/*
 *  This file is part of RawTherapee.
 *
 *  Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
 *
 *  RawTherapee 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 3 of the License, or
 *  (at your option) any later version.
 *
 *  RawTherapee 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with RawTherapee.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef _PREVIEWWINDOW_
#define _PREVIEWWINDOW_

#include "cropwindow.h"
#include "cursormanager.h"
#include "guiutils.h"
#include "previewhandler.h"
#include <gtkmm.h>

class PreviewWindow: public Gtk::DrawingArea,
                     public PreviewListener,
                     public CropWindowListener {

private:
    Cairo::RefPtr<BackBuffer> backBuffer;
    PreviewHandler *previewHandler;
    sigc::connection rconn;
    CropWindow *mainCropWin;
    ImageArea *imageArea;
    int imgX, imgY, imgW, imgH;
    double zoom;
    double press_x, press_y;
    bool isMoving;
    bool needsUpdate;
    CursorShape cursor_type;

    void updatePreviewImage();
    void getObservedFrameArea(int &x, int &y, int &w, int &h);

public:
    PreviewWindow();

    void setPreviewHandler(PreviewHandler *ph);
    void setImageArea(ImageArea *ia);

    void on_realize() override;
    void on_resized(Gtk::Allocation &req);
    bool on_draw(const ::Cairo::RefPtr<Cairo::Context> &cr) override;
    bool on_motion_notify_event(GdkEventMotion *event) override;
    bool on_button_press_event(GdkEventButton *event) override;
    bool on_button_release_event(GdkEventButton *event) override;
    Gtk::SizeRequestMode get_request_mode_vfunc() const override;
    void get_preferred_height_vfunc(int &minimum_height,
                                    int &natural_height) const override;
    void get_preferred_width_vfunc(int &minimum_width,
                                   int &natural_width) const override;
    void
    get_preferred_height_for_width_vfunc(int width, int &minimum_height,
                                         int &natural_height) const override;
    void
    get_preferred_width_for_height_vfunc(int height, int &minimum_width,
                                         int &natural_width) const override;

    // PreviewListener interface
    void previewImageChanged() override;

    // CropWindowListener interface
    void cropPositionChanged(CropWindow *w) override;
    void cropWindowSizeChanged(CropWindow *w) override;
    void cropZoomChanged(CropWindow *w) override;
    void initialImageArrived() override;
};

#endif
