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8guest203.83.75.34399ureSep 18, 2012 3:47:47 AMlinkresources
index.zulzul<?component name="hPagingGrid" macroURI="hPagingGrid.zul" class="pkg$.HPagingGrid"?>
<zk>
<window title="hPagingGrid" border="normal" width="500px"
height="500px" apply="pkg$.TestComposer">
<hPagingGrid model="${model}" titles="${titles}" vflex="1" />
</window>
</zk>TestComposer.javajavaimport java.util.ArrayList;
import java.util.List;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.util.GenericForwardComposer;
import org.zkoss.zul.ListModelList;
public class TestComposer extends GenericForwardComposer {
@Override
public void doBeforeComposeChildren(Component comp) throws Exception {
super.doBeforeComposeChildren(comp);
int colLen = 1004;
String[] titles = new String[colLen];
for(int i = 0; i < colLen; i++)
titles[i] = "Column " + i;
List list = new ArrayList();
for(int i = 0; i < 300; i++) {
String[] s = new String[colLen];
for(int j = 0; j < colLen; j++)
s[j] = "item " + i + j;
list.add(s);
}
comp.setAttribute("model", new ListModelList(list));
comp.setAttribute("titles", titles);
}
}hPagingGrid.zulzul<div hflex="1" vflex="1">
<toolbar>
<intbox id="intbox" width="50px" value="0"
forward="onChange=onUpdatePage,onOK=onUpdatePage"/>
<toolbarbutton label="prev" forward="onMove(-1)"/>
<toolbarbutton label="next" forward="onMove(1)"/>
</toolbar>
<grid id="grid" hflex="1" vflex="1">
<columns id="columns"/>
</grid>
</div>HPagingGrid.javajavaimport org.zkoss.zk.ui.Components;
import org.zkoss.zk.ui.HtmlMacroComponent;
import org.zkoss.zk.ui.WrongValueException;
import org.zkoss.zk.ui.event.ForwardEvent;
import org.zkoss.zul.Column;
import org.zkoss.zul.Columns;
import org.zkoss.zul.Grid;
import org.zkoss.zul.Intbox;
import org.zkoss.zul.Label;
import org.zkoss.zul.ListModel;
import org.zkoss.zul.Row;
import org.zkoss.zul.RowRenderer;
public class HPagingGrid extends HtmlMacroComponent {
private int _pgsz = 5;
private int startPos = 0;
private String[] titles;
private Grid grid;
private Columns columns;
private Intbox intbox;
private ListModel model;
public HPagingGrid() {
setEnclosingTag("div");
}
@Override
public void afterCompose() {
super.afterCompose();
Components.wireVariables(this, this);
Components.addForwards(this, this);
syncContent();
}
public int getActivePage() {
return intbox != null ? intbox.getValue(): 0;
}
public void setActivePage(int pg) throws WrongValueException {
if (pg < 0)
throw new WrongValueException("Unable to set active page to "+pg);
if (intbox.getValue() != pg) {
intbox.setValue(pg);
syncContent();
}
}
public int getPageSize() {
return _pgsz;
}
public void setPageSize(int size) throws WrongValueException {
if (size <= 0)
throw new WrongValueException("positive only");
if (_pgsz != size)
_pgsz = size;
}
public void setTitles(String[] titles) {
this.titles = titles;
}
public String[] getTitles() {
return titles;
}
public void setModel(ListModel model) {
this.model = model;
if (grid != null)
grid.setModel(model);
}
public ListModel getModel() {
return model;
}
private void syncTitles() {
if (titles == null || columns == null)
return;
columns.getChildren().clear();
for (int i = 0, j = startPos, len = titles.length;
len > j && i < _pgsz; j = startPos + ++i)
columns.appendChild(new Column(titles[j]));
}
private void syncContent() {
if (model == null || grid == null)
return;
if (grid.getModel() != model)
grid.setModel(model);
startPos = intbox.getValue() * _pgsz;
syncTitles();
grid.setRowRenderer(new PagingRowRenderer());
}
public void onMove(ForwardEvent event) {
int i = Integer.parseInt(event.getData().toString());
int val = checkVal(intbox.getValue() + i);
if (val != intbox.getValue()) {
intbox.setValue(val);
syncContent();
}
}
public void onUpdatePage() {
int val = checkVal(intbox.getValue());
if (val != intbox.getValue())
intbox.setValue(val);
syncContent();
}
private int checkVal(int val) {
if (val < 0)
return 0;
int len = columnLength() - 1;
if (len > 0 && val * _pgsz > len) {
len++;
return len / _pgsz - (len % _pgsz == 0 ? 1: 0);
}
return val;
}
private int columnLength() {
if (model != null) {
Object o = model.getElementAt(0);
if (o != null)
return ((String[])o).length;
}
return 0;
}
private class PagingRowRenderer implements RowRenderer {
public void render(Row row, Object obj) throws Exception {
String[] s = (String[]) obj;
for (int i = 0, len = s.length, j = startPos;
len > j && i < _pgsz; j = startPos + ++i)
row.appendChild(new Label(s[j]));
}
}
}