private void btnPop_Click(object sender, EventArgs e)
{
if (!sp1.isEmpty())
{
CDNode removeCD = sp1.pop();
if (removeCD != null)
{
lblOutput.Text = removeCD.Artist + " - " + removeCD.AlbumTitle + " has been removed from the spindle";
int remove = lstRemoveSpecificCD.TopIndex;
lstRemoveSpecificCD.Items.RemoveAt(remove);
}
else
{
lblOutput.Text = "There are no CDs on the spindle";
string error = DateTime.Now + " - There are no CDs on the spindle" + Environment.NewLine;
File.AppendAllText(@"..\..\ErrorLog.txt", error);
}
}
else
{
lblOutput.Text = "There are no CDs on the spindle";
string error = DateTime.Now + " - There are no CDs on the spindle" + Environment.NewLine;
File.AppendAllText(@"..\..\ErrorLog.txt", error);
}
}
private void btnPeekSpindle_Click(object sender, EventArgs e)
{
hidePanels();
pnlPeekSpindle.Show();
clearOutput();
clearTextfields();
if (!sp1.isEmpty())
{
CDNode peekCD = sp1.peek();
if (peekCD != null)
{
lblPeek.Text = "Artist: " + peekCD.Artist + " - Album: " + peekCD.AlbumTitle + " - No. of Tracks: " + peekCD.NoOfTracks + " - Duration: " + peekCD.Duration;
}
else
{
lblPeek.Text = "There are no CDs on the spindle";
string error = DateTime.Now + " - There are no CDs on the spindle" + Environment.NewLine;
File.AppendAllText(@"..\..\ErrorLog.txt", error);
}
}
else
{
lblPeek.Text = "There are no CDs on the spindle";
string error = DateTime.Now + " - There are no CDs on the spindle" + Environment.NewLine;
File.AppendAllText(@"..\..\ErrorLog.txt", error);
}
}
}//push
public CDNode pop()
{
if (isEmpty())
{
return(null);
}
CDNode removed = top;
top = removed.Prev;
size--;
return(removed);
}//pop
}//list
public String listAlbumArtist()
{
if (isEmpty())
{
return(" ");
}
string output = "";
CDNode current = top;
while (current != null)
{
output += current.Artist + " - " + current.AlbumTitle + "\n";
current = current.Prev;
}
return(output);
}//listAlbumArtist
}//peek
public String list()
{
if (isEmpty())
{
return("Spindle is empty");
}
string output = "Contents of Spindle\nCDs: " + size + "\n";
CDNode current = top;
while (current != null)
{
output += "Artist: " + current.Artist + " - Album: " + current.AlbumTitle + " - No. of Tracks: " + current.NoOfTracks + " - Duration: " + current.Duration + "\n";
current = current.Prev;
}
return(output);
}//list
}//count
public bool contains(String find)
{
if (isEmpty())
{
return(false);
}
CDNode current = top;
while (current != null)
{
if (find == current.Artist)
{
return(true);
}
current = current.Prev;
}
return(false);
}//contains
}//contains
public bool play(String artist, int track)
{
if (isEmpty())
{
return(false);
}
CDNode current = top;
while (current != null)
{
if (artist == current.Artist && track <= current.NoOfTracks)
{
return(true);
}
current = current.Prev;
}
return(false);
}//play
private void btnPush_Click(object sender, EventArgs e)
{
CDNode newCD = new CDNode();
if (sp1.getSize() < sp1.getCapacity())
{
if (newCD != null && txtAddArtist.Text != "" && txtAddAlbum.Text != "" && txtAddNoOfTracks.Text != "" && txtAddDuration.Text != "")
{
try
{
if (Convert.ToDouble(txtAddDuration.Text) > 0 && Convert.ToInt32(txtAddNoOfTracks.Text) > 0)
{
try
{
newCD.Artist = txtAddArtist.Text;
newCD.AlbumTitle = txtAddAlbum.Text;
try
{
newCD.Duration = Convert.ToDouble(txtAddDuration.Text);
try
{
newCD.NoOfTracks = Convert.ToInt32(txtAddNoOfTracks.Text);
try
{
sp1.push(newCD);
lstRemoveSpecificCD.Items.Insert(0, newCD.Artist + " - " + newCD.AlbumTitle);
lblOutput.Text = newCD.Artist + " - " + newCD.AlbumTitle + " has been added to the spindle";
clearTextfields();
}
catch
{
lblOutput.Text = "Unable to add CD to spindle, make sure to enter details into the text fields";
string error = DateTime.Now + " - Unable to add CD to spindle, make sure to enter details into the text fields" + Environment.NewLine;
File.AppendAllText(@"..\..\ErrorLog.txt", error);
}
}
catch (FormatException fex)
{
MessageBox.Show("Error: Please enter a valid number for number of tracks");
string error = DateTime.Now + " - " + fex.Message + Environment.NewLine;
File.AppendAllText(@"..\..\ErrorLog.txt", error);
}
}
catch (FormatException fex)
{
MessageBox.Show("Error: Please enter a valid format for duration in minutes");
string error = DateTime.Now + " - " + fex.Message + Environment.NewLine;
File.AppendAllText(@"..\..\ErrorLog.txt", error);
}
}
catch (Exception ex)
{
MessageBox.Show("Error: \n" + ex.Message);
string error = DateTime.Now + " - " + ex.Message + Environment.NewLine;
File.AppendAllText(@"..\..\ErrorLog.txt", error);
}
}
else
{
lblOutput.Text = "Make sure to to use a number greater than 0 for duration and number of tracks";
string error = DateTime.Now + " - Make sure to to use a number greater than 0 for duration and number of tracks" + Environment.NewLine;
File.AppendAllText(@"..\..\ErrorLog.txt", error);
}
}
catch (FormatException fex)
{
MessageBox.Show("Error: Please enter a valid format for duration and number of tracks");
string error = DateTime.Now + " - " + fex.Message + Environment.NewLine;
File.AppendAllText(@"..\..\ErrorLog.txt", error);
}
}
else
{
lblOutput.Text = "Unable to add CD to the spindle, make sure to enter details into the text fields";
string error = DateTime.Now + " - Unable to add CD to the spindle, make sure to enter details into the text fields" + Environment.NewLine;
File.AppendAllText(@"..\..\ErrorLog.txt", error);
}
}
else
{
lblOutput.Text = "The spindle is full, unable to add any more CDs";
string error = DateTime.Now + " - The spindle is full, unable to add any more CDs" + Environment.NewLine;
File.AppendAllText(@"..\..\ErrorLog.txt", error);
}
}
private void btnRemoveSpecific_Click(object sender, EventArgs e)
{
if (!sp1.isEmpty())
{
if (lstRemoveSpecificCD.SelectedIndex != -1)
{
int count = 0;
try
{
int cd = Convert.ToInt32(lstRemoveSpecificCD.SelectedIndex + 1);
if (sp1.count() != 0 && cd <= sp1.count())
{
for (int i = 0; i < cd - 1; i++)
{
CDNode popped = sp1.pop();
sp2.push(popped);
count++;
}
sp1.pop();
for (int x = 0; x < count; x++)
{
CDNode popped = sp2.pop();
sp1.push(popped);
}
lblOutput.Text = lstRemoveSpecificCD.SelectedItem + " has been removed from the spindle";
lstRemoveSpecificCD.Items.Remove(lstRemoveSpecificCD.SelectedItem);
clearTextfields();
}
else
{
lblOutput.Text = "This CD is not on the spindle to be removed";
string error = DateTime.Now + " - This CD is not on the spindle to be removed" + Environment.NewLine;
File.AppendAllText(@"..\..\ErrorLog.txt", error);
}
}
catch (FormatException fex)
{
MessageBox.Show("Error: Please enter a number less than or equal to the total number of CDs on the spindle");
string error = DateTime.Now + " - " + fex.Message + Environment.NewLine;
File.AppendAllText(@"..\..\ErrorLog.txt", error);
}
catch (Exception ex)
{
MessageBox.Show("Error: \n" + ex.Message);
string error = DateTime.Now + " - " + ex.Message + Environment.NewLine;
File.AppendAllText(@"..\..\ErrorLog.txt", error);
}
}
else
{
lblOutput.Text = "Please select an item from the listbox to remove";
string error = DateTime.Now + " - Please select an item from the listbox to remove" + Environment.NewLine;
File.AppendAllText(@"..\..\ErrorLog.txt", error);
}
}
else
{
lblOutput.Text = "There are no CDs on the spindle";
string error = DateTime.Now + " - There are no CDs on the spindle" + Environment.NewLine;
File.AppendAllText(@"..\..\ErrorLog.txt", error);
}
}
}//isEmpty
public void push(CDNode cd)
{
cd.Prev = top;
top = cd;
size++;
}//push
public Spindle()
{
top = null;
size = 0;
capacity = 10;
}
