[SOLVED] Lighter setup for serial port parameters (qSerialDevice)

[david.luggen]

Hey there

If I want to save the last serial port parameters to initialize this port at the next program start, I used always big switch statements like this one:

@switch(i)
{
case 0:
port->setParity(SerialPort::EvenParity);
break;
case 1:
port->setParity(SerialPort::OddParity);
break;
case 2:
port->setParity(SerialPort::NoParity);
break;
case 3:
port->setParity(SerialPort::MarkParity);
break;
case 4:
port->setParity(SerialPort::SpaceParity);
break;
}@

Is it possible to save these different serial port parameters into a QList or something similar, so I would be able to reduce all of this into one line? Something like this:

@QList<SerialPort> databits << SerialPort::Data5 << SerialPort::Data6 << SerialPort::Data7 << SerialPort::Data8;@

And then:

@port->setDataBits(databits[i]);@

Unfortunately it does not work with a QList, or I haven't found the right method to do this.

[tobias.hunger]

Assuming that SerialPort::EvenParity, etc. are actually enums: Why don't you just cast those to an int, save that into "serialPort/parityIndex" (which should be surrounded by QLatin1String(...) by the way) and then call port->setParity(SerialPort::WhatEverEnum(value)?

[tobias.hunger]

PS: Since the enum values are not of type SerialPort the QList<SerialPort> databits thing can not work. You need to use the type of the enum, not the class containing it there.

[david.luggen]

Thx for the advice. As you said my fault was the type of the QList. I just needed to set the type to:

@QListSerialPort::DataBits databits@

with the DataBits enum for example.

It is also possible to use the integer value. But in my application I use QComboBox to adjust the serialPort. Finally I save the index value of the QComboBox when the settings are applied. If I want to use these integers to set the serial port parameteres it gets a bit confusing because the enums have different values. For example:

@ enum Parity {
NoParity = 0,
EvenParity = 2,
OddParity = 3,
SpaceParity = 4,
MarkParity = 5,
UnknownParity = -1
};@

Therefore it's anyway useful to fill a QList in the order like you want it, isn't it?

[kuzulis]

2 luggi,

see examples in /tests/guiapp/optionsdialog.cpp