Adobe Extending Dreamweaver CS4 Manuale Utente Scaricare il pdf (Pagina 161)

155

EXTENDING DREAMWEAVER CS4

Menus and menu commands

function receiveArguments(){

if (arguments.length != 2) return;

var whatToDo = arguments[0];

if (whatToDo == "foo"){

doOperationX(arguments[1]);

}else if (whatToDo == "bar"){

doOperationX(arguments[1]);

}

setMenuText()

Dreamweaver calls the setMenuText() function to determine what text appears for the menu item. If you do not

define the

setMenuText() function, Dreamweaver uses the text that you specified in the name attribute of the

menuitem tag.

The setMenuText() function checks the value of the argument that Dreamweaver passes, arguments[0]. If the value

of the argument is

"undo", Dreamweaver calls the dw.getUndoText() function; if it is "redo", Dreamweaver calls

dw.getRedoText(). The dw.getUndoText() function returns text that specifies the operation that Dreamweaver will

undo. For example, if the user executes multiple Redo operations,

dw.getUndoText() could return the menu text

“Undo Edit Source.” Likewise, the

dw.getRedoText() function returns text that specifies the operation that

Dreamweaver will redo. If the user executes multiple Undo operations, the

dw.RedoText() function could return the

menu text “Redo Edit Source.”

The setMenuText() function looks like the following example code:

function setMenuText()

{

if (arguments.length != 1) return "";

var whatToDo = arguments[0];

if (whatToDo == "undo")

return dw.getUndoText();

else if (whatToDo == "redo")

return dw.getRedoText();

else return "";

}

Placing the command file in the Menu folder

To implement the menu Undo and Redo menu items, you must save the MyMenu.htm command file in the

Dreamweaver Configuration/Menus folder or a subfolder that you create. The location of the file must agree with the

location that you specified in the

menuitem tag. To make it accessible to Dreamweaver, either restart Dreamweaver or

reload extensions. For information on how to reload extensions, see

“Reloading extensions” on page 78.

To run the menu commands, select the menu item when it is enabled. Dreamweaver will invoke the functions in the

command file, as described in

“How menu commands work” on page 152.

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