accept keyboard input after focusing using the mouse

0011-draw_sum_grid

@@ -1,8 +1,8 @@
 draw_sum_grid = function(g)
 	-- lines
 	love.graphics.setLineWidth(3)
-	local x1,y1 = 250,200
-	local x2,y2 = 450,400
+	local x1,y1 = X,Y
+	local x2,y2 = X+Square_side*2, Y+Square_side*2
 	love.graphics.line(x1,y1, x2,y1)
 	love.graphics.line(x1,y2, x2,y2)
 	love.graphics.line(x1,y1, x1,y2)

0017-on.keychord_press

@@ -9,5 +9,20 @@ on.keychord_press = function(chord, key)
 		elseif Draw == 'solution' then
 			Draw = 'problem'
 		end
+	elseif chord:match('%d') then
+		-- cursor visible
+		local x,y = Cursor[1], Cursor[2]
+		if x > 0 and y > 0 then
+			-- it's not in the provided square
+			if x ~= Problem.x or y ~= Problem.y then
+				local c = Problem.data[y][x]
+				local d = (string.byte(chord) - 48)
+				if c == '' then
+					Problem.data[y][x] = d
+				elseif c < 2 then  -- not overfull
+					Problem.data[y][x] = Problem.data[y][x]*10 + d
+				end
+			end
+		end
 	end
 end

0028-create_problem

@@ -11,4 +11,5 @@ create_problem = function()
 	local x = math.random(1, 2)
 	local y = math.random(1, 2)
 	Problem.data[y][x] = s.data[y][x]
+	Problem.x, Problem.y = x, y
 end

0029-Cursor

@@ -0,0 +1 @@
+Cursor = {0, 0}  -- x, y coordinate

0030-X

@@ -0,0 +1 @@
+X = 250

0031-Y

@@ -0,0 +1 @@
+Y = 200

0032-on.mouse_press

@@ -0,0 +1,13 @@
+on.mouse_press = function(x,y, mouse_button)
+	if x >= X and x < X+Square_side and y >= Y and y < Y+Square_side then
+		Cursor = {1, 1}
+	elseif x >= X+Square_side and x < X+Square_side*2 and y >= Y and y < Y+Square_side then
+		Cursor = {2, 1}
+	elseif x >= X and x < X+Square_side and y >= Y+Square_side and y < Y+Square_side*2 then
+		Cursor = {1, 2}
+	elseif x >= X+Square_side and x < X+Square_side*2 and y >= Y+Square_side and y < Y+Square_side*2 then
+		Cursor = {2, 2}
+	else
+		Cursor = {0, 0}  -- invalid
+	end
+end