fga-eps-mds/2019.1-unbrake

package main

import (
    "github.com/getlantern/systray"
)

const checkedPrefix = "\u2713 "

// Represents the systray menu item of a serial port
// to be used
type serialPortGUI struct {
    item  *systray.MenuItem
    title string
}

// Controls the serial ports selection via GUI
func handlePortsSectionGUI() {
    systray.AddSeparator()
    portsTitle := systray.AddMenuItem("Portas", "Selecione a porta de leitura")
    portsTitle.Disable()

    // Get available ports
    portsNames := getSerialPorts()

    // Add environment variable serial port if not already exists
    found, userDefinedPort := false, getSerialPort()
    for i := range portsNames {
        if portsNames[i] == userDefinedPort {
            found = true
            break
        }
    }
    if !found && userDefinedPort != "" {
        portsNames = append(portsNames, userDefinedPort)
    }

    // Create ports
    ports := make([]serialPortGUI, len(portsNames))
    for i, portName := range portsNames {
        ports[i] = createPort(portName, "Select port")
    }

    systray.AddSeparator()

    handleSelect := func(selected int, ports []serialPortGUI) {
        if port.IsOpen() {
            port.Close()
        }
        for i := range ports {
            if i != selected {
                ports[i].uncheck()
            }
        }

        ports[selected].uncheck()
        serialPortNameCh <- ports[selected].title
        ports[selected].check()
    }

    // Handle serial ports checking/unchecking
    for i, port := range ports {
        go func(selected int, portLocal serialPortGUI) {
            for {
                <-portLocal.item.ClickedCh
                handleSelect(selected, ports)
            }
        }(i, port)
    }
}

// Creates a Serial on systray
func createPort(title, tooltip string) serialPortGUI {
    var port serialPortGUI

    port.title = title
    port.item = systray.AddMenuItem(title, tooltip)

    return port
}

// Set the title of a serial on GUI
func (port *serialPortGUI) setTitle(title string) {
    port.title = title
    port.item.SetTitle(title)
}

// Check port menu item based on current state
func (port *serialPortGUI) check() {
    if !port.item.Checked() {
        port.setTitle(checkedPrefix + port.title)
        port.item.Check()
    }
}

// Uncheck port menu item based on current state
func (port *serialPortGUI) uncheck() {
    if port.item.Checked() {
        port.setTitle(port.title[len(checkedPrefix):])

        port.item.Uncheck()
    }
}