/// <summary>
/// This method handles the case where the user decides to close the
/// currently active spreadsheet by clicking the X icon on top-right.
/// When prompted to save the sheet (if it is unsaved), if the user clicks
/// cancel, exists. If the user clicks Yes, saves the file. And if the user
/// clicks Cancel, the program remains open.
/// </summary>
/// <param name="e">Provides the Form closing event arguments</param>
private void HandleXClose(FormClosingEventArgs e)
{
if (spreadsheet.Changed && !closedFromMenu)
{
DialogResult result = window.Message("There are some unsaved changes."
+ " Would you like to save your changes before closing?",
"Save Before Exiting?", MessageBoxButtons.YesNoCancel,
MessageBoxIcon.Warning);
// if seleced 'Yes', then save the file. If the change is still true
// (i.e, user selected cancel in the Save dialog), don't close the sheet.
if (result == DialogResult.Yes)
{
window.PerformSaveClick();
if (spreadsheet.Changed)
{
e.Cancel = true;
}
}
// else if selected cancel, don't close the window. Else, let the sheet
// window close.
else if (result == DialogResult.Cancel)
{
e.Cancel = true;
}
}
}