontal, this,
"shearSlider" );
mirror = new <a href="tqcheckbox.html">TQCheckBox</a>( this, "mirrorCheckBox" );
rb_txt = new <a href="tqradiobutton.html">TQRadioButton</a>( this, "text" );
rb_img = new <a href="tqradiobutton.html">TQRadioButton</a>( this, "image" );
rb_pic = new <a href="tqradiobutton.html">TQRadioButton</a>( this, "picture" );
optionals = new <a href="tqwidgetstack.html">TQWidgetStack</a>(this);
<a href="tqvbox.html">TQVBox</a>* optionals_text = new <a href="tqvbox.html">TQVBox</a>(optionals);
<a name="x1228"></a> optionals_text-&gt;<a href="tqhbox.html#setSpacing">setSpacing</a>(6);
<a href="tqvbox.html">TQVBox</a>* optionals_other = new <a href="tqvbox.html">TQVBox</a>(optionals);
optionals_other-&gt;<a href="tqhbox.html#setSpacing">setSpacing</a>(6);
<a name="x1276"></a> optionals-&gt;<a href="tqwidgetstack.html#addWidget">addWidget</a>(optionals_text,0);
optionals-&gt;<a href="tqwidgetstack.html#addWidget">addWidget</a>(optionals_other,1);
fpb = new <a href="tqpushbutton.html">TQPushButton</a>( optionals_text, "text" );
textEd = new <a href="tqlineedit.html">TQLineEdit</a>( optionals_text, "text" );
textEd-&gt;<a href="tqwidget.html#setFocus">setFocus</a>();
<a name="x1229"></a> rotLCD-&gt;<a href="tqlcdnumber.html#display">display</a>( " 0'" );
<a name="x1250"></a> rotS-&gt;<a href="tqrangecontrol.html#setRange">setRange</a>( -180, 180 );
<a name="x1261"></a> rotS-&gt;<a href="tqslider.html#setValue">setValue</a>( 0 );
<a name="x1263"></a> <a href="tqobject.html#connect">connect</a>( rotS, TQ_SIGNAL(<a href="tqslider.html#valueChanged">valueChanged</a>(int)), TQ_SLOT(newMtx()) );
shearLCD-&gt;<a href="tqlcdnumber.html#display">display</a>( "0.00" );
shearS-&gt;<a href="tqrangecontrol.html#setRange">setRange</a>( -25, 25 );
shearS-&gt;<a href="tqslider.html#setValue">setValue</a>( 0 );
<a href="tqobject.html#connect">connect</a>( shearS, TQ_SIGNAL(<a href="tqslider.html#valueChanged">valueChanged</a>(int)), TQ_SLOT(newMtx()) );
<a name="x1220"></a> mirror-&gt;<a href="tqbutton.html#setText">setText</a>( <a href="tqobject.html#tr">tr</a>("Mirror") );
<a href="tqobject.html#connect">connect</a>( mirror, TQ_SIGNAL(<a href="tqbutton.html#clicked">clicked</a>()), TQ_SLOT(newMtx()) );
<a href="tqbuttongroup.html">TQButtonGroup</a> *bg = new <a href="tqbuttongroup.html">TQButtonGroup</a>(this);
<a name="x1267"></a> bg-&gt;<a href="tqwidget.html#hide">hide</a>();
<a name="x1222"></a> bg-&gt;<a href="tqbuttongroup.html#insert">insert</a>(rb_txt,0);
bg-&gt;<a href="tqbuttongroup.html#insert">insert</a>(rb_img,1);
bg-&gt;<a href="tqbuttongroup.html#insert">insert</a>(rb_pic,2);
rb_txt-&gt;<a href="tqbutton.html#setText">setText</a>( <a href="tqobject.html#tr">tr</a>("Text") );
rb_img-&gt;<a href="tqbutton.html#setText">setText</a>( <a href="tqobject.html#tr">tr</a>("Image") );
<a name="x1249"></a> rb_img-&gt;<a href="tqradiobutton.html#setChecked">setChecked</a>(TRUE);
rb_pic-&gt;<a href="tqbutton.html#setText">setText</a>( <a href="tqobject.html#tr">tr</a>("Picture") );
<a name="x1221"></a> <a href="tqobject.html#connect">connect</a>( bg, TQ_SIGNAL(<a href="tqbuttongroup.html#clicked">clicked</a>(int)), TQ_SLOT(changeMode(int)) );
fpb-&gt;<a href="tqbutton.html#setText">setText</a>( <a href="tqobject.html#tr">tr</a>("Select font...") );
<a href="tqobject.html#connect">connect</a>( fpb, TQ_SIGNAL(<a href="tqbutton.html#clicked">clicked</a>()), TQ_SLOT(selectFont()) );
<a name="x1230"></a> textEd-&gt;<a href="tqlineedit.html#setText">setText</a>( "Troll" );
<a name="x1231"></a> <a href="tqobject.html#connect">connect</a>( textEd, TQ_SIGNAL(<a href="tqlineedit.html#textChanged">textChanged</a>(const <a href="tqstring.html">TQString</a>&amp;)),
TQ_SLOT(newTxt(const <a href="tqstring.html">TQString</a>&amp;)) );
magLCD = new <a href="tqlcdnumber.html">TQLCDNumber</a>( 4,optionals_other, "magLCD" );
magLCD-&gt;<a href="tqlcdnumber.html#display">display</a>( "100" );
magS = new <a href="tqslider.html">TQSlider</a>( TQSlider::Horizontal, optionals_other,
"magnifySlider" );
magS-&gt;<a href="tqrangecontrol.html#setRange">setRange</a>( 0, 800 );
<a href="tqobject.html#connect">connect</a>( magS, TQ_SIGNAL(<a href="tqslider.html#valueChanged">valueChanged</a>(int)), TQ_SLOT(newMtx()) );
magS-&gt;<a href="tqslider.html#setValue">setValue</a>( 0 );
<a href="tqobject.html#connect">connect</a>( magS, TQ_SIGNAL(<a href="tqslider.html#valueChanged">valueChanged</a>(int)), magLCD, TQ_SLOT(<a href="tqlcdnumber.html#display">display</a>(int)));
<a name="x1266"></a> optionals_text-&gt;<a href="tqwidget.html#adjustSize">adjustSize</a>();
optionals_other-&gt;<a href="tqwidget.html#adjustSize">adjustSize</a>();
changeMode(Image);
<a href="tqobject.html#startTimer">startTimer</a>(20); // start an initial animation
}
<a name="x1232"></a>void XFormControl::<a href="tqobject.html#timerEvent">timerEvent</a>(TQTimerEvent*)
{
<a name="x1262"></a> int v = magS-&gt;<a href="tqslider.html#value">value</a>();
v = (v+2)+v/10;
if ( v &gt;= 200 ) {
v = 200;
<a href="tqobject.html#killTimers">killTimers</a>();
}
magS-&gt;<a href="tqslider.html#setValue">setValue</a>(v);
}
/*
Called whenever the user has changed one of the matrix parameters
(i.e. rotate, shear or magnification)
*/
void <a name="f398"></a>XFormControl::newMtx()
{
emit newMatrix( matrix() );
}
void <a name="f399"></a>XFormControl::newTxt(const <a href="tqstring.html">TQString</a>&amp; s)
{
emit newText(s);
changeMode(Text);
}
/*
Calculates the matrix appropriate for the current controls,
and updates the displays.
*/
TQWMatrix <a name="f400"></a>XFormControl::matrix()
{
<a href="tqwmatrix.html">TQWMatrix</a> m;
if (mode != Text) {
double magVal = 1.0*magS-&gt;<a href="tqslider.html#value">value</a>()/100;
<a name="x1281"></a> m.<a href="tqwmatrix.html#scale">scale</a>( magVal, magVal );
}
double shearVal = 1.0*shearS-&gt;<a href="tqslider.html#value">value</a>()/25;
<a name="x1282"></a> m.<a href="tqwmatrix.html#shear">shear</a>( shearVal, shearVal );
<a name="x1280"></a> m.<a href="tqwmatrix.html#rotate">rotate</a>( rotS-&gt;<a href="tqslider.html#value">value</a>() );
<a name="x1223"></a> if ( mirror-&gt;<a href="tqcheckbox.html#isChecked">isChecked</a>() ) {
m.<a href="tqwmatrix.html#scale">scale</a>( 1, -1 );
m.<a href="tqwmatrix.html#rotate">rotate</a>( 180 );
}
<a href="tqstring.html">TQString</a> tmp;
<a name="x1265"></a> tmp.<a href="tqstring.html#sprintf">sprintf</a>( "%1.2f", shearVal );
if ( shearVal &gt;= 0 )
<a name="x1264"></a> tmp.<a href="tqstring.html#insert">insert</a>( 0, " " );
shearLCD-&gt;<a href="tqlcdnumber.html#display">display</a>( tmp );
int rot = rotS-&gt;<a href="tqslider.html#value">value</a>();
if ( rot &lt; 0 )
rot = rot + 360;
tmp.<a href="tqstring.html#sprintf">sprintf</a>( "%3i'", rot );
rotLCD-&gt;<a href="tqlcdnumber.html#display">display</a>( tmp );
return m;
}
void <a name="f401"></a>XFormControl::selectFont()
{
bool ok;
<a name="x1224"></a> <a href="tqfont.html">TQFont</a> f = TQFontDialog::<a href="tqfontdialog.html#getFont">getFont</a>( &amp;ok, currentFont );
if ( ok ) {
currentFont = f;
fontSelected( f );
}
}
void <a name="f402"></a>XFormControl::fontSelected( const <a href="tqfont.html">TQFont</a> &amp;font )
{
emit newFont( font );
changeMode(Text);
}
/*
Sets the mode - Text, Image, or Picture.
*/
void <a name="f403"></a>XFormControl::changeMode(int m)
{
mode = (Mode)m;
emit newMode( m );
newMtx();
if ( mode == Text ) {
<a name="x1277"></a> optionals-&gt;<a href="tqwidgetstack.html#raiseWidget">raiseWidget</a>(0);
rb_txt-&gt;<a href="tqradiobutton.html#setChecked">setChecked</a>(TRUE);
} else {
optionals-&gt;<a href="tqwidgetstack.html#raiseWidget">raiseWidget</a>(1);
if ( mode == Image )
rb_img-&gt;<a href="tqradiobutton.html#setChecked">setChecked</a>(TRUE);
else
rb_pic-&gt;<a href="tqradiobutton.html#setChecked">setChecked</a>(TRUE);
}
<a name="x1217"></a> tqApp-&gt;<a href="ntqapplication.html#flushX">flushX</a>();
}
<a name="f388"></a>ShowXForm::ShowXForm( const <a href="tqfont.html">TQFont</a> &amp;initialFont,
<a href="tqwidget.html">TQWidget</a> *parent, const char *name )
: <a href="tqwidget.html">TQWidget</a>( parent, name, WResizeNoErase )
{
<a href="tqwidget.html#setFont">setFont</a>( initialFont );
<a href="tqwidget.html#setBackgroundColor">setBackgroundColor</a>( white );
m = Text;
eraseRect = TQRect( 0, 0, 0, 0 );
}
<a name="x1275"></a>TQSizePolicy ShowXForm::<a href="tqwidget.html#sizePolicy">sizePolicy</a>() const
{
return TQSizePolicy( TQSizePolicy::Expanding, TQSizePolicy::Expanding );
}
<a name="x1274"></a>TQSize ShowXForm::<a href="tqwidget.html#sizeHint">sizeHint</a>() const
{
return TQSize(400,400);
}
void ShowXForm::<a href="tqwidget.html#paintEvent">paintEvent</a>( <a href="tqpaintevent.html">TQPaintEvent</a> * )
{
showIt();
}
<a name="x1269"></a>void ShowXForm::<a href="tqwidget.html#resizeEvent">resizeEvent</a>( <a href="tqresizeevent.html">TQResizeEvent</a> * )
{
eraseRect = TQRect( <a href="tqwidget.html#width">width</a>()/2, height()/2, 0, 0 );
<a href="tqwidget.html#repaint">repaint</a>(<a href="tqwidget.html#rect">rect</a>());
}
void <a name="f389"></a>ShowXForm::setText( const <a href="tqstring.html">TQString</a>&amp; s )
{
text = s;
showIt();
}
void <a name="f390"></a>ShowXForm::setMatrix( <a href="tqwmatrix.html">TQWMatrix</a> w )
{
mtx = w;
showIt();
}
<a name="x1272"></a>void ShowXForm::<a href="tqwidget.html#setFont">setFont</a>( const <a href="tqfont.html">TQFont</a> &amp;f )
{
m = Text;
TQWidget::<a href="tqwidget.html#setFont">setFont</a>( f );
}
void <a name="f391"></a>ShowXForm::setPixmap( <a href="tqpixmap.html">TQPixmap</a> pm )
{
pix = pm;
m = Image;
showIt();
}
void <a name="f392"></a>ShowXForm::setPicture( const <a href="tqpicture.html">TQPicture</a>&amp; p )
{
picture = p;
m = Picture;
showIt();
}
void <a name="f393"></a>ShowXForm::setMode( int mode )
{
m = (Mode)mode;
}
void <a name="f394"></a>ShowXForm::showIt()
{
<a href="tqpainter.html">TQPainter</a> p;
<a href="tqrect.html">TQRect</a> r; // rectangle covering new text/pixmap in virtual coordinates
<a href="tqwmatrix.html">TQWMatrix</a> um; // copy user specified transform
int textYPos = 0; // distance from boundingRect y pos to baseline
int textXPos = 0; // distance from boundingRect x pos to text start
<a href="tqrect.html">TQRect</a> br;
<a href="tqfontmetrics.html">TQFontMetrics</a> fm( <a href="tqwidget.html#fontMetrics">fontMetrics</a>() ); // get widget font metrics
switch ( mode() ) {
case Text:
<a name="x1225"></a> br = fm.<a href="tqfontmetrics.html#boundingRect">boundingRect</a>( text ); // rectangle covering text
r = br;
textYPos = -r.<a href="tqrect.html#y">y</a>();
textXPos = -r.<a href="tqrect.html#x">x</a>();
<a name="x1258"></a><a name="x1254"></a><a name="x1251"></a> br.<a href="tqrect.html#moveTopLeft">moveTopLeft</a>( TQPoint( -br.<a href="tqrect.html#width">width</a>()/2, -br.<a href="tqrect.html#height">height</a>()/2 ) );
break;
case Image:
<a name="x1248"></a><a name="x1246"></a> r = TQRect(0, 0, pix.<a href="tqpixmap.html#width">width</a>()+1, pix.<a href="tqpixmap.html#height">height</a>()+1);
break;
case Picture:
// ### need TQPicture::boundingRect()
r = TQRect(0,0,1000,1000);
break;
}
r.<a href="tqrect.html#moveTopLeft">moveTopLeft</a>( TQPoint(-r.<a href="tqrect.html#width">width</a>()/2, -r.<a href="tqrect.html#height">height</a>()/2) );
<a name="x1253"></a> r.<a href="tqrect.html#moveBy">moveBy</a>( -1, -1 ); // add border for matrix round off
<a name="x1255"></a> r.<a href="tqrect.html#setSize">setSize</a>( TQSize( r.<a href="tqrect.html#width">width</a>() + 2,r.<a href="tqrect.html#height">height</a>() + 2 ) );
// compute union of new and old rect
// the resulting rectangle will cover what is already displayed
// and have room for the new text/pixmap
<a name="x1279"></a><a name="x1257"></a> eraseRect = eraseRect.<a href="tqrect.html#unite">unite</a>( mtx.<a href="tqwmatrix.html#mapRect">mapRect</a>(r) );
int pw = TQMIN(eraseRect.<a href="tqrect.html#width">width</a>(),width());
int ph = TQMIN(eraseRect.<a href="tqrect.html#height">height</a>(),height());
<a href="tqpixmap.html">TQPixmap</a> pm( pw, ph ); // off-screen drawing pixmap
<a name="x1245"></a> pm.<a href="tqpixmap.html#fill">fill</a>( <a href="tqwidget.html#backgroundColor">backgroundColor</a>() );
<a name="x1233"></a> p.<a href="tqpainter.html#begin">begin</a>( &amp;pm );
<a name="x1283"></a> um.<a href="tqwmatrix.html#translate">translate</a>( pw/2, ph/2 ); // 0,0 is center
um = mtx * um;
<a name="x1242"></a> p.<a href="tqpainter.html#setWorldMatrix">setWorldMatrix</a>( um );
switch ( mode() ) {
case Text:
<a name="x1240"></a> p.<a href="tqpainter.html#setFont">setFont</a>( <a href="tqwidget.html#font">font</a>() ); // use widget font
<a name="x1256"></a><a name="x1252"></a> p.<a href="tqpainter.html#drawText">drawText</a>( r.<a href="tqrect.html#left">left</a>() + textXPos, r.<a href="tqrect.html#top">top</a>() + textYPos, text );
#if 0
p.<a href="tqpainter.html#setPen">setPen</a>( red );
p.<a href="tqpainter.html#drawRect">drawRect</a>( br );
#endif
break;
case Image:
<a name="x1235"></a> p.<a href="tqpainter.html#drawPixmap">drawPixmap</a>( -pix.<a href="tqpixmap.html#width">width</a>()/2, -pix.<a href="tqpixmap.html#height">height</a>()/2, pix );
break;
case Picture:
// ### need TQPicture::boundingRect()
<a name="x1239"></a> p.<a href="tqpainter.html#scale">scale</a>(0.25,0.25);
<a name="x1243"></a> p.<a href="tqpainter.html#translate">translate</a>(-230,-180);
<a name="x1234"></a> p.<a href="tqpainter.html#drawPicture">drawPicture</a>( picture );
}
<a name="x1238"></a> p.<a href="tqpainter.html#end">end</a>();
int xpos = <a href="tqwidget.html#width">width</a>()/2 - pw/2;
int ypos = <a href="tqwidget.html#height">height</a>()/2 - ph/2;
<a href="tqimage.html#bitBlt">bitBlt</a>( this, xpos, ypos, // copy pixmap to widget
&amp;pm, 0, 0, -1, -1 );
<a name="x1278"></a> eraseRect = mtx.<a href="tqwmatrix.html#map">map</a>( r );
}
/*
Grand unifying widget, putting ShowXForm and XFormControl
together.
*/
class XFormCenter : public <a href="tqhbox.html">TQHBox</a>, public ModeNames
{
TQ_OBJECT
public:
XFormCenter( <a href="tqwidget.html">TQWidget</a> *parent=0, const char *name=0 );
public slots:
void setFont( const <a href="tqfont.html">TQFont</a> &amp;f ) { sx-&gt;<a href="tqwidget.html#setFont">setFont</a>( f ); }
void newMode( int );
private:
ShowXForm *sx;
XFormControl *xc;
};
void <a name="f395"></a>XFormCenter::newMode( int m )
{
static bool first_i = TRUE;
static bool first_p = TRUE;
if ( sx-&gt;mode() == m )
return;
if ( m == Image &amp;&amp; first_i ) {
first_i = FALSE;
<a href="tqpixmap.html">TQPixmap</a> pm;
<a name="x1247"></a> if ( pm.<a href="tqpixmap.html#load">load</a>( "image.any" ) )
sx-&gt;setPixmap( pm );
return;
}
if ( m == Picture &amp;&amp; first_p ) {
first_p = FALSE;
<a href="tqpicture.html">TQPicture</a> p;
<a name="x1244"></a> if (p.<a href="tqpicture.html#load">load</a>( "picture.any" ))
sx-&gt;setPicture( p );
return;
}
sx-&gt;setMode(m);
}
<a name="f396"></a>XFormCenter::XFormCenter( <a href="tqwidget.html">TQWidget</a> *parent, const char *name )
: <a href="tqhbox.html">TQHBox</a>( parent, name )
{
<a href="tqfont.html">TQFont</a> f( "Charter", 36, TQFont::Bold );
xc = new XFormControl( f, this );
sx = new ShowXForm( f, this );
<a href="tqhbox.html#setStretchFactor">setStretchFactor</a>(sx,1);
xc-&gt;<a href="tqframe.html#setFrameStyle">setFrameStyle</a>( TQFrame::Panel | TQFrame::Raised );
<a name="x1227"></a> xc-&gt;<a href="tqframe.html#setLineWidth">setLineWidth</a>( 2 );
<a href="tqobject.html#connect">connect</a>( xc, TQ_SIGNAL(newText(const <a href="tqstring.html">TQString</a>&amp;)), sx,
TQ_SLOT(setText(const <a href="tqstring.html">TQString</a>&amp;)) );
<a href="tqobject.html#connect">connect</a>( xc, TQ_SIGNAL(newMatrix(TQWMatrix)),
sx, TQ_SLOT(setMatrix(TQWMatrix)) );
<a href="tqobject.html#connect">connect</a>( xc, TQ_SIGNAL(newFont(const <a href="tqfont.html">TQFont</a>&amp;)), sx,
TQ_SLOT(<a href="tqwidget.html#setFont">setFont</a>(const <a href="tqfont.html">TQFont</a>&amp;)) );
<a href="tqobject.html#connect">connect</a>( xc, TQ_SIGNAL(newMode(int)), TQ_SLOT(newMode(int)) );
sx-&gt;setText( "Troll" );
newMode( Image );
sx-&gt;setMatrix(xc-&gt;matrix());
}
int main( int argc, char **argv )
{
<a href="ntqapplication.html">TQApplication</a> a( argc, argv );
XFormCenter *xfc = new XFormCenter;
a.<a href="ntqapplication.html#setMainWidget">setMainWidget</a>( xfc );
xfc-&gt;<a href="tqwidget.html#setCaption">setCaption</a>("TQt Example - XForm");
xfc-&gt;<a href="tqwidget.html#show">show</a>();
return a.<a href="ntqapplication.html#exec">exec</a>();
}
#include "xform.moc" // include metadata generated by the <a href="tqmoc.html#tqmoc">tqmoc</a>
</pre>
<p>See also <a href="examples.html">Examples</a>.
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<td align=right><div align=right>TQt 3.3.8</div>
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