private void clearDrag()
{
if (ndDrop != null)
{
ndDrop.BackColor = System.Drawing.Color.White;
ndDrop = null;
}
dragData = null;
}
private void btIndex_Click(object sender, System.EventArgs e)
{
TableNode nd = treeView1.SelectedNode as TableNode;
if (nd != null)
{
dlgIndexes dlg = new dlgIndexes();
dlg.LoadData(nd.table, qry.DatabaseConnection.ConnectionObject);
dlg.ShowDialog(this);
if (dlg.bChanged)
{
nd.table.GetIndexes(qry.DatabaseConnection.ConnectionObject);
}
}
}
/*
* For MySQL
* CREATE TABLE child_table(
* foo INT
* ,bar INT
* ,FOREIGN KEY (bar) REFERENCES parent_table(parent_key)
* ON UPDATE CASCADE ON DELETE SET NULL
*/
private void treeView1_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)
{
try
{
bool bCanDrop = false;
System.Drawing.Point pt = new System.Drawing.Point(e.X, e.Y);
pt = treeView1.PointToClient(pt);
TableNode nd = (TableNode)treeView1.GetNodeAt(pt);
if (dragData != null && nd != null)
{
if (nd.Parent == null)
{
if (nd != dragData.objNode)
{
//nd must have unique key and cannot be a child of dragData
if (nd.table.HasUniqueKey())
{
bCanDrop = !schema.RelationExists(nd.table.TableName, dragData.objNode.table.TableName);
}
}
if (bCanDrop)
{
dlgSetRelation dlg = new dlgSetRelation();
dlg.LoadData(nd.table, dragData.objNode.table, qry.DatabaseConnection.ConnectionObject);
if (dlg.ShowDialog(this) == System.Windows.Forms.DialogResult.OK)
{
schema.dbCon = qry.DatabaseConnection.ConnectionObject;
schema.LoadSchema();
this.loadTables();
}
}
}
}
}
catch (Exception er)
{
MessageBox.Show(this, VPLUtil.FormExceptionText(er), this.Text, MessageBoxButtons.OK, MessageBoxIcon.Error);
}
finally
{
clearDrag();
}
}
private void treeView1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
if ((e.Button & MouseButtons.Left) == MouseButtons.Left && bMouseDown)
{
bMouseDown = false;
//start drag group for re-grouping
System.Drawing.Point pt = new System.Drawing.Point(e.X, e.Y);
TableNode nd = (TableNode)treeView1.GetNodeAt(pt);
if (nd != null)
{
treeView1.SelectedNode = nd;
dragData = new clsDragTableData();
dragData.objNode = nd;
System.Windows.Forms.DragDropEffects ret = treeView1.DoDragDrop(dragData, System.Windows.Forms.DragDropEffects.All);
if (ret == System.Windows.Forms.DragDropEffects.Move)
{
}
}
}
}
private void btDelField_Click(object sender, System.EventArgs e)
{
TableNode nd = treeView1.SelectedNode as TableNode;
int n = cbxFields.SelectedIndex;
if (nd != null && n >= 0)
{
try
{
EPField fld = (EPField)cbxFields.Items[n];
string s = fld.Name + "\r\n";
s += Resource1.askDeleteField;
if (MessageBox.Show(this, s, this.Text, System.Windows.Forms.MessageBoxButtons.YesNo, System.Windows.Forms.MessageBoxIcon.Question) == System.Windows.Forms.DialogResult.Yes)
{
qry.DatabaseConnection.ConnectionObject.DropColumn(nd.Text, fld.Name);
nd.table.GetFields(qry.DatabaseConnection.ConnectionObject);
nd.table.GetIndexes(qry.DatabaseConnection.ConnectionObject);
treeView1_AfterSelect(null, null);
if (n < cbxFields.Items.Count)
{
cbxFields.SelectedIndex = n;
}
else
{
if (cbxFields.Items.Count > 0)
{
cbxFields.SelectedIndex = cbxFields.Items.Count - 1;
}
}
}
}
catch (Exception er)
{
MessageBox.Show(this, VPLUtil.FormExceptionText(er), this.Text, MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
}
private void treeView1_DragOver(object sender, System.Windows.Forms.DragEventArgs e)
{
bool bCanDrop = false;
System.Drawing.Point pt = new System.Drawing.Point(e.X, e.Y);
pt = treeView1.PointToClient(pt);
TableNode nd = (TableNode)treeView1.GetNodeAt(pt);
if (dragData != null && nd != null)
{
//nd to be parent, must be top node
if (nd.Parent == null)
{
if (nd != dragData.objNode)
{
//nd must have unique key cannot be a child of dragData
if (nd.table.HasUniqueKey())
{
bCanDrop = !schema.RelationExists(nd.table.TableName, dragData.objNode.table.TableName);
}
}
if (bCanDrop)
{
e.Effect = DragDropEffects.Copy | DragDropEffects.Move;
if (ndDrop != nd)
{
if (ndDrop != null)
{
ndDrop.BackColor = System.Drawing.Color.White;
}
}
ndDrop = nd;
ndDrop.BackColor = System.Drawing.Color.GreenYellow;
}
}
}
if (!bCanDrop)
{
if (ndDrop != null)
{
ndDrop.BackColor = System.Drawing.Color.White;
ndDrop = null;
}
}
//scroll up/down
int nDltX, nDltY;
if (pt.Y < treeView1.ItemHeight)
{
//scroll up
nDltY = pt.Y - y0;
if (nDltY < 0)
{
nDltY = -nDltY;
}
nDltX = pt.X - x0;
if (nDltX < 0)
{
nDltX = -nDltX;
}
if (nDltX < nDltY)
{
nDltX = nDltY;
}
if (nDltX > nDeltaDragMove)
{
y0 = pt.Y;
x0 = pt.X;
nd = (TableNode)treeView1.TopNode;
//find the first invisible node
TreeNode nd1;
while (nd != null)
{
nd1 = FindInvisibleNodeUp(nd);
if (nd1 != null)
{
nd1.EnsureVisible();
break;
}
nd = (TableNode)nd.Parent;
}
}
}
else if (pt.Y > treeView1.ClientSize.Height - treeView1.ItemHeight)
{
//scroll down
nDltY = pt.Y - y0;
if (nDltY < 0)
{
nDltY = -nDltY;
}
nDltX = pt.X - x0;
if (nDltX < 0)
{
nDltX = -nDltX;
}
if (nDltX < nDltY)
{
nDltX = nDltY;
}
if (nDltX > nDeltaDragMove)
{
y0 = pt.Y;
x0 = pt.X;
nd = (TableNode)treeView1.GetNodeAt(pt);
if (nd != null)
{
nd = (TableNode)FindInvisibleNodeDn(nd);
}
if (nd != null)
{
nd.EnsureVisible();
}
}
}
///
}
private void treeView1_AfterSelect(object sender, System.Windows.Forms.TreeViewEventArgs e)
{
btDelChild.Enabled = false;
cbxFields.Items.Clear();
TableNode nd = treeView1.SelectedNode as TableNode;
if (nd != null)
{
try
{
int i;
btDelChild.Enabled = (nd.Parent != null);
//
if (!nd.FieldsLoaded)
{
nd.FieldsLoaded = true;
nd.table.GetFields(schema.dbCon);
nd.table.GetIndexes(schema.dbCon);
}
for (i = 0; i < nd.table.FieldCount; i++)
{
cbxFields.Items.Add(nd.table.GetField(i));
}
//check unique index
bool bIndexed = false;
for (i = 0; i < nd.table.FieldCount; i++)
{
if (nd.table.GetField(i).Indexed)
{
bIndexed = true;
break;
}
}
if (!bIndexed)
{
if (nd.table.Indexes != null)
{
for (i = 0; i < nd.table.Indexes.Length; i++)
{
if (nd.table.Indexes[i].IsUnique)
{
for (int j = 0; j < nd.table.Indexes[i].fields.Count; j++)
{
nd.table.fields[nd.table.Indexes[i].fields[i].Name].Indexed = true;
}
break;
}
}
}
}
//
dataGrid1.Refresh();
dataGrid1.DataBindings.Clear();
dataGrid1.DataSource = null;
dataGrid1.DataMember = null;
//
qry.ClearQuery();
//
dataGrid1.Refresh();
dataGrid1.Name = nd.Text;
//create a query for the table
qry.UpdatableTableName = nd.Text;
qry.Description = nd.Text;
qry.SampleTopRec = nd.TopRec;
qry.UseSampleTopRec = true;
if (qry.DatabaseConnection.TopRecordStyle == EnumTopRecStyle.NotAllowed)
{
qry.Where = "1=2";
}
else
{
qry.Where = "";
}
qry.From = string.Format(CultureInfo.InvariantCulture,
"{0}{1}{2}", qry.NameDelimiterBegin, nd.Text, qry.NameDelimiterEnd);
FieldList fl = new FieldList();
for (i = 0; i < nd.table.FieldCount; i++)
{
fl.AddField(nd.table.GetField(i));
}
for (i = 0; i < fl.Count; i++)
{
fl[i].SetDefaultEditor();
}
qry.Fields = fl;
qry.Query();
//
dataGrid1.DataSource = qry.DataStorage;
if (qry.DataStorage != null)
{
dataGrid1.DataMember = qry.DataStorage.Tables[0].TableName;
}
dataGrid1.Refresh();
//
schema.dbCon = qry.DatabaseConnection.ConnectionObject;
dataGrid1_CurrentCellChanged(null, null);
dlgDatabase_Resize(null, null);
dataGrid1.Visible = (qry.Fields.Count > 0);
if (cbxFields.Items.Count > 0)
{
cbxFields.SelectedIndex = 0;
}
}
catch (Exception err)
{
MessageBox.Show(this, VPLUtil.FormExceptionText(err), this.Text, System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Stop);
}
}
}
