wx_rviz_logo_panel.cpp

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/****************************************************************
 *
 * Copyright (c) 2010
 *
 * Fraunhofer Institute for Manufacturing Engineering
 * and Automation (IPA)
 *
 * +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 *
 * Project name: care-o-bot
 * ROS stack name: cob_3d_environment_perception_intern
 * ROS package name: cob_3d_mapping_demonstrator
 * Description: Feature Map for storing and handling geometric features
 *
 * +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 *
 * Author: Georg Arbeiter, email:georg.arbeiter@ipa.fhg.de
 * Supervised by: Georg Arbeiter, email:georg.arbeiter@ipa.fhg.de
 *
 * Date of creation: 04/2012
 * ToDo:
 *
 *
 *
 * +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Fraunhofer Institute for Manufacturing
 *       Engineering and Automation (IPA) nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License LGPL as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License LGPL for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License LGPL along with this program.
 * If not, see <http://www.gnu.org/licenses/>.
 *
 ****************************************************************/
#include "cob_3d_mapping_demonstrator/wx_rviz_logo_panel.h"

BEGIN_EVENT_TABLE(wxImagePanel, wxPanel)
// some useful events
/*
 EVT_MOTION(wxImagePanel::mouseMoved)
 EVT_LEFT_DOWN(wxImagePanel::mouseDown)
 EVT_LEFT_UP(wxImagePanel::mouseReleased)
 EVT_RIGHT_DOWN(wxImagePanel::rightClick)
 EVT_LEAVE_WINDOW(wxImagePanel::mouseLeftWindow)
 EVT_KEY_DOWN(wxImagePanel::keyPressed)
 EVT_KEY_UP(wxImagePanel::keyReleased)
 EVT_MOUSEWHEEL(wxImagePanel::mouseWheelMoved)
 */

// catch paint events
EVT_PAINT(wxImagePanel::paintEvent)
//Size event
EVT_SIZE(wxImagePanel::OnSize)
END_EVENT_TABLE()


// some useful events
/*
 void wxImagePanel::mouseMoved(wxMouseEvent& event) {}
 void wxImagePanel::mouseDown(wxMouseEvent& event) {}
 void wxImagePanel::mouseWheelMoved(wxMouseEvent& event) {}
 void wxImagePanel::mouseReleased(wxMouseEvent& event) {}
 void wxImagePanel::rightClick(wxMouseEvent& event) {}
 void wxImagePanel::mouseLeftWindow(wxMouseEvent& event) {}
 void wxImagePanel::keyPressed(wxKeyEvent& event) {}
 void wxImagePanel::keyReleased(wxKeyEvent& event) {}
 */

wxImagePanel::wxImagePanel(wxWindow* parent, wxString file, wxBitmapType format) :
wxPanel(parent)
{
    // load the file... ideally add a check to see if loading was successful
    image.LoadFile(file, format);
    w = -1;
    h = -1;
}

/*
 * Called by the system of by wxWidgets when the panel needs
 * to be redrawn. You can also trigger this call by
 * calling Refresh()/Update().
 */

void wxImagePanel::paintEvent(wxPaintEvent & evt)
{
    // depending on your system you may need to look at double-buffered dcs
    wxPaintDC dc(this);
    render(dc);
}

/*
 * Alternatively, you can use a clientDC to paint on the panel
 * at any time. Using this generally does not free you from
 * catching paint events, since it is possible that e.g. the window
 * manager throws away your drawing when the window comes to the
 * background, and expects you will redraw it when the window comes
 * back (by sending a paint event).
 */
void wxImagePanel::paintNow()
{
    // depending on your system you may need to look at double-buffered dcs
    wxClientDC dc(this);
    render(dc);
}

/*
 * Here we do the actual rendering. I put it in a separate
 * method so that it can work no matter what type of DC
 * (e.g. wxPaintDC or wxClientDC) is used.
 */
void wxImagePanel::render(wxDC&  dc)
{
    int neww, newh;
    dc.GetSize( &neww, &newh );

    if( neww != w || newh != h )
    {
        resized = wxBitmap( image.Scale( neww, newh /*, wxIMAGE_QUALITY_HIGH*/ ) );
        w = neww;
        h = newh;
        dc.DrawBitmap( resized, 0, 0, false );
    }else{
        dc.DrawBitmap( resized, 0, 0, false );
    }
}

/*
 * Here we call refresh to tell the panel to draw itself again.
 * So when the user resizes the image panel the image should be resized too.
 */
void wxImagePanel::OnSize(wxSizeEvent& event){
    Refresh();
    //skip the event.
    event.Skip();
}