/* This is a small demo of the high-performance GUIX graphics framework. */

#include <stdio.h>
#include "gx_api.h"
#include "all_widgets_4bpp_resources.h"
#include "all_widgets_4bpp_specifications.h"


#define LINE_LENGTH 100
#define LINE_WINDOW_LINE_LENGTH 80
#define LINE_CENTER_X_OFFSET 150
#define LINE_CENTER_Y_OFFSET 150

GX_WINDOW *pLineWin = &line_screen.line_screen_line_window;
int        line_angle = 0;
int        line_width = 1;
GX_BOOL    rounded = GX_FALSE;
int        line_x1;
int        line_x2;
int        line_y1;
int        line_y2;
INT        line_pattern;


VOID calculate_line_ends(VOID)
{
    INT scaled_angle;
    INT x_dist;
    INT y_dist;

    INT x_center = pLineWin->gx_widget_size.gx_rectangle_left + LINE_CENTER_X_OFFSET;
    INT y_center = pLineWin->gx_widget_size.gx_rectangle_top + LINE_CENTER_Y_OFFSET;

    scaled_angle = GX_FIXED_VAL_MAKE(line_angle);
    x_dist = GX_FIXED_VAL_TO_INT(gx_utility_math_cos(scaled_angle) * LINE_WINDOW_LINE_LENGTH);
    y_dist = GX_FIXED_VAL_TO_INT(gx_utility_math_sin(scaled_angle) * LINE_WINDOW_LINE_LENGTH);

    line_x1 = x_center - x_dist;
    line_x2 = x_center + x_dist;
    line_y1 = y_center - y_dist;
    line_y2 = y_center + y_dist;
}

VOID update_width_prompt(VOID)
{
    GX_PROMPT *pp;
    static GX_CHAR width_val[10];
    GX_STRING string;

    gx_widget_find((GX_WINDOW *)&line_screen, ID_WIDTH_DISPLAY, 0, &pp);

    if (pp)
    {
        gx_utility_ltoa(line_width, width_val, 10);
        string.gx_string_ptr = width_val;
        string.gx_string_length = strnlen(width_val, sizeof(width_val));
        gx_prompt_text_set_ext(pp, &string);
    }
}

VOID update_line_angle_prompt(VOID)
{
    GX_PROMPT *pp;
    static GX_CHAR angle_val[10];
    GX_STRING string;

    gx_widget_find((GX_WINDOW *)&line_screen, ID_ANGLE_PROMPT, 0, &pp);

    if (pp)
    {
        gx_utility_ltoa(line_angle, angle_val, 10);
        string.gx_string_ptr = angle_val;
        string.gx_string_length = strnlen(angle_val, sizeof(angle_val));
        gx_prompt_text_set_ext(pp, &string);
    }
}

UINT line_screen_event_handler(GX_WINDOW *window, GX_EVENT *myevent)
{
    UINT status = 0;

    switch (myevent->gx_event_type)
    {
    case GX_SIGNAL(ID_LINE_WIDTH, GX_EVENT_SLIDER_VALUE):
        line_width = myevent->gx_event_payload.gx_event_longdata;
        update_width_prompt();
        gx_system_dirty_mark(pLineWin);
        break;

    case GX_SIGNAL(ID_LINE_ANGLE, GX_EVENT_SLIDER_VALUE):
        line_angle = myevent->gx_event_payload.gx_event_longdata;
        update_line_angle_prompt();
        calculate_line_ends();
        gx_system_dirty_mark(pLineWin);
        break;

    case GX_SIGNAL(ID_ROUNDED, GX_EVENT_TOGGLE_ON):
        rounded = GX_TRUE;
        gx_system_dirty_mark(pLineWin);
        break;

    case GX_SIGNAL(ID_ROUNDED, GX_EVENT_TOGGLE_OFF):
        rounded = GX_FALSE;
        gx_system_dirty_mark(pLineWin);
        break;

    case GX_SIGNAL(ID_PATTERN, GX_EVENT_TOGGLE_ON):
        line_pattern = 0x0f0f0f0f;
        gx_system_dirty_mark(pLineWin);
        break;

    case GX_SIGNAL(ID_PATTERN, GX_EVENT_TOGGLE_OFF):
        line_pattern = 0;
        gx_system_dirty_mark(pLineWin);
        break;

    default:
        status = next_button_handler(window, myevent);
        break;
    }
    return status;
}



VOID line_win_draw(GX_WINDOW *window)
{
    ULONG brush_style = 0;
    GX_BRUSH *brush = GX_NULL;

    gx_window_draw((GX_WINDOW*)window);

    if (rounded)
    {
        brush_style |= GX_BRUSH_ROUND;
    }

    gx_context_raw_brush_define(0xffffff, 0x555555, brush_style);
    gx_context_brush_width_set(line_width);
    gx_context_brush_get(&brush);
    if (brush)
    {
        brush->gx_brush_line_pattern = line_pattern;
        gx_context_brush_set(brush);
    }
    calculate_line_ends();
    gx_canvas_line_draw(line_x1, line_y1, line_x2, line_y2);
}