Button Class
class Button{
///INSTANCE VARIABLES
float x,y; //position
float w,h; //size
boolean selected; //is the button selected / on? true/false
color selectedColor, defaultColor, currentColor;
String label;
///CONSTRUCTORS - no return type declared - match Class-name
Button(float x, float y, float w, float h, String label ){
this.x = x;
this.y = y;
this.w = w;
this.h = h;
this.label = label;
selected = false;
selectedColor = color( 280, 100, 100); ///must be HSB color
defaultColor = color( 280, 70, 70); //slightly darker?
currentColor = defaultColor;
}
///METHODS
void display(){
fill( currentColor);
rect( x, y, w, h);
fill( 0);//black for text
textAlign(CENTER);
text( label, x + w/2, y + (h/2));
}
void clicked( int mx, int my){
if( mx > x && mx < x + w && my > y && my < y+h){
//mouse has been clicked
selected = !selected; //toggle the value between true and false
if( selected){
currentColor = selectedColor;
}else{
currentColor = defaultColor;
}
}
}
} //end Button class
Button btn1; //data-type, variable-name //null
int x; //data-type, variable-name //0
///Initialize things - variables
void setup(){
size( 600, 600);
colorMode(HSB, 360, 100, 100);
x= 10; //initialize the variable
btn1 = new Button( 10, 10, 100, 100, "Press" ); //initialize by calling a Button constructor
}
//makes it a frame-based application
void draw( ){
btn1.display(); //have the button instance call it's display( ) method
}
//add code for mouseClicked
void mouseClicked( ){
btn1.clicked( mouseX, mouseY);
}