private void lbSymbols_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
SymbolCollectionItem item = null;
for (int i = 0; i < lbSymbols.Items.Count; i++)
{
Rectangle rect = lbSymbols.GetItemRectangle(i);
if (rect.Y <= e.Y && (rect.Y + rect.Height) >= e.Y)
{
item = (SymbolCollectionItem)lbSymbols.Items[i];
break;
}
}
if (item == null)
{
return;
}
_mouseDownItem = item;
if (e.X < 20)
{
item.Visible = !item.Visible;
DrawPreview();
}
}
private void lbSymbols_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
{
if (_mouseOverItem != null &&
_mouseDownItem != null &&
_mouseOverItem != _mouseDownItem)
{
_symbol.RemoveSymbol(_mouseDownItem.Symbol);
_symbol.InsertBefore(_mouseDownItem.Symbol, _mouseOverItem.Symbol, _mouseDownItem.Visible);
buildList();
_mouseOverItem = _mouseDownItem = null;
}
}
private void lbSymbols_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
_mX = e.X;
_mY = e.Y;
if (e.Button == MouseButtons.Left && lbSymbols.SelectedIndices.Count > 0 && _mouseDownItem != null)
{
SymbolCollectionItem item = null;
Rectangle rect = new Rectangle(0, 0, 0, 0);
for (int i = 0; i < lbSymbols.Items.Count; i++)
{
rect = lbSymbols.GetItemRectangle(i);
//if(rect==null) continue;
if (rect.Y <= e.Y && (rect.Y + rect.Height) >= e.Y)
{
item = (SymbolCollectionItem)lbSymbols.Items[i];
break;
}
}
if (item == null)
{
return;
}
_mouseOverItem = item;
System.Drawing.Graphics gr = System.Drawing.Graphics.FromHwnd(lbSymbols.Handle);
Pen pen = new Pen(Color.Blue, 2);
gr.DrawLine(pen, rect.Left, rect.Top, rect.Width, rect.Top);
if (_rect != rect)
{
pen.Color = lbSymbols.BackColor;
gr.DrawLine(pen, _rect.Left, _rect.Top, _rect.Width, _rect.Top);
_rect = rect;
}
pen.Dispose(); pen = null;
gr.Dispose(); gr = null;
}
}
