回答編集履歴

無駄コード

2026/01/31 23:11

投稿

TN8001

スコア10237

answer CHANGED Viewed

@@ -236,10 +236,12 @@
         //Drawing.DrawDebugRectangle(rp.Canvas, rp.Paint, panelRect, labelPoint, LabelFontColor);
         // 上にずらす座標計算（内側の軸から順に上に乗っていく仕様）
-        var axes = Edge == Edge.Left
+        var offsetY = 0f;
-            ? rp.Plot.Axes.GetAxes(Edge.Left).OfType<HorizontalLabelYAxis>().ToList()
+        foreach (var axes in rp.Plot.Axes.GetAxes(Edge).OfType<HorizontalLabelYAxis>())
-            : rp.Plot.Axes.GetAxes(Edge.Right).OfType<HorizontalLabelYAxis>().ToList();
+        {
-        var offsetY = axes.Take(axes.IndexOf(this) + 1).Sum(x => x.AxisLabelSize.Height);
+            offsetY += axes.AxisLabelSize.Height;
+            if (axes == this) break;
+        }
         LabelStyle.Render(rp.Canvas, labelPoint.MovedUp(offsetY), rp.Paint);
         DrawTicks(rp, TickLabelStyle, panelRect, TickGenerator.Ticks, this, MajorTickStyle, MinorTickStyle);

追記

2026/01/31 21:43

投稿

TN8001

スコア10237

answer CHANGED Viewed

@@ -83,15 +83,9 @@
         if (!Range.HasBeenSet) return SizeWhenNoData;
         float maxTickLabelWidth = TickGenerator.Ticks.Length > 0
-            ? TickGenerator.Ticks.Select(x => TickLabelStyle.Measure(x.Label, paint).Width).Max()
+            ? TickGenerator.Ticks.Select(x => TickLabelStyle.Measure(x.Label, paint).Width).Max() : 0;
-            : 0;
         // 軸上にラベルを表示するのでPaddingBetweenTickAndAxisLabelsは不要
-        //float axisLabelHeight = string.IsNullOrEmpty(LabelStyle.Text) && LabelStyle.Image is null
-        //    ? EmptyLabelPadding.Horizontal
-        //    : LabelStyle.Measure(LabelText, paint).Height
-        //    + PaddingBetweenTickAndAxisLabels.Horizontal
-        //    + PaddingOutsideAxisLabels.Horizontal;
         float axisLabelHeight = string.IsNullOrEmpty(LabelStyle.Text) && LabelStyle.Image is null
             ? EmptyLabelPadding.Horizontal
             : LabelStyle.Measure(LabelText, paint).Height
@@ -99,7 +93,6 @@
             + PaddingOutsideAxisLabels.Horizontal;
         // ラベルが軸の反対側に半分出るので1/2
-        //return maxTickLabelWidth + axisLabelHeight;
         return maxTickLabelWidth / 2 + axisLabelHeight;
     }
@@ -116,9 +109,7 @@
         LabelAlignment = Alignment.UpperCenter;
         LabelStyle.Render(rp.Canvas, labelPoint, rp.Paint);
-        //DrawTicks(rp, TickLabelStyle, panelRect, TickGenerator.Ticks, this, MajorTickStyle, MinorTickStyle);
         DrawTicks2(rp, TickLabelStyle, panelRect, TickGenerator.Ticks, this, MajorTickStyle, MinorTickStyle);
         DrawFrame(rp, panelRect, Edge, FrameLineStyle);
     }
@@ -134,10 +125,8 @@
             float tickLength = tick.IsMajor ? majorStyle.Length : minorStyle.Length;
             float yPx = axis.GetPixel(tick.Position, panelRect);
             float x = axis.Edge == Edge.Left ? panelRect.Right : panelRect.Left;
-            //float xEdge = axis.Edge == Edge.Left ? x - tickLength : x + tickLength;
             // 左右にtickLength分の線を引く
-            //PixelLine pxLine = new(x, yPx, xEdge, yPx);
             PixelLine pxLine = new(x - tickLength, yPx, x + tickLength, yPx);
             var lineStyle = tick.IsMajor ? majorStyle : minorStyle;
@@ -145,23 +134,117 @@
             if (string.IsNullOrWhiteSpace(tick.Label) || !label.IsVisible) continue;
             label.Text = tick.Label;
-            //float pxDistanceFromTick = 5;
-            //float pxDistanceFromEdge = tickLength + pxDistanceFromTick;
-            // 軸に重ねるので余計なオフセット計算なし
+            float xPx = x; // 軸に重ねるので余計なオフセット計算なし
-            //float xPx = axis.Edge == Edge.Left ? x - pxDistanceFromEdge : x + pxDistanceFromEdge;
-            float xPx = x;
             Pixel px = new(xPx, yPx);
             if (label.Rotation == 0)
-            {
-                // 何も気にせずMiddleCenterに描く
-                //label.Alignment = axis.Edge == Edge.Left ? Alignment.MiddleRight : Alignment.MiddleLeft;
-                label.Alignment = Alignment.MiddleCenter;
+                label.Alignment = Alignment.MiddleCenter; // 何も気にせずMiddleCenterに描く
-            }
             label.Render(rp.Canvas, px, paint);
         }
     }
 }
 ```
-![アプリ画像](https://ddjkaamml8q8x.cloudfront.net/questions/2026-01-30/1273532d-0f5f-4426-a91d-441a0dc71f5b.png)
+![アプリ画像](https://ddjkaamml8q8x.cloudfront.net/questions/2026-01-30/1273532d-0f5f-4426-a91d-441a0dc71f5b.png)
+---
+## 追記
+> Y軸の真上というのは、たとえば、示してくれたグラフでいうと"LeftAxis"の文字が、左のY軸の0.01の数字とForm1という文字の間に横書きで表示されて欲しいという意味でした。
+```cs
+using ScottPlot;
+using ScottPlot.AxisPanels;
+using ScottPlot.WinForms;
+namespace Qa3g98l2vj841kv;
+public partial class Form1 : Form
+{
+    public Form1()
+    {
+        InitializeComponent();
+        var formsPlot1 = new FormsPlot { Dock = DockStyle.Fill, Parent = this, };
+        formsPlot1.Plot.Title("Plot Title");
+        formsPlot1.Plot.Axes.Remove(formsPlot1.Plot.Axes.Left);
+        formsPlot1.Plot.Axes.AddLeftAxis(new HorizontalLabelYAxis(Edge.Left));
+        var sig1 = formsPlot1.Plot.Add.Signal(Generate.Sin(mult: 0.01));
+        sig1.Axes.YAxis = formsPlot1.Plot.Axes.Left;
+        formsPlot1.Plot.Axes.Left.Label.Text = "Left Axis";
+        formsPlot1.Plot.Axes.Left.Label.ForeColor = sig1.Color;
+        formsPlot1.Plot.Axes.Remove(formsPlot1.Plot.Axes.Right);
+        formsPlot1.Plot.Axes.AddRightAxis(new HorizontalLabelYAxis(Edge.Right));
+        var sig2 = formsPlot1.Plot.Add.Signal(Generate.Cos(mult: 100));
+        sig2.Axes.YAxis = formsPlot1.Plot.Axes.Right;
+        formsPlot1.Plot.Axes.Right.Label.Text = "Right Axisssssssssssssss";
+        formsPlot1.Plot.Axes.Right.Label.ForeColor = sig2.Color;
+        var sig3 = formsPlot1.Plot.Add.Signal(Generate.RandomSample(50));
+        var left2 = new HorizontalLabelYAxis(Edge.Left) { LabelText = "Secondary Left Axis", LabelFontColor = sig3.Color, };
+        sig3.Axes.YAxis = left2;
+        formsPlot1.Plot.Axes.AddLeftAxis(left2);
+    }
+}
+internal class HorizontalLabelYAxis : YAxisBase
+{
+    public override Edge Edge { get; }
+    public PixelSize AxisLabelSize { get; private set; }
+    public HorizontalLabelYAxis(Edge edge)
+    {
+        if (edge != Edge.Left && edge != Edge.Right) throw new InvalidOperationException();
+        Edge = edge;
+        TickGenerator = new ScottPlot.TickGenerators.NumericAutomatic();
+        LabelAlignment = Alignment.UpperCenter; // 軸に対して上部中央
+        LabelRotation = 0; // 回転なし
+    }
+    public override float Measure(Paint paint)
+    {
+        if (!IsVisible) return 0;
+        if (!Range.HasBeenSet) return SizeWhenNoData;
+        float maxTickLabelWidth = TickGenerator.Ticks.Length > 0
+            ? TickGenerator.Ticks.Select(x => TickLabelStyle.Measure(x.Label, paint).Width).Max() : 0;
+        // 軸ラベルサイズ
+        AxisLabelSize = string.IsNullOrEmpty(LabelStyle.Text) && LabelStyle.Image is null
+            ? PixelSize.Zero : LabelStyle.Measure(LabelText, paint).Size;
+        // 目盛りラベル幅と軸ラベル幅半分の大きい方を採用＋適当にパディング
+        return MathF.Max(maxTickLabelWidth, AxisLabelSize.Width / 2)
+            + PaddingBetweenTickAndAxisLabels.Horizontal
+            + PaddingOutsideAxisLabels.Horizontal;
+    }
+    public override void Render(RenderPack rp, float size, float offset)
+    {
+        if (!IsVisible) return;
+        PixelRect panelRect = GetPanelRect(rp.DataRect, size, offset, rp.Paint);
+        float x = Edge == Edge.Left ? panelRect.Right : panelRect.Left;
+        Pixel labelPoint = new(x, rp.DataRect.Top);
+        //Drawing.DrawDebugRectangle(rp.Canvas, rp.Paint, panelRect, labelPoint, LabelFontColor);
+        // 上にずらす座標計算（内側の軸から順に上に乗っていく仕様）
+        var axes = Edge == Edge.Left
+            ? rp.Plot.Axes.GetAxes(Edge.Left).OfType<HorizontalLabelYAxis>().ToList()
+            : rp.Plot.Axes.GetAxes(Edge.Right).OfType<HorizontalLabelYAxis>().ToList();
+        var offsetY = axes.Take(axes.IndexOf(this) + 1).Sum(x => x.AxisLabelSize.Height);
+        LabelStyle.Render(rp.Canvas, labelPoint.MovedUp(offsetY), rp.Paint);
+        DrawTicks(rp, TickLabelStyle, panelRect, TickGenerator.Ticks, this, MajorTickStyle, MinorTickStyle);
+        DrawFrame(rp, panelRect, Edge, FrameLineStyle);
+    }
+}
+```
+![アプリ画像](https://ddjkaamml8q8x.cloudfront.net/questions/2026-02-01/9734a22c-d69c-442b-8a8c-6b9c2ff96e15.png)