/// <summary>
/// Description: Executed when the save changes button is pressed
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void saveChangesBtn_Click(object sender, EventArgs e)
{
// If there are no items in the list box, function ends
if (itemListBox.Items.Count == 0) return;
// Creates ints pastItemCount and index, as number of items in list box and selected index
int pastItemCount = itemListBox.Items.Count;
int index = itemListBox.SelectedIndex;
// Creates variables for new attributes of item
string newType = (string)infoTypeComboBox.SelectedItem;
string title = currTitleTxt.Text;
double cost;
string genre = infoGenreComboBox.Text;
string platform = infoPlatformComboBox.Text;
int releaseYear;
// Attempts to convert user input
// If TryParse fails, message box is shown with error
if (!Double.TryParse(currCostTxt.Text, out cost))
{
MessageBox.Show("ERROR: Invalid cost.");
return;
}
if (!Int32.TryParse(currReleasedTxt.Text, out releaseYear))
{
MessageBox.Show("ERROR: Invalid release year.");
return;
}
// Switch statement for each type of item
switch (newType)
{
case "Movie":
{
// Creates variables for type specific attributes
string director = currTypeSpecific1Txt.Text;
int duration;
// Attempts to convert duration input to integer
// If it fails, shows message box with error
if (!Int32.TryParse(currTypeSpecific2Txt.Text, out duration))
{
MessageBox.Show("ERROR: Invalid duration. (Please use whole minutes.)");
return;
}
// If filter is active, change is made to item at filtered index
// Otherwise, change is made to item at selected index
if (filterActive) inventory.items[filteredIndex[index]] = new Movie(newType, title, cost, genre, platform, releaseYear, director, duration);
else inventory.items[index] = new Movie(newType, title, cost, genre, platform, releaseYear, director, duration);
break;
}
case "Game":
{
string developer = currTypeSpecific1Txt.Text;
double ignScore;
if (!Double.TryParse(currTypeSpecific2Txt.Text, out ignScore))
{
MessageBox.Show("ERROR: Invalid IGN score. (IGN scores are single digit decimals from 0 to 10.");
return;
}
if (filterActive) inventory.items[filteredIndex[index]] = new Game(newType, title, cost, genre, platform, releaseYear, developer, ignScore);
else inventory.items[index] = new Game(newType, title, cost, genre, platform, releaseYear, developer, ignScore);
break;
}
case "Book":
{
string author = currTypeSpecific1Txt.Text;
string publisher = currTypeSpecific2Txt.Text;
if (filterActive) inventory.items[filteredIndex[index]] = new Book(newType, title, cost, genre, platform, releaseYear, author, publisher);
else inventory.items[index] = new Book(newType, title, cost, genre, platform, releaseYear, author, publisher);
break;
}
}
// Updates possible platforms and genres for item type
inventory.UpdatePlatforms(newType, platform);
inventory.UpdateGenres(newType, genre);
// Changes item in list box according to changes
itemListBox.Items[index] = inventory.items[index].Display();
// If filter is active, filter is updated
if (filterActive)
{
UpdateFilter();
// If number of items in list box has not changed, index stays the same
// Otherwise, if items still exist in list box, index is decremented
if (pastItemCount == itemListBox.Items.Count) itemListBox.SelectedIndex = index;
else if (itemListBox.Items.Count > 0) itemListBox.SelectedIndex = index - 1;
}
}