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60 lines
1.4 KiB
60 lines
1.4 KiB
14 years ago
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/****************************************************************************
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**
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** Implementation of a widget that draws a rubberband. Designed to be used
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** in an X11 overlay visual
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**
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** Copyright (C) 1999-2008 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for Qt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#include "rubberbandwidget.h"
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#include <qpainter.h>
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RubberbandWidget::RubberbandWidget( QColor transparentColor, QWidget *parent,
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const char *name, WFlags f )
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: QWidget( parent, name, f )
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{
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setBackgroundColor( transparentColor );
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on = FALSE;
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}
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void RubberbandWidget::mousePressEvent( QMouseEvent* e )
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{
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p1 = e->pos();
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p2 = p1;
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p3 = p1;
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on = TRUE;
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setMouseTracking( TRUE );
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}
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void RubberbandWidget::mouseMoveEvent( QMouseEvent* e )
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{
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if ( on ) {
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p2 = e->pos();
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QPainter p( this );
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// Erase last drawn rubberband:
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p.setPen( QPen( backgroundColor(), 3 ) );
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p.drawRect( QRect( p1, p3 ) );
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// Draw the new one:
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p.setPen( QPen( white, 3 ) );
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p.drawRect( QRect(p1, p2) );
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p3 = p2;
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}
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}
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void RubberbandWidget::mouseReleaseEvent( QMouseEvent* )
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{
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if ( on ) {
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QPainter p ( this );
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p.eraseRect( rect() );
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}
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on = FALSE;
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setMouseTracking( FALSE );
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}
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