conditional form?

Hi,

can somebody provide a sample on how to build a conditional form?

My code:

local function setupForm(formId)
-- load sensors
sensorsAvailable = {}
local available = system.getSensors();
local formSensors={}
local formSensorsIndex=-1
for index,sensor in ipairs(available) do
if(sensor.param == 0 and
(string.sub(sensor.label, 1, 3) == _MUI or
string.sub(sensor.label, 1, 5) == _MEZON)
) then
formSensors[#formSensors+1] = sensor.label
sensorsAvailable[#sensorsAvailable+1] = sensor
if(sensor.id==sensorId ) then
formSensorsIndex=#sensorsAvailable
end
end
end

-- form title
form.setTitle(locale.SetupFormTitle);
-- spacer
form.addSpacer(318,7);
-- sensor (MUI or MEZON)
form.addRow(2);
form.addLabel({label = locale.SetupFormSelectSensorLabel, width = 200});
form. addSelectbox(formSensors, formSensorsIndex, true, sensorChanged);
-- only for MEZON, we add the gearbox ratio
if (sensorMode == _MEZ) then
form.addRow(2);
form.addLabel({label = locale.SetupFormGearBoxValueLabel, width = 200});
form.addIntbox(revolutionsGearboxRatio, 100, 1000, 100, 0, 1, gearboxRatioChanged);
end
-- battery
form.addRow(2);
form.addLabel({label = locale.SetupFormSelectBatteryLabel, width = 200});
form.addIntbox(batteryCapacity, 0, 32000, 0, 0, 10, batteryChanged);
-- spacer
form.addSpacer(318,7);
-- gates
form.addRow(3);
form.addLabel({label = locale.SetupFormRedGateLabel, width = 150});
form.addIntbox(redGate, 0, 100, _REDGATE, 0, 1, redGateChanged);
form.addAudioFilebox(alarmRedGate, alarmRedGateChanged);
form.addRow(3);
form.addLabel({label = locale.SetupFormAmberGateLabel, width = 150});
form.addIntbox(amberGate, 0, 100, _AMBERGATE, 0, 1, amberGateChanged);
form.addAudioFilebox(alarmAmberGate, alarmAmberGateChanged);
form.addRow(3);
form.addLabel({label = locale.SetupFormBlueGateLabel, width = 150});
form.addIntbox(blueGate, 0, 100, _BLUEGATE, 0, 1, blueGateChanged);
form.addAudioFilebox(alarmBlueGate, alarmBlueGateChanged);
collectgarbage();
end

-- print Configuration form
local function printForm(formId)
end

My idea is that if sensorMode is Mezon, then the gearbox ratio parameter shows up, if not, this gearbox ratio is not used.

but I'm not able to make this field to disappear when sensorMode is not mezon.

Suggestions??

Thanks,

Please put the code inside code tags so it's more readable. (Remove spaces before the "]", or more simply, use the <> button in editors buttonline above)

There have been issues with this forums colors with code tag, I hope they will get it fixed sometime...

But an answer, you should look in reinit function and use some if-statements.

So here's your code:

With a quick look I don't see why that would not work with some adjustment. Where and when do you set the "sensorMode" to "_MEZ"? Have a look in LUA API for "form.reinit"

Ok, I solved it myself.

I'm not sure if this is the right solution, but it works.

In my case, the reason why I need the form to add a parameter when I use a MEZON sensor, to determine the gearbox setting.

Basically, in the setup form I want to be able to switch from



to



I have a variable, called sensorMode, that determines if the sensor is a MUI or a MEZON. If Mezon is active, there is a revolutions parameter that I need to determine and apply the gearbox reduction in order to obtain the actual propeller revolutions.

first, I added a local variable at the start of the lua code:

second, I slightly change the code in my setup form. so to skip the gearbox field if sensor mode is not MEZON...

now, as this code is present in the setupform function, it's only called once, when we setup the form.

So, I added some code also the the sensorChanged function (that is, the code associated to the change of sensors between MUI and MEZON).

this way I know what was the previous value of sensormode.

Lastly, I add a function to my code, and that is the printform

I change my definition of the setup of the form by adding the proper calls

and I complete the printform function.

this is called as the loop, every 22ms...

the important line is

this line basically respawns the initform code, so the form is effectively regenerated.

hope it helps

TeroS wrote: So here's your code:

--

With a quick look I don't see why that would not work with some adjustment. Where and when do you set the "sensorMode" to "_MEZ"? Have a look in LUA API for "form.reinit"

thanks, we arrived to the same conclusion!