Package eu.webtoolkit.jwt

Class WAbstractItemView

java.lang.Object

eu.webtoolkit.jwt.WObject

eu.webtoolkit.jwt.WWidget

eu.webtoolkit.jwt.WCompositeWidget

eu.webtoolkit.jwt.WAbstractItemView

Direct Known Subclasses:

WTableView, WTreeView

public abstract class WAbstractItemView
extends WCompositeWidget

An abstract base class for item Views.

See WTableView or WTreeView for a description.

i18n

The strings used in this class can be translated by overriding the default values for the following localization keys:

• Wt.WAbstractItemView.PageIOfN: {1} of {2}
• Wt.WAbstractItemView.PageBar.First: 슫 First
• Wt.WAbstractItemView.PageBar.Previous: � Previous
• Wt.WAbstractItemView.PageBar.Next: Next �
• Wt.WAbstractItemView.PageBar.Last: Last 슻

Nested Class Summary

Nested classes/interfaces inherited from class eu.webtoolkit.jwt.WObject

WObject.FormData

Field Summary

Fields

Modifier and Type	Field	Description
protected EnumSet<DropLocation>	enabledDropLocations_
protected WWidget	uDragWidget_

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	WAbstractItemView()	Creates a new item view.
protected	WAbstractItemView(WContainerWidget parentContainer)	Creates a new item view.

Method Summary

Modifier and Type	Method	Description
void	clearSelection()	Clears the selection.
Signal2<WModelIndex,WMouseEvent>	clicked()	Signal emitted when clicked.
final void	closeEditor(WModelIndex index)	Closes the editor for the given index.
void	closeEditor(WModelIndex index, boolean saveData)	Closes the editor for the given index.
final void	closeEditors()	Closes all open editors.
void	closeEditors(boolean saveData)	Closes all open editors.
Signal2<Integer,WLength>	columnResized()	Returns the signal emitted when a column is resized by the user.
protected WWidget	createExtraHeaderWidget(int column)	Create an extra widget in the header.
protected WWidget	createHeaderWidget(int column)
Signal2<WModelIndex,WMouseEvent>	doubleClicked()	Signal emitted when double clicked.
protected void	dropEvent(WDropEvent e, WModelIndex index)	Handles a drop event (drag & drop).
protected void	dropEvent(WDropEvent e, WModelIndex index, Side side)	Handles a drop event (drag & drop).
void	edit(WModelIndex index)	Opens an editor for the given index.
protected void	enableAjax()	Progresses to an Ajax-enabled widget.
protected WWidget	extraHeaderWidget(int column)	Returns the extra header widget.
AlignmentFlag	getColumnAlignment(int column)	Returns the content alignment for a column.
WLength	getColumnWidth(int column)	Returns the column width.
protected WWidget	getCreatePageNavigationBar()	Returns a page navigation widget.
abstract int	getCurrentPage()	Returns the current page.
EnumSet<EditOption>	getEditOptions()	Returns the editing options.
EnumSet<EditTrigger>	getEditTriggers()	Returns the editing triggers.
EnumSet<DropLocation>	getEnabledDropLocations()	Returns the enabled drop locations.
WLength	getHeaderHeight()	Returns the header height.
WAbstractItemDelegate	getHeaderItemDelegate()	Returns the header item delegate.
WAbstractItemDelegate	getItemDelegate()	Returns the default item delegate.
WAbstractItemDelegate	getItemDelegate(int column)	Returns the delegate for a column.
WAbstractItemDelegate	getItemDelegate(WModelIndex index)	Returns the delegate for rendering an item.
WAbstractItemDelegate	getItemDelegateForColumn(int column)	Returns the delegate that was set for a column.
WAbstractItemModel	getModel()	Returns the model.
abstract int	getPageCount()	Returns the number of pages.
abstract int	getPageSize()	Returns the page size.
WModelIndex	getRootIndex()	Returns the root index.
int	getRowHeaderCount()	Returns the number of columns that are used as row headers.
WLength	getRowHeight()	Returns the row height.
SortedSet<WModelIndex>	getSelectedIndexes()	Returns the set of selected items.
SelectionBehavior	getSelectionBehavior()	Returns the selection behaviour.
SelectionMode	getSelectionMode()	Returns the selection mode.
WItemSelectionModel	getSelectionModel()	Returns the selection model.
int	getSortColumn()	Returns the current sorting columm.
SortOrder	getSortOrder()	Returns the current sorting order.
protected void	handleTouchEnd(List<WModelIndex> indices, WTouchEvent event)	Handles a touch ended event.
protected void	handleTouchMove(List<WModelIndex> indices, WTouchEvent event)	Handles a touch moved event.
protected void	handleTouchSelect(List<WModelIndex> indices, WTouchEvent event)	Handles a touch select event.
protected void	handleTouchStart(List<WModelIndex> indices, WTouchEvent event)	Handles a touch started event.
boolean	hasAlternatingRowColors()	Returns whether alternating row colors are used.
Signal2<Integer,WMouseEvent>	headerClicked()	Signal emitted when a header item is clicked.
Signal2<Integer,WMouseEvent>	headerDoubleClicked()	Signal emitted when a header item is double clicked.
Signal2<Integer,WMouseEvent>	headerMouseWentDown()	Signal emitted when a mouse button is pressed on a header item
Signal2<Integer,WMouseEvent>	headerMouseWentUp()	Signal emitted when a mouse button is released on a header item
void	hideColumn(int column)	Hides a column.
AlignmentFlag	horizontalHeaderAlignment(int column)	Returns the horizontal header alignment for a column.
boolean	isColumnHidden(int column)	Returns if a column is hidden.
boolean	isColumnResizeEnabled()	Returns whether column resizing is enabled.
boolean	isEditing(WModelIndex index)	Returns whether an editor is open for a given index.
boolean	isSelected(WModelIndex index)	Returns wheter an item is selected.
boolean	isSortEnabled()	Returns whether the view is sortable.
boolean	isSortingEnabled()	Returns whether sorting is enabled.
boolean	isSortingEnabled(int column)	Returns whether sorting is enabled for a single column.
boolean	isValid(WModelIndex index)	Returns whether an editor's state is valid.
abstract WWidget	itemWidget(WModelIndex index)	Returns the widget that renders an item.
EventSignal1<WKeyEvent>	keyPressed()	Event signal emitted when a "character" was entered.
EventSignal1<WKeyEvent>	keyWentDown()	Event signal emitted when a keyboard key is pushed down.
EventSignal1<WKeyEvent>	keyWentUp()	Event signal emitted when a keyboard key is released.
protected void	modelHeaderDataChanged(Orientation orientation, int start, int end)
Signal2<WModelIndex,WMouseEvent>	mouseWentDown()	Signal emitted when a mouse button is pressed down.
Signal2<WModelIndex,WMouseEvent>	mouseWentUp()	Signal emitted when the mouse button is released.
Signal	pageChanged()	Signal emitted when page information was updated.
void	remove()	Destructor.
abstract EventSignal1<WScrollEvent>	scrolled()	Signal emitted when scrolling.
final void	scrollTo(WModelIndex index)	Scrolls the view to an item.
abstract void	scrollTo(WModelIndex index, ScrollHint hint)	Scrolls the view to an item.
final void	select(WModelIndex index)	Selects a single item.
void	select(WModelIndex index, SelectionFlag option)	Selects a single item.
Signal	selectionChanged()	Signal emitted when the selection is changed.
void	setAlternatingRowColors(boolean enable)	Sets if alternating row colors are to be used.
void	setColumnAlignment(int column, AlignmentFlag alignment)	Sets the content alignment for a column.
void	setColumnHidden(int column, boolean hidden)	Changes the visibility of a column.
void	setColumnResizeEnabled(boolean enabled)	Enables interactive column resizing.
abstract void	setColumnWidth(int column, WLength width)	Sets the column width.
abstract void	setCurrentPage(int page)	Sets the current page.
void	setDragEnabled(boolean enable)	Enables the selection to be dragged (drag & drop).
void	setDropsEnabled(boolean enable)	Deprecated. Use setEnabledDropLocations() instead.
final void	setEditOptions(EditOption editOption, EditOption... editOptions)	Configures editing options.
void	setEditOptions(EnumSet<EditOption> editOptions)	Configures editing options.
final void	setEditTriggers(EditTrigger editTrigger, EditTrigger... editTriggers)	Configures what actions should trigger editing.
void	setEditTriggers(EnumSet<EditTrigger> editTriggers)	Configures what actions should trigger editing.
final void	setEnabledDropLocations(DropLocation dropLocation, DropLocation... dropLocations)	Enables drop operations (drag & drop).
void	setEnabledDropLocations(EnumSet<DropLocation> dropLocations)	Enables drop operations (drag & drop).
final void	setHeaderAlignment(int column, AlignmentFlag alignmen, AlignmentFlag... alignment)	Sets the header alignment for a column.
void	setHeaderAlignment(int column, EnumSet<AlignmentFlag> alignment)	Sets the header alignment for a column.
void	setHeaderClickSortEnabled(boolean enabled)	Alow to sort.
void	setHeaderHeight(WLength height)	Sets the header height.
void	setHeaderItemDelegate(WAbstractItemDelegate delegate)	Sets the header item delegate.
void	setHeaderWordWrap(int column, boolean enabled)	Configures header text wrapping.
void	setItemDelegate(WAbstractItemDelegate delegate)	Sets the default item delegate.
void	setItemDelegateForColumn(int column, WAbstractItemDelegate delegate)	Sets the delegate for a column.
void	setModel(WAbstractItemModel model)	Sets the model.
void	setRootIndex(WModelIndex rootIndex)	Sets the root index.
void	setRowHeaderCount(int count)	Configures the number of columns that are used as row headers.
void	setRowHeight(WLength rowHeight)	Sets the row height.
void	setSelectedIndexes(SortedSet<WModelIndex> indexes)	Sets the selected items.
void	setSelectionBehavior(SelectionBehavior behavior)	Changes the selection behaviour.
void	setSelectionMode(SelectionMode mode)	Sets the selection mode.
void	setSortingEnabled(boolean enabled)	Enables or disables sorting for all columns.
void	setSortingEnabled(int column, boolean enabled)	Enables or disables sorting for a single column.
protected boolean	shiftEditorColumns(WModelIndex parent, int start, int count, boolean persistWhenShifted)
protected boolean	shiftEditorRows(WModelIndex parent, int start, int count, boolean persistWhenShifted)
void	showColumn(int column)	Shows a column.
void	sortByColumn(int column, SortOrder order)	Sorts the data according to a column.
Signal2<List<WModelIndex>,WTouchEvent>	touchEnded()	Signal emitted when one or more fingers are removed from the screen.
Signal2<List<WModelIndex>,WTouchEvent>	touchMoved()	Signal emitted when one or more fingers are moved on the screen.
Signal2<WModelIndex,WTouchEvent>	touchStart()	Deprecated. Use touchStarted() instead.
Signal2<List<WModelIndex>,WTouchEvent>	touchStarted()	Signal emitted when one or more fingers are placed on the screen.
ValidationState	validateEditor(WModelIndex index)	Validates the editor for the given index.
ValidationState	validateEditors()	Validates all editors.
AlignmentFlag	verticalHeaderAlignment(int column)	Returns the vertical header alignment for a column.

Methods inherited from class eu.webtoolkit.jwt.WCompositeWidget

addStyleClass, boxBorder, boxPadding, callJavaScriptMember, doJavaScript, find, findById, getAttributeValue, getBaseZIndex, getChildren, getClearSides, getDecorationStyle, getFloatSide, getHeight, getId, getImplementation, getJavaScriptMember, getLineHeight, getMargin, getMaximumHeight, getMaximumWidth, getMinimumHeight, getMinimumWidth, getObjectName, getOffset, getPositionScheme, getScrollVisibilityMargin, getStyleClass, getTabIndex, getTakeImplementation, getToolTip, getVerticalAlignment, getVerticalAlignmentLength, getWidth, hasFocus, hasStyleClass, isCanReceiveFocus, isDisabled, isEnabled, isHidden, isHiddenKeepsGeometry, isInline, isLoaded, isPopup, isScrollVisibilityEnabled, isScrollVisible, isSetFirstFocus, isThemeStyleEnabled, isVisible, load, propagateSetEnabled, propagateSetVisible, refresh, removeStyleClass, removeWidget, render, resize, scrollVisibilityChanged, setAttributeValue, setCanReceiveFocus, setClearSides, setDecorationStyle, setDeferredToolTip, setDisabled, setFloatSide, setFocus, setHidden, setHiddenKeepsGeometry, setId, setImplementation, setInline, setJavaScriptMember, setLineHeight, setMargin, setMaximumSize, setMinimumSize, setObjectName, setOffsets, setPopup, setPositionScheme, setScrollVisibilityEnabled, setScrollVisibilityMargin, setSelectable, setStyleClass, setTabIndex, setThemeStyleEnabled, setToolTip, setVerticalAlignment

Methods inherited from class eu.webtoolkit.jwt.WWidget

acceptDrops, acceptDrops, addCssRule, addCssRule, addJSignal, addStyleClass, animateHide, animateShow, createJavaScript, disable, dropEvent, enable, getDropTouch, getJsRef, getParent, hide, htmlText, isExposed, isGlobalWidget, isLayoutSizeAware, isRendered, layoutSizeChanged, needsRerender, positionAt, positionAt, removeFromParent, removeStyleClass, render, resize, scheduleRender, scheduleRender, scheduleRender, setClearSides, setDeferredToolTip, setFocus, setHeight, setHidden, setLayoutSizeAware, setMargin, setMargin, setMargin, setMargin, setMargin, setOffsets, setOffsets, setOffsets, setOffsets, setOffsets, setToolTip, setVerticalAlignment, setWidth, show, stopAcceptDrops, toggleStyleClass, toggleStyleClass, tr

Methods inherited from class eu.webtoolkit.jwt.WObject

setFormData

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

enabledDropLocations_

protected EnumSet<DropLocation> enabledDropLocations_

uDragWidget_

protected WWidget uDragWidget_

Constructor Details

WAbstractItemView

protected WAbstractItemView(WContainerWidget parentContainer)

Creates a new item view.

WAbstractItemView

protected WAbstractItemView()

Creates a new item view.

Calls this((WContainerWidget)null)

Method Details

remove

public void remove()

Description copied from class: WWidget

Destructor.

Deletes a widget and all contained contents.

Overrides:

remove in class WCompositeWidget

See Also:

• WWidget.removeWidget(WWidget widget)

setModel

public void setModel(WAbstractItemModel model)

Sets the model.

The View will display data of the given model and changes in the model are reflected by the View.

The initial model is null.

See Also:

• setRootIndex(WModelIndex rootIndex)

getModel

public WAbstractItemModel getModel()

Returns the model.

See Also:

• setModel(WAbstractItemModel model)

setRootIndex

public void setRootIndex(WModelIndex rootIndex)

Sets the root index.

The root index is the model index that is considered the root node. This node itself is not rendered, but its children are.

The default value is null, corresponding to the model's root node.

See Also:

• setModel(WAbstractItemModel model)

getRootIndex

public WModelIndex getRootIndex()

Returns the root index.

See Also:

• setRootIndex(WModelIndex rootIndex)

setItemDelegate

public void setItemDelegate(WAbstractItemDelegate delegate)

Sets the default item delegate.

The previous delegate is not deleted. This item delegate is for all columns for which no specific item delegate is set.

The default item delegate is a WItemDelegate.

See Also:

• setItemDelegateForColumn(int column, WAbstractItemDelegate delegate)

getItemDelegate

public WAbstractItemDelegate getItemDelegate()

Returns the default item delegate.

See Also:

• setItemDelegate(WAbstractItemDelegate delegate)

setItemDelegateForColumn

public void setItemDelegateForColumn(int column,
 WAbstractItemDelegate delegate)

Sets the delegate for a column.

A delegate previously set (if any) is not deleted.

See Also:

• setItemDelegate(WAbstractItemDelegate delegate)

getItemDelegateForColumn

public WAbstractItemDelegate getItemDelegateForColumn(int column)

Returns the delegate that was set for a column.

Returns null if no delegate was set for the column.

See Also:

• setItemDelegateForColumn(int column, WAbstractItemDelegate delegate)

getItemDelegate

public WAbstractItemDelegate getItemDelegate(WModelIndex index)

Returns the delegate for rendering an item.

See Also:

• setItemDelegateForColumn(int column, WAbstractItemDelegate delegate)
• setItemDelegate(WAbstractItemDelegate delegate)

getItemDelegate

public WAbstractItemDelegate getItemDelegate(int column)

Returns the delegate for a column.

Returns either the delegate that was set for the column, or the default delegate.

itemWidget

public abstract WWidget itemWidget(WModelIndex index)

Returns the widget that renders an item.

This returns the widget that renders the given item. This may return 0 if the item is currently not rendered.

This widget has been created by an item delegate, and usually an item delegate is involved when updating it.

setHeaderItemDelegate

public void setHeaderItemDelegate(WAbstractItemDelegate delegate)

Sets the header item delegate.

This item delegate is used for rendering items in the header.

The previous delegate is not deleted. This item delegate is for all columns for which no specific item delegate is set.

The default item delegate is a WItemDelegate.

getHeaderItemDelegate

public WAbstractItemDelegate getHeaderItemDelegate()

Returns the header item delegate.

See Also:

• setHeaderItemDelegate(WAbstractItemDelegate delegate)

setColumnAlignment

public void setColumnAlignment(int column,
 AlignmentFlag alignment)

Sets the content alignment for a column.

The default value is AlignmentFlag.Left.

See Also:

• setHeaderAlignment(int column, EnumSet alignment)

getColumnAlignment

public AlignmentFlag getColumnAlignment(int column)

Returns the content alignment for a column.

See Also:

• setColumnAlignment(int column, AlignmentFlag alignment)

setHeaderAlignment

public void setHeaderAlignment(int column,
 EnumSet<AlignmentFlag> alignment)

Sets the header alignment for a column.

The default alignemnt is horizontally left, and vertically centered. (AlignmentFlag.Left | AlignmentFlag.Middle).

Valid options for horizontal alignment are AlignmentFlag.Left, AlignmentFlag.Center or AlignmentFlag.Right.

Valid options for vertical alignment are AlignmentFlag.Middle or AlignmentFlag.Top. In the latter case, other contents may be added below the label in createExtraHeaderWidget().

See Also:

• setColumnAlignment(int column, AlignmentFlag alignment)

setHeaderAlignment

public final void setHeaderAlignment(int column,
 AlignmentFlag alignmen,
 AlignmentFlag... alignment)

Sets the header alignment for a column.

Calls setHeaderAlignment(column, EnumSet.of(alignmen, alignment))

horizontalHeaderAlignment

public AlignmentFlag horizontalHeaderAlignment(int column)

Returns the horizontal header alignment for a column.

See Also:

• setHeaderAlignment(int column, EnumSet alignment)

verticalHeaderAlignment

public AlignmentFlag verticalHeaderAlignment(int column)

Returns the vertical header alignment for a column.

See Also:

• setHeaderAlignment(int column, EnumSet alignment)

setHeaderWordWrap

public void setHeaderWordWrap(int column,
 boolean enabled)

Configures header text wrapping.

This setting only affects a multiline header, and the default value is true. When set to false, the header itself will not wrap (as with a vertically centered header), and thus extra widgets will not shift down when there is a long header label.

setAlternatingRowColors

public void setAlternatingRowColors(boolean enable)

Sets if alternating row colors are to be used.

Configure whether rows get alternating background colors, defined by the current CSS theme.

The default value is false.

hasAlternatingRowColors

public boolean hasAlternatingRowColors()

Returns whether alternating row colors are used.

When enabled, rows are displayed in alternating row colors, according to the current theme's definition.

See Also:

• setAlternatingRowColors(boolean enable)

sortByColumn

public void sortByColumn(int column,
 SortOrder order)

Sorts the data according to a column.

Sorts the data according to data in column column and sort order order .

The default sorting column is -1: the model is unsorted.

See Also:

• WAbstractItemModel.sort(int column, SortOrder order)

getSortColumn

public int getSortColumn()

Returns the current sorting columm.

See Also:

• sortByColumn(int column, SortOrder order)
• getSortOrder()

getSortOrder

public SortOrder getSortOrder()

Returns the current sorting order.

See Also:

• sortByColumn(int column, SortOrder order)
• getSortColumn()

setSortingEnabled

public void setSortingEnabled(boolean enabled)

Enables or disables sorting for all columns.

Enable or disable sorting by the user on all columns.

Sorting is enabled by default.

See Also:

• WAbstractItemModel.sort(int column, SortOrder order)

setSortingEnabled

public void setSortingEnabled(int column,
 boolean enabled)

Enables or disables sorting for a single column.

Enable or disable sorting by the user for a specific column.

Sorting is enabled by default.

See Also:

• WAbstractItemModel.sort(int column, SortOrder order)

isSortingEnabled

public boolean isSortingEnabled()

Returns whether sorting is enabled.

See Also:

• setSortingEnabled(boolean enabled)

isSortingEnabled

public boolean isSortingEnabled(int column)

Returns whether sorting is enabled for a single column.

See Also:

• setSortingEnabled(boolean enabled)

setColumnResizeEnabled

public void setColumnResizeEnabled(boolean enabled)

Enables interactive column resizing.

Enable or disable column resize handles for interactive resizing of the columns.

Column resizing is enabled by default when JavaScript is available.

See Also:

• setColumnResizeEnabled(boolean enabled)

isColumnResizeEnabled

public boolean isColumnResizeEnabled()

Returns whether column resizing is enabled.

See Also:

• setColumnResizeEnabled(boolean enabled)

setSelectionBehavior

public void setSelectionBehavior(SelectionBehavior behavior)

Changes the selection behaviour.

The selection behavior indicates whether whole rows or individual items can be selected. It is a property of the getSelectionModel().

By default, selection operates on rows (SelectionBehavior.Rows), in which case model indexes will always be in the first column (column null).

Alternatively, you can allow selection for individual items (SelectionBehavior.Items)

See Also:

• WItemSelectionModel.setSelectionBehavior(SelectionBehavior behavior)
• setSelectionMode(SelectionMode mode)

getSelectionBehavior

public SelectionBehavior getSelectionBehavior()

Returns the selection behaviour.

See Also:

• setSelectionBehavior(SelectionBehavior behavior)

setSelectionMode

public void setSelectionMode(SelectionMode mode)

Sets the selection mode.

By default selection is disabled (SelectionMode.None).

See Also:

• setSelectionBehavior(SelectionBehavior behavior)

getSelectionMode

public SelectionMode getSelectionMode()

Returns the selection mode.

See Also:

• setSelectionMode(SelectionMode mode)

getSelectionModel

public WItemSelectionModel getSelectionModel()

Returns the selection model.

The selection model keeps track of the currently selected items.

setSelectedIndexes

public void setSelectedIndexes(SortedSet<WModelIndex> indexes)

Sets the selected items.

Replaces the current selection with indexes.

When selection operates on rows (SelectionBehavior.Rows), it is sufficient to pass the first element in a row (column null ) to select the entire row.

See Also:

• select(WModelIndex index, SelectionFlag option)
• getSelectionModel()

clearSelection

public void clearSelection()

Clears the selection.

See Also:

• setSelectedIndexes(SortedSet indexes)

select

public void select(WModelIndex index,
 SelectionFlag option)

Selects a single item.

See Also:

• setSelectedIndexes(SortedSet indexes)
• getSelectionModel()

select

public final void select(WModelIndex index)

Selects a single item.

Calls select(index, SelectionFlag.Select)

isSelected

public boolean isSelected(WModelIndex index)

Returns wheter an item is selected.

When selection operates on rows (SelectionBehavior.Rows), this method returns true for each element in a selected row.

This is a convenience method for:

 selectionModel().isSelected(index)

 

See Also:

• getSelectedIndexes()
• select(WModelIndex index, SelectionFlag option)
• getSelectionModel()

getSelectedIndexes

public SortedSet<WModelIndex> getSelectedIndexes()

Returns the set of selected items.

The model indexes are returned as a set, topologically ordered (in the order they appear in the view).

When selection operates on rows (SelectionBehavior.Rows), this method only returns the model index of first column's element of the selected rows.

This is a convenience method for:

 selectionModel().selectedIndexes()

 

See Also:

• setSelectedIndexes(SortedSet indexes)

setDragEnabled

public void setDragEnabled(boolean enable)

Enables the selection to be dragged (drag & drop).

To enable dragging of the selection, you first need to enable selection using setSelectionMode().

Whether an individual item may be dragged is controlled by the item's ItemFlag.DragEnabled flag. The selection can be dragged only if all items currently selected can be dragged.

See Also:

• setDropsEnabled(boolean enable)

setDropsEnabled

public void setDropsEnabled(boolean enable)

Deprecated.

Use setEnabledDropLocations() instead. This method now enables DropLocation.OnItem.

Enables drop operations (drag & drop).

When drop is enabled, the tree view will indicate that something may be dropped when the mime-type of the dragged object is compatible with one of the model's accepted drop mime-types (see WAbstractItemModel.getAcceptDropMimeTypes()) or this widget's accepted drop mime-types (see WWidget#acceptDrops()), and the target item has drop enabled (which is controlled by the item's ItemFlag.DropEnabled flag).

Drop events must be handled in dropEvent().

See Also:

• setDragEnabled(boolean enable)

setEnabledDropLocations

public void setEnabledDropLocations(EnumSet<DropLocation> dropLocations)

Enables drop operations (drag & drop).

When drop is enabled, the tree view will indicate that something may be dropped when the mime-type of the dragged object is compatible with one of the model's accepted drop mime-types (see WAbstractItemModel.getAcceptDropMimeTypes()) or this widget's accepted drop mime-types (see WWidget#acceptDrops()).

When DropLocation.OnItem is enabled, the view will allow drops on items that have the ItemFlag.DropEnabled flag set. When DropLocation.BetweenRows is enabled, the view will indicate that something may be dropped between any two rows. When DropLocation.OnItem and DropLocation.BetweenRows are both enabled, the drop indication differs depending on whether ItemFlag.DropEnabled is set on the item.

Drop events must be handled in dropEvent().

setEnabledDropLocations

public final void setEnabledDropLocations(DropLocation dropLocation,
 DropLocation... dropLocations)

Enables drop operations (drag & drop).

Calls setEnabledDropLocations(EnumSet.of(dropLocation, dropLocations))

getEnabledDropLocations

public EnumSet<DropLocation> getEnabledDropLocations()

Returns the enabled drop locations.

setRowHeight

public void setRowHeight(WLength rowHeight)

Sets the row height.

The view renders all rows with a same height. This method configures this row height.

The default value is 20 pixels.

Note: The height must be specified in LengthUnit.Pixel units.

See Also:

• setColumnWidth(int column, WLength width)

getRowHeight

public WLength getRowHeight()

Returns the row height.

setColumnWidth

public abstract void setColumnWidth(int column,
 WLength width)

Sets the column width.

The default column width is 150 pixels.

Note: The width must be specified in LengthUnit.Pixel units.

Note: The actual space occupied by each column is the column width augmented by 7 pixels for internal padding and a border.

getColumnWidth

public WLength getColumnWidth(int column)

Returns the column width.

See Also:

• setColumnWidth(int column, WLength width)

setColumnHidden

public void setColumnHidden(int column,
 boolean hidden)

Changes the visibility of a column.

See Also:

• isColumnHidden(int column)

isColumnHidden

public boolean isColumnHidden(int column)

Returns if a column is hidden.

See Also:

• setColumnHidden(int column, boolean hidden)

hideColumn

public void hideColumn(int column)

Hides a column.

See Also:

• showColumn(int column)
• setColumnHidden(int column, boolean hidden)

showColumn

public void showColumn(int column)

Shows a column.

See Also:

• hideColumn(int column)
• setColumnHidden(int column, boolean hidden)

setHeaderHeight

public void setHeaderHeight(WLength height)

Sets the header height.

The default value is 20 pixels.

Note: The height must be specified in LengthUnit.Pixel units.

getHeaderHeight

public WLength getHeaderHeight()

Returns the header height.

See Also:

• setHeaderHeight(WLength height)

getPageCount

public abstract int getPageCount()

Returns the number of pages.

When Ajax/JavaScript is not available, the view will use a paging navigation bar to allow scrolling through the data. This returns the number of pages currently shown.

See Also:

• getCreatePageNavigationBar()
• pageChanged()

getPageSize

public abstract int getPageSize()

Returns the page size.

When Ajax/JavaScript is not available, the view will use a paging navigation bar to allow scrolling through the data. This returns the number of items per page.

See Also:

• getCreatePageNavigationBar()
• pageChanged()

getCurrentPage

public abstract int getCurrentPage()

Returns the current page.

When Ajax/JavaScript is not available, the view will use a paging navigation bar to allow scrolling through the data. This returns the current page (between 0 and getPageCount() - 1).

See Also:

• getCreatePageNavigationBar()
• pageChanged()

setCurrentPage

public abstract void setCurrentPage(int page)

Sets the current page.

When Ajax/JavaScript is not available, the view will use a paging navigation bar to allow scrolling through the data. This method can be used to change the current page.

See Also:

• getCreatePageNavigationBar()
• pageChanged()

scrollTo

public abstract void scrollTo(WModelIndex index,
 ScrollHint hint)

Scrolls the view to an item.

Scrolls the view to ensure that the item which represents the provided index is visible. A hint may indicate how the item should appear in the viewport (if possible).

Note: Currently only implemented to scroll to the correct row, not taking into account the column.

scrollTo

public final void scrollTo(WModelIndex index)

Scrolls the view to an item.

Calls scrollTo(index, ScrollHint.EnsureVisible)

setEditTriggers

public void setEditTriggers(EnumSet<EditTrigger> editTriggers)

Configures what actions should trigger editing.

The default value is DoubleClicked.

See Also:

• edit(WModelIndex index)

setEditTriggers

public final void setEditTriggers(EditTrigger editTrigger,
 EditTrigger... editTriggers)

Configures what actions should trigger editing.

Calls setEditTriggers(EnumSet.of(editTrigger, editTriggers))

getEditTriggers

public EnumSet<EditTrigger> getEditTriggers()

Returns the editing triggers.

See Also:

• setEditTriggers(EnumSet editTriggers)

setEditOptions

public void setEditOptions(EnumSet<EditOption> editOptions)

Configures editing options.

The default value is SingleEditor;

setEditOptions

public final void setEditOptions(EditOption editOption,
 EditOption... editOptions)

Configures editing options.

Calls setEditOptions(EnumSet.of(editOption, editOptions))

getEditOptions

public EnumSet<EditOption> getEditOptions()

Returns the editing options.

See Also:

• setEditOptions(EnumSet editOptions)

edit

public void edit(WModelIndex index)

Opens an editor for the given index.

Unless multiple editors are enabled, any other open editor is closed first.

See Also:

• setEditTriggers(EnumSet editTriggers)
• setEditOptions(EnumSet editOptions)
• closeEditor(WModelIndex index, boolean saveData)

closeEditor

public void closeEditor(WModelIndex index,
 boolean saveData)

Closes the editor for the given index.

If saveData is true, then the currently edited value is saved first to the model.

See Also:

• edit(WModelIndex index)

closeEditor

public final void closeEditor(WModelIndex index)

Closes the editor for the given index.

Calls closeEditor(index, true)

closeEditors

public void closeEditors(boolean saveData)

Closes all open editors.

If saveData is true, then the currently edited values are saved to the model before closing the editor.

See Also:

• closeEditor(WModelIndex index, boolean saveData)

closeEditors

public final void closeEditors()

Closes all open editors.

Calls closeEditors(true)

validateEditor

public ValidationState validateEditor(WModelIndex index)

Validates the editor for the given index.

Validation is done by invoking WAbstractItemDelegate#validate().

validateEditors

public ValidationState validateEditors()

Validates all editors.

See Also:

• validateEditor(WModelIndex index)

isEditing

public boolean isEditing(WModelIndex index)

Returns whether an editor is open for a given index.

See Also:

• edit(WModelIndex index)

isValid

public boolean isValid(WModelIndex index)

Returns whether an editor's state is valid.

clicked

public Signal2<WModelIndex,WMouseEvent> clicked()

Signal emitted when clicked.

When the event happened over an item, the first argument indicates the item that was clicked on.

See Also:

• doubleClicked()

doubleClicked

public Signal2<WModelIndex,WMouseEvent> doubleClicked()

Signal emitted when double clicked.

When the event happened over an item, the first argument indicates the item that was double clicked on.

See Also:

• clicked()

mouseWentDown

public Signal2<WModelIndex,WMouseEvent> mouseWentDown()

Signal emitted when a mouse button is pressed down.

This signal is emitted only when 'over' an item (the model index is passed as first argument is never invalid).

See Also:

• mouseWentUp()

mouseWentUp

public Signal2<WModelIndex,WMouseEvent> mouseWentUp()

Signal emitted when the mouse button is released.

When the event happened over an item, the first argument indicates the item where the mouse went up.

See Also:

• mouseWentDown()

touchStart

public Signal2<WModelIndex,WTouchEvent> touchStart()

Deprecated.

Use touchStarted() instead.

Signal emitted when a finger is placed on the screen.

When the event happened over an item, the first argument indicates the item that was touched.

touchStarted

public Signal2<List<WModelIndex>,WTouchEvent> touchStarted()

Signal emitted when one or more fingers are placed on the screen.

When the event happened over an item, the first argument indicates the items that were touched. The indices in the model index vector match the indices in the WTouchEvent.getChangedTouches().

touchMoved

public Signal2<List<WModelIndex>,WTouchEvent> touchMoved()

Signal emitted when one or more fingers are moved on the screen.

When the event happened over an item, the first argument indicates the items that were touched. The indices in the model index vector match the indices in the WTouchEvent.getChangedTouches().

touchEnded

public Signal2<List<WModelIndex>,WTouchEvent> touchEnded()

Signal emitted when one or more fingers are removed from the screen.

When the event happened over an item, the first argument indicates the items where the touch ended. The indices in the model index vector match the indices in the WTouchEvent.getChangedTouches().

Note: When JavaScript is disabled, the signal will never fire.

selectionChanged

public Signal selectionChanged()

Signal emitted when the selection is changed.

See Also:

• select(WModelIndex index, SelectionFlag option)
• setSelectionMode(SelectionMode mode)
• setSelectionBehavior(SelectionBehavior behavior)

pageChanged

public Signal pageChanged()

Signal emitted when page information was updated.

When Ajax/JavaScript is not available, the view will use a paging navigation bar to allow scrolling through the data. This signal is emitted when page-related information changed (e.g. the current page was changed, or the number of rows was changed).

See Also:

• getCreatePageNavigationBar()

columnResized

public Signal2<Integer,WLength> columnResized()

Returns the signal emitted when a column is resized by the user.

The arguments of the signal are: the column index and the new width of the column.

isSortEnabled

public boolean isSortEnabled()

Returns whether the view is sortable.

When enabeld the view can be sorted by clicking on the header.

setHeaderClickSortEnabled

public void setHeaderClickSortEnabled(boolean enabled)

Alow to sort.

When enabeld the view can be sorted by clicking on the header.

headerClicked

public Signal2<Integer,WMouseEvent> headerClicked()

Signal emitted when a header item is clicked.

The argument that is passed is the column number.

See Also:

• clicked()

headerDoubleClicked

public Signal2<Integer,WMouseEvent> headerDoubleClicked()

Signal emitted when a header item is double clicked.

The argument that is passed is the column number.

See Also:

• doubleClicked()
• headerClicked()

headerMouseWentDown

public Signal2<Integer,WMouseEvent> headerMouseWentDown()

Signal emitted when a mouse button is pressed on a header item

The argument that is passed is the column number.

headerMouseWentUp

public Signal2<Integer,WMouseEvent> headerMouseWentUp()

Signal emitted when a mouse button is released on a header item

The argument that is passed is the column number.

See Also:

• headerMouseWentDown()

scrolled

public abstract EventSignal1<WScrollEvent> scrolled()

Signal emitted when scrolling.

Note: Works only if ajax is available.

setRowHeaderCount

public void setRowHeaderCount(int count)

Configures the number of columns that are used as row headers.

An item view does not use the vertical header data from the model in any way, but instead you can configure data in the first column(s) to be used as a row headers.

These columns will not scroll horizontally together with the rest of the model.

The default value is 0.

Note: Currently, this property must be set before any other settings of the view and only a value of 0 or 1 is supported.

getRowHeaderCount

public int getRowHeaderCount()

Returns the number of columns that are used as row headers.

See Also:

• setRowHeaderCount(int count)

keyWentDown

public EventSignal1<WKeyEvent> keyWentDown()

Event signal emitted when a keyboard key is pushed down.

The keyWentDown signal is the first signal emitted when a key is pressed (before the keyPressed signal). Unlike keyPressed() however it is also emitted for modifier keys (such as "shift", "control", ...) or keyboard navigation keys that do not have a corresponding character.

See Also:

• keyPressed()
• keyWentUp()

keyPressed

public EventSignal1<WKeyEvent> keyPressed()

Event signal emitted when a "character" was entered.

The keyPressed signal is emitted when a key is pressed, and a character is entered. Unlike keyWentDown(), it is emitted only for key presses that result in a character being entered, and thus not for modifier keys or keyboard navigation keys.

See Also:

• keyWentDown()

keyWentUp

public EventSignal1<WKeyEvent> keyWentUp()

Event signal emitted when a keyboard key is released.

This is the counter-part of the keyWentDown() event. Every key-down has its corresponding key-up.

See Also:

• keyWentDown()

dropEvent

protected void dropEvent(WDropEvent e,
 WModelIndex index)

Handles a drop event (drag & drop).

The event object contains details about the drop operation, identifying the source (which provides the data) and the mime-type of the data. The drop was received on the target item.

The drop event can be handled either by the view itself, or by the model. The default implementation checks if the mime-type is accepted by the model, and if so passes the drop event to the model. If the source is the view's own selection model, then the drop event will be handled as a DropAction.Move, otherwise the drop event will be handled as a DropAction.Copy.

See Also:

• WAbstractItemModel.dropEvent(WDropEvent e, DropAction action, int row, int column, WModelIndex parent)

dropEvent

protected void dropEvent(WDropEvent e,
 WModelIndex index,
 Side side)

Handles a drop event (drag & drop).

The event object contains details about the drop operation, identifying the source (which provides the data) and the mime-type of the data. The drop was received relative to the index item and the side parameter will only be Wt::Top or Wt::Bottom.

A drop below the lowest item or on an empty view will result in a call to this method with an invalid index and side Wt::Bottom.

The drop event can be handled either by the view itself, or by the model. The default implementation checks if the mime-type is accepted by the model, and if so passes the drop event to the model as a DropAction.Move.

See Also:

• WAbstractItemModel.dropEvent(WDropEvent e, DropAction action, int row, int column, WModelIndex parent)

createExtraHeaderWidget

protected WWidget createExtraHeaderWidget(int column)

Create an extra widget in the header.

You may reimplement this method to provide an extra widget to be placed below the header label. The extra widget will be visible only if a multi-line header is configured using setHeaderHeight().

The widget is created only once, but this method may be called repeatedly for a column for which prior calls returned null (i.e. each time the header is rerendered).

The default implementation returns null.

See Also:

• setHeaderHeight(WLength height)
• extraHeaderWidget(int column)

extraHeaderWidget

protected WWidget extraHeaderWidget(int column)

Returns the extra header widget.

Returns the widget previously created using createExtraHeaderWidget()

See Also:

• createExtraHeaderWidget(int column)

getCreatePageNavigationBar

protected WWidget getCreatePageNavigationBar()

Returns a page navigation widget.

When Ajax/JavaScript is not available, the view will use a paging navigation bar to allow scrolling through the data, created by this method. The default implementation displays a simple navigation bar with (First, Prevous, Next, Last) buttons and a page counter.

You may want to reimplement this method to provide a custom page navigation bar. You can use the getCurrentPage(), getPageCount(), and setCurrentPage() methods to set or get the page information, and listen to the pageChanged() signal to react to changes.

modelHeaderDataChanged

protected void modelHeaderDataChanged(Orientation orientation,
 int start,
 int end)

createHeaderWidget

protected WWidget createHeaderWidget(int column)

handleTouchSelect

protected void handleTouchSelect(List<WModelIndex> indices,
 WTouchEvent event)

Handles a touch select event.

handleTouchStart

protected void handleTouchStart(List<WModelIndex> indices,
 WTouchEvent event)

Handles a touch started event.

handleTouchMove

protected void handleTouchMove(List<WModelIndex> indices,
 WTouchEvent event)

Handles a touch moved event.

handleTouchEnd

protected void handleTouchEnd(List<WModelIndex> indices,
 WTouchEvent event)

Handles a touch ended event.

enableAjax

protected void enableAjax()

Description copied from class: WWidget

Progresses to an Ajax-enabled widget.

This method is called when the progressive bootstrap method is used, and support for AJAX has been detected. The default behavior will upgrade the widget's event handling to use AJAX instead of full page reloads, and propagate the call to its children.

You may want to reimplement this method if you want to make changes to widget when AJAX is enabled. You should always call the base implementation.

Overrides:

enableAjax in class WCompositeWidget

See Also:

• WApplication.enableAjax()

shiftEditorRows

protected boolean shiftEditorRows(WModelIndex parent,
 int start,
 int count,
 boolean persistWhenShifted)

shiftEditorColumns

protected boolean shiftEditorColumns(WModelIndex parent,
 int start,
 int count,
 boolean persistWhenShifted)