// Other methods
public NList Copy()
{
if (Length > 0)
{
NList tmp = new NList();
Node tmpCursor;
tmp.FrontN = (Node) FrontN.Clone();
tmp.Length = Length;
tmpCursor = tmp.FrontN;
while (tmpCursor != null)
{
if (tmpCursor.Next == null)
{
tmp.BackN = tmpCursor;
}
tmpCursor = tmpCursor.Next;
}
return tmp;
}
return new NList();
}
private void frmCourse_Load(object sender, EventArgs e)
{
txtID.Text = course.CourseID;
txtDesc.Text = course.Description;
cbxFall.Checked = course.Fall;
cbxWinter.Checked = course.Winter;
cbxSpring.Checked = course.Spring;
cbxSummer.Checked = course.Summer;
if (course.Prereqs != null && course.Prereqs.Length > 0)
{
NList iter = course.Prereqs;
for (iter.MoveFront(); iter.Index >= 0; iter.MoveNext())
{
lbxPre.Items.Add(iter);
}
}
else
{
lbxPre.Items.Add("None");
}
if (course.Coreqs != null && course.Coreqs.Length > 0)
{
NList iter = course.Coreqs;
for (iter.MoveFront(); iter.Index >= 0; iter.MoveNext())
{
lbxCo.Items.Add(iter);
}
}
else
{
lbxCo.Items.Add("None");
}
}
public Course(string id, string desc, byte units, bool f, bool w, bool s, bool u, NList p, NList c)
{
CourseID = id;
Description = desc;
Units = units;
Fall = f;
Winter = w;
Spring = s;
Summer = u;
Prereqs = p;
Coreqs = c;
}
private void cmdGo_Click(object sender, EventArgs e)
{
try
{
string id = GetString(txtCourseID);
string name = GetString(txtCourseName);
byte units = 0;
NList prereqs = new NList();
if (!Byte.TryParse(GetString(txtCourseUnits), out units))
{
units = 0;
}
foreach (object course in lbxPrereqs.Items)
{
prereqs.Append((Course)course);
}
Course cs = new Course(id,
name,
units,
cbxFall.Checked,
cbxWinter.Checked,
cbxSpring.Checked,
cbxSummer.Checked,
prereqs,
null);
mainDB.Add(id, cs);
mainDB.SaveDB();
mainDB.PopulateListBox(lbxCList);
}
catch (Exception ex)
{
MessageBox.Show(String.Format("Error creating course. {0}", ex.Message));
}
}
public bool Equals(Object o)
{
bool tmp = false;
if (o is NList)
{
NList L = (NList) o;
Node me = FrontN;
Node them = L.FrontN;
if ((tmp = Length == L.Length)) // Hidden assignment
{
while (tmp && me != null)
{
tmp = me.Data == them.Data;
me = me.Next;
them = them.Next;
}
}
}
return tmp;
}
private void AddCourse(Course course, CourseDB term, ListBox lbx)
{
NList iter = course.Prereqs.Copy();
AcademicYear ay;
Course cs;
bool found;
// Check previous years for prereqs
for (int i = 0; i < yearIndex; ++i)
{
ay = plan[i];
for (iter.MoveFront(); iter.Index >= 0; iter.MoveNext())
{
cs = (Course)iter.Get();
found = ay.Fall.ContainsKey(cs.CourseID) || ay.Winter.ContainsKey(cs.CourseID) || ay.Spring.ContainsKey(cs.CourseID) || ay.Summer.ContainsKey(cs.CourseID);
if (found)
{
iter.Delete();
}
}
}
ay = plan[yearIndex];
// Check current year for prereqs
for (iter.MoveFront(); iter.Index >= 0; iter.MoveNext())
{
cs = (Course)iter.Get();
if (term == ay.Winter)
{
found = ay.Fall.ContainsKey(cs.CourseID);
}
else if (term == ay.Spring)
{
found = ay.Winter.ContainsKey(cs.CourseID) || ay.Fall.ContainsKey(cs.CourseID);
}
else if (term == ay.Summer)
{
found = ay.Spring.ContainsKey(cs.CourseID) || ay.Winter.ContainsKey(cs.CourseID) || ay.Fall.ContainsKey(cs.CourseID);
}
else
{
found = false;
}
if (found)
{
iter.Delete();
}
}
// Only add the course if it's prerequisites have been satisfied
if (iter.Length < 1)
{
term.Add(course.CourseID, course);
ay.SaveYear();
term.PopulateListBox(lbx);
}
}