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#include "GUI.h"

/*******************************************************************************
 * 全局变量
 ******************************************************************************/
/* 起始坐标 */
#define X_START 60
#define Y_START 5
typedef struct {
    int NumBars;

    GUI_COLOR Color;
    const char * s;
} BAR_DATA;

static const BAR_DATA _aBarData[] = {
    { 2, GUI_RED    , "Red" },
    { 2, GUI_GREEN  , "Green" },
    { 2, GUI_BLUE   , "Blue" },
    { 1, GUI_WHITE  , "Grey" },
    { 2, GUI_YELLOW , "Yellow" },
    { 2, GUI_CYAN   , "Cyan" },
    { 2, GUI_MAGENTA, "Magenta" },
};

static const GUI_COLOR _aColorStart[] = { GUI_BLACK, GUI_WHITE };
/*******************************************************************************
 * 函数
 ******************************************************************************/
/**
  * @brief 色条显示函数
  * @note 无
  * @param 无
  * @retval 无
  */
static void _DemoShowColorBar(void)
{
    GUI_RECT Rect;
    int      yStep;
    int      i;
    int      j;
    int      xSize;
    int      ySize;
    int      NumBars;
    int      NumColors;

    xSize = LCD_GetXSize();
    ySize = LCD_GetYSize();

    /* 可以显示的色条数 */
    NumColors = GUI_COUNTOF(_aBarData);
    for (i = NumBars = 0, NumBars = 0; i < NumColors; i++)
    {
        NumBars += _aBarData[i].NumBars;
    }
    yStep = (ySize - Y_START) / NumBars;

    /* 显示文本 */
    Rect.x0 = 0;
    Rect.x1 = X_START - 1;
    Rect.y0 = Y_START;
    GUI_SetFont(&GUI_Font16B_ASCII);
    for (i = 0; i < NumColors; i++)
    {
        Rect.y1 = Rect.y0 + yStep * _aBarData[i].NumBars - 1;
        GUI_DispStringInRect(_aBarData[i].s, &Rect, GUI_TA_LEFT | GUI_TA_VCENTER);
        Rect.y0 = Rect.y1 + 1;
    }

    /* 绘制色条 */
    Rect.x0 = X_START;
    Rect.x1 = xSize - 1;
    Rect.y0 = Y_START;
    for (i = 0; i < NumColors; i++)
    {
        for (j = 0; j < _aBarData[i].NumBars; j++)
        {
            Rect.y1 = Rect.y0 + yStep - 1;
            GUI_DrawGradientH(Rect.x0, Rect.y0, Rect.x1, Rect.y1, _aColorStart[j], _aBarData[i].Color);
            Rect.y0 = Rect.y1 + 1;
        }
    }
}

/**
  * @brief GUI主任务
  * @param 无
  * @retval 无
  */
void MainTask(void)
{
    /* 设置背景色 */
    GUI_SetBkColor(GUI_BLACK);
    GUI_Clear();

    /* 设置前景色、字体大小 */
    GUI_SetColor(GUI_RED);
    GUI_SetFont(&GUI_Font24B_ASCII);

    /* 显示色条 */
    _DemoShowColorBar();
    while(1)
    {
        GUI_Delay(100);
    }
}