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index.zulzul<zk>
<window border="normal" title="hello" apply="pkg$.TestComposer">
<div>Welcome to ZK Fiddle , run it right now!</div>
<button id="btn" label="Click Me To Evalute Event Binding With Composer" />
<script type="text/javascript"><![CDATA[
function scrollGridInto(uid, y) {
var grid = zk.Widget.$(uid);
grid.ebody.scrollTop = y;
grid.onSize();
}
]]></script>
Grid
<hlayout>
<button id="gdFirstRowBtn" label="First Row"></button>
<button id="gdLastRowBtn" label="Last Row"></button>
<intbox id="gdRowIntbox"></intbox>
</hlayout>
<grid apply="test.GridCtrl" height="300px">
<custom-attributes org.zkoss.zul.grid.rod="true"/>
</grid>
</window>
</zk>
TestComposer.javajavaimport org.zkoss.zk.ui.*;
import org.zkoss.zk.ui.event.*;
import org.zkoss.zk.ui.util.*;
import org.zkoss.zk.ui.ext.*;
import org.zkoss.zk.au.*;
import org.zkoss.zk.au.out.*;
import org.zkoss.zul.*;
import java.util.ArrayList;
import java.util.List;
import java.util.HashMap;
import java.util.Map;
public class TestComposer extends GenericForwardComposer{
Button gdFirstRowBtn;
Button gdLastRowBtn;
Intbox gdRowIntbox;
MyListModel model;
Grid grid;
ArrayList<String> columnOrder = new ArrayList<String>();
final static String[] columnKeys = new String[]{"c0", "c1", "c3"};
private void resetColumnOrder() {
java.util.List<Column> cs = grid.getColumns().getChildren();
columnOrder = new ArrayList<String>();
for (Column c : cs) {
columnOrder.add(c.getDraggable());
}
}
private void initColumns(final Grid grid) {
final Columns cs = new Columns();
int i = 0;
for (String key : columnKeys) {
final Column col = new Column("Column " + (i++));
col.setDraggable(key);
col.setDroppable("true");
//refer from http://www.zkoss.org/forum/listComment/10875
col.addEventListener(Events.ON_DROP, new EventListener() {
@Override
public void onEvent(Event event) throws Exception {
DropEvent dropEvent = (DropEvent) event;
Component dragged = dropEvent.getDragged();
int from = cs.getChildren().indexOf(dragged);
int to = cs.getChildren().indexOf(col);
Component toObject = (Component) cs.getChildren().get(to);
dragged.setParent(null);
if (to > from) {
cs.insertBefore(dragged, toObject.getNextSibling());
} else {
cs.insertBefore(dragged, toObject);
}
resetColumnOrder();
grid.setModel(model);
}
});
cs.appendChild(col);
}
grid.appendChild(cs);
resetColumnOrder();
}
@Override
public void doAfterCompose(Component comp) throws Exception {
super.doAfterCompose(comp);
grid = (Grid)comp;
initColumns(grid);
grid.setModel(model = new MyListModel());
grid.setRowRenderer(new RowRenderer() {
@Override
public void render(final Row row, Object data, int index) throws Exception {
RowData rowData = (RowData) data;
for (String columnKey : columnOrder) {
row.appendChild(new Label(rowData.getData(columnKey)));
}
//add sclass when click mouse on row
row.addEventListener(Events.ON_CLICK, new EventListener() {
@Override
public void onEvent(Event event) throws Exception {
row.setSclass("row-mouse-clicked");
}
});
}
});
}
public void onClick$gdFirstRowBtn() {
Clients.evalJavaScript("scrollGridInto('" + grid.getUuid() + "'," + getGridTopPosition(0) + ")");
}
public void onClick$gdLastRowBtn() {
Clients.evalJavaScript("scrollGridInto('" + grid.getUuid() + "'," + getGridTopPosition(model.getSize() - 1) + ")");
}
public void onOK$gdRowIntbox() {
Clients.evalJavaScript("scrollGridInto('" + grid.getUuid() + "'," + getGridTopPosition(gdRowIntbox.getValue()) + ")");
}
private int getGridTopPosition(int rowIndex) {
return rowIndex * 22;//assume row height is 22px;
}
class MyListModel extends AbstractListModel {
final static int CACHE_SIZE = 60;
ArrayList<RowData> _subset;
int _startAt;
int totalSizeInDB = 10000;
@Override
public Object getElementAt(int index) {
if (index >= _startAt && _subset != null && index - _startAt < _subset.size())
return _subset.get(index - _startAt); //cache hit
_subset = new ArrayList<RowData>(); //drop _subset, and load a subset of data, say, 60, to _subset
this._startAt = index;
//load data from DB
for (int i = index; i < index + CACHE_SIZE; i++) {
_subset.add(new RowData("r: " + i + ", c: " + 0,
"r: " + i + ", c: " + 1,
"r: " + i + ", c: " + 2));
}
return _subset.get(0);
}
@Override
public int getSize() {
return totalSizeInDB;
}
}
class RowData {
HashMap<String, String> data;
RowData (String... items) {
this.data = new HashMap<String, String>();
int idx = 0;
for (String i : items) {
if (idx < columnKeys.length) {
data.put(columnKeys[idx++], i);
}
}
}
public String getData(String columnKey) {
return data.get(columnKey);
}
}
}