Difference between revisions of "Gtk2Hs/Tutorials/TreeView"
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Andrewufrank (talk | contribs) m |
Andrewufrank (talk | contribs) m |
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I had much trouble with creating a simple selection from a list, lacking examples on the web i could find. Therefore i post here the solution I have working - it is not optimal and I would appreciate comments. |
I had much trouble with creating a simple selection from a list, lacking examples on the web i could find. Therefore i post here the solution I have working - it is not optimal and I would appreciate comments. |
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I shows a simple list with four names and after clicking on one it says which one you selected. i hope it is useful for others! |
I shows a simple list with four names and after clicking on one it says which one you selected. i hope it is useful for others! |
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module Main where |
module Main where |
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and it is very difficult to find which ones are |
and it is very difficult to find which ones are |
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really needed for simple tasks |
really needed for simple tasks |
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| − | -} |
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import Graphics.UI.Gtk |
import Graphics.UI.Gtk |
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import Graphics.UI.Gtk.ModelView as Model |
import Graphics.UI.Gtk.ModelView as Model |
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main :: IO () |
main :: IO () |
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oneSelection :: ListStore String -> Model.TreeSelection -> IO () |
oneSelection :: ListStore String -> Model.TreeSelection -> IO () |
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oneSelection list tree = do |
oneSelection list tree = do |
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sel <- Model.treeSelectionGetSelectedRows tree |
sel <- Model.treeSelectionGetSelectedRows tree |
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Revision as of 09:24, 1 September 2009
I had much trouble with creating a simple selection from a list, lacking examples on the web i could find. Therefore i post here the solution I have working - it is not optimal and I would appreciate comments. I shows a simple list with four names and after clicking on one it says which one you selected. i hope it is useful for others!
module Main where
{- an example how to select from a list
not satisfactory yet:
- there should be a simpler way to render a simple list
- i could not convert the model i got back to a list
from which to get the value
- the interface offers a great number of functions
and it is very difficult to find which ones are
really needed for simple tasks
-}
import Graphics.UI.Gtk import Graphics.UI.Gtk.ModelView as Model
main :: IO () main = do initGUI -- is start window <- windowNew
list <- listStoreNew ["Vince", "Jhen", "Chris", "Sharon"]
treeview <- Model.treeViewNewWithModel list Model.treeViewSetHeadersVisible treeview True
-- there should be a simpler way to render a list as the following!
col <- Model.treeViewColumnNew
Model.treeViewColumnSetTitle col "colTitle"
renderer <- Model.cellRendererTextNew
Model.cellLayoutPackStart col renderer False
Model.cellLayoutSetAttributes col renderer list
$ \ind -> [Model.cellText := ind]
Model.treeViewAppendColumn treeview col
tree <- Model.treeViewGetSelection treeview Model.treeSelectionSetMode tree SelectionSingle Model.onSelectionChanged tree (oneSelection list tree)
set window [ windowDefaultWidth := 100
, windowDefaultHeight := 200
, containerChild := treeview
]
onDestroy window mainQuit
widgetShowAll window
mainGUI
return ()
oneSelection :: ListStore String -> Model.TreeSelection -> IO () oneSelection list tree = do sel <- Model.treeSelectionGetSelectedRows tree let s = head (head sel) v <- Model.listStoreGetValue list s putStrLn $ "selected " ++ v