private void SetupColumnsSelectorDropDown(object sender, EventArgs e)
{
DropDownButton b = sender as DropDownButton;
ParsedColumnExpressionMsx expr = b.Tag as ParsedColumnExpressionMsx;
ColumnExpressionSelectorDropDown.Setup(expr, Axis, Visual, b, this, EditValueChanged);
}
private void RemoveExpression_Click(object sender, EventArgs e)
{
ParsedColumnExpressionMsx cx = LastDropDownButtonClicked.Tag as ParsedColumnExpressionMsx;
if (AxisExpressionList.ColExprList.Contains(cx))
{
AxisExpressionList.ColExprList.Remove(cx);
}
AxisExpressionList.Expression = AxisExpressionList.Format();
SetupLayoutPanel();
EditValueChanged();
return;
}
public List <ParsedColumnExpressionMsx> ColExprList = new List <ParsedColumnExpressionMsx>(); // list of parsed column expressions in axis expression
/// <summary>
/// Parse an axis expression
/// </summary>
/// <param name="axisExpr"></param>
/// <returns></returns>
public static ParsedExpressionListMsx Parse(string axisExpr)
{
ParsedExpressionListMsx ax = new ParsedExpressionListMsx();
ax.Expression = axisExpr;
List <string> colExprs = Split(axisExpr);
foreach (string colExpr in colExprs)
{
ParsedColumnExpressionMsx cx = ParsedColumnExpressionMsx.Parse(colExpr);
ax.ColExprList.Add(cx);
cx.ParentAxisExpressionList = ax;
}
return(ax);
}
private void MoveExpressionRightMenuItem_Click(object sender, EventArgs e)
{
ParsedColumnExpressionMsx cx = LastDropDownButtonClicked.Tag as ParsedColumnExpressionMsx;
int i1 = AxisExpressionList.ColExprList.IndexOf(cx);
if (i1 >= (AxisExpressionList.ColExprList.Count - 1))
{
return;
}
AxisExpressionList.ColExprList.Remove(cx);
AxisExpressionList.ColExprList.Insert(i1 + 1, cx);
AxisExpressionList.Expression = AxisExpressionList.Format();
SetupLayoutPanel();
EditValueChanged();
return;
}
/// <summary>
/// Format an axis expression by catenating the associated individual
/// collumn expressions with comma separators
/// </summary>
/// <returns></returns>
public string Format()
{
string expr = "";
for (int ei = 0; ei < ColExprList.Count; ei++)
{
if (Lex.IsDefined(expr))
{
expr += ", ";
}
ParsedColumnExpressionMsx ce = ColExprList[ei];
string colExpr = ce.FormatEscapedExpression();
expr += colExpr;
}
return(expr);
}
} // return true if the extra menu item was selected
private void ColButton_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Right) // right button ContextMenu
{
DropDownButton b = sender as DropDownButton;
LastDropDownButtonClicked = b;
ParsedColumnExpressionMsx cx = b.Tag as ParsedColumnExpressionMsx;
if (cx == null || cx.ColumnNames.Count == 0)
{
return; // probable the add (+) button
}
List <ParsedColumnExpressionMsx> cxl = cx.AxisExpression.ColExprList;
int i = cxl.IndexOf(cx);
MoveExpressionLeftMenuItem.Enabled = (i > 0);
MoveExpressionRightMenuItem.Enabled = (i >= 0 && i < cxl.Count - 1);
Point p = new Point(0, b.Height);
ExpressionRtClickContextMenu.Show(b, p);
}
}
public static string GetColumnButtonLabel(ParsedColumnExpressionMsx cx)
{
string exprLabel;
if (cx != null && cx.ColumnNames.Count > 0)
{
exprLabel = cx.ColumnNames[0];
if (Lex.Ne(cx.Expression, exprLabel) && Lex.Ne(cx.Expression, "[" + exprLabel + "]"))
{
exprLabel = cx.Expression;
}
}
else // add button
{
exprLabel = "+";
}
return(exprLabel);
}
/// <summary>
/// Setup the LayoutPanel with the list of defined column expressions and button to add an expression as appropriate
/// </summary>
public void SetupLayoutPanel()
{
int cols = AxisExpressionList.ColExprList.Count;
if (cols == 0)
{
cols++;
}
if (MultiExpressionSelectionAllowed)
{
cols++;
}
LayoutPanel.Controls.Clear();
LayoutPanel.ColumnCount = cols;
for (int ci = cols - 1; ci >= 0; ci--) // insert in reverse order
{
ParsedColumnExpressionMsx cx = null;
if (ci < AxisExpressionList.ColExprList.Count)
{
cx = AxisExpressionList.ColExprList[ci];
}
else
{
cx = new ParsedColumnExpressionMsx();
cx.AxisExpression = AxisExpressionList;
}
DropDownButton b = BuildColumnDropDownButton();
string exprLabel = GetColumnButtonLabel(cx);
b.Text = exprLabel; // should be formatted expression instead?
b.Tag = cx;
LayoutPanel.Controls.Add(b, ci, 0);
}
return;
}
/// <summary>
/// Setup the dropdown for a Column(s) expression
/// </summary>
/// <param name="parsedColExpr"></param>
/// <param name="axis"></param>
/// <param name="visual"></param>
/// <param name="b"></param>
/// <param name="parentColumnExressionSelectorControl"></param>
/// <param name="callerEditValueChanged"></param>
public void Setup(
ParsedColumnExpressionMsx parsedColExpr,
AxisMsx axis,
VisualMsx visual,
DropDownButton b,
ColumnsSelector parentColumnExressionSelectorControl,
EventHandler callerEditValueChanged = null)
{
InSetup = true;
ParsedColExpr = parsedColExpr;
Axis = axis;
Visual = visual;
InvokingButton = b;
PC = parentColumnExressionSelectorControl;
SVM = PC.SVM;
CallerEditValueChanged = callerEditValueChanged;
DataTableMsx dt = GetSelectorDataTable();
if (dt != null)
{
TableSelector.Name = dt.Name;
}
else
{
TableSelector.Name = "";
}
List <DataTableMsx> tables = Axis.GetAllowedDataTables();
ColumnList.Items.Clear();
string selectedColName = null;
if (parsedColExpr.ColumnNames.Count > 0)
{
selectedColName = parsedColExpr.ColumnNames[0];
}
foreach (DataColumnMsx col in dt.Columns)
{
CheckedListBoxItem item = new CheckedListBoxItem();
item.Description = col.Name;
if (Lex.Eq(col.Name, selectedColName))
{
item.CheckState = CheckState.Checked;
}
ColumnList.Items.Add(item);
}
//DataMapControl.ShowSelectedColumnCheckBoxes = true;
//DataMapControl.SelectSingleColumn = true;
//DataMapControl.ShowTableControls = false;
//DataMapControl.Setup(SVM, DataMapSelectedColumnChanged);
////DataMapControl.MobiusTableNameCol.Visible = false;
////DataMapControl.MobiusColNameCol.Visible = false;
//DataMapControl.FieldGridView.OptionsView.ColumnAutoWidth = false;
////DataMapControl.FieldGridView.OptionsView.ShowColumnHeaders = false;
InSetup = false;
return;
}
public static ParsedColumnExpressionMsx Parse(string expr)
{
Lex lex = new Lex();
lex.SetDelimiters(" , ; ( ) [ ]");
lex.OpenString(expr);
StringBuilder sb = new StringBuilder();
PositionedToken lastTok = null, leftBracket = null;
ParsedColumnExpressionMsx colExpr = new ParsedColumnExpressionMsx();
colExpr.Expression = expr;
List <PositionedToken> tokens = new List <PositionedToken>(); // list of tokens seen
int parenDepth = 0;
while (true)
{
PositionedToken pTok = lex.GetPositionedToken();
if (pTok == null)
{
break;
}
tokens.Add(pTok);
if (lastTok != null)
{ // include same white space between tokens
int wsBeg = lastTok.Position + lastTok.Text.Length;
sb.Append(expr.Substring(wsBeg, pTok.Position - wsBeg));
}
string tok = pTok.Text;
if (pTok.Text == "(")
{
parenDepth++;
}
else if (pTok.Text == ")")
{
parenDepth--;
}
else if (tok == "[")
{
leftBracket = pTok;
}
else if (tok == "]")
{
if (leftBracket != null)
{
int p = leftBracket.Position + 1;
int l = pTok.Position - p;
string colName = expr.Substring(p, l);
colExpr.ColumnNames.Add(colName);
leftBracket = null;
}
}
else if (Lex.Eq(tok, "as"))
{
pTok = lex.GetPositionedToken();
if (pTok == null)
{
break;
}
tokens.Add(pTok);
colExpr.Alias = expr.Substring(pTok.Position + 2).Trim();
}
lastTok = pTok;
}
return(colExpr);
}
