GUIPerspectiveChanger.cpp

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/****************************************************************************/
// A class that allows to steer the visual output in dependence to user
/****************************************************************************/
// SUMO, Simulation of Urban MObility; see http://sumo.sourceforge.net/
// Copyright (C) 2001-2011 DLR (http://www.dlr.de/) and contributors
/****************************************************************************/
//
//   This program is free software; you can redistribute it and/or modify
//   it under the terms of the GNU General Public License as published by
//   the Free Software Foundation; either version 2 of the License, or
//   (at your option) any later version.
//
/****************************************************************************/


// ===========================================================================
// included modules
// ===========================================================================
#ifdef _MSC_VER
#include <windows_config.h>
#else
#include <config.h>
#endif

#include "GUISUMOAbstractView.h"
#include "GUIPerspectiveChanger.h"

#ifdef CHECK_MEMORY_LEAKS
#include <foreign/nvwa/debug_new.h>
#endif // CHECK_MEMORY_LEAKS


// ===========================================================================
// method definitions
// ===========================================================================
GUIPerspectiveChanger::GUIPerspectiveChanger(
    GUISUMOAbstractView& callBack,
    const Boundary& viewPort) :
    myCallback(callBack),
    myViewPort(viewPort) {}


GUIPerspectiveChanger::~GUIPerspectiveChanger() {}


void
GUIPerspectiveChanger::onLeftBtnPress(void*) {}


bool
GUIPerspectiveChanger::onLeftBtnRelease(void*) {
    return false;
}


void
GUIPerspectiveChanger::onRightBtnPress(void*) {}


bool
GUIPerspectiveChanger::onRightBtnRelease(void*) {
    return false;
}


void
GUIPerspectiveChanger::onMouseWheel(void*) {}


void
GUIPerspectiveChanger::onMouseMove(void*) {}


FXint
GUIPerspectiveChanger::getMouseXPosition() const {
    return myMouseXPosition;
}


FXint
GUIPerspectiveChanger::getMouseYPosition() const {
    return myMouseYPosition;
}


Boundary
GUIPerspectiveChanger::patchedViewPort() {
    // avoid division by zero
    if (myCallback.getHeight() == 0 ||
            myCallback.getWidth() == 0 ||
            myViewPort.getHeight() == 0 ||
            myViewPort.getWidth() == 0) {
        return myViewPort;
    }
    Boundary result = myViewPort;
    SUMOReal canvasRatio = (SUMOReal)myCallback.getWidth() / myCallback.getHeight();
    SUMOReal ratio = result.getWidth() / result.getHeight();
    if (ratio < canvasRatio) {
        result.growWidth(result.getWidth() *(canvasRatio / ratio - 1) / 2);
    } else {
        result.growHeight(result.getHeight() *(ratio / canvasRatio - 1) / 2);
    }
    return result;
}

/****************************************************************************/