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/********************************************************************************
* *
* I m a g e V i e w W i d g e t *
* *
*********************************************************************************
* Copyright (C) 2000,2022 by Jeroen van der Zijp. All Rights Reserved. *
*********************************************************************************
* This library is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as published by *
* the Free Software Foundation; either version 3 of the License, or *
* (at your option) any later version. *
* *
* This library 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 Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/> *
********************************************************************************/
#ifndef FXIMAGEVIEW_H
#define FXIMAGEVIEW_H
#ifndef FXSCROLLAREA_H
#include "FXScrollArea.h"
#endif
namespace FX {
class FXImage;
/// Image alignment styles
enum {
IMAGEVIEW_NORMAL = 0, /// Normal mode is centered
IMAGEVIEW_CENTER_X = 0, /// Centered horizontally
IMAGEVIEW_LEFT = 0x00100000, /// Left-aligned
IMAGEVIEW_RIGHT = 0x00200000, /// Right-aligned
IMAGEVIEW_CENTER_Y = 0, /// Centered vertically
IMAGEVIEW_TOP = 0x00400000, /// Top-aligned
IMAGEVIEW_BOTTOM = 0x00800000 /// Bottom-aligned
};
/**
* The Image View widget display a scrollable view of an image.
*/
class FXAPI FXImageView : public FXScrollArea {
FXDECLARE(FXImageView)
protected:
FXImage *image; // Image to view
FXint grabx; // Grab point x
FXint graby; // Grab point y
protected:
FXImageView();
private:
FXImageView(const FXImageView&);
FXImageView &operator=(const FXImageView&);
public:
long onPaint(FXObject*,FXSelector,void*);
long onMotion(FXObject*,FXSelector,void*);
long onRightBtnPress(FXObject*,FXSelector,void*);
long onRightBtnRelease(FXObject*,FXSelector,void*);
public:
enum {
ID_XYZ=FXScrollArea::ID_LAST,
ID_LAST
};
public:
/// Construct a scroll window
FXImageView(FXComposite* p,FXImage* img=nullptr,FXObject* tgt=nullptr,FXSelector sel=0,FXuint opts=0,FXint x=0,FXint y=0,FXint w=0,FXint h=0);
/// Create server-side resources
virtual void create();
/// Detach server-side resources
virtual void detach();
/// Perform layout
virtual void layout();
/// Image view widget can receive focus
virtual FXbool canFocus() const;
/// Return the width of the contents
virtual FXint getContentWidth();
/// Return the height of the contents
virtual FXint getContentHeight();
/// Change image
void setImage(FXImage* img);
/// Return image
FXImage* getImage() const { return image; }
/// Set the current alignment.
void setAlignment(FXuint mode);
/// Get the current alignment.
FXuint getAlignment() const;
/// Save list to a stream
virtual void save(FXStream& store) const;
/// Load list from a stream
virtual void load(FXStream& store);
/// Destroy
virtual ~FXImageView();
};
}
#endif
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