I have put a GWT-CellTree in a DataGrid. It works except for one thing: When clicking on the tree-expand-icon, nothing happens.
How can this be fixed ?
best regards, Magnus
package com.raybased.gwt.configtool.client.grid;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.user.cellview.client.DataGrid;
import com.google.gwt.user.client.ui.RootLayoutPanel;
import com.google.gwt.user.client.ui.SimpleLayoutPanel;
public class HelloWorld implements EntryPoint {
public void onModuleLoad() {
DataGrid grid= (DataGrid) new NodesGrid().getTable();
grid.setWidth("100%");
SimpleLayoutPanel slp = new SimpleLayoutPanel();
slp.add(grid);
RootLayoutPanel.get().add(slp);
}
}
package com.raybased.gwt.configtool.client.grid;
import com.google.gwt.cell.client.ClickableTextCell;
import com.google.gwt.cell.client.FieldUpdater;
import com.google.gwt.dom.client.Style;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.text.shared.AbstractSafeHtmlRenderer;
import com.google.gwt.text.shared.SafeHtmlRenderer;
import com.google.gwt.user.cellview.client.*;
import com.google.gwt.user.cellview.client.HasKeyboardSelectionPolicy.KeyboardSelectionPolicy;
import com.google.gwt.view.client.ListDataProvider;
import java.util.Comparator;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.function.Function;
public class NodesGrid {
private AbstractCellTable<Node> table = new DataGrid<>();
private Column nameColumn;
private Column<Node, String> showBlocksColumn;
private final Set<Integer> showBlocks = new HashSet<>();
public Column getNameColumn() {
return nameColumn;
}
public AbstractCellTable<Node> getTable() {
return table;
}
public NodesGrid() {
table.setKeyboardSelectionPolicy(KeyboardSelectionPolicy.ENABLED);
table.setWidth("100%");
CustomCellTableBuilder c = new CustomCellTableBuilder(this, table);
table.setTableBuilder(c);
Node nodes = new Node();
nodes.setName("hello");
nodes.setId(123);
Node n2 = new Node();
n2.setName("testing");
nodes.getBlocks().add(n2);
ListDataProvider<Node> dataProvider = new ListDataProvider<>();
dataProvider.addDataDisplay(table);
List<Node> list = dataProvider.getList();
list.add(nodes);
addShowBlocks();
nameColumn = getSorter(list, "Name", Comparator.comparing(Node::getName), Node::getName);
}
private Column getSorter(List<Node> list,
String name,
Comparator<Node> cmp,
Function<Node, String> supplier) {
TextColumn<Node> column = new TextColumn<Node>() {
@Override
public String getValue(Node object) {
return supplier.apply(object);
}
};
table.addColumn(column, name);
column.setSortable(true);
ColumnSortEvent.ListHandler<Node> columnSortHandler = new ColumnSortEvent.ListHandler<>(list);
columnSortHandler.setComparator(column, cmp);
table.addColumnSortHandler(columnSortHandler);
table.getColumnSortList().push(column);
return column;
}
public Column<Node, String> getShowBlocksColumn() {
return showBlocksColumn;
}
public Set<Integer> getShowBlocks() {
return showBlocks;
}
void addShowBlocks() {
SafeHtmlRenderer<String> anchorRenderer = new AbstractSafeHtmlRenderer<String>() {
@Override
public SafeHtml render(String object) {
SafeHtmlBuilder sb = new SafeHtmlBuilder();
sb.appendHtmlConstant("(<a href=\"javascript:;\">").appendEscaped(object)
.appendHtmlConstant("</a>)");
return sb.toSafeHtml();
}
};
showBlocksColumn = new Column<Node, String>(new ClickableTextCell(anchorRenderer)) {
@Override
public String getValue(Node node) {
if (showBlocks.contains(node.getId())) {
return "hide blocks";
} else {
return "show blocks";
}
}
};
showBlocksColumn.setFieldUpdater(new FieldUpdater<Node, String>() {
@Override
public void update(int index, Node node, String value) {
if (showBlocks.contains(node.getId())) {
showBlocks.remove(node.getId());
} else {
showBlocks.add(node.getId());
}
table.redrawRow(index);
}
});
table.addColumn(showBlocksColumn);
table.setColumnWidth(0, 10, Style.Unit.EM);
}
}
package com.raybased.gwt.configtool.client.grid;
import com.google.gwt.cell.client.AbstractCell;
import com.google.gwt.cell.client.Cell;
import com.google.gwt.cell.client.TextCell;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.user.cellview.client.CellTree;
import com.google.gwt.user.cellview.client.HasKeyboardSelectionPolicy.KeyboardSelectionPolicy;
import com.google.gwt.user.cellview.client.TreeNode;
import com.google.gwt.user.client.ui.Widget;
import com.google.gwt.view.client.ListDataProvider;
import com.google.gwt.view.client.SingleSelectionModel;
import com.google.gwt.view.client.TreeViewModel;
import java.util.ArrayList;
import java.util.List;
public class NodesTree {
private CellTree tree;
public NodesTree(Node node) {
TreeViewModel model = new CustomTreeModel(node);
tree = new CellTree(model, null);
tree.setKeyboardSelectionPolicy(KeyboardSelectionPolicy.ENABLED);
TreeNode rootNode = tree.getRootTreeNode();
openAll(rootNode);
}
private static class TopLevel {
private final String name;
private List<Node> blocks = new ArrayList<>();
public TopLevel(String name) {
this.name = name;
}
public TopLevel(String name, List<Node> blocks) {
this.name = name;
this.blocks = blocks;
}
public String getName() {
return name;
}
public List<Node> getBlocks() {
return blocks;
}
}
private static class CustomTreeModel implements TreeViewModel {
private final List<TopLevel> topLevels;
private final SingleSelectionModel<String> selectionModel
= new SingleSelectionModel<>();
public CustomTreeModel(Node node) {
topLevels = new ArrayList<>();
{
TopLevel blocksNode = new TopLevel("Blocks", new ArrayList(node.getBlocks()));
topLevels.add(blocksNode);
}
{
TopLevel outgoing = new TopLevel("Outgoing");
topLevels.add(outgoing);
}
{
TopLevel incoming = new TopLevel("Incoming");
topLevels.add(incoming);
}
}
public <T> NodeInfo<?> getNodeInfo(T value) {
if (value == null) {
// LEVEL 0.
ListDataProvider<TopLevel> dataProvider
= new ListDataProvider<>(
topLevels);
Cell<TopLevel> cell = new AbstractCell<TopLevel>() {
@Override
public void render(Context context, TopLevel value, SafeHtmlBuilder sb) {
sb.appendHtmlConstant(" ");
sb.appendEscaped(value.getName());
}
};
return new DefaultNodeInfo<>(dataProvider, cell);
} else if (value instanceof TopLevel) {
// LEVEL 1.
ListDataProvider<Node> dataProvider = new ListDataProvider<>(((TopLevel) value).getBlocks());
Cell<Node> cell = new AbstractCell<Node>() {
@Override
public void render(Context context, Node value, SafeHtmlBuilder sb) {
if (value != null) {
sb.appendHtmlConstant(" ");
sb.appendEscaped("(" + value.getName() + ")");
}
}
};
return new DefaultNodeInfo<>(dataProvider, cell);
} else if (value instanceof Node) {
// LEVEL 2 - LEAF.
String params = "test";
ArrayList<String> str = new ArrayList<>();
str.add(params);
ListDataProvider<String> dataProvider = new ListDataProvider<>(str);
return new DefaultNodeInfo<>(dataProvider, new TextCell(), selectionModel, null);
}
return null;
}
public boolean isLeaf(Object value) {
if (value instanceof String) {
return true;
}
return false;
}
}
private void openAll(TreeNode rootNode) {
if (rootNode == null) return;
for (int i = 0; i < rootNode.getChildCount(); i++) {
TreeNode node = rootNode.setChildOpen(i, true);
openAll(node);
}
}
public Widget getWidget() {
return tree;
}
}
package com.raybased.gwt.configtool.client.grid;
import com.google.gwt.dom.builder.shared.DivBuilder;
import com.google.gwt.dom.builder.shared.TableCellBuilder;
import com.google.gwt.dom.builder.shared.TableRowBuilder;
import com.google.gwt.dom.client.Style;
import com.google.gwt.safehtml.shared.SafeHtmlUtils;
import com.google.gwt.user.cellview.client.AbstractCellTable;
import com.google.gwt.user.cellview.client.AbstractCellTableBuilder;
import com.google.gwt.user.cellview.client.Column;
import com.google.gwt.view.client.SelectionModel;
public class CustomCellTableBuilder extends AbstractCellTableBuilder<Node> {
NodesGrid nodesGrid;
private final String rowStyle;
private final String selectedRowStyle;
private final String cellStyle;
private final String selectedCellStyle;
/**
* Construct a new table builder.
*
* @param cellTable the table this builder will build rows for
*/
public CustomCellTableBuilder(NodesGrid nodesGrid, AbstractCellTable<Node> cellTable) {
super(cellTable);
this.nodesGrid = nodesGrid;
AbstractCellTable.Style style = cellTable.getResources().style();
rowStyle = style.evenRow();
selectedRowStyle = " " + style.selectedRow();
cellStyle = style.cell() + " " + style.evenRowCell();
selectedCellStyle = " " + style.selectedRowCell();
}
@Override
protected void buildRowImpl(Node rowValue, int absRowIndex) {
// Calculate the row styles.
SelectionModel<? super Node> selectionModel = cellTable.getSelectionModel();
boolean isSelected =
(selectionModel == null || rowValue == null) ? false : selectionModel
.isSelected(rowValue);
StringBuilder trClasses = new StringBuilder(rowStyle);
if (isSelected) {
trClasses.append(selectedRowStyle);
}
String cellStyles = cellStyle;
if (isSelected) {
cellStyles += selectedCellStyle;
}
TableRowBuilder row = startRow();
row.className(trClasses.toString());
buildRow(row, rowValue, cellStyles, nodesGrid.getShowBlocksColumn());
buildRow(row, rowValue, cellStyles, nodesGrid.getNameColumn());
row.endTR();
if (nodesGrid.getShowBlocks().contains(rowValue.getId())) {
buildBlockRow(rowValue, cellStyles);
}
}
void buildRow(TableRowBuilder row, Node rowValue, String cellStyles, Column column) {
TableCellBuilder td = row.startTD();
td.className(cellStyles);
td.style().outlineStyle(Style.OutlineStyle.NONE).endStyle();
renderCell(td, createContext(0), column, rowValue);
td.endTD();
}
private void buildBlockRow(Node rowValue, String cellStyles) {
TableRowBuilder row = startRow();
buildCell(rowValue, cellStyles, row);
row.endTR();
}
private void buildCell(Node rowValue, String cellStyles, TableRowBuilder row) {
NodesTree hw = new NodesTree(rowValue);
TableCellBuilder td = row.startTD().colSpan(5);
td.className(cellStyles);
DivBuilder div = td.startDiv();
String t = hw.getWidget().getElement().getInnerHTML();
div.html(SafeHtmlUtils.fromTrustedString(t));
div.end();
td.endTD();
}
}
package com.raybased.gwt.configtool.client.grid;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
public class Node implements Serializable {
String name;
List<Node> blocks = new ArrayList<>();
String params;
int id;
public Node() {
}
public String getParams() {
return params;
}
public void setParams(String params) {
this.params = params;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public List<Node> getBlocks() {
return blocks;
}
}
You received this message because you are subscribed to the Google Groups "GWT Users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscribe@googlegroups.com.
To post to this group, send email to google-web-toolkit@googlegroups.com.
Visit this group at https://groups.google.com/group/google-web-toolkit.
For more options, visit https://groups.google.com/d/optout.
No comments:
Post a Comment