simplify ui

apps/logMonitor.lua

@@ -36,6 +36,31 @@ elseif device.monitor then
   })
 end
 
+--[[-- ScrollingText --]]--
+UI.ScrollingText = class(UI.Window)
+UI.ScrollingText.defaults = {
+  UIElement = 'ScrollingText',
+  backgroundColor = colors.black,
+  buffer = { },
+}
+function UI.ScrollingText:appendLine(text)
+  if #self.buffer+1 >= self.height then
+    table.remove(self.buffer, 1)
+  end
+  table.insert(self.buffer, text)
+end
+
+function UI.ScrollingText:clear()
+  self.buffer = { }
+  UI.Window.clear(self)
+end
+
+function UI.ScrollingText:draw()
+  for k,text in ipairs(self.buffer) do
+    self:write(1, k, Util.widthify(text, self.width), self.backgroundColor)
+  end
+end
+
 terminal:clear()
 
 function getClient(id)