protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
if (m_Words == null || !m_Words.Any())
{
return;
}
if (m_Layout == null)
{
return;
}
IEnumerable <LayoutItem> wordsToRedraw = m_Layout.GetWordsInArea(e.ClipRectangle);
using (IGraphicEngine graphicEngine =
NewGraphicEngine(e.Graphics, this.Font.FontFamily, FontStyle.Regular, m_Palette, MinFontSize, MaxFontSize, m_MinWordWeight, m_MaxWordWeight))
{
foreach (LayoutItem currentItem in wordsToRedraw)
{
if (m_ItemUnderMouse == currentItem)
{
graphicEngine.DrawEmphasized(currentItem);
}
else
{
graphicEngine.Draw(currentItem);
}
}
}
}
/// <inheritdoc cref="ILayout"/>
/// <summary>
/// Arranges the words on the graphics engine.
/// </summary>
/// <param name="words">The words.</param>
/// <param name="graphicEngine">The graphics engine.</param>
/// <returns>The word count.</returns>
/// <seealso cref="ILayout"/>
public int Arrange(IEnumerable <IWord> words, IGraphicEngine graphicEngine)
{
if (words == null)
{
throw new ArgumentNullException(nameof(words));
}
var enumerable = words as IWord[] ?? words.ToArray();
if (enumerable.First() == null)
{
return(0);
}
foreach (var word in enumerable)
{
var size = graphicEngine.Measure(word.Text, word.Occurrences);
if (!this.TryFindFreeRectangle(size, out var freeRectangle))
{
break;
}
var item = new LayoutItem(freeRectangle, word);
this.QuadTree.Insert(item);
graphicEngine.Draw(item);
}
return(this.QuadTree.Count);
}
/// <summary>
/// Draws the word cloud into <see
/// cref="IGraphicEngine{TBitmap}.Bitmap"/>.
/// </summary>
public TBitmap Draw()
{
return(Process((engine, items) =>
{
// Draw words.
foreach (var item in items)
{
engine.Draw(item.Location, item.Measured, item.Entry.Word, item.Entry.Count);
}
return engine.Bitmap;
}));
}