-- simple calculator on LUA for KolibriOS
--init global variables
disp=0 --display
stack=0 --stack
will=0 --operation
function drawwin()
--here we draw window
paintstart()
--begin redraw
window(10,10,153,180,65069280)
--define window
textout(3,13,0,"LuaCalc")
--print title
textout(6, 30, 0, disp)
--and display
--then we need make buttons and print labels of buttons
makebutton(6,60,20,20,17,13619151)
textout(9,63,0,"7")
makebutton(6,90,20,20,14,13619151)
textout(9,93,0,"4")
makebutton(6,120,20,20,11,13619151)
textout(9,123,0,"1")
makebutton(6,150,50,20,10,13619151)
textout(9,153,0,"0")
makebutton(36,60,20,20,18,13619151)
textout(39,63,0,"8")
makebutton(36,90,20,20,15,13619151)
textout(39,93,0,"5")
makebutton(36,120,20,20,12,13619151)
textout(39,123,0,"2")
makebutton(66,60,20,20,19,13619151)
textout(69,63,0,"9")
makebutton(66,90,20,20,16,13619151)
textout(69,93,0,"6")
makebutton(66,120,20,20,13,13619151)
textout(69,123,0,"3")
makebutton(96,60,20,20,20,13619151)
textout(99,63,0,"*")
makebutton(96,90,20,20,21,13619151)
textout(99,93,0,"/")
makebutton(96,120,20,20,22,13619151)
textout(99,123,0,"-")
makebutton(96,150,20,20,23,13619151)
textout(99,153,0,"+")
makebutton(126,60,20,20,30,13619151)
textout(129,63,0,"C")
makebutton(126,90,20,20,31,13619151)
textout(129,93,0,"CE")
makebutton(126,120,20,50,32,13619151)
textout(129,123,0,"=")
paintend()
--and finish redraw
end
--main loop
while 1==1 do --loop until exit
event=waitevent() --check the event
if event==1 then drawwin() end --redraw needed
if event==2 then key=getkey() end --get keyboard scancode
if event==3 then button=getbutton() --button pressed
if button==1 then sysexit() end --close button
if button==10 then disp=disp*10 end --numerical buttons - 0
if button==11 then disp=disp*10+1 end --1
if button==12 then disp=disp*10+2 end --2
if button==13 then disp=disp*10+3 end --3
if button==14 then disp=disp*10+4 end
if button==15 then disp=disp*10+5 end
if button==16 then disp=disp*10+6 end
if button==17 then disp=disp*10+7 end
if button==18 then disp=disp*10+8 end
if button==19 then disp=disp*10+9 end --and 9
if button==30 then disp=0
stack=0 end -- C button - clear disp and memory
if button==31 then disp=0 end -- CE button - clear disp
if button==20 then will=1
stack=disp
disp=0
end -- next is multiple
if button==21 then will=2
stack=disp
disp=0
end --next is divison
if button==22 then will=3
stack=disp
disp=0
end -- next is substraction
if button==23 then will=4
stack=disp
disp=0
end -- next is addition
if button==32 then --evalute
if will==1 then disp=stack*disp end
if will==2 then disp=stack/disp end
if will==3 then disp=stack-disp end
if will==4 then disp=stack+disp end
end
drawwin() --redraw... we need it after pressing buttons
end
end