[英]JavaFX - Drag and Drop TableCell
我有一個帶有單元格的TableView。 我的表格的工作方式類似於坐標系,而不是通常的表格。 單擊此處了解更多信息。
現在,我需要將一個單元拖放到另一個單元(移動)。
這是我的拖放代碼:
tableView.setOnDragDetected(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
Dragboard db = tableView.startDragAndDrop(TransferMode.MOVE);
ClipboardContent content = new ClipboardContent();
int x = tableView.getSelectionModel().getSelectedCells().get(0).getColumn();
int y = tableView.getSelectionModel().getSelectedCells().get(0).getRow();
for(Event e:eventList) {
if(e.getAblaufX() == x && e.getAblaufY() == y) {
//System.out.println("Event Abteilung: " + e.getAbteilung());
content.put(Config.SERIALIZED_MIME_TYPE, e.getId());
}
}
db.setContent(content);
event.consume();
}
});
tableView.setOnDragDropped(new EventHandler<DragEvent>() {
@Override
public void handle(DragEvent event) {
System.out.println("Drag Dropped!");
Dragboard db = event.getDragboard();
if (db.hasContent(Config.SERIALIZED_MIME_TYPE)) {
int draggedEventId = (Integer) db.getContent(Config.SERIALIZED_MIME_TYPE);
Event draggedEvent = null;
//System.out.println("Dragged Event ID: " + draggedEventId);
for(Event e:eventList) {
if(e.getId() == draggedEventId) {
draggedEvent = e;
eventMap.get(e).setAblaufX(ablaufX); // <-- HERE I NEED CELL INDEX
eventMap.get(e).setAblaufY(ablaufY); // <-- HERE I NEED ROW INDEX
//eventMap.put(new TablePos(draggedEvent.getAblaufX(), draggedEvent.getAblaufY()), draggedEvent);
}
}
if(draggedEvent != null) {
event.setDropCompleted(true);
event.consume();
System.out.println(draggedEvent.getText());
}
}
}
});
tableView.setOnDragOver(new EventHandler <DragEvent>() {
public void handle(DragEvent event) {
event.acceptTransferModes(TransferMode.ANY);
event.consume();
}
});
我用“ // <-- HERE I NEED CELL INDEX
”和“ // <-- HERE I NEED ROW INDEX
”
在這些行上,我需要刪除的單元格(新單元格)的columnIndex和rowIndex
您需要將setOnDragDropped
添加到表格單元中,而不是將它們添加到整個TableView
。 下面是有關如何獲取單元格的行和列索引的MCVE。 MCVE本身除了顯示如何獲取單元格的行索引和列索引之外,對其他任何事情均無用。 如果您需要其他幫助,請告訴我。
import javafx.application.Application;
import javafx.beans.property.SimpleStringProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;
public class MCVE extends Application {
@Override
public void start(Stage stage) {
TableView<ObservableList<String>> table = new TableView<ObservableList<String>>();
table.getSelectionModel().setCellSelectionEnabled(true);
TableColumn<ObservableList<String>, String> col1 = new TableColumn<ObservableList<String>, String>();
TableColumn<ObservableList<String>, String> col2 = new TableColumn<ObservableList<String>, String>();
ObservableList<TableColumn<ObservableList<String>, String>> columns = FXCollections.observableArrayList(col1,
col2);
table.getColumns().addAll(columns);
// For each column we set a cellFactory and a cellValueFactory.
for (TableColumn<ObservableList<String>, String> col : columns) {
col.setCellValueFactory(e -> new SimpleStringProperty("1"));
// We need to set the cell factory so that we can create a cell and manipulate its behavior.
col.setCellFactory(e -> {
TableCell<ObservableList<String>, String> cell = new TableCell<ObservableList<String>, String>() {
@Override
public void updateItem(String item, boolean empty) {
// Make sure you call super.updateItem, or you might get really weird bugs.
super.updateItem(item, empty);
if (item == null || empty) {
setText(null);
setGraphic(null);
} else {
setText(item);
setGraphic(null);
}
}
};
// HERE IS HOW TO GET THE ROW AND CELL INDEX
cell.setOnDragDetected(eh -> {
// Get the row index of this cell
int rowIndex = cell.getIndex();
System.out.println("Cell row index: " + rowIndex);
// Get the column index of this cell.
int columnIndex = cell.getTableView().getColumns().indexOf(cell.getTableColumn());
System.out.println("Cell column index: " + columnIndex);
});
return cell;
});
}
ObservableList<ObservableList<String>> items = FXCollections.observableArrayList(
FXCollections.observableArrayList("1", "2"), FXCollections.observableArrayList("1", "2"));
table.setItems(items);
BorderPane view = new BorderPane();
view.setCenter(table);
stage.setScene(new Scene(view));
stage.show();
}
public static void main(String[] args) {
launch();
}
}
您可以使用Event
的pickResult
獲取當前單元格,以訪問TableCell
並使用其獲取坐標:
private static TableCell getCell(Node node) {
// traverse to parent until TableCell is reached
// or it's clear there's no TableCell in the hierarchy above node (root visited)
while (node != null && !(node instanceof TableCell)) {
node = node.getParent();
}
return (TableCell) node;
}
TableCell targetCell = getCell(event.getPickResult().getIntersectedNode());
if (targetCell != null) {
int rowIndex = targetCell.getTableRow().getIndex();
int columnIndex = columnToIndex(targetCell.getTableColumn());
...
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