OpenEuphoria

1. EuGTK - GTK_SELECTION_SINGLE?

• Posted by Jerry_Story Nov 15, 2010
• 1798 views

In GtkEnums.e I find:
GTK_SELECTION_NONE = 0,
GTK_SELECTION_SINGLE,
GTK_SELECTION_BROWSE,
GTK_SELECTION_MULTIPLE,

http://scentric.net/tutorial/sec-sel-click-menus.html

6.1.1. Selection Modes 
 
You can use gtk_tree_selection_set_mode to influence the way that selections are handled. There are four selection modes: 
 
GTK_SELECTION_NONE - no items can be selected 
 
GTK_SELECTION_SINGLE - no more than one item can be selected 
 
GTK_SELECTION_BROWSE - exactly one item is always selected 
 
GTK_SELECTION_MULTIPLE - anything between no item and all items can be selected 

Does this mean there is a way to do a single click event on a listview?

Single click would make more sense than double click in DMAK.

3. Re: EuGTK - GTK_SELECTION_SINGLE?

• Posted by irv Nov 15, 2010
• 1542 views

If you want to respond to a single-click of a mouse button, try connecting a generic event to the treeview/listview, then filtering the events to respond only to one particular mouse event:

function Foo(atom ctl, atom event) 
if peek(event) = 7 then -- mouse button released 
 if peek(event+40) = 1 then -- mouse left button 
  puts(1,get(tv,"text",column#)) 
 end if 
end if 
return 0 
end function 
constant foo = call_back(routine_id("Foo")) 
 
connect(tv,"event",foo) 

We wait for the button release, rather than getting the contents of the tv on mouse pressed (since the focus may not have changed to the control where the mouse is now sitting).

Alternate way, if you need the button #:

if peek(event) = 4 then -- some mouse button pressed 
 whichbtn = peek(event+40) -- 1, 2, or 3 == left, mid, right 
... 

Responding to a single-click means you can't select multiple items via "rubber banding". You still have ctl-click for that.

5. Re: EuGTK - GTK_SELECTION_SINGLE?

• Posted by irv Nov 15, 2010
• 1524 views

include GtkEngine.e 
include GtkListView.e as LV  
-- note change in name from ListView to GtkListView for 
-- consistency with EuGTK_4.3.0  
-- [[http://sourceforge.net/projects/eugtk/]] 
 
constant veg = { 
	{"Asparagus","raw",23,8,9}, 
	{"Beet greens","boiled",164,12,11}, 
	{"Broccoli","raw",43,14,23}, 
	{"Cabbage","boiled",36,6}, 
	{"Chard, swiss","boiled",102,5}, 
	{"Collards","boiled",266,4}, 
	{"Onions","raw",37,10} 
} 
 
object lv = LV:Iter(4)  
 
constant tv  = LV:View(lv,{"Name","prep","mg/oz","Serving (oz)"})  
	set(tv,"rules hint",TRUE) -- shade alternate lines 
	set(tv,"grid lines",GTK_TREE_VIEW_GRID_LINES_BOTH) 
 
object store = LV:Store({gSTR,gSTR,gINT,gINT})  
	set(tv,"model",store) 
	 
constant win = create(GtkWindow)  
	connect(win,"destroy",quit) 
	set(win,"border width",5) 
 
constant panel = create(GtkVBox) 
	add(win,panel) 
	add(panel,tv) 
 
for i = 1 to length(veg) do -- load the list store with data 
   LV:Row(lv,store,veg[i],1)  
end for 
 
show_all(win) 
 
function Foo(atom ctl, atom event) 
if peek(event) = 7 then 
	if peek(event+40) = 1 then -- left btn, 2=mid, 3=right 
		printf(1,"%s\n",{get(tv,"text",1)}) -- txt from first column 
	end if 
end if 
return 0 
end function 
connect(tv,"event",call_back(routine_id("Foo"))) 
 
/*  

 alternate: replace above with this and see which one works best.  
 Be aware that this method may cause false events to be triggered  
 Sorting, for example, would cause a change, as might  
 adding or deleting an item from the list! 
*/ 
 
/* 

function Foo() 
   printf(1,"%s\n",{get(tv,"text",1)}) 
 return 1 
 end function 
constant selection = get(tv,"selection") 
connect(selection,"changed",call_back(routine_id("Foo"))) 
*/ 
 
main()