Krile.Common.Suggestor.SuggestableTextBox.ProcessStartSuggest.cs

        private void ProcessStartSuggest(string text, int selectedStart)
        {
            if (String.IsNullOrEmpty(text) || selectedStart > text.Length || selectedStart < 1)
                return;
            System.Diagnostics.Debug.Assert(text != null, "Text is null.");
            foreach (var c in SuggestCandidates)
            {
                if (text[selectedStart - 1] == c)
                {
                    targetStart = selectedStart;
                    //Start suggest
                    Point displayOffset = this.GetPositionFromCharIndex(selectedStart);
                    //Get line height
                    int curLine = this.GetLineFromCharIndex(selectedStart);
                    float lineHeight = 0.0f;
                    System.Diagnostics.Debug.Assert(this.Font != null, "Font is null.");
                    switch (this.Font.Unit)
                    {
                        case GraphicsUnit.Display:
                        case GraphicsUnit.Pixel:
                            lineHeight = this.Font.Size;
                            break;
                        case GraphicsUnit.Document:
                            lineHeight = this.Font.Size / 300.0f * dpiY;
                            break;
                        case GraphicsUnit.Inch:
                            lineHeight = this.Font.Size * dpiY;
                            break;
                        case GraphicsUnit.Point:
                            lineHeight = this.Font.Size / 72.0f * dpiY;
                            break;
                        default:
                            throw new NotSupportedException("Unit " + this.Font.Unit.ToString() + " is not supported.");
                    }
                    System.Diagnostics.Debug.Assert(displayOffset != null, "DispOffset is null.");
                    //set display offset
                    displayOffset.Y += (int)Math.Ceiling(lineHeight);
                    sug = GetList(c, targetStart, this.PointToScreen(displayOffset));
                    if (sug == null)
                        return;

                    System.Diagnostics.Debug.Assert(sug != null, "Suggestor is null.");
                    sug.OnApplied += new Action(sug_OnApplied);
                    
                    //親コントロールを探す
                    Control parent = this.Parent;
                    Form pf = null;
                    
                    while (parent != null && (pf = parent as Form) == null)
                        parent = parent.Parent;

                    if (pf != null)
                        pf.AddOwnedForm(sug);

                    sug.Show();
                    this.Focus();
                    prevHit = c;
                    break;
                }
            }
        }