/*
* Ext GWT 2.2.4 - Ext for GWT
* Copyright(c) 2007-2010, Ext JS, LLC.
* licensing@extjs.com
*
* http://extjs.com/license
*/
package com.extjs.gxt.ui.client.widget.grid;
import com.extjs.gxt.ui.client.core.DomQuery;
import com.extjs.gxt.ui.client.core.El;
import com.extjs.gxt.ui.client.core.XTemplate;
import com.extjs.gxt.ui.client.data.ModelData;
import com.extjs.gxt.ui.client.event.BaseEvent;
import com.extjs.gxt.ui.client.event.Events;
import com.extjs.gxt.ui.client.event.GridEvent;
import com.extjs.gxt.ui.client.event.Listener;
import com.extjs.gxt.ui.client.event.RowExpanderEvent;
import com.extjs.gxt.ui.client.store.ListStore;
import com.extjs.gxt.ui.client.util.KeyNav;
import com.extjs.gxt.ui.client.util.Util;
import com.extjs.gxt.ui.client.widget.Component;
import com.extjs.gxt.ui.client.widget.ComponentPlugin;
import com.google.gwt.user.client.Element;
/**
* A <code>ColumnConfig</li> subclass and a <code>ComponentPlugin</code> that
* adds the ability for each row to be expanded, showing custom content that
* spans all the rows columns.
*
* <dl>
* <dt><b>Events:</b></dt>
*
* <dd><b>BeforeExpand</b> : RowExpanderEvent(rowExpander, model, rowIndex,
* bodyElement)<br>
* <div>Fires before a row is expanded. Listeners can cancel the action by
* calling {@link BaseEvent#setCancelled(boolean)}.</div>
* <ul>
* <li>rowExpander : this</li>
* <li>model : the model</li>
* <li>rowIndex : the row index</li>
* <li>bodyElement : the body element</li>
* </ul>
* </dd>
*
* <dd><b>Expand</b> : RowExpanderEvent(rowExpander, model, rowIndex,
* bodyElement)<br>
* <div>Fires after a row is expanded.</div>
* <ul>
* <li>rowExpander : this</li>
* <li>model : the model</li>
* <li>rowIndex : the row index</li>
* <li>bodyElement : the body element</li>
* </ul>
* </dd>
*
* <dd><b>BeforeCollapse</b> : RowExpanderEvent(rowExpander, model, rowIndex,
* bodyElement)<br>
* <div>Fires before a row is collapsed. Listeners can cancel the action by
* calling {@link BaseEvent#setCancelled(boolean)}.</div>
* <ul>
* <li>rowExpander : this</li>
* <li>model : the model</li>
* <li>rowIndex : the row index</li>
* <li>bodyElement : the body element</li>
* </ul>
* </dd>
*
* <dd><b>Collapse</b> : RowExpanderEvent(rowExpander, model, rowIndex,
* bodyElement)<br>
* <div>Fires after a row is collapsed.</div>
* <ul>
* <li>rowExpander : this</li>
* <li>model : the model</li>
* <li>rowIndex : the row index</li>
* <li>bodyElement : the body element</li>
* </ul>
* </dd>
*
* </dl>
*/
public class RowExpander extends ColumnConfig implements ComponentPlugin {
protected Grid<ModelData> grid;
private XTemplate template;
/**
* Creates a new row expander.
*/
public RowExpander() {
setHeader("");
setWidth(20);
setSortable(false);
setResizable(false);
setFixed(true);
setMenuDisabled(true);
setDataIndex("");
setId("expander");
ariaIgnore = true;
setRenderer(new GridCellRenderer<ModelData>() {
public String render(ModelData model, String property, ColumnData d, int rowIndex, int colIndex,
ListStore<ModelData> store, Grid<ModelData> grid) {
d.cellAttr = "rowspan='2'";
return "<div class='x-grid3-row-expander'> </div>";
}
});
}
/**
* Creates a new row expander with the given template.
*
* @param template the template
*/
public RowExpander(XTemplate template) {
this();
setTemplate(template);
}
/**
* Collapses the given row.
*
* @param rowIndex the rowIndex
*/
public void collapseRow(int rowIndex) {
El row = new El((Element)grid.getView().getRow(rowIndex));
if (row != null && isExpanded(row)) {
collapseRow(row);
}
}
/**
* Expands the given row.
*
* @param rowIndex the row index
*/
public void expandRow(int rowIndex) {
El row = new El((Element)grid.getView().getRow(rowIndex));
if (row != null && !isExpanded(row)) {
expandRow(row);
}
}
/**
* Returns the source grid.
*
* @return the source grid
*/
public Grid<?> getGrid() {
return grid;
}
/**
* Returns the template.
*
* @return the template
*/
public XTemplate getTemplate() {
return template;
}
@SuppressWarnings({"unchecked", "rawtypes"})
public void init(Component component) {
this.grid = (Grid) component;
GridView view = grid.getView();
final GridViewConfig config = view.getViewConfig();
view.viewConfig = new GridViewConfig() {
@Override
public String getRowStyle(ModelData model, int rowIndex, ListStore ds) {
String s = "x-grid3-row-collapsed";
if (config != null) {
return s + " " + config.getRowStyle(model, rowIndex, ds);
} else {
return s;
}
}
};
view.enableRowBody = true;
grid.addListener(Events.RowClick, new Listener<GridEvent>() {
public void handleEvent(GridEvent be) {
onMouseDown(be);
}
});
new KeyNav<GridEvent<?>>(grid) {
@Override
public void onLeft(GridEvent<?> ce) {
onKeyLeft(ce);
}
@Override
public void onRight(GridEvent<?> ce) {
onKeyRight(ce);
}
};
}
/**
* Sets the template.
*
* @param template the template
*/
public void setTemplate(XTemplate template) {
this.template = template;
}
protected boolean beforeExpand(ModelData model, Element body, El row, int rowIndex) {
RowExpanderEvent e = new RowExpanderEvent(this);
e.setModel(model);
e.setRowIndex(rowIndex);
e.setBodyElement(body);
if (fireEvent(Events.BeforeExpand, e)) {
body.setInnerHTML(getBodyContent(model, rowIndex));
return true;
}
return false;
}
protected boolean isExpanded(El row) {
return row.hasStyleName("x-grid3-row-expanded");
}
protected void collapseRow(El row) {
int idx = row.dom.getPropertyInt("rowIndex");
ModelData model = grid.getStore().getAt(idx);
Element body = DomQuery.selectNode("div.x-grid3-row-body", row.dom);
RowExpanderEvent e = new RowExpanderEvent(this);
e.setModel(model);
e.setRowIndex(idx);
e.setBodyElement(body);
if (fireEvent(Events.BeforeCollapse, e)) {
row.replaceStyleName("x-grid3-row-expanded", "x-grid3-row-collapsed");
row.dom.setAttribute("aria-expanded", "false");
fireEvent(Events.Collapse, e);
}
}
protected void expandRow(El row) {
int idx = row.dom.getPropertyInt("rowIndex");
ModelData model = grid.getStore().getAt(idx);
Element body = DomQuery.selectNode("div.x-grid3-row-body", row.dom);
if (beforeExpand(model, body, row, idx)) {
row.replaceStyleName("x-grid3-row-collapsed", "x-grid3-row-expanded");
row.dom.setAttribute("aria-expanded", "true");
RowExpanderEvent e = new RowExpanderEvent(this);
e.setModel(model);
e.setRowIndex(idx);
e.setBodyElement(body);
fireEvent(Events.Expand, e);
}
}
protected String getBodyContent(ModelData model, int rowIndex) {
return template.applyTemplate(Util.getJsObject(model, template.getMaxDepth()));
}
protected void onKeyLeft(GridEvent<?> ce) {
if (grid.getSelectionModel().getSelectedItem() != null) {
collapseRow(grid.getStore().indexOf(grid.getSelectionModel().getSelectedItem()));
}
}
protected void onKeyRight(GridEvent<?> ce) {
if (grid.getSelectionModel().getSelectedItem() != null) {
expandRow(grid.getStore().indexOf(grid.getSelectionModel().getSelectedItem()));
}
}
protected void onMouseDown(GridEvent<?> e) {
if (e.getTarget().getClassName().equals("x-grid3-row-expander")) {
e.stopEvent();
El row = e.getTarget(".x-grid3-row", 15);
toggleRow(row);
}
}
protected void toggleRow(El row) {
if (row.hasStyleName("x-grid3-row-collapsed")) {
expandRow(row);
} else {
collapseRow(row);
}
grid.getView().calculateVBar(false);
}
}