Add Qt3 development HEAD version

1 files changed, 507 insertions, 0 deletions

diff --git a/examples/xform/xform.cpp b/examples/xform/xform.cpp
new file mode 100644
index 0000000..dff8cb8
--- /dev/null
+++ b/examples/xform/xform.cpp
@@ -0,0 +1,507 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 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 <qapplication.h>
+
+#include <qdialog.h>
+#include <qlabel.h>
+#include <qlineedit.h>
+#include <qpushbutton.h>
+#include <qcheckbox.h>
+#include <qradiobutton.h>
+#include <qbuttongroup.h>
+#include <qlcdnumber.h>
+#include <qslider.h>
+#include <qmenubar.h>
+#include <qfontdialog.h>
+#include <qlayout.h>
+#include <qvbox.h>
+#include <qwidgetstack.h>
+
+#include <qpainter.h>
+#include <qpixmap.h>
+#include <qpicture.h>
+
+#include <stdlib.h>
+
+
+class ModeNames {
+public:
+    enum Mode { Text, Image, Picture };
+};
+
+
+class XFormControl : public QVBox, public ModeNames
+{
+    Q_OBJECT
+public:
+    XFormControl( const QFont &initialFont, QWidget *parent=0, const char *name=0 );
+   ~XFormControl() {}
+
+    QWMatrix matrix();
+
+signals:
+    void newMatrix( QWMatrix );
+    void newText( const QString& );
+    void newFont( const QFont & );
+    void newMode( int );
+private slots:
+    void newMtx();
+    void newTxt(const QString&);
+    void selectFont();
+    void fontSelected( const QFont & );
+    void changeMode(int);
+    void timerEvent(QTimerEvent*);
+private:
+    Mode mode;
+    QSlider	 *rotS;		       // Rotation angle scroll bar
+    QSlider	 *shearS;	       // Shear value scroll bar
+    QSlider	 *magS;		       // Magnification value scroll bar
+    QLCDNumber	 *rotLCD;	       // Rotation angle LCD display
+    QLCDNumber	 *shearLCD;	       // Shear value LCD display
+    QLCDNumber	 *magLCD;	       // Magnification value LCD display
+    QCheckBox	 *mirror;	       // Checkbox for mirror image on/of
+    QWidgetStack* optionals;
+    QLineEdit	 *textEd;	       // Inp[ut field for xForm text
+    QPushButton  *fpb;		       // Select font push button
+    QRadioButton *rb_txt;	       // Radio button for text
+    QRadioButton *rb_img;	       // Radio button for image
+    QRadioButton *rb_pic;	       // Radio button for picture
+    QFont currentFont;
+};
+
+/*
+  ShowXForm displays a text or a pixmap (QPixmap) using a coordinate
+  transformation matrix (QWMatrix)
+*/
+
+class ShowXForm : public QWidget, public ModeNames
+{
+    Q_OBJECT
+public:
+    ShowXForm( const QFont &f, QWidget *parent=0, const char *name=0 );
+   ~ShowXForm() {}
+    void showIt();			// (Re)displays text or pixmap
+
+    Mode mode() const { return m; }
+public slots:
+    void setText( const QString& );
+    void setMatrix( QWMatrix );
+    void setFont( const QFont &f );
+    void setPixmap( QPixmap );
+    void setPicture( const QPicture& );
+    void setMode( int );
+private:
+    QSizePolicy sizePolicy() const;
+    QSize sizeHint() const;
+    void paintEvent( QPaintEvent * );
+    void resizeEvent( QResizeEvent * );
+    QWMatrix  mtx;			// coordinate transform matrix
+    QString   text;			// text to be displayed
+    QPixmap   pix;			// pixmap to be displayed
+    QPicture  picture;			// text to be displayed
+    QRect     eraseRect;		// covers last displayed text/pixmap
+    Mode      m;
+};
+
+XFormControl::XFormControl( const QFont &initialFont,
+			    QWidget *parent, const char *name )
+	: QVBox( parent, name )
+{
+    setSpacing(6);
+    setMargin(6);
+    currentFont = initialFont;
+    mode = Image;
+
+    rotLCD	= new QLCDNumber( 4, this, "rotateLCD" );
+    rotS	= new QSlider( QSlider::Horizontal, this,
+				  "rotateSlider" );
+    shearLCD	= new QLCDNumber( 5,this, "shearLCD" );
+    shearS	= new QSlider( QSlider::Horizontal, this,
+				  "shearSlider" );
+    mirror	= new QCheckBox( this, "mirrorCheckBox" );
+    rb_txt = new QRadioButton( this, "text" );
+    rb_img = new QRadioButton( this, "image" );
+    rb_pic = new QRadioButton( this, "picture" );
+    optionals = new QWidgetStack(this);
+    QVBox* optionals_text = new QVBox(optionals);
+    optionals_text->setSpacing(6);
+    QVBox* optionals_other = new QVBox(optionals);
+    optionals_other->setSpacing(6);
+    optionals->addWidget(optionals_text,0);
+    optionals->addWidget(optionals_other,1);
+    fpb		= new QPushButton( optionals_text, "text" );
+    textEd	= new QLineEdit( optionals_text, "text" );
+    textEd->setFocus();
+
+    rotLCD->display( "  0'" );
+
+    rotS->setRange( -180, 180 );
+    rotS->setValue( 0 );
+    connect( rotS, SIGNAL(valueChanged(int)), SLOT(newMtx()) );
+
+    shearLCD->display( "0.00" );
+
+    shearS->setRange( -25, 25 );
+    shearS->setValue( 0 );
+    connect( shearS, SIGNAL(valueChanged(int)), SLOT(newMtx()) );
+
+    mirror->setText( tr("Mirror") );
+    connect( mirror, SIGNAL(clicked()), SLOT(newMtx()) );
+
+    QButtonGroup *bg = new QButtonGroup(this);
+    bg->hide();
+    bg->insert(rb_txt,0);
+    bg->insert(rb_img,1);
+    bg->insert(rb_pic,2);
+    rb_txt->setText( tr("Text") );
+    rb_img->setText( tr("Image") );
+    rb_img->setChecked(TRUE);
+    rb_pic->setText( tr("Picture") );
+    connect( bg, SIGNAL(clicked(int)), SLOT(changeMode(int)) );
+
+    fpb->setText( tr("Select font...") );
+    connect( fpb, SIGNAL(clicked()), SLOT(selectFont()) );
+
+    textEd->setText( "Troll" );
+    connect( textEd, SIGNAL(textChanged(const QString&)),
+		     SLOT(newTxt(const QString&)) );
+
+    magLCD = new QLCDNumber( 4,optionals_other, "magLCD" );
+    magLCD->display( "100" );
+    magS = new QSlider( QSlider::Horizontal, optionals_other,
+			   "magnifySlider" );
+    magS->setRange( 0, 800 );
+    connect( magS, SIGNAL(valueChanged(int)), SLOT(newMtx()) );
+    magS->setValue( 0 );
+    connect( magS, SIGNAL(valueChanged(int)), magLCD, SLOT(display(int)));
+
+    optionals_text->adjustSize();
+    optionals_other->adjustSize();
+    changeMode(Image);
+
+    startTimer(20); // start an initial animation
+}
+
+void XFormControl::timerEvent(QTimerEvent*)
+{
+    int v = magS->value();
+    v = (v+2)+v/10;
+    if ( v >= 200 ) {
+	v = 200;
+	killTimers();
+    }
+    magS->setValue(v);
+}
+
+
+
+/*
+    Called whenever the user has changed one of the matrix parameters
+    (i.e. rotate, shear or magnification)
+*/
+void XFormControl::newMtx()
+{
+    emit newMatrix( matrix() );
+}
+
+void XFormControl::newTxt(const QString& s)
+{
+    emit newText(s);
+    changeMode(Text);
+}
+
+/*
+    Calculates the matrix appropriate for the current controls,
+    and updates the displays.
+*/
+QWMatrix XFormControl::matrix()
+{
+    QWMatrix m;
+    if (mode != Text) {
+	double magVal = 1.0*magS->value()/100;
+	m.scale( magVal, magVal );
+    }
+    double shearVal = 1.0*shearS->value()/25;
+    m.shear( shearVal, shearVal );
+    m.rotate( rotS->value() );
+    if ( mirror->isChecked() ) {
+	m.scale( 1, -1 );
+	m.rotate( 180 );
+    }
+
+    QString tmp;
+    tmp.sprintf( "%1.2f", shearVal  );
+    if ( shearVal >= 0 )
+	tmp.insert( 0, " " );
+    shearLCD->display( tmp );
+
+    int rot = rotS->value();
+    if ( rot < 0 )
+	rot = rot + 360;
+    tmp.sprintf( "%3i'", rot );
+    rotLCD->display( tmp );
+    return m;
+}
+
+
+void XFormControl::selectFont()
+{
+    bool ok;
+    QFont f = QFontDialog::getFont( &ok, currentFont );
+    if ( ok ) {
+	currentFont = f;
+	fontSelected( f );
+    }
+}
+
+void XFormControl::fontSelected( const QFont &font )
+{
+    emit newFont( font );
+    changeMode(Text);
+}
+
+/*
+    Sets the mode - Text, Image, or Picture.
+*/
+
+void XFormControl::changeMode(int m)
+{
+    mode = (Mode)m;
+
+    emit newMode( m );
+    newMtx();
+    if ( mode == Text ) {
+	optionals->raiseWidget(0);
+	rb_txt->setChecked(TRUE);
+    } else {
+	optionals->raiseWidget(1);
+	if ( mode == Image )
+	    rb_img->setChecked(TRUE);
+	else
+	    rb_pic->setChecked(TRUE);
+    }
+    qApp->flushX();
+}
+
+ShowXForm::ShowXForm( const QFont &initialFont,
+		      QWidget *parent, const char *name )
+	: QWidget( parent, name, WResizeNoErase )
+{
+    setFont( initialFont );
+    setBackgroundColor( white );
+    m = Text;
+    eraseRect = QRect( 0, 0, 0, 0 );
+}
+
+QSizePolicy ShowXForm::sizePolicy() const
+{
+    return QSizePolicy( QSizePolicy::Expanding, QSizePolicy::Expanding );
+}
+
+QSize ShowXForm::sizeHint() const
+{
+    return QSize(400,400);
+}
+
+void ShowXForm::paintEvent( QPaintEvent * )
+{
+    showIt();
+}
+
+void ShowXForm::resizeEvent( QResizeEvent * )
+{
+    eraseRect = QRect( width()/2, height()/2, 0, 0 );
+    repaint(rect());
+}
+
+void ShowXForm::setText( const QString& s )
+{
+    text = s;
+    showIt();
+}
+
+void ShowXForm::setMatrix( QWMatrix w )
+{
+    mtx = w;
+    showIt();
+}
+
+void ShowXForm::setFont( const QFont &f )
+{
+    m = Text;
+    QWidget::setFont( f );
+}
+
+void ShowXForm::setPixmap( QPixmap pm )
+{
+    pix	 = pm;
+    m    = Image;
+    showIt();
+}
+
+void ShowXForm::setPicture( const QPicture& p )
+{
+    picture = p;
+    m = Picture;
+    showIt();
+}
+
+void ShowXForm::setMode( int mode )
+{
+    m = (Mode)mode;
+}
+
+void ShowXForm::showIt()
+{
+    QPainter p;
+    QRect r;	  // rectangle covering new text/pixmap in virtual coordinates
+    QWMatrix 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
+    QRect br;
+    QFontMetrics fm( fontMetrics() );	// get widget font metrics
+    switch ( mode() ) {
+      case Text:
+	br = fm.boundingRect( text );	// rectangle covering text
+	r  = br;
+	textYPos = -r.y();
+	textXPos = -r.x();
+	br.moveTopLeft( QPoint( -br.width()/2, -br.height()/2 ) );
+        break;
+      case Image:
+	r = QRect(0, 0, pix.width()+1, pix.height()+1);
+        break;
+      case Picture:
+	// ### need QPicture::boundingRect()
+	r = QRect(0,0,1000,1000);
+        break;
+    }
+    r.moveTopLeft( QPoint(-r.width()/2, -r.height()/2) );
+    r.moveBy( -1, -1 ); // add border for matrix round off
+    r.setSize( QSize( r.width() + 2,r.height() + 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
+    eraseRect = eraseRect.unite( mtx.mapRect(r) );
+    int pw = QMIN(eraseRect.width(),width());
+    int ph = QMIN(eraseRect.height(),height());
+    QPixmap pm( pw, ph );		// off-screen drawing pixmap
+    pm.fill( backgroundColor() );
+
+    p.begin( &pm );
+    um.translate( pw/2, ph/2 );	// 0,0 is center
+    um = mtx * um;
+    p.setWorldMatrix( um );
+    switch ( mode() ) {
+      case Text:
+	p.setFont( font() );		// use widget font
+	p.drawText( r.left() + textXPos, r.top() + textYPos, text );
+#if 0
+	p.setPen( red );
+	p.drawRect( br );
+#endif
+	break;
+    case Image:
+	p.drawPixmap( -pix.width()/2, -pix.height()/2, pix );
+	break;
+      case Picture:
+	// ### need QPicture::boundingRect()
+	p.scale(0.25,0.25);
+	p.translate(-230,-180);
+	p.drawPicture( picture );
+    }
+    p.end();
+
+    int xpos = width()/2  - pw/2;
+    int ypos = height()/2 - ph/2;
+    bitBlt( this, xpos, ypos,			// copy pixmap to widget
+	    &pm, 0, 0, -1, -1 );
+    eraseRect =	 mtx.map( r );
+}
+
+
+/*
+    Grand unifying widget, putting ShowXForm and XFormControl
+    together.
+*/
+
+class XFormCenter : public QHBox, public ModeNames
+{
+    Q_OBJECT
+public:
+    XFormCenter( QWidget *parent=0, const char *name=0 );
+public slots:
+    void setFont( const QFont &f ) { sx->setFont( f ); }
+    void newMode( int );
+private:
+    ShowXForm	*sx;
+    XFormControl *xc;
+};
+
+void XFormCenter::newMode( int m )
+{
+    static bool first_i = TRUE;
+    static bool first_p = TRUE;
+
+    if ( sx->mode() == m )
+	return;
+    if ( m == Image && first_i ) {
+	first_i = FALSE;
+	QPixmap pm;
+	if ( pm.load( "image.any" ) )
+	    sx->setPixmap( pm );
+	return;
+    }
+    if ( m == Picture && first_p ) {
+	first_p = FALSE;
+	QPicture p;
+	if (p.load( "picture.any" ))
+	    sx->setPicture( p );
+	return;
+    }
+    sx->setMode(m);
+}
+
+XFormCenter::XFormCenter( QWidget *parent, const char *name )
+    : QHBox( parent, name )
+{
+    QFont f( "Charter", 36, QFont::Bold );
+
+    xc = new XFormControl( f, this );
+    sx = new ShowXForm( f, this );
+    setStretchFactor(sx,1);
+    xc->setFrameStyle( QFrame::Panel | QFrame::Raised );
+    xc->setLineWidth( 2 );
+    connect( xc, SIGNAL(newText(const QString&)), sx,
+		 SLOT(setText(const QString&)) );
+    connect( xc, SIGNAL(newMatrix(QWMatrix)),
+	     sx, SLOT(setMatrix(QWMatrix)) );
+    connect( xc, SIGNAL(newFont(const QFont&)), sx,
+		 SLOT(setFont(const QFont&)) );
+    connect( xc, SIGNAL(newMode(int)), SLOT(newMode(int)) );
+    sx->setText( "Troll" );
+    newMode( Image );
+    sx->setMatrix(xc->matrix());
+}
+
+
+int main( int argc, char **argv )
+{
+    QApplication a( argc, argv );
+
+    XFormCenter *xfc = new XFormCenter;
+
+    a.setMainWidget( xfc );
+    xfc->setCaption("Qt Example - XForm");
+    xfc->show();
+    return a.exec();
+}
+
+#include "xform.moc"		      // include metadata generated by the moc