Access Windows

[Ardak (Ardak Khassenov)]

How to open new URL from another subURL?[b]

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[Dmitri (Dmitri Livotov)]

@Ardak Khassenov

How to open new URL from another subURL?[b]

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Im sorry,but could you expain what needs to be achieved in more details, as Im afraid I did not understand it correctly. Do you want to open another Vaadin window from current Vaadin window or what does the “subUrl” mean ?

[Ardak (Ardak Khassenov)]

For example I’m pressing “some” button from the main page and enters to next URL . Opens URL mainpage/some/. In the page “some” I have for example “next” button and I want to enter to the next URL. as a result mainpage/some/next. So a new empty window appears. Is it understandable?

[Dmitri (Dmitri Livotov)]

if under one or another page you mean Vaadin windows, just use openUrl(…) method of the Window class - it will open any local top your app or external url. To open another Vaadin window you need to know it’s URL - use getURL() method of a Window class.

[Ardak (Ardak Khassenov)]

This is an example from the book Vaadin.

public class WindowTestApplication extends Application {
public void init() {
final Window main = new Window (“My Test Application”);
setMainWindow(main);
final Window mywindow = new Window(“Second Window”);
mywindow.setName(“mywindow”);
mywindow.addComponent(new Label(“Has content.”));
addWindow(mywindow);
}
}
main.addComponent(new Button(“Click to open new window”,
new Button.ClickListener() {
public void buttonClick(ClickEvent event) {
// Open the window.
main.open(new ExternalResource(mywindow.getURL()),
“_new”);
}
}));

It works ok, let’s assume that main page is window “main”, from above. I want to write code for “mywindow” window that it also opens new window. I apply this code for the “mywindow”, creating new button to process to next page, but it doesn’t works. The exception thrown is:
Cause: java.lang.RuntimeException: Internal problem getting window URL
Can you test this example for one more window.
thanx for help…

[Risto (Risto Yrjänä)]

It would be helpful if you could post the code that is causing the exception.

[Ardak (Ardak Khassenov)]

Here is the 1st class

package com.example.example;
import com.vaadin.ui.*;

public class ExampleApplication extends Application {

ExampleApplication1 e1;

@Override
public void init() {
	
	final Window main = new Window ("My Test Application");
	setMainWindow(main);

	e1 = new ExampleApplication1("second window");
	addWindow(e1.getW());
	main.addComponent(new Button("Click to open new window",
			new Button.ClickListener() {
			public void buttonClick(ClickEvent event) {
				main.open(new ExternalResource(e1.getU()));
			}
			}));
		}

}

Here is the 2nd class

package com.example.example;
import com.vaadin.ui.*;

public class ExampleApplication1 extends Application {
public final Window mywindow;
ExampleApplication2 e2;
@Override
public void init() {

}
public ExampleApplication1(String title){
	mywindow = new Window(title);
	mywindow.setName(title);
	setMainWindow(mywindow);
	
	e2 = new ExampleApplication2("window");
	addWindow(e2.getWi());
	
	Button b = new Button("BBBS");
	b.addListener(new Button.ClickListener() {
		public void buttonClick(ClickEvent event) {
			
			mywindow.open(new ExternalResource(e2.getUr()));
		}
		});
	mywindow.addComponent(b);
	
}
public Window getW() {
	return mywindow;
	
}
public URL getU(){
	return mywindow.getURL();
}

}

Here is the 3rd class

package com.example.example;
import com.vaadin.ui.*;

public class ExampleApplication2 extends Application {
public final Window mywind;

@Override
public void init() {
	
}
public ExampleApplication2(String title){
	mywind = new Window(title);
	mywind.setName(title);
	setMainWindow(mywind);
	
	mywind.addComponent(new Label("asdsadadsada"));
}

public Window getWi() {
	return mywind;
	
}
public URL getUr(){
	return mywind.getURL();
}

}

EXCEPTION IS


Caused by: java.lang.RuntimeException: Internal problem getting window URL, please report
at com.vaadin.ui.Window.getURL(Window.java:710)
at com.example.example.ExampleApplication2.getUr(ExampleApplication2.java:37)
at com.example.example.ExampleApplication1$1.buttonClick(ExampleApplication1.java:36)

[Risto (Risto Yrjänä)]

Maybe I don’t fully understand you purpose here, but do you really need that other application? If you want to change the whole view, you should try switching windows within one application. Or just switch the layout within one window. Also I suggest you read
chapter four
that deals with applications and windows.