Bring the Test Runner window back if you had it minimized. FileListTest should be the only test class selected in the list. Press the "Run One" button.
Let's search for what we may be able to use. Open up a Browser. Do a "find class..." and choose a generic class name of "Menu". The following list of choices are presented:
StandardFileMenu looks like a reasonable place to start.
Looking at the class methods, the method #oldFile might work for us. Let's see what it does by trying it in a Workspace. Type this code in a Workspace:
If you select the whole line and then perform a Command-I (Inspect) you will see both what it does and what it answers by way of an inspector on the result. It looks like you can choose subdirectories and parent directories using this menu.
It's not quite what we need but it's pretty close. Let's go look at the class some more. When I clicked on the "hierarchy" button in the browser I could see that the immediate superclass is SelectionMenu. If you click on that class in the hierarchy browser, and the press the "hierarchy" button again you will get a hierarchy browser on the SelectionMenu class and all it's subclasses.
Let's create a new subclass to handle directory only queries. I created the following class definition in the browser:
Following a pattern similar to the StandardFileMenu class method #oldFile, I created the following class methods on StandardDirectoryMenu:
StandardFileMenu subclass: #StandardDirectoryMenu
^ self choosePathFrom: FileDirectory default
^ (self choosePathMenu: aDirectory)
startUpWithCaption: 'Select a Directory'
ifFalse: [^ nil].
^ self new choosePathFrom: aDirectory
The #startUpWithCaption: method presents an interesting problem. We need to "get around" the method in the super class. So a new instance method was created on the class StandardFileMenu...
canTypeFileName := false.
^ self makeDirectoryMenuFor: aDirectory
^ self makeFileMenuFor: aDirectory
"Answer a menu labels object corresponding to aDirectory"
streamContents: [:s |
s nextPutAll: (self pathPartsString: aDirectory).
s nextPutAll: (self directoryNamesString: aDirectory).
s nextPutAll: (self fileNamesString: aDirectory).
s skip: -1]
"Answer a menu selections object corresponding to aDirectory. The object
is an array corresponding to each item, each element itself constituting
a two-element array, the first element of which contains a selector to
operate on and the second element of which contains the parameters
for that selector."
| dirSize |
dirSize := aDirectory pathParts size.
streamContents: [:s |
s nextPut: (StandardFileMenuResult directory: FileDirectory root name: '').
doWithIndex: [:d :i | s
directory: (self advance: dirSize - i containingDirectoriesFrom: aDirectory)
do: [:dn | s
on: (aDirectory fullNameFor: dn))
s nextPut: (StandardFileMenuResult directory: aDirectory name: nil)]
startUpWithCaption: aString at: location
| result |
result := super superStartUpWithCaption: aString at: location.
result ifNil: [^ nil].
ifTrue: [self makeDirectoryMenuFor: result directory.
^ self startUpWithCaption: aString at: location].
superStartUpWithCaption: aString at: location
^ super startUpWithCaption: aString at: location
Go back to the Workspace window and let's test the new menu. Type this code in the Workspace, select it and then perform a Command-I (Inspect) execute and inspect the result:
From the opened inspector on your result, choose "browse class" from the inspector's menu to allow us to browse the class of the result while looking at it's contents.
From the browser we see there is a #directory method available. To test it out, perform a "self directory" and examine the results to see what this object returns. This is what I see:
That's the path to the directory I selected. We can use this method in our FileList class.
UnixFileDirectory on '/home/steve/dev/squeak/myWork/evaluating'
Here is the instance method we can use in FileList.
We need to include our new item in the menu. Here's the code pieces that were modified to include references to our new #copySelectedFileToNewLocation method.
| result |
listIndex = 0
ifTrue: [^ self].
(result := StandardDirectoryMenu choosePath)
ifNotNil: [self copySelectedFileToDirectory: result directory]
Open up a File List and test this feature manually.
Continue on to the next page of second FileList enhancement.
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