GUIDanielPerspectiveChanger.h

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// A class that allows to steer the visual output in dependence to
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// SUMO, Simulation of Urban MObility; see http://sumo.sourceforge.net/
// Copyright (C) 2001-2011 DLR (http://www.dlr.de/) and contributors
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//
//   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.
//
/****************************************************************************/
#ifndef GUIDanielPerspectiveChanger_h
#define GUIDanielPerspectiveChanger_h


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

#include <utils/geom/Position.h>
#include "GUIPerspectiveChanger.h"


// ===========================================================================
// class declarations
// ===========================================================================
class Boundary;


// ===========================================================================
// class definitions
// ===========================================================================
class GUIDanielPerspectiveChanger : public GUIPerspectiveChanger {
public:
    /* Constructor
     * @param[in] callBack The view to be udpated upon changes
     */
    GUIDanielPerspectiveChanger(GUISUMOAbstractView& callBack, const Boundary& viewPort);

    ~GUIDanielPerspectiveChanger();

    void onLeftBtnPress(void* data);
    bool onLeftBtnRelease(void* data);
    void onRightBtnPress(void* data);
    bool onRightBtnRelease(void* data);
    void onMouseWheel(void* data);
    void onMouseMove(void* data);

    virtual SUMOReal getRotation() const;

    virtual SUMOReal getXPos() const;

    virtual SUMOReal getYPos() const;

    virtual SUMOReal getZoom() const;

    void centerTo(const Position& pos, SUMOReal radius, bool applyZoom=true);

    void setViewport(SUMOReal zoom, SUMOReal xPos, SUMOReal yPos);


    /* @brief Adapts the viewport so that a change in canvass size keeps most of the
     * view intact (by showing more / less instead of zooming)
     * The canvass is clipped/enlarged on the left side of the screen
     *
     * @param[in] change The horizontal change in canvas size in pixels
     */
    void changeCanvassLeft(int change);

    /* @brief avoid unwanted flicker
     * @param[in] delay The minimum time delay in nanoseconds after
     *   mouseDown after which mouse-movements should be interpreted as zoom/drag
     */
    void setDragDelay(FXTime delay) {
        myDragDelay = delay;
    }

private:
    /* Performs the view movement
     * @param[in] xdiff the change to myViewCenter in pixel
     * @param[in] ydiff the change to myViewCenter in pixel
     */
    void move(int xdiff, int ydiff);

    void zoom(SUMOReal factor);

    void rotate(int diff);

private:
    SUMOReal myOrigWidth, myOrigHeight;

    SUMOReal myRotation;

    int myMouseButtonState;

    bool myMoveOnClick;

    Position myZoomBase;

    FXTime myDragDelay;
    FXTime myMouseDownTime;
};


#endif

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