Closing second window by button event

8bit_biker

Closing second window by button event

in Contributed Library Questions • 7 months ago

Hi everybody!

I'm trying to realize a little sketch in which second window is opened when space bar is hit. This is my sketch:

import controlP5.*;
import processing.serial.*;
PFrame f;
secondApplet s;
ControlP5 cp5;
Serial serial;
Serial myPort;
ListBox l;
void setup() {
size(320, 240);
}
void draw() {
background(0, 255, 0);
fill(255);
}
public class PFrame extends Frame {
public PFrame() {
setBounds(600, 300, 400, 300);
s = new secondApplet();
add(s);
s.init();
show();
}
}
public class secondApplet extends PApplet {
public void setup() {
size(400, 300);
cp5 = new ControlP5(this);
cp5.addBang("Close")
.setPosition(140, 190)
.setSize(50, 20)
.getCaptionLabel().align(ControlP5.CENTER, ControlP5.CENTER)
;
}
public void draw() {
background(255, 0, 0);
}
}
void keyPressed() {
if (key==' ') {
key=0;
PFrame f = new PFrame();
s.background(0, 0, 255);
s.fill(100);
s.rect(10, 20, frameCount, 0, 10);
s.redraw();
}
}
public void Close() {
s.stop();
}

As You can observe second window has button called "Close", which should close the window (letting the main window opened), but it does not happen. I would like to know if it's even possible to close the second window by the "x" button in titlebar without close the first one. Can you help me??

Replies(4)

ramin

Re: Closing second window by button event

7 months ago

hello 8bit biker.

The PApplet inherits from the Applet class. These applets are inside a Frame. So the way to go is to get this Frame and add WindowListener to it.

add this to your 2nd Applet

Frame f;

as a fieldvariable of this class.

into the setup

f = (Frame)getAccessibleContext().getAccessibleParent();
f.addWindowListener(new WindowListener() {
public void windowActivated(WindowEvent arg0) {
// TODO Auto-generated method stub
}
public void windowClosed(WindowEvent e) {
// TODO Auto-generated method stub
}
public void windowClosing(WindowEvent e) {
// TODO Auto-generated method stub
println("close");
f.setVisible(false);
}
public void windowDeactivated(WindowEvent e) {
// TODO Auto-generated method stub
}
public void windowDeiconified(WindowEvent e) {
// TODO Auto-generated method stub
}
public void windowIconified(WindowEvent e) {
// TODO Auto-generated method stub
}
public void windowOpened(WindowEvent e) {
// TODO Auto-generated method stub
}
});

This should work.

8bit_biker

Re: Re: Closing second window by button event

6 months ago

Hi ramin,

Thank you very much for your soon reply! I'm trying to understand what you have suggested... but for me it's very hard doing it. The first thing that sounds strange to me is the manner in which is written... Could you explain to me??

Have you test your code (because for me this does not work)?

This is my new code:

import controlP5.*;
import processing.serial.*;
PFrame f;
secondApplet s;
ControlP5 cp5;
Serial serial;
Serial myPort;
ListBox l;
void setup() {
size(320, 240);
}
void draw() {
background(0, 255, 0);
fill(255);
}
public class PFrame extends Frame {
public PFrame() {
setBounds(600, 300, 400, 300);
s = new secondApplet();
add(s);
s.init();
show();
}
}
public class secondApplet extends PApplet {
Frame f;
public void setup() {
size(400, 300);
cp5 = new ControlP5(this);
cp5.addBang("Close")
.setPosition(140, 190)
.setSize(50, 20)
.getCaptionLabel().align(ControlP5.CENTER, ControlP5.CENTER)
;
f = (Frame)getAccessibleContext().getAccessibleParent();
f.addWindowListener(new WindowListener() {
public void windowActivated(WindowEvent arg0) {
// TODO Auto-generated method stub
}
public void windowClosed(WindowEvent e) {
// TODO Auto-generated method stub
}
public void windowClosing(WindowEvent e) {
// TODO Auto-generated method stub
println("close");
f.setVisible(false);
}
public void windowDeactivated(WindowEvent e) {
// TODO Auto-generated method stub
}
public void windowDeiconified(WindowEvent e) {
// TODO Auto-generated method stub
}
public void windowIconified(WindowEvent e) {
// TODO Auto-generated method stub
}
public void windowOpened(WindowEvent e) {
// TODO Auto-generated method stub
}
});
}
public void draw() {
background(255, 0, 0);
}
}
void keyPressed() {
if (key==' ') {
key=0;
PFrame f = new PFrame();
s.background(0, 0, 255);
s.fill(100);
s.rect(10, 20, frameCount, 0, 10);
s.redraw();
}
}

And this is the warning i get:

"The method addWindowListener(WindowListener) in the type Window is not applicable for the arguments"

I think i could have copied the code badly. Thank you in advance!

ramin

Re: Closing second window by button event

6 months ago

hey,

I tried it in the externalFrame or-something-example of the ControlP5 library.

The code was correct, it was only missing the import of WindowEvent, which is now done with

import java.awt.event.*;

which imports all classes in the event package (WindowListener and WindowEvent is what we need)

The error didnt make that clear.

Since your 2nd Applet is in a Frame, I added the Listener stuff to that class instead of getting the getAccessibleParent.

In General what we deal here with are WindowListeners, which can be given to Windows to specify what happens, when a user interact with a window... what you need to pass to a Window (Frame inherits from Window) is a class which implements the WindowListener Interface.

But instead of doing that you can write an anonymous class.

So instead of having something like

class MyListener implements WindowListener {
....
// all windowListener methods must be in here
}

and passind this to the frame...

MyListener listener = new MyListener();
f.addWindowListener(listener);

we can do write a anonymous class

f.addWindowListener(new WindowListener() {
// all windowListener methods must be in here
});

here is the full code: (Serial stuff is gone, cause it doesnt run on my machine)

import controlP5.*;
import java.awt.*;
import java.awt.event.*;
PFrame f;
secondApplet s;
ControlP5 cp5;
ListBox l;
void setup() {
size(320, 240);
f = new PFrame();
}
void draw() {
background(0, 255, 0);
fill(255);
}
public class PFrame extends Frame {
public PFrame() {
setBounds(600, 300, 400, 300);
s = new secondApplet();
add(s);
s.init();
show();
this.addWindowListener(new WindowListener() {
public void windowActivated(WindowEvent arg0) {
}
public void windowClosed(WindowEvent e) {
}
public void windowClosing(WindowEvent e) {
println("close");
f.setVisible(false);
}
public void windowDeactivated(WindowEvent e) {
}
public void windowDeiconified(WindowEvent e) {
}
public void windowIconified(WindowEvent e) {
}
public void windowOpened(WindowEvent e) {
}
}
);
}
}
public class secondApplet extends PApplet {
Frame f;
public void setup() {
size(400, 300);
cp5 = new ControlP5(this);
cp5.addBang("Close")
.setPosition(140, 190)
.setSize(50, 20)
.getCaptionLabel().align(ControlP5.CENTER, ControlP5.CENTER)
;
}
public void draw() {
background(255, 0, 0);
}
}
void keyPressed() {
if (key==' ') {
key=0;
PFrame f = new PFrame();
s.background(0, 0, 255);
s.fill(100);
s.rect(10, 20, frameCount, 0, 10);
s.redraw();
}
}

8bit_biker

Re: Closing second window by button event

6 months ago

Hi ramin!

This seems to work to me! Except for two thing:

1) the second window is always open instead the opening should depend on key-pressed event (key==' '): why??

2) the "Close" button still does not work, but I'm glad i can close the second window by pressing the "x" button of the titlebar.

I would like to thank you a lot for your precious help!!!Really appreciated!!

Best regards.

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