Maplets[Elements]

Parameters

 opts - equation(s) of the form option=value where option is one of caption, enabled, image, onclick, reference, or visible; specify options for the MenuItem element refID - name or string; reference to the element

Description

 • The MenuItem element features can be modified by using options. To simplify specifying options in the Maplets package, certain options and contents can be set without using an equation. The following table lists elements, symbols, and types (in the left column) and the corresponding option or content (in the right column) to which inputs of this type are, by default, assigned.

 Elements, Symbols, or Types Assumed Option or Content Action or command elements onclick option Image element image option refID reference option string or symbol caption option

 • A MenuItem element can contain Action or command elements to specify the onclick option and an Image element to specify the image option.
 • The following table describes the control and use of the MenuItem element options.
 An x in the I column indicates that the option can be initialized, that is, specified in the calling sequence (element definition).
 An x in the R column indicates that the option is required in the calling sequence.
 An x in the G column indicates that the option can be read, that is, retrieved by using the Get tool.
 An x in the S column indicates that the option can be written, that is, set by using the SetOption element or the Set tool.

 Option I R G S caption x x x x enabled x x x image x onclick x x reference x visible x x x

 • The opts argument can contain one or more of the following equations that set Maplet application options.
 caption = string or symbol
 The caption that appears on the menu item.  The caption can have a mnemonic key or access key associated with it.  For more information, see Maplets Mnemonic Key.
 enabled = true or false
 Whether a menu item can be selected.  If enabled is set to false, the menu item is dimmed, and any action associated with it cannot be initiated.  By default, the value is true.
 image = reference
 A reference to an Image element.
 onclick = Action or command element, or reference to an Action element (name or string)
 The action that occurs when the menu item is selected.
 reference = name or string
 A reference to the MenuItem element.
 If the reference is specified by both an index, for example, MenuItem[refID], and a reference in the calling sequence, the index reference takes precedence.
 visible = true or false
 Whether the menu item is visible to the user.  By default, the value is true.

Examples

 > $\mathrm{with}\left(\mathrm{Maplets}\left[\mathrm{Elements}\right]\right):$
 > $\mathrm{maplet}≔\mathrm{Maplet}\left(\mathrm{Window}\left('\mathrm{menubar}'='\mathrm{MB1}',\left[\left[\mathrm{Button}\left("OK",\mathrm{Shutdown}\left("Closed from button"\right)\right)\right]\right]\right),\mathrm{MenuBar}\left['\mathrm{MB1}'\right]\left(\mathrm{Menu}\left("File",\mathrm{MenuItem}\left("Close",\mathrm{Shutdown}\left("Closed from menu"\right)\right)\right)\right)\right):$
 > $\mathrm{Maplets}\left[\mathrm{Display}\right]\left(\mathrm{maplet}\right)$