simple text input class
also note that the text method has an alternative call which allows you to set the width of a body of text see the text reference for details, and finally here is a text input class I put together for fun in the past. It doesnt have all the features, ie highlighting etc but it should be pretty close.
Also please bear in mind this is an old build so it might have some bugs.
Summary
`
import processing.core.PApplet;
import processing.core.PGraphics;
import processing.core.PVector;
public class TextArea extends KeyboardFunctions{
public PApplet applet;
float x,y,w,h,bx,by,textSize = 12,spacing = 2,txoff,tyoff,lxpos,r1,r2,r3,r4,value;
public int last,lines,xpos,ypos;
public String textArea;
public String text = “”,blankLine=“”,tempLine = “”,label = “”;
public boolean update,blink,visible = true,vScroll,hScroll;
public boolean mdown,toggle,border,bgFill,localTheme,setMouse,isNumber,box;
public char currentKey;
public int col;
public PVector mouse;
public PGraphics canvas,parentCanvas;
public TextArea(float x_,float y_,float w_,float h_,PApplet p){
applet = p;
init(applet);
x = x_;
bx = x;
y = y_;
by = y;
w = w_;
h = h_;
//applet.textSize(textSize);
canvas = applet.createGraphics((int) w+1000,(int) h+1000);
//while(applet.textWidth(blankLine)<w-applet.textWidth("")
};
public TextArea(float x_,float y_,float w_,float h_,String Label,PApplet p){
applet = p;
init(applet);
label = Label;
x = x_;
bx = x;
y = y_;
by = y;
w = w_;
h = h_;
canvas = applet.createGraphics((int) w,(int) h);
//applet.textSize(textSize);
//while(applet.textWidth(blankLine)<w-applet.textWidth("")
};
public void draw(){
setMouse();
// getCursor();
//if(mouse)
if(parentCanvas==null) {
draw(true);
}
else {
draw(parentCanvas,true);
}
};
@Override
public void keyPressed() {
getKey();
};
public void draw(boolean k){
logic(true);
getCursor(true);
//getKey();
if(canvas!=null){
canvas.beginDraw();
canvas.fill(255);
canvas.strokeWeight(0);
canvas.rect(0,0,w,h);
canvas.stroke(0);
canvas.strokeWeight(2);
if(label!=null){
canvas.fill(col);
canvas.text(label,0,0+(textSize)-3);
//println(label);
}
float ry = textSize;
if(textSize>h-textSize)textSize = h;
applet.textSize(textSize);
lxpos = 0;
if(textArea!=null&&ypos<textArea.length&&xpos<=textArea[ypos].length())lxpos = applet.textWidth(textArea[ypos].substring(0,xpos));
if(applet.frameCount%30==0&&blink)blink = false;
else if(applet.frameCount%60==0&&!blink)blink = true;
if(blink)canvas.line(0+lxpos,0+ypos*(textSize+spacing),0+lxpos,0+ypos*(textSize+spacing)+textSize);
if(textArea!=null){
canvas.fill(0,0,255,50);
canvas.noStroke();
for(int i=0;i<textArea.length;i++){
//canvas.rect(0,0+(textSize+spacing)*i,w,ry);
}
canvas.fill(col);
canvas.textSize(textSize);
if(textSize==h)tyoff = -5;
for(int i=0;i<textArea.length;i++){
String s = textArea[i];
canvas.text(s,0+txoff,0+(textSize+spacing)*i+textSize+tyoff);
}
}
canvas.endDraw();
applet.image(canvas,x,y);
//println(canvas.width);
}
};
public void draw(PGraphics scene,boolean b1){
if(scene !=null){
logic(true);
getCursor(true);
if(pos())applet.fill(255);
if(canvas!=null&&visible){
canvas.beginDraw();
canvas.fill(255);
canvas.strokeWeight(0);
canvas.rect(0,0,w,h,r1,r2,r3,r4);
canvas.stroke(0);
canvas.strokeWeight(2);
float ry = textSize;
if(textSize>h-textSize)textSize = h;
if(label!=null){
canvas.textSize(textSize);
canvas.fill(0);
//canvas.text(label,0,0+(textSize));
}
applet.textSize(textSize);
//lxpos = 0;
if(textArea!=null&&xpos>-1&&ypos>-1&&ypos<textArea.length
&&xpos<=textArea[ypos].length())
lxpos = applet.textWidth(textArea[ypos].substring(0,xpos));
if(applet.frameCount%30==0&&blink)blink = false;
else if(applet.frameCount%30==0&&!blink)blink = true;
if(blink&&toggle)canvas.line(lxpos,0+ypos*(textSize+spacing),0+lxpos,0+ypos*(textSize+spacing)+textSize);
if(textArea!=null){
canvas.fill(0,0,255,50);
canvas.noStroke();
for(int i=0;i<textArea.length;i++){
if(textArea.length>1) {
if(i==0)
canvas.rect(x,y+(textSize+spacing)*i,w,ry,r1,r2,0,0);
else if(i==textArea.length-1)
canvas.rect(x,y+(textSize+spacing)*i,w,ry,0,0,r3,r4);
else
canvas.rect(x,y+(textSize+spacing)*i,w,ry);
}else canvas.rect(x,y+(textSize+spacing)*i,w,ry,r1,r2,r3,r4);
}
canvas.fill(col);
canvas.textSize(ry);
if(textSize==h)tyoff = -3;
for(int i=0;i<textArea.length;i++){
String s = textArea[i];
canvas.text(s,0+txoff,0+(textSize+spacing)*i+textSize+tyoff);
}
}
canvas.endDraw();
//scene.beginDraw();
scene.image(canvas,x,y);
//scene.endDraw();
}
}
};
public void update(){
if(update){
if(ypos==last){
}else{
int l = text.length()-1;
textArea[last] = textArea[last]+text.charAt(l);
}
update = false;
}
};
public void keyLogic(){
};
public void logic(){
if(textArea ==null){
textArea = new String[1];
textArea[0] = “”;
}
if(textArea!=null&&textArea.length>0){
lines = textArea.length-1;
last = textArea[lines].length()-1;
}
if(pos()&&applet.mousePressed)toggle = true;
if(!pos()&&applet.mousePressed)toggle = false;
if(vScroll){
}
if(hScroll){
}
//if(!pos&&applet.mousePressed)toggle=false;
//if(
};
public void logic(boolean b1){
if(textArea ==null){
textArea = new String[1];
textArea[0] = “”;
}
if(label!=null&&toggle)label = null;
//if(pos(mouse))applet.println(mouse.x,mouse.y);
if(pos(mouse)&&applet.mousePressed)toggle = true;
if(!pos(mouse)&&applet.mousePressed)toggle = false;
if(vScroll){
}
if(hScroll){
}
//if(!pos&&applet.mousePressed)toggle=false;
//if(
};
public void logic(PVector mouse){
if(mouse!=null){
if(textArea ==null){
textArea = new String[1];
textArea[0] = “”;
}
if(textArea!=null&&textArea.length>0){
lines = textArea.length-1;
last = textArea[lines].length()-1;
}
if(pos(mouse)&&applet.mousePressed)toggle = true;
if(pos(mouse)&&!applet.mousePressed)toggle = false;
if(vScroll){
}
if(hScroll){
}
}
//if(!pos&&applet.mousePressed)toggle=false;
//if(
};
public void getKey(){
boolean b1 = ypos*(textSize+spacing)<h-(textSize+spacing)*2;
boolean b2 = lxpos<w;
if(applet.key!=applet.CODED&&applet.key!=applet.BACKSPACE&&applet.key!=applet.ENTER){
String s = “”;
s+= applet.key;
b2 = lxpos<w - applet.textWidth(s);
}
if(b2&&!b1&&applet.key!=applet.ENTER)b1 = true;
if(toggle&&b1&&b2){
applet.textSize(textSize);
if(applet.key!=applet.CODED&&applet.key!=applet.BACKSPACE&&applet.key!=applet.ENTER){
currentKey = applet.key;
if(textArea==null){
textArea = new String[1];
textArea[0] = text;
xpos = text.length();
}else{
if(ypos<textArea.length&&ypos>-1){
if(xpos==tempLine.length()){
tempLine += currentKey;
textArea[ypos] = tempLine;
xpos = textArea[ypos].length();
setText(textArea);
}else if(xpos<tempLine.length()){
String s1 = tempLine.substring(0,xpos);
String s2 = "";
if(xpos>2)textArea[ypos].substring(xpos-2,textArea[ypos].length()-1);
else if(textArea[ypos].length()>0)
textArea[ypos].substring(0,textArea[ypos].length()-1);
tempLine = s1+currentKey;
for(int i=xpos;i<textArea[ypos].length();i++){
char a = textArea[ypos].charAt(i);
tempLine+= a;
}
textArea[ypos] = tempLine;
xpos =s1.length()+1;
setText(textArea);
}
}
}
}
else if(applet.key==applet.BACKSPACE){
backSpace();
}else if(applet.key==applet.ENTER){
enter();
}
arrowKeys();
}
};
public void backSpace(){
if(textArea!=null){
if(textArea.length==1||ypos==0){
if(xpos==textArea[0].length()){
if(xpos>0){
tempLine = textArea[0].substring(0,textArea[0].length()-1);
xpos = tempLine.length();
textArea[0] = tempLine;
}
}else if(xpos>0){
tempLine = textArea[0].substring(0,xpos-1);
xpos = tempLine.length();
for(int i=xpos+1;i<textArea[0].length();i++){
tempLine+= textArea[0].charAt(i);
}
textArea[0] = tempLine;
}
}else{
if(xpos==textArea[ypos].length()||xpos==0){
if(xpos>0){
tempLine = textArea[ypos].substring(0,textArea[ypos].length()-1);
xpos = tempLine.length();
textArea[ypos] = tempLine;
}else{
String s2 = textArea[ypos].substring(xpos,textArea[ypos].length());
String[] temp = new String[textArea.length-1];
//temp[ypos-1] = textArea[ypos-1];
for(int i=0;i<ypos;i++){
temp[i] = textArea[i];
}
temp[ypos-1]+= s2;
for(int i=ypos+1;i<textArea.length;i++){
temp[i-1] = textArea[i];
}
//
tempLine = textArea[ypos];
xpos = textArea[ypos-1].length();
tempLine += s2;
for(int i=0;i<textArea[ypos].length();i++){
char a = textArea[ypos].charAt(i);
tempLine += a;
}
textArea = temp;
ypos --;
}
}else{
if(xpos>0){
tempLine = textArea[ypos].substring(0,xpos-1);
xpos = tempLine.length();
for(int i=xpos+1;i<textArea[ypos].length();i++){
tempLine+= textArea[ypos].charAt(i);
}
textArea[ypos] = tempLine;
}else{
tempLine = textArea[ypos-1].substring(0,textArea[ypos-1].length());
//xpos = tempLine.length();
for(int i=xpos+1;i<textArea[ypos].length();i++){
tempLine+= textArea[ypos].charAt(i);
}
textArea[ypos] = tempLine;
}
}
}
}
};
public void enter(){
if(ypos ==textArea.length-1){
if(xpos==tempLine.length()){
String temp = new String[textArea.length+1];
for(int i=0;i<temp.length;i++){
if(i<textArea.length)temp[i] = textArea[i];
else {
temp[i] = “”;
}
}
tempLine = “”;
textArea = temp;
setText(textArea);
ypos = textArea.length-1;
}else{
String temp = new String[textArea.length+1];
for(int i=0;i<textArea.length;i++){
temp[i] = textArea[i];
}
String s1 = “”,s2 = “”;
//for(int i=0;i<ypos-1;i++){
// temp[i] = textArea[i];
//}
temp[ypos] = textArea[ypos].substring(0,xpos);
//temp[ypos] = “”;
temp[temp.length-1] = textArea[ypos].substring(xpos,textArea[ypos].length());
tempLine = temp[ypos+1];
//xpos = tempLine.length();
textArea = temp;
setText(textArea);
ypos = textArea.length-1;
//xpos = 0;
}
xpos = 0;
}else{
String []temp = new String[textArea.length+1];
if(xpos==textArea[ypos].length()){
for(int i=0;i<ypos+1;i++){
temp[i] = textArea[i];
}
temp[ypos+1] = "";
for(int i=ypos+2;i<temp.length;i++){
temp[i] = textArea[i-1];
}
tempLine = "";
textArea = temp;
setText(textArea);
ypos ++;
xpos = 0;
}
else{
for(int i=0;i<ypos;i++){
temp[i] = textArea[i];
}
for(int i=ypos+1;i<textArea.length+1;i++){
temp[i] = textArea[i-1];
}
if(xpos>textArea[ypos].length())xpos = textArea[ypos].length();
temp[ypos] = textArea[ypos].substring(0,xpos);
//xpos = temp[ypos].length();
temp[ypos+1] = textArea[ypos].substring(xpos,textArea[ypos].length());
for(int i=ypos+2;i<temp.length;i++){
temp[i] = textArea[i-1];
}
tempLine = temp[ypos];
textArea = temp;
setText(textArea);
//xpos = tempLine.length();
xpos = 0;
ypos ++;
}
}
};
public void arrowKeys(){
if(applet.keyCode==37&&xpos>0){
xpos–;
}else if(applet.keyCode==37&&xpos==0&&ypos>0){
ypos–;
xpos = textArea[ypos].length();
tempLine = textArea[ypos];
}else if(applet.keyCode==39&&xpos<textArea[ypos].length()){
xpos++;
}else if(applet.keyCode==39&&xpos==textArea[ypos].length()&&ypos<textArea.length-1){
xpos = 0;
ypos++;
tempLine = textArea[ypos];
}else if(applet.keyCode==38&&ypos>0){
ypos–;
tempLine = textArea[ypos];
if(tempLine==“”)xpos = 0;
if(xpos>tempLine.length())xpos = tempLine.length();
}else if(applet.keyCode==40&&ypos<textArea.length-1){
ypos++;
tempLine = textArea[ypos];
if(tempLine==“”)xpos = 0;
if(xpos>tempLine.length())xpos = tempLine.length();
}
};
public void setText(String s){
text = s;
textArea = new String[1];
textArea[0] = s;
};
public void setText(String s){
text = “”;
for(int i=0;i<s.length;i++){
String s1 = s[i];
if(s.length>0&&s1.length()>0&&s1.charAt(s1.length()-1)!=‘\n’)s1 += “\n”;
//s[i] = s1;
text+=s1;
}
};
boolean pos(){
boolean k = false;
float max = 0;
return mouse.x>x&&mouse.x<x+w&&mouse.y>y&&mouse.y<y+h;
};
boolean lpos(){
boolean k = false;
float max = 0;
if(textArea!=null)max = textArea.length*(textSize+spacing);
if(parentCanvas==null)return applet.mouseX>x&&applet.mouseX<x+w&&applet.mouseY>y&&applet.mouseY<y+max;
else return mouse!=null&&mouse.x>x&&mouse.x<x+w&&mouse.y>y&&mouse.y<y+max;
};
public boolean pos(PVector m){
boolean k = false;
if(m ==null)m = setMouse();
if(parentCanvas==null)return m.x>x&&m.x<x+w&&m.y>y&&m.y<y+h;
else return m.x>x&&m.x+x<x+w&&m.y>y&&m.y+y<y+h;
};
public boolean lpos(PVector m){
boolean k = false;
float max = textArea.length*(textSize+spacing);
if(parentCanvas==null)return m.x>x&&m.x<x+w&&m.y>y&&m.y<y+max;
else return m.x>x&&m.x+x<x+w&&m.y>y&&m.y+y<y+max;
};
public int getCursor(){
int k = -1;
int kx = -1;
if(pos()){
if(applet.mousePressed)toggle = true;
if(lpos()&&applet.mousePressed){
//canvas.beginDraw();
applet.textSize(textSize);
float max = textArea.length*(textSize+spacing);
float tw = applet.textWidth(textArea[ypos]);
k = applet.floor(applet.map(applet.mouseY,y,y+max,0,textArea.length));
if(k<textArea.length){
ypos = k;
String s = "";
for(int i=0;i<textArea[k].length();i++){
s += textArea[k].charAt(i);
float tw1 = applet.textWidth(s)-5;
if(applet.mouseX<x+tw1&&applet.mouseX>x)break;
else kx = i;
if(i==textArea[k].length()-1&&applet.mouseX>x+tw1&&applet.mouseX>x)kx = textArea[k].length();
}
//canvas.endDraw();
if(kx>-1)xpos = kx;
tempLine = textArea[k];
if(tempLine.length()==0)xpos = 0;
}
if(textArea!=null&&k<textArea.length&&textArea[k].length()==0)xpos = 0;
}}else if(applet.mousePressed)toggle = false;
return k;
};
public int getCursor(boolean b1){
int k = -1;
int kx = -1;
applet.fill(255);
// parentCanvas.ellipse(mouse.x, mouse.y, 20, 20);
// else if(applet.mousePressed)applet.println(“txtarea no mouse”);
if(pos()){
if(applet.mousePressed)toggle = true;
if(lpos()&&applet.mousePressed){
float max = textArea.length*(textSize+spacing);
float tw = applet.textWidth(textArea[ypos]);
k = applet.floor(applet.map(mouse.y,y,y+max,0,textArea.length));
if(k<textArea.length){
//int
ypos = k;
applet.textSize(textSize);
String s = "";
for(int i=0;i<textArea[k].length();i++){
s += textArea[k].charAt(i);
float tw1 = applet.textWidth(s)-5;
if(mouse.x<x+tw1&&mouse.x>x)break;
else kx = i;
if(i==textArea[k].length()-1&&mouse.x>x+tw1&&mouse.x>x)kx = textArea[k].length();
}
if(kx>-1)xpos = kx;
//if(tempLine.length()==0)xpos = 0;
}
if(textArea!=null&&k<textArea.length&&textArea[k].length()==0)xpos = 0;
}}else if(applet.mousePressed)toggle = false;
return k;
};
public int getCursor(PVector mouse){
int k = -1;
int kx = -1;
if(pos()){
if(applet.mousePressed)toggle = true;
if(lpos()&&applet.mousePressed){
float max = textArea.length*(textSize+spacing);
float tw = applet.textWidth(textArea[ypos]);
k = applet.floor(applet.map(mouse.y,y,y+max,0,textArea.length));
if(k<textArea.length){
ypos = k;
applet.textSize(textSize);
String s = "";
for(int i=0;i<textArea[k].length();i++){
s += textArea[k].charAt(i);
float tw1 = applet.textWidth(s)-5;
if(mouse.x<x+tw1&&mouse.x>x)break;
else kx = i;
if(i==textArea[k].length()-1&&mouse.x>x+tw1&&mouse.x>x)kx = textArea[k].length();
}
if(kx>-1)xpos = kx;
}
tempLine = textArea[k];
}}else if(applet.mousePressed)toggle = false;
return k;
};
public PVector setMouse(){
if(parentCanvas==null){
mouse = new PVector(applet.mouseX,applet.mouseY);
}
else {
// mouse.x = applet.mouseX;
// mouse.y = applet.mouseY;
}
return mouse;
};
public void addLine() {
String temp = new String[textArea.length];
for(int i=0;i<textArea.length;i++) {
temp[i] = textArea[i];
}
tempLine = “”;
textArea = temp;
ypos = textArea.length-1;
textArea[ypos] = “”;
xpos = 0;
};
public void addLineAt(int a) {
String temp = new String[textArea.length];
for(int i=0;i<a;i++) {
temp[i] = textArea[i];
}
temp[a] = “”;
tempLine = “”;
for(int i=a;i<textArea.length;i++) {
temp[i] = textArea[i-1];
}
textArea = temp;
ypos = textArea.length-1;
textArea[ypos] = “”;
xpos = 0;
};
public void addLineAt(int a,int j) {
String temp = new String[textArea.length];
for(int i=0;i<a;i++) {
temp[i] = textArea[i].substring(0,j);
}
temp[a] = “”;
for(int i=xpos;i<textArea[ypos].length();i++) {
temp[a] += textArea[ypos].charAt(i);
}
tempLine = temp[a];
for(int i=a;i<textArea.length;i++) {
temp[i] = textArea[i-1];
}
textArea = temp;
ypos = textArea.length-1;
textArea[ypos] = “”;
xpos = 0;
};
//public float
public void setRadius(float a) {
r1 = a;
r2 = a;
r3 = a;
r4 = a;
};
public void setRadius(float a,float b,float c,float d) {
r1 = a;
r2 = b;
r3 = c;
r4 = d;
};
public void reset() {
textArea = new String[1];
textArea[0] = “”;
tempLine = “”;
text = “”;
xpos = 0;
ypos = 0;
};
public void setPos(float a,float b) {
x = a;
bx = a;
y = b;
by = b;
};
public float getValue() {
float a;
if(tempLine.length()>0) {
return Float.parseFloat(tempLine);
}else return -999999;
};
public void save() {
};
public void set(float a) {
if(isNumber) {
value = a;
tempLine = "";
tempLine+= a;
setText(tempLine);
}
};
public void setSize(float a){
box = true;
textSize = a;
h = a;
};
};
`
keyboard functions
Summary
`
import processing.core.PApplet;
import processing.event.KeyEvent;
public class KeyboardFunctions {
PApplet p;
public KeyboardFunctions() {
};
public void init(PApplet p) {
p.registerMethod(“keyEvent”, this);
};
public void destroy(){
//destroys the registermethod or something like that
};
public void keyEvent(final KeyEvent evt) {
switch(evt.getAction()) {
case KeyEvent.PRESS:
keyPressed();
//getKeyCode();
break;
case KeyEvent.RELEASE:
// keyReleased();
//getKeyCode();
break;
}
};
public void keyPressed() {
//this.key1 = key;
//this.keyCode1 = keyCode;
};
public void keyReleased() {
};
};
`
sketch
TextArea t1;
void setup(){
size(400,400);
t1 = new TextArea(20,20,200,200,this);
background(255);
};
void draw(){
t1.draw();
};
`