glimpse_viewer.h

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#ifndef __GLIMPSE_VIEWER_H__
#define __GLIMPSE_VIEWER_H__
 
#include <chitralekha.h>
#include <widgets/base.h>
#include <widgets/window.h>
#include "glimpse_image.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
typedef void (*GlimpseBackCallback)(void* user_data);
 
typedef struct {
    ChWidget wid;
 
    char current_path[256];
    char current_filename[64];
    GlimpseRawImage current_img;
    GlimpseRawImage scaled_img;
    int scaled_x;
    int scaled_y;
    bool has_image;
 
    // Zoom & Pan state
    int base_fit_w;
    int base_fit_h;
    int zoom_percent;
    int pan_x;
    int pan_y;
 
    // Dragging state
    bool is_dragging;
    int drag_last_x;
    int drag_last_y;
 
    // Back button geometry (relative to window)
    int btn_x;
    int btn_y;
    int btn_w;
    int btn_h;
    bool btn_hover;
    bool btn_clicked;
 
    // Zoom Out button [-]
    int btn_zoom_out_x;
    int btn_zoom_out_y;
    int btn_zoom_out_w;
    int btn_zoom_out_h;
    bool btn_zoom_out_hover;
    bool btn_zoom_out_clicked;
 
    // Zoom In button [+]
    int btn_zoom_in_x;
    int btn_zoom_in_y;
    int btn_zoom_in_w;
    int btn_zoom_in_h;
    bool btn_zoom_in_hover;
    bool btn_zoom_in_clicked;
 
    // Fit / Reset button [Fit]
    int btn_fit_x;
    int btn_fit_y;
    int btn_fit_w;
    int btn_fit_h;
    bool btn_fit_hover;
    bool btn_fit_clicked;
 
    int lbl_zoom_x;
 
    GlimpseBackCallback on_back;
    void* user_data;
} GlimpseViewer;
 
GlimpseViewer* GlimpseViewerCreate(int x, int y, int w, int h, GlimpseBackCallback on_back, void* user_data);
 
bool GlimpseViewerLoad(GlimpseViewer* viewer, const char* path);
 
void GlimpseViewerUnload(GlimpseViewer* viewer);
 
void GlimpseViewerResetFit(GlimpseViewer* viewer);
 
void GlimpseViewerZoomIn(GlimpseViewer* viewer);
 
void GlimpseViewerZoomOut(GlimpseViewer* viewer);
 
void GlimpseViewerPaint(ChWidget* wid, ChWindow* win);
 
void GlimpseViewerMouse(ChWidget* wid, ChWindow* win, int x, int y, int button);
 
#ifdef __cplusplus
}
#endif
 
#endif // __GLIMPSE_VIEWER_H__