/// <summary>
/// Compare which PrimeResult object has a number greater than the other.
/// </summary>
/// <param name="obj">The object we are going to compare to</param>
/// <returns>1 if this object has a number greater than the one we are comparing to, -1 otherwise</returns>
public int CompareTo(object obj)
{
PrimeResult result = (PrimeResult)obj;
if (this.Number > result.Number)
{
return(1);
}
if (this.Number < result.Number)
{
return(-1);
}
return(0);
}
/// <summary>
/// Removes the composite elements from the list view.
/// </summary>
/// <param name="sender">The object that triggered the event handler</param>
/// <param name="e">The event information</param>
private void Button_RemoveComposites_Click(object sender, EventArgs e)
{
foreach (ListViewItem item in listView_PrimeCheckResults.Items) //Loop through each item in the list view.
{
PrimeResult result = (PrimeResult)item.Tag;
if (!result.IsPrime) //Remove the element if it is not prime.
{
item.Remove();
}
}
DetermineExportStatus(); //Update display elements
UpdateStatistics();
}
/// <summary>
/// Removes all prime numbers from the list view.
/// </summary>
/// <param name="sender">The object that triggered the event handler</param>
/// <param name="e">The event information</param>
private void Button_RemovePrimes_Click(object sender, EventArgs e)
{
foreach (ListViewItem item in listView_PrimeCheckResults.Items) //Check all the items in the list view
{
PrimeResult result = (PrimeResult)item.Tag; //Tag allows us to associate an object with a list view item.
if (result.IsPrime) //Remove the item if it is prime.
{
item.Remove();
}
}
DetermineExportStatus(); //We have to update our GUI elements each time we remove or add elements.
UpdateStatistics();
}
/// <summary>
/// Calls our IsPrime method in the BigIntPrimeChecker class and displays the result in the listView control
/// </summary>
/// <param name="num"></param>
public void CheckNumAndDisplayResult(BigInteger num)
{
if (listView_PrimeCheckResults.Items.Count > 0)
{
foreach (ListViewItem item in listView_PrimeCheckResults.Items)
{
item.Focused = false;
item.Selected = false;
}
}
Boolean isPrime = BigIntPrimeChecker.isPrime(num); //Calling our prime checker method located in the prime checker I created in a previous assignment.
PrimeResult result = new PrimeResult(num, isPrime); //The prime result object stores a number, and whether or not the number is prime.
listView_PrimeCheckResults.Items.Add(result.ToString()); //Add the result to the list.
listView_PrimeCheckResults.Items[listView_PrimeCheckResults.Items.Count - 1].Tag = result; //Causes the item added in the previous statement to associate with an object (.Tag).
if (result.ToString().Length > 30) //If the number is too large, we shrink the text size. This could be improved in the future.
{
listView_PrimeCheckResults.Items[listView_PrimeCheckResults.Items.Count - 1].Font = new Font("Veranda", 8); //Give the list view entry a new font.
}
if (isPrime)
{
listView_PrimeCheckResults.Items[listView_PrimeCheckResults.Items.Count - 1].BackColor = Color.Green;
} //Green backround color if the listView entry is prime.
else
{
listView_PrimeCheckResults.Items[listView_PrimeCheckResults.Items.Count - 1].BackColor = Color.Red;
} //Red backround color if the number is composite.
textBox_NumberToCheck.Text = ""; //Clear the text box.
textBox_NumberToCheck.Select(); //Automatically selects the text box to allow the user to enter a new number.
listView_PrimeCheckResults.EnsureVisible(listView_PrimeCheckResults.Items.Count - 1);
DetermineExportStatus();
UpdateStatistics(); //After a new result is entered, we need to update the labels showing the total entrys, primes, and composites in the listView control.
}
/// <summary>
/// Sorts the results in the list view from least to greatest.
/// </summary>
/// <param name="sender">The objecgt that triggered the event handler</param>
/// <param name="e">The event information</param>
private void Button_SortResults_Click(object sender, EventArgs e)
{
//Temporarily transfer the elements in the list view to an array. The array has a sort method I implemented with the I-Comparable interface.
PrimeResult[] resultArray = new PrimeResult[listView_PrimeCheckResults.Items.Count];
for (int i = 0; i < resultArray.Length; i++)
{
resultArray[i] = (PrimeResult)listView_PrimeCheckResults.Items[i].Tag; //Add each element in the listView collection to the array
}
Array.Sort(resultArray); //Call my sort method. The sort method, CompareTo, is implemented in the PrimeResult class.
ClearAllFromResultList(); //Clear the list. We will be adding the same elements back, just sorted.
foreach (PrimeResult result in resultArray)
{
CheckNumAndDisplayResult(result.Number); //This method adds each element back to the listView.
}
if (listView_PrimeCheckResults.Items.Count > 0)
{
listView_PrimeCheckResults.EnsureVisible(0);
}
}
/// <summary>
/// Copy constructor so we don't violate data hiding
/// </summary>
/// <param name="result">The PrimeResult object we want to duplicate</param>
public PrimeResult(PrimeResult result)
{
this.numberChecked = result.Number; //Copy the values.
this.isPrime = result.isPrime;
}