Java tutorial
/** * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.brixcms.web.picker.common; import com.inmethod.grid.IGridColumn; import com.inmethod.grid.SizeUnit; import com.inmethod.grid.column.CheckBoxColumn; import com.inmethod.grid.column.PropertyColumn; import com.inmethod.grid.column.tree.AbstractTreeColumn; import com.inmethod.grid.treegrid.TreeGrid; import org.apache.wicket.Component; import org.apache.wicket.ajax.AjaxRequestTarget; import org.apache.wicket.behavior.AbstractBehavior; import org.apache.wicket.markup.ComponentTag; import org.apache.wicket.markup.html.WebMarkupContainer; import org.apache.wicket.markup.html.basic.Label; import org.apache.wicket.markup.html.panel.Panel; import org.apache.wicket.model.IModel; import org.apache.wicket.model.ResourceModel; import org.brixcms.jcr.wrapper.BrixNode; import org.brixcms.web.picker.node.NodePickerTreeModel; import org.brixcms.web.tree.AbstractTreeModel; import org.brixcms.web.tree.FilteredJcrTreeNode; import org.brixcms.web.tree.JcrTreeNode; import org.brixcms.web.tree.NodeFilter; import org.brixcms.web.util.AbstractModel; import java.text.DateFormat; import java.util.ArrayList; import java.util.Date; import java.util.List; public abstract class NodePickerTreeGridPanel extends Panel { private final static NodeFilter ALLOW_ALL_FILTER = new NodeFilter() { public boolean isNodeAllowed(BrixNode node) { return true; } }; private final NodeFilter visibilityFilter; private final NodeFilter enabledFilter; private TreeGrid<NodePickerTreeModel, JcrTreeNode> grid; public NodePickerTreeGridPanel(String id, NodeFilter visibilityFilter, NodeFilter enabledFilter) { super(id); this.visibilityFilter = visibilityFilter; this.enabledFilter = enabledFilter != null ? enabledFilter : ALLOW_ALL_FILTER; } public NodePickerTreeGridPanel(String id, IModel<?> model, NodeFilter visibilityFilter, NodeFilter enabledFilter) { super(id, model); this.visibilityFilter = visibilityFilter; this.enabledFilter = enabledFilter != null ? enabledFilter : ALLOW_ALL_FILTER; } public TreeGrid<NodePickerTreeModel, JcrTreeNode> getGrid() { return grid; } public NodeFilter getVisibilityFilter() { return visibilityFilter; } @Override protected void onBeforeRender() { if (!hasBeenRendered()) { initComponents(); } expandToSelectedNodes(); super.onBeforeRender(); } protected void initComponents() { grid = new TreeGrid<NodePickerTreeModel, JcrTreeNode>("grid", (IModel<NodePickerTreeModel>) newTreeModel(), newGridColumns()) { @Override protected void onItemSelectionChanged(IModel<JcrTreeNode> rowModel, boolean newValue) { BrixNode node = getNode(rowModel); if (isNodeEnabled(rowModel.getObject()) && node != null) { if (isItemSelected(rowModel)) { onNodeSelected(node); } else { onNodeDeselected(node); } update(); } super.onItemSelectionChanged(rowModel, newValue); } @Override protected void onRowClicked(AjaxRequestTarget target, IModel<JcrTreeNode> rowModel) { BrixNode node = getNode(rowModel); if (isNodeEnabled(rowModel.getObject()) && node != null) { super.onRowClicked(target, rowModel); } } @Override protected void onRowPopulated(WebMarkupContainer rowComponent) { super.onRowPopulated(rowComponent); rowComponent.add(new AbstractBehavior() { @Override public void onComponentTag(Component component, ComponentTag tag) { BrixNode node = getNode(component.getDefaultModel()); if (!isNodeEnabled((JcrTreeNode) component.getDefaultModelObject()) || node == null) { tag.put("class", "disabled"); } } }); } }; configureGrid(grid); add(grid); } protected AbstractTreeModel newTreeModel() { return new AbstractTreeModel() { public JcrTreeNode getRoot() { return new FilteredJcrTreeNode(getRootNode(), visibilityFilter); } }; } protected abstract JcrTreeNode getRootNode(); protected List<IGridColumn<NodePickerTreeModel, JcrTreeNode>> newGridColumns() { List<IGridColumn<NodePickerTreeModel, JcrTreeNode>> columns = new ArrayList<IGridColumn<NodePickerTreeModel, JcrTreeNode>>(); columns.add(new NodePickerCheckBoxColumn("checkbox")); columns.add(new TreeColumn("name", new ResourceModel("name")).setInitialSize(300)); columns.add(new NodePropertyColumn(new ResourceModel("type"), "userVisibleType")); columns.add(new DatePropertyColumn(new ResourceModel("lastModified"), "lastModified")); columns.add(new NodePropertyColumn(new ResourceModel("lastModifiedBy"), "lastModifiedBy")); return columns; } protected void onNodeSelected(BrixNode node) { } protected void onNodeDeselected(BrixNode node) { } private BrixNode getNode(IModel<?> model) { Object object = model.getObject(); if (object instanceof JcrTreeNode) { IModel<BrixNode> nodeModel = ((JcrTreeNode) object).getNodeModel(); return nodeModel != null ? nodeModel.getObject() : null; } else { return null; } } private boolean isNodeEnabled(JcrTreeNode node) { BrixNode n = node.getNodeModel() != null ? node.getNodeModel().getObject() : null; return enabledFilter.isNodeAllowed(n); } protected void configureGrid(TreeGrid<NodePickerTreeModel, JcrTreeNode> grid) { grid.getTree().setRootLess(true); grid.setClickRowToSelect(true); grid.setContentHeight(18, SizeUnit.EM); } protected void expandToSelectedNodes() { for (IModel<?> model : getGrid().getSelectedItems()) { JcrTreeNode node = (JcrTreeNode) model.getObject(); expandToNode(node); } } private void expandToNode(JcrTreeNode node) { boolean first = true; while (node != null && node.getNodeModel() != null && node.getNodeModel().getObject() != null) { BrixNode n = node.getNodeModel().getObject(); if (!first) { getGrid().getTreeState().expandNode(node); } else { first = false; } if (n.getDepth() > 0) { node = TreeAwareNode.Util.getTreeNode((BrixNode) n.getParent(), visibilityFilter); } else { node = null; } } } private class TreeColumn extends AbstractTreeColumn { public TreeColumn(String columnId, IModel headerModel) { super(columnId, headerModel); } @Override protected Component newNodeComponent(String id, final IModel model) { IModel<String> labelModel = new AbstractModel<String>() { @Override public String getObject() { BrixNode node = getNode(model); if (node != null) { return node.getUserVisibleName(); } else { return model.getObject().toString(); } } }; return new Label(id, labelModel); } @Override public int getColSpan(IModel rowModel) { BrixNode node = getNode(rowModel); return node != null ? 1 : 4; } } private class NodePropertyColumn extends PropertyColumn { public NodePropertyColumn(IModel headerModel, String propertyExpression) { super(headerModel, propertyExpression); } @Override protected Object getModelObject(IModel rowModel) { return getNode(rowModel); } } protected class NodePickerCheckBoxColumn extends CheckBoxColumn { public NodePickerCheckBoxColumn(String columnId) { super(columnId); } @Override protected boolean isCheckBoxEnabled(IModel model) { BrixNode node = getNode(model); return isNodeEnabled((JcrTreeNode) model.getObject()) && node != null; } } protected class DatePropertyColumn extends NodePropertyColumn { public DatePropertyColumn(IModel<?> headerModel, String propertyExpression) { super(headerModel, propertyExpression); } @Override protected CharSequence convertToString(Object object) { if (object instanceof Date) { Date date = (Date) object; return DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT).format(date); } else { return null; } } } }