with (Maplets[Elements]):
maplet := 
Maplet('onstartup'='Action1','reference'='Maplet1',
	Action('reference'='clickButton2',
		Evaluate('function'='(TextField2-TextField4)/(TextField1-TextField3)','target'='MathMLViewer3','waitforresult'='true')),
	Action('reference'='clickButton3',
		Evaluate('function'='TextField2 - (TextField2-TextField4)/(TextField1-TextField3)*TextField1',`option`="value",'target'='MathMLViewer2','waitforresult'='true')),
	Action('reference'='clickButton1'),
	Label('background'="#D6D3CE",'caption'="x-ová souřadnice bodu A",'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'))),
	Label('background'="#D6D3CE",'caption'="x-ová souřadnice bodu B",'enabled'='true','foreground'="#000000",'reference'='Label4','visible'='true'),
	TextField('background'="#FFFFFF",'editable'='true','enabled'='true','foreground'="#000000",'halign'='left','reference'='TextField3','visible'='true','width'='20'),
	BoxLayout('background'="#D6D3CE",'border'='false','halign'='center','inset'='5','reference'='BoxLayout4','valign'='center','vertical'='true','visible'='true',
		BoxRow(
			BoxCell('hscroll'='never','value'='Label4','vscroll'='never'),
			BoxCell('hscroll'='never','value'='TextField3','vscroll'='never'))),
	BoxLayout('background'="#D6D3CE",'border'='false','halign'='center','inset'='5','reference'='BoxLayout2','valign'='center','vertical'='false','visible'='true',
		BoxColumn(
			BoxCell('hscroll'='never','value'='BoxLayout3','vscroll'='never'),
			BoxCell('hscroll'='never','value'='BoxLayout4','vscroll'='never'))),
	Label('background'="#D6D3CE",'caption'="y-ová souřadnice bodu A",'enabled'='true','foreground'="#000000",'reference'='Label2','visible'='true'),
	TextField('background'="#FFFFFF",'editable'='true','enabled'='true','foreground'="#000000",'halign'='left','reference'='TextField2','visible'='true','width'='20'),
	BoxLayout('background'="#D6D3CE",'border'='false','halign'='center','inset'='5','reference'='BoxLayout6','valign'='center','vertical'='true','visible'='true',
		BoxRow(
			BoxCell('hscroll'='never','value'='Label2','vscroll'='never'),
			BoxCell('hscroll'='never','value'='TextField2','vscroll'='never'))),
	Label('background'="#D6D3CE",'caption'="y-ová souřadnice bodu B",'enabled'='true','foreground'="#000000",'reference'='Label5','visible'='true'),
	TextField('background'="#FFFFFF",'editable'='true','enabled'='true','foreground'="#000000",'halign'='left','reference'='TextField4','visible'='true','width'='20'),
	BoxLayout('background'="#D6D3CE",'border'='false','halign'='center','inset'='5','reference'='BoxLayout7','valign'='center','vertical'='true','visible'='true',
		BoxRow(
			BoxCell('hscroll'='never','value'='Label5','vscroll'='never'),
			BoxCell('hscroll'='never','value'='TextField4','vscroll'='never'))),
	BoxLayout('background'="#D6D3CE",'border'='false','halign'='center','inset'='5','reference'='BoxLayout5','valign'='center','vertical'='false','visible'='true',
		BoxColumn(
			BoxCell('hscroll'='never','value'='BoxLayout6','vscroll'='never'),
			BoxCell('hscroll'='never','value'='BoxLayout7','vscroll'='never'))),
	Button('background'="#D6D3CE",'caption'="Výpočet směrnice",'enabled'='true','foreground'="#000000",'onclick'='clickButton2','reference'='Button2','visible'='true'),
	Button('background'="#D6D3CE",'caption'="Výpočet konstanty",'enabled'='true','foreground'="#000000",'onclick'='clickButton3','reference'='Button3','visible'='true'),
	Button('background'="#D6D3CE",'caption'="Button1",'enabled'='true','foreground'="#000000",'onclick'='clickButton1','reference'='Button1','visible'='true'),
	Label('background'="#D6D3CE",'caption'="y=",'enabled'='true','foreground'="#000000",'reference'='Label6','visible'='true'),
	MathMLViewer('background'="#FFFFFF",'fontsize'='18','foreground'="#000000",'height'='100','reference'='MathMLViewer3','width'='300'),
	Label('background'="#D6D3CE",'caption'="x         +",'enabled'='true','foreground'="#000000",'reference'='Label7','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'='BoxLayout1','valign'='center','vertical'='false','visible'='true',
		BoxColumn(
			BoxRow(
				BoxCell('hscroll'='never','value'='BoxLayout2','vscroll'='never'),
				BoxCell('hscroll'='never','value'='BoxLayout5','vscroll'='never')),
			BoxRow(
				BoxCell('hscroll'='never','value'='Button2','vscroll'='never'),
				BoxCell('hscroll'='never','value'='Button3','vscroll'='never'),
				BoxCell('hscroll'='never','value'='Button1','vscroll'='never')),
			BoxRow(
				BoxCell('hscroll'='never','value'='Label6','vscroll'='never'),
				BoxCell('hscroll'='never','value'='MathMLViewer3','vscroll'='never'),
				BoxCell('hscroll'='never','value'='Label7','vscroll'='never'),
				BoxCell('hscroll'='never','value'='MathMLViewer2','vscroll'='never')))),
	Window('layout'='BoxLayout1','reference'='Window1','resizable'='true','title'="Maplet"),
	Action('reference'='Action1',
		RunWindow('window'='Window1'))):

Maplets[Display](maplet);