优化坐标绘制，支持大数据

Demo/Demo.cs

@@ -0,0 +1,52 @@
+using UnityEngine;
+using UnityEngine.UI;
+using xcharts;
+
+public class Demo : MonoBehaviour
+{
+    public Theme theme = Theme.Dark;
+
+    private BaseChart chart;
+    private float time;
+    private int count;
+    private Theme checkTheme = Theme.Dark;
+
+    void Awake()
+    {
+        var xchart = transform.Find("xchart");
+        GridLayoutGroup grid = xchart.GetComponent<GridLayoutGroup>();
+        RectTransform rect = transform.GetComponent<RectTransform>();
+        var wid = rect.sizeDelta.x;
+        int childNum = xchart.childCount;
+        float hig = grid.padding.top + childNum * (grid.cellSize.y + grid.spacing.y);
+        rect.sizeDelta = new Vector2(wid, hig);
+        xchart.GetComponent<RectTransform>().sizeDelta = new Vector2(wid, hig);
+
+        chart = xchart.gameObject.GetComponentInChildren<BaseChart>();
+    }
+
+    void Update()
+    {
+        time += Time.deltaTime;
+        if (time >= 1)
+        {
+            time = 0;
+            count++;
+            chart.UpdateData(0, Random.RandomRange(60, 150));
+        }
+        if (checkTheme != theme)
+        {
+            checkTheme = theme;
+            UpdateTheme(theme);
+        }
+    }
+
+    void UpdateTheme(Theme theme)
+    {
+        var charts = transform.Find("xchart").GetComponentsInChildren<BaseChart>();
+        foreach (var chart in charts)
+        {
+            chart.UpdateTheme(theme);
+        }
+    }
+}