milo: simplify learn types + monitor resize

milo/core/learnWizard.lua

@@ -0,0 +1,90 @@
+local Milo   = require('milo')
+local UI     = require('ui')
+
+local turtle = _G.turtle
+
+local learnPage = UI.Page {
+  titleBar = UI.TitleBar { title = 'Learn Recipe' },
+  wizard = UI.Wizard {
+    y = 2, ey = -2,
+    pages = {
+      general = UI.Window {
+        index = 1,
+        grid = UI.ScrollingGrid {
+          x = 2, ex = -2, y = 2, ey = -2,
+          disableHeader = true,
+          columns = {
+            { heading = 'Name', key = 'name'},
+          },
+          sortColumn = 'name',
+        },
+      },
+    },
+  },
+  notification = UI.Notification { },
+}
+
+local general = learnPage.wizard.pages.general
+
+function general:validate()
+  Milo:setState('learnType', self.grid:getSelected().value)
+  return true
+end
+
+function learnPage:enable()
+  local t = { }
+
+  for _, page in pairs(self.wizard.pages) do
+    if page.validFor then
+      t[page.validFor] = {
+        name = page.validFor,
+        value = page.validFor,
+      }
+    end
+  end
+  general.grid:setValues(t)
+  general.grid:setSelected('name', Milo:getState('learnType') or '')
+
+  Milo:pauseCrafting({ key = 'gridInUse', msg = 'Crafting paused' })
+
+  self:focusFirst()
+  UI.Page.enable(self)
+end
+
+function learnPage:disable()
+  Milo:resumeCrafting({ key = 'gridInUse' })
+  return UI.Page.disable(self)
+end
+
+function learnPage.wizard:getPage(index)
+  local pages = { }
+  table.insert(pages, general)
+  local selected = general.grid:getSelected()
+  for _, page in pairs(self.pages) do
+    if page.validFor and (not selected or selected.value == page.validFor) then
+      table.insert(pages, page)
+    end
+  end
+  table.sort(pages, function(a, b)
+    return a.index < b.index
+  end)
+
+  return pages[index]
+end
+
+function learnPage:eventHandler(event)
+  if event.type == 'cancel' then
+    turtle.emptyInventory()
+    UI:setPreviousPage()
+
+  elseif event.type  == 'form_invalid' or event.type == 'general_error' then
+    self.notification:error(event.message)
+    self:setFocus(event.field)
+
+  else
+    return UI.Page.eventHandler(self, event)
+  end
+  return true
+end
+
+UI:addPage('learnWizard', learnPage)