init {
	screenTemplates := {
				"000": {"widgets": {"001": {"type": "textInput", "text": "", "state": 0}, 
									"002": {"type": "button", "text": "Next", "state": 0}}, 
						"layout": true},
				"001": {"widgets": {"003": {"type": "label", "text": "label", "state": 0}, 
									"004": {"type": "button", "text": "Back", "state": 0}}, 
						"layout": true}
				}
}
 
native channel ScreenUpdate {
	in screen(curSc: Json, update(curSc, nextSc)) = nextSc
}
 
native channel SetLayout {
	in screen.layout(curLayout: Bool, setLayout(nextLayout)) = nextLayout
}
 
native channel SetVisible(wid: Str) {
	in screen.widgets.{wid}.visible(curVisible: Bool, setVisible(nextVisible)) = nextVisible
}
 
native channel SetText(wid: Str) {
	in screen.widgets.{wid}.text(curText: Str, setText(nextText)) = nextText
}
 
native channel SetX(wid: Str) {
	in screen.widgets.{wid}.x(curX: Int, setX(nextX)) = nextX
}
 
native channel SetY(wid: Str) {
	in screen.widgets.{wid}.y(curY: Int, setY(nextY)) = nextY
}
 
native channel SetWidth(wid: Str) {
	in screen.widgets.{wid}.width(curWidth: Int, setWidth(nextWidth)) = nextWidth
}
 
native channel SetHeight(wid: Str) {
	in screen.widgets.{wid}.height(curHeight: Int, setHeight(nextHeight)) = nextHeight
}
 
native channel MouseEvent(wid: Str) {
	out screen.widgets.{wid}.state(curState: Int, mouseEvent(nextState)) = nextState
}
 
native channel TextEvent(wid: Str) {
	out screen.widgets.{wid}.text(curText: Str, textEvent(nextText)) = nextText
}
 
channel ChangeCurScreen {
	out curScreen(curScId: Str, changeCurScreen(nextScId)) = nextScId
}
 
channel ScreenTransition {
	in curScreen(curScId: Str, transScreen(nextScId, screen)) = nextScId
	ref screenTemplates.{nextScId}(screen, transScreen(nextScId, screen))
	out screen(curS, transScreen(nextScId, screen)) = screen
}
 
channel EventDispatch(wid: Str) {
	in screen.widgets.{wid}.state(curState: Int, dispatchEvent(curScId, wid, nextState)) = nextState
	ref curScreen(curScId: Str, dispatchEvent(curScId, wid, nextState))
	out screenTemplates.{curScId}.widgets.{wid}.state(curState: Int, dispatchEvent(curScId, wid, nextState)) = nextState
}
 
channel EventHandler1(scId: Str, wid: Str) {
	in screenTemplates.{scId="000"}.widgets.{wid="002"}.state(curState: Int, handleEvent1(nextState)) = nextState
	out curScreen(curScId: Str, handleEvent1(nextState)) = if(nextState == 0, "001", curScId)
}
 
channel EventHandler2(scId: Str, wid: Str) {
	in screenTemplates.{scId="001"}.widgets.{wid="004"}.state(curState: Int, handleEvent2(nextState)) = nextState
	out curScreen(curScId: Str, handleEvent2(nextState)) = if(nextState == 0, "000", curScId)
}
 
channel ChangeLayout {
	out screen.layout(curLayout: Bool, changeLayout(layout)) = layout
}
 
channel ChangeX(wid: Str) {
	out screen.widgets.{wid}.x(curX: Int, changeX(x)) = x
}
 
channel ChangeY(wid: Str) {
	out screen.widgets.{wid}.y(curY: Int, changeY(y)) = y
}
 
channel AddButton {
	out screen.widgets(widgets: Map, addButton(wid: Str, text: Str)) = insert(widgets, wid, {"type": "button", "text": text, "state": 0})
}
 
channel AddLabel {
	out screen.widgets(widgets: Map, addLabel(wid: Str, text: Str)) = insert(widgets, wid, {"type": "label", "text": text, "state": 0})
}
 
channel AddTextInput {
	out screen.widgets(widgets: Map, addTextInput(wid: Str)) = insert(widgets, wid, {"type": "textInput", "text": "", "state": 0})
}
 
channel AddMovableButton {
	out screen.widgets(widgets: Map, addMovableButton(wid: Str, text: Str, x: Int, y: Int, width: Int, height: Int)) = insert(widgets, wid, {"type": "button", "text": text, "x": x, "y": y, "width": width, "height": height, "state": 0})
}
 
channel AddMovableLabel {
	out screen.widgets(widgets: Map, addMovableLabel(wid: Str, text: Str, x: Int, y: Int, width: Int, height: Int)) = insert(widgets, wid, {"type": "label", "text": text, "x": x, "y": y, "width": width, "height": height, "state": 0})
}
 
channel AddMovableTextInput {
	out screen.widgets(widgets: Map, addMovableTextInput(wid: Str, x: Int, y: Int, width: Int, height: Int)) = insert(widgets, wid, {"type": "textInput", "text": "", "x": x, "y": y, "width": width, "height": height, "state": 0})
}