private void btnPop_Click(object sender, EventArgs e)
{
CDNode removeNode = JBSP1.pop();
if (removeNode != null)
{
lblOutput.Text = " Removed " + removeNode.Name;
}
else
{
lblOutput.Text = "No CD's on Spindle to remove";
}
}
private void btnPeek_Click(object sender, EventArgs e)
{
CDNode peekNode = JBSP1.peek();
if (peekNode != null)
{
lblOutput.Text = peekNode.Name + " is at the top of the spindle";
}
else
{
lblOutput.Text = "Peek not possible, no CD's on the Spindle";
}
}
}//peek
public CDNode pop()
{
if (isEmpty())
{
return(null);
}
else
{
CDNode removed = top; //creating a reference called removed
top = removed.Prev; //top should now be removed previous
size--;
return(removed);
}//pop
}
}//isEmpty
public Boolean push(CDNode newNode)
{
if (size >= capacity)
{
return(false);
}
else
{
newNode.Prev = top;
top = newNode;
size++;
return(true);
}
}//push
}//push
public string list()
{
if (isEmpty())
{
return("Spindle is empty\n");
}
string output = "Contents of Stack\nCD's: " + size + "\n";
CDNode current = top;
while (current != null)
{
output += current.Name + " By " + current.Artist + " || No. of tracks: " + current.getTracks() + " || runtime in mins: " + current.getDuration() + "\n";
current = current.Prev;
}
return(output);
}//list
public bool contains(string find)
{
if (isEmpty())
{
return(false);
}
CDNode current = top;
while (current != null)
{
if (find == current.Name)
{
current.getTracks();
current.getDuration();
return(true);
}
current = current.Prev;
}
return(false);
}//contains
private void btnPush_Click(object sender, EventArgs e)
{
CDNode newCD = new CDNode();
if (txtName.Text == "" || txtArtist.Text == "" || txtTracks.Text == "" || txtDuration.Text == "")
{
lblOutput.Text = "All fields need to be filled before a new CD can be added";
return;
}
newCD.Name = txtName.Text;
newCD.Artist = txtArtist.Text;
if (JBSP1.push(newCD))
{
lblOutput.Text = "CD was sucesfully added";
}
else
{
lblOutput.Text = "CD could not be added, spindle is full";
}
try
{
newCD.setTracks(Convert.ToInt32(txtTracks.Text));
newCD.setDuration(Convert.ToInt32(txtDuration.Text));
}
catch (FormatException fex)
{
lblOutput.Text = "Error Occured, Tracks and Duration need to be a number!";
string err = "\n" + fex.Message + DateTime.Now.ToString();
File.AppendAllText(@"..\..\ErrorLog.txt", "\n" + err);
}
}
private void btnRemoveCD_Click(object sender, EventArgs e)
{
try
{
int toBeRemoved = (Convert.ToInt32(txtRemove.Text));
for (int i = 0; i < toBeRemoved - 1; i++)
{
CDNode nextSpindle = JBSP1.pop();
JBSP2.push(nextSpindle);
}
JBSP1.pop();
lblOutput.Text = "The CD at position:" + txtRemove.Text + " was Succesfully removed, view the spindle again to view the changes!";
}
catch (FormatException fx)
{
lblOutput.Text = "Error Occured, Enter a number which indicates the position of the CD you wish to remove";
string err = "\n" + fx.Message + DateTime.Now.ToString();
File.AppendAllText(@"..\..\ErrorLog.txt", "\n" + err);
}
catch (NullReferenceException nrx)
{
lblOutput.Text = "Error, enter a position which is possible to remove";
string err = "\n" + nrx.Message + DateTime.Now.ToString();
File.AppendAllText(@"..\..\ErrorLog.txt", "\n" + err);
}
while (JBSP2.peek() != null)
{
CDNode nextSpindle = JBSP2.pop();
JBSP1.push(nextSpindle);
}
}
public Spindle()
{
top = null;
size = 0;
capacity = 10;
}