wehub-resource-sync
119 lines
3.9 KiB
C#
119 lines
3.9 KiB
C#
#nullable enable
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using ImGuiNET;
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using T3.Core.DataTypes.Vector;
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using T3.Core.Utils;
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namespace T3.Editor.Gui.UiHelpers;
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internal static class CustomImguiDraw
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{
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private static readonly int[] _wrapLineIndices = new int[10];
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// The method now accepts a Span of ReadOnlySpans for the wrapped lines to avoid allocations
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public static void AddWrappedCenteredText(ImDrawListPtr dl,
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string text,
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Vector2 position,
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int wrapCharCount,
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Color color,
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float verticalAlign = 0.5f)
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{
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var len = text.Length;
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var current = 0;
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var count = 0;
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while (current < len && count < _wrapLineIndices.Length)
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{
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var lineEnd = current + wrapCharCount;
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if (lineEnd >= len)
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{
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_wrapLineIndices[count++] = current;
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break;
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}
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var wrapPoint = lineEnd;
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// search for a valid line break
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var foundBreak = false;
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for (var i = lineEnd; i > current; i--)
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{
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var c = text[i - 1]; // ← look at the preceding character
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if (IsBreakChar(c))
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{
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wrapPoint = i; // break AFTER this character
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foundBreak = true;
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break;
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}
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}
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// if no reasonable break found → hard wrap
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if (!foundBreak)
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wrapPoint = lineEnd;
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_wrapLineIndices[count++] = current;
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current = wrapPoint;
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}
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var lineHeight = ImGui.GetTextLineHeight();
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var totalHeight = lineHeight * count;
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var yStart = position.Y - totalHeight * verticalAlign;
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for (var i = 0; i < count; i++)
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{
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var start = _wrapLineIndices[i];
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var end = (i + 1 < count) ? _wrapLineIndices[i + 1] : len;
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var line = text.AsSpan(start, end - start);
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var w = ImGui.CalcTextSize(line).X;
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var xStart = position.X - w * 0.5f;
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dl.AddText(new Vector2(xStart, yStart + i * lineHeight), color, line);
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}
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return;
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// ---------------------------------------------------------
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// local helper
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// ---------------------------------------------------------
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static bool IsBreakChar(char c)
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{
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// break AFTER whitespace or punctuation
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return char.IsWhiteSpace(c)
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|| c == '-'
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|| c == ','
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|| c == '.'
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|| c == ';'
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|| c == ':'
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|| c == '!'
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|| c == '?';
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}
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}
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private static readonly Vector2[] _pointsForNgon = new Vector2[MaxNgonCorners];
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private const int MaxNgonCorners = 8;
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public static void AddNgonRotated(this ImDrawListPtr dl, Vector2 center, float radius, uint color, bool filled = true, int count = 6,
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float startAngle = -MathF.PI / 2f)
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{
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count = count.ClampMax(MaxNgonCorners);
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for (var i = 0; i < count; i++)
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{
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var a = startAngle + i * (2 * MathF.PI / count);
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_pointsForNgon[i] = new Vector2(
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center.X + MathF.Cos(a) * radius,
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center.Y + MathF.Sin(a) * radius
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);
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}
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if (filled)
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{
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dl.AddConvexPolyFilled(ref _pointsForNgon[0], count, color);
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}
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else
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{
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dl.AddPolyline(ref _pointsForNgon[0], count, color, ImDrawFlags.Closed, 2);
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}
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}
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} |