org.zkoss.zul
Interface RowRendererExt

public interface RowRendererExt

Provides additional control to RowRenderer.

Author:

tomyeh

Field Summary

static int

DETACH_ON_RENDER Returned by getControls() to indicate that the list cells added by newCell(org.zkoss.zul.Row) must be detached before calling RowRenderer.render(org.zkoss.zul.Row, T, int).

Method Summary

int	getControls() Returns how a grid shall render the live data.
Component	newCell(Row row) Create a component that will be attached to the unloaded row.
Row	newRow(Grid grid) Creates an instance of Row that will be attached to grid.

Field Detail

DETACH_ON_RENDER

static final int DETACH_ON_RENDER

Returned by getControls() to indicate that the list cells added by newCell(org.zkoss.zul.Row) must be detached before calling RowRenderer.render(org.zkoss.zul.Row, T, int).

Default: true.
If this interface is not specified, this flag is assumed to be specified.

If you don't specify this flag, the implementation of RowRenderer.render(org.zkoss.zul.Row, T, int) must be aware of the existence of the first cell (of the passed row).

See Also:

Constant Field Values

Method Detail

newRow

Row newRow(Grid grid)

Creates an instance of Row that will be attached to grid. The created component will be passed to RowRenderer.render(org.zkoss.zul.Row, T, int) to append the required information to show a row of the data.

Note: remember to invoke AbstractComponent.applyProperties() to initialize the properties, defined in the component definition, properly.

If null is returned, the default row is created as follow.

final Row row = new Row();
row.applyProperties();
return row;

Note: DO NOT call AbstractComponent.setParent(org.zkoss.zk.ui.Component).

Returns:

the row if you'd like to create it differently, or null if you want Grid to create it for you

newCell

Component newCell(Row row)

Create a component that will be attached to the unloaded row. By unloaded row we mean the row that is not loaded with the data retreived from the model. That is, RowRenderer.render(org.zkoss.zul.Row, T, int) is not called yet.

Notice that this callback shall generate an empty cell, rather than showing the data retrieved from the model. The showing of the data from model shall be done in RowRenderer.render(org.zkoss.zul.Row, T, int).

If null is returned, the default cell is created as follows.

final Label cell = new Label();
cell.applyProperties();
return cell;

Note: remember to invoke Component.applyProperties() to initialize the properties, defined in the component definition, properly, if you create an instance instead of returning null.

Note: DO NOT call AbstractComponent.setParent(org.zkoss.zk.ui.Component).

Note: DO NOT call Component.setParent(org.zkoss.zk.ui.Component). Don't create cells for other columns.

Parameters:

row - the row. It is the same as that is returned by newRow(org.zkoss.zul.Grid)

Returns:

the cell if you'd like to create it differently, or null if you want Grid to create it for you

getControls

int getControls()

Returns how a grid shall render the live data.

Note: if this interface is not implemented, DETACH_ON_RENDER is assumed.

Returns:

a combination of DETACH_ON_RENDER or 0 to indicate how to render the live data.