TabControl.DrawMode 屬性
定義
重要
部分資訊涉及發行前產品,在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊,不做任何明確或隱含的瑕疵擔保。
取得或設定控制項索引標籤的繪製方式。
public:
property System::Windows::Forms::TabDrawMode DrawMode { System::Windows::Forms::TabDrawMode get(); void set(System::Windows::Forms::TabDrawMode value); };
public System.Windows.Forms.TabDrawMode DrawMode { get; set; }
member this.DrawMode : System.Windows.Forms.TabDrawMode with get, set
Public Property DrawMode As TabDrawMode
屬性值
其中一個 TabDrawMode 值。 預設值為 Normal
。
例外狀況
屬性值不是有效的 TabDrawMode 值。
範例
下列程式碼範例會使用一個 TabControlTabPage 來建立 。 本範例會將 DrawMode 屬性設定為 OwnerDrawFixed
,指定父物件 Form1
繪製索引標籤。 值 OwnerDrawFixed
也可讓您存取 DrawItem 事件,在此範例中,會用來在索引標籤上 tabPage1
繪製 myTabRect
。
搭配此範例使用 System.Drawing 和 System.Windows.Forms 命名空間。
using namespace System::Drawing;
using namespace System::Windows::Forms;
public ref class Form1: public Form
{
private:
TabControl^ tabControl1;
Rectangle myTabRect;
public:
Form1()
{
tabControl1 = gcnew TabControl;
TabPage^ tabPage1 = gcnew TabPage;
// Sets the tabs to be drawn by the parent window Form1.
// OwnerDrawFixed allows access to DrawItem.
tabControl1->DrawMode = TabDrawMode::OwnerDrawFixed;
tabControl1->Controls->Add( tabPage1 );
tabControl1->Location = Point(25,25);
tabControl1->Size = System::Drawing::Size( 250, 250 );
tabPage1->TabIndex = 0;
myTabRect = tabControl1->GetTabRect( 0 );
ClientSize = System::Drawing::Size( 300, 300 );
Controls->Add( tabControl1 );
tabControl1->DrawItem += gcnew DrawItemEventHandler( this, &Form1::OnDrawItem );
}
private:
void OnDrawItem( Object^ /*sender*/, DrawItemEventArgs^ e )
{
Graphics^ g = e->Graphics;
Pen^ p = gcnew Pen( Color::Blue );
g->DrawRectangle( p, myTabRect );
}
};
int main()
{
Application::Run( gcnew Form1 );
}
using System.Drawing;
using System.Windows.Forms;
public class Form1 : Form
{
private TabControl tabControl1;
private Rectangle myTabRect;
public Form1()
{
tabControl1 = new TabControl();
TabPage tabPage1 = new TabPage();
// Sets the tabs to be drawn by the parent window Form1.
// OwnerDrawFixed allows access to DrawItem.
tabControl1.DrawMode = TabDrawMode.OwnerDrawFixed;
tabControl1.Controls.Add(tabPage1);
tabControl1.Location = new Point(25, 25);
tabControl1.Size = new Size(250, 250);
tabPage1.TabIndex = 0;
myTabRect = tabControl1.GetTabRect(0);
ClientSize = new Size(300, 300);
Controls.Add(tabControl1);
tabControl1.DrawItem += new DrawItemEventHandler(OnDrawItem);
}
private void OnDrawItem(object sender, DrawItemEventArgs e)
{
Graphics g = e.Graphics;
Pen p = new Pen(Color.Blue);
g.DrawRectangle(p, myTabRect);
}
static void Main()
{
Application.Run(new Form1());
}
}
Imports System.Drawing
Imports System.Windows.Forms
Public Class Form1
Inherits Form
Private tabControl1 As TabControl
Private myTabRect As Rectangle
Public Sub New()
tabControl1 = New TabControl()
Dim tabPage1 As New TabPage()
' Sets the tabs to be drawn by the parent window Form1.
' OwnerDrawFixed allows access to DrawItem.
tabControl1.DrawMode = TabDrawMode.OwnerDrawFixed
tabControl1.Controls.Add(tabPage1)
tabControl1.Location = New Point(25, 25)
tabControl1.Size = New Size(250, 250)
tabPage1.TabIndex = 0
myTabRect = tabControl1.GetTabRect(0)
ClientSize = New Size(300, 300)
Controls.Add(tabControl1)
AddHandler tabControl1.DrawItem, AddressOf OnDrawItem
End Sub
Private Sub OnDrawItem(ByVal sender As Object, ByVal e As DrawItemEventArgs)
Dim g As Graphics = e.Graphics
Dim p As New Pen(Color.Blue)
g.DrawRectangle(p, myTabRect)
End Sub
Shared Sub Main()
Application.Run(New Form1())
End Sub
End Class
備註
當您將 DrawMode 屬性設定為 OwnerDrawFixed 時, TabControl 每當需要繪製其中一個索引標籤時,就會引發 DrawItem 事件。 若要自訂索引標籤的外觀,請在 事件的處理常式 DrawItem 中提供您自己的繪製程式碼。
TabControl不支援具有擁有者繪圖的可變索引標籤大小。
適用於
另請參閱
意見反應
https://aka.ms/ContentUserFeedback。
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