コード例 #1
0
ファイル: Table.cs プロジェクト: ngunhaSO/QueryBuilder
        private void tvColumns_DragDrop(Object sender, DragEventArgs e)
        {
            string sourceTableName;
            TreeNode sourceNode = (TreeNode)e.Data.GetData(typeof(TreeNode));
            sourceTableName = sourceNode.TreeView.Parent.Name;
            Table sourceTable = (Table)sourceNode.TreeView.Parent;
            Point start = sourceNode.TreeView.Parent.Location; //start position of a line
            Debug.WriteLine("source parent point: " + start.ToString());
            Debug.WriteLine("source node location: " + sourceNode.TreeView.PointToClient(new Point(e.X, e.Y)));

            string destinationTableName;
            TreeNode destinationNode;
            Table targetTable;
            Point destinationPoint = tvColumns.PointToClient(new Point(e.X, e.Y)); //destination of the tree node where we do the drop
            destinationNode = tvColumns.GetNodeAt(destinationPoint);
            Point end = destinationNode.TreeView.Parent.Location; //end position of a line;
            Debug.WriteLine("dest parent point: " + end.ToString());
            Debug.WriteLine("dest node location: " + destinationNode.TreeView.PointToClient(new Point(e.X, e.Y)));
            if (destinationNode != null)
            {
                destinationTableName = (sender as TreeView).Parent.Name;
                targetTable = (Table)destinationNode.TreeView.Parent;
                if (sourceTableName.Equals(destinationTableName))
                {
                    e.Effect = DragDropEffects.None;
                    return;
                }
                //Debug.WriteLine("drag from : " + sourceNode.Text);
                //Debug.WriteLine("drag from table: " + sourceNode.TreeView.Parent.Name);
                Debug.WriteLine("Drop at: " + destinationNode.Text);
                Debug.WriteLine("Drop at table: " + (sender as TreeView).Parent.Name);

                ///drawing line
                FormJoin frm = (FormJoin)destinationNode.TreeView.Parent.Parent.Parent.Parent.Parent.Parent;
                Relationship rel = new Relationship();
                rel.From = sourceTable;
                rel.SrcPoint = start;
                rel.SrcOffset = sourceNode.TreeView.PointToClient(new Point(e.X, e.Y));
                rel.To = targetTable;
                rel.TargetPoint = end;

                rel.TargetOffset = destinationNode.TreeView.PointToClient(new Point(e.X, e.Y));
                rel.FromColumn = sourceNode.Text;
                rel.ToColumn = destinationNode.Text;
                frm.onCallback(rel);
            }
        }
コード例 #2
0
ファイル: FormJoin.cs プロジェクト: ngunhaSO/QueryBuilder
 public void onCallback(Relationship rel)
 {
     this.relationship.Add(rel);
     this.panel1.Invalidate();
 }