我已经彻底搜索了(至少我相信是这样),但我没有找到任何解决我的问题的答案,所以我想向您寻求帮助。
我试图确定用户何时右键单击我的 treeView(用户列表)中的一行,然后显示一个带有编辑和删除选项的弹出窗口。
Here's到目前为止我的应用程序看起来如何
这是生成 TreeView 的代码:
import Graphics.UI.Gtk
import System.Glib.Signals (on)
import Graphics.UI.Gtk.Glade
import Graphics.UI.Gtk.ModelView as New
import SzuDB
data GUI = GUI {
mainWindow :: Window,
--Buttony
dodajUczBt :: Button,
cancelAddUczBt :: Button,
zapiszUczBtn :: Button,
--TreeView
listaUczView :: TreeView,
-- Dialogi
dodajUzDialog :: Dialog,
-- Entry
nImie :: Entry,
nNazwisko :: Entry,
nWiek :: SpinButton,
lblLiczbaUcz :: Label
}
-- Różne listy
data ListStores = ListStores { uczestnicy :: ListStore Uczestnik }
main = do
initGUI
dbh <- connect "szu.db"
gui <- loadGlade "szu.glade" dbh
-- lapiemy uzytkownikow
uczestnicy <- getAllUsers dbh
labelSetText (lblLiczbaUcz gui) $ "Liczba uczestników: "++ show (length uczestnicy)
listaUczestnikow <- New.listStoreNew uczestnicy
New.treeViewSetModel (listaUczView gui) listaUczestnikow
wyswietlUczestnikow (listaUczView gui) listaUczestnikow
let liststore = ListStores $ listaUczestnikow
loadGUIEvents gui dbh liststore
widgetShowAll (mainWindow gui)
mainGUI
-- loadGlade etc.
wyswietlUczestnikow view uczestnik = do
New.treeViewSetHeadersVisible view True
-- add a couple columns
renderer1 <- New.cellRendererTextNew
col1 <- New.treeViewColumnNew
New.treeViewColumnPackStart col1 renderer1 True
New.cellLayoutSetAttributes col1 renderer1 uczestnik $ \row -> [ New.cellText := imie row ]
New.treeViewColumnSetTitle col1 "Imię"
New.treeViewAppendColumn view col1
renderer2 <- New.cellRendererTextNew
col2 <- New.treeViewColumnNew
New.treeViewColumnPackStart col2 renderer2 True
New.cellLayoutSetAttributes col2 renderer2 uczestnik $ \row -> [ New.cellText := nazwisko row ]
New.treeViewColumnSetTitle col2 "Nazwisko"
New.treeViewAppendColumn view col2
renderer3 <- New.cellRendererTextNew
col3 <- New.treeViewColumnNew
New.treeViewColumnPackStart col3 renderer3 True
New.cellLayoutSetAttributes col3 renderer3 uczestnik $ \row -> [ New.cellText := show (wiek row) ]
New.treeViewColumnSetTitle col3 "Wiek"
New.treeViewAppendColumn view col3
--
-- ladujemy wydarzenia
--
-- loadGuiEvents etc.
我已经尝试使用 http://www.muitovar.com/gtk2hs/chap7-2.html 中的示例但它导致了编译错误(它说 eventButton 与一个参数一起使用,而它不需要)。
任何帮助将不胜感激 :)
干杯
最佳答案
好吧,看来我将成为第一个为我自己的问题找到答案的人:)
(1) 首先是http://www.muitovar.com/gtk2hs/chap7-2.html的例子对我不起作用,因为你有两个 eventButton
gtk2hs 中的函数,您必须使用 Graphics.UI.Gtk.Gdk.Events
中的函数.所以你必须在文件的开头添加:
import Graphics.UI.Gtk.Gdk.Events as Ev
然后添加
Ev.
eventButton
的前缀, RightButton
和 eventSent
.它现在可以工作了:)(2)如何响应treeView行上的右键单击:
解决了上述问题后,我偶然发现了 this例如,它展示了如何响应在 treeView 中选择一行。所以我混合了这两个解决方案并想出了这样的东西(大部分代码来自 TreeView 示例,并进行了一些调整):
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
import Graphics.UI.Gtk.Gdk.Events as Ev
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
]
-- here comes the right-click popup
eda <- actionNew "EDA" "Edit" Nothing Nothing
pra <- actionNew "PRA" "Process" Nothing Nothing
rma <- actionNew "RMA" "Remove" Nothing Nothing
saa <- actionNew "SAA" "Save" Nothing Nothing
agr <- actionGroupNew "AGR1"
mapM_ (actionGroupAddAction agr) [eda,pra,rma,saa]
uiman <- uiManagerNew
uiManagerAddUiFromString uiman uiDecl
uiManagerInsertActionGroup uiman agr 0
maybePopup <- uiManagerGetWidget uiman "/ui/popup"
let pop = case maybePopup of
(Just x) -> x
Nothing -> error "Cannot get popup from string"
onButtonPress treeview (\x -> if (Ev.eventButton x) == Ev.RightButton
then do
menuPopup (castToMenu pop) Nothing
return (Ev.eventSent x)
else return (Ev.eventSent x))
mapM_ (prAct treeview list) [eda,pra,rma,saa]
onDestroy window mainQuit
widgetShowAll window
mainGUI
return ()
uiDecl = "<ui> \
\ <popup>\
\ <menuitem action=\"EDA\" />\
\ <menuitem action=\"PRA\" />\
\ <menuitem action=\"RMA\" />\
\ <separator />\
\ <menuitem action=\"SAA\" />\
\ </popup>\
\ </ui>"
-- Handle the right-click. You can write a function that'll respond to various
-- actions, like for example: handleAction "EDA" = do something, etc.
prAct treeview list a = onActionActivate a $ do
name <- actionGetName a
-- getting the selected row
tree <- Model.treeViewGetSelection treeview
-- you can also use treeSelectionGetSelected to get the Iter object
-- and then convert it to Int by using listStoreIterToIndex and so get
-- the ListStore item at given index
sel <- Model.treeSelectionGetSelectedRows tree
let s = head (head sel)
v <- Model.listStoreGetValue list s
putStrLn ("Action Name: " ++ name ++ " | Item: " ++ v)
我希望它会对某人有所帮助:)
干杯
关于user-interface - 在 TreeView 行上捕获右键单击事件 [haskell gtk2hs],我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/9383878/