Created
October 22, 2010 17:40
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Gtk2hs font viewer
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import Char | |
import Control.Applicative | |
import Control.Monad | |
import Data.IORef | |
import Data.Ord | |
import Graphics.UI.Gtk | |
import qualified Graphics.UI.Gtk.ModelView as L | |
import Graphics.UI.Gtk.TreeList.TreeIter | |
import List | |
import Maybe | |
defaultSize :: Double | |
defaultSize = 24 | |
compareFaces :: FontFace -> FontFace -> Ordering | |
compareFaces x y = case (show x,show y) of | |
("Regular",_) -> LT | |
("Book",_) -> LT | |
("Roman",_) -> LT | |
(_,"Regular") -> GT | |
(_,"Book") -> GT | |
(_,"Roman") -> GT | |
(x',y') -> compare x' y' | |
treeIterIndex :: TreeIter -> Int | |
treeIterIndex (TreeIter _ i _ _) = fromEnum i | |
getSelectedIndex :: TreeView -> IO (Maybe Int) | |
getSelectedIndex view = do | |
iter <- treeViewGetSelection view >>= treeSelectionGetSelected | |
return $ treeIterIndex <$> iter | |
lower :: String -> String | |
lower = map toLower | |
scrollWidget :: (WidgetClass w) => w -> IO ScrolledWindow | |
scrollWidget w = do | |
sw <- scrolledWindowNew Nothing Nothing | |
set sw [scrolledWindowHscrollbarPolicy := PolicyAutomatic, | |
scrolledWindowVscrollbarPolicy := PolicyAutomatic, | |
scrolledWindowShadowType := ShadowIn] | |
containerAdd sw w | |
return sw | |
singleColumnTreeView :: L.ListStore a -> IO (TreeView,TreeViewColumn,CellRendererText) | |
singleColumnTreeView model = do | |
view <- treeViewNew | |
set view [treeViewModel := model, treeViewHeadersVisible := False] | |
set view [treeViewFixedHeightMode := True] | |
treeViewSetSearchColumn view 0 | |
selection <- treeViewGetSelection view | |
set selection [treeSelectionMode := SelectionBrowse] | |
column <- treeViewColumnNew | |
cell <- cellRendererTextNew | |
set column [treeViewColumnSizing := TreeViewColumnFixed, | |
treeViewColumnFixedWidth := 300] | |
set cell [L.cellTextEllipsize := EllipsizeMiddle, | |
L.cellTextScale := 1.5] | |
treeViewColumnPackStart column cell True | |
treeViewAppendColumn view column | |
return (view,column,cell) | |
fontList :: IO (L.ListStore FontFamily,TreeView) | |
fontList = do | |
model <- L.listStoreNew [] | |
(view,column,cell) <- singleColumnTreeView model | |
pango <- widgetCreatePangoContext view | |
families <- sortBy (comparing $ lower . show) <$> contextListFamilies pango | |
mapM_ (L.listStoreAppend model) families | |
treeViewSetSearchEqualFunc view $ \col txt iter -> do | |
family <- L.listStoreGetValue model $ treeIterIndex iter | |
return $ lower txt `isPrefixOf` lower (show family) | |
L.cellLayoutSetAttributes column cell model $ | |
\family -> [L.cellText := show family, L.cellTextFamily := show family] | |
return (model,view) | |
faceList :: IO (L.ListStore FontFace,TreeView) | |
faceList = do | |
model <- L.listStoreNew [] | |
(view,column,cell) <- singleColumnTreeView model | |
treeViewSetSearchEqualFunc view $ \col txt iter -> do | |
family <- L.listStoreGetValue model $ treeIterIndex iter | |
return $ lower txt `isPrefixOf` lower (show family) | |
L.cellLayoutSetAttributes column cell model $ | |
\style -> [L.cellText := show style, | |
L.cellTextFontDesc :=> pangoFontFaceDescribe style] | |
return (model,view) | |
previewNew :: IO TextView | |
previewNew = do | |
view <- textViewNew | |
buffer <- textViewGetBuffer view | |
textBufferSetText buffer $ unlines ["AaBbCcDdEeFfG","gHhIiJjKkLlMm","NnOoPpQqRrSsT","tUuVvWwXxYyZz","0123456789","hamburgefontsiv","Pack my box with five dozen liquor jugs.","Cwm fjord bank glyphs vext quiz.","The quick brown fox jumps over the lazy dog."] | |
textViewSetWrapMode view WrapWord | |
textViewSetAcceptsTab view False | |
return view | |
mainWindow :: IO Window | |
mainWindow = do | |
w <- windowNew | |
set w [windowTitle := "Font Viewer"] | |
(model1,view1) <- fontList | |
scroll1 <- scrollWidget view1 | |
set scroll1 [scrolledWindowHscrollbarPolicy := PolicyNever] | |
(model2,view2) <- faceList | |
scroll2 <- scrollWidget view2 | |
set scroll2 [scrolledWindowHscrollbarPolicy := PolicyNever] | |
preview <- previewNew | |
scroll3 <- scrollWidget preview | |
selection1 <- treeViewGetSelection view1 | |
selection2 <- treeViewGetSelection view2 | |
sizeRef <- newIORef defaultSize | |
slider <- vScaleNewWithRange 0 100 1 | |
set slider [scaleValuePos := PosLeft, rangeInverted := True, rangeValue := defaultSize] | |
let updatePreview = do | |
iter <- getSelectedIndex view2 | |
when (isJust iter) $ do | |
face <- L.listStoreGetValue model2 $ fromJust iter | |
desc <- pangoFontFaceDescribe face | |
size <- readIORef sizeRef | |
fontDescriptionSetSize desc size | |
widgetModifyFont preview (Just desc) | |
onRangeValueChanged slider $ do | |
get slider rangeValue >>= writeIORef sizeRef | |
updatePreview | |
onSelectionChanged selection1 $ do | |
iter <- getSelectedIndex view1 | |
when (isJust iter) $ do | |
family <- L.listStoreGetValue model1 $ fromJust iter | |
faces <- pangoFontFamilyListFaces family | |
L.listStoreClear model2 | |
mapM_ (L.listStoreAppend model2) (sortBy compareFaces faces) | |
Just faceIter <- treeModelGetIterFirst model2 | |
treeSelectionSelectIter selection2 faceIter | |
onSelectionChanged selection2 updatePreview | |
label1 <- labelNew (Just "Family:") | |
label2 <- labelNew (Just "Style:") | |
label3 <- labelNew (Just "Size:") | |
label4 <- labelNew (Just "Preview:") | |
mapM_ (`set` [miscXalign := 0]) [label1,label2,label3,label4] | |
box1 <- vBoxNew False 6 | |
boxPackStart box1 label1 PackNatural 0 | |
boxPackStart box1 scroll1 PackGrow 0 | |
boxPackStart box1 label2 PackNatural 0 | |
boxPackStart box1 scroll2 PackGrow 0 | |
box2 <- vBoxNew False 6 | |
boxPackStart box2 label3 PackNatural 0 | |
boxPackStart box2 slider PackGrow 0 | |
box3 <- vBoxNew False 6 | |
boxPackStart box3 label4 PackNatural 0 | |
boxPackStart box3 scroll3 PackGrow 0 | |
box4 <- hBoxNew False 6 | |
boxPackStart box4 box1 PackNatural 0 | |
boxPackStart box4 box2 PackNatural 0 | |
boxPackStart box4 box3 PackGrow 0 | |
containerAdd w box4 | |
return w | |
main :: IO () | |
main = do | |
initGUI | |
w <- mainWindow | |
set w [windowDefaultWidth := 900, | |
windowDefaultHeight := 650, | |
containerBorderWidth := 12] | |
onDestroy w mainQuit | |
widgetShowAll w | |
mainGUI |
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