/*
 * Kangaroo Punch Multi Player Game Server Mark II
 * Copyright (C) 2020-2021  Scott Duensing
 *
 * 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 3 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, see <https://www.gnu.org/licenses/>.
 *
 */


#ifndef GUI_H
#define GUI_H


#include "os.h"
#include "vesa.h"
#include "array.h"
#include "mouse.h"
#include "font.h"


#define GUI_GET_FLAG(w,f)   ((w)->flags & (1 << (f)))
#define GUI_SET_FLAG(w,f)   (w)->flags |= (1 << (f))
#define GUI_CLEAR_FLAG(w,f) (w)->flags &= (~(1 << (f)))

#define W(w)  ((WidgetT *)w)


// Widget Magics
enum MagicE {
	MAGIC_UNKNOWN = 0,
	MAGIC_DESKTOP,
	MAGIC_WINDOW,
	MAGIC_BUTTON,
	MAGIC_COUNT
};

// Widget Metrics
enum MetricE {
	METRIC_BUTTON_BEZEL_SIZE = 0,
	METRIC_BUTTON_HORIZONTAL_MARGIN,
	METRIC_BUTTON_VERTICAL_MARGIN,
	METRIC_WINDOW_BORDER_WIDTH,
	METRIC_WINDOW_TITLE_HEIGHT,
	METRIC_WINDOW_TITLE_GRAB_HEIGHT,
	METRIC_COUNT
};

// Widget Colors
enum ColorE {
	COLOR_BUTTON_BACKGROUND = 0,
	COLOR_BUTTON_HIGHLIGHT,
	COLOR_BUTTON_SHADOW,
	COLOR_BUTTON_TEXT,
	COLOR_DESKTOP,
	COLOR_WINDOW_BACKGROUND,
	COLOR_WINDOW_HIGHLIGHT,
	COLOR_WINDOW_SHADOW,
	COLOR_WINDOW_TITLE_ACTIVE,
	COLOR_WINDOW_TITLE_INACTIVE,
	COLOR_WINDOW_TITLE_TEXT_ACTIVE,
	COLOR_WINDOW_TITLE_TEXT_INACTIVE,
	COLOR_COUNT
};

// Mouse Events
enum MouseE {
	MOUSE_EVENT_NONE = 0,
	MOUSE_EVENT_IN,
	MOUSE_EVENT_OUT,
	MOUSE_EVENT_LEFT_DOWN,
	MOUSE_EVENT_LEFT_HOLD,
	MOUSE_EVENT_LEFT_UP
};


typedef struct DesktopS DesktopT;
typedef struct WidgetS  WidgetT;
typedef struct WindowS  WindowT;


extern int16_t   _guiMetric[METRIC_COUNT];
extern PixelT    _guiColor[COLOR_COUNT];
extern FontT    *_guiFont;
extern WidgetT  *_guiDragWidget;
extern uint16_t  _guiDragOffsetX;
extern uint16_t  _guiDragOffsetY;
extern WindowT  *_guiActiveWindow;


void      guiAttach(WidgetT *parent, WidgetT *child);
void      guiComposite(void);
void      guiDelete(WidgetT **widget);
void      guiDrawHighlightFrame(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, PixelT upperLeft, PixelT lowerRight);
void      guiDrawLine(int16_t x1, int16_t y1, int16_t x2, int16_t y2, PixelT pixel);
void      guiDrawFilledRectangle(int16_t x1, int16_t y1, int16_t x2, int16_t y2, PixelT pixel);
void      guiMousePositionOnWidgetGet(WidgetT *widget, MouseT *mouse, uint16_t *x, uint16_t *y);
void      guiPaint(WidgetT *widget);
void      guiProcessMouse(MouseT *mouse);
WidgetT  *guiRootGet(void);
void      guiSetWidgetAndChildrenDirty(WidgetT *widget);
DesktopT *guiStartup(void);
void      guiShutdown(void);
void     *guiUserDataGet(WidgetT *widget);
void      guiUserDataSet(WidgetT *widget, void *userData);
void      guiWidgetPositionOnScreenGet(WidgetT *widget, uint16_t *x, uint16_t *y);


#endif // GUI_H