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hugin1/hugin/PreviewTool.h

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// -*- c-basic-offset: 4 -*-

#ifndef _PREVIEWTOOL_H
#define _PREVIEWTOOL_H

#include "hugin_utils/utils.h"
#include <wx/event.h>

#include "PreviewToolHelper.h"

/* PreviewTool is an abstract base class for the interactive tools that work
 * with the OpenGL accelerated preview. They can respond to the users actions
 * over the preview, or changes in the panorama, and can draw extras above,
 * below, or instead of the panorama images.
 *
 * The *Event functions are only called when the Tool requested a notification.
 * Tools may do this through an instance of the PreviewToolHelper class which
 * is passed by pointer on construction. When a tool is decativated, all the
 * notifications it monitors are removed.
 */
class PreviewTool
{
public:
    PreviewTool(PreviewToolHelper *helper);
    
    virtual ~PreviewTool();
    // Lots of stub functions here. Your tools should override a few of them.
    
    virtual void Activate() = 0;
    
    virtual void MouseMoveEvent(double x, double y, wxMouseEvent & e) {}
    virtual void MouseButtonEvent(wxMouseEvent &e) {}
    virtual void ImagesUnderMouseChangedEvent() {}
    virtual void KeypressEvent(int keycode, int modifiers, bool pressed) {}
    virtual void BeforeDrawImagesEvent() {}
    virtual void AfterDrawImagesEvent() {}
    virtual void ReallyAfterDrawImagesEvent() {}
    virtual bool BeforeDrawImageEvent(unsigned int image) {return true;}
    virtual void AfterDrawImageEvent(unsigned int image) {}
protected:
    PreviewToolHelper *helper;
};

#endif

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