Setting content of my `UI` subclass in Vaadin Flow web app
In Vaadin Flow, writing a subclass of UI class is no longer necessary. Yet the page of the manual on Differences Between V10 and V8 Applications suggests we are free to do so.
The problem: The UI class in Flow has no UI::setContent method.
This usual line of code in our UI::init method fails in Flow:
this.setContent( layout ); // <--- No method `setContent` found in Flow
➥ How do we set the content to be displayed within our UI subclass at runtime?
Here is my code, with the line of setContent that fails.
package com.acme;
import com.vaadin.flow.component.UI;
import com.vaadin.flow.component.orderedlayout.VerticalLayout;
import com.vaadin.flow.server.VaadinRequest;
import com.vaadin.flow.server.VaadinServlet;
import com.vaadin.flow.server.VaadinServletConfiguration;
import javax.servlet.annotation.WebServlet;
public class MyUI extends UI {
protected void init ( VaadinRequest request ) {
VerticalLayout layout = new VerticalLayout();
this.setContent( layout );
}
@WebServlet (
urlPatterns = "/*",
name = "myservlet",
asyncSupported = true
)
// The UI configuration is optional
@VaadinServletConfiguration (
ui = MyUI.class,
productionMode = false
)
public class MyServlet extends VaadinServlet {
}
}
java user-interface vaadin vaadin-flow
asked Nov 12 '18 at 23:05
Basil BourqueBasil Bourque
108k25369534
add a comment |
In Vaadin Flow, writing a subclass of UI class is no longer necessary. Yet the page of the manual on Differences Between V10 and V8 Applications suggests we are free to do so.
The problem: The UI class in Flow has no UI::setContent method.
This usual line of code in our UI::init method fails in Flow:
this.setContent( layout ); // <--- No method `setContent` found in Flow
➥ How do we set the content to be displayed within our UI subclass at runtime?
Here is my code, with the line of setContent that fails.
package com.acme;
import com.vaadin.flow.component.UI;
import com.vaadin.flow.component.orderedlayout.VerticalLayout;
import com.vaadin.flow.server.VaadinRequest;
import com.vaadin.flow.server.VaadinServlet;
import com.vaadin.flow.server.VaadinServletConfiguration;
import javax.servlet.annotation.WebServlet;
public class MyUI extends UI {
protected void init ( VaadinRequest request ) {
VerticalLayout layout = new VerticalLayout();
this.setContent( layout );
}
@WebServlet (
urlPatterns = "/*",
name = "myservlet",
asyncSupported = true
)
// The UI configuration is optional
@VaadinServletConfiguration (
ui = MyUI.class,
productionMode = false
)
public class MyServlet extends VaadinServlet {
}
}
java user-interface vaadin vaadin-flow
asked Nov 12 '18 at 23:05
Basil BourqueBasil Bourque
108k25369534
On a related note: Handling login with a Vaadin Flow webapp, across all layouts globally and across “route” URLs
– Basil Bourque
Nov 12 '18 at 23:59
add a comment |
In Vaadin Flow, writing a subclass of UI class is no longer necessary. Yet the page of the manual on Differences Between V10 and V8 Applications suggests we are free to do so.
The problem: The UI class in Flow has no UI::setContent method.
This usual line of code in our UI::init method fails in Flow:
this.setContent( layout ); // <--- No method `setContent` found in Flow
➥ How do we set the content to be displayed within our UI subclass at runtime?
Here is my code, with the line of setContent that fails.
package com.acme;
import com.vaadin.flow.component.UI;
import com.vaadin.flow.component.orderedlayout.VerticalLayout;
import com.vaadin.flow.server.VaadinRequest;
import com.vaadin.flow.server.VaadinServlet;
import com.vaadin.flow.server.VaadinServletConfiguration;
import javax.servlet.annotation.WebServlet;
public class MyUI extends UI {
protected void init ( VaadinRequest request ) {
VerticalLayout layout = new VerticalLayout();
this.setContent( layout );
}
@WebServlet (
urlPatterns = "/*",
name = "myservlet",
asyncSupported = true
)
// The UI configuration is optional
@VaadinServletConfiguration (
ui = MyUI.class,
productionMode = false
)
public class MyServlet extends VaadinServlet {
}
}
java user-interface vaadin vaadin-flow
asked Nov 12 '18 at 23:05
Basil BourqueBasil Bourque
108k25369534
In Vaadin Flow, writing a subclass of UI class is no longer necessary. Yet the page of the manual on Differences Between V10 and V8 Applications suggests we are free to do so.
The problem: The UI class in Flow has no UI::setContent method.
This usual line of code in our UI::init method fails in Flow:
this.setContent( layout ); // <--- No method `setContent` found in Flow
➥ How do we set the content to be displayed within our UI subclass at runtime?
Here is my code, with the line of setContent that fails.
package com.acme;
import com.vaadin.flow.component.UI;
import com.vaadin.flow.component.orderedlayout.VerticalLayout;
import com.vaadin.flow.server.VaadinRequest;
import com.vaadin.flow.server.VaadinServlet;
import com.vaadin.flow.server.VaadinServletConfiguration;
import javax.servlet.annotation.WebServlet;
public class MyUI extends UI {
protected void init ( VaadinRequest request ) {
VerticalLayout layout = new VerticalLayout();
this.setContent( layout );
}
@WebServlet (
urlPatterns = "/*",
name = "myservlet",
asyncSupported = true
)
// The UI configuration is optional
@VaadinServletConfiguration (
ui = MyUI.class,
productionMode = false
)
public class MyServlet extends VaadinServlet {
}
}
java user-interface vaadin vaadin-flow
java user-interface vaadin vaadin-flow
asked Nov 12 '18 at 23:05
Basil BourqueBasil Bourque
108k25369534
asked Nov 12 '18 at 23:05
Basil BourqueBasil Bourque
108k25369534
asked Nov 12 '18 at 23:05
Basil BourqueBasil Bourque
108k25369534
asked Nov 12 '18 at 23:05
Basil BourqueBasil Bourque
108k25369534
asked Nov 12 '18 at 23:05
Basil BourqueBasil Bourque
108k25369534
108k25369534
On a related note: Handling login with a Vaadin Flow webapp, across all layouts globally and across “route” URLs
– Basil Bourque
Nov 12 '18 at 23:59
add a comment |
On a related note: Handling login with a Vaadin Flow webapp, across all layouts globally and across “route” URLs
– Basil Bourque
Nov 12 '18 at 23:59
On a related note: Handling login with a Vaadin Flow webapp, across all layouts globally and across “route” URLs
– Basil Bourque
Nov 12 '18 at 23:59
On a related note: Handling login with a Vaadin Flow webapp, across all layouts globally and across “route” URLs
– Basil Bourque
Nov 12 '18 at 23:59
add a comment |
1 Answer
1
active
oldest
votes
The UI is a component itself and implements HasComponents. Hence, you can simply call add(Component...) method to fill it with components.
answered Nov 13 '18 at 15:49
Steffen HarbichSteffen Harbich
1,8231636
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
The UI is a component itself and implements HasComponents. Hence, you can simply call add(Component...) method to fill it with components.
answered Nov 13 '18 at 15:49
Steffen HarbichSteffen Harbich
1,8231636
add a comment |
The UI is a component itself and implements HasComponents. Hence, you can simply call add(Component...) method to fill it with components.
answered Nov 13 '18 at 15:49
Steffen HarbichSteffen Harbich
1,8231636
add a comment |
The UI is a component itself and implements HasComponents. Hence, you can simply call add(Component...) method to fill it with components.
answered Nov 13 '18 at 15:49
Steffen HarbichSteffen Harbich
1,8231636
The UI is a component itself and implements HasComponents. Hence, you can simply call add(Component...) method to fill it with components.
answered Nov 13 '18 at 15:49
Steffen HarbichSteffen Harbich
1,8231636
answered Nov 13 '18 at 15:49
Steffen HarbichSteffen Harbich
1,8231636
answered Nov 13 '18 at 15:49
Steffen HarbichSteffen Harbich
1,8231636
answered Nov 13 '18 at 15:49
Steffen HarbichSteffen Harbich
1,8231636
1,8231636
add a comment |
add a comment |
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On a related note: Handling login with a Vaadin Flow webapp, across all layouts globally and across “route” URLs
– Basil Bourque
Nov 12 '18 at 23:59