How can I write simple Lua code for Logitech mouse? - lua

Question

I am trying to make a script for logitech mouse that:
When left mouse button is pressed, it will activate case 1
When holding the right mouse button and pressing the left mouse button, it will activate the case 2
However, no matter how I try it will only work on case 1.
EnablePrimaryMouseButtonEvents(true)
function OnEvent(event, arg)
-- Case 1: Press only Button 1
if (event == "MOUSE_BUTTON_PRESSED" and arg == 1 and IsKeyLockOn("scrolllock") == false) then
Sleep(77)
if (IsMouseButtonPressed(1)) then
MoveMouseRelative(0, 4)
Sleep(76)
end
if (IsMouseButtonPressed(1)) then
MoveMouseRelative(0, 6)
Sleep(62)
end
if (IsMouseButtonPressed(1)) then
MoveMouseRelative(0, 5)
Sleep(84)
end
--Case 2: Press button 1+2
elseif (event == "MOUSE_BUTTON_PRESSED" and arg == 2 and IsKeyLockOn("scrolllock") == false) then
Sleep(77)
if (IsMouseButtonPressed(1)) then
MoveMouseRelative(0, 8)
Sleep(76)
end
if (IsMouseButtonPressed(1)) then
MoveMouseRelative(0, 9)
Sleep(62)
end
if (IsMouseButtonPressed(1)) then
MoveMouseRelative(0, 0)
Sleep(84)
end
end
end
I want to add one more case when I press RMB of this script:
When pressed RMB -> press Lshift button
When release RMB -> press Lshift button again
I added the end of the script as below, it does not work.
elseif (event == "MOUSE_BUTTON_PRESSED" and arg==2 and IsKeyLockOn("scrolllock")==false) then
PressAndReleaseKey("lshift")
elseif (event == "MOUSE_BUTTON_RELEASED" and arg==2 and IsKeyLockOn("scrolllock")==false) then
PressAndReleaseKey("lshift")
if I want to add case 3: Press LAlt + LMB, so where do I put IsModifierPressed("lalt") ? I tried as below but failed
function OnEvent(event, arg)
if (event == "MOUSE_BUTTON_PRESSED" and arg == 1 and not IsKeyLockOn("scrolllock")) then
if not IsMouseButtonPressed(3) then -- 3 = Right Mouse Button (it's the same button as arg==2)
-- Case 1: Press only LMB
if IsModifierPressed("lalt") then
-- Case 3: Press LAlt+LMB
else
-- Case 2: Press RMB+LMB
end
elseif ((event == "MOUSE_BUTTON_PRESSED" or event == "MOUSE_BUTTON_RELEASED") and arg==2 and not IsKeyLockOn("scrolllock")) then
PressKey("lshift")
Sleep(50)
ReleaseKey("lshift")
end
end

Answer 1

function OnEvent(event, arg)
if (event == "MOUSE_BUTTON_PRESSED" and arg == 1 and not IsKeyLockOn("scrolllock")) then
if IsModifierPressed("lalt") then
-- Case 3: Press LAlt+LMB
elseif not IsMouseButtonPressed(3) then -- 3 = Right Mouse Button (it's the same button as arg==2)
-- Case 1: Press only LMB
else
-- Case 2: Press RMB+LMB
end
elseif ((event == "MOUSE_BUTTON_PRESSED" or event == "MOUSE_BUTTON_RELEASED") and arg==2 and not IsKeyLockOn("scrolllock")) then
PressKey("lshift")
Sleep(50)
ReleaseKey("lshift")
end
end

Answer 2

You must not have an end before an elseif. The elseif serves as the end of the last if automatically.
I'm surprised this code even compiles and runs at all, as you mentioned, that the first case does work.
Edit: You also do not need to use parentheses around the condition of an if. Since it is already encapsulated by if and then it was not necessary for the langugae design to make those mandatory as in other languages.