Allow setting custom widget ids

button.lua

@@ -48,7 +48,7 @@ return function(w)
 	end
 
 	-- Generate unique identifier for gui state update and querying.
-	local id = core.generateID()
+	local id = w.id or core.generateID()
 
 	-- group.getRect determines the position and size of the widget according
 	-- to the currently active group. Both arguments may be omitted.

checkbox.lua

@@ -48,7 +48,7 @@ return function(w)
 		w.size[1] = w.size[1] + bw + 4
 	end
 
-	local id = core.generateID()
+	local id = w.id or core.generateID()
 	local pos, size = group.getRect(w.pos, w.size)
 
 	mouse.updateWidget(id, pos, size, w.widgetHit)

core.lua

@@ -65,10 +65,15 @@ end
 --
 -- Widget ID
 --
-local maxid = 0
+local maxid, uids = 0, {}
+setmetatable(uids, {__index = function(t, i)
+	t[i] = {}
+	return t[i]
+end})
+
 local function generateID()
 	maxid = maxid + 1
-	return maxid
+	return uids[maxid]
 end
 
 --

input.lua

@@ -36,7 +36,7 @@ return function(w)
 	w.info.text = w.info.text or ""
 	w.info.cursor = math.min(w.info.cursor or w.info.text:len(), w.info.text:len())
 
-	local id = core.generateID()
+	local id = w.id or core.generateID()
 	local pos, size = group.getRect(w.pos, w.size)
 	mouse.updateWidget(id, pos, size, w.widgetHit)
 	keyboard.makeCyclable(id)

label.lua

@@ -46,7 +46,7 @@ return function(w)
 		end
 	end
 
-	local id = core.generateID()
+	local id = w.id or core.generateID()
 	local pos, size = group.getRect(w.pos, w.size)
 
 	if keyboard.hasFocus(id) then

slider.lua

@@ -38,7 +38,7 @@ return function(w)
 	w.info.step = w.info.step or (w.info.max - w.info.min) / 20
 	local fraction = (w.info.value - w.info.min) / (w.info.max - w.info.min)
 
-	local id = core.generateID()
+	local id = w.id or core.generateID()
 	local pos, size = group.getRect(w.pos, w.info.size)
 
 	mouse.updateWidget(id, pos, size, w.widgetHit)

slider2d.lua

@@ -51,7 +51,7 @@ return function(w)
 		(w.info.value[2] - w.info.min[2]) / (w.info.max[2] - w.info.min[2]),
 	}
 
-	local id = core.generateID()
+	local id = w.id or core.generateID()
 	local pos, size = group.getRect(w.pos, w.size)
 
 	mouse.updateWidget(id, pos, size, w.widgetHit)