GCSx-fork/include/gcsx_wpreview.h

/* GCSx
** WPREVIEW.H
**
** Widget that previews an image (tile, map, etc.)
*/

/*****************************************************************************
** Copyright (C) 2003-2006 Janson
**
** 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.
** 
** 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 General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
*****************************************************************************/

#ifndef __GCSx_WPREVIEW_H_
#define __GCSx_WPREVIEW_H_

// Shows a scaled (if needed) preview of an image
// Call load() when the image updates

class WPreview : public Widget {
private:
    enum {
        PREVIEW_BORDER_SIZE = 1,
    };

    SDL_Surface* const* source;
    SDL_Surface* scaled; // Scaled version, OR copy of src
    int scaledIsSource;
    
    int displayW;
    int displayH;
    int showMultiple;
    int allowDistort;
    int imageX;
    int imageY;
    int imageFullX; // If fullsize in X (safer than floating comparison to 1.0)
    int imageFullY;
    float imageScaleX;
    float imageScaleY;
    
    // Location of copy on white background; 0 if none
    int imageWhiteX;
    int imageWhiteY;
    
    // Location of tiled copy; 0 if none
    int imageTiledX;
    int imageTiledY; // (can be negative)
    int imageTiledQty;

public:
    // Width doesn't include border
    // A width or height <= 0 hides the control
    WPreview(int pId, SDL_Surface* const* src, int myWidth, int myHeight, int pShowMultiple, int pAllowDistort);
    ~WPreview();
    
    // Width doesn't include border
    // A width or height <= 0 hides the control
    // This won't rearrange the dialog, so it should be the last control
    // Call load() after this to update image/size/position
    void changeSize(int newWidth, int newHeight);

    int event(int hasFocus, const SDL_Event* event);
    int refuseAll() const;
    void load();
    void apply();
    void display(SDL_Surface* destSurface, Rect& toDisplay, const Rect& clipArea, int xOffset, int yOffset);
};

#endif