2015-12-23 16:50 GMT+01:00 Offray Vladimir Luna Cárdenas <off...@riseup.net> :
> Thanks Nicolai for your minimalist example. Only until now I have time to > test it (sorry), but I get some "MessageNotUnderstood: > SpecTreeNodeModel>>layoutFrame:" when I run this: > > ================= > | aClass subItems | > aClass := RTObject. > subItems := RTObject subclasses. > "create the node" > t := TreeNodeModel new > content: aClass name; > hasChildren: [ aClass subclasses notEmpty ]; > children: [ subItems ifNil:[subItems:=aClass subclasses collect: [ > :s | self buildNodeFor: s ] ]]; > yourself. > "listen on selection" > t whenSelectedChanged: [ :bool | bool ifTrue:[self field text: t content] > ]. > t openWithSpec > ================= > The children block codee only works as part of the class I defined with the method buildNodeFor: ( it calls "self buildNodeFor:") > > There is any way to run a minimal GUI with a tree using your example? I'm > still missing a key concept on how to use spec and binding between widgets. > what is missing ? this is a minimal gui with a tree component. > > Thanks, > > Offray > > > On 29/11/15 13:51, Nicolai Hess wrote: > > > > 2015-11-26 19:36 GMT+01:00 Offray Vladimir Luna Cárdenas < > <off...@riseup.net>off...@riseup.net>: > >> Hi, >> >> I had tried that before and didn't work. Passing information between >> widgets and back in this spec interface seems my stop point now... If >> someone could help me with some kind of minimalist example that uses >> treeModel, that would be greatly appreciated. >> > > Find attached a minimal example. (I use Morph and its subclasses for > generating some tree data, these are just names, renaming a node does not > rename the class :)) > > You can listen on tree node selection by registering with > #whenSelectedChanged, on the TreeNode(!) > > "create the node" > t := TreeNodeModel new > content: aClass name; > hasChildren: [ aClass subclasses notEmpty ]; > children: [ subItems ifNil:[subItems:=aClass subclasses collect: [ > :s | self buildNodeFor: s ] ]]; > yourself. > > "listen on selection" > t whenSelectedChanged: [ :bool | bool ifTrue:[self field text: t content] > ]. > > this will change the text field content with the content of the node (the > default label). > > Changing the label node *Morph* on accepting the text field text is > somehow impossible or difficult. > I would have expected that Spec would create a MorphicTreeNodeAdapter that > represents some Morph, for which the adapter would update/change the state, > if you change > the TreeNodeModel content. > Instead, it creates some strange SpecTreeNodeModel. And the only way to > update the NodeLabel and make this change visible is to > rebuild the whole tree: > > tree roots: tree roots. > > Yes, I did not find another way. > > Luckily MorphTreeMorph is smart enough to remember the selection and path > expansion state, so this works quite well. > > > >> >> Cheers, >> >> Offray >> >> >> On 26/11/15 12:47, webwarrior wrote: >> >>> Try #whenHighlightedItemChanged: method. >>> >>> I remember that distinction between selection/highlight is not very >>> clear in >>> TreeModel. >>> >>> >>> >>> -- >>> View this message in context: >>> <http://forum.world.st/Spec-Binding-widgets-how-to-tp4863742p4863757.html> >>> http://forum.world.st/Spec-Binding-widgets-how-to-tp4863742p4863757.html >>> Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. >>> >>> >>> >> >> > >
