ui/gtk/image.h

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2024 Olaf Wintermann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef IMAGE_H
#define IMAGE_H

#include "../ui/image.h"
#include "toolkit.h"

#ifdef __cplusplus
extern "C" {
#endif

typedef struct UiImageViewer {
    GtkWidget *widget;
    UiVar *var;
    int padding_left;
    int padding_right;
    int padding_top;
    int padding_bottom;
    UiBool autoscale;
    UiBool adjustsize;
    UiBool useradjustable;
    GdkPixbuf *pixbuf;
    
    int zoom_scale;    
    int transx;
    int transy;
    int begin_transx;
    int begin_transy;
    int zoom;
    double prev_scale;
} UiImageViewer;

void ui_cairo_draw_image(UiImageViewer *imgviewer, cairo_t *cr, int width, int height);

void* ui_imageviewer_get(UiGeneric *g);
const char* ui_imageviewer_get_type(UiGeneric *g);
int ui_imageviewer_set(UiGeneric *g, void *value, const char *type);

#if GTK_MAJOR_VERSION >= 4

gboolean ui_imageviewer_scroll(
        GtkEventControllerScroll *widget,
        gdouble dx,
        gdouble dy,
        gpointer userdata);

void ui_imageviewer_drag_begin_cb(
        GtkGestureDrag* self,
        gdouble start_x,
        gdouble start_y,
        gpointer userdata);

void ui_imageviewer_drag_end_cb(
        GtkGestureDrag* self,
        gdouble x,
        gdouble y,
        gpointer userdata);

void ui_imageviewer_drag_update_cb(
        GtkGestureDrag* self,
        gdouble x,
        gdouble y,
        gpointer userdata);

#else

gboolean ui_imageviewer_scroll_event(
        GtkWidget *widget,
        GdkEventScroll event,
        gpointer userdata);

gboolean ui_imageviewer_button_press_event(
        GtkWidget *widget,
        GdkEventButton event,
        gpointer userdata);

gboolean ui_imageviewer_button_release_event(
        GtkWidget *widget,
        GdkEventButton event,
        gpointer userdata);

#endif

#ifdef __cplusplus
}
#endif

#endif /* IMAGE_H */