/// <summary>
/// Deletes zeros
/// </summary>
private void DelZero()
{
MathSymbol s = First;
if (s != null)
{
MathSymbol s1 = s.Next;
if (s1 != null)
{
if (s.SymbolType == (int)FormulaConstants.Number & s.DoubleValue == 0 & s.Symbol == '?' & s1.Symbol == '-')
{
s.Remove();
}
}
}
s = First;
while (s != null)
{
if (s.HasChildren)
{
for (int i = 0; i < s.Count; i++)
{
s[i].DelZero();
}
}
s = s.Next;
}
}
/// <summary>
/// Key up
/// </summary>
/// <param name="sender">Sender</param>
/// <param name="args">Arguments</param>
private void keyUp(object sender, KeyEventArgs args)
{
if (args.KeyData != Keys.Back)
{
return;
}
MathSymbol sym = formula.Last;
if (sym != null)
{
sym.Remove();
DrawFormulaOnComponent();
}
}
/// <summary>
/// Deletes unnecessary multiplication symbols
/// </summary>
private void DelMult()
{
MathSymbol s = First;
if (s != null)
{
MathSymbol s1 = s.Next;
while (s1 != null)
{
if (s1.SymbolType == (int)FormulaConstants.Binary & s1.Symbol == '*')
{
if (s.SymbolType != (int)FormulaConstants.Number | s1.Next.SymbolType != (int)FormulaConstants.Number)
{
s1.Remove();
s = s.Next;
if (s == null)
{
break;
}
s1 = s.Next;
continue;
}
}
s = s1;
s1 = s.Next;
}
}
s = First;
while (s != null)
{
if (s.HasChildren)
{
for (int i = 0; i < s.Count; i++)
{
s[i].DelMult();
}
}
s = s.Next;
}
}
/// <summary>
/// Reverses digital to symbolic represrntation
/// </summary>
private void ReverseNumber()
{
MathSymbol s = First;
while (s != null)
{
if (s.SymbolType == (int)FormulaConstants.Number)
{
if (s.Symbol == '?')
{
List <MathFormula> f = s.Children;
double a = s.DoubleValue;
if (a == Math.E | a == Math.PI)
{
s.Append(new SimpleSymbol((a == Math.E) ? 'e' : 'p'));
MathSymbol s1 = s.Next;
s.Remove();
s1.Children = f;
s = s1.Next;
continue;
}
int b = 0;
bool intv = false;
if (Math.Abs(a - Math.Ceiling(a)) < ROUND_EPS)
{
b = (int)Math.Ceiling(a);
intv = true;
}
else if (Math.Abs(a - Math.Floor(a)) < ROUND_EPS)
{
b = (int)Math.Floor(a);
intv = true;
}
string str = "";
if (intv)
{
str = b + "";
}
else
{
str = a + "";
}
MathSymbol sOne = s;
for (int i = 0; i < str.Length; i++)
{
MathSymbol symb = (str[i] == MathSymbol.DecimalSep[0]) ?
new BinarySymbol('.') :
new SimpleSymbol(str[i], false, (int)FormulaConstants.Number);
sOne.Append(symb);
sOne = sOne.Next;
}
s.Remove();
sOne.Children = f;
s = sOne.Next;
}
}
else
{
s = s.Next;
}
}
s = First;
while (s != null)
{
if (s.HasChildren)
{
List <MathFormula> f = s.Children;
if (f != null)
{
for (int i = 0; i < f.Count; i++)
{
MathFormula form = f[i] as MathFormula;
if (form.Count > 0)
{
form.ReverseNumber();
}
}
}
}
s = s.Next;
}
}
/// <summary>
/// The "on click" event handler
/// </summary>
/// <param name="sender">The sender</param>
/// <param name="e">The event arguments</param>
private void onMouseClicked(object sender, MouseEventArgs e)
{
translate(e);
if (movedSymbol == null)
{
movedSymbol = newSymbol;
if (movedSymbol != null)
{
if (movedSymbol is DateTimeSymbol)
{
DateTimeSymbol dts = movedSymbol as DateTimeSymbol;
dts.DateTime = dateTime.DateTime;
}
IDrawableSymbol ds = movedSymbol as IDrawableSymbol;
wImage = ds.PureDrawable.SymbolImage.Width;
hImage = ds.PureDrawable.SymbolImage.Height;
control.Cursor = CURSOR_MOVE;
oldX = imagePoint.X;
oldY = imagePoint.Y;
DrawCursor();
if (newCursor != null)
{
DrawCursor(newCursor, true, true);
}
}
if (newRemoveCursor != null)
{
MathSymbol s = (MathSymbol)newRemoveCursor;
if (s.Contains(newCursor))
{
newCursor = null;
oldCursor = null;
}
s.Remove();
newRemoveCursor = null;
oldRemoveCursor = null;
DrawFormulaOnComponent();
}
}
else
{
if (newCursor == null)
{
movedSymbol = null;
DrawCursor();
newCursor = null;
oldCursor = null;
control.Cursor = CURSOR_EDIT;
}
else
{
if (newCursor is MathSymbol)
{
MathSymbol ds = newCursor as MathSymbol;
newCursor = MathSymbolDrawable.InsertObject(ds, movedSymbol) as IInsertedObject;
}
else if (newCursor is MathFormulaDrawable)
{
MathFormulaDrawable mf = newCursor as MathFormulaDrawable;
newCursor = mf.InsertObject(movedSymbol) as IInsertedObject;
}
//newCursor = newCursor.InsertObject(movedSymbol);
movedSymbol = null;
DrawCursor();
DrawFormulaOnComponent();
oldCursor = movedSymbol as IInsertedObject;
control.Cursor = CURSOR_EDIT;
}
}
}