1 files changed, 101 insertions, 0 deletions
diff --git a/examples/hello/hello.cpp b/examples/hello/hello.cpp
new file mode 100644
index 000000000..55f8356e0
--- /dev/null
+++ b/examples/hello/hello.cpp
@@ -0,0 +1,101 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 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 "hello.h"
+#include <qpushbutton.h>
+#include <qtimer.h>
+#include <qpainter.h>
+#include <qpixmap.h>
+
+
+/*
+  Constructs a Hello widget. Starts a 40 ms animation timer.
+*/
+
+Hello::Hello( const char *text, TQWidget *parent, const char *name )
+    : TQWidget(parent,name), t(text), b(0)
+{
+    TQTimer *timer = new TQTimer(this);
+    connect( timer, SIGNAL(timeout()), SLOT(animate()) );
+    timer->start( 40 );
+
+    resize( 260, 130 );
+}
+
+
+/*
+  This private slot is called each time the timer fires.
+*/
+
+void Hello::animate()
+{
+    b = (b + 1) & 15;
+    repaint( FALSE );
+}
+
+
+/*
+  Handles mouse button release events for the Hello widget.
+
+  We emit the clicked() signal when the mouse is released inside
+  the widget.
+*/
+
+void Hello::mouseReleaseEvent( TQMouseEvent *e )
+{
+    if ( rect().contains( e->pos() ) )
+        emit clicked();
+}
+
+
+/*
+  Handles paint events for the Hello widget.
+
+  Flicker-free update. The text is first drawn in the pixmap and the
+  pixmap is then blt'ed to the screen.
+*/
+
+void Hello::paintEvent( TQPaintEvent * )
+{
+    static int sin_tbl[16] = {
+        0, 38, 71, 92, 100, 92, 71, 38,	0, -38, -71, -92, -100, -92, -71, -38};
+
+    if ( t.isEmpty() )
+        return;
+
+    // 1: Compute some sizes, positions etc.
+    TQFontMetrics fm = fontMetrics();
+    int w = fm.width(t) + 20;
+    int h = fm.height() * 2;
+    int pmx = width()/2 - w/2;
+    int pmy = height()/2 - h/2;
+
+    // 2: Create the pixmap and fill it with the widget's background
+    TQPixmap pm( w, h );
+    pm.fill( this, pmx, pmy );
+
+    // 3: Paint the pixmap. Cool wave effect
+    TQPainter p;
+    int x = 10;
+    int y = h/2 + fm.descent();
+    int i = 0;
+    p.begin( &pm );
+    p.setFont( font() );
+    while ( !t[i].isNull() ) {
+        int i16 = (b+i) & 15;
+        p.setPen( TQColor((15-i16)*16,255,255,TQColor::Hsv) );
+        p.drawText( x, y-sin_tbl[i16]*h/800, t.mid(i,1), 1 );
+        x += fm.width( t[i] );
+        i++;
+    }
+    p.end();
+
+    // 4: Copy the pixmap to the Hello widget
+    bitBlt( this, pmx, pmy, &pm );
+}