java.lang.Object
- com.vaadin.client.widgets.Grid.Column<Boolean,T>
- - com.vaadin.client.widgets.Grid.SelectionColumn

All Implemented Interfaces:

com.google.gwt.event.shared.EventHandler, GridEnabledHandler, GridSelectionAllowedHandler

Enclosing class:

Grid<T>
```
public final class Grid.SelectionColumn
extends Grid.Column<Boolean,T>
implements GridEnabledHandler, GridSelectionAllowedHandler
```
A column that contains CheckBoxes for representing Grid's row selection. By default only used with MultiSelectionModel.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected void`	`doSetSelectAllCheckBoxVisible()`	Sets the select all checkbox visible or hidden.
`int`	`getExpandRatio()`	Gets the expand ratio for this column.
`double`	`getMaximumWidth()`	Gets the maximum width for this column.
`double`	`getMinimumWidth()`	Gets the minimum width for this column.
`Optional<com.google.gwt.user.client.ui.CheckBox>`	`getSelectAllCheckBox()`	Returns the select all checkbox, which is present in the default header if the used selection model is of type `SelectionModelWithSelectionColumn`.
`Boolean`	`getValue(T row)`	Returns the data that should be rendered into the cell.
`boolean`	`isSelectAllCheckBoxVisible()`	Returns whether the select all checkbox is visible or not.
`void`	`onEnabled(boolean enabled)`	Called when Grid is enabled or disabled.
`void`	`onSelectionAllowed(GridSelectionAllowedEvent event)`	Called when Grid selection is allowed value changes.
`protected void`	`setDefaultHeaderContent(Grid.HeaderCell selectionCell)`	Resets the default header cell contents to column header captions.
`Grid.Column<Boolean,T>`	`setEditable(boolean editable)`	Sets whether the values in this column should be editable by the user when the row editor is active.
`Grid.Column<Boolean,T>`	`setExpandRatio(int ratio)`	Sets the ratio with which the column expands.
`Grid.Column<Boolean,T>`	`setMaximumWidth(double pixels)`	Sets the maximum width for this column.
`Grid.Column<Boolean,T>`	`setMinimumWidth(double pixels)`	Sets the minimum width for this column.
`void`	`setSelectAllCheckBoxVisible(boolean selectAllCheckBoxVisible)`	Sets the select all checkbox visible in the default header row for selection column.
`Grid.Column<Boolean,T>`	`setWidth(double pixels)`	Sets the pixel width of the column.

Methods inherited from class com.vaadin.client.widgets.Grid.Column
clearExpandRatio, getAssistiveCaption, getHeaderCaption, getHidingToggleCaption, getRenderer, getWidth, getWidthActual, isEditable, isHandleWidgetEvents, isHidable, isHidden, isMinimumWidthFromContent, isResizable, isSortable, setAssistiveCaption, setHandleWidgetEvents, setHeaderCaption, setHidable, setHidden, setHidingToggleCaption, setMinimumWidthFromContent, setRenderer, setResizable, setSortable, toString

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Method Detail
  - setDefaultHeaderContent
```
protected void setDefaultHeaderContent(Grid.HeaderCell selectionCell)
```
    Description copied from class: Grid.Column
    
    Resets the default header cell contents to column header captions.
    
    Overrides:
    
    setDefaultHeaderContent in class Grid.Column<Boolean,T>
    
    Parameters:
    
    selectionCell - default header cell for this column
  - setWidth
```
public Grid.Column<Boolean,T> setWidth(double pixels)
```
    Description copied from class: Grid.Column
    
    Sets the pixel width of the column. Use a negative value for the grid to autosize column based on content and available space.
    This action is done "finally", once the current execution loop returns. This is done to reduce overhead of unintentionally always recalculate all columns, when modifying several columns at once.
    If the column is currently hidden, then this set width has effect only once the column has been made visible again.
    
    Overrides:
    
    setWidth in class Grid.Column<Boolean,T>
    
    Parameters:
    
    pixels - the width in pixels or negative for auto sizing
    
    Returns:
    
    this column
  - getValue
```
public Boolean getValue(T row)
```
    Description copied from class: Grid.Column
    
    Returns the data that should be rendered into the cell. By default returning Strings and Widgets are supported. If the return type is a String then it will be treated as preformatted text.
    To support other types you will need to pass a custom renderer to the column via the column constructor.
    
    Specified by:
    
    getValue in class Grid.Column<Boolean,T>
    
    Parameters:
    
    row - The row object that provides the cell content.
    
    Returns:
    
    The cell content
  - setExpandRatio
```
public Grid.Column<Boolean,T> setExpandRatio(int ratio)
```
    Description copied from class: Grid.Column
    
    Sets the ratio with which the column expands.
    By default, all columns expand equally (treated as if all of them had an expand ratio of 1). Once at least one column gets a defined expand ratio, the implicit expand ratio is removed, and only the defined expand ratios are taken into account.
    If a column has a defined width (Grid.Column.setWidth(double)), it overrides this method's effects.
    Example: A grid with three columns, with expand ratios 0, 1 and 2, respectively. The column with a ratio of 0 is exactly as wide as its contents requires. The column with a ratio of 1 is as wide as it needs, plus a third of any excess space, bceause we have 3 parts total, and this column reservs only one of those. The column with a ratio of 2, is as wide as it needs to be, plus two thirds of the excess width.
    This action is done "finally", once the current execution loop returns. This is done to reduce overhead of unintentionally always recalculate all columns, when modifying several columns at once.
    
    Overrides:
    
    setExpandRatio in class Grid.Column<Boolean,T>
    
    Parameters:
    
    ratio - the expand ratio of this column. 0 to not have it expand at all. A negative number to clear the expand value.
    
    Returns:
    
    this column
  - getExpandRatio
```
public int getExpandRatio()
```
    Description copied from class: Grid.Column
    
    Gets the expand ratio for this column.
    
    Overrides:
    
    getExpandRatio in class Grid.Column<Boolean,T>
    
    Returns:
    
    the expand ratio for this column
    
    See Also:
    
    Grid.Column.setExpandRatio(int)
  - setMaximumWidth
```
public Grid.Column<Boolean,T> setMaximumWidth(double pixels)
```
    Description copied from class: Grid.Column
    
    Sets the maximum width for this column.
    This defines the maximum allowed pixel width of the column when it is set to expand.
    This action is done "finally", once the current execution loop returns. This is done to reduce overhead of unintentionally always recalculate all columns, when modifying several columns at once.
    
    Overrides:
    
    setMaximumWidth in class Grid.Column<Boolean,T>
    
    Parameters:
    
    pixels - the maximum width
    
    Returns:
    
    this column
  - getMaximumWidth
```
public double getMaximumWidth()
```
    Description copied from class: Grid.Column
    
    Gets the maximum width for this column.
    
    Overrides:
    
    getMaximumWidth in class Grid.Column<Boolean,T>
    
    Returns:
    
    the maximum width for this column
    
    See Also:
    
    Grid.Column.setMaximumWidth(double)
  - setMinimumWidth
```
public Grid.Column<Boolean,T> setMinimumWidth(double pixels)
```
    Description copied from class: Grid.Column
    
    Sets the minimum width for this column.
    This defines the minimum guaranteed pixel width of the column when it is set to expand.
    This action is done "finally", once the current execution loop returns. This is done to reduce overhead of unintentionally always recalculate all columns, when modifying several columns at once.
    
    Overrides:
    
    setMinimumWidth in class Grid.Column<Boolean,T>
    
    Parameters:
    
    pixels - the minimum width
    
    Returns:
    
    this column
  - getMinimumWidth
```
public double getMinimumWidth()
```
    Description copied from class: Grid.Column
    
    Gets the minimum width for this column.
    
    Overrides:
    
    getMinimumWidth in class Grid.Column<Boolean,T>
    
    Returns:
    
    the minimum width for this column
    
    See Also:
    
    Grid.Column.setMinimumWidth(double)
  - setEditable
```
public Grid.Column<Boolean,T> setEditable(boolean editable)
```
    Description copied from class: Grid.Column
    
    Sets whether the values in this column should be editable by the user when the row editor is active. By default columns are editable.
    
    Overrides:
    
    setEditable in class Grid.Column<Boolean,T>
    
    Parameters:
    
    editable - true to set this column editable, false otherwise
    
    Returns:
    
    this column
    
    See Also:
    
    Grid.editRow(int), Grid.isEditorActive()
  - onEnabled
```
public void onEnabled(boolean enabled)
```
    Description copied from interface: GridEnabledHandler
    
    Called when Grid is enabled or disabled.
    
    Specified by:
    
    onEnabled in interface GridEnabledHandler
    
    Parameters:
    
    enabled - true if status changes from disabled to enabled, otherwise false.
  - setSelectAllCheckBoxVisible
```
public void setSelectAllCheckBoxVisible(boolean selectAllCheckBoxVisible)
```
    Sets the select all checkbox visible in the default header row for selection column.
    
    Parameters:
    
    selectAllCheckBoxVisible - true for visible, false for not
  - isSelectAllCheckBoxVisible
```
public boolean isSelectAllCheckBoxVisible()
```
    Returns whether the select all checkbox is visible or not.
    
    Returns:
    
    true for visible, false for not
  - getSelectAllCheckBox
```
public Optional<com.google.gwt.user.client.ui.CheckBox> getSelectAllCheckBox()
```
    Returns the select all checkbox, which is present in the default header if the used selection model is of type SelectionModelWithSelectionColumn. To handle select all, add SelectAllHandler the grid with Grid.addSelectAllHandler(SelectAllHandler).
    
    Returns:
    
    the select all checkbox, or an empty optional if not in use
  - doSetSelectAllCheckBoxVisible
```
protected void doSetSelectAllCheckBoxVisible()
```
    Sets the select all checkbox visible or hidden.
  - onSelectionAllowed
```
public void onSelectionAllowed(GridSelectionAllowedEvent event)
```
    Description copied from interface: GridSelectionAllowedHandler
    
    Called when Grid selection is allowed value changes.
    
    Specified by:
    
    onSelectionAllowed in interface GridSelectionAllowedHandler
    
    Parameters:
    
    event - the GridSelectionAllowedEvent that was fired

Class Grid.SelectionColumn

Method Summary

Methods inherited from class com.vaadin.client.widgets.Grid.Column

Methods inherited from class java.lang.Object

Method Detail

setDefaultHeaderContent

setWidth

getValue

setExpandRatio

getExpandRatio

setMaximumWidth

getMaximumWidth

setMinimumWidth

getMinimumWidth

setEditable

onEnabled

setSelectAllCheckBoxVisible

isSelectAllCheckBoxVisible

getSelectAllCheckBox

doSetSelectAllCheckBoxVisible

onSelectionAllowed