/// <summary>
/// Draw the entity.
/// </summary>
/// <param name="spriteBatch">Sprite batch to draw on.</param>
override protected void DrawEntity(SpriteBatch spriteBatch)
{
// if size changed, update paragraphs list
if ((_prevSize.Y != _destRectInternal.Size.Y) || _hadResizeWhileNotVisible)
{
OnResize();
}
// store last known size
_prevSize = _destRectInternal.Size;
// call base draw function to draw the panel part
base.DrawEntity(spriteBatch);
// update paragraphs list values
for (int i = 0; i < _paragraphs.Count; ++i)
{
// if paragraph is within items range:
int item_index = i + (int)_scrollbar.Value;
if (item_index < _list.Count)
{
// set paragraph text, make visible, and remove background.
_paragraphs[i].Text = _list[item_index];
_paragraphs[i].Background = null;
_paragraphs[i].Visible = true;
// set locked state
bool isLocked = false;
LockedItems.TryGetValue(item_index, out isLocked);
_paragraphs[i].Locked = isLocked;
}
// if paragraph out of range (eg more paragraphs than list items), make this paragraph invisible.
else
{
_paragraphs[i].Visible = false;
_paragraphs[i].Text = string.Empty;
}
}
// highlight the currently selected item paragraph (eg the paragraph that represent the selected value, if currently visible)
int selectedParagraphIndex = _index;
if (selectedParagraphIndex != -1)
{
int i = selectedParagraphIndex - _scrollbar.Value;
if (i >= 0 && i < _paragraphs.Count)
{
// add background to selected paragraph
Paragraph paragraph = _paragraphs[i];
Rectangle destRect = paragraph.GetActualDestRect();
Vector2 size = new Vector2(0, destRect.Height * 1.35f / UserInterface.Active.GlobalScale);
paragraph.State = EntityState.MouseDown;
paragraph.Padding = new Vector2(-Padding.X, 0);
paragraph.CalcDestRect();
paragraph.CalcInternalRect();
ColoredRectangle selectMark = new ColoredRectangle(GetActiveStyle("SelectedHighlightColor").asColor, size, Anchor.TopCenter, new Vector2(0, -4));
paragraph.Background = selectMark;
}
}
}
/// <summary>
/// Prepare the input paragraph for display.
/// </summary>
/// <param name="usePlaceholder">If true, will use the placeholder text. Else, will use the real input text.</param>
/// <param name="showCaret">If true, will also add the caret text when needed. If false, will not show caret.</param>
/// <returns>Processed text that will actually be displayed on screen.</returns>
protected string PrepareInputTextForDisplay(bool usePlaceholder, bool showCaret)
{
// set main paragraph text and add caret mark if needed
string caretShow = showCaret ? ((int)_caretAnim % 2 == 0) ? "|" : " " : "";
TextParagraph.Text = _value.Insert(_caret >= 0 ? _caret : _value.Length, caretShow);
// update placeholder text
PlaceholderParagraph.Text = _placeholderText;
// get current paragraph and prepare to draw
Paragraph currParagraph = usePlaceholder ? PlaceholderParagraph : TextParagraph;
TextParagraph.CalcDestRect();
TextParagraph.PrepareForDraw();
// get text to display
return(currParagraph.GetProcessedText());
}
/// <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;
}
}
}
