/// <summary>
/// Move scrollbar to show caret position.
/// </summary>
public void ScrollToCaret()
{
// skip if no scrollbar
if (_scrollbar == null)
{
return;
}
// make sure caret position is legal
if (_caret >= _value.Length)
{
_caret = -1;
}
// if caret is at end of text jump to it
if (_caret == -1)
{
_scrollbar.Value = (int)_scrollbar.Max;
}
// if not try to find the right pos
else
{
TextParagraph.Text = _value;
TextParagraph.PrepareForDraw();
string processedValueText = TextParagraph.GetProcessedText();
int currLine = processedValueText.Substring(0, _caret).Split('\n').Length;
_scrollbar.Value = currLine - 1;
}
}
/// <summary>
/// When list is resized (also called on init), create the labels to show item values and init graphical stuff.
/// </summary>
/// <param name="recalcDestRect">If true, will also recalculate destination rectangle.</param>
protected virtual void OnResize(bool recalcDestRect = true)
{
// store current size
_prevSize = _size;
// remove all children before re-creating them
ClearChildren();
// remove previous paragraphs list
_paragraphs.Clear();
// calculate self destination rect
if (recalcDestRect)
{
_destRect = CalcDestRect();
}
// calculate paragraphs quantity
int i = 0;
while (true)
{
// create and add new paragraph
Paragraph paragraph = new Paragraph(".", Anchor.Auto, new Vector2(0, 40));
// note: we set negative padding for the selected mark size so it won't be negative size
paragraph.WrapWords = false;
paragraph.UpdateStyle(DefaultParagraphStyle);
paragraph.Scale = paragraph.Scale * ItemsScale;
paragraph.SpaceAfter = paragraph.SpaceAfter + new Vector2(0, ExtraSpaceBetweenLines);
paragraph.AttachedData = new ParagraphData(this, i++);
paragraph.UseActualSizeForCollision = false;
AddChild(paragraph);
_paragraphs.Add(paragraph);
OnCreatedListParagraph(paragraph);
// add callback to selection
paragraph.OnClick = (Entity entity) =>
{
ParagraphData data = (ParagraphData)entity.AttachedData;
if (!data.list.LockSelection)
{
data.list.Select(data.relativeIndex, true);
}
};
// to calculate paragraph actual bottom
paragraph.CalcDestRect();
paragraph.PrepareForDraw();
// if out of list bounderies remove this paragraph and stop
if ((paragraph.GetActualDestRect().Bottom > _destRect.Bottom - Padding.Y) || i > _list.Count)
{
RemoveChild(paragraph);
_paragraphs.Remove(paragraph);
break;
}
}
// add scrollbar last, but only if needed
if (_paragraphs.Count < _list.Count)
{
// add scrollbar to list
AddChild(_scrollbar, false);
// calc max scroll value
_scrollbar.Max = (uint)(_list.Count - _paragraphs.Count);
if (_scrollbar.Max < 2)
{
_scrollbar.Max = 2;
}
_scrollbar.StepsCount = _scrollbar.Max;
_scrollbar.Visible = true;
}
// if no scrollbar is needed, hide it
else
{
_scrollbar.Visible = false;
if (_scrollbar.Value > 0)
{
_scrollbar.Value = 0;
}
}
}
