JavaFX tableview：在编辑模式下，默认情况下，顶部单元格保存来自波纹管单元格的数据
我对JavaFX非常陌生。我有一个具有多个列和行的表。可以在表格顶部添加新行的位置。还启用了编辑单元格。但是我面临一个问题。
当我在顶部添加新行并进行编辑时，单元格将在编辑开始时自动用波纹管单元格中的值填充！但是我不想要那个。是像excel这样的功能吗？如果是，我该如何制止呢？这是示例图片和我的自定义EditingCell.java
class EditingCell <S, T>extends TableCell<S, T> {
private TextField textField;
public EditingCell() {
}
@Override
public void startEdit() {
if (!isEmpty()) {
super.startEdit();
if (textField == null) {
createTextField();
}
setGraphic(textField);
setContentDisplay(ContentDisplay.GRAPHIC_ONLY);
// textField.selectAll();
Platform.runLater(new Runnable() {
@Override
public void run() {
textField.requestFocus();
textField.selectAll();
}
});
}
}
@Override
public void cancelEdit() {
super.cancelEdit();
setText((String) getItem());
setGraphic(null);
setContentDisplay(ContentDisplay.TEXT_ONLY);
}
@Override
public void updateItem (T item, boolean empty) {
super.updateItem(item, empty);
if (empty) {
setText(null);
setGraphic(null);
} else {
if (isEditing()) {
if (textField != null) {
textField.setText(getString());
}
setGraphic(textField);
setContentDisplay(ContentDisplay.GRAPHIC_ONLY);
} else {
setText(getString());
setContentDisplay(ContentDisplay.TEXT_ONLY);
}
}
}
@Override
public void commitEdit(T item) {
if (! isEditing() && ! item.equals(getItem())) {
TableView<S> table = getTableView();
if (table != null) {
TableColumn<S, T> column = getTableColumn();
CellEditEvent<S, T> event = new CellEditEvent<>(table,
new TablePosition<S,T>(table, getIndex(), column),
TableColumn.editCommitEvent(), item);
Event.fireEvent(column, event);
}
super.cancelEdit(); // this fires an invalid EditCancelEvent.
// update the item within this cell, so that it represents the new value
updateItem(item, false);
if (table != null) {
// reset the editing cell on the TableView
table.edit(-1, null);
}
}
super.commitEdit(item);
setContentDisplay(ContentDisplay.TEXT_ONLY);
}
private void createTextField() {
textField = new TextField(getString());
textField.setMinWidth(this.getWidth() - this.getGraphicTextGap()
* 2);
textField.focusedProperty().addListener(
new ChangeListener<Boolean>() {
@Override
public void changed(
ObservableValue<? extends Boolean> arg0,
Boolean arg1, Boolean arg2) {
if (!arg2) {
commitEdit((T)textField.getText());
}
}
});
textField.setOnKeyPressed(new EventHandler<KeyEvent>() {
@Override
public void handle(KeyEvent t) {
if (t.getCode() == KeyCode.ENTER) {
commitEdit((T)textField.getText());
} else if (t.getCode() == KeyCode.ESCAPE) {
cancelEdit();
} else if (t.getCode() == KeyCode.TAB) {
commitEdit((T)textField.getText());
TableColumn nextColumn = getNextColumn(!t.isShiftDown());
if (nextColumn != null) {
getTableView().edit(getTableRow().getIndex(),
nextColumn);
}
}
else if (t.getCode() == KeyCode.RIGHT) {
commitEdit((T)textField.getText());
getTableView().getSelectionModel().selectRightCell();
TableColumn nextColumn = getNextColumn(!t.isShiftDown());
if (nextColumn != null) {
getTableView().edit(getTableRow().getIndex(),
nextColumn);
}
t.consume();
} else if (t.getCode() == KeyCode.LEFT) {
commitEdit((T)textField.getText());
getTableView().getSelectionModel().selectLeftCell();
TableColumn prevColumn = getNextColumn(false);
if (prevColumn != null) {
getTableView().edit(getTableRow().getIndex(),
prevColumn);
}
t.consume();
} else if (t.getCode() == KeyCode.UP) {
commitEdit((T)textField.getText());
getTableView().getSelectionModel().selectAboveCell();
int i=getTableView().getSelectionModel().getSelectedIndex();
if(i>=0)
getTableView().edit(i,
getTableColumn());
t.consume();
} else if (t.getCode() == KeyCode.DOWN) {
commitEdit((T)textField.getText());
getTableView().getSelectionModel().selectBelowCell();
int i=getTableView().getSelectionModel().getSelectedIndex();
if(i>=0)
getTableView().edit(i,
getTableColumn());
t.consume();
}
}
});
}
private String getString() {
return getItem() == null ? "" : getItem().toString();
}
private TableColumn<S, ?> getNextColumn(boolean forward) {
List<TableColumn<S, ?>> columns = new ArrayList<>();
for (TableColumn<S, ?> column : getTableView().getColumns()) {
columns.addAll(getLeaves(column));
}
// There is no other column that supports editing.
if (columns.size() < 2) {
return null;
}
int currentIndex = columns.indexOf(getTableColumn());
int nextIndex = currentIndex;
if (forward) {
nextIndex++;
if (nextIndex > columns.size() - 1) {
nextIndex = 0;
}
} else {
nextIndex--;
if (nextIndex < 0) {
nextIndex = columns.size() - 1;
}
}
return columns.get(nextIndex);
}
private List<TableColumn<S, ?>> getLeaves(
TableColumn<S, ?> root) {
List<TableColumn<S, ?>> columns = new ArrayList<>();
if (root.getColumns().isEmpty()) {
// We only want the leaves that are editable.
if (root.isEditable()) {
columns.add(root);
}
return columns;
} else {
for (TableColumn<S, ?> column : root.getColumns()) {
columns.addAll(getLeaves(column));
}
return columns;
}
}
}
在我的initialize方法中，我有如下代码
Callback<TableColumn, TableCell> cellFactory = new Callback<TableColumn, TableCell>() {
public TableCell call(TableColumn p) {
return new EditingCell();
}
};
colName.setCellValueFactory(new PropertyValueFactory<ModelBrBuilding,String>("BranchName"));
colName.setCellFactory(cellFactory);
colName.setOnEditCommit(
new EventHandler<CellEditEvent<ModelBrBuilding, String>>() {
@Override
public void handle(CellEditEvent<ModelBrBuilding, String> t) {
oldName= ((ModelBrBuilding) t.getTableView().getItems().get(
t.getTablePosition().getRow())
).getBranchName(); // catch old value before edit
((ModelBrBuilding) t.getTableView().getItems().get(
t.getTablePosition().getRow())
).setBranchName(t.getNewValue());
newName=t.getNewValue(); // catch new value after edit
boolean edit=((ModelBrBuilding) t.getTableView().getItems().get(
t.getTablePosition().getRow())
).isEdit();
if(edit==false) {
if(oldName!= null )
{
if(!oldName.trim().equals(newName.trim()) && !newName.isEmpty())
{
((ModelBrBuilding) t.getTableView().getItems().get(
t.getTablePosition().getRow())
).setEdit(true);
}
}
else if(!newName.isEmpty()&& newName != null)
((ModelBrBuilding) t.getTableView().getItems().get(
t.getTablePosition().getRow())
).setEdit(true);
}
}
}
);
这是我在表格顶部添加新行的方法。
public ObservableList<ModelBrBuilding> BuildingData;// contains searched data if there is any in database
//tableBuilding is sorted
// Method for adding new row
@FXML
private void addBuilding() {
tableBuilding.setEditable(true);
tableBuilding.getSelectionModel().setCellSelectionEnabled(true);
colName.setEditable(true);
//colShortCode.setEditable(true);
//colActive.setEditable(true);
if(BuildingData==null)//When search result is empty & there is now row in the table
{
tableBuilding.requestFocus();
tableBuilding.getItems().add(0,new ModelBrBuilding());
tableBuilding.layout();
tableBuilding.edit(0, colName);
}
//when search data is not empty
else {
ModelBrBuilding building = new ModelBrBuilding();
try {
BuildingData.add(0,building);
tableBuilding.layout();
tableBuilding.edit(0, colName);
//editBuilding();
} catch (InstantiationException | IllegalAccessException e) {
e.printStackTrace();
}
}
}
有人可以在这方面帮助我吗？
1 个答案:
答案 0 :(得分：0)
最后，我已经解决了。添加新行后，我必须刷新表。
@FXML
private void addBuilding() {
tableBuilding.setEditable(true);
tableBuilding.getSelectionModel().setCellSelectionEnabled(true);
colName.setEditable(true);
//colShortCode.setEditable(true);
//colActive.setEditable(true);
if(BuildingData==null)//When search result is empty & there is now row in the table
{
tableBuilding.requestFocus();
tableBuilding.getItems().add(0,new ModelBrBuilding());
tableBuilding.refresh();
tableBuilding.layout();
tableBuilding.edit(0, colName);
}
//when search data is not empty
else {
ModelBrBuilding building = new ModelBrBuilding();
try {
BuildingData.add(0,building);
tableBuilding.refresh();
tableBuilding.layout();
tableBuilding.edit(0, colName);
//editBuilding();
} catch (InstantiationException | IllegalAccessException e) {
e.printStackTrace();
}
}
}
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