AbstractHeaderOrFooterBuilder (GWT 2.7.0)

java.lang.Object
- com.google.gwt.user.cellview.client.AbstractHeaderOrFooterBuilder<T>

Type Parameters:
T - the data type of the table

All Implemented Interfaces:

FooterBuilder<T>, HeaderBuilder<T>

Direct Known Subclasses:

DefaultHeaderOrFooterBuilder
```
public abstract class AbstractHeaderOrFooterBuilder<T>
extends Object
implements HeaderBuilder<T>, FooterBuilder<T>
```
Default implementation of HeaderBuilder that renders columns.

Constructor Summary

Constructors
Constructor and Description
`AbstractHeaderOrFooterBuilder(AbstractCellTable<T> table, boolean isFooter)` Create a new DefaultHeaderBuilder for the header of footer section.

Method Summary

Methods
Modifier and Type	Method and Description
`TableSectionBuilder`	`buildFooter()` Builds the DOM subtree for this footer.
`TableSectionBuilder`	`buildHeader()` Builds the DOM subtree for this header.
`protected abstract boolean`	`buildHeaderOrFooterImpl()` Implementation that builds the header or footer using the convenience methods in this class.
`protected void`	`enableColumnHandlers(ElementBuilderBase<?> builder, Column<T,?> column)` Enables column-specific event handling for the specified element.
`Column<T,?>`	`getColumn(Element elem)` Given an element in the DOM subtree returned by the most recent call to `HeaderBuilder.buildHeader()`, returns the Column that should be the target of any button clicks or other events on that element, or null if the events should be discarded.
`Header<?>`	`getHeader(Element elem)` If you want to handle browser events using a subclass of `Header`, implement this method to return the appropriate instance and cell table will forward events originating in the element to the `Header`.
`protected Header<?>`	`getHeader(int index)` Get the header or footer at the specified index.
`int`	`getRowIndex(TableRowElement row)` Get the row index from the associated `TableRowElement` (an TR element).
`protected AbstractCellTable<T>`	`getTable()`
`boolean`	`isBuildingFooter()` Check if this builder is building a header or footer table.
`boolean`	`isColumn(Element elem)` Check if an element contains a `Column`.
`boolean`	`isHeader(Element elem)` Check if an element contains a `Header`.
`boolean`	`isSortIconStartOfLine()` Check if the icon is located at the start or end of the line.
`protected <H> void`	`renderHeader(ElementBuilderBase<?> out, Cell.Context context, Header<H> header)` Renders a given Header into a given ElementBuilderBase.
`protected void`	`renderSortableHeader(ElementBuilderBase<?> out, Cell.Context context, Header<?> header, boolean isSorted, boolean isSortAscending)` Render a header, including a sort icon if the column is sortable and sorted.
`void`	`setSortIconStartOfLine(boolean isStartOfLine)` Set the position of the sort icon to the start or end of the line.
`protected TableRowBuilder`	`startRow()` Add a header (or footer) row to the table, below any rows previously added.

Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, toString

- Constructor Detail
  - AbstractHeaderOrFooterBuilder
```
public AbstractHeaderOrFooterBuilder(AbstractCellTable<T> table,
                             boolean isFooter)
```
    Create a new DefaultHeaderBuilder for the header of footer section.
    
    Parameters:
    table - the table being built
    isFooter - true if building the footer, false if the header
- Method Detail
  - buildFooter
```
public final TableSectionBuilder buildFooter()
```
    Description copied from interface: FooterBuilder
    
    Builds the DOM subtree for this footer. The root of the subtree must be a TFOOT element, as appropriate. This method may be called multiple times and should return a new DOM subtree each time.
    If the footer is empty, return null.
    
    Specified by:
    
    buildFooter in interface FooterBuilder<T>
    
    Returns:
    a TableSectionBuilder representing the new footer, or null if the footer is empty
  - buildHeader
```
public final TableSectionBuilder buildHeader()
```
    Description copied from interface: HeaderBuilder
    
    Builds the DOM subtree for this header. The root of the subtree must be a THEAD element, as appropriate. This method may be called multiple times and should return a new DOM subtree each time.
    If the header is empty, return null.
    
    Specified by:
    
    buildHeader in interface HeaderBuilder<T>
    
    Returns:
    a TableSectionBuilder representing the new header, or null if the header is empty
  - getColumn
```
public Column<T,?> getColumn(Element elem)
```
    Description copied from interface: HeaderBuilder
    
    Given an element in the DOM subtree returned by the most recent call to HeaderBuilder.buildHeader(), returns the Column that should be the target of any button clicks or other events on that element, or null if the events should be discarded. The column is used to support features such as column sorting.
    
    Specified by:
    
    getColumn in interface FooterBuilder<T>
    
    Specified by:
    
    getColumn in interface HeaderBuilder<T>
    
    Parameters:
    elem - the element that the contains column
    
    Returns:
    the immediate column contained by the element
  - getHeader
```
public Header<?> getHeader(Element elem)
```
    Description copied from interface: HeaderBuilder
    
    If you want to handle browser events using a subclass of Header, implement this method to return the appropriate instance and cell table will forward events originating in the element to the Header. Return null if events from the element should be discarded.
    
    Specified by:
    
    getHeader in interface FooterBuilder<T>
    
    Specified by:
    
    getHeader in interface HeaderBuilder<T>
    
    Parameters:
    elem - the element that the contains header
    
    Returns:
    the immediate Header contained by the element
  - getRowIndex
```
public int getRowIndex(TableRowElement row)
```
    Description copied from interface: HeaderBuilder
    
    Get the row index from the associated TableRowElement (an TR element).
    
    Specified by:
    
    getRowIndex in interface FooterBuilder<T>
    
    Specified by:
    
    getRowIndex in interface HeaderBuilder<T>
    
    Parameters:
    row - the row element
    
    Returns:
    the row value index
  - isBuildingFooter
```
public boolean isBuildingFooter()
```
    Check if this builder is building a header or footer table.
    
    Returns:
    true if a footer, false if a header
  - isColumn
```
public boolean isColumn(Element elem)
```
    Description copied from interface: HeaderBuilder
    
    Check if an element contains a Column. This method should return false if and only if HeaderBuilder.getColumn(Element) would return null.
    
    Specified by:
    
    isColumn in interface FooterBuilder<T>
    
    Specified by:
    
    isColumn in interface HeaderBuilder<T>
    
    Parameters:
    elem - the element of interest
  - isHeader
```
public boolean isHeader(Element elem)
```
    Description copied from interface: HeaderBuilder
    
    Check if an element contains a Header. This method should return false if and only if HeaderBuilder.getHeader(Element) would return null.
    
    Specified by:
    
    isHeader in interface FooterBuilder<T>
    
    Specified by:
    
    isHeader in interface HeaderBuilder<T>
    
    Parameters:
    elem - the element of interest
  - isSortIconStartOfLine
```
public boolean isSortIconStartOfLine()
```
    Check if the icon is located at the start or end of the line. The start of the line refers to the left side in LTR mode and the right side in RTL mode. The default location is the start of the line.
  - setSortIconStartOfLine
```
public void setSortIconStartOfLine(boolean isStartOfLine)
```
    Set the position of the sort icon to the start or end of the line. The start of the line refers to the left side in LTR mode and the right side in RTL mode. The default location is the start of the line.
  - buildHeaderOrFooterImpl
```
protected abstract boolean buildHeaderOrFooterImpl()
```
    Implementation that builds the header or footer using the convenience methods in this class.
    
    Returns:
    true if the header contains content, false if empty
  - enableColumnHandlers
```
protected final void enableColumnHandlers(ElementBuilderBase<?> builder,
                        Column<T,?> column)
```
    Enables column-specific event handling for the specified element. If a column is sortable, then clicking on the element or a child of the element will trigger a sort event.
    
    Parameters:
    builder - the builder to associate with the column. The builder should be a child element of a row returned by startRow() and must be in a state where an attribute can be added.
    column - the column to associate
  - getHeader
```
protected final Header<?> getHeader(int index)
```
    Get the header or footer at the specified index.
    
    Parameters:
    index - the column index of the header
    
    Returns:
    the header or footer, depending on the value of isFooter
  - getTable
```
protected AbstractCellTable<T> getTable()
```
  - renderHeader
```
protected final <H> void renderHeader(ElementBuilderBase<?> out,
                    Cell.Context context,
                    Header<H> header)
```
    Renders a given Header into a given ElementBuilderBase. This method ensures that the CellTable widget will handle events events originating in the Header.
    
    Type Parameters:
    H - the data type of the header
    Parameters:
    out - the ElementBuilderBase to render into. The builder should be a child element of a row returned by startRow() and must be in a state that allows both attributes and elements to be added
    context - the Cell.Context of the header being rendered
    header - the Header to render
  - renderSortableHeader
```
protected final void renderSortableHeader(ElementBuilderBase<?> out,
                        Cell.Context context,
                        Header<?> header,
                        boolean isSorted,
                        boolean isSortAscending)
```
    Render a header, including a sort icon if the column is sortable and sorted.
    
    Parameters:
    out - the builder to render into
    header - the header to render
    context - the context of the header
    isSorted - true if the column is sorted
    isSortAscending - indicated the sort order, if sorted
  - startRow
```
protected final TableRowBuilder startRow()
```
    Add a header (or footer) row to the table, below any rows previously added.
    
    Returns:
    the row to add

Class AbstractHeaderOrFooterBuilder<T>

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

AbstractHeaderOrFooterBuilder

Method Detail

buildFooter

buildHeader

getColumn

getHeader

getRowIndex

isBuildingFooter

isColumn

isHeader

isSortIconStartOfLine

setSortIconStartOfLine

buildHeaderOrFooterImpl

enableColumnHandlers

getHeader

getTable

renderHeader

renderSortableHeader

startRow