Java Code Examples for com.google.gwt.view.client.SingleSelectionModel#addSelectionChangeHandler()

/**
 * Creates the scrollable list of cells each of which serves as a link to a template.
 *
 * @param list an ArrayList of TemplateInfo
 * @return A CellList widget
 */
public CellList<TemplateInfo> makeTemplateSelector(ArrayList<TemplateInfo> list) {
  TemplateCell templateCell = new TemplateCell(list.get(0), templateHostUrl);

  CellList<TemplateInfo> templateCellList = new CellList<TemplateInfo>(templateCell,TemplateInfo.KEY_PROVIDER);
  templateCellList.setPageSize(list.size() + 10);
  templateCellList.setKeyboardSelectionPolicy(KeyboardSelectionPolicy.ENABLED);
  templateCellList.setWidth("250px");
  templateCellList.setHeight("355px");
  templateCellList.setVisible(true);
  templateCellList.getElement().getStyle().setOverflowY(Style.Overflow.SCROLL);

  // Add a selection model to handle user selection.
  final SingleSelectionModel<TemplateInfo> selectionModel =
    new SingleSelectionModel<TemplateInfo>(TemplateInfo.KEY_PROVIDER);
  templateCellList.setSelectionModel(selectionModel);
  selectionModel.setSelected(list.get(0), true);
  final TemplateUploadWizard wizard = this;
  selectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
      public void onSelectionChange(SelectionChangeEvent event) {
        TemplateInfo selected = selectionModel.getSelectedObject();
        if (selected != null) {
          selectedTemplateNAME = selected.name;
          TemplateWidget.setTemplate(selected, wizard.getTemplateUrlHost());
        }
      }
    });

  // Set the total row count. This isn't strictly necessary, but it affects
  // paging calculations, so its good habit to keep the row count up to date.
  templateCellList.setRowCount(list.size(), true);

  // Push the data into the widget.
  templateCellList.setRowData(0, list);
  return templateCellList;
}
 

@SuppressWarnings("unchecked")
public Widget asWidget() {
    VerticalPanel panel = new VerticalPanel();
    panel.addStyleName("fill-layout-width");

    // table
    table = new DefaultCellTable<>(numRows, keyProvider);
    dataProvider = new ListDataProvider<>(keyProvider);
    dataProvider.addDataDisplay(table);
    final SingleSelectionModel<Property> selectionModel = new SingleSelectionModel<>(keyProvider);
    table.setSelectionModel(selectionModel);
    selectionModel.addSelectionChangeHandler(event -> {
        Property selection = selectionModel.getSelectedObject();
        if (selection == null) {
            propertyManager.onDeselect();
        } else {
            propertyManager.onSelect(selection);
        }
    });

    // columns
    Column<Property, String> keyColumn = new TextColumn<Property>() {
        @Override
        public String getValue(Property property) {
            return property.getName();
        }
    };
    keyColumn.setSortable(true);
    Column<Property, String> valueColumn;
    if (inlineEditing) {
        valueColumn = new Column<Property, String>(new DefaultEditTextCell()) { {
                setFieldUpdater((index, property, value) -> getPropertyValue(property).set(value));
            }

            @Override
            public String getValue(Property property) {
                return property.getValue().get(VALUE).asString();
            }
        };
    } else {
        valueColumn = new TextColumn<Property>() {
            @Override
            public String getValue(Property property) {
                return getPropertyValue(property).asString();
            }
        };
    }
    ColumnSortEvent.ListHandler<Property> sortHandler = new ColumnSortEvent.ListHandler<>(dataProvider.getList());
    sortHandler.setComparator(keyColumn, new Comparator<Property>() {
        @Override
        public int compare(Property o1, Property o2) {
            return o1.getName().toLowerCase().compareTo(o2.getName().toLowerCase());
        }
    });
    table.addColumn(keyColumn, Console.CONSTANTS.common_label_key());
    table.addColumn(valueColumn, Console.CONSTANTS.common_label_value());
    table.setColumnWidth(keyColumn, 40, Style.Unit.PCT);
    table.setColumnWidth(valueColumn, 60, Style.Unit.PCT);
    table.addColumnSortHandler(sortHandler);
    table.getColumnSortList().push(keyColumn);

    // tools
    if (!hideTools) {
        ToolStrip tools = new ToolStrip();
        addButton = new ToolButton(addLabel, event -> {
            addDialog.clearValues();
            propertyManager.openAddDialog(addDialog);
        });
        removeButton = new ToolButton(removeLabel, event -> {
            final Property selection = selectionModel.getSelectedObject();
            if (selection != null) {
                Feedback.confirm(Console.MESSAGES.removeProperty(),
                        Console.MESSAGES.removePropertyConfirm(selection.getName()),
                        new Feedback.ConfirmationHandler() {
                            @Override
                            public void onConfirmation(boolean isConfirmed) {
                                if (isConfirmed) {
                                    propertyManager.onRemove(selection);
                                }
                            }
                        });
            }
        });
        AddressTemplate effectiveAddress = operationAddress != null ? operationAddress : propertyManager
                .getAddress();
        if (effectiveAddress != null) {
            addButton.setOperationAddress(effectiveAddress.getTemplate(), propertyManager.getAddOperationName());
            removeButton
                    .setOperationAddress(effectiveAddress.getTemplate(), propertyManager.getRemoveOperationName());
        }
        tools.addToolButtonRight(addButton);
        tools.addToolButtonRight(removeButton);
        panel.add(tools);
    }

    panel.add(table);
    DefaultPager pager = new DefaultPager();
    pager.setDisplay(table);
    panel.add(pager);
    return panel;
}
 

public ComboPicker(String cssSuffix) {

        cellList = new CellList<String>(new TextCell()
        {
            @Override
            public void render(Context context, String data, SafeHtmlBuilder sb) {
                String cssName = (context.getIndex() %2 > 0) ? "combobox-item combobox-item-odd" : "combobox-item";

                if(data.equals(displayed.getActual()))
                    cssName+=" combobox-item-selected";

                sb.append(TEMPLATE.item(cssName, data));
            }

        });

        cellList.setPageSize(100);

        final SingleSelectionModel<String> selectionModel = new SingleSelectionModel<String>();
        cellList.setSelectionModel(selectionModel);

        selectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
            public void onSelectionChange(SelectionChangeEvent event) {
                String selectedValue = selectionModel.getSelectedObject();

                setDisplayedValue(selectedValue);
                popup.hide();

                onSelection(selectedValue);
            }
        });

        final String panelId = "combopicker_popup";
        popup = new PopupPanel(true, true) {

            @Override
            protected void onPreviewNativeEvent(Event.NativePreviewEvent event) {
                if (Event.ONKEYUP == event.getTypeInt()) {
                    if (event.getNativeEvent().getKeyCode() == ESCAPE) {
                        // Dismiss when escape is pressed
                        popup.hide();
                    }
                }
            }

            public void onBrowserEvent(Event event) {
                super.onBrowserEvent(event);
            }
        };

        popup.getElement().setId(panelId);

        popup.setStyleName("default-popup");

        popup.addStyleName("triangle-border");
        popup.addStyleName("top-left");

        popup.setWidget(new ScrollPanel(cellList));

        displayed = new Display("");

        header = new HorizontalPanel();
        header.setStyleName("combobox"+cssSuffix);
        header.add(displayed);

        HTML icon = new HTML("<span style='font-size:12px;cursor:pointer'><i class='icon-chevron-down'></i></span>");
        header.add(icon);

        displayed.getElement().getParentElement().setAttribute("width", "100%");

        icon.getParent().getElement().setAttribute("width", "18");

        //header.getElement().setAttribute("width", "95%");
        header.getElement().setAttribute("cellspacing", "0");
        header.getElement().setAttribute("cellpadding", "0");
        header.getElement().setAttribute("border", "0");


        ClickHandler clickHandler = new ClickHandler() {
            @Override
            public void onClick(ClickEvent clickEvent) {
                openPanel();
            }
        };

        displayed.addClickHandler(clickHandler);
        icon.addClickHandler(clickHandler);

    }