mxDefaultPopupMenu

Creates popupmenus for mouse events. This object holds an XML node which is a description of the popup menu to be created. In createMenu, the configuration is applied to the context and the resulting menu items are added to the menu dynamically. See createMenu for a description of the configuration format.

This class does not create the DOM nodes required for the popup menu, it only parses an XML description to invoke the respective methods on an mxPopupMenu each time the menu is displayed.

Codec

This class uses the mxDefaultPopupMenuCodec to read configuration data into an existing instance, however, the actual parsing is done by this class during program execution, so the format is described below.

Summary

mxDefaultPopupMenu	Creates popupmenus for mouse events.
Functions
mxDefaultPopupMenu	Constructs a new popupmenu-factory based on given configuration.
Variables
imageBasePath	Base path for all icon attributes in the config.
config	XML node used as the description of new menu items.
Functions
createMenu	This function is called from mxEditor to add items to the given menu based on config.
addItems	Recursively adds the given items and all of its children into the given menu.
addAction	Helper method to bind an action to a new menu item.
createConditions	Evaluates the default conditions for the given context.

Functions

mxDefaultPopupMenu

function mxDefaultPopupMenu( config )

Constructs a new popupmenu-factory based on given configuration.

Paramaters

config

XML node that contains the configuration data.

Variables

imageBasePath

mxDefaultPopupMenu.prototype.imageBasePath

Base path for all icon attributes in the config. Default is null.

config

mxDefaultPopupMenu.prototype.config

XML node used as the description of new menu items. This node is used in createMenu to dynamically create the menu items if their respective conditions evaluate to true for the given arguments.

Functions

createMenu

mxDefaultPopupMenu.prototype.createMenu = function( editor,
menu,
cell,
evt )

This function is called from mxEditor to add items to the given menu based on config. The config is a sequence of the following nodes and attributes.

Child Nodes

add	Adds a new menu item. See below for attributes.
separator	Adds a separator. No attributes.
condition	Adds a custom condition. Name attribute.

The add-node may have a child node that defines a function to be invoked before the action is executed (or instead of an action to be executed).

Attributes

as	Resource key for the label (needs entry in property file).
action	Name of the action to execute in enclosing editor.
icon	Optional icon (relative/absolute URL).
iconCls	Optional CSS class for the icon.
if	Optional name of condition that must be true(see below).
name	Name of custom condition. Only for condition nodes.

Conditions

nocell	No cell under the mouse.
ncells	More than one cell selected.
notRoot	Drilling position is other than home.
cell	Cell under the mouse.
notEmpty	Exactly one cell with children under mouse.
expandable	Exactly one expandable cell under mouse.
collapsable	Exactly one collapsable cell under mouse.
validRoot	Exactly one cell which is a possible root under mouse.
swimlane	Exactly one cell which is a swimlane under mouse.

Example

To add a new item for a given action to the popupmenu

<mxDefaultPopupMenu as="popupHandler">
  <add as="delete" action="delete" icon="images/delete.gif" if="cell"/>
</mxDefaultPopupMenu>

To add a new item for a custom function

<mxDefaultPopupMenu as="popupHandler">
  <add as="action1"><![CDATA[
     function (editor, cell, evt)
     {
         editor.execute('action1', cell, 'myArg');
     }
  ]]></add>
</mxDefaultPopupMenu>

The above example invokes action1 with an additional third argument via the editor instance. The third argument is passed to the function that defines action1. If the add-node has no action-attribute, then only the function defined in the text content is executed, otherwise first the function and then the action defined in the action-attribute is executed. The function in the text content has 3 arguments, namely the mxEditor instance, the mxCell instance under the mouse, and the native mouse event.

Custom Conditions

To add a new condition for popupmenu items

<condition name="condition1"><![CDATA[
  function (editor, cell, evt)
  {
    return cell != null;
  }
]]></condition>

The new condition can then be used in any item as follows

<add as="action1" action="action1" icon="action1.gif" if="condition1"/>

The order in which the items and conditions appear is not significant as all connditions are evaluated before any items are created.

Parameters

editor	Enclosing mxEditor instance.
menu	mxPopupMenu that is used for adding items and separators.
cell	Optional mxCell which is under the mousepointer.
evt	Optional mouse event which triggered the menu.

addItems

mxDefaultPopupMenu.prototype.addItems = function( editor,
menu,
cell,
evt,
conditions,
item,
parent )

Recursively adds the given items and all of its children into the given menu.

Parameters

editor	Enclosing mxEditor instance.
menu	mxPopupMenu that is used for adding items and separators.
cell	Optional mxCell which is under the mousepointer.
evt	Optional mouse event which triggered the menu.
conditions	Array of names boolean conditions.
item	XML node that represents the current menu item.
parent	DOM node that represents the parent menu item.

addAction

mxDefaultPopupMenu.prototype.addAction = function( menu,
editor,
lab,
icon,
funct,
action,
cell,
parent,
iconCls )

Helper method to bind an action to a new menu item.

Parameters

menu	mxPopupMenu that is used for adding items and separators.
editor	Enclosing mxEditor instance.
lab	String that represents the label of the menu item.
icon	Optional URL that represents the icon of the menu item.
action	Optional name of the action to execute in the given editor.
funct	Optional function to execute before the optional action. The function takes an mxEditor, the mxCell under the mouse and the mouse event that triggered the call.
cell	Optional mxCell to use as an argument for the action.
parent	DOM node that represents the parent menu item.
iconCls	Optional CSS class for the menu icon.

createConditions

mxDefaultPopupMenu.prototype.createConditions = function( editor,
cell,
evt )

Evaluates the default conditions for the given context.