我有一個TreeView它看起來像這樣 JavaFX的:我的根節點不能正常工作[再次]
讓假設1,2,3被稱爲根和4,5,6,7-被稱爲座標。每個座標生成2個矩形,這些矩形在根上水平顯示。這裏是代碼
import javafx.application.Application;
import javafx.application.Platform;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.CheckBox;
import javafx.scene.control.ContextMenu;
import javafx.scene.control.Label;
import javafx.scene.control.MenuItem;
import javafx.scene.control.TextField;
import javafx.scene.control.TreeItem;
import javafx.scene.control.TreeView;
import javafx.scene.control.cell.TextFieldTreeCell;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;
import java.util.HashMap;
import java.util.Map;
public class Main extends Application {
private static int rootNr = 0;
private static int coordinateNr = 0;
public static void main(String[] args) {
launch(args);
}
static final Map<TreeItem<String>, BorderPane> map = new HashMap<>();
@Override
public void start(Stage primaryStage) {
BorderPane root = new BorderPane();
TreeItem<String> tree = new TreeItem<>("Main System");
TreeItem<String> item1 = new TreeItem<>("Roots");
TreeView<String> treeView = new TreeView<>(tree);
treeView.setOnMouseClicked((event) -> {
TreeItem<String> treeItem = treeView.getSelectionModel().getSelectedItem();
if (treeItem.getChildren().stream().anyMatch(child -> child.getValue().startsWith("C"))) {
root.setCenter(getRootsPanel(treeItem.getValue()));
}else {
root.setCenter(map.get(treeItem));
}
});
treeView.setCellFactory(p -> new AddMenuTreeCell());
tree.setExpanded(true);
root.setLeft(treeView);
tree.getChildren().add(item1);
Scene scene = new Scene(root, 700, 500);
primaryStage.setTitle("Tree View");
primaryStage.setScene(scene);
primaryStage.show();
}
private static class AddMenuTreeCell extends TextFieldTreeCell<String> {
private ContextMenu menu = new ContextMenu();
private TextField textField;
public AddMenuTreeCell() {
MenuItem newitem1 = new MenuItem("Insert Roots");
MenuItem newitem2 = new MenuItem("Insert Coordinates");
menu.getItems().addAll(newitem1, newitem2);
newitem1.setOnAction(arg0 -> {
TreeItem<String> item3 = new TreeItem<>("Root" + rootNr++);
getTreeItem().getChildren().add(item3);
});
newitem2.setOnAction(arg0 -> {
TreeItem<String> newLeaf = new TreeItem<>("Coordinates" + coordinateNr++);
TreeItem<String> uxItem1 = new TreeItem<>("X");
map.put(uxItem1, getrightPane1());
TreeItem<String> uyItem1 = new TreeItem<>("y");
map.put(uyItem1, getrightPane1());
newLeaf.getChildren().add(uxItem1);
newLeaf.getChildren().add(uyItem1);
getTreeItem().getChildren().add(newLeaf);
});
}
@Override
public void updateItem(String item, boolean empty) {
super.updateItem(item, empty);
if (empty) {
setText(null);
setGraphic(null);
} else {
if (!isEditing()) {
setText(item);
setGraphic(getTreeItem().getGraphic());
if (!(getTreeItem().isLeaf() && getTreeItem().getParent() == null)) {
setContextMenu(menu);
}
}
}
}
}
private static BorderPane getrightPane1() {
TextField textf1 = new TextField();
TextField textf2 = new TextField();
BorderPane root1 = new BorderPane();
VBox vbox = new VBox(20);
vbox.setPadding(new Insets(10));
HBox h1 = new HBox(7);
HBox h2 = new HBox(7);
textf1.setPrefWidth(100);
textf1.setPromptText("Enter Height");
textf1.setOnKeyReleased(event -> {
if (textf1.getText().length() > 0 && textf2.getText().length() > 0) {
Rectangle rect1 = new Rectangle();
rect1.setHeight(Double.parseDouble(textf1.getText()));
rect1.setWidth(Double.parseDouble(textf2.getText()));
rect1.setFill(null);
rect1.setStroke(Color.BLUE);
root1.setCenter(rect1);
}
});
textf2.setPrefWidth(100);
textf2.setPromptText("Enter Width");
textf2.setOnKeyReleased(event -> {
if (textf1.getText().length() > 0 && textf2.getText().length() > 0) {
Rectangle rect2 = new Rectangle();
rect2.setHeight(Double.parseDouble(textf1.getText()));
rect2.setWidth(Double.parseDouble(textf2.getText()));
rect2.setFill(null);
rect2.setStroke(Color.RED);
root1.setCenter(rect2);
}
});
if (textf1.getText().length() > 0 && textf2.getText().length() > 0 && root1.getCenter() == null) {
Rectangle rect = new Rectangle();
rect.setHeight(Double.parseDouble(textf1.getText()));
rect.setWidth(Double.parseDouble(textf2.getText()));
rect.setFill(null);
rect.setStroke(Color.RED);
root1.setCenter(rect);
}
h1.getChildren().addAll(new Label("Y:"), textf1);
h2.getChildren().addAll(new Label("X:"), textf2);
vbox.getChildren().addAll(h1, h2);
root1.setLeft(vbox);
return root1;
}
private static BorderPane getRootsPanel(String root) {
BorderPane root2 = new BorderPane();
HBox hbox = new HBox(10);
hbox.setPadding(new Insets(40));
hbox.setAlignment(Pos.TOP_CENTER);
for (Map.Entry<TreeItem<String>, BorderPane> entry : map.entrySet()) {
if (entry.getKey().getParent().getParent().getValue().equals(root)) {
Rectangle rect1 = (Rectangle) entry.getValue().getCenter();
if (rect1 != null) {
Rectangle rect2 = new Rectangle();
rect2.setWidth(rect1.getWidth());
rect2.setHeight(rect1.getHeight());
rect2.setFill(rect1.getFill());
rect2.setStroke(rect1.getStroke());
Platform.runLater(() -> hbox.getChildren().addAll(rect2));
}
}
}
Platform.runLater(() -> root2.setLeft(hbox));
return root2;
}
}
用這個代碼用戶可以使樹顯示在圖片中。 2和3(稱爲根節點)將顯示4個矩形,因爲每個內部具有2個座標,第1個節點應該水平顯示總共8個矩形。但我的第一個節點什麼也沒有顯示那就是問題所在。
[注:以前我問過這個問題,但沒有得到任何答覆。以前我多次編輯這個問題,我沒有太多的聲譽把獎金(因爲我是新的堆棧溢出)]
請我需要幫助解決這個問題。
謝謝
你的問題是不是5分鐘,我會玩它,讓你知道... –