CheckedListBox：如何提高複選框的大小，改變刻度

Question

的顏色我想重寫如下CheckedListBox的默認外觀：

請注意複選框增加的大小和顏色的刻度線。

Answer 1

爲此，您需要通過繼承CheckedListbox創建自己的自定義控制，並需要重寫OnDrawItem(DrawItemEventArgs e)事件

下面是代碼：

class BigCheckedListBox : CheckedListBox 
{ 
    public BigCheckedListBox() 
    { 
     ForeColor = Color.Turquoise; 
     Font = new Font("Segoe UI", 12f); 
    } 
    protected override void OnDrawItem(DrawItemEventArgs e) 
    { 
     e.DrawBackground(); 

     var b = e.Bounds; 
     var state = GetItemChecked(e.Index) ? CheckBoxState.CheckedNormal : CheckBoxState.UncheckedNormal; 
     Size glyphSize = CheckBoxRenderer.GetGlyphSize(e.Graphics, state); 
     int checkPad = (b.Height - glyphSize.Height)/2; 
     var pt = new Point(b.X + checkPad, b.Y + checkPad); 

     Rectangle rect = new Rectangle(pt, new Size(20, 20)); 
     e.Graphics.DrawRectangle(Pens.Green, rect);//This is for Checkbox rectangle 

     //This is for drawing string text 
     using (SolidBrush brush = new SolidBrush(ForeColor)) 
      e.Graphics.DrawString(this.Items[e.Index].ToString(), Font, brush, pt.X + 27f, pt.Y); 


     if (state == CheckBoxState.CheckedNormal) 
     { 
      using (SolidBrush brush = new SolidBrush(ForeColor)) 
      using (Font wing = new Font("Wingdings", 17f, FontStyle.Bold)) 
       e.Graphics.DrawString("ü", wing, brush, pt.X-4, pt.Y-1); //This is For tick mark 
     } 
    } 
} 

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