com.inmethod.grid.column
Class CheckBoxColumn<M,I,S>

java.lang.Object
  com.inmethod.grid.column.AbstractColumn<M,I,S>
      com.inmethod.grid.column.CheckBoxColumn<M,I,S>

Type Parameters:

M - grid model object type

I - row/item model object type

All Implemented Interfaces:

IGridColumn<M,I,S>, Serializable, IDetachable, IClusterable

public class CheckBoxColumn<M,I,S>
extends AbstractColumn<M,I,S>

Column that allows a row in grid to be selected. The column cell contains a checkbox which selects and deselects the row. When row selection state is changed, the entire row is updated using Ajax.

If the grid is in single selection mode, the column header will remain empty. If the column is in multi selection mode, the column header will contain a checkbox which selects all displayed rows (i.e. the rows on current page for DataGrid and visible rows in TreeGrid). When the header checkbox is deselected, it deselects all rows (on all pages). This is to ensure that when user deselects one page, no invisible rows are left selected.

Author:

Matej Knopp

See Also:

Serialized Form

CheckBoxColumn

public CheckBoxColumn(String columnId)

Creates a new checkbox column.

Parameters:

columnId - column id (must be unique within the grid)

newCell

public Component newCell(WebMarkupContainer parent,
                         String componentId,
                         IModel<I> rowModel)

Creates a new cell component. This method is called for rows that are not lightweight ( IGridColumn.isLightWeight(IModel) returns false ).

Specified by:

newCell in interface IGridColumn<M,I,S>

Specified by:

newCell in class AbstractColumn<M,I,S>

Parameters:

parent - Parent component. This is passed in only for convenience, the method implementation is not supposed to add the newly created component to the parent.

componentId - required id of newly created components

rowModel - model for given row

Returns:

new cell component

newHeader

public Component newHeader(String componentId)

Creates a new component for column header.

Specified by:

newHeader in interface IGridColumn<M,I,S>

Overrides:

newHeader in class AbstractColumn<M,I,S>

Parameters:

componentId - required id that the component must have

Returns:

Component representing a column header

isCheckBoxEnabled

protected boolean isCheckBoxEnabled(IModel<I> model)

isCheckBoxVisible

protected boolean isCheckBoxVisible(IModel<I> model)

getCellCssClass

public String getCellCssClass(IModel<I> rowModel,
                              int rowNum)

Returns the cell specified by rowModel. The class is applied to the appropriate <td> element in the grid.

Specified by:

getCellCssClass in interface IGridColumn<M,I,S>

Overrides:

getCellCssClass in class AbstractColumn<M,I,S>

Parameters:

rowModel - model for given row

rowNum - index of row for DataGrid, -1 for TreeGrid

Returns:

cell style class or null

getHeaderCssClass

public String getHeaderCssClass()

Description copied from class: AbstractColumn

Returns the CSS class for this column header. The class is applied to the appropriate <th> element in the grid.

Specified by:

getHeaderCssClass in interface IGridColumn<M,I,S>

Overrides:

getHeaderCssClass in class AbstractColumn<M,I,S>

Returns:

CSS class for this column header or null

getRowTooltipModel

protected IModel<String> getRowTooltipModel(IModel<I> itemModel)

Overriding this method allows to specify a tooltip for checkbox in each row.

Parameters:

itemModel - model for item in given row

Returns:

tooltip model or null