Adobe 38040334 Extending Dreamweaver - Page 163

The menu commands API functions

Page 163 highlights

DREAMWEAVER CS3 157 Extending Dreamweaver After variables are initialized, the receiveArguments() function calls the user-defined function havePreviewTarget() and tests the result. If the result of the test is true, the function checks to see if the user selected the primary or secondary browser. If so, the function sets the variable theBrowser to the path of the executable file that starts the browser (dw.getPrimaryBrowser() or dw.getSecondaryBrowser()). The function then performs a loop that examines the list of browsers returned by dw.getBrowsersList(). If the path to a browser in the list matches the path to the primary or secondary browser, the function sets the variable theBrowser to the matching value in browserList. This value contains the name of the browser and the path to the executable file that starts the browser. If havePreviewTarget() returns the value false, the function sets the variable theBrowser to the value of the variable whichBrowser. Next, the receiveArguments() function tests the variable theBrowser to make sure that it does not begin with a path, that it is not "undefined", and that it has a length greater than 0. If all these conditions are true, and if the Site panel has focus, the receiveArguments() function calls the site.browseDocument() function to invoke the selected browser with the files selected in the Site panel. If the Site panel does not have focus, the receiveArguments() function calls the function dw.browseDocument() and passes it the path of the current document and the value of the variable theBrowser, which specifies the name of the browser with which to open the document. If the user pressed the shortcut keys (F12 or Ctrl+F12) and no primary or secondary browser has been specified, a dialog box appears to inform the user. If the user clicks OK, the function calls the function dw.showPreferencesDialog() with the browsers argument to let the user specify a browser at that point. The menu commands API functions The custom functions in the menu commands API are not required. canAcceptCommand() Description Determines whether the menu item is active or dimmed. Arguments {arg1}, {arg2},...{argN}} If it is a dynamic menu item, the unique ID that the getDynamicContents() function specifies is the only argument. Otherwise, if the arguments attribute is defined for a menuitem tag, the value of that attribute passes to the canAcceptCommand() function (and to the "isCommandChecked()" on page 159, "receiveArguments()" on page 159, and "setMenuText()" on page 160 functions) as one or more arguments. The arguments attribute is useful for distinguishing between two menu items that call the same menu command. Note: The arguments attribute is ignored for dynamic menu items. Returns Dreamweaver expects a Boolean value: true if the item should be enabled; false otherwise.

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DREAMWEAVER CS3
Extending Dreamweaver
157
After variables are initialized, the
receiveArguments()
function calls the user-defined function
havePre-
viewTarget()
and tests the result. If the result of the test is true, the function checks to see if the user selected the
primary or secondary browser. If so, the function sets the variable
theBrowser
to the path of the executable file that
starts the browser (
dw.getPrimaryBrowser()
or
dw.getSecondaryBrowser()
). The function then performs a
loop that examines the list of browsers returned by
dw.getBrowsersList()
. If the path to a browser in the list
matches the path to the primary or secondary browser, the function sets the variable
theBrowser
to the matching
value in
browserList
. This value contains the name of the browser and the path to the executable file that starts the
browser. If
havePreviewTarget()
returns the value
false
, the function sets the variable
theBrowser
to the value
of the variable
whichBrowser
.
Next, the
receiveArguments()
function tests the variable
theBrowser
to make sure that it does not begin with a
path, that it is not
"undefined"
, and that it has a length greater than 0. If all these conditions are true, and if the Site
panel has focus, the
receiveArguments()
function calls the
site.browseDocument()
function to invoke the
selected browser with the files selected in the Site panel. If the Site panel does not have focus, the
receiveArgu-
ments()
function calls the function
dw.browseDocument()
and passes it the path of the current document and the
value of the variable
theBrowser
, which specifies the name of the browser with which to open the document.
If the user pressed the shortcut keys (F12 or Ctrl+F12) and no primary or secondary browser has been specified, a
dialog box appears to inform the user. If the user clicks OK, the function calls the function
dw.showPreferences-
Dialog()
with the
browsers
argument to let the user specify a browser at that point.
The menu commands API functions
The custom functions in the menu commands API are not required.
canAcceptCommand()
Description
Determines whether the menu item is active or dimmed.
Arguments
{arg1}, {arg2},...{argN}}
If it is a dynamic menu item, the unique ID that the
getDynamicContents()
function specifies is the only
argument. Otherwise, if the
arguments
attribute is defined for a
menuitem
tag, the value of that attribute passes to
the
canAcceptCommand()
function (and to the “isCommandChecked()” on page 159, “receiveArguments()” on
page 159, and “setMenuText()” on page 160 functions) as one or more arguments. The
arguments
attribute is useful
for distinguishing between two menu items that call the same menu command.
Note:
The
arguments
attribute is ignored for dynamic menu items.
Returns
Dreamweaver expects a Boolean value:
true
if the item should be enabled;
false
otherwise.