[英]TreeItem is Overwritten in JavaFX. How to solve this?
每次我添加一個新類時,Treeitem 都會被覆蓋。 如何解決這個問題?
同時添加一個新的對象treeitem應該是動態增加試過的:
這是一個示例代碼,抱歉命名錯誤。提前致謝
用--------標記出問題的地方
窗格類.java
public class PanesClass extends Application {
ObservableList<Connections> cList = FXCollections.observableArrayList();
public static void main(String[] args) {
launch(args);
}
@SuppressWarnings("all")@Override
public void start(Stage primaryStage) throws Exception {
NewConnection newConnection = new NewConnection();
SplitPane root = new SplitPane();
AnchorPane first = new AnchorPane();
AnchorPane second = new AnchorPane();
TreeTableView activeConnections = new TreeTableView();
HBox buttonBox = new HBox();
BorderPane topBar = new BorderPane();
Button nConnection = new Button("+");
Button deleteConnection = new Button("X");
Button connect = new Button("Connect");
buttonBox.setSpacing(10);
buttonBox.getChildren().addAll(nConnection, deleteConnection, connect);
topBar.setTop(buttonBox);
TreeTableColumn<String, Connections > cNameColoumn = new TreeTableColumn<>("Name");
cNameColoumn.setCellValueFactory(new TreeItemPropertyValueFactory<>("cname"));
TreeTableColumn<String, Connections> cStatusColoumn = new TreeTableColumn<>("Status");
cStatusColoumn.setCellValueFactory(new TreeItemPropertyValueFactory<>("cstatus"));
activeConnections.getColumns().addAll(cNameColoumn, cStatusColoumn);
activeConnections.setLayoutX(20);
activeConnections.setLayoutY(40);
activeConnections.setColumnResizePolicy(TreeTableView.CONSTRAINED_RESIZE_POLICY);
first.getChildren().addAll(topBar, activeConnections);
root.getItems().addAll(first, second);
Scene sc = new Scene(root, 600, 480);
primaryStage.setScene(sc);
primaryStage.show();
nConnection.setOnAction(new EventHandler<ActionEvent>() {@Override
public void handle(ActionEvent event) {
newConnection.getConnection(activeConnections);
}
});
}
}
新連接.java
public class NewConnection {
Connections connection = null;
ObservableList<Connections> cList = FXCollections.observableArrayList();
PanesClass panesClass = new PanesClass();
TreeItem cItem = null;
TreeItem nItem = null;
public void getConnection(TreeTableView<Connections> activeConnections) {
Stage secondaryStage = new Stage();
VBox root = new VBox();
GridPane cDetails = new GridPane();
HBox actionButtons = new HBox();
Button connect = new Button("Connect");
Button save = new Button("Save");
Button cancel = new Button("Cancel");
actionButtons.getChildren().addAll(connect, save, cancel);
actionButtons.setSpacing(10);
Label name = new Label("Username : ");
cDetails.add(name, 0, 0);
TextField uName = new TextField();
cDetails.setHgrow(uName, Priority.ALWAYS);
cDetails.add(uName, 1, 0);
Label password = new Label("Password : ");
cDetails.add(password, 0, 1);
TextField pwd = new TextField();
cDetails.add(pwd, 1, 1);
Label urllink = new Label("URL : ");
cDetails.add(urllink, 0, 2);
TextField url = new TextField();
cDetails.add(url, 1, 2);
cDetails.setVgap(10);
cDetails.setStyle("-fx-padding: 10;" + "-fx-border-style: solid inside;" + "-fx-border-width: 1;" + "-fx-border-insets: 5;" + "-fx-border-radius: 5;" + "-fx-border-color: black;");
root.getChildren().addAll(cDetails, actionButtons);
Scene sc = new Scene(root, 500, 200);
secondaryStage.setScene(sc);
secondaryStage.initModality(Modality.APPLICATION_MODAL);
secondaryStage.show();
save.setOnAction(new EventHandler<ActionEvent>() {
//*-----------------------------------------------------------------------*
@Override
public void handle(ActionEvent event) {
cItem = getitem(cItem);
activeConnections.setRoot(cItem);
activeConnections.setShowRoot(false);
secondaryStage.close();
}
private TreeItem getitem(TreeItem cItem) {
cList.add(new Connections(uName.getText()));
System.out.println(cList);
for (Connections temp: cList) {
System.out.println(temp);
nItem = new TreeItem<Connections>(temp);
System.out.println(nItem);
cItem.getChildren().add(nItem);
}
return cItem;
}
});
System.out.println(cList);
}
}
連接.java
public class Connections {
private String cname = null;
private String cstatus = null;
private String cpwd = null;
private String curl = null;
public Connections() {
}
public Connections(String cname, String cpwd, String curl) {
super();
this.cname = cname;
this.cpwd = cpwd;
this.curl = curl;
}
public Connections(String cname, String cstatus) {
super();
this.cname = cname;
this.cstatus = cstatus;
}
public String getCpwd() {
return cpwd;
}
public void setCpwd(String cpwd) {
this.cpwd = cpwd;
}
public String getCurl() {
return curl;
}
public void setCurl(String curl) {
this.curl = curl;
}
public String getCname() {
return cname;
}
public void setCname(String cname) {
this.cname = cname;
}
public String getCstatus() {
return cstatus;
}
public void setCstatus(String cstatus) {
this.cstatus = cstatus;
}
@Override
public String toString() {
return "Connections [cname=" + cname + ", cstatus=" + cstatus + ", cpwd=" + cpwd + ", curl=" + curl + "]";
}
}
您不是在填充樹,而是在創建新項目而不將它們添加到樹中。 首先,您需要創建一個根:
// Instead of this line
// TreeItem nItem = null;
TreeItem rootItem = new TreeItem();
然后:
activeConnections.setRoot(rootItem);
save.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent event) {
// clear old connections
rootItem.getChildren().clear();
// Add new connection
cList.add(new Connections(uName.getText(), pwd.getText(), url.getText()));
// create new items and add them to rootItem
for (Connections temp : cList) {
rootItem.getChildren().add(new TreeItem<Connections>(temp));
}
secondaryStage.close();
event.consume();
}
});
注意:如果您沒有其他理由保留cList
,您可以將其刪除並直接添加新項目(無需每次都清除和重新生成項目):
save.setOnAction(event -> {
Connections newConnection = new Connections(uName.getText(), pwd.getText(), url.getText());
rootItem.getChildren().add(new TreeItem<>(newConnection));
secondaryStage.close();
event.consume();
});
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