Touch screen buttons to change background

1/*
2 
3 this is a project
4 where i have made custom
5 buttons  used to change colour
6 of background
7 
8*/
9
10#include <Adafruit_GFX.h>  // main graphics library
11#include <TouchScreen.h> // supporting library
12#include  <MCUFRIEND_kbv.h> // main tft library
13
14const int XP=6,XM=A2,YP=A1,YM=7; //320x480  ID=0x9488
15int TS_LEFT=858,TS_RT=142,TS_TOP=757,TS_BOT=104; // values after doing  lcd clibration. you can upload the clibration example from one of three libraries  used here and then copy paste the values here
16
17
18#define LCD_CS A3
19#define  LCD_CD A2
20#define LCD_WR A1
21#define LCD_RD A0
22// optional
23#define LCD_RESET  A4
24
25MCUFRIEND_kbv tft(LCD_CS, LCD_CD, LCD_WR, LCD_RD, LCD_RESET);
26
27//  initialising the colours used in code
28
29#define BLACK   0x0000 
30#define  BLUE    0x001F
31#define RED     0xF800
32#define GREEN   0x07E0
33#define CYAN    0x07FF
34#define MAGENTA 0xF81F
35#define YELLOW  0xFFE0
36#define WHITE   0xFFFF
37
38TouchScreen ts = TouchScreen(XP, YP, XM, YM, 300);
39
40void  setup(){
41   uint16_t ID = tft.readID();
42   if (ID == 0xD3) ID = 0x9488; //  if your LCD have another ID then paste it.     tft.begin(ID);
43    tft.setRotation(1);
44    tft.fillScreen(BLACK);
45    tft.setTextColor(WHITE);
46    tft.setTextSize(3);
47    tft.fillRect(250 , 75 , 100, 100 , BLUE );
48    tft.fillRect(140,75,100,100,RED);
49    tft.setTextSize(3);
50    tft.setTextColor(BLACK);
51    tft.setCursor(165,115);
52    tft.print("RED");
53    tft.setCursor(265,115);
54    tft.print("BLUE");
55    tft.setTextColor(WHITE);
56    tft.setCursor(200,235);
57    tft.print("BLACK");
58    tft.drawRect(250 , 75 , 100, 100 , WHITE );
59    tft.drawRect(140,75,100,100,WHITE);
60    tft.drawRect(195,200,100,100,WHITE);
61    
62    
63  }
64void loop(){
65  int button_on = 0;
66  int pixel_x, pixel_y;   
67  TSPoint p = ts.getPoint();
68  if (p.z > ts.pressureThreshhold) {
69    
70    pixel_x = map(p.y, TS_LEFT=757,  TS_RT=104, 0, 480);// mapping the values
71    pixel_y = map(p.x, TS_TOP=142, TS_BOT=858,  0, 320);
72  
73       // if the LCD sens the touch in following coordinates,  then the                 condition will be executed 
74  
75       if(pixel_x>250  && pixel_x<350 && pixel_y>75 && pixel_y<175 ){
76      
77    pinMode(XM, OUTPUT);
78    pinMode(YP, OUTPUT);
79    
80    tft.fillScreen(BLUE);
81    tft.drawRect(250  , 75 , 100, 100 , BLACK );
82    tft.fillRect(140,75,100,100,RED);
83    tft.drawRect(251  , 76 , 98, 98 , WHITE );
84    tft.drawRect(140,75,100,100,WHITE);
85    tft.fillRect(195,200,100,100,BLACK);
86    tft.drawRect(195,200,100,100,BLACK);
87    tft.drawRect(196,201,100,100,WHITE);
88    tft.setTextSize(3);
89    tft.setTextColor(BLACK);
90    tft.setCursor(165,115);
91    tft.print("RED");
92    tft.setCursor(265,115);
93    tft.print("BLUE");
94    tft.setTextColor(WHITE);
95    tft.setCursor(200,235);
96    tft.print("BLACK");
97   
98   }
99   
100       if(pixel_x>140 && pixel_x<240 && pixel_y>75 && pixel_y<175  ){
101      
102    pinMode(XM, OUTPUT);
103    pinMode(YP, OUTPUT);
104
105    tft.fillScreen(RED);
106    tft.fillRect(250 , 75 , 100, 100 , BLUE );
107    tft.drawRect(140,75,100,100,BLACK);
108    tft.drawRect(250 , 75 , 100, 100 , WHITE );
109    tft.drawRect(141,76,98,98,WHITE);
110    tft.fillRect(195,200,100,100,BLACK);  
111    tft.drawRect(195,200,100,100,BLACK);
112    tft.drawRect(196,201,100,100,WHITE);
113    tft.setTextSize(3);
114    tft.setTextColor(BLACK);
115    tft.setCursor(165,115);
116    tft.print("RED");
117    tft.setCursor(265,115);
118    tft.print("BLUE");
119    tft.setTextColor(WHITE);
120    tft.setCursor(200,235);
121    tft.print("BLACK");
122   }  
123   
124     if(pixel_x>195 && pixel_x<295  && pixel_y>200 && pixel_y<300 ){
125      
126    pinMode(XM, OUTPUT);
127    pinMode(YP,  OUTPUT);
128
129    tft.fillScreen(BLACK);
130    tft.fillRect(250 , 75 , 100, 100  , BLUE );
131    tft.fillRect(140,75,100,100,RED);
132    tft.drawRect(195,200,100,100,WHITE);
133    tft.setTextSize(3);
134    tft.setTextColor(BLACK);
135    tft.setCursor(165,115);
136    tft.print("RED");
137    tft.setCursor(265,115);
138    tft.print("BLUE");
139    tft.setTextColor(WHITE);
140    tft.setCursor(200,235);
141    tft.print("BLACK");
142  }
143 }
144}      
145