I created a graphing program for serial data and have 3 different graphs. I shifted them with translate and have buttons with each graph, but when I try to find the mouse position over each of the graphs. it only picks up the whole window mouse positions. Is there a way to have the mouse know where it is when the translation occurs.

code is below;

int wWidth = 600;
int wHeight = 800;
int graphWidth = wWidth-60;
int graphHeight = wHeight/3-35;
color c1 = color(255,0,0);
color c2 = color(0,255,0);
color c3 = color(0,0,255);

Graph xGraph,yGraph,zGraph;


//Serial parameters
import processing.serial.*;
//Serial and line graph data
Serial myPort;
//X,Y,Z accelerometer values
int valueX=0;
int valueY=0;
int valueZ=0;
//String data from serial
int lf = 10;
String stringToChange="";
//Save data points to graph each redraw
int[] valueXs = new int[graphWidth];
int[] valueYs = new int[graphWidth];
int[] valueZs = new int[graphWidth];

//Button stuff
boolean locked = false;


void setup(){
  //String portName = Serial.list()[0];
  //myPort = new Serial(this, portName, 9600);
  //myPort.bufferUntil('\n');
  size(wWidth,wHeight);
  xGraph = new Graph("X-Graph",c1,0,0,graphWidth,graphHeight,valueXs,1);
  yGraph = new Graph("Y-Graph",c2,0,0,graphWidth,graphHeight,valueYs,1);
  zGraph = new Graph("Z-Graph",c3,0,0,graphWidth,graphHeight,valueZs,4);
 
 
}

void draw(){
 
  background(127);
  translate(25,25);
 
  xGraph.display();
  translate(0,graphHeight+25);
 
  yGraph.display();
  translate(0,graphHeight+25);
  zGraph.display();
}


void serialEvent(Serial myPort) {
 
  //Serial data until new line
  stringToChange = myPort.readStringUntil('\n');
  if (stringToChange != null) {//split X,Y,Z data that has a tab betweein
    String [] data = split(stringToChange, '\t');
    //trim string data and convert to ints
    valueX = int(data[0].trim());
    valueY = int(data[1].trim());
    valueZ = int(data[2].trim());
    // shift all values in array by 1 to free up the new data
    for (int i = 1; i<valueXs.length;i++) {
      valueXs[i-1] = valueXs[i];
      valueYs[i-1] = valueYs[i];
      valueZs[i-1] = valueZs[i];
    }
    //replace new data at last array point and scale if needed
    valueXs[valueXs.length-1]=valueX;
    valueYs[valueYs.length-1]=valueY;
    valueZs[valueZs.length-1]=valueZ;
  }
}

class Graph{
  String gN;
  int gX,gY,gW,gH,yS;
  int [] gV;
  color cV;
  RectButton rect1,rect2,rect3,rect4;
 
  Graph(String gName,color cValue,int graphX,int graphY,int gWidth,int gHeight ,int[] graphYValues,int ySens){
    gN = gName;
    gX = graphX;
    gY = graphY;
    gW = gWidth;
    gH = gHeight;
    gV = graphYValues;
    cV = cValue;
    yS = ySens;
    rect1 = new RectButton("/1",gX,gY+0, 25, 25, c1, c2);
    rect2 = new RectButton("/2",gX,gY+25, 25, 25, c1, c2);
    rect3 = new RectButton("/4",gX,gY+50, 25, 25, c1, c2);
    rect4 = new RectButton("/8",gX,gY+75, 25, 25, c1, c2);
  }
 
  int gHashes = 30;//Grid Spacing
 
  void createGrid(){
    int b = gW/gHashes;//Used for center of X width
    fill(0);
    int gCenterH = gH/2;//Used to find Y height Center
    for(int i=gCenterH/gHashes;i>-gCenterH/gHashes-1;i--){
      stroke(225);
      line(gX+1,gCenterH-gHashes*i,gW-1,gCenterH-gHashes*i);//Print Y line
      textAlign(LEFT);
      fill(255);
      text(i*gHashes,gW+2,gCenterH-gHashes*i+5);//Print text for Y lines
      //X hashes Lines
      for(int j=0;j<b-1;j++){
        if(j!=0){
          line(gX+gW-j*gHashes,gCenterH-gHashes*i+5,gX+gW-j*gHashes,gCenterH-gHashes*i-5);
        }
      }
    }
    for(int k=0;k<b-1;k++){//Print Values of seconds on bottom of graph
      textAlign(CENTER);
      if(k%2==0){
        text(k*gHashes/10,gX+gW-k*gHashes,gH+15);
      }
    }
    rotate(radians(-90));
    textAlign(CENTER);
    fill(cV);
    text(gN,-gH+gH/2,gY-5);
    rotate(radians(90));
    textAlign(LEFT);
    fill(255);
    text("Sec's",gX,gH+15);   
  }
  void displayData(){
    strokeWeight(1);
    beginShape();//show line graph
    stroke(cV);
    noFill();
    for(int i=0;i<gV.length;i++){
      vertex(i+gX,gV[i]/yS+gH/2);
    }
    endShape();
  }
  void update(int x, int y){
    if(locked == false) {
      rect1.update();
      rect2.update();
      rect3.update();
      rect4.update();
    }
    else {
      locked = false;
    }
  }
 
  void display(){
    stroke(0);
    fill(255);
    rect(gX,gY,gW,gH);
    createGrid();
    displayData();
    update(mouseX, mouseY);
   
    rect1.displayButton();
    rect2.displayButton();
    rect3.displayButton();
    rect4.displayButton();
   
 }
}


class Button
{
  String Name;
  int x, y;
  int sizeX;
  int sizeY;
  color basecolor, highlightcolor;
  color currentcolor;
  boolean over = false;
  boolean pressed = false;  

  void update()
  {
    if(over()) { currentcolor = highlightcolor;
    }
    else { currentcolor = basecolor;
    }
  }

  boolean pressed()
  {
    if(over) {
      locked = true;
      currentcolor = highlightcolor;
      return true;
    }
    else {
      locked = false;
      currentcolor = basecolor;
      return false;
    }   
  }

  boolean over()
  {
    return true;
  }

  boolean overRect(int x, int y, int width, int height)
  {
    if (mouseX >= x && mouseX <= x+width &&
      mouseY >= y && mouseY <= y+height) {
      return true;
    }
    else {
      return false;
    }
   
  }
}


class RectButton extends Button
{
  RectButton(String A,int ix, int iy, int xsize,int ysize, color icolor, color ihighlight)
  {
    Name = A;
    x = ix;
    y = iy;
    sizeX = xsize;
    sizeY = ysize;
    basecolor = icolor;
    highlightcolor = ihighlight;
    currentcolor = basecolor;
  }

  boolean over()
  {
    if( overRect(x, y, sizeX, sizeY) ) {
      over = true;
      return true;
    }
    else {
      over = false;
      return false;
    }
  }
  void displayButton()
  {
    stroke(0);
    fill(currentcolor);
    rect(x, y, sizeX, sizeY);
    fill(0);
    textAlign(CENTER);
    text(Name,x+sizeX/2,y+sizeY/2+5);
  }
}