Rogue Wave JViews Charts JavaScript Reference: Class IlvMenuItem

Class IlvMenuItem

IlvObject
   |
   +--IlvPanel
      |
      +--IlvMenuItem

Category:: Common component

JavaScript File:: IlvAbstractPopupMenu.js

Description:: This class implements menu items to compose a menu. It constructs a new IlvMenuItem with the specified label,isEnabled,action and image properties. properties. Note that the use of "-" in a label is reserved to indicate a separator between menu items. By default, all menu items are enabled, except separators.

See also:: IlvMenu

Constructor Summary
Constructor Attributes	Constructor Name and Description
	IlvMenuItem(label, isEnabled, action, image, path)

Method Summary
Method Attributes	Method Name and Description
	createHTMLContent(width, height) Generates the HTML representation of this menu item.
	getAction() Returns the action to trigger when this menu item is selected.
	getIcon() Retrieves the icon of this menu item.
	getIconPreferredSize() Returns the preferred size used by the icon of this menu item.
	getLabel() Retrieves the label of this menu item.
	getParent() Returns the parent of this menu item.
	getPreferredSize() Returns the preferred size for this menu item.
	getRoot() Returns the root `IlvMenu` instance for this menu item.
	isEnabled() Checks whether this menu item is enabled.
	isHighlighted() Checks whether this menu item is highlighted.
	isRoot() Returns `true` if this menu is of type `IlvMenu` and a root menu.
	onmouseover() Invoked each time the user moves the mouse over this menu item.
	onmouseup() Invoked each time the user clicks this menu item.
	performServerAction(actionName, params, updateAll) Performs a server action, using the action name and the parameters.
	recycle() Prepares this menu item to be recycled.
	setAction(action) Sets the action to trigger when this menu item is selected.
	setEnabled(isEnabled) Specifies whether this menu item can be chosen.
	setHighlighted(isHighlighted) Specifies whether this menu item is highlighted.
	setIcon(image) Sets the icon for this menu item to the specified image URL.
	setLabel(label) Sets the label for this menu item to the specified label.
	setLocation(left, top) Sets the location of this menu item.
	setPreferredSize(width, height) Sets the preferred size of this menu item.
	setSize(width, height) Sets the size of this menu item.
	setVisible(isVisible) Specifies whether this menu item is visible or not.
	update() Updates the content of the menu item.

Methods inherited from class IlvPanel
dispose, getBounds, getClip, getCursor, getHeight, getLeft, getMouseEventSource, getScrollPosition, getTop, getWidth, getZIndex, isVisible, setBackgroundColor, setBackgroundImage, setBounds, setClip, setCursor, setScrollPosition, setZIndex, translate

Methods inherited from class IlvObject
getClassName, hashCode, instanceOf, invoke, registerDispose, registerDisposeByClientId, removeHTML, setClassName, superConstructor, superInvoke, toString, updateVisibility

Constructor Detail

IlvMenuItem

IlvMenuItem(label, isEnabled, action, image, path)

Parameters:: label; isEnabled; action; image; path

Method Detail

createHTMLContent

createHTMLContent(width, height)

Generates the HTML representation of this menu item.

This method is invoked without any parameters by the getPreferredSize method to compute the best size for this menu item.

Parameters:: width; height

getAction

getAction()

Returns the action to trigger when this menu item is selected.

Returns:: The action.

getIcon

getIcon()

Retrieves the icon of this menu item.

Returns:: The icon of this menu item.

getIconPreferredSize

getIconPreferredSize()

Returns the preferred size used by the icon of this menu item.

getLabel

getLabel()

Retrieves the label of this menu item.

Returns:: The label of this menu item.

getParent

getParent()

Returns the parent of this menu item. The parent is an instance of IlvMenu. An instance of IlvMenuItem has always a parent. However, the root instance of IlvMenu returns null.

See also:: #isRoot; #getRoot

getPreferredSize

getPreferredSize()

Returns the preferred size for this menu item.

getRoot

getRoot()

Returns the root IlvMenu instance for this menu item.

See also:: #getParent; #isRoot

isEnabled

isEnabled()

Checks whether this menu item is enabled.

Returns:: true if the menu item is enabled; false if it is disabled.

isHighlighted

isHighlighted()

Checks whether this menu item is highlighted.

Returns:: true if the menu item is highlighted; otherwise, returns false.

isRoot

isRoot()

Returns true if this menu is of type IlvMenu and a root menu. If this menu is of type IlvMenuItem, or an IlvMenu that is a submenu, this method returns false.

See also:: #getParent; #getRoot

onmouseover

onmouseover()

Invoked each time the user moves the mouse over this menu item. This method highlights this menu item.

onmouseup

onmouseup()

Invoked each time the user clicks this menu item.

This method sends the action corresponding to this menu item to the server and refreshes the view. It can be modified/overridden to handle the action locally or in a different way.

performServerAction

performServerAction(actionName, params, updateAll)

Performs a server action, using the action name and the parameters. This method will call the performServerAction of the pop-up menu attached to the root menu of this menu item.

Parameters:: actionName - The server action name; params - The additional action parameters.; updateAll - Flag to determine whether update the image only or also the capabilities (if the view is compatible).

recycle

recycle()

Prepares this menu item to be recycled. We do this because we want to reuse the created DIV/LAYER objects rather than creating hundreds of them, which would be useless as soon as the pop-up menu has disappeared.

setAction

setAction(action)

Sets the action to trigger when this menu item is selected.

The action can either be a String or a function.

In the function signature has two parameters:

view The view on which this pop-up menu is displayed
item The menu item that was selected.

Parameters:: action - The action to set.

setEnabled

setEnabled(isEnabled)

Specifies whether this menu item can be chosen.

Parameters:: isEnabled - If true, the menu item is enabled; if false, the menu item is disabled.

setHighlighted

setHighlighted(isHighlighted)

Specifies whether this menu item is highlighted.

Parameters:: isHighlighted - If true, this menu item is highlighted.

setIcon

setIcon(image)

Sets the icon for this menu item to the specified image URL.

Parameters:: image - The new icon, or null for no icon.

setLabel

setLabel(label)

Sets the label for this menu item to the specified label.

Parameters:: label - The new label, or null for no label.

setLocation

setLocation(left, top)

Sets the location of this menu item. Only the location of the root menu has to be set, the location of any other menu item is computed automatically based on the root menu location and the size of the window.

Parameters:: left - The y coordinate of the top-left corner of the menu item.; top - The x coordinate of the top-left corner of the menu item.

setPreferredSize

setPreferredSize(width, height)

Sets the preferred size of this menu item. When the size can automatically be computed this information is not taken into account.

Parameters:: width; height

setSize

setSize(width, height)

Sets the size of this menu item.

Parameters:: width - The new width of this menu item.; height - The new height of this menu item.

setVisible

setVisible(isVisible)

Specifies whether this menu item is visible or not. Only the root menu has to be made visible; the visibility of any other menu item is modified automatically by the mouse events.

Parameters:: isVisible

update

update()

Updates the content of the menu item.