DrawToolTipEventArgs.Bounds 屬性

定義

命名空間:

System.Windows.Forms

組件:

System.Windows.Forms.dll

來源:

DrawToolTipEventArgs.cs

取得所要繪製 ToolTip 的大小和位置。

public:
 property System::Drawing::Rectangle Bounds { System::Drawing::Rectangle get(); };

public System.Drawing.Rectangle Bounds { get; }

member this.Bounds : System.Drawing.Rectangle

Public ReadOnly Property Bounds As Rectangle

屬性值

Rectangle

Rectangle，表示所要繪製 ToolTip 的界限。

範例

下列程式碼範例示範如何自訂繪製 ToolTip 。 此範例會建立 ，並將它與位於 上的 Form 三 Button 個 ToolTip 控制項產生關聯。 此範例會將 OwnerDraw 屬性設定為 true，並處理 Draw 事件。 在事件處理常式中 Draw ， ToolTip 會根據 屬性所 DrawToolTipEventArgs.AssociatedControl 指示顯示的按鈕 ToolTip ，以不同的方式繪製 。

下列程式碼摘錄示範如何使用 DrawBorder 方法和 Bounds 、 ToolTipText 和 Graphics 屬性。 DrawToolTipEventArgs如需完整的程式碼範例，請參閱類別概觀。

// Draw a custom background and text if the ToolTip is for button2.
else

// Draw a custom background and text if the ToolTip is for button2.
if ( e->AssociatedControl == button2 )
{
   // Draw the custom background.
   e->Graphics->FillRectangle( SystemBrushes::ActiveCaption, e->Bounds );
   
   // Draw the standard border.
   e->DrawBorder();
   
   // Draw the custom text.
   // The using block will dispose the StringFormat automatically.
   StringFormat^ sf = gcnew StringFormat;
   try
   {
      sf->Alignment = StringAlignment::Center;
      sf->LineAlignment = StringAlignment::Center;
      sf->HotkeyPrefix = System::Drawing::Text::HotkeyPrefix::None;
      sf->FormatFlags = StringFormatFlags::NoWrap;
      System::Drawing::Font^ f = gcnew System::Drawing::Font( "Tahoma",9 );
      try
      {
         e->Graphics->DrawString( e->ToolTipText, f, SystemBrushes::ActiveCaptionText, e->Bounds, sf );
      }
      finally
      {
         if ( f )
            delete safe_cast<IDisposable^>(f);
      }

   }
   finally
   {
      if ( sf )
         delete safe_cast<IDisposable^>(sf);
   }
}

// Draw a custom background and text if the ToolTip is for button2.
else if (e.AssociatedControl == button2)
{
    // Draw the custom background.
    e.Graphics.FillRectangle(SystemBrushes.ActiveCaption, e.Bounds);

    // Draw the standard border.
    e.DrawBorder();

    // Draw the custom text.
    // The using block will dispose the StringFormat automatically.
    using (StringFormat sf = new StringFormat())
    {
        sf.Alignment = StringAlignment.Center;
        sf.LineAlignment = StringAlignment.Center;
        sf.HotkeyPrefix = System.Drawing.Text.HotkeyPrefix.None;
        sf.FormatFlags = StringFormatFlags.NoWrap;
        using (Font f = new Font("Tahoma", 9))
        {
            e.Graphics.DrawString(e.ToolTipText, f, 
                SystemBrushes.ActiveCaptionText, e.Bounds, sf);
        }
    }
}

ElseIf (e.AssociatedControl Is button2) Then
    ' Draw a custom background and text if the ToolTip is for button2.

    ' Draw the custom background.
    e.Graphics.FillRectangle(SystemBrushes.ActiveCaption, e.Bounds)

    ' Draw the standard border.
    e.DrawBorder()

    ' Draw the custom text.
    Dim sf As StringFormat = New StringFormat
    Try
        sf.Alignment = StringAlignment.Center
        sf.LineAlignment = StringAlignment.Center
        sf.HotkeyPrefix = System.Drawing.Text.HotkeyPrefix.None
        sf.FormatFlags = StringFormatFlags.NoWrap

        Dim f As Font = New Font("Tahoma", 9)
        Try
            e.Graphics.DrawString(e.ToolTipText, f, _
                SystemBrushes.ActiveCaptionText, _
                RectangleF.op_Implicit(e.Bounds), sf)
        Finally
            f.Dispose()
        End Try
    Finally
        sf.Dispose()
    End Try

備註

根據預設，界限是由作業系統根據系統設定和文字來 ToolTip 設定。 您可以藉由處理 PopupPopup 類別的事件 ToolTip ，在顯示之前增加 的界限 ToolTip 。