ui/ui/graphics.h

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2017 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 UI_GRAPHICS_H
#define	UI_GRAPHICS_H

#include "toolkit.h"

#ifdef	__cplusplus
extern "C" {
#endif

typedef struct UiGraphics      UiGraphics;
typedef struct UiTextLayout    UiTextLayout;

typedef void(*ui_drawfunc)(UiEvent*, UiGraphics*, void*);

struct UiGraphics {
    int width;
    int height;
};

typedef struct UiDrawingAreaArgs {
    UiBool fill;
    UiBool hexpand;
    UiBool vexpand;
    UiBool hfill;
    UiBool vfill;
    UiBool override_defaults;
    int margin;
    int margin_left;
    int margin_right;
    int margin_top;
    int margin_bottom;
    int colspan;
    int rowspan;
    const char *name;
    const char *style_class;
    
    int width;
    int height;
    ui_drawfunc draw;
    void *drawdata;
    ui_callback onclick;
    void *onclickdata;
    ui_callback onmotion;
    void *onmotiondata;
} UiDrawingAreaArgs;

#define ui_drawingarea(obj, ...) ui_drawingarea_create(obj, &(UiDrawingAreaArgs) { __VA_ARGS__ } )

UIEXPORT UIWIDGET ui_drawingarea_create(UiObject *obj, UiDrawingAreaArgs *args);
UIEXPORT void ui_drawingarea_getsize(UIWIDGET drawingarea, int *width, int *height);
UIEXPORT void ui_drawingarea_redraw(UIWIDGET drawingarea);

// text layout
UIEXPORT UiTextLayout* ui_text(UiGraphics *g);
UIEXPORT void ui_text_free(UiTextLayout *text);
UIEXPORT void ui_text_setstring(UiTextLayout *layout, char *str);
UIEXPORT void ui_text_setstringl(UiTextLayout *layout, char *str, int len);
UIEXPORT void ui_text_setfont(UiTextLayout *layout, const char *font, int size);
UIEXPORT void ui_text_getsize(UiTextLayout *layout, int *width, int *height);
UIEXPORT void ui_text_setwidth(UiTextLayout *layout, int width);

// drawing functions
UIEXPORT void ui_graphics_color(UiGraphics *g, int red, int green, int blue);
UIEXPORT void ui_draw_line(UiGraphics *g, int x1, int y1, int x2, int y2);
UIEXPORT void ui_draw_rect(UiGraphics *g, int x, int y, int w, int h, UiBool fill);
UIEXPORT void ui_draw_text(UiGraphics *g, int x, int y, UiTextLayout *text);

#ifdef	__cplusplus
}
#endif

#endif	/* UI_GRAPHICS_H */