51 lines
2.1 KiB
Plaintext
51 lines
2.1 KiB
Plaintext
@node C_Imenu "Intuition Extension 1.1 Command: Imenu$"
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@next C_ImouseKey
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@prev C_ImenuOnOff
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IMENU$
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------
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Imenu$(menu [,item [,sub]])=s$
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s$=Imenu$(menu [,item [,sub]])
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Defines a menu, item, or subitem. Menu is the menu number; it can
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range from 1 to 31. Item, the item number, can be 1-63, and sub, the
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subitem number, can be 1-31.
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A menu is a set of options that the user can select to control the
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actions of a program. A menu can contain zero or more items -
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although a menu with zero items is not very useful! - which are drawn
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underneath the menu when it is selected; that is, when the user
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presses the right mouse button and moves the pointer over the menu
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name. Each of those items can have zero or more subitems. If a menu
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item has subitems, then when the user places the pointer over the menu
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item, the list of subitems appears to the right of the menu item.
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By checking which menu item the user has selected (see the @{"=Ichoice " link C_Ichoice}
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function), you can act appropriately; for example, when the user
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chooses the "Quit" function, your program would close down and exit.
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The first form of Imenu$ creates or removes a menu, item, or subitem,
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depending on how many of menu, item, and sub you pass to Imenu$. When
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a menu is initially created, it contains no items; a newly-created
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item contains no subitems. The menu's or item's string is set to s$.
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If s$ is empty, the appropriate menu/item (along with all subitems) is
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deleted.
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The second form of Imenu$ returns the current string for the given
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menu/item. If it does not exist, an empty string is returned.
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In either case, an out-of-range value will cause an Illegal Function
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Call error; a value of 0 is equivalent to omitting the parameter. If
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any parameter is included (and non-zero), all the parameters before it
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must also be included and non-zero. So calling Imenu$(1,0,2) will
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result in an error.
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In order for the user to be able to use the menus you have created,
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you will need to use the @{" Imenu On " link C_ImenuOnOff} instruction. Once menus are
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activated, you cannot make any changes without first deactivating them
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(with @{" Imenu Off " link C_ImenuOnOff}).
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@endnode
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