B4J Tutorial [BANanoWebix] Lesson 18 GroupList

Mashiane

Expert
Licensed User
Ola

The grouplist enables one to group elements added easily. Thanks to code that @Brandsum for code to unflatten a list of map records to a tree.

Lesson18GroupList.gif


We create the grouplist, each record with a 'parentid' property and each record as a map.

B4X:
Dim gl As WixGroupList
    gl.Initialize("gl").SetScroll(True).SetWidth(300).SetBorderLess(False)
    gl.SetStyle("margin","10px")
    '
    'add items
    gl.AddItem("","movies", "Movies","","","","",True)
    gl.AddItem("movies", "startrek", "Star Trek","","","","",False)
    gl.AddItem("movies", "starwars", "Star Wars","","","","",False)
    '
    gl.AddItem("startrek", "tmp", "The Motion Picture","","","","",False)
    gl.AddItem("startrek", "twk", "The Wrath of Khan","","","","",False)
    gl.AddItem("startrek", "sfs", "The Search for Spock","","","","",False)
    '
    gl.AddItem("starwars", "tnh", "A New Hope","","","","",False)
    gl.AddItem("starwars", "tesb", "The Empire Strikes Back","","","","",False)
    gl.AddItem("starwars", "troj", "Return of the Jedi","","","","",False)
    '
    gl.AddItem("","books", "Books","","","","",True)
    gl.AddItem("books","hp", "Harry Potter","","","","",False)
    '
    gl.AddItem("hp","tss", "The Sorcerer's Stone","","","","",False)
    gl.AddItem("hp","tcos", "The Chamber of Secrets","","","","",False)
    gl.AddItem("hp","tpoa", "The Prisoner of Azkaban","","","","",False)
    '
    gl.AddItem("books","dt", "The Dark Tower","","","","",False)
    gl.AddItem("dt","tg", "The Gunslinger","","","","",False)
    gl.AddItem("dt","tdot", "The Drawing of the Three","","","","",False)
    gl.AddItem("dt","twl", "The Waste Lands","","","","",False)
    '
    Dim data As List = pg.Unflatten(gl.items)
    gl.SetData(data)
We then unflatten this structure to be a tree and use .SetData of the grouplist to add the unflattedned data and walla!
 
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