如何使用 GWT 2.1 数据展示小部件 [英] How to use GWT 2.1 Data Presentation Widgets
问题描述
在 2010 年 Google IO 上宣布 GWT 2.1 将包含新的数据展示小部件.2.1M 可供下载,并且可能包含小部件,但尚未出现任何文档.
At the 2010 Google IO it was announced that GWT 2.1 would include new Data Presentation Widgets. 2.1M is available for download, and presumably the widgets are included, but no documentation has yet surfaced.
是否有关于如何使用它们的简短教程或示例?我看到一个谣言 CellList 和 CellTable 是有问题的类.他们的 Javadoc 中充斥着大量的 TODO,因此在使用方面仍有相当多的缺失.
Is there a short tutorial or example for how to use them? I've seen a rumor that CellList and CellTable are the classes in question. The Javadoc for them is riddled with lots of TODOs, so quite a bit is still missing in terms of usage.
推荐答案
2.1 中的 javadocs 包 com.google.gwt.cell.client
当代码在自行车棚中时,将此行添加到您的 gwt.xml 文件中:
While the code is in bikeshed, add this line to your gwt.xml file:
<inherits name='com.google.gwt.requestfactory.RequestFactory'/>
以下示例如下:
- TextCell 的 CellList 与PageSizePager
- TextCell 的 CellListSimplePager
- TextCell 的 CellListSimplePager 和 PageSizePager(buggy)和
- 带有字符串标题的 CellTable 和文本单元标题
package dpw.client;
import java.util.ArrayList;
import com.google.gwt.cell.client.TextCell;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.user.cellview.client.CellList;
import com.google.gwt.user.cellview.client.CellTable;
import com.google.gwt.user.cellview.client.PageSizePager;
import com.google.gwt.user.cellview.client.SimplePager;
import com.google.gwt.user.cellview.client.TextColumn;
import com.google.gwt.user.cellview.client.Header;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.view.client.ListViewAdapter;
public class Index implements EntryPoint {
public void onModuleLoad() {
// create some data
ArrayList<String> values = new ArrayList<String>();
values.add("one");
values.add("two");
values.add("three");
values.add("four");
values.add("five");
values.add("six");
// create a ListViewAdapter
ListViewAdapter<String> lva = new ListViewAdapter<String>();
// give the ListViewAdapter our data
lva.setList(values);
{
// CellList of TextCells with PageSizePager
CellList<String> cl = new CellList<String>(new TextCell());
// set the initial pagesize to 2
cl.setPageSize(2);
// add the CellLists to the adaptor
lva.addView(cl);
// create a PageSizePager, giving it a handle to the CellList
PageSizePager<String> psp = new PageSizePager<String>(cl, 2);
// add the CellList to the page
RootPanel.get().add(cl);
// add the PageSizePager to the page
RootPanel.get().add(psp);
}
RootPanel.get().add(new HTML("<hr />"));
{
// CellList of TextCells with a SimplePager
CellList<String> cl = new CellList<String>(new TextCell());
// set the initial pageSize to 2
cl.setPageSize(2);
// add the CellLists to the adaptor
lva.addView(cl);
// create a pager, giving it a handle to the CellList
SimplePager<String> pager = new SimplePager<String>(cl,
SimplePager.TextLocation.CENTER);
// add the CellList to the page
RootPanel.get().add(cl);
// add the Pager to the page
RootPanel.get().add(pager);
}
RootPanel.get().add(new HTML("<hr />"));
{
// CellList of TextCells with a SimplePager and PageSizePager
CellList<String> cl = new CellList<String>(new TextCell());
// set the initial pageSize to 2
cl.setPageSize(2);
// add the CellLists to the adaptor
lva.addView(cl);
// create a PageSizePager, giving it a handle to the CellList
PageSizePager<String> psp = new PageSizePager<String>(cl, 1);
// create a pager, giving it a handle to the CellList
SimplePager<String> pager = new SimplePager<String>(cl,
SimplePager.TextLocation.CENTER);
// add the CellList to the page
RootPanel.get().add(cl);
// add the Pager to the page
RootPanel.get().add(pager);
// add the PageSizePager to the page
RootPanel.get().add(psp);
}
RootPanel.get().add(new HTML("<hr />"));
{
// CellTable
CellTable<String> ct = new CellTable<String>();
ct.setPageSize(2);
lva.addView(ct);
// add a column with a simple string header
ct.addColumn(new TextColumn<String>() {
@Override
public String getValue(String object) {
return object;
}
}, "String Header");
//add a column with a TextCell header
ct.addColumn(new TextColumn<String>() {
@Override
public String getValue(String object) {
return "%" + object + "%";
}
}, new Header<String>(new TextCell()) {
@Override
public String getValue() {
return "TextCell Header";
}
});
// create a pager, giving it a handle to the CellTable
SimplePager<String> pager = new SimplePager<String>(ct,
SimplePager.TextLocation.CENTER);
// add the CellList to the page
RootPanel.get().add(ct);
// add the Pager to the page
RootPanel.get().add(pager);
}
}
}
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