* UITabControl：增加MainPage属性，显示关闭按钮时，此页面无按钮且不可关闭

SunnyUI.Demo/Controls/FButton.resx

@@ -120,6 +120,9 @@
   <metadata name="uiToolTip1.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
     <value>17, 17</value>
   </metadata>
+  <metadata name="uiToolTip1.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
+    <value>17, 17</value>
+  </metadata>
   <metadata name="$this.TrayHeight" type="System.Int32, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
     <value>52</value>
   </metadata>

SunnyUI.Demo/Controls/FTabControl.Designer.cs

@@ -72,6 +72,7 @@
             this.uiTabControl1.Font = new System.Drawing.Font("微软雅黑", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
             this.uiTabControl1.ItemSize = new System.Drawing.Size(150, 40);
             this.uiTabControl1.Location = new System.Drawing.Point(30, 52);
+            this.uiTabControl1.MainPage = "tabPage1";
             this.uiTabControl1.MenuStyle = Sunny.UI.UIMenuStyle.Custom;
             this.uiTabControl1.Name = "uiTabControl1";
             this.uiTabControl1.SelectedIndex = 0;

SunnyUI/Charts/UILineChart.cs

@@ -33,7 +33,7 @@ namespace Sunny.UI
     [ToolboxItem(true)]
     public class UILineChart : UIChart
     {
-        private bool NeedDraw;
+        protected bool NeedDraw;
 
         protected override void OnSizeChanged(EventArgs e)
         {
@@ -72,7 +72,7 @@ namespace Sunny.UI
         private double[] YLabels;
         private double[] XLabels;
 
-        private void CalcAxises()
+        protected void CalcAxises()
         {
             if (Option.XAxisType == UIAxisType.DateTime)
                 XScale = new UIDateScale();
@@ -257,7 +257,7 @@ namespace Sunny.UI
             }
         }
 
-        private void DrawSeries(Graphics g, Color color, UILineSeries series)
+        protected virtual void DrawSeries(Graphics g, Color color, UILineSeries series)
         {
             if (series.Points.Count == 0)
             {

SunnyUI/Controls/UITabControl.cs

@@ -59,6 +59,20 @@ namespace Sunny.UI
             timer.Dispose();
         }
 
+        private string mainPage = "";
+
+        [DefaultValue(true)]
+        [Description("主页名称，此页面不显示关闭按钮"), Category("SunnyUI")]
+        public string MainPage
+        {
+            get => mainPage;
+            set
+            {
+                mainPage = value;
+                Invalidate();
+            }
+        }
+
         private void Timer_Tick(object sender, EventArgs e)
         {
             timer.Stop();
@@ -432,7 +446,9 @@ namespace Sunny.UI
                 g.DrawString(TabPages[index].Text, Font, index == SelectedIndex ? tabSelectedForeColor : TabUnSelectedForeColor, textLeft, TabRect.Top + 2 + (TabRect.Height - sf.Height - 4) / 2.0f);
 
                 var menuItem = Helper[index];
-                bool showButton = menuItem == null || !menuItem.AlwaysOpen;
+                bool show1 = TabPages[index].Text != MainPage;
+                bool show2 = menuItem == null || !menuItem.AlwaysOpen;
+                bool showButton = show1 && show2;
 
                 if (showButton)
                 {
@@ -484,7 +500,9 @@ namespace Sunny.UI
             }
 
             var menuItem = Helper[removeIndex];
-            bool showButton = menuItem == null || !menuItem.AlwaysOpen;
+            bool show1 = TabPages[removeIndex].Text != MainPage;
+            bool show2 = menuItem == null || !menuItem.AlwaysOpen;
+            bool showButton = show1 && show2;
             if (showButton)
             {
                 if (ShowCloseButton)

SunnyUI/Controls/UITreeView.cs

@@ -685,7 +685,7 @@ namespace Sunny.UI
 
                     if (haveImage)
                     {
-                        if (TreeNodeSelected(e) && e.Node.SelectedImageIndex >= 0 &&
+                        if (e.Node == SelectedNode && e.Node.SelectedImageIndex >= 0 &&
                             e.Node.SelectedImageIndex < ImageList.Images.Count)
                             e.Graphics.DrawImage(ImageList.Images[e.Node.SelectedImageIndex], imageLeft,
                                 e.Bounds.Y + (e.Bounds.Height - ImageList.ImageSize.Height) / 2);