Delegate PlaceholderPainter

Namespace: Egami.Drawing

Assembly: Egami.Drawing.dll

Draws a placeholder's content where DrawTextLayout(TextLayout, Vector2, RectF?, PlaceholderPainter?) left room for it.

public delegate void PlaceholderPainter(Canvas canvas, int index, RectF box)

Parameters

canvas Canvas: The canvas being drawn on.
index int: The placeholder's index in the rich text.
box RectF: The placeholder's box, in the canvas's local coordinates.

Examples

ParagraphStyle style = new()
{
    DefaultStyle = new TextStyle
    {
        FontFamilies = [family],
        Size = 18,
        Color = new Rgba8(30, 30, 60, 255),
        Shadows = [new TextShadow(new System.Numerics.Vector2(1, 1), 2, new Rgba8(0, 0, 0, 80))],
    },
    Align = TextAlign.Justify,
};

// One call: wrap into a box, centred across the lines.
TextLayout boxed = canvas.DrawText("Paragraphs wrap, justify and drop shadows.", new RectF(10, 10, 300, 80), style, VerticalAlign.Center);

// Or lay out once and draw where needed, skipping lines outside the visible part.
TextLayout layout = Paragraph.Create("Laid out once, drawn many times.", style).Layout(300);
canvas.DrawTextLayout(layout, new System.Numerics.Vector2(10, 110), visibleRect: new RectF(0, 0, 320, 200));

// Inline placeholders (an icon, a badge) are drawn by a painter called with each one's box.
canvas.DrawTextLayout(layout, new System.Numerics.Vector2(10, 130), placeholderPainter: (c, index, box) => c.FillRoundRect(new RoundRect(box, 3), new Rgba8(200, 60, 40, 255)));

// The same text as one path: glyphs and decorations.
Egami.Drawing.Path outline = layout.ToPath(new System.Numerics.Vector2(10, 150));

Table of Contents

Delegate PlaceholderPainter

Parameters

Examples