with (Maplets[Elements]):
maplet := 
Maplet('onstartup'='Action1','reference'='Maplet1',
	Action('reference'='clickButton7',
		Evaluate('function'='diff(TextField1,x)','target'='MathMLViewer1','waitforresult'='true')),
	Action('reference'='clickButton6',
		Evaluate('function'='diff(TextField1,y)','target'='MathMLViewer2','waitforresult'='true')),
	Action('reference'='clickButton5'),
	Label('background'="#D6D3CE",'caption'="Derivace podle proměnné x:",'enabled'='true','foreground'="#000000",'reference'='Label2','visible'='true'),
	MathMLViewer('background'="#FFFFFF",'fontsize'='18','foreground'="#000000",'height'='100','reference'='MathMLViewer1','width'='300'),
	Label('background'="#D6D3CE",'caption'="Derivace podle proměnné y",'enabled'='true','foreground'="#000000",'reference'='Label3','visible'='true'),
	MathMLViewer('background'="#FFFFFF",'fontsize'='18','foreground'="#000000",'height'='100','reference'='MathMLViewer2','width'='300'),
	BoxLayout('background'="#D6D3CE",'border'='false','halign'='center','inset'='5','reference'='BoxLayout2','valign'='center','vertical'='true','visible'='true',
		BoxRow(
			BoxCell('hscroll'='never','value'='Label2','vscroll'='never'),
			BoxCell('hscroll'='never','value'='MathMLViewer1','vscroll'='never'),
			BoxCell('hscroll'='never','value'='Label3','vscroll'='never'),
			BoxCell('hscroll'='never','value'='MathMLViewer2','vscroll'='never'))),
	Label('background'="#D6D3CE",'caption'="Zadejte funkci dvou proměnných",'enabled'='true','foreground'="#000000",'reference'='Label1','visible'='true'),
	TextField('background'="#FFFFFF",'editable'='true','enabled'='true','foreground'="#000000",'halign'='left','reference'='TextField1','visible'='true','width'='20'),
	BoxLayout('background'="#D6D3CE",'border'='false','halign'='center','inset'='5','reference'='BoxLayout3','valign'='center','vertical'='true','visible'='true',
		BoxRow(
			BoxCell('hscroll'='never','value'='Label1','vscroll'='never'),
			BoxCell('hscroll'='never','value'='TextField1','vscroll'='never'))),
	Button('background'="#D6D3CE",'caption'="Derivuj podle x",'enabled'='true','foreground'="#000000",'onclick'='clickButton7','reference'='Button7','visible'='true'),
	Button('background'="#D6D3CE",'caption'="Derivuj podle y",'enabled'='true','foreground'="#000000",'onclick'='clickButton6','reference'='Button6','visible'='true'),
	Button('background'="#D6D3CE",'caption'="Button5",'enabled'='true','foreground'="#000000",'onclick'='clickButton5','reference'='Button5','visible'='true'),
	BoxLayout('background'="#D6D3CE",'border'='false','halign'='center','inset'='5','reference'='BoxLayout13','valign'='center','vertical'='true','visible'='true',
		BoxRow(
			BoxCell('hscroll'='never','value'='Button7','vscroll'='never'),
			BoxCell('hscroll'='never','value'='Button6','vscroll'='never'),
			BoxCell('hscroll'='never','value'='Button5','vscroll'='never'))),
	BoxLayout('background'="#D6D3CE",'border'='false','halign'='center','inset'='5','reference'='BoxLayout1','valign'='center','vertical'='false','visible'='true',
		BoxColumn(
			BoxColumn(
				BoxCell('hscroll'='never','value'='BoxLayout2','vscroll'='never')),
			BoxColumn(
				BoxCell('hscroll'='never','value'='BoxLayout3','vscroll'='never')),
			BoxColumn(
				BoxCell('hscroll'='never','value'='BoxLayout13','vscroll'='never')))),
	Window('layout'='BoxLayout1','reference'='Window1','resizable'='true','title'="Maplet"),
	Action('reference'='Action1',
		RunWindow('window'='Window1'))):

Maplets[Display](maplet);