protected override void OnMouseDown (MouseEventArgs e)
{
base.OnMouseDown (e);
bool ctrl_pressed = ((Control.ModifierKeys & Keys.Control) != 0);
bool shift_pressed = ((Control.ModifierKeys & Keys.Shift) != 0);
HitTestInfo testinfo;
testinfo = HitTest (e.X, e.Y);
switch (testinfo.Type) {
case HitTestType.Cell:
if (testinfo.Row < 0 || testinfo.Column < 0)
break;
if (rows[testinfo.Row].IsExpanded) {
Rectangle relation_area = rows[testinfo.Row].relation_area;
relation_area.Y = rows[testinfo.Row].VerticalOffset + cells_area.Y + rows[testinfo.Row].Height - rows[testinfo.Row].RelationHeight;
if (relation_area.Contains (e.X, e.Y)) {
/* the click happened in the relation area, navigate to the new table */
int relative = e.Y - relation_area.Y;
NavigateTo (testinfo.Row, CurrentTableStyle.Relations[relative / LinkFont.Height]);
return;
}
}
DataGridCell new_cell = new DataGridCell (testinfo.Row, testinfo.Column);
if ((new_cell.Equals (current_cell) == false) || (!is_editing)) {
ResetSelection ();
CurrentCell = new_cell;
Edit ();
} else {
CurrentTableStyle.GridColumnStyles[testinfo.Column].OnMouseDown (e, testinfo.Row, testinfo.Column);
}
break;
case HitTestType.RowHeader:
bool expansion_click = false;
if (CurrentTableStyle.HasRelations) {
if (e.X > row_headers_area.X + row_headers_area.Width / 2) {
/* it's in the +/- space */
if (IsExpanded (testinfo.Row))
Collapse (testinfo.Row);
else
Expand (testinfo.Row);
expansion_click = true;
}
}
CancelEditing ();
CurrentRow = testinfo.Row;
if (!ctrl_pressed && !shift_pressed && !expansion_click) {
ResetSelection (); // Invalidates selected rows
}
if ((shift_pressed || expansion_click) && selection_start != -1) {
ShiftSelection (testinfo.Row);
} else { // ctrl_pressed or single item
selection_start = testinfo.Row;
Select (testinfo.Row);
}
OnRowHeaderClick (EventArgs.Empty);
break;
case HitTestType.ColumnHeader:
if (CurrentTableStyle.GridColumnStyles.Count == 0)
break;
if (AllowSorting == false)
break;
if (ListManager.List is IBindingList == false)
break;
// Don't do any sort if we are empty, as .net does
if (ListManager.Count == 0)
return;
ListSortDirection direction = ListSortDirection.Ascending;
PropertyDescriptor prop = CurrentTableStyle.GridColumnStyles[testinfo.Column].PropertyDescriptor;
IBindingList list = (IBindingList) ListManager.List;
if (list.SortProperty != null) {
CurrentTableStyle.GridColumnStyles[list.SortProperty].ArrowDrawingMode
= DataGridColumnStyle.ArrowDrawing.No;
}
if (prop == list.SortProperty && list.SortDirection == ListSortDirection.Ascending) {
direction = ListSortDirection.Descending;
}
CurrentTableStyle.GridColumnStyles[testinfo.Column].ArrowDrawingMode =
direction == ListSortDirection.Ascending ?
DataGridColumnStyle.ArrowDrawing.Ascending : DataGridColumnStyle.ArrowDrawing.Descending;
list.ApplySort (prop, direction);
Refresh ();
if (this.is_editing)
//CurrentTableStyle.GridColumnStyles[CurrentColumn].UpdateUI ();
this.InvalidateColumn (CurrentTableStyle.GridColumnStyles[CurrentColumn]);
break;
case HitTestType.ColumnResize:
if (e.Clicks == 2) {
EndEdit ();
ColumnResize (testinfo.Column);
} else {
resize_column = testinfo.Column;
column_resize_active = true;
resize_column_x = e.X;
resize_column_width_delta = 0;
EndEdit ();
DrawResizeLineVert (resize_column_x);
}
break;
case HitTestType.RowResize:
if (e.Clicks == 2) {
EndEdit ();
RowResize (testinfo.Row);
} else {
resize_row = testinfo.Row;
row_resize_active = true;
resize_row_y = e.Y;
resize_row_height_delta = 0;
EndEdit ();
DrawResizeLineHoriz (resize_row_y);
}
break;
case HitTestType.Caption:
if (back_button_rect.Contains (e.X, e.Y)) {
back_button_active = true;
Invalidate (back_button_rect);
}
if (parent_rows_button_rect.Contains (e.X, e.Y)) {
parent_rows_button_active = true;
Invalidate (parent_rows_button_rect);
}
break;
default:
break;
}
}
private void GoTo(string nodePath, DataGridCell cell)
{
lock(syncRoot)
{
if(this.tablesLoading == null) return; // The tree is being loaded
if(this.navigating) return; // This method is already on the callstack
DataView table = (DataView) this.data[nodePath];
if(table != null && table == this.dataGrid.DataSource)
{
// Grid is already in view
if(!cell.Equals(anyCell)) this.dataGrid.CurrentCell = cell;
return;
}
if(cell.Equals(anyCell)) cell = zeroCell;
if(this.historyBack.Count == 0 || nodePath != (string) this.historyBack.Peek())
{
this.historyBack.Push(nodePath);
if(this.cellHistoryBack.Count > 0 && this.historyForward != null)
{
this.cellHistoryBack.Pop();
this.cellHistoryBack.Push(this.dataGrid.CurrentCell);
}
this.cellHistoryBack.Push(cell);
}
if(this.historyForward != null)
{
this.historyForward.Clear();
this.cellHistoryForward.Clear();
}
if(table != null || nodePath.Length == 0 || this.dataProviderMap[nodePath] == null)
{
this.dataGrid.CaptionText = nodePath;
this.dataGrid.CaptionBackColor = SystemColors.ActiveCaption;
this.dataGrid.CaptionForeColor = SystemColors.ActiveCaptionText;
this.dataGrid.DataSource = table;
this.dataGrid.CurrentCell = cell;
this.dataGrid.Focus();
}
else
{
this.dataGrid.CaptionText = nodePath + " (loading...)";
this.dataGrid.CaptionBackColor = SystemColors.InactiveCaption;
this.dataGrid.CaptionForeColor = SystemColors.InactiveCaptionText;
this.dataGrid.DataSource = table;
if(!this.tablesLoading.Contains(nodePath))
{
this.tablesLoading.Add(nodePath);
this.SetCursor();
#if SINGLETHREAD
this.LoadTable(nodePath);
#else
new WaitCallback(this.LoadTable).BeginInvoke(nodePath, null, null);
#endif
}
}
this.findButton.Enabled = this.findTextBox.Text.Length > 0 && !searching;
TreeNode treeNode = this.FindNode(nodePath);
if(treeNode != this.treeView.SelectedNode)
{
this.navigating = true;
this.treeView.SelectedNode = treeNode;
this.navigating = false;
}
}
}