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| #region Adding the new event
public delegate void BoolValueChangedEventHandler(object sender, BoolValueChangedEventArgs e);
public class BoolValueChangedEventArgs : EventArgs
{
private int _column;
private int _row;
private bool _value;
public BoolValueChangedEventArgs(int row, int col, bool val)
{
_row = row;
_column = col;
_value = val;
}
public int Column
{
get{ return _column;}
set{ _column = value;}
}
public int Row
{
get{ return _row;}
set{ _row = value;}
}
public bool BoolValue
{
get{ return _value;}
set{ _value = value;}
}
}
#endregion
#region Derived ColumnStyle with a BoolValueChanged event exposed
public class MonDataGridBoolColumn: DataGridBoolColumn
{
public event BoolValueChangedEventHandler BoolValueChanged;
bool saveValue;
int saveRow ;
bool lockValue;
bool beingEdited;
int _column;
public const int VK_SPACE = 32 ;// 0x20
public const int VK_ENTREE = 13;
[System.Runtime.InteropServices.DllImport("user32.dll")]
static extern short GetKeyState(int nVirtKey);
public MonDataGridBoolColumn(int column)
{
saveValue = false;
saveRow = -1;
lockValue = false;
_column = column;
//base.AllowNull=false;
//base.NullValue=false;
}
protected override void Edit(System.Windows.Forms.CurrencyManager source, int rowNum, System.Drawing.Rectangle bounds, bool readOnly, string instantText, bool cellIsVisible)
{
lockValue = true;
beingEdited = true;
saveRow = rowNum;
try
{
if(GetColumnValueAtRow(source, rowNum).ToString()=="")
{
saveValue=true;
}
else
{
//string test =GetColumnValueAtRow(source, rowNum).ToString
saveValue = (bool) base.GetColumnValueAtRow(source, rowNum);
}
}
catch
{
saveValue=false;
}
base.Edit(source, rowNum, bounds, readOnly, instantText, cellIsVisible);
}
protected override void Paint(System.Drawing.Graphics g, System.Drawing.Rectangle bounds, System.Windows.Forms.CurrencyManager source, int rowNum, System.Drawing.Brush backBrush, System.Drawing.Brush foreBrush, bool alignToRight)
{
Point mousePos = this.DataGridTableStyle.DataGrid.PointToClient(Control.MousePosition);
DataGrid dg = this.DataGridTableStyle.DataGrid;
bool isClickInCell = ((Control.MouseButtons == MouseButtons.Left) &&
dg.GetCellBounds(dg.CurrentCell).Contains(mousePos) );
bool changing = dg.Focused && ( isClickInCell
|| GetKeyState(VK_SPACE) < 0 || GetKeyState(VK_ENTREE)<0); // or spacebar
if(!lockValue && changing && saveRow == rowNum)
{
saveValue = !saveValue;
lockValue = false;
//fire the event
if(BoolValueChanged != null)
{
BoolValueChangedEventArgs e = new BoolValueChangedEventArgs(rowNum, _column, saveValue);
BoolValueChanged(this, e);
}
}
if(saveRow == rowNum)
lockValue = false;
base.Paint( g, bounds, source, rowNum, backBrush, foreBrush, alignToRight);
}
protected override bool Commit(System.Windows.Forms.CurrencyManager dataSource, int rowNum)
{
lockValue = true;
beingEdited = false;
return base.Commit(dataSource, rowNum);
}
}
#endregion
#region Handler for catching the bool changes
private void HandleBoolChanges(object sender, BoolValueChangedEventArgs e)
{
string s = string.Format("Bool Changes: row {0}, col {1} value {2}", e.Row, e.Column, e.BoolValue);
Console.WriteLine(s);
if (e.BoolValue==true)
{
btnsupp.Enabled = true;
}
else
{
btnsupp.Enabled = false;
for(int i=0;i<ds_grossiste.Tables[0].Rows.Count;i++)
{
if(Convert.ToBoolean(dgAvoirs[i,5])==true)
{
btnsupp.Enabled =true;
goto Fin;
}
}
}
Fin:
;
}
#endregion |
