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MouseDemo: add an editor and use mouse events to move the cursor

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This commit is contained in:
Jonathan Daugherty 2016-12-03 20:26:19 -08:00
parent 1d44dad7f5
commit 104d762dd4
2 changed files with 25 additions and 10 deletions
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3
brick.cabal
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@ -164,7 +164,8 @@ executable brick-mouse-demo
data-default,
text,
microlens >= 0.3.0.0,
microlens-th
microlens-th,
text-zipper
executable brick-layer-demo
if !flag(demos)

32
programs/MouseDemo.hs
View File

@ -3,7 +3,7 @@
module Main where
import Control.Applicative ((<$>))
import Lens.Micro ((^.), (&), (.~))
import Lens.Micro ((^.), (&), (.~), (%~))
import Lens.Micro.TH (makeLenses)
import Control.Monad (void)
import Data.Monoid ((<>))
@ -12,19 +12,23 @@ import qualified Graphics.Vty as V
import qualified Brick.Types as T
import Brick.AttrMap
import Brick.Util
import Brick.Types (Widget, ViewportType(Vertical))
import Brick.Types (Widget, ViewportType(Both))
import qualified Brick.Main as M
import qualified Brick.Widgets.Edit as E
import qualified Brick.Widgets.Center as C
import qualified Brick.Widgets.Border as B
import Brick.Widgets.Core
import Data.Text.Zipper (moveCursor)
import Data.Tuple (swap)
data Name = Info | Button1 | Button2 | Button3 | Prose
data Name = Info | Button1 | Button2 | Button3 | Prose | TextBox
deriving (Show, Ord, Eq)
data St =
St { _clicked :: [T.Extent Name]
, _lastReportedClick :: Maybe (Name, T.Location)
, _prose :: String
, _edit :: E.Editor String Name
}
makeLenses ''St
@ -38,7 +42,11 @@ drawUi st =
buttonLayer :: St -> Widget Name
buttonLayer st =
C.centerLayer $ hBox $ padAll 1 <$> buttons
C.vCenterLayer $
C.hCenterLayer (padBottom (T.Pad 1) $ str "Click a button:") <=>
C.hCenterLayer (hBox $ padLeftRight 1 <$> buttons) <=>
C.hCenterLayer (padTopBottom 1 $ str "Or enter text and then click in this editor:") <=>
C.hCenterLayer (vLimit 3 $ hLimit 50 $ E.renderEditor True (st^.edit))
where
buttons = mkButton <$> buttonData
buttonData = [ (Button1, "Button 1", "button1")
@ -78,12 +86,16 @@ infoLayer st = T.Widget T.Fixed T.Fixed $ do
C.hCenter (str ("Last reported click: " <> msg))
appEvent :: St -> T.BrickEvent Name e -> T.EventM Name (T.Next St)
appEvent st (T.MouseDown n _ _ loc) = M.continue $ st & lastReportedClick .~ Just (n, loc)
appEvent st (T.MouseDown n _ _ loc) = do
let T.Location pos = loc
M.continue $ st & lastReportedClick .~ Just (n, loc)
& edit %~ E.applyEdit (if n == TextBox then moveCursor (swap pos) else id)
appEvent st (T.MouseUp _ _ _) = M.continue $ st & lastReportedClick .~ Nothing
appEvent st (T.VtyEvent (V.EvMouseUp _ _ _)) = M.continue $ st & lastReportedClick .~ Nothing
appEvent st (T.VtyEvent (V.EvKey V.KUp [])) = M.vScrollBy (M.viewportScroll Prose) (-1) >> M.continue st
appEvent st (T.VtyEvent (V.EvKey V.KDown [])) = M.vScrollBy (M.viewportScroll Prose) 1 >> M.continue st
appEvent st (T.VtyEvent (V.EvKey V.KUp [V.MCtrl])) = M.vScrollBy (M.viewportScroll Prose) (-1) >> M.continue st
appEvent st (T.VtyEvent (V.EvKey V.KDown [V.MCtrl])) = M.vScrollBy (M.viewportScroll Prose) 1 >> M.continue st
appEvent st (T.VtyEvent (V.EvKey V.KEsc [])) = M.halt st
appEvent st (T.VtyEvent ev) = M.continue =<< T.handleEventLensed st edit E.handleEditorEvent ev
appEvent st _ = M.continue st
aMap :: AttrMap
@ -92,6 +104,7 @@ aMap = attrMap V.defAttr
, ("button1", V.white `on` V.cyan)
, ("button2", V.white `on` V.green)
, ("button3", V.white `on` V.blue)
, (E.editFocusedAttr, V.black `on` V.yellow)
]
app :: M.App St e Name
@ -100,7 +113,7 @@ app =
, M.appStartEvent = return
, M.appHandleEvent = appEvent
, M.appAttrMap = const aMap
, M.appChooseCursor = M.neverShowCursor
, M.appChooseCursor = M.showFirstCursor
}
main :: IO ()
@ -111,7 +124,7 @@ main = do
return v
void $ M.customMain buildVty Nothing app $ St [] Nothing
$ "Press up and down arrow keys to scroll, ESC to quit.\n\
"Press Ctrl-up and Ctrl-down arrow keys to scroll, ESC to quit.\n\
\Observe the click coordinates identify the\n\
\underlying widget coordinates.\n\
\\n\
@ -130,3 +143,4 @@ main = do
\Excepteur sint occaecat cupidatat not proident,\n\
\sunt in culpa qui officia deserunt mollit\n\
\anim id est laborum.\n"
(E.editor TextBox (str . unlines) Nothing "")