[Pharo-users] How to programatically select an item in a Spec TreeModel ?

Peter Uhnák i.uhnak at gmail.com
Fri Oct 23 15:01:51 EDT 2015


It's also possible that it is simply bugged.

PackageRemotesManager doesn't use TreeModel, it uses different widget
(whose API looks cleaner).

I'll try to look at this tomorrow (unless someone else beats me to it) how
this could be done (and maybe even take a stab at cleaning the API a
bit...).

Peter

On Fri, Oct 23, 2015 at 5:17 PM, Edouard KLEIN <edouardklein at gmail.com>
wrote:

> Hi !
>
> I've been playing with Pharo again. In the application I'm building, I
> need to load a file from disk, and depending on what is inside this
> file, select an item in a tree that is displayed on the main window.
>
> The SearchableTree subclass I use is copied at the end of the email. It
> is nothing fancy, just creating the nodes from a fixed tree structure.
>
> The method selectedItemFRomPathArray (e.g. #('a' 'a1')) is the one that
> should be responsible for selecting the node, but for now it just
> returns the array of TreeNodeModel that correspond to the strings in the
> 'PathArray' given in argument.
>
> I tried the following in a PlayGround :
>
> w := CRPJCategories2 new. w openWithSpec.
> "Taken from packageRemotesManager without understanding it."
> w tree selectedItem:(
>         (w roots) first  "This line can also be :
>         ((w selectedItemFromPathArray:#('a')) last)"
>         selected:true;
>         takeHighlight;
>         yourself).
>
> Which works, but when I try to select something that is not a root node,
> then it does not work, and I've been pulling my hair trying to
> understand why.
>
> w := CRPJCategories2 new. w openWithSpec.
> "Taken from packageRemotesManager without understanding it."
> w tree selectedItem:(
> ((w selectedItemFromPathArray:#('a' 'a1')) last) "<- DOES NOT WORK"
> selected:true;
> takeHighlight;
> yourself).
>
>
> Any pointer would be very much appreciated.
>
> Thenks in advance.
>
> Edouard.
>
>
>
>
> -------------------------------------------------------
> 'From Pharo4.0 of 18 March 2013 [Latest update: #40623] on 23 October
> 2015 at 4:55:07.823126 pm'!
> SearchableTree subclass: #CRPJCategories2
>         instanceVariableNames: 'structure'
>         classVariableNames: ''
>         poolDictionaries: ''
>         category: 'CRPJ'!
>
> !CRPJCategories2 methodsFor: 'as yet unclassified' stamp: 'EdouardKlein
> 10/23/2015 15:29'!
> nodeFromTreeStructure: anArray
>         ^ (anArray collect:[:x| TreeNodeModel new
>                 content: (x at:1);
>                 children: [((x size = 1) ifTrue:[#()] ifFalse:[self
> nodeFromTreeStructure:(x at:2)])];
>                 hasChildren:[x size > 1]]) asOrderedCollection.! !
>
> !CRPJCategories2 methodsFor: 'as yet unclassified' stamp: 'EdouardKlein
> 10/23/2015 15:10'!
> initialize
>         |  |
>         super initialize.
>         structure := {
>                 {'a' . {
>                         {'a1'}.
>                         {'a2'}}}.
>                 {'b' . {
>                         {'b1' . {
>                                 {'b1A'}.
>                                 {'b1B'}}}.
>                         {'b2'}.
>                         {'b3' . {
>                                 {'b3A'}.
>                                 {'b3B'}}}}}.
>                 {'c' . {
>                         {'c1'}.
>                         {'c2'}.
>                         {'c3'}}}}.
>         self roots:(self nodeFromTreeStructure: structure).! !
>
> !CRPJCategories2 methodsFor: 'as yet unclassified' stamp: 'EdouardKlein
> 10/23/2015 16:54'!
> selectedItemFromPathArray:aPathArray
>         "a string description of the currently selected item"
>         | recurse |
>         recurse := [:path :nodes|
>                 |nextNode|
>                 nextNode := (nodes select:[:n| n content = path first])
> first.
>                 (path size = 1) ifTrue:[{nextNode}] ifFalse:[
>                         {nextNode},(recurse value:(path
> allButFirst)value:(nextNode children
> value))]].
>         ^(recurse value: aPathArray value:(self roots)).! !
>
> !CRPJCategories2 methodsFor: 'as yet unclassified' stamp: 'EdouardKlein
> 10/23/2015 16:53'!
> selectedItemAsPathArray
>         "an array of the path to the currently selected item"
>         | recurse |
>         recurse := [:node| node ifNil:[{}]
>                                 ifNotNil:[(recurse value:(node
> parentNode)),{node}]].
>         ^(recurse value:self selectedItem) collect:[:node| node content].!
> !
>
>
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