multiselect region can be drawn with the right mouse button

code/camera.lua

@@ -77,3 +77,16 @@ function Camera:positionAt(x,y)
 	self.pos.y = math.floor((y/self.height)*self.height)
 end
 
+-- translate screen coordinates to game coordinates
+function Camera:ptScreenToGame(pt)
+	return self.pos + pt
+end
+
+function Camera:mouseScreenPos()
+	return Point:new(love.mouse.getX(),love.mouse.getY()) / game.scale
+end
+
+-- return the mouse position as game coordinates
+function Camera:mouseGamePos()
+	return self:ptScreenToGame(self:mouseScreenPos())
+end

code/editor.lua

@@ -8,6 +8,7 @@ editor = {
 	},
 	multiselect = {
 		active = false,
+		sweeping = false,
 		box = nil,
 	},
 	pan = { fixed = false, speed = 3 },
@@ -16,6 +17,20 @@ editor = {
 function stepEditor()
 	
 	animateTiles()
+	local osweep = editor.multiselect.sweeping
+	editor.multiselect.sweeping = love.mouse.isDown(2)
+	frameDebug("sweeping: "..tostring(editor.multiselect.sweeping))
+	if editor.multiselect.sweeping and not editor.multiselect.active then
+		print("multiselect enabled")
+		editor.multiselect.active = true
+	end
+	if not osweep and osweep ~= editor.multiselect.sweeping then
+		editor.multiselect.box = nil
+	end
+	if editor.multiselect.active then
+		doEditorMultiselect()
+	end
+	
 	if Keybind:checkPressed(Keybind.editor.room_mode) then
 		if love.keyboard.isDown("lshift") then
 			editor.room_mode = "delete"
@@ -125,6 +140,10 @@ function drawEditor()
 	if editor.palette.active then
 		doEditorPalette()
 	end
+	if editor.multiselect.box ~= nil then
+		frameDebug("drawing multiselect "..tostring(editor.multiselect.box))
+		drawEditorMultiselect()
+	end
 end
 
 function doEditorEdit()
@@ -351,6 +370,25 @@ end
 function drawEditorRooms()
 	for _, room in pairs(LoadedObjects.Rooms) do
 		love.graphics.setColor(0,0,100,1)
-		love.graphics.rectangle("line",room.from.x-Camera.pos.x, room.from.y-Camera.pos.y, room.width, room.height)
+		room:asRect():draw("line")
+		--love.graphics.rectangle("line",room.from.x-Camera.pos.x, room.from.y-Camera.pos.y, room.width, room.height)
 	end
 end
+
+function drawEditorMultiselect()
+	love.graphics.setColor(100,100,50,1)
+	editor.multiselect.box:draw("line")	
+end
+
+function doEditorMultiselect()
+	local mousept = Camera:mouseGamePos()
+	if editor.multiselect.box == nil then
+		print("sweep started")
+		editor.multiselect.box = Rect:fromPoints(mousept, mousept)
+		print("box: "..tostring(editor.multiselect.box))
+	elseif editor.multiselect.sweeping then
+		editor.multiselect.box.max = mousept
+		frameDebug("swept to "..tostring(mousept))
+	end
+end
+

code/rect.lua

@@ -6,6 +6,7 @@ Rect.__index = Rect
 function Rect:fromPoints(pt1, pt2)
 	local o = { min = pt1, max = pt2 }
 	setmetatable(o, self)
+	return o
 end
 
 function Rect:fromCoords(x1, y1, x2, y2)
@@ -64,3 +65,11 @@ function Rect:overlapsRect(other)
 		return self.min.x<other.max.x and self.min.x<other.max.x and
 	       self.min.y<other.max.y and self.min.y<other.max.y
 end
+
+function Rect:draw(style)
+	love.graphics.rectangle(style, self.min.x - Camera.pos.x, self.min.y - Camera.pos.y, self:width(), self:height())
+end
+
+function Rect:__tostring()
+	return "Rect["..tostring(self.min).." "..tostring(self.max).."]"
+end