本文介绍了SWT - TableViewer的添加删除按钮到列在表中的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
是否有可能一个删除按钮添加到一个单元格在一个表中？我有5列的表，我想补充一个6列。我想第6列有各行中的删除按钮。
例如行：
That way the user can remove any unwanted rows by just clicking the button.
I have a markup column in the table and it is ComboBox. I created a class that extends EditingSupport.
Would I need to make a another class extending EditingSupport, but creating a button instead of ComboBox?
EDIT
public class AplotDataTableViewer extends TableViewer
{
public AplotDataTableViewer(Composite parent, int style)
{
super(parent, style);
Table table = getTable();
GridData gridData = new GridData(SWT.FILL, SWT.FILL, true, true);
table.setLayoutData(gridData);
createColumns();
table.setHeaderVisible(true);
table.setLinesVisible(true);
setContentProvider(new ArrayContentProvider());
}
private void createColumns() {
String[] titles = { "ItemId", "RevId", "PRL", "Dataset Name", "EC Markup" };
int[] bounds = { 150, 150, 100, 150, 100 };
TableViewerColumn col = createTableViewerColumn(titles[0], bounds[0], 0);
col.setLabelProvider(new ColumnLabelProvider() {
public String getText(Object element) {
if(element instanceof AplotDataModel.AplotDatasetData)
return ((AplotDataModel.AplotDatasetData)element).getDataset().toString();
return super.getText(element);
}
});
col = createTableViewerColumn(titles[1], bounds[1], 1);
col.setLabelProvider(new ColumnLabelProvider() {
public String getText(Object element) {
if(element instanceof AplotDataModel.AplotDatasetData)
return ((AplotDataModel.AplotDatasetData)element).getRev().toString();
return super.getText(element);
}
});
col = createTableViewerColumn(titles[2], bounds[2], 2);
col.setLabelProvider(new ColumnLabelProvider() {
public String getText(Object element) {
if(element instanceof AplotDataModel.AplotDatasetData)
return ((AplotDataModel.AplotDatasetData)element).getPRLValue().toString();
return super.getText(element);
}
});
col = createTableViewerColumn(titles[3], bounds[3], 3);
col.setLabelProvider(new ColumnLabelProvider() {
public String getText(Object element) {
if(element instanceof AplotDataModel.AplotDatasetData)
return ((AplotDataModel.AplotDatasetData)element).getDatasetName().toString();
return super.getText(element);
}
});
col = createTableViewerColumn(titles[4], bounds[4], 4);
col.setLabelProvider(new ColumnLabelProvider() {
public String getText(Object element) {
if(element instanceof AplotDataModel.AplotDatasetData)
return ((AplotDataModel.AplotDatasetData)element).getMarkupValue();
return super.getText(element);
}
});
col.setEditingSupport(new OptionEditingSupport(this));
}
private TableViewerColumn createTableViewerColumn(String header, int width, int idx)
{
TableViewerColumn column = new TableViewerColumn(this, SWT.LEFT, idx);
column.getColumn().setText(header);
column.getColumn().setWidth(width);
column.getColumn().setResizable(true);
column.getColumn().setMoveable(true);
return column;
}
}
EDIT
col = createTableViewerColumn(titles[5], bounds[5], 5);
col.setLabelProvider(new ColumnLabelProvider() {
@Override
public void update(ViewerCell cell) {
TableItem item = new TableItem(getTable(),SWT.NONE);
Button button = new Button(getTable(),SWT.NONE);
button.setText("X");
getControl().setBackground(item.getBackground());
TableEditor editor = new TableEditor(getTable());
editor.grabHorizontal = true;
editor.grabVertical = true;
editor.setEditor(button , item, columnIndex);
editor.layout();
}
});
解决方案
Here is sample working version.
public class TableEditorTest {
/**
* @param args
*/
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
TableViewer viewer = new TableViewer(shell);
viewer.getTable().setHeaderVisible(true);
viewer.getTable().setLinesVisible(true);
viewer.setContentProvider(new ArrayContentProvider());
TableColumn column = new TableColumn(viewer.getTable(), SWT.NONE);
column.setText("First Name");
column.setWidth(100);
TableViewerColumn firstNameCol = new TableViewerColumn(viewer, column);
firstNameCol.setLabelProvider(new ColumnLabelProvider(){
@Override
public String getText(Object element) {
Person p = (Person)element;
return p.getFirstName();
}
});
column = new TableColumn(viewer.getTable(), SWT.NONE);
column.setText("Last Name");
column.setWidth(100);
TableViewerColumn lastNameCol = new TableViewerColumn(viewer, column);
lastNameCol.setLabelProvider(new ColumnLabelProvider(){
@Override
public String getText(Object element) {
Person p = (Person)element;
return p.getLastName();
}
});
column = new TableColumn(viewer.getTable(), SWT.NONE);
column.setText("Actions");
column.setWidth(100);
TableViewerColumn actionsNameCol = new TableViewerColumn(viewer, column);
actionsNameCol.setLabelProvider(new ColumnLabelProvider(){
//make sure you dispose these buttons when viewer input changes
Map<Object, Button> buttons = new HashMap<Object, Button>();
@Override
public void update(ViewerCell cell) {
TableItem item = (TableItem) cell.getItem();
Button button;
if(buttons.containsKey(cell.getElement()))
{
button = buttons.get(cell.getElement());
}
else
{
button = new Button((Composite) cell.getViewerRow().getControl(),SWT.NONE);
button.setText("Remove");
buttons.put(cell.getElement(), button);
}
TableEditor editor = new TableEditor(item.getParent());
editor.grabHorizontal = true;
editor.grabVertical = true;
editor.setEditor(button , item, cell.getColumnIndex());
editor.layout();
}
});
Person p1 = new Person();
p1.setFirstName("George");
p1.setLastName("Burne");
Person p2 = new Person();
p2.setFirstName("Adam");
p2.setLastName("Silva");
Person p3 = new Person();
p3.setFirstName("Nathan");
p3.setLastName("Cowl");
List<Person> persons = new ArrayList<Person>();
persons.add(p1);
persons.add(p2);
persons.add(p3);
viewer.setInput(persons);
shell.open();
while(!shell.isDisposed())
{
if(!display.readAndDispatch())
{
display.sleep();
}
}
display.dispose();
}
private static class Person
{
String firstName;
String lastName;
Person()
{
}
public String getFirstName() {
return firstName;
}
public String getLastName() {
return lastName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
}
}
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