我正在尝试在Vaadin Grid中将布尔值显示为复选框。我不能使用多选模式,因为我需要两列带有复选框的数据。复选框的列具有标题,但复选框本身不应该有标题。请问有什么方法吗?
...
<repositories>
...
<repository>
<id>vaadin-addons</id>
<url>http://maven.vaadin.com/vaadin-addons</url>
</repository>
</repositories>
...
<dependencies>
...
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>grid-renderers-collection-addon</artifactId>
<version>0.94</version>
</dependency>
</dependencies>
...
然后你可以像这样使用它:
grid.getColumn(columnName).setRenderer(new CheckboxRenderer());
您还可以轻松添加监听器:
CheckboxRenderer renderer = new CheckboxRenderer();
grid.getColumn(columnName).setRenderer(renderer);
grid.getColumn(columnName).setHeaderCaption("");
renderer.addClickListener(e -> System.out.println("Hello listener!"));
如果您只需要一个只读的复选框,可以使用以下方法:
grid.getColumn("columnId").setRenderer(new HtmlRenderer(), new BooleanConverter());
HtmlRenderer由Vaadin框架提供,布尔转换器如下:
public class BooleanConverter implements Converter<String, Boolean>
{
@Override
public Boolean convertToModel(String value, Class<? extends Boolean> targetType, Locale locale) throws ConversionException
{
return null;
}
@Override
public String convertToPresentation(Boolean value, Class<? extends String> targetType, Locale locale) throws ConversionException
{
return "<input type='checkbox' disabled='disabled'" + (value.booleanValue() ? " checked" : "") + " />";
}
@Override
public Class<Boolean> getModelType()
{
return Boolean.class;
}
@Override
public Class<String> getPresentationType()
{
return String.class;
}
}
GeneratedPropertyContainer gpcontainer = new GeneratedPropertyContainer(container);
gpcontainer.addGeneratedProperty("columnName",
new PropertyValueGenerator<CheckBox>() {
@Override
public CheckBox getValue(Item item, Object itemId,
Object propertyId) {
// set checkBox listener etc. in here
return new CheckBox();
}
@Override
public Class<CheckBox> getType() {
return CheckBox.class;
}
});
Grid grid = new Grid(gpcontainer);
https://vaadin.com/docs/-/part/framework/datamodel/datamodel-container.html#datamodel.container.gpc
编辑:还需为您的列设置“ComponentRenderer”
mainGrid.addColumn(COLUMN).setRenderer(new ComponentRenderer())