/// <summary>Получение блоков формулы математического вычисления</summary>
/// <param name="a_Elements">Список элементов</param>
/// <param name="a_Formula">Формула</param>
public Cl_FormulaMathematicalBlock[] f_GetMathematicalsBlocks(Cl_Element[] a_Elements, string a_Formula)
{
string formula = a_Formula;
var blocks = new List <Cl_FormulaMathematicalBlock>();
while (!string.IsNullOrWhiteSpace(formula))
{
Cl_FormulaMathematicalBlock block = f_GetFirstMathematicalBlockFromText(a_Elements, formula);
if (block != null)
{
string text = block.f_GetTextFromBlock();
if (string.IsNullOrWhiteSpace(text))
{
return(null);
}
blocks.Add(block);
string txtBlock = block.f_GetTextFromBlock();
formula = formula.Substring(txtBlock.Length);
}
else
{
return(null);
}
}
return(blocks.ToArray());
}
/// <summary>Удаление блока из формулы</summary>
/// <param name="a_Block">Блок</param>
private bool f_RemoveBlock(Cl_FormulaMathematicalBlock a_Block)
{
if (a_Block == null)
{
return(false);
}
if (ctrlRTBFormula.TextLength == 0)
{
return(false);
}
string text = a_Block.f_GetTextFromBlock();
if (string.IsNullOrWhiteSpace(text))
{
return(false);
}
int start = 0;
if (text.Length > ctrlRTBFormula.TextLength)
{
start = 0;
}
else
{
start = ctrlRTBFormula.TextLength - text.Length;
}
ctrlRTBFormula.ReadOnly = false;
ctrlRTBFormula.SelectionStart = start;
ctrlRTBFormula.SelectionLength = text.Length;
ctrlRTBFormula.SelectedText = "";
ctrlRTBFormula.ReadOnly = true;
m_Blocks.RemoveAt(m_Blocks.LastIndexOf(a_Block));
return(true);
}
private void ctrlBDelLastAction_Click(object sender, EventArgs e)
{
if (m_Blocks.Count == 0)
{
return;
}
Cl_FormulaMathematicalBlock lastBlock = m_Blocks.LastOrDefault();
f_RemoveBlock(lastBlock);
f_UpdateControls(!m_VisibilityFormula);
}
/// <summary>Проверка корректности формулы математической операции</summary>
public bool f_Valid(ICollection <Cl_FormulaMathematicalBlock> a_Blocks)
{
Cl_FormulaMathematicalBlock block = a_Blocks.LastOrDefault();
if (block != null)
{
return(!block.p_IsOperand);
}
else
{
return(true);
}
}
// <summary>Добавление блока в формулу</summary>
/// <param name="a_Block">Блок</param>
/// <returns></returns>
private bool f_AppendBlock(Cl_FormulaMathematicalBlock a_Block)
{
if (a_Block == null)
{
return(false);
}
string text = a_Block.f_GetTextFromBlock();
if (string.IsNullOrWhiteSpace(text))
{
return(false);
}
ctrlRTBFormula.SelectionStart = ctrlRTBFormula.TextLength;
ctrlRTBFormula.SelectionLength = 0;
ctrlRTBFormula.SelectionColor = a_Block.f_GetColorBlock();
ctrlRTBFormula.AppendText(text);
ctrlRTBFormula.SelectionColor = ctrlRTBFormula.ForeColor;
m_Blocks.Add(a_Block);
return(true);
}
