move apis into rom/modules/main for shell compatibility

sys/modules/opus/ui/components/Dialog.lua

@@ -0,0 +1,39 @@
+local Canvas = require('opus.ui.canvas')
+local class  = require('opus.class')
+local UI     = require('opus.ui')
+
+local colors = _G.colors
+
+UI.Dialog = class(UI.SlideOut)
+UI.Dialog.defaults = {
+	UIElement = 'Dialog',
+	height = 7,
+	textColor = colors.black,
+	backgroundColor = colors.white,
+	okEvent ='dialog_ok',
+	cancelEvent = 'dialog_cancel',
+}
+function UI.Dialog:postInit()
+	self.y = -self.height
+	self.titleBar = UI.TitleBar({ event = self.cancelEvent, title = self.title })
+end
+
+function UI.Dialog:show(...)
+	local canvas = self.parent:getCanvas()
+	self.oldPalette = canvas.palette
+	canvas:applyPalette(Canvas.darkPalette)
+	UI.SlideOut.show(self, ...)
+end
+
+function UI.Dialog:hide(...)
+	self.parent:getCanvas().palette = self.oldPalette
+	UI.SlideOut.hide(self, ...)
+	self.parent:draw()
+end
+
+function UI.Dialog:eventHandler(event)
+	if event.type == 'dialog_cancel' then
+		self:hide()
+	end
+	return UI.SlideOut.eventHandler(self, event)
+end