refactor, nicer errors

3 files changed, 83 insertions, 27 deletions

diff --git a/main.lua b/main.lua
index 6888be6..ff0d56d 100644
--- a/main.lua
+++ b/main.lua
@@ -1,20 +1,17 @@
 local class = require 'class'
 local hsluv = require 'hsluv'
 local catenary = require 'catenary'
+local util = require 'util'
+local texts = require 'texts'
 
 local tau = 2*math.pi
 local ZOOM = 200
 local G = love.graphics
 
-local function mouse_pos()
-	-- in world space
-	return G.inverseTransformPoint(love.mouse.getPosition())
-end
-
 local function hovered(set)
 	-- returns which of the things in set is hovered over
 	-- or nil if no such thing
-	local mx,my = mouse_pos()
+	local mx,my = util.mouse_pos()
 	for s in pairs(set) do
 		if s:contains(mx,my) then
 			return s
@@ -23,20 +20,6 @@ local function hovered(set)
 	return nil
 end
 
-local function write_at(text,x,y)
-	local tx,ty = G.transformPoint(x,y)
-	G.push()
-	G.origin()
-	G.print(text,tx,ty)
-	G.pop()
-end
-
-local function phi_color(n)
-	local phi = (1+math.sqrt(5))/2
-	local h = (360*phi*n)%360
-	return hsluv.hsluv_to_rgb({h, 80, 60})
-end
-
 local Port = class()
 Port.R = 0.1
 function Port.make(cls, x,y, num)
@@ -52,10 +35,12 @@ function Port.draw(self, istate)
 		c[1] = 1
 	elseif istate == 'selected' then
 		c[2] = 1
+	elseif istate == 'editing' then
+		c[3] = 1
 	end
 	love.graphics.setColor(c)
 	G.circle('line',self.x,self.y,self.R)
-	write_at(self.n, self.x, self.y)
+	util.write_at(self.n, self.x, self.y)
 end
 function Port.contains(self, px,py)
 	local d = math.sqrt((self.x - px)^2 + (self.y - py)^2)
@@ -109,7 +94,9 @@ end
 function PortGraph.istate_of_port(self,port)
 	if self.state == 'joining' and self.selected == port then
 		return 'selected'
-	elseif port:contains(mouse_pos()) then
+	elseif self.state == 'editing' and self.selected == port then
+		return 'editing'
+	elseif port:contains(util.mouse_pos()) then
 		return 'hover'
 	else
 		return 'normal'
@@ -130,8 +117,8 @@ function PortGraph.draw(self)
 
 	if self.state == 'joining' then
 		local p = self.selected
-		G.setColor(phi_color(self.wire_n))
-		local mx,my = mouse_pos()
+		G.setColor(util.phi_color(self.wire_n))
+		local mx,my = util.mouse_pos()
 		G.line(catenary.catenary(p.x,p.y,mx,my))
 	end
 
@@ -159,7 +146,6 @@ function PortGraph.make_edit_handles(self)
 			color = w.color,
 			here = p,
 			there = q,
-			w = w,
 			pg = self,
 		},EditHandle)
 		hs[h] = true
@@ -237,7 +223,7 @@ function PortGraph.add_conn(self, p1,p2)
 	assert(not self:connection(p1,p2),
 		string.format("%s and %s already connected!", p1,p2))
 
-	local wire = Wire:make(p1, p2, phi_color(self.wire_n))
+	local wire = Wire:make(p1, p2, util.phi_color(self.wire_n))
 	self.wires[wire] = true
 	p1.conns[p2] = wire
 	p2.conns[p1] = wire
@@ -259,7 +245,10 @@ for i = 1,n do
 end
 
 function love.mousepressed(x,y,b)
-	pg:click(b)
+	local ok, err = pcall(pg.click, pg, b)
+	if not ok then
+		texts.add(err,util.mouse_pos())
+	end
 end
 
 function love.draw()
@@ -273,5 +262,10 @@ function love.draw()
 
 	pg:draw()
 
+	texts.draw()
+
 end
 
+function love.update(dt)
+	texts.update(dt)
+end
diff --git a/texts.lua b/texts.lua
new file mode 100644
index 0000000..9f9ff97
--- /dev/null
+++ b/texts.lua
@@ -0,0 +1,35 @@
+local util = require 'util'
+
+local texts = {}
+
+local function add(text,x,y)
+	table.insert(texts,{
+		x=x,y=y,life=3,text=text
+	})
+end
+
+local function draw()
+	for i=#texts,1,-1 do
+		local t = texts[i]
+		util.write_at(t.text,t.x,t.y)
+	end
+end
+
+local SPEED = 0.1
+
+local function update(dt)
+	for i=#texts,1,-1 do
+		local t = texts[i]
+		t.y = t.y - SPEED * dt
+		t.life = t.life - dt
+		if t.life < 0 then
+			table.remove(texts, i)
+		end
+	end
+end
+
+return {
+	add=add,
+	update=update,
+	draw=draw,
+}
diff --git a/util.lua b/util.lua
new file mode 100644
index 0000000..6172d84
--- /dev/null
+++ b/util.lua
@@ -0,0 +1,27 @@
+local hsluv = require 'hsluv'
+
+local G = love.graphics
+local function mouse_pos()
+	-- in world space
+	return G.inverseTransformPoint(love.mouse.getPosition())
+end
+
+local function write_at(text,x,y)
+	local tx,ty = G.transformPoint(x,y)
+	G.push()
+	G.origin()
+	G.print(text,tx,ty)
+	G.pop()
+end
+
+local function phi_color(n)
+	local phi = (1+math.sqrt(5))/2
+	local h = (360*phi*n)%360
+	return hsluv.hsluv_to_rgb({h, 80, 60})
+end
+
+return {
+	mouse_pos = mouse_pos,
+	write_at = write_at,
+	phi_color = phi_color,
+}