From cc737578baa0dadef5c2b82b6ada66c117ba3d6b Mon Sep 17 00:00:00 2001
From: walker <shengxuqiang@joylink.club>
Date: Fri, 1 Sep 2023 17:12:26 +0800
Subject: [PATCH] =?UTF-8?q?=E5=86=8D=E8=B0=83=E6=95=B4=E5=AF=B9=E6=AF=94?=
 =?UTF-8?q?=E8=89=B2=E7=AE=97=E6=B3=95?=
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---
 src/jlgraphic/plugins/CommonMousePlugin.ts | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/src/jlgraphic/plugins/CommonMousePlugin.ts b/src/jlgraphic/plugins/CommonMousePlugin.ts
index 8ca6ce7..76993ff 100644
--- a/src/jlgraphic/plugins/CommonMousePlugin.ts
+++ b/src/jlgraphic/plugins/CommonMousePlugin.ts
@@ -101,13 +101,26 @@ export class CommonMouseTool extends AppInteractionPlugin {
     return new CommonMouseTool(app);
   }
 
+  /**
+   * 计算对比色
+   * @param rgb
+   * @returns
+   */
+  private calContrastColor(rgb: number): number {
+    if (rgb > 0.45 && rgb < 0.55) {
+      return 0;
+    } else {
+      return 1 - rgb;
+    }
+  }
+
   private updateBoxLineColor(cp: ICanvasProperties) {
     // 根据画布背景调整线色
     const color = new Color(cp.backgroundColor);
     // 对比色
-    const r = 1 - color.red;
-    const g = 1 - color.green;
-    const b = 1 - color.blue;
+    const r = this.calContrastColor(color.red);
+    const g = this.calContrastColor(color.green);
+    const b = this.calContrastColor(color.blue);
     this._boxLineColor.setValue([r, g, b]);
   }