OpenEuphoria

2. Re: EuGTK - List: View - click event

• Posted by irv Sep 25, 2010
• 1480 views

Just connect the "row-activated" signal to your eu routine. This works on double-click - obviously, since a single click only selects a row. See demo below. But first: DOWNLOAD THE LATEST EuGTK 4.2.4! There are many improvements, including fixing one severe memory leak! Get it from wikispaces or my home page or SourceForge

include GtkEngine.e 
include std/machine.e 
include ListView.e as LV 
 
enum VEG, MG, SERV 
 
constant veg = { 
	{"Asparagus, raw",23,8}, 
	{"Beet greens, boiled",164,12}, 
	{"Broccoli, raw",43,14}, 
	{"Cabbage, boiled",36,6}, 
	{"Chard, swiss, boiled",102,5}, 
	{"Collards, boiled",266,4}, 
	{"Onions, raw",37,10} 
} 
 
function Foo(atom view) 
sequence selected_food = get(view,"text",VEG)  
integer selected_serv = get(view,"value",SERV) 
printf(1,"The recommended serving for %s is %d oz.\n",{selected_food,selected_serv}) 
return 1 
end function 
constant foo = call_back(routine_id("Foo")) 
 
object lv = LV:Iter(4)  
 
constant tv  = LV:View(lv,{"Name","mg/oz","Serving (oz)"}) -- {column headings}  
	set(tv,"reorderable",TRUE)  
	set(tv,"rules hint",TRUE) -- shade alternate lines 
	set(tv,"grid lines",GTK_TREE_VIEW_GRID_LINES_BOTH) 
        set(tv,"enable search",TRUE) -- < optional, but real handy. try it, you'll like it > 
	connect(tv,"row-activated",foo) -- < here > 
	 
constant img = create(GtkImage,"/home/irv/demos/tiphat.gif") 
 
constant win = create(GtkWindow)  
	connect(win,"destroy",quit) 
	set(win,"modify bg",0,"lightgray") 
	set(win,"border width",5) 
 
constant panel = create(GtkVBox) 
	add(win,panel) 
	add(panel,tv) 
 
object store = LV:Store({gSTR,gINT,gINT}) -- {column data types} 
	set(tv,"model",store) 
 
for i = 1 to length(veg) do -- load the list store with data 
   LV:Row(lv,store,veg[i])  
end for 
 
setRow(2,1,store,"Arthritic Aardvaarks") 
-- row #, col #, store, value) 
 
show_all(win) 
main() 

Note: You seldom want to trigger a list or tree view event from a single click. 1. It doesn't work the way people expect it to if you do that 2. It prevents you from setting up lists which allow multiple selections 3. It prevents the user from being able to drag & drop items within the list

4. Re: EuGTK - List: View - click event

• Posted by irv Sep 26, 2010
• 1464 views

I changed it to Iter, since it didn't create a ListView at all, just an Iter and corresponding renderers. LV:View creates the view, LV:Store creates a store, etc.

I still want to find a way to encapsulate all of these calls into sort of a pseudo 'listview object', which will be able to keep track of all these things itself, without the programmer having to do it.

6. Re: EuGTK - List: View - click event

• Posted by Jerry_Story Sep 27, 2010
• 1304 views
• Last edited Sep 26, 2010

Thanks. I think I made enough progress that it looks like I might eventually get it done. If I counted right, I have 12 files nominally done (need more testing), 1 file in progress, 2 files that are not important and might be skipped because they use grid, and 2 files not yet worked on. I'm doing a line by line translation from wxEuphoria to EuGTK. Every once in a while I get snagged on something.

8. Re: EuGTK - List: View - click event

• Posted by Jerry_Story Sep 27, 2010
• 1223 views

I will drop color coding in the nutrients list and use prefixes instead, like I used "* " and "# " for foods. That's one less thing for me to figure out.

About multiple windows instead of all in one window. That will come under consideration after I get the program to work. Re-designing the program and learning EuGTK both at the same time is more than I can handle.

10. Re: EuGTK - List: View - click event

• Posted by euphoric (admin) Sep 27, 2010
• 1252 views

lolz

irv, fyi, the double dash (--) causes strikethrough unless you put brackets around it {{{--}}}.