Code Mon Apr 20
Class Code - See Tabs:
//Main Tab
//Make objects, objects call methods
//Global Variables
ButtonGroup btnGroup; //will hold 4 pattern buttons
Button clearButton;//declare the variable as global - btn is null
color backgroundColor;
Pattern currentPattern; //pointer variable keeps track of active Pattern
Pattern eraserPattern; //has a PShape circle and background fillColor
void setup() {
size( 800, 800);
colorMode(HSB, 360, 100, 100);
backgroundColor = color( 300);
background( backgroundColor);
// Button( float x, float y, float w, float h, String label )
clearButton = new Button( 10, 450, 100, 100, "Clear"); //initialize - move to bottom
Button[] btnArray = new Button[4]; //declare and initialize button array
btnArray[0] = new Button( 10, 10, 100, 100, "Eraser");
PImage img1 = loadImage( "pattern1Btn.png"); //file name with extension
btnArray[1] = new PImageButton( 10, 120, 100, 100, img1);
btnArray[2] = new Button( 10, 230, 100, 100, "Pattern2");
btnArray[3] = new Button( 10, 340, 100, 100, "Pattern3");
btnGroup = new ButtonGroup( btnArray );
//Logic for patterns
PShape s0 = createShape( ELLIPSE, 0,0, 50, 50);
eraserPattern = new Pattern( s0 );
eraserPattern.fillColor = color(280, 100, 100);//start with Purple
currentPattern = eraserPattern;
} // end setup
void draw( ) {
if( mousePressed){
translate( mouseX, mouseY);
displayPattern( );
resetMatrix();
}
displayButtons(); //do after drawing patterns
} //end draw
void mouseClicked( ) {
boolean isChanged = btnGroup.clicked( mouseX, mouseY);
if( isChanged){
changePattern();
}
clearButton.clicked( mouseX, mouseY);
if( clearButton.selected ){
clearCanvas();
clearButton.reset();
}
} //end mouseClicked
void changePattern(){
//TODO add logic to connect buttons to patterns
//activeBtnIndex will let us determine which pattern should be the currentPattern
}
void displayPattern(){
if( currentPattern == eraserPattern){
currentPattern.fillColor = eraserPattern.fillColor;
currentPattern.strokeColor = backgroundColor;
}
currentPattern.display(); //sliders will set colors for other patterns
}
void clearCanvas(){
//TODO add code to draw a rectangle over the full canvas using background color
fill( backgroundColor);
}//end clearCanvas
void displayButtons(){
fill(0);
rect( 0,0, 120, height);//background of menu
btnGroup.display();
clearButton.display();
} //end displayButtons
class Button{
//Variables, Properties, Data stored in memory
float x,y; //position
float w, h; //size
String label;
color selectedColor, defaultColor, currentColor; //HSB
boolean selected; //false by default
//Constructors
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;
selectedColor = color( 280, 100, 100); //purple
defaultColor = color( 280, 70,50);//dull, dark version
currentColor = defaultColor;
selected = false; //button starts in off state
} //end constructor
//METHODS , functions an object can execute for behaviour
void display( ){
fill(currentColor);
rect( x, y, w, h);
fill(0); //set fill to black
textAlign(CENTER); //x,y specifies center line of text
text( label, x+ w/2.0, y+ h/2.0 + 10);
}
void clicked( int mx, int my){ //mouseX, mouseY
if( mx > x && mx < x+w && my> y && my< y+h){ //mouse is inside button box
selected = !selected; //toggle the value
//println("btn has been clicked, selected value " + selected);
if( selected){
currentColor = selectedColor;
}else{
currentColor = defaultColor;
} //end else
}//if
} //clicked method
void reset(){
selected = false;
currentColor = defaultColor;
}
}//end class
class ButtonGroup{
//Properties - data
Button[] buttons;
int activeBtnIndex;
//Constructor
ButtonGroup( Button[] buttons ){
this.buttons = buttons;
activeBtnIndex = 0; //first button is 'active' it is the eraser
}
//Methods
void display(){
for( int i=0; i< buttons.length; i++){
buttons[i].display();
} //end for
} //end display
//returns true if a button has been changed to active state
boolean clicked( int mx, int my ){
boolean isChanged = false;
for( int i=0; i< buttons.length; i++){ //for every button - outer loop
if( buttons[i].selected == false){ //this button is not currently active
buttons[i].clicked( mx, my);
if( buttons[i].selected == true){
activeBtnIndex = i;
isChanged = true;
for( int j=0; j< buttons.length; j++){
if( i != j){ //not the current button
buttons[j].reset();
} //end if
} //end inner loop
}//end if selected is true
}//end if selected is false
} //outer loop
return isChanged;
} //end clicked
}//end class
class PImageButton extends Button{
//Variables - Data
PImage img;
//CONSTRUCTORS
//Button( float x, float y, float w, float h, String label )
PImageButton( float x, float y, float w, float h, PImage img ){
super( x, y, w,h,"" ); //call to base class constructor
this.img = img;
} //end constructor
//METHODS - Behaviours
void display( ){
super.display(); //call the base class method
image( img, x+10, y+10, w-20, h-20);
}
} //end class
class Pattern{
PShape s;
color fillColor, strokeColor;
boolean isSvg; //true if loaded from an external file
Pattern( PShape s ){
this.s = s;
}
void display(){
if( isSvg){
//add some fill logic
}else{ //most of the time
s.setFill( fillColor);
s.setStroke( strokeColor); //black by default
shape( s, 0, 0); //assume translated origin to mouseX, mouseY
}
}
} //end Pattern class
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