protected override void OnPaint(PaintEventArgs e)
{
if (target == null)
{
return;
}
Point car = PointToClient(target.PointToScreen(target.PlaceToPoint(target.Selection.Start)));
Size fontSize = TextRenderer.MeasureText("W", Font);
int column = 0;
e.Graphics.FillRectangle(new LinearGradientBrush(new Rectangle(0, 0, Width, Height), BackColor, BackColor2, 270), new Rectangle(0, 0, Width, Height));
float columnWidth = target.CharWidth;
var sf = new StringFormat();
sf.Alignment = StringAlignment.Center;
sf.LineAlignment = StringAlignment.Near;
var zeroPoint = target.PositionToPoint(0);
zeroPoint = PointToClient(target.PointToScreen(zeroPoint));
using (var pen = new Pen(TickColor))
using (var textBrush = new SolidBrush(ForeColor))
{
for (float x = zeroPoint.X; x < Right; x += columnWidth, ++column)
{
if (column % 10 == 0)
{
e.Graphics.DrawString(column.ToString(), Font, textBrush, x, 0f, sf);
}
e.Graphics.DrawLine(pen, (int)x, fontSize.Height + (column % 5 == 0 ? 1 : 3), (int)x, Height - 4);
}
}
using (var pen = new Pen(TickColor))
{
e.Graphics.DrawLine(pen, new Point(car.X - 3, Height - 3), new Point(car.X + 3, Height - 3));
}
using (var pen = new Pen(CaretTickColor))
{
e.Graphics.DrawLine(pen, new Point(car.X - 2, fontSize.Height + 3), new Point(car.X - 2, Height - 4));
e.Graphics.DrawLine(pen, new Point(car.X, fontSize.Height + 1), new Point(car.X, Height - 4));
e.Graphics.DrawLine(pen, new Point(car.X + 2, fontSize.Height + 3), new Point(car.X + 2, Height - 4));
}
}
private void UpdateLocation()
{
if (null != tb)
{
int x = tb.Width - this.Width - 20;
this.Location = tb.PointToScreen(new Point(x, 0));
}
}
internal void DoAutocomplete(bool forced)
{
if (!Menu.Enabled)
{
Menu.Close();
return;
}
visibleItems.Clear();
FocussedItemIndex = 0;
VerticalScroll.Value = 0;
//some magic for update scrolls
AutoScrollMinSize += new Size(1, 0);
AutoScrollMinSize -= new Size(1, 0);
//get fragment around caret
Range fragment = tb.Selection.GetFragment(Menu.SearchPattern);
string text = fragment.Text;
//calc screen point for popup menu
Point point = tb.PlaceToPoint(fragment.End);
Point offset = tb.PointToScreen(point);
point = AutocompleteParent.PointToClient(offset);
point.Offset(2, tb.CharHeight);
//
bool foundSelected = false;
if (forced || (text.Length >= Menu.MinFragmentLength &&
tb.Selection.IsEmpty && /*pops up only if selected range is empty*/
(tb.Selection.Start > fragment.Start || text.Length == 0 /*pops up only if caret is after first letter*/)))
{
Menu.Fragment = fragment;
//build popup menu
foreach (var item in sourceItems)
{
item.Parent = Menu;
CompareResult res = item.Compare(text);
if (res != CompareResult.Hidden)
{
visibleItems.Add(item);
}
if (res == CompareResult.VisibleAndSelected && !foundSelected)
{
foundSelected = true;
FocussedItemIndex = visibleItems.Count - 1;
}
}
}
//show popup menu
if (Count > 0)
{
CancelEventArgs args = new CancelEventArgs();
Menu.OnOpening(args);
if (!args.Cancel)
{
Menu.Location = point;
Menu.Parent = AutocompleteParent;
if (foundSelected)
{
AdjustScroll();
DoSelectedVisible();
}
Menu.Show();
Menu.BringToFront();
}
Menu.Invalidate();
Invalidate();
}
else
{
Menu.Close();
}
}
