/*!
* \brief Remove the selected ticket (if any) from the lottery.
*
* If no ticket is selected, the function does nothing besides showing an error message.
* If removing the selected ticket leaves the list empty, the add-comment button
* and delete-ticket button are disabled.
*/
private void BtnRemoveTicket_Click(object sender, RoutedEventArgs e)
{
if (!HasTicketSelected())
{
return;
}
var ticket = (Ticket)LwTickets.SelectedItem;
if (WndDialogMessage.Show(this, "Do you want to delete this ticket?\n\nLottery number: " + ticket.LotteryNumber, "Confirm Delete", MessageBoxButton.YesNo, MessageBoxImage.Warning) != MessageBoxResult.Yes)
{
return;
}
CurrentLottery.RemoveTicket(ticket);
LwTickets.Items.Remove(ticket);
var oldPrice = int.Parse(TxtPrize.Text);
TxtPrize.Text = "" + (oldPrice - ticket.Price);
if (LwTickets.Items.Count < 1)
{
BtnAddComment.IsEnabled = false;
BtnRemoveTicket.IsEnabled = false;
}
}
/*!
* \brief Test if end-user has selected a lottery number in the list of tickets.
*
* If no selection is active an appropriate error message is shown.
*
* \return true if there is an item selected, and false if not.
*/
private bool HasTicketSelected()
{
if (LwTickets.SelectedItem != null)
{
return(true);
}
WndDialogMessage.Show(this, "No lottery number selected.", "Missing selection", MessageBoxButton.OK, MessageBoxImage.Error);
return(false);
}
/*!
* \brief Show a dialog message with no icon, a window caption and an OK button.
*
* \param owner The owner of the window on which the dialog will be centered.
* \param message The message to be shown in the dialog window.
* \param caption The title that is displayed in the window's frame.
*
* \return The corresponding button that was pressed, or MessageBoxResult.None
* if the window was closed without pushing a button.
*/
public static MessageBoxResult Show(Window owner, string message, string caption)
{
var dialog = new WndDialogMessage()
{
Owner = owner, Title = caption ?? ""
};
dialog.SetMessage(message);
dialog.ShowDialog();
return(dialog.Result);
}
/*!
* \brief Show a dialog message with a given icon, a window caption and a given set of buttons.
*
* \param owner The owner of the window on which the dialog will be centered.
* \param message The message to be shown in the dialog window.
* \param caption The title that is displayed in the window's frame.
* \param buttons The button configuration of the dialog window.
* \param icon The image icon that should be displayed in the dialog window.
*
* \return The corresponding button that was pressed, or MessageBoxResult.None
* if the window was closed without pushing a button.
*/
public static MessageBoxResult Show(Window owner, string message, string caption, MessageBoxButton buttons, MessageBoxImage icon)
{
var dialog = new WndDialogMessage()
{
Owner = owner, Title = caption ?? ""
};
dialog.SetMessage(message);
dialog.SetButtons(buttons);
dialog.SetIconImage(icon);
dialog.ShowDialog();
return(dialog.Result);
}
/*!
* \brief Asks the end-user if the lottery "should be saved before closing".
* \return true if the end-user canceled the dialog; false otherwise, regadless if the
* end-user chose to save or not.
*/
private bool PromptSaveOnClose()
{
var result = WndDialogMessage.Show(this, "Save before closing?", "Closing Lottery", MessageBoxButton.YesNoCancel, MessageBoxImage.Question);
if (result == MessageBoxResult.Yes)
{
SaveToFile();
}
else if (result == MessageBoxResult.Cancel)
{
return(true);
}
return(false);
}
/*!
* \brief Check if a load-file name is stored and parse it if so.
*
* This function, run upon the welcome window being loaded, checks the
* application's dynamic memory for a filename on a lottery save file
* the application was started with (e.g. by double-clicking a save file).
*
* If such a file is found, it is parsed and the application shows the main
* lottery window, assuming no parse error occured.
*/
private void WelcomeWindow_Loaded(object sender, RoutedEventArgs e)
{
if (!SkipUpdateCheck)
{
CheckForUpdates();
if (UpdateProcess != null && UpdateProcess.UpdateAvailable && !UpdateWasCancelled)
{
// Close the application since the update installer has been opened.
Close();
return;
}
}
if (Application.Current.Properties["LoadfileName"] == null)
{
return;
}
var filename = Application.Current.Properties["LoadfileName"].ToString();
Lottery importedLottery;
try {
Stream filestream = new FileStream(filename, FileMode.Open);
importedLottery = InitiateImport(filestream);
}
catch (Exception ex) {
WndDialogMessage.Show(this, "An unexpected error occured during loading of the save file:\n" + ex.Message,
"Unexpected Error", MessageBoxButton.OK, MessageBoxImage.Error);
return;
}
if (importedLottery == null)
{
return;
}
var mainWindow = new WndMain(true, filename)
{
Owner = this, LotteryModel = importedLottery
};
mainWindow.Show();
mainWindow.Owner = null;
Close();
}
//! Open a new window for adding new tickets to the lottery.
private void BtnSellTickets_Click(object sender, RoutedEventArgs e)
{
if (LotteryModel.NumLotteryNumbersLeft < 1)
{
WndDialogMessage.Show(this, "There are no more tickets to sell.", "Sold Out", MessageBoxButton.OK,
MessageBoxImage.Information);
return;
}
var newTicketsWindow = new WndNewTickets(LotteryModel)
{
Owner = this
};
IgnoreSaveOnClosing = false;
this.IsEnabled = false;
newTicketsWindow.ShowDialog();
ProcessAutoSave();
}
//! Prompt the end-user to remove the selected ticket (if any) from the list of sold tickets.
private void MenuItemRemoveWinner_Click(object sender, RoutedEventArgs e)
{
var selectedTicket = (Ticket)LwTickets.SelectedItem;
if (selectedTicket == null)
{
return;
}
const string msg = "Do you want to remove the sold ticket?\nDoing so will make the number puchasable again.";
if (WndDialogMessage.Show(this, msg, "Confirm Removal", MessageBoxButton.YesNo, MessageBoxImage.Warning) != MessageBoxResult.Yes)
{
return;
}
LotteryModel.RemoveTicket(selectedTicket);
LwTickets.Items.Remove(selectedTicket);
((WndMain)Owner).IgnoreSaveOnClosing = false;
}
//! Prompt the end-user to remove the selected (if any) ticket from the list of winners.
private void MenuItemRemoveWinner_Click(object sender, RoutedEventArgs e)
{
var selectedTicket = (Ticket)LwWinningTickets.SelectedItem;
if (selectedTicket == null)
{
return;
}
const string msg = "Do you want to remove the selected ticket from the pool of winners?\n\nThis DOES NOT delete the ticket.";
if (WndDialogMessage.Show(this, msg, "Confirm Removal", MessageBoxButton.YesNo, MessageBoxImage.Warning) != MessageBoxResult.Yes)
{
return;
}
LotteryModel.RemoveWinningTicket(selectedTicket.LotteryNumber);
LwWinningTickets.Items.Remove(selectedTicket);
IgnoreSaveOnClosing = false;
ProcessAutoSave();
}
/*!
* \brief Initate importing a lottery save file into the application.
*
* NOTE that this function DOES NOT close the file's stream.
*
* \param filestream Open read-stream to the save file.
*/
private Lottery InitiateImport(Stream filestream)
{
string errorMsg;
Lottery importedLottery;
var importResult = Lottery.ImportFromFile(filestream, out importedLottery, out errorMsg);
filestream.Close();
switch (importResult)
{
case Lottery.ImportResult.InvalidFile:
WndDialogMessage.Show(this, "The import file is not a valid vplf file.", "Import Failed",
MessageBoxButton.OK, MessageBoxImage.Error);
return(null);
case Lottery.ImportResult.ParseError:
WndDialogMessage.Show(this, "Import of lottery file failed with error:\n" + errorMsg, "Import Failed",
MessageBoxButton.OK, MessageBoxImage.Error);
return(null);
}
return(importedLottery);
}
/*!
* \brief Draw a winning number and add the ticket to the list of winning tickets.
*
* If no tickets have yet be sold a message box informs the end-user of this and returns
* without further action. Equally it shows a message and returns without further action if
* all sold tickets have already won.
*/
private void BtnDrawWinner_Click(object sender, RoutedEventArgs e)
{
if (LotteryModel.Tickets.Count < 1)
{
WndDialogMessage.Show(this, "No tickets have yet been sold.\nNo winner is drawn.", "No Tickets Sold", MessageBoxButton.OK,
MessageBoxImage.Information);
return;
}
var winner = LotteryModel.DrawWinningNumber();
if (winner == null)
{
WndDialogMessage.Show(this, "All solds tickets have already won.\nNo winner is drawn.", "All Tickets Won", MessageBoxButton.OK,
MessageBoxImage.Information);
return;
}
LwWinningTickets.Items.Add(winner);
IgnoreSaveOnClosing = false;
ProcessAutoSave();
}
//! Check for updates, prompting the end-user to download and install if found.
private void CheckForUpdates()
{
UpdateProcess = ApplicationUpdate.CheckForUpdate();
if (UpdateProcess == null)
{
const string msg = "Velvet Pearl Lottery could not check for updates.\n\nThis may be caused by a lack of internet connection or Enjin being down for maintenance. " +
"If the problem persists, contact denDAY at \nwww.enjin.com/profile/493549.";
WndDialogMessage.Show(this, msg, "Update Check Failed", MessageBoxButton.OK, MessageBoxImage.Warning);
return;
}
else if (!UpdateProcess.UpdateAvailable)
{
return;
}
var choice = WndDialogMessage.Show(this, "A new update is available.\n\nDownload and install?", "New Update", MessageBoxButton.YesNo, MessageBoxImage.Question);
if (choice != MessageBoxResult.Yes)
{
return;
}
// Download and register the install function (event handler) and cancel token.
if (!UpdateProcess.DownloadUpdateAsync(InstallUpdate))
{
return;
}
var cancelToken = new CancellationTokenSource();
cancelToken.Token.Register(CancelUpdate);
UpdateStatusWnd = new WndUpdateStatus(cancelToken)
{
StatusText = "Downloading update ...", Owner = this
};
UpdateStatusWnd.ShowDialog();
}
//! Attempt to add a new ticket, either with a random or specific lottery number.
private void BtnAddTicket_Click(object sender, RoutedEventArgs e)
{
int actualLotteryNumber;
if (BuyRandomLotteryNumber)
{
actualLotteryNumber = CurrentLottery.BuyLotteryNumber(TxtOwner.Text);
// Makes sure that there was a ticket left to buy.
if (actualLotteryNumber == Lottery.InvalidLotteryNumber)
{
WndDialogMessage.Show(this, "No more tickets available.", "No tickets left", MessageBoxButton.OK,
MessageBoxImage.Information);
return;
}
}
else
{
if (string.IsNullOrEmpty(TxtSpecificLotteryNumber.Text))
{
WndDialogMessage.Show(this, "No lottery number given.\nIf you want a random one, check the random box.",
"Missing Number", MessageBoxButton.OK, MessageBoxImage.Information);
return;
}
var userLotteryNumber = int.Parse(TxtSpecificLotteryNumber.Text);
var result = CurrentLottery.BuyLotteryNumber(userLotteryNumber, TxtOwner.Text);
switch (result)
{
case LotteryNumberSaleResult.Success:
actualLotteryNumber = userLotteryNumber;
break;
case LotteryNumberSaleResult.NumberAlreadySold:
WndDialogMessage.Show(this, "The number has already been sold.", "Number Unavailable",
MessageBoxButton.OK, MessageBoxImage.Information);
return;
case LotteryNumberSaleResult.NumberOutOfRange:
var msg = "The number is not in the alllowed range: " + Lottery.LotteryNumberMin + " - " +
CurrentLottery.LotteryNumberMax + ".";
WndDialogMessage.Show(this, msg, "Invalid Number", MessageBoxButton.OK, MessageBoxImage.Information);
return;
default:
WndDialogMessage.Show(this, "An unspecified error occured.", "Unspecified Error", MessageBoxButton.OK, MessageBoxImage.Error);
return;
}
}
// Add to list and update the tottal price.
var ticket = CurrentLottery.Tickets.Find(T => T.LotteryNumber == actualLotteryNumber);
LwTickets.Items.Add(ticket);
LwTickets.ScrollIntoView(ticket);
var oldPrice = int.Parse(TxtPrize.Text);
TxtPrize.Text = "" + (oldPrice + ticket.Price);
// Enabled the buttons for the list of tickets.
BtnAddComment.IsEnabled = true;
BtnRemoveTicket.IsEnabled = true;
}