/// <summary>
/// Draws the indicator's glyph in an editor view margin.
/// </summary>
/// <param name="context">The <see cref="TextViewDrawContext"/> to use for rendering.</param>
/// <param name="viewLine">The <see cref="ITextViewLine"/> for which the glyph is rendered.</param>
/// <param name="tagRange">The <see cref="ITag"/> and the range it covers.</param>
/// <param name="bounds">The bounds in which the indicator will be rendered.</param>
public override void DrawGlyph(TextViewDrawContext context, ITextViewLine viewLine, TagSnapshotRange <IIndicatorTag> tagRange, Rect bounds)
{
var diameter = Math.Max(8.0, Math.Min(13, Math.Round(Math.Min(bounds.Width, bounds.Height) - 2.0)));
var x = bounds.X + (bounds.Width - diameter) / 2.0;
var y = bounds.Y + (bounds.Height - diameter) / 2.0;
context.FillEllipse(new Rect(x, y, diameter, diameter), Color.FromArgb(0xff, 0x8a, 0xf3, 0x82));
context.DrawEllipse(new Rect(x, y, diameter, diameter), Color.FromArgb(0xff, 0x00, 0x40, 0x00), LineKind.Solid, 1);
}
/////////////////////////////////////////////////////////////////////////////////////////////////////
// NON-PUBLIC PROCEDURES
/////////////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Occurs when the highlight adornment needs to be drawn.
/// </summary>
/// <param name="context">The <see cref="TextViewDrawContext"/> to use for rendering.</param>
/// <param name="adornment">The <see cref="IAdornment"/> to draw.</param>
private void OnDrawHighlightAdornment(TextViewDrawContext context, IAdornment adornment)
{
var tag = adornment.Tag as ColorPreviewTag;
if (tag != null)
{
// Get the adornment bounds within the text area, accounting for scroll state
var bounds = new Rect(
context.TextAreaBounds.X + adornment.Location.X - context.View.ScrollState.HorizontalAmount,
context.TextAreaBounds.Y + adornment.Location.Y + adornment.Size.Height - ColorPreviewHeight,
adornment.Size.Width,
ColorPreviewHeight
);
context.FillRectangle(bounds, tag.Color);
}
}
/////////////////////////////////////////////////////////////////////////////////////////////////////
// PUBLIC PROCEDURES
/////////////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Draws the margin and its content.
/// </summary>
/// <param name="context">The <see cref="TextViewDrawContext"/> to use for rendering.</param>
public void Draw(TextViewDrawContext context)
{
Rect marginBounds = context.Bounds;
// Loop through all the view lines
ITextViewLineCollection visibleLines = view.VisibleViewLines;
foreach (ITextViewLine viewLine in visibleLines)
{
// Get bounds relative to this element
Rect bounds = view.TransformFromTextArea(viewLine.Bounds);
// Get the number of characters on the line
string characterCount = viewLine.CharacterCount.ToString(CultureInfo.CurrentCulture) + " chars";
// Get the foreground
var foreground = Colors.Black;
if (viewLine.CharacterCount > 60)
{
foreground = Colors.Red;
}
else if (viewLine.CharacterCount > 40)
{
foreground = Colors.DarkGoldenrod;
}
else if (viewLine.CharacterCount > 20)
{
foreground = Colors.DarkGreen;
}
// Get the line layout
var firstLayoutLine = context.Canvas.CreateTextLayout(characterCount, 0, this.FontFamily.Source, (float)this.FontSize, foreground).Lines[0];
// Get x/y
double x = marginBounds.Right - firstLayoutLine.Width - this.Padding.Right;
double y = marginBounds.Y + viewLine.TextBounds.Y + (int)Math.Round(viewLine.Baseline - firstLayoutLine.Baseline, MidpointRounding.AwayFromZero);
// Draw the text
context.DrawText(new Point(x, y), firstLayoutLine);
}
}
/////////////////////////////////////////////////////////////////////////////////////////////////////
// PUBLIC PROCEDURES
/////////////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Draws the margin and its content.
/// </summary>
/// <param name="context">The <see cref="TextViewDrawContext"/> to use for rendering.</param>
public void Draw(TextViewDrawContext context)
{
// NOTE: This margin is rendered via XAML but could be drawn here instead if desired
}
/// <summary>
/// Occurs when the adornment needs to be drawn.
/// </summary>
/// <param name="context">The <see cref="TextViewDrawContext"/> to use for rendering.</param>
/// <param name="adornment">The <see cref="IAdornment"/> to draw.</param>
private void OnDrawAdornment(TextViewDrawContext context, IAdornment adornment)
{
var color = Color.FromArgb(0x20, 0x80, 0x80, 0x80);
context.FillRectangle(new Rect(adornment.Location, adornment.Size), color);
}
