/// <summary> method btnInsert_Click
/// When user clickes on "Insert" button, validate the data in the lower textbox and insert a new line in the calculation
/// immediately before the selected line.
/// </summary>
private void btnInsert_Click(object sender, EventArgs e)
{
string insertStr = txtSelect.Text;
int n = lstDisplay.SelectedIndex;
validCalcuLine = true;
// If the selected line in the listbox is the first line, mark the firstline.
if (n == 0)
{
firstLine = true;
}
else
{
firstLine = false;
}
// Validate the data in the lower textbox.
CalcLineInvalidation(insertStr, insertStr.Length);
// If the data in the lower textbox is valid, insert a new line in the calculation immediately before the selected line.
if (validCalcuLine)
{
currentCalcLine = new CalcLine(insertStr);
theCalculation.Insert(currentCalcLine, n);
lstDisplay.SelectedIndex = n;
}
}
/// <summary> method LoadFromFile
/// Clear the ArrayList and then open the given file and convert the lines of the file
/// to a set of CalcLine objects held in the ArrayList. Then redisplay the calculations.
/// Return a bool variable giving the result.
/// </summary>
public bool LoadFromFile(string filename)
{
// Create a new StreamReader object to read data from the given file
StreamReader sr = new StreamReader(filename);
string temp = sr.ReadLine();
// Clear the ArrayList
theCalcs.Clear();
try
{
// If current line is not null, creat a new CalcLine object from current line and
// add the CalcLine object to ArrayList. Then read next line.
while (temp != null)
{
CalcLine cl = new CalcLine(temp);
theCalcs.Add(cl);
temp = sr.ReadLine();
}
// Redisplay the listbox with latest ArrayList and return true.
Redisplay();
calcFilename = filename;
return(true);
}
catch (Exception)
{
// If an exception occur, return false;
return(false);
}
finally
{
sr.Close(); // Close the StreamReader object at the end of the method.
}
}
/// <summary> method btnUpdate_Click
/// When user clickes on "Update" button, validate the data in the lower textbox and update the Calculation object and the listbox.
/// </summary>
private void btnUpdate_Click(object sender, EventArgs e)
{
string selectStr = txtSelect.Text;
int n = lstDisplay.SelectedIndex;
validCalcuLine = true;
// If the selected line in the listbox is the first line, mark the firstline.
if (n == 0)
{
firstLine = true;
}
else
{
firstLine = false;
}
// Validate the data in the lower textbox.
CalcLineInvalidation(selectStr, selectStr.Length);
// If the data in the lower textbox is valid, update the Calculation object and the listbox.
if (validCalcuLine)
{
currentCalcLine = new CalcLine(txtSelect.Text);
theCalculation.Replace(currentCalcLine, n);
lstDisplay.SelectedIndex = n;
}
}
/// <summary>
/// method : txt_KeyPress
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="KeyPressEventArgs"/> instance containing the event data.</param>
private void txt_KeyPress(object sender, KeyPressEventArgs e)
{
// If they press the backspace let them.
if (e.KeyChar == '\b')
{
return;
}
CalcLine calcLine = null;
// 1st char in the line
if (txtValue.Text.Length == 0)
{
if (e.KeyChar == '+' || e.KeyChar == '-' || e.KeyChar == '\n')
{
}
else
{
e.Handled = true;
MessageBox.Show("You must enter a +, - or the Enter key as the first value", "Error");
}
}
else
{
// Not the first char
// Is it a terminating char
if (e.KeyChar == '+' || e.KeyChar == '-' || e.KeyChar == '*' || e.KeyChar == '/' || e.KeyChar == '#' || e.KeyChar == '=' || e.KeyChar == '\r')
{
changed = true;
calcLine = new CalcLine(txtValue.Text);
calculation.Add(calcLine);
// Is is a char that needs to go to the start of the line
if (e.KeyChar == '+' || e.KeyChar == '-' || e.KeyChar == '*' || e.KeyChar == '/')
{
txtValue.Text = e.KeyChar.ToString();
txtValue.Select(1, 1);
e.Handled = true;
return;
} // Is it a subtotal
if (e.KeyChar == '#')
{
calcLine = new CalcLine(Operator.subtotal);
calculation.Add(calcLine);
} // Is it a total
else if (e.KeyChar == '=')
{
calcLine = new CalcLine(Operator.total);
calculation.Add(calcLine);
}
txtValue.Text = "";
}
else if (!char.IsDigit(e.KeyChar))
{
e.Handled = true;
MessageBox.Show("You must enter a digit or #, +, -, *. /, or =", "Error");
}
}
}
// Clear the ArrayList
//Then open the given file and convert lines of the file to a set of CalcLine objects held in ArrayList
// Redisplay Calculations
public void LoadFromFile(string filename)
{
Clear();
StreamReader sr = new StreamReader(filename);
string temp = sr.ReadLine();
while (temp != null)
{
var calc = new CalcLine(temp);
Add(calc);
temp = sr.ReadLine();
}
sr.Close();
}
public void AddExercise(Exercise exercise, Calculation calculation, Plate plate)
{
CalcLine line = lineCollection
.Where(c => c.Exercise.ExerciseID == exercise.ExerciseID)
.FirstOrDefault();
if (line == null)
{
lineCollection.RemoveAll(e => e.Exercise.ExerciseID != exercise.ExerciseID);
lineCollection.Add(new CalcLine
{
Exercise = exercise,
Calculation = calculation,
Plate = plate
});
}
}
/// <summary> method AddCalcLine
/// Convert the text in the upper textbox into a CalcLine object and add the object to the Calculation object.
/// </summary>
private void AddCalcLine(char ch)
{
currentCalcLine = new CalcLine(txtInput.Text);
theCalculation.Add(currentCalcLine);
txtInput.Text = "";
// If the character ch is "#" or "=", create a new CalcLine object from ch and add to the Calculation object.
if ((ch == '#') || (ch == '='))
{
currentCalcLine = new CalcLine(ch.ToString());
theCalculation.Add(currentCalcLine);
}
// If the character ch is ENTER, create a new CalcLine object from "=" and add to the Calculation object.
else if (ch == 13)
{
currentCalcLine = new CalcLine("=");
theCalculation.Add(currentCalcLine);
}
}
/// <summary>
/// method : btnInsert_Click
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
private void btnInsert_Click(object sender, EventArgs e)
{
var calcLine = txtReplacementValue.Text;
var firstChar = calcLine[0];
if (firstChar == '+' || firstChar == '-')
{
var secondChar = calcLine[1];
if (char.IsDigit(secondChar))
{
var calc = new CalcLine(calcLine);
calculation.Insert(calc, lstCalculationLines.SelectedIndex + 1);
}
else
{
MessageBox.Show("The characters immediately following the first character must be numeric", "Error");
}
}
else
{
MessageBox.Show("The first character must be a + or - ", "Error");
}
}
/// <summary> method Add
/// Add a CalcLine object to the ArrayList then redisplay the calculations, and mark the
/// Calculation as modified.
/// </summary>
public void Add(CalcLine cl)
{
theCalcs.Add(cl);
Redisplay();
isModified = true;
}
/// <summary> method Insert
/// Insert the newCalc CalcLine object in the ArrayList immediately before the nth object, and then
/// redisplay the calculations.
/// Mark the caculation as modified
/// </summary>
public void Insert(CalcLine newCalc, int n)
{
theCalcs.Insert(n, newCalc);
Redisplay();
isModified = true;
}
/// <summary> method Replace
/// Replace the nth CalcLine object in the ArrayList with the newCalc object passed by parameter,
/// and then redisplay the calculations.
/// Mark the caculation as modified
/// </summary>
public void Replace(CalcLine newCalc, int n)
{
theCalcs[n] = newCalc;
Redisplay();
isModified = true;
}
/// <summary>
/// method : Replace
/// Repalce the nth CalcLine object in the ArrayList wwith new calc object
/// Redisplay the calculations
/// </summary>
/// <param name="newCalc">The new calculate.</param>
/// <param name="n">The n.</param>
public void Replace(CalcLine newCalc, int n)
{
theCalcs[n] = newCalc;
Redisplay();
}
/// <summary>
/// method : Add
/// Clear the ArrayList and the ListBox
/// </summary>
/// <param name="cl">The cl.</param>
public void Add(CalcLine cl)
{
theCalcs.Add(cl);
Redisplay();
}
/// <summary>
/// method : Insert
/// Insert new CalcLine object ArrayList immediately before the nth object
/// Redisplay the claculations
/// </summary>
/// <param name="newCalc">The new calculate.</param>
/// <param name="n">The n.</param>
public void Insert(CalcLine newCalc, int n)
{
theCalcs.Insert(n - 1, newCalc);
Redisplay();
}
