alternate support

sys/apps/system/alternate.lua

@@ -0,0 +1,80 @@
+local Array  = require('opus.array')
+local Config = require('opus.config')
+local UI     = require('opus.ui')
+
+local colors     = _G.colors
+
+local tab = UI.Tab {
+	tabTitle = 'Preferred',
+	description = 'Select preferred applications',
+	apps = UI.ScrollingGrid {
+		x = 2, y = 2,
+		ex = 12, ey = -3,
+		columns = {
+			{ key = 'name' },
+		},
+		sortColumn = 'name',
+		disableHeader = true,
+	},
+	choices = UI.Grid {
+		x = 14, y = 2,
+		ex = -2, ey = -3,
+		disableHeader = true,
+		columns = {
+			{ key = 'file' },
+		}
+	},
+	statusBar = UI.StatusBar {
+		values = 'Double-click to set as preferred'
+	},
+}
+
+function tab.choices:getRowTextColor(row)
+	if row == self.values[1] then
+		return colors.yellow
+	end
+	return UI.Grid.getRowTextColor(self, row)
+end
+
+function tab:updateChoices()
+	local app = self.apps:getSelected().name
+	local choices = { }
+	for _, v in pairs(self.config[app]) do
+		table.insert(choices, { file = v })
+	end
+	self.choices:setValues(choices)
+	self.choices:draw()
+end
+
+function tab:enable()
+	self.config = Config.load('alternate')
+
+	local apps = { }
+	for k, _ in pairs(self.config) do
+		table.insert(apps, { name = k })
+	end
+	self.apps:setValues(apps)
+
+	self:updateChoices()
+
+	UI.Tab.enable(self)
+end
+
+function tab:eventHandler(event)
+	if event.type == 'grid_focus_row' and event.element == self.apps then
+		self:updateChoices()
+
+	elseif event.type == 'grid_select' and event.element == self.choices then
+		local app = self.apps:getSelected().name
+		Array.removeByValue(self.config[app], event.selected.file)
+		table.insert(self.config[app], 1, event.selected.file)
+		self:updateChoices()
+		Config.update('alternate', self.config)
+
+	else
+		return UI.Tab.eventHandler(self, event)
+	end
+	return true
+end
+
+return tab