/// <summary>
/// Invalidates <see cref="FormattedText"/>.
/// </summary>
protected void InvalidateFormattedText()
{
if (_formattedText != null)
{
_constraint = _formattedText.Constraint;
_formattedText.Dispose();
_formattedText = null;
}
InvalidateMeasure();
}
/// <summary>
///
/// </summary>
/// <param name="dc"></param>
/// <param name="text"></param>
/// <param name="dx"></param>
/// <param name="dy"></param>
/// <param name="db"></param>
/// <param name="r"></param>
public void Draw(object dc, XText text, double dx, double dy, ImmutableArray <ShapeProperty> db, Record r)
{
var _gfx = dc as DrawingContext;
var tbind = text.BindToTextProperty(db, r);
if (string.IsNullOrEmpty(tbind))
{
return;
}
Brush brush = ToSolidBrush(text.Style.Stroke);
var fontStyle = Perspex.Media.FontStyle.Normal;
if (text.Style.TextStyle.FontStyle.Flags.HasFlag(FontStyleFlags.Italic))
{
fontStyle |= Perspex.Media.FontStyle.Italic;
}
var fontWeight = Perspex.Media.FontWeight.Normal;
if (text.Style.TextStyle.FontStyle.Flags.HasFlag(FontStyleFlags.Bold))
{
fontWeight |= Perspex.Media.FontWeight.Bold;
}
// TODO: Implement font decoration after Perspex adds support for them.
/*
* var fontDecoration = Perspex.Media.FontDecoration.None;
* if (text.Style.TextStyle.FontStyle.Flags.HasFlag(FontStyleFlags.Underline))
* {
* fontDecoration |= Perspex.Media.FontDecoration.Underline;
* }
*
* if (text.Style.TextStyle.FontStyle.Flags.HasFlag(FontStyleFlags.Strikeout))
* {
* fontDecoration |= Perspex.Media.FontDecoration.Strikethrough;
* }
*/
var ft = new FormattedText(
tbind,
text.Style.TextStyle.FontName,
text.Style.TextStyle.FontSize * _textScaleFactor,
fontStyle,
TextAlignment.Left,
fontWeight);
var rect = CreateRect(
text.TopLeft,
text.BottomRight,
dx, dy);
var size = ft.Measure();
var origin = GetTextOrigin(text.Style, ref rect, ref size);
_gfx.DrawText(brush, origin, ft);
// TODO: brush.Dispose();
ft.Dispose();
}
void UpdateText(int fps)
{
_text?.Dispose();
_text = new FormattedText("FPS: " + fps, "Arial", 15, FontStyle.Normal, TextAlignment.Left,
FontWeight.Normal);
}
