Ui enhancements 2.0 (#31)

* canvas overhaul

* minor tweaks

* list mode for overview

* bugfixes + tweaks for editor 2.0

* minor tweaks

* more editor work

* refactor + new transitions

* use layout() where appropriate and cleanup

* mouse triple click + textEntry scroll ind

* cleanup

* cleanup + theme editor

* color rework + cleanup

* changes for deprecated ui methods

* can now use named colors

sys/apps/fileui.lua

@@ -0,0 +1,39 @@
+local UI   = require('opus.ui')
+local Util = require('opus.util')
+
+local shell  = _ENV.shell
+local multishell = _ENV.multishell
+
+-- fileui [--path=path] [--exec=filename] [--title=title]
+
+local page = UI.Page {
+	fileselect = UI.FileSelect { },
+	eventHandler = function(self, event)
+		if event.type == 'select_file' then
+			self.selected = event.file
+			UI:quit()
+
+		elseif event.type == 'select_cancel' then
+			UI:quit()
+		end
+
+		return UI.FileSelect.eventHandler(self, event)
+	end,
+}
+
+local _, args = Util.parse(...)
+
+if args.title and multishell then
+	multishell.setTitle(multishell.getCurrent(), args.title)
+end
+
+UI:setPage(page, args.path)
+UI:start()
+UI.term:setCursorBlink(false)
+
+if args.exec and page.selected then
+	shell.openForegroundTab(string.format('%s %s', args.exec, page.selected))
+	return
+end
+
+return page.selected