Hi, The important visual objects, such as the selection, are reflected on the ports of the pane containing the presentation.
The tree has two ports that are relevant for selection: - #selection will give you the selected node - #selectionPath will give you the path from the selected node to the root You can do like this: a tree act: [:treePresentation | treePresentation selection inspect ] entitled: 'Inspect selection'; act: [:treePresentation | treePresentation selectionPath inspect ] entitled: 'Inspect selection path' Cheers, Doru On Thu, Aug 14, 2014 at 1:32 AM, Nicolai Hess <nicolaih...@web.de> wrote: > Hi Offray, > > some notes about your code: > > > browser > act: [:newNode | > newNode := UbakyeNode > header: 'nuevoNodo' body: > ''. > mainTree addNode: newNode.] > > this would change the block parameter "newNode", but the block parameter > is supposed to deliver the object you'll act on, the browser for example. > I think you wanted to write this code: > > browser > act: [ :b | |newNode| > > newNode := UbakyeNode > header: 'nuevoNodo' body: ''. > b entity addNode: newNode . > > if you call "b update" like you did in the "remove action" your browse > tree update will work. > > changing OrderedCollection to GLMAnnouncingCollection should work, but > you'll have to define > the appropiate announcer source #children instead of #yourself. #yourself > gives the mainTree, and that > does not work as your mainTree is not a GLMAnnouncingCollection. > > updateOn: GLMItemAdded from: #children > > There are two things I don't understand > > 1. > setting updateOn: on the browser does not work: > > browser updateOn: GLMItemAdded from: #children. > > but setting it on the tree > > (browser transmit) > to: #preview; > andShow: [ :a | > a tree > "-->" updateOn: GLMItemAdded from: #children; > > title: mainTree header; > children: [:eachNode | eachNode children ]; > > format: [:eachNode | eachNode header ]. > a text > title: 'Text']. > > > updates the tree when adding an element by the + button > > 2. is there a way to get the currently selected tree node? Otherwise > all new nodes only added to the first node. > > > There are plenty of examples, but no one with add/remove or selection on > trees. > > > Nicolai > > > > > > > > > > > > > > > > > > > 2014-08-13 21:37 GMT+02:00 Offray Vladimir Luna Cárdenas < > off...@riseup.net>: > > Hi Usman, >> >> >> On 08/13/2014 02:16 AM, Usman Bhatti wrote: >> >>> Hi Offray, >>> >>> As Doru mentioned, without a complete example it is difficult to >>> reproduce and >>> analyze your problem. >>> >> >> My main issue is that I don't know how to share a complete example except >> by sharing this url: >> >> http://smalltalkhub.com/#!/~Offray/Ubakye/ >> >> and advising to upload the code and run "UbakyeBrowser open". In file >> based frameworks I can point to a specific file which contains the model >> of my defined objects, but I don't know how to share my own defined >> objects/messages in Smalltalk except by this or by manually cutting and >> pasting to email (it should be a better way). >> >> Anyway this is the part where I define a UbakyeNode: >> >> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- >> Object subclass: #UbakyeNode >> instanceVariableNames: 'header headers key icon body children >> parent node' >> classVariableNames: '' >> category: 'Ubakye-Model' >> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- >> >> and the children method is the one which uses a colection: >> >> >> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- >> UbakyeNode>>children >> "Returns the receivers list of children" >> >> ^ children ifNil: [children := OrderedCollection new] >> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- >> >> >> For the tree to get updated on node addition or removal, you need to use >>> GLMAnnouncingCollection to group your nodes. Hence, when you add a new >>> node in >>> your announcing collection object, this code comes into effect: >>> >>> updateOn: GLMItemAdded from: #yourself; >>> >>> So, make sure you are using appropriate collection object. >>> >> >> >> I tried changing OrderedCollection in the children message by >> GLMAnnouncingCollection, but the header message started to fail. Can I pass >> my children collection to a GLMAnnouncingCollection just in the interface >> or need I to change the object definition for the UbakyeNode, and if this >> is the case, how can I access the header of a UbakyeNode stored in this >> kind of collection? I know is kind of dumb to ask without proper context, >> but I hope that the SmalltalkHub repository (or other method) can be used >> to share my own defined object to make better questions. >> >> usman >>> >> >> Cheers, >> >> Offray >> >> >> >> > -- www.tudorgirba.com "Every thing has its own flow"
