4 files changed, 164 insertions, 0 deletions
diff --git a/examples/drawlines/README b/examples/drawlines/README
new file mode 100644
index 000000000..2a7c577c6
--- /dev/null
+++ b/examples/drawlines/README
@@ -0,0 +1,3 @@
+The connect program connects points with lines.  Drag the mouse
+inside the widget and release it.  It was inspired by an example in a
+Windows book.
diff --git a/examples/drawlines/connect.cpp b/examples/drawlines/connect.cpp
new file mode 100644
index 000000000..cfd785ba7
--- /dev/null
+++ b/examples/drawlines/connect.cpp
@@ -0,0 +1,132 @@
+/****************************************************************************
+**
+** 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 <qwidget.h>
+#include <qpainter.h>
+#include <qapplication.h>
+#include <stdlib.h>
+
+
+const int MAXPOINTS = 2000;			// maximum number of points
+const int MAXCOLORS = 40;
+
+
+//
+// ConnectWidget - draws connected lines
+//
+
+class ConnectWidget : public TQWidget
+{
+public:
+    ConnectWidget( TQWidget *parent=0, const char *name=0 );
+   ~ConnectWidget();
+protected:
+    void	paintEvent( TQPaintEvent * );
+    void	mousePressEvent( TQMouseEvent *);
+    void	mouseReleaseEvent( TQMouseEvent *);
+    void	mouseMoveEvent( TQMouseEvent *);
+private:
+    TQPoint     *points;				// point array
+    TQColor     *colors;				// color array
+    int		count;				// count = number of points
+    bool	down;				// TRUE if mouse down
+};
+
+
+//
+// Constructs a ConnectWidget.
+//
+
+ConnectWidget::ConnectWidget( TQWidget *parent, const char *name )
+    : TQWidget( parent, name, WStaticContents )
+{
+    setBackgroundColor( white );		// white background
+    count = 0;
+    down = FALSE;
+    points = new TQPoint[MAXPOINTS];
+    colors = new TQColor[MAXCOLORS];
+    for ( int i=0; i<MAXCOLORS; i++ )		// init color array
+	colors[i] = TQColor( rand()&255, rand()&255, rand()&255 );
+}
+
+ConnectWidget::~ConnectWidget()
+{
+    delete[] points;				// cleanup
+    delete[] colors;
+}
+
+
+//
+// Handles paint events for the connect widget.
+//
+
+void ConnectWidget::paintEvent( TQPaintEvent * )
+{
+    TQPainter paint( this );
+    for ( int i=0; i<count-1; i++ ) {		// connect all points
+	for ( int j=i+1; j<count; j++ ) {
+	    paint.setPen( colors[rand()%MAXCOLORS] ); // set random pen color
+	    paint.drawLine( points[i], points[j] ); // draw line
+	}
+    }
+}
+
+
+//
+// Handles mouse press events for the connect widget.
+//
+
+void ConnectWidget::mousePressEvent( TQMouseEvent * )
+{
+    down = TRUE;
+    count = 0;					// start recording points
+    erase();					// erase widget contents
+}
+
+
+//
+// Handles mouse release events for the connect widget.
+//
+
+void ConnectWidget::mouseReleaseEvent( TQMouseEvent * )
+{
+    down = FALSE;				// done recording points
+    update();					// draw the lines
+}
+
+
+//
+// Handles mouse move events for the connect widget.
+//
+
+void ConnectWidget::mouseMoveEvent( TQMouseEvent *e )
+{
+    if ( down && count < MAXPOINTS ) {
+	TQPainter paint( this );
+	points[count++] = e->pos();		// add point
+	paint.drawPoint( e->pos() );		// plot point
+    }
+}
+
+
+//
+// Create and display a ConnectWidget.
+//
+
+int main( int argc, char **argv )
+{
+    TQApplication a( argc, argv );
+    ConnectWidget connect;
+#ifndef QT_NO_WIDGET_TOPEXTRA   // for TQt/Embedded minimal build
+    connect.setCaption( "TQt Example - Draw lines");
+#endif
+    a.setMainWidget( &connect );
+    connect.show();
+    return a.exec();
+}
diff --git a/examples/drawlines/drawlines.doc b/examples/drawlines/drawlines.doc
new file mode 100644
index 000000000..f0abeec3b
--- /dev/null
+++ b/examples/drawlines/drawlines.doc
@@ -0,0 +1,20 @@
+
+/*
+*/
+/*!   \page drawlines-example.html
+
+  \ingroup examples
+  \title Connect the Points
+
+  This example shows very simple mouse-based user interaction and
+  painting without any world transform matrix or other advanced
+  features.  Run the program, click the button, move the mouse,
+  release the button, and watch the lines get drawn.
+
+  <hr>
+
+  Implementation:
+
+  \include drawlines/connect.cpp
+*/
+
diff --git a/examples/drawlines/drawlines.pro b/examples/drawlines/drawlines.pro
new file mode 100644
index 000000000..7c4eeb8c1
--- /dev/null
+++ b/examples/drawlines/drawlines.pro
@@ -0,0 +1,9 @@
+TEMPLATE	= app
+TARGET		= drawlines
+
+CONFIG		+= qt warn_on release
+DEPENDPATH 	= ../../include
+
+
+HEADERS		=
+SOURCES		= connect.cpp