/**
  ******************************************************************************
  * @file    palette.c
  * @author  fire
  * @version V1.0
  * @date    2016-xx-xx
  * @brief   触摸画板应用函数
  ******************************************************************************
  * @attention
  *
  * 实验平台:野火  STM32 H750 开发板 
  * 论坛    :http://www.firebbs.cn
  * 淘宝    :http://firestm32.taobao.com
  *
  ******************************************************************************
  */

#include "./touch/palette.h"
#include "./touch/bsp_touch_gtxx.h"
#include "./lcd/bsp_lcd.h"

extern uint32_t  ActiveLayer;
extern LCD_DrawPropTypeDef DrawProp[MAX_LAYER_NUMBER];

/*按钮结构体数组*/
Touch_Button button[BUTTON_NUM];

/*画笔参数*/
Brush_Style brush;

static void Draw_Color_Button(void *btn);
static void Draw_Clear_Button(void *btn);
static void Draw_Shape_Button(void *btn);

static void Command_Select_Color(void *btn);
static void Command_Select_Brush(void *btn);
static void Command_Clear_Palette(void *btn);

static void LCD_DrawUniLineCircle(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2,uint8_t thick );



/**
* @brief  Palette_Init 画板初始化
* @param  无
* @retval 无
*/
void Palette_Init(void)
{
  
  uint8_t i;

  /* 整屏清为白色 */
  LCD_Clear(LCD_COLOR_WHITE);	/* 清屏，显示全黑 */

  
  /* 初始化按钮 */
  Touch_Button_Init();
  
  /* 描绘按钮 */
  for(i=0;i<BUTTON_NUM;i++)
  {
    button[i].draw_btn(&button[i]);
  }
  
	
  /* 初始化画笔 */
  brush.color = LCD_COLOR_BLACK;
  brush.shape = LINE_SINGLE_PIXCEL;
	
	LCD_SetTextColor(brush.color);
  
}




/**
* @brief  Touch_Button_Init 初始化按钮参数
* @param  无
* @retval 无
*/
void Touch_Button_Init(void)
{
  /*第一列，主要为颜色按钮*/
  button[0].start_x = BUTTON_START_X;
  button[0].start_y = 0;
  button[0].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH ;
  button[0].end_y = COLOR_BLOCK_HEIGHT;
  button[0].para = LCD_COLOR_BLACK;
  button[0].touch_flag = 0;  
  button[0].draw_btn = Draw_Color_Button ;
  button[0].btn_command = Command_Select_Color ;
  
  button[1].start_x = BUTTON_START_X;
  button[1].start_y = COLOR_BLOCK_HEIGHT;
  button[1].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH ;
  button[1].end_y = COLOR_BLOCK_HEIGHT*2;
  button[1].para = LCD_COLOR_DARKGRAY;
  button[1].touch_flag = 0;  
  button[1].draw_btn = Draw_Color_Button ;
  button[1].btn_command = Command_Select_Color ;
  
  button[2].start_x = BUTTON_START_X;
  button[2].start_y = COLOR_BLOCK_HEIGHT*2;
  button[2].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH ;
  button[2].end_y = COLOR_BLOCK_HEIGHT*3;
  button[2].para = LCD_COLOR_BLUE;
  button[2].touch_flag = 0;  
  button[2].draw_btn = Draw_Color_Button ;
  button[2].btn_command = Command_Select_Color ;
  
  button[3].start_x = BUTTON_START_X;
  button[3].start_y = COLOR_BLOCK_HEIGHT*3;
  button[3].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH ;
  button[3].end_y = COLOR_BLOCK_HEIGHT*4;
  button[3].para = LCD_COLOR_DARKBLUE;
  button[3].touch_flag = 0;  
  button[3].draw_btn = Draw_Color_Button ;
  button[3].btn_command = Command_Select_Color ;
  
  button[4].start_x = BUTTON_START_X;
  button[4].start_y = COLOR_BLOCK_HEIGHT*4;
  button[4].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH ;
  button[4].end_y = COLOR_BLOCK_HEIGHT*5;
  button[4].para = LCD_COLOR_RED;
  button[4].touch_flag = 0;  
  button[4].draw_btn = Draw_Color_Button ;
  button[4].btn_command = Command_Select_Color ;
  
  button[5].start_x = BUTTON_START_X;
  button[5].start_y = COLOR_BLOCK_HEIGHT*5;
  button[5].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH ;
  button[5].end_y = COLOR_BLOCK_HEIGHT*6;
  button[5].para = LCD_COLOR_MAGENTA;
  button[5].touch_flag = 0;  
  button[5].draw_btn = Draw_Color_Button ;
  button[5].btn_command = Command_Select_Color ;
  
  button[6].start_x = BUTTON_START_X;
  button[6].start_y = COLOR_BLOCK_HEIGHT*6;
  button[6].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH ;
  button[6].end_y = COLOR_BLOCK_HEIGHT*7;
  button[6].para = LCD_COLOR_GREEN;
  button[6].touch_flag = 0;  
  button[6].draw_btn = Draw_Color_Button ;
  button[6].btn_command = Command_Select_Color ;
  
  button[7].start_x = BUTTON_START_X;
  button[7].start_y = COLOR_BLOCK_HEIGHT*7;
  button[7].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH ;
  button[7].end_y = COLOR_BLOCK_HEIGHT*8;
  button[7].para = LCD_COLOR_CYAN;
  button[7].touch_flag = 0;  
  button[7].draw_btn = Draw_Color_Button ;
  button[7].btn_command = Command_Select_Color ;
  
  button[8].start_x = BUTTON_START_X;
  button[8].start_y = COLOR_BLOCK_HEIGHT*8;
  button[8].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH ;
  button[8].end_y = LCD_PIXEL_HEIGHT;
  button[8].para = LCD_COLOR_LIGHTGRAY;
  button[8].touch_flag = 0;  
  button[8].draw_btn = Draw_Clear_Button ;
  button[8].btn_command = Command_Clear_Palette ;
  
  
  
  /*第二列，主要为画刷按钮*/
  button[9].start_x = BUTTON_START_X + COLOR_BLOCK_WIDTH;
  button[9].start_y = 0;
  button[9].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH*2 ;
  button[9].end_y = COLOR_BLOCK_HEIGHT;
  button[9].para = LINE_SINGLE_PIXCEL;
  button[9].touch_flag = 0;  
  button[9].draw_btn = Draw_Shape_Button ;
  button[9].btn_command = Command_Select_Brush ;
  
  button[10].start_x = BUTTON_START_X + COLOR_BLOCK_WIDTH;
  button[10].start_y = COLOR_BLOCK_HEIGHT;
  button[10].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH*2 ;
  button[10].end_y = COLOR_BLOCK_HEIGHT*2;
  button[10].para = LINE_2_PIXCEL;
  button[10].touch_flag = 0;  
  button[10].draw_btn = Draw_Shape_Button ;
  button[10].btn_command = Command_Select_Brush ;
  
  button[11].start_x = BUTTON_START_X + COLOR_BLOCK_WIDTH;
  button[11].start_y = COLOR_BLOCK_HEIGHT*2;
  button[11].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH*2 ;
  button[11].end_y = COLOR_BLOCK_HEIGHT*3;
  button[11].para = LINE_4_PIXCEL;
  button[11].touch_flag = 0;  
  button[11].draw_btn = Draw_Shape_Button ;
  button[11].btn_command = Command_Select_Brush ;
  
  button[12].start_x = BUTTON_START_X + COLOR_BLOCK_WIDTH;
  button[12].start_y = COLOR_BLOCK_HEIGHT*3;
  button[12].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH*2 ;
  button[12].end_y = COLOR_BLOCK_HEIGHT*4;
  button[12].para = LINE_6_PIXCEL;
  button[12].touch_flag = 0;  
  button[12].draw_btn = Draw_Shape_Button ;
  button[12].btn_command = Command_Select_Brush ;
  
  button[13].start_x = BUTTON_START_X + COLOR_BLOCK_WIDTH;
  button[13].start_y = COLOR_BLOCK_HEIGHT*4;
  button[13].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH*2 ;
  button[13].end_y = COLOR_BLOCK_HEIGHT*5;
  button[13].para = LINE_8_PIXCEL;
  button[13].touch_flag = 0;  
  button[13].draw_btn = Draw_Shape_Button ;
  button[13].btn_command = Command_Select_Brush ;
  
  button[14].start_x = BUTTON_START_X + COLOR_BLOCK_WIDTH;
  button[14].start_y = COLOR_BLOCK_HEIGHT*5;
  button[14].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH*2 ;
  button[14].end_y = COLOR_BLOCK_HEIGHT*6;
  button[14].para = LINE_16_PIXCEL;
  button[14].touch_flag = 0;  
  button[14].draw_btn = Draw_Shape_Button ;
  button[14].btn_command = Command_Select_Brush ;
  
  button[15].start_x = BUTTON_START_X + COLOR_BLOCK_WIDTH;
  button[15].start_y = COLOR_BLOCK_HEIGHT*6;
  button[15].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH*2 ;
  button[15].end_y = COLOR_BLOCK_HEIGHT*7;
  button[15].para = LINE_20_PIXCEL;
  button[15].touch_flag = 0;  
  button[15].draw_btn = Draw_Shape_Button ;
  button[15].btn_command = Command_Select_Brush ;   
  
  button[16].start_x = BUTTON_START_X + COLOR_BLOCK_WIDTH;
  button[16].start_y = COLOR_BLOCK_HEIGHT*7;
  button[16].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH*2 ;
  button[16].end_y = COLOR_BLOCK_HEIGHT*8;
  button[16].para = LINE_WITH_CIRCLE;
  button[16].touch_flag = 0;  
  button[16].draw_btn = Draw_Shape_Button ;
  button[16].btn_command = Command_Select_Brush ;
  
  button[17].start_x = BUTTON_START_X + COLOR_BLOCK_WIDTH;
  button[17].start_y = COLOR_BLOCK_HEIGHT*8;
  button[17].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH*2 ;
  button[17].end_y = LCD_PIXEL_HEIGHT;
  button[17].para = RUBBER;
  button[17].touch_flag = 0;  
  button[17].draw_btn = Draw_Shape_Button ;
  button[17].btn_command = Command_Select_Brush ;

}

/**
* @brief  Touch_Button_Down 按键被按下时调用的函数，由触摸屏调用
* @param  x 触摸位置的x坐标
* @param  y 触摸位置的y坐标
* @retval 无
*/
void Touch_Button_Down(uint16_t x,uint16_t y)
{
  uint8_t i;
  for(i=0;i<BUTTON_NUM;i++)
  {
    /* 触摸到了按钮 */
    if(x<=button[i].end_x && y<=button[i].end_y && y>=button[i].start_y && x>=button[i].start_x )
    {
      if(button[i].touch_flag == 0)     /*原本的状态为没有按下，则更新状态*/
      {
      button[i].touch_flag = 1;         /* 记录按下标志 */
      
      button[i].draw_btn(&button[i]);  /*重绘按钮*/
      }        
      
    }
    else if(button[i].touch_flag == 1) /* 触摸移出了按键的范围且之前有按下按钮 */
    {
      button[i].touch_flag = 0;         /* 清除按下标志，判断为误操作*/
      
      button[i].draw_btn(&button[i]);   /*重绘按钮*/
    }

  }

}

/**
* @brief  Touch_Button_Up 按键被释放时调用的函数，由触摸屏调用
* @param  x 触摸最后释放时的x坐标
* @param  y 触摸最后释放时的y坐标
* @retval 无
*/
void Touch_Button_Up(uint16_t x,uint16_t y)
{
   uint8_t i; 
   for(i=0;i<BUTTON_NUM;i++)
   {
     /* 触笔在按钮区域释放 */
      if((x<button[i].end_x && x>button[i].start_x && y<button[i].end_y && y>button[i].start_y))
      {        
        button[i].touch_flag = 0;       /*释放触摸标志*/
        
        button[i].draw_btn(&button[i]); /*重绘按钮*/        
      
        button[i].btn_command(&button[i]);  /*执行按键的功能命令*/
        
        break;
      }
    }  

}

/**
* @brief  Draw_Trail 在画板区域描绘触摸轨迹
* @param  pre_x 上一点的x坐标
* @param  pre_y 上一点的y坐标
* @param  x     最新一点的x坐标
* @param  y     最新一点的y坐标
* @param  brush 画刷参数
* @retval 无
*/
void Draw_Trail(int16_t pre_x,int16_t pre_y,int16_t x,int16_t y,Brush_Style* brush)
{
  /*设置画板区域为活动窗口,bsp_lcd.c驱动还没有这样的函数，用于限制绘画窗口*/
//  RA8875_SetActiveWindow(PALETTE_START_X,PALETTE_START_Y,PALETTE_END_X,PALETTE_END_Y);
  
	
  /*触摸位置在画板区域*/
  if(x>PALETTE_START_X && pre_x>PALETTE_START_X )
  {
    switch(brush->shape)  /*根据画刷参数描绘不同的轨迹*/
    {
      /* 描绘1像素宽度的轨迹线 */
      case LINE_SINGLE_PIXCEL:                 
            if(pre_x< 0 || pre_y < 0) //新的笔迹
            {      
              LCD_DrawPixel(x, y, DrawProp[ActiveLayer].TextColor);               
            }
            else //继续上一次的笔迹
            {      
              LCD_DrawLine(pre_x,pre_y,x,y);
            } 
        
        break;
            
      case LINE_2_PIXCEL:
        
				if(x-1<PALETTE_START_X||pre_x-1<PALETTE_START_X)	//画板左边界
					break;

        /* 描绘2像素宽度的轨迹线 */
        LCD_DrawUniLineCircle(pre_x,pre_y,x,y,1);
        
        break;
      
      case LINE_4_PIXCEL:
				
				if(x-2<PALETTE_START_X||pre_x-2<PALETTE_START_X)	//画板左边界
					break;
        
            LCD_DrawUniLineCircle(pre_x,pre_y,x,y,2);

        break;
      
      case LINE_6_PIXCEL:
        
				if(x-3<PALETTE_START_X||pre_x-3<PALETTE_START_X)	//画板左边界
					break;
      
        LCD_DrawUniLineCircle(pre_x,pre_y,x,y,3);
        
        break;
      
      case LINE_8_PIXCEL:
				
				if(x-4<PALETTE_START_X||pre_x-4<PALETTE_START_X)	//画板左边界
					break;
        
            LCD_DrawUniLineCircle(pre_x,pre_y,x,y,4);

        break;
      
     case LINE_16_PIXCEL:
			 
		 		if(x-8<PALETTE_START_X||pre_x-8<PALETTE_START_X)	//画板左边界
					break;
        
            LCD_DrawUniLineCircle(pre_x,pre_y,x,y,8);

        break;
            
      case LINE_20_PIXCEL:
				
				if(x-10<PALETTE_START_X ||pre_x-10<PALETTE_START_X)	//画板左边界
					break;
        
            LCD_DrawUniLineCircle(pre_x,pre_y,x,y,10);

        break;
      
      /*描绘带珠子的单像素线*/
      case LINE_WITH_CIRCLE:  

		 		if(x-3<PALETTE_START_X||pre_x-3<PALETTE_START_X)	//画板左边界
					break;			
           
            if(pre_x< 0 || pre_y< 0)//新的笔迹
            {      
              LCD_DrawPixel(x, y, DrawProp[ActiveLayer].TextColor);
            }
            else //继续上一次的笔迹
            {      
              LCD_DrawLine(pre_x,pre_y,x,y);
              LCD_FillCircle(x,y,3);
            } 
        
        break;
           
      /*橡皮功能*/            
      case RUBBER:
				
				if(x-20<PALETTE_START_X ||						//画板左边界
					  x+20>LCD_PIXEL_WIDTH || x-20<0 || //液晶左右边界
						y+20>LCD_PIXEL_HEIGHT || y-20<0)	 //液晶上下边界				
					break;	
			
//        if(x>PALETTE_START_X+20)
        {
						LCD_SetColors(LCD_COLOR_WHITE,LCD_COLOR_WHITE);
            
						LCD_FillRect( x-40/2,
                                y-40/2,
                                40,
                                40);   
      
        }
      break;

    }
  }
  
  /*退出局限画板的绘图窗口，bsp_lcd.c驱动还没有这样的函数，用于限制绘画窗口*/
//  RA8875_SetActiveWindow(0,0,LCD_PIXEL_WIDTH,LCD_PIXEL_HEIGHT);


}


/**
* @brief  Draw_Color_Button 颜色按钮的描绘函数
* @param  btn Touch_Button 类型的按键参数
* @retval 无
*/
static void Draw_Color_Button(void *btn)
{
  Touch_Button *ptr = (Touch_Button *)btn;
  
  /*释放按键*/
  if(ptr->touch_flag == 0)
  {
		/*背景为功能键相应的颜色*/
		LCD_SetColors(ptr->para,LCD_COLOR_WHITE);
    LCD_FillRect(ptr->start_x,
                      ptr->start_y,
                      ptr->end_x - ptr->start_x,
											ptr->end_y - ptr->start_y);
  }
  else  /*按键按下*/
  {
    /*白色背景*/
		LCD_SetColors(LCD_COLOR_WHITE,LCD_COLOR_WHITE);
    LCD_FillRect(ptr->start_x,
                      ptr->start_y,
                      ptr->end_x - ptr->start_x,
											ptr->end_y - ptr->start_y);
  } 
    /*按钮边框*/
		LCD_SetColors(LCD_COLOR_DARKBLUE,LCD_COLOR_WHITE);
    LCD_DrawRect(ptr->start_x,
									ptr->start_y,
									ptr->end_x - ptr->start_x,
									ptr->end_y - ptr->start_y);
  
}


/**
* @brief  Draw_Clear_Button 清屏按钮的描绘函数
* @param  btn Touch_Button 类型的按键参数
* @retval 无
*/
static void Draw_Clear_Button(void *btn)
{
  Touch_Button *ptr = (Touch_Button *)btn;
    
  /*释放按键*/
  if(ptr->touch_flag == 0)
  {
	
		LCD_SetColors(LCD_COLOR_LIGHTGRAY,LCD_COLOR_WHITE);
    LCD_FillRect(ptr->start_x,
                      ptr->start_y,
                      ptr->end_x - ptr->start_x,
											ptr->end_y - ptr->start_y);
    

		
		LCD_SetColors(LCD_COLOR_RED,LCD_COLOR_LIGHTGRAY);
		/*选择字体，使用中英文显示时，尽量把英文选择成16*24的字体，
		*中文字体大小是24*24的，需要其它字体请自行制作字模*/
		/*这个函数只对英文字体起作用*/
		LCD_SetFont(&LCD_DEFAULT_FONT);
		LCD_DispString_EN_CH( (ptr->end_y - ptr->start_y)/2 + ptr->start_y - 12,
                          (ptr->end_x - ptr->start_x)/2 - 6,                     
                          (uint8_t*)"C");//清屏
  }
  else  /*按键按下*/
  {
		
		LCD_SetColors(LCD_COLOR_WHITE,LCD_COLOR_WHITE);
    LCD_FillRect(ptr->start_x,
                      ptr->start_y,
                      ptr->end_x - ptr->start_x,
											ptr->end_y - ptr->start_y);
    
		
		LCD_SetColors(LCD_COLOR_RED,LCD_COLOR_WHITE);
		/*选择字体，使用中英文显示时，尽量把英文选择成16*24的字体，
		*中文字体大小是24*24的，需要其它字体请自行制作字模*/
		/*这个函数只对英文字体起作用*/
		LCD_SetFont(&LCD_DEFAULT_FONT);
//    LCD_DispString_EN_CH( ptr->start_y+25,
//														ptr->start_x + (ptr->end_x - ptr->start_x - 24*2 )/2,                     
//														(uint8_t*)"清屏");
  } 
  
     /*按钮边框*/
		LCD_SetColors(LCD_COLOR_DARKBLUE,LCD_COLOR_WHITE);
    LCD_DrawRect(ptr->start_x,
										ptr->start_y,
										ptr->end_x - ptr->start_x,
										ptr->end_y - ptr->start_y);
  
}

/**
* @brief  Draw_Shape_Button 笔刷按钮的描绘函数
* @param  btn Touch_Button 类型的按键参数
* @retval 无
*/
static void Draw_Shape_Button(void *btn)
{
  Touch_Button *ptr = (Touch_Button *)btn;
  
   uint16_t i;
  
    /* 背景颜色 没按下时为灰色，按下时为白色*/                  
    if(ptr->touch_flag ==0 )
    {
			
			LCD_SetColors(LCD_COLOR_LIGHTGRAY,LCD_COLOR_WHITE);
			LCD_FillRect(ptr->start_x,
                      ptr->start_y,
                      ptr->end_x - ptr->start_x,
											ptr->end_y - ptr->start_y);
      

			 /*显示文字时的背景颜色*/     
			LCD_SetColors(LCD_COLOR_DARKBLUE,LCD_COLOR_LIGHTGRAY);
			LCD_DrawRect(ptr->start_x,
										ptr->start_y,
										ptr->end_x - ptr->start_x,
										ptr->end_y - ptr->start_y);

    }
    else
    {

			LCD_SetColors(LCD_COLOR_WHITE,LCD_COLOR_WHITE);
			LCD_FillRect(ptr->start_x,
                      ptr->start_y,
                      ptr->end_x - ptr->start_x,
											ptr->end_y - ptr->start_y);
      

			 /*显示文字时的背景颜色*/     
			LCD_SetColors(LCD_COLOR_DARKBLUE,LCD_COLOR_WHITE);
			LCD_DrawRect(ptr->start_x,
										ptr->start_y,
										ptr->end_x - ptr->start_x,
										ptr->end_y - ptr->start_y);
    }
  
	LCD_SetColors(LCD_COLOR_BLACK,LCD_COLOR_WHITE);	
  /*根据画刷形状描绘按钮图案*/
 switch(ptr->para)
  {
    		
    case LINE_SINGLE_PIXCEL:      
     		
				LCD_SetColors(LCD_COLOR_BLACK,LCD_COLOR_WHITE);
        LCD_DrawLine(ptr->start_x+20,
                          ptr->start_y+(ptr->end_y-ptr->start_y)/2,
                          ptr->end_x-20,
                          ptr->start_y+(ptr->end_y-ptr->start_y)/2);
      
      break;   

      
    case LINE_2_PIXCEL:
        
        LCD_DrawUniLineCircle(ptr->start_x+20,
                          ptr->start_y+(ptr->end_y-ptr->start_y)/2,ptr->end_x-20,
                          ptr->start_y+(ptr->end_y-ptr->start_y)/2,
                          1);
 
    
      break;
        
    case LINE_4_PIXCEL:
   
            LCD_DrawUniLineCircle(ptr->start_x+20,
                          ptr->start_y+(ptr->end_y-ptr->start_y)/2,ptr->end_x-20,
                          ptr->start_y+(ptr->end_y-ptr->start_y)/2,
                          2);
 
    
      break;
    
        case LINE_6_PIXCEL:
        
        LCD_DrawUniLineCircle(ptr->start_x+20,
                          ptr->start_y+(ptr->end_y-ptr->start_y)/2,ptr->end_x-20,
                          ptr->start_y+(ptr->end_y-ptr->start_y)/2,
                          3);
 
    
      break;
        
     case LINE_8_PIXCEL:
   
            LCD_DrawUniLineCircle(ptr->start_x+20,
                          ptr->start_y+(ptr->end_y-ptr->start_y)/2,ptr->end_x-20,
                          ptr->start_y+(ptr->end_y-ptr->start_y)/2,
                          4);
 
    
      break;
    
       case LINE_16_PIXCEL:
   
            LCD_DrawUniLineCircle(ptr->start_x+20,
                          ptr->start_y+(ptr->end_y-ptr->start_y)/2,ptr->end_x-20,
                          ptr->start_y+(ptr->end_y-ptr->start_y)/2,
                          8 );
 
    
      break;
        
       case LINE_20_PIXCEL:
   
            LCD_DrawUniLineCircle(ptr->start_x+20,
                          ptr->start_y+(ptr->end_y-ptr->start_y)/2,ptr->end_x-20,
                          ptr->start_y+(ptr->end_y-ptr->start_y)/2,
                          10);
 
    
      break;
            
            
    
     case LINE_WITH_CIRCLE: 
        LCD_SetColors(LCD_COLOR_BLACK,LCD_COLOR_WHITE);      
        LCD_DrawLine(ptr->start_x+5,
                          ptr->start_y+(ptr->end_y-ptr->start_y)/2,
                          ptr->end_x-5,
                          ptr->start_y+(ptr->end_y-ptr->start_y)/2);
		 
        
        for(i=0;i<((ptr->end_x - ptr->start_x-10)/10);i++)
        {
        
        LCD_FillCircle(ptr->start_x+5+i*10,
                            ptr->start_y+(ptr->end_y-ptr->start_y)/2,
                            3);
        

        }

      
    break;
      
      
    case RUBBER:
//			LCD_SetColors(LCD_COLOR_WHITE,LCD_COLOR_BLACK);
//       LCD_FillRect( ptr->start_x+((ptr->end_x - ptr->start_x -40)/2),
//                          ptr->start_y+ ((ptr->end_y - ptr->start_y-40 -30)/2),
//                          40,
//                          40 );   // 画矩形框
      
  
			LCD_SetColors(LCD_COLOR_RED,LCD_COLOR_LIGHTGRAY);    

		/*选择字体，使用中英文显示时，尽量把英文选择成16*24的字体，
		*中文字体大小是24*24的，需要其它字体请自行制作字模*/
		/*这个函数只对英文字体起作用*/
		LCD_SetFont(&Font24);
    LCD_DispString_EN_CH((ptr->end_y - ptr->start_y)/2 + ptr->start_y - 12,
                                  ptr->start_x + (ptr->end_x - ptr->start_x)/2 - 6,                     
                                 (uint8_t*)"R");//橡皮
		

    break;

  }
  
}

/**
* @brief  Command_Select_Color 切换画刷颜色，颜色按键的功能执行函数
* @param  btn Touch_Button 类型的按键参数
* @retval 无
*/
static void Command_Select_Color(void *btn)
{
  Touch_Button *ptr = (Touch_Button *)btn;
  
  brush.color = ptr->para;	
	LCD_SetColors(brush.color,LCD_COLOR_WHITE);
  
  if(brush.shape == RUBBER)
  {
    brush.shape = LINE_SINGLE_PIXCEL;
  }

}

/**
* @brief  Command_Select_Brush 切换画刷颜色，画刷按键的功能执行函数
* @param  btn Touch_Button 类型的按键参数
* @retval 无
*/
static void Command_Select_Brush(void *btn)
{
  Touch_Button *ptr = (Touch_Button *)btn;
  brush.shape =(SHAPE) ptr->para;
	LCD_SetColors(brush.color,LCD_COLOR_WHITE);
}

/**
* @brief  Command_Select_Brush 切换画刷颜色，清屏按键的功能执行函数
* @param  btn Touch_Button 类型的按键参数
* @retval 无
*/
static void Command_Clear_Palette(void *btn)
{
		LCD_SetColors(LCD_COLOR_WHITE,LCD_COLOR_WHITE);
    LCD_FillRect(PALETTE_START_X,
                      PALETTE_START_Y,                    
                      PALETTE_END_X-(PALETTE_START_X+1), 
											PALETTE_END_Y-PALETTE_START_Y );

}



#define ABS(X)  ((X) > 0 ? (X) : -(X))

/**
  * @brief  在两点之间描绘轨迹
  * @param  x1: specifies the point 1 x position.
  * @param  y1: specifies the point 1 y position.
  * @param  x2: specifies the point 2 x position.
  * @param  y2: specifies the point 2 y position.
  * @retval None
  */
static void LCD_DrawUniLineCircle(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2,uint8_t thick )
{
  int16_t deltax = 0, deltay = 0, x = 0, y = 0, xinc1 = 0, xinc2 = 0, 
  yinc1 = 0, yinc2 = 0, den = 0, num = 0, numadd = 0, numpixels = 0, 
  curpixel = 0;
  
  deltax = ABS(x2 - x1);        /* The difference between the x's */
  deltay = ABS(y2 - y1);        /* The difference between the y's */
  x = x1;                       /* Start x off at the first pixel */
  y = y1;                       /* Start y off at the first pixel */
  
	
  if (x2 >= x1)                 /* The x-values are increasing */
  {
    xinc1 = 1;
    xinc2 = 1;
  }
  else                          /* The x-values are decreasing */
  {
    xinc1 = -1;
    xinc2 = -1;
  }
  
  if (y2 >= y1)                 /* The y-values are increasing */
  {
    yinc1 = 1;
    yinc2 = 1;
  }
  else                          /* The y-values are decreasing */
  {
    yinc1 = -1;
    yinc2 = -1;
  }
  
  if (deltax >= deltay)         /* There is at least one x-value for every y-value */
  {
    xinc1 = 0;                  /* Don't change the x when numerator >= denominator */
    yinc2 = 0;                  /* Don't change the y for every iteration */
    den = deltax;
    num = deltax / 2;
    numadd = deltay;
    numpixels = deltax;         /* There are more x-values than y-values */
  }
  else                          /* There is at least one y-value for every x-value */
  {
    xinc2 = 0;                  /* Don't change the x for every iteration */
    yinc1 = 0;                  /* Don't change the y when numerator >= denominator */
    den = deltay;
    num = deltay / 2;
    numadd = deltax;
    numpixels = deltay;         /* There are more y-values than x-values */
  }
  
  for (curpixel = 0; curpixel <= numpixels; curpixel++)
  {
		
		//判断边界
		if(x+thick>LCD_PIXEL_WIDTH || x-thick<0 || //液晶左右边界
			y+thick>LCD_PIXEL_HEIGHT || y-thick<0  ) //液晶上下边界
			continue;

    LCD_FillCircle(x,y,thick);             /* Draw the current pixel */
    num += numadd;              /* Increase the numerator by the top of the fraction */
    if (num >= den)             /* Check if numerator >= denominator */
    {
      num -= den;               /* Calculate the new numerator value */
      x += xinc1;               /* Change the x as appropriate */
      y += yinc1;               /* Change the y as appropriate */
    }
    x += xinc2;                 /* Change the x as appropriate */
    y += yinc2;                 /* Change the y as appropriate */
  }
}




/* ------------------------------------------end of file---------------------------------------- */