我是 RCP 框架的初学者。我在 eclipse RCP3 应用程序名称中使用了一个编辑器,例如“Food editor”。在这个编辑器中,我制作了一个带有 SWT.Check 表项的 SWT 表。 我遇到了有关复选框选择的问题。
该编辑器的当前场景是,当食品编辑器打开时,我选择复选框,然后打开新的编辑器名称,例如 Employee_Editor。 在 Employee_Editor 打开之前,我关闭了带有选定复选框的食品编辑器。然后我再次打开食物编辑器,然后前一个“选定”复选框显示为“未选定”,为什么会发生这种情况?
我试图找到这个问题的解决方案,我在互联网上搜索,我找到了使用数据库“选定的复选框”另存为数据类型 boolean 值的解决方案。 但我不想这样做,因为当很多数据出现时,SQL 查询会多次触发。
因此,我尝试通过在 createPartControl 中定义一种方法“saveSelectedCheckBox”,该方法将选定的复选框表项保存到“selectedTableItemList”中。 但当我关闭食物编辑器然后再次打开它时,我也遇到了问题,我遇到了带有空值的“selectedTableItemList”问题。 我已经分享了下面给出的代码。
public class FoodDetailsEditor extends EditorPart {
public static final String ID = "rcp_demo.Editor.FoodDetailsEditor"; //$NON-NLS-1$Food_Details
public static final String BID = "Food_Details";
private static final String STORE_SELECTION = "rcp_demo.Editor.FoodDetailsEditor";
private Table table;
ArrayList<Integer> selectedTableItemList= null;
@Override
public void createPartControl(Composite parent) {
ScrolledComposite scrolledComposite_2 = new ScrolledComposite(parent, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL);
scrolledComposite_2.setExpandHorizontal(true);
scrolledComposite_2.setExpandVertical(true);
Composite composite = new Composite(scrolledComposite_2, SWT.NONE);
composite.setLayout(new GridLayout(1, false));
table = new Table(composite, SWT.BORDER | SWT.FULL_SELECTION|SWT.CHECK);
GridData gd_table = new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1);
gd_table.heightHint = 156;
gd_table.widthHint = 565;
table.setLayoutData(gd_table);
table.setHeaderVisible(true);
table.setLinesVisible(true);
TableColumn tblclmnCheckbox = new TableColumn(table, SWT.NONE);
tblclmnCheckbox.setWidth(100);
tblclmnCheckbox.setText("Checkbox");
TableColumn tblclmnTiming = new TableColumn(table, SWT.NONE);
tblclmnTiming.setWidth(100);
tblclmnTiming.setText("Timing");
TableColumn tblclmnMonday = new TableColumn(table, SWT.NONE);
tblclmnMonday.setWidth(100);
tblclmnMonday.setText("Monday");
TableColumn tblclmnTuesday = new TableColumn(table, SWT.NONE);
tblclmnTuesday.setWidth(100);
tblclmnTuesday.setText("Tuesday");
TableColumn tblclmnWednesday = new TableColumn(table, SWT.NONE);
tblclmnWednesday.setWidth(100);
tblclmnWednesday.setText("Wednesday");
TableColumn tblclmnThursday = new TableColumn(table, SWT.NONE);
tblclmnThursday.setWidth(100);
tblclmnThursday.setText("Thursday");
TableColumn tblclmnFriday = new TableColumn(table, SWT.NONE);
tblclmnFriday.setWidth(100);
tblclmnFriday.setText("Friday");
TableColumn tblclmnSaturday = new TableColumn(table, SWT.NONE);
tblclmnSaturday.setWidth(100);
tblclmnSaturday.setText("Saturday");
scrolledComposite_2.setContent(composite);
scrolledComposite_2.setMinSize(composite.computeSize(SWT.DEFAULT, SWT.DEFAULT));
TableItem item1 = new TableItem(table, SWT.NONE);
item1.setText(new String[]{"","10:00 to 10:30","Food1","Food2","Food3","Food4","Food5"});
TableItem item2 = new TableItem(table, SWT.NONE);
item2.setText(new String[]{"","11:00 to 11:30","Food1","Food2","Food3","Food4","Food5"});
TableItem item3 = new TableItem(table, SWT.NONE);
item3.setText(new String[]{"","12:00 to 12:30","Food1","Food2","Food3","Food4","Food5"});
TableItem item4 = new TableItem(table, SWT.NONE);
item4.setText(new String[]{"","13:00 to 13:30","Food1","Food2","Food3","Food4","Food5"});
table.addSelectionListener(new SelectionAdapter()
{
@Override
public void widgetSelected(SelectionEvent event)
{
if( event.detail == SWT.CHECK )
{
if( table.indexOf( ( TableItem )event.item ) == table.getSelectionIndex() )
{
TableItem ti = ( TableItem )event.item;
ti.setChecked( !ti.getChecked() );
System.out.println("event.index:-"+event.item);
}
}
saveSelectedCheckBox(table);
}
private void saveSelectedCheckBox(Table table) {
// TODO Auto-generated method stub
TableItem[] items = table.getItems();
selectedTableItemList=new ArrayList<Integer>();//Creating arraylist
for (int ro = 0; ro < table.getItemCount();ro++)
{ if(items[ro].getChecked()== true)
{
System.out.println("items[ro]:=="+items[ro]);
selectedTableItemList.add(ro);
}
}
for(int row = 0; row < selectedTableItemList.size();row++)
{
System.out.println("selectedTableItemList:--"+selectedTableItemList);
}
}
});
}
@Override
public void setFocus() {
// Set the focus
}
@Override
public void doSave(IProgressMonitor monitor) {
// Do the Save operation
}
@Override
public void doSaveAs() {
// Do the Save As operation
}
@Override
public void init(IEditorSite site, IEditorInput input)
throws PartInitException {
System.out.println("init called");
System.out.println("selectedTableItemList:--"+selectedTableItemList);
// Initialize the editor part
if (!(input instanceof FoodDetailsEditorInput)) {
throw new PartInitException("Invalid Input: Must be " + FoodDetailsEditorInput.class.getName());
}
setSite(site);
setInput(input);
}
@Override
public boolean isDirty()
{
return false;
}
@Override
public boolean isSaveAsAllowed() {
System.out.println("isSaveAsAllowed called");
return true;
}
}
我希望当食品编辑器打开时,我选择复选框,然后打开新的编辑器名称,例如 Employee_Editor。 然后我再次打开食物编辑器“选定”复选框,显示为“选定”。如何才能做到这一点?请帮助我。
我的系统配置:
Windows 64Bit OS.
Eclipse Kepler 32 bit.
jdk 1.8
最佳答案
当您关闭编辑器时,您会丢失其状态,并且在打开编辑器期间会再次执行createPartControl()
。这样你就可以让你的表处于初始状态。您应该在创建表并将值设置为先前用户选择的值后执行 TableItem.setChecked()
。最好的方法 - 将表行中的数据转换为对象并使用 TableViewer创建表。
private TableViewer viewer;
private List<WeeklyMenu> menu = Menu.MENU.getWeeklyMenu();
public void createPartControl(Composite parent) {
Table table = createTable(parent);
viewer.setInput(menu);
for (TableItem item : table.getItems()) {
WeeklyMenu weeklyMenu = (WeeklyMenu)item.getData();
item.setChecked(weeklyMenu.isChecked());
}
viewer.refresh();
table.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
if( e.detail == SWT.CHECK )
{
TableItem item = (TableItem)e.item;
WeeklyMenu weeklyMenu = (WeeklyMenu)item.getData();
weeklyMenu.setChecked(item.getChecked());
}
}
});
}
private Table createTable(Composite parent) {
viewer = new TableViewer(parent, SWT.BORDER | SWT.FULL_SELECTION | SWT.CHECK);
Table table = viewer.getTable();
table.setHeaderVisible(true);
table.setLinesVisible(true);
viewer.setContentProvider(new IStructuredContentProvider() {
@Override
public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
// TODO Auto-generated method stub
}
@Override
public void dispose() {
// TODO Auto-generated method stub
}
@Override
public Object[] getElements(Object inputElement) {
return menu.toArray();
}
});
createColumns(table);
return table;
}
private void createColumns(Table table) {
TableLayout layout = new TableLayout();
layout.addColumnData(new ColumnWeightData(10, true));
layout.addColumnData(new ColumnWeightData(20, true));
layout.addColumnData(new ColumnWeightData(20, true));
layout.addColumnData(new ColumnWeightData(20, true));
layout.addColumnData(new ColumnWeightData(20, true));
layout.addColumnData(new ColumnWeightData(20, true));
layout.addColumnData(new ColumnWeightData(20, true));
layout.addColumnData(new ColumnWeightData(20, true));
layout.addColumnData(new ColumnWeightData(20, true));
table.setLayout(layout);
TableViewerColumn column = createTableViewerColumn("Checkbox");
column.setLabelProvider(new ColumnLabelProvider(){
@Override
public String getText(Object element) {
return "";
}
});
column = createTableViewerColumn("Timing");
column.setLabelProvider(new ColumnLabelProvider(){
@Override
public String getText(Object element) {
return ((WeeklyMenu)element).getTiming();
}
});
column = createTableViewerColumn("Monday");
column.setLabelProvider(new ColumnLabelProvider(){
@Override
public String getText(Object element) {
return ((WeeklyMenu)element).getMonFood();
}
});
column = createTableViewerColumn("Tuesday");
column.setLabelProvider(new ColumnLabelProvider(){
@Override
public String getText(Object element) {
return ((WeeklyMenu)element).getTueFood();
}
});
column = createTableViewerColumn("Wednesday");
column.setLabelProvider(new ColumnLabelProvider(){
@Override
public String getText(Object element) {
return ((WeeklyMenu)element).getWedFood();
}
});
column = createTableViewerColumn("Thursday");
column.setLabelProvider(new ColumnLabelProvider(){
@Override
public String getText(Object element) {
return ((WeeklyMenu)element).getThuFood();
}
});
column = createTableViewerColumn("Friday");
column.setLabelProvider(new ColumnLabelProvider(){
@Override
public String getText(Object element) {
return ((WeeklyMenu)element).getFriFood();
}
});
column = createTableViewerColumn("Saturday");
column.setLabelProvider(new ColumnLabelProvider(){
@Override
public String getText(Object element) {
return ((WeeklyMenu)element).getSatFood();
}
});
column = createTableViewerColumn("Sunday");
column.setLabelProvider(new ColumnLabelProvider(){
@Override
public String getText(Object element) {
return ((WeeklyMenu)element).getSunFood();
}
});
}
private TableViewerColumn createTableViewerColumn(String name) {
TableViewerColumn viewerColumn = new TableViewerColumn(viewer, SWT.CENTER);
TableColumn column = viewerColumn.getColumn();
column.setText(name);
column.setMoveable(true);
return viewerColumn;
}
类WeeklyMenu
:
public class WeeklyMenu {
private boolean isChecked;
private String timing;
private String monFood;
private String tueFood;
private String wedFood;
private String thuFood;
private String friFood;
private String satFood;
private String sunFood;
public WeeklyMenu(boolean isChecked, String timing, String monFood, String tueFood, String wedFood, String thuFood, String friFood,
String sutFood, String sunFood) {
super();
this.isChecked = isChecked;
this.timing = timing;
this.monFood = monFood;
this.tueFood = tueFood;
this.wedFood = wedFood;
this.thuFood = thuFood;
this.friFood = friFood;
this.satFood = sutFood;
this.sunFood = sunFood;
}
public String getTiming() {
return timing;
}
public void setTiming(String timing) {
this.timing = timing;
}
public boolean isChecked() {
return isChecked;
}
public void setChecked(boolean isChecked) {
this.isChecked = isChecked;
}
public String getMonFood() {
return monFood;
}
public void setMonFood(String monFood) {
this.monFood = monFood;
}
public String getTueFood() {
return tueFood;
}
public void setTueFood(String tueFood) {
this.tueFood = tueFood;
}
public String getWedFood() {
return wedFood;
}
public void setWedFood(String wedFood) {
this.wedFood = wedFood;
}
public String getThuFood() {
return thuFood;
}
public void setThuFood(String thuFood) {
this.thuFood = thuFood;
}
public String getFriFood() {
return friFood;
}
public void setFriFood(String friFood) {
this.friFood = friFood;
}
public String getSatFood() {
return satFood;
}
public void setSatFood(String sutFood) {
this.satFood = sutFood;
}
public String getSunFood() {
return sunFood;
}
public void setSunFood(String sunFood) {
this.sunFood = sunFood;
}
}
和类菜单
:
public class Menu {
public final static Menu MENU = new Menu();
private List<WeeklyMenu> weeklyMenu = new ArrayList<WeeklyMenu>();
private Menu(){
weeklyMenu.add(new WeeklyMenu(false, "10:00 to 10:30", "Food1", "Food2", "Food3", "Food4", "Food5", "Food6", "Food7"));
weeklyMenu.add(new WeeklyMenu(false, "10:30 to 11:00", "Food1", "Food2", "Food3", "Food4", "Food5", "Food6", "Food7"));
weeklyMenu.add(new WeeklyMenu(false, "11:00 to 11:30", "Food1", "Food2", "Food3", "Food4", "Food5", "Food6", "Food7"));
weeklyMenu.add(new WeeklyMenu(false, "11:30 to 12:00", "Food1", "Food2", "Food3", "Food4", "Food5", "Food6", "Food7"));
}
public List<WeeklyMenu> getWeeklyMenu() {
return weeklyMenu;
}
}
将此类添加到您的项目中,并将 createPartControl()
替换为引用的代码片段。
关于java - 如何在 RCP 应用程序中保存选定的复选框?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/44626963/