try to fix background flash

README.markdown

@@ -28,7 +28,7 @@ A widget is tagged by multiple strings. loveui widgets are tagged with their own
 Every style has a "selector" - A string of tags separated by whitespace. The style will apply to widgets that contain all of the tags in side the "selector".
 
 To add a style:
-    widget:1add(style1)
+    widget1:add(style1)
 
 To remove,
     widget1:remove(widget2)

loveui/graphics/love.lua

@@ -15,6 +15,7 @@ draw = love.graphics.draw
 framebuffer = love.graphics.newFramebuffer
 rendertarget = love.graphics.setRenderTarget
 scissor = love.graphics.setScissor
+getscissor = love.graphics.getScissor
 newfont = love.graphics.newFont
 text = love.graphics.print
 time = love.timer.getTime
@@ -23,7 +24,6 @@ mouseheld = love.mouse.isDown
 mousex = love.mouse.getX
 mousey = love.mouse.getY
 
-
 function font(...)
   if ... then 
     if ... ~= love.graphics.getFont() then

loveui/ui/context.lua

@@ -121,6 +121,15 @@ function context:update(dt)
   context.__super.update(self, dt)
 end
 
+function context:draw()
+  local l, t, w, h = getscissor()
+  context.__super.draw(self)
+  if l then
+    scissor(l, t, w, h)
+  else
+    scissor()
+  end
+end
 
 test("ui.context.mousepressed", function()
     local c = context()

loveui/ui/widget.lua

@@ -694,7 +694,7 @@ end
 
 function widget:keyreleased(key, unicode)
   if key == "tab" then
-    if not self.focused then
+    if not self.focused or self.focused == self then
       self:focus(self.content[1])
     else
       for i, v in ipairs(self.content) do