scaled_image_widget.cpp
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00001 /*
00002  * Copyright (c) 2012, Willow Garage, Inc.
00003  * All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions are met:
00007  *
00008  *     * Redistributions of source code must retain the above copyright
00009  *       notice, this list of conditions and the following disclaimer.
00010  *     * Redistributions in binary form must reproduce the above copyright
00011  *       notice, this list of conditions and the following disclaimer in the
00012  *       documentation and/or other materials provided with the distribution.
00013  *     * Neither the name of the Willow Garage, Inc. nor the names of its
00014  *       contributors may be used to endorse or promote products derived from
00015  *       this software without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00018  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00019  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00020  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
00021  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
00022  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
00023  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00024  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
00025  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
00026  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
00027  * POSSIBILITY OF SUCH DAMAGE.
00028  */
00029 
00030 #include <QWidget>
00031 #include <QPainter>
00032 
00033 #include "scaled_image_widget.h"
00034 
00035 namespace rviz
00036 {
00037 
00038 ScaledImageWidget::ScaledImageWidget( float scale, QWidget* parent )
00039   : QWidget( parent )
00040   , scale_( scale )
00041 {
00042 }
00043 
00044 void ScaledImageWidget::setImage( QPixmap image )
00045 {
00046   image_ = image;
00047   update();
00048 }
00049 
00050 QSize ScaledImageWidget::sizeHint() const
00051 {
00052   return image_.size() * scale_;
00053 }
00054 
00055 void ScaledImageWidget::paintEvent( QPaintEvent* event )
00056 {
00057   if( !image_.isNull() )
00058   {
00059     QSize dest_size = image_.size();
00060     dest_size.scale( width(), height(), Qt::KeepAspectRatio );
00061     QRect dest_rect( width() / 2 - dest_size.width() / 2,
00062                      height() / 2 - dest_size.height() / 2,
00063                      dest_size.width(),
00064                      dest_size.height() );
00065 
00066     QPainter painter( this );
00067     painter.drawPixmap( dest_rect, image_ );
00068   }
00069 }
00070 
00071 } // end namespace rviz


rviz
Author(s): Dave Hershberger, Josh Faust
autogenerated on Mon Jan 6 2014 11:54:32