JavaFX: ComboBox using Object property
Lets say I have a class:
public class Dummy {
private String name;
private String someOtherProperty;
public String getName() {
return name;
}
}
I have an ArrayList of this class ArrayList<Dummy> dummyList;
Can I create a JavaFX ComboBox with the Object name property as selection options without creating a new ArrayList<String> with the object names?
Pseudocode:
ObservableList<Dummy> dummyO = FXCollections.observableArrayList(dummyList);
final ComboBox combo = new ComboBox(dummyO); // -> here dummyO.name?
(Optional) Ideally, while the name should be displayed, when an option has been selected, the combo.getValue() should return me the reference of the selected Dummy and not only the name. Is that possible?
java arraylist javafx combobox
asked Dec 17 '16 at 17:10
sandboxj
409517
add a comment |
Lets say I have a class:
public class Dummy {
private String name;
private String someOtherProperty;
public String getName() {
return name;
}
}
I have an ArrayList of this class ArrayList<Dummy> dummyList;
Can I create a JavaFX ComboBox with the Object name property as selection options without creating a new ArrayList<String> with the object names?
Pseudocode:
ObservableList<Dummy> dummyO = FXCollections.observableArrayList(dummyList);
final ComboBox combo = new ComboBox(dummyO); // -> here dummyO.name?
(Optional) Ideally, while the name should be displayed, when an option has been selected, the combo.getValue() should return me the reference of the selected Dummy and not only the name. Is that possible?
java arraylist javafx combobox
asked Dec 17 '16 at 17:10
sandboxj
409517
add a comment |
Lets say I have a class:
public class Dummy {
private String name;
private String someOtherProperty;
public String getName() {
return name;
}
}
I have an ArrayList of this class ArrayList<Dummy> dummyList;
Can I create a JavaFX ComboBox with the Object name property as selection options without creating a new ArrayList<String> with the object names?
Pseudocode:
ObservableList<Dummy> dummyO = FXCollections.observableArrayList(dummyList);
final ComboBox combo = new ComboBox(dummyO); // -> here dummyO.name?
(Optional) Ideally, while the name should be displayed, when an option has been selected, the combo.getValue() should return me the reference of the selected Dummy and not only the name. Is that possible?
java arraylist javafx combobox
asked Dec 17 '16 at 17:10
sandboxj
409517
Lets say I have a class:
public class Dummy {
private String name;
private String someOtherProperty;
public String getName() {
return name;
}
}
I have an ArrayList of this class ArrayList<Dummy> dummyList;
Can I create a JavaFX ComboBox with the Object name property as selection options without creating a new ArrayList<String> with the object names?
Pseudocode:
ObservableList<Dummy> dummyO = FXCollections.observableArrayList(dummyList);
final ComboBox combo = new ComboBox(dummyO); // -> here dummyO.name?
(Optional) Ideally, while the name should be displayed, when an option has been selected, the combo.getValue() should return me the reference of the selected Dummy and not only the name. Is that possible?
java arraylist javafx combobox
java arraylist javafx combobox
asked Dec 17 '16 at 17:10
sandboxj
409517
asked Dec 17 '16 at 17:10
sandboxj
409517
edited Dec 17 '16 at 23:40
asked Dec 17 '16 at 17:10
sandboxj
409517
asked Dec 17 '16 at 17:10
sandboxj
409517
asked Dec 17 '16 at 17:10
sandboxj
409517
409517
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
You can use a custom cellFactory to display the items in a way that suits your needs:
ComboBox<Dummy> comboBox = ...
Callback<ListView<Dummy>, ListCell<Dummy>> factory = lv -> new ListCell<Dummy>() {
@Override
protected void updateItem(Dummy item, boolean empty) {
super.updateItem(item, empty);
setText(empty ? "" : item.getName());
}
};
comboBox.setCellFactory(factory);
comboBox.setButtonCell(factory.call(null));
answered Dec 18 '16 at 12:00
fabian
50.1k115171
add a comment |
I'm assuming the ComboBox you're referring to is this: http://docs.oracle.com/javase/8/javafx/api/javafx/scene/control/ComboBoxBase.html. As getValue() is public, you can do:
public class MyComboBox<T> extends ComboBox<T> {
private final Dummy dummy;
public MyComboBox(Dummy dummy) {
this.dummy = dummy;
}
public T getValue() {
return dummy.getName();
}
}
answered Dec 17 '16 at 18:02
Roberto Attias
1,7151517
Thank you. While I do not believe you have directly answered my question of how to display a property in the ComboBox and not the object itself, creating a custom ComboBox class is a good suggestion!
– sandboxj
Dec 17 '16 at 22:50
1
Why would you want to do this? This would replace the type of object returned fromgetValuetoString, which would lead to aClassCastExceptionin many cases. Furthermore you're returning the name of the sameDummyregardless of the values selected in theComboBox. And last but not leastgetValue()isfinaland thus cannot be overriden.
– fabian
Dec 18 '16 at 12:07
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
You can use a custom cellFactory to display the items in a way that suits your needs:
ComboBox<Dummy> comboBox = ...
Callback<ListView<Dummy>, ListCell<Dummy>> factory = lv -> new ListCell<Dummy>() {
@Override
protected void updateItem(Dummy item, boolean empty) {
super.updateItem(item, empty);
setText(empty ? "" : item.getName());
}
};
comboBox.setCellFactory(factory);
comboBox.setButtonCell(factory.call(null));
answered Dec 18 '16 at 12:00
fabian
50.1k115171
add a comment |
You can use a custom cellFactory to display the items in a way that suits your needs:
ComboBox<Dummy> comboBox = ...
Callback<ListView<Dummy>, ListCell<Dummy>> factory = lv -> new ListCell<Dummy>() {
@Override
protected void updateItem(Dummy item, boolean empty) {
super.updateItem(item, empty);
setText(empty ? "" : item.getName());
}
};
comboBox.setCellFactory(factory);
comboBox.setButtonCell(factory.call(null));
answered Dec 18 '16 at 12:00
fabian
50.1k115171
add a comment |
You can use a custom cellFactory to display the items in a way that suits your needs:
ComboBox<Dummy> comboBox = ...
Callback<ListView<Dummy>, ListCell<Dummy>> factory = lv -> new ListCell<Dummy>() {
@Override
protected void updateItem(Dummy item, boolean empty) {
super.updateItem(item, empty);
setText(empty ? "" : item.getName());
}
};
comboBox.setCellFactory(factory);
comboBox.setButtonCell(factory.call(null));
answered Dec 18 '16 at 12:00
fabian
50.1k115171
You can use a custom cellFactory to display the items in a way that suits your needs:
ComboBox<Dummy> comboBox = ...
Callback<ListView<Dummy>, ListCell<Dummy>> factory = lv -> new ListCell<Dummy>() {
@Override
protected void updateItem(Dummy item, boolean empty) {
super.updateItem(item, empty);
setText(empty ? "" : item.getName());
}
};
comboBox.setCellFactory(factory);
comboBox.setButtonCell(factory.call(null));
answered Dec 18 '16 at 12:00
fabian
50.1k115171
answered Dec 18 '16 at 12:00
fabian
50.1k115171
answered Dec 18 '16 at 12:00
fabian
50.1k115171
answered Dec 18 '16 at 12:00
fabian
50.1k115171
50.1k115171
add a comment |
add a comment |
I'm assuming the ComboBox you're referring to is this: http://docs.oracle.com/javase/8/javafx/api/javafx/scene/control/ComboBoxBase.html. As getValue() is public, you can do:
public class MyComboBox<T> extends ComboBox<T> {
private final Dummy dummy;
public MyComboBox(Dummy dummy) {
this.dummy = dummy;
}
public T getValue() {
return dummy.getName();
}
}
answered Dec 17 '16 at 18:02
Roberto Attias
1,7151517
Thank you. While I do not believe you have directly answered my question of how to display a property in the ComboBox and not the object itself, creating a custom ComboBox class is a good suggestion!
– sandboxj
Dec 17 '16 at 22:50
1
Why would you want to do this? This would replace the type of object returned fromgetValuetoString, which would lead to aClassCastExceptionin many cases. Furthermore you're returning the name of the sameDummyregardless of the values selected in theComboBox. And last but not leastgetValue()isfinaland thus cannot be overriden.
– fabian
Dec 18 '16 at 12:07
add a comment |
I'm assuming the ComboBox you're referring to is this: http://docs.oracle.com/javase/8/javafx/api/javafx/scene/control/ComboBoxBase.html. As getValue() is public, you can do:
public class MyComboBox<T> extends ComboBox<T> {
private final Dummy dummy;
public MyComboBox(Dummy dummy) {
this.dummy = dummy;
}
public T getValue() {
return dummy.getName();
}
}
answered Dec 17 '16 at 18:02
Roberto Attias
1,7151517
Thank you. While I do not believe you have directly answered my question of how to display a property in the ComboBox and not the object itself, creating a custom ComboBox class is a good suggestion!
– sandboxj
Dec 17 '16 at 22:50
1
Why would you want to do this? This would replace the type of object returned fromgetValuetoString, which would lead to aClassCastExceptionin many cases. Furthermore you're returning the name of the sameDummyregardless of the values selected in theComboBox. And last but not leastgetValue()isfinaland thus cannot be overriden.
– fabian
Dec 18 '16 at 12:07
add a comment |
I'm assuming the ComboBox you're referring to is this: http://docs.oracle.com/javase/8/javafx/api/javafx/scene/control/ComboBoxBase.html. As getValue() is public, you can do:
public class MyComboBox<T> extends ComboBox<T> {
private final Dummy dummy;
public MyComboBox(Dummy dummy) {
this.dummy = dummy;
}
public T getValue() {
return dummy.getName();
}
}
answered Dec 17 '16 at 18:02
Roberto Attias
1,7151517
I'm assuming the ComboBox you're referring to is this: http://docs.oracle.com/javase/8/javafx/api/javafx/scene/control/ComboBoxBase.html. As getValue() is public, you can do:
public class MyComboBox<T> extends ComboBox<T> {
private final Dummy dummy;
public MyComboBox(Dummy dummy) {
this.dummy = dummy;
}
public T getValue() {
return dummy.getName();
}
}
answered Dec 17 '16 at 18:02
Roberto Attias
1,7151517
answered Dec 17 '16 at 18:02
Roberto Attias
1,7151517
answered Dec 17 '16 at 18:02
Roberto Attias
1,7151517
answered Dec 17 '16 at 18:02
Roberto Attias
1,7151517
1,7151517
Thank you. While I do not believe you have directly answered my question of how to display a property in the ComboBox and not the object itself, creating a custom ComboBox class is a good suggestion!
– sandboxj
Dec 17 '16 at 22:50
1
Why would you want to do this? This would replace the type of object returned fromgetValuetoString, which would lead to aClassCastExceptionin many cases. Furthermore you're returning the name of the sameDummyregardless of the values selected in theComboBox. And last but not leastgetValue()isfinaland thus cannot be overriden.
– fabian
Dec 18 '16 at 12:07
add a comment |
Thank you. While I do not believe you have directly answered my question of how to display a property in the ComboBox and not the object itself, creating a custom ComboBox class is a good suggestion!
– sandboxj
Dec 17 '16 at 22:50
1
Why would you want to do this? This would replace the type of object returned fromgetValuetoString, which would lead to aClassCastExceptionin many cases. Furthermore you're returning the name of the sameDummyregardless of the values selected in theComboBox. And last but not leastgetValue()isfinaland thus cannot be overriden.
– fabian
Dec 18 '16 at 12:07
Thank you. While I do not believe you have directly answered my question of how to display a property in the ComboBox and not the object itself, creating a custom ComboBox class is a good suggestion!
– sandboxj
Dec 17 '16 at 22:50
Thank you. While I do not believe you have directly answered my question of how to display a property in the ComboBox and not the object itself, creating a custom ComboBox class is a good suggestion!
– sandboxj
Dec 17 '16 at 22:50
1
1
Why would you want to do this? This would replace the type of object returned from
getValue to String, which would lead to a ClassCastException in many cases. Furthermore you're returning the name of the same Dummy regardless of the values selected in the ComboBox. And last but not least getValue() is final and thus cannot be overriden.– fabian
Dec 18 '16 at 12:07
Why would you want to do this? This would replace the type of object returned from
getValue to String, which would lead to a ClassCastException in many cases. Furthermore you're returning the name of the same Dummy regardless of the values selected in the ComboBox. And last but not least getValue() is final and thus cannot be overriden.– fabian
Dec 18 '16 at 12:07
add a comment |
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