private void MiChannelSettingsClick(object sender, EventArgs e)
{
// prevent opening multiple dialogs at the same time
EnableContextMenuDialogs(false);
// disable timers
retrieveTimer.Stop();
dispTimer.Stop();
// cancel potential background worker operation
retriever.backgroundWorker.CancelAsync();
// show the settings form
FormChannelSettings formChannelSettings =
new FormChannelSettings(null);
DialogResult result = formChannelSettings.ShowDialog();
// we must renable the menu items before UpdateIcon()
EnableContextMenuDialogs(true);
if (result == DialogResult.OK)
{
// restore icon properties
UpdateIcon();
// setup new rss list
// since we modified the channel settings file, there must not be an exception
retriever.InitializeChannels();
}
// start background worker thread to retrieve channels
if (!isPaused)
{
// we might get a race condition here, if the worker thread is still not cancelled!
if (retriever.backgroundWorker.IsBusy == false)
{
// worker already finished, everything fine
retriever.backgroundWorker.RunWorkerAsync();
}
else
{
// work still pending, we cannot restart right now
// in this case, we start the retriever timer and
// hope that the worker is finished before the timer expires!
retrieveTimer.Start();
}
}
}
// constructor of main form
public FormMain()
{
// setup GUI
InitializeComponent();
// setup display timer
dispTimer = new Timer();
dispTimer.Tick += new EventHandler(OnDispTimerTick);
dispTimer.Enabled = false;
dispTimer.Interval = Settings.Default.displayIntervall * 60 * 1000; // intervall in min
// setup retrieve timer
retrieveTimer = new Timer();
retrieveTimer.Tick += new EventHandler(OnRetrieverTimerTick);
retrieveTimer.Enabled = false;
retrieveTimer.Interval = Settings.Default.retrieveIntervall * 60 * 1000; // intervall in min
// setup single click timer
doubleClickTimer = new Timer();
doubleClickTimer.Tick += new EventHandler(OnDoubleClickTimerTick);
doubleClickTimer.Enabled = false;
doubleClickTimer.Interval = SystemInformation.DoubleClickTime / 2;
// setup and start the background worker
retriever = new Retriever();
retriever.backgroundWorker.RunWorkerCompleted +=
new System.ComponentModel.RunWorkerCompletedEventHandler(this.RetrieveCompleted);
retriever.backgroundWorker.ProgressChanged +=
new System.ComponentModel.ProgressChangedEventHandler(this.RetrieverProgressError);
// set initial status
isPaused = Settings.Default.startPaused;
// set icon and tooltip text
UpdateIcon();
// read channel settings
bool firstStart = retriever.InitializeChannels();
if (firstStart)
{
// display welcome message
applicationIcon.ShowBalloonTip(
Settings.Default.balloonTimespan * 1000,
Resources.str_balloonWelcomeHeader,
Resources.str_balloonWelcomeBody,
ToolTipIcon.Info);
}
// check command line args to potentially subscribe to a feed
foreach (string cmdLineArg in Environment.GetCommandLineArgs())
{
if (Uri.IsWellFormedUriString(cmdLineArg, UriKind.Absolute))
{
// show the settings form
FormChannelSettings formChannelSettings =
new FormChannelSettings(cmdLineArg);
formChannelSettings.ShowDialog();
// fixme: we can only add a single channel
break;
}
}
// load initial channels in background task
if (!isPaused)
{
retriever.backgroundWorker.RunWorkerAsync();
}
}