DrawItemEventArgs.Bounds プロパティ

定義

描画されている項目の境界を表す四角形を取得します。Gets the rectangle that represents the bounds of the item that is being drawn.

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

プロパティ値

Rectangle

描画されている項目の境界を表す RectangleThe Rectangle that represents the bounds of the item that is being drawn.

次の例は、オーナー描画の項目を作成する方法を示して ListBox います。The following example demonstrates how to create owner-drawn ListBox items. このコードでは、プロパティを使用して、 DrawMode 描画された項目が固定サイズであることを指定し、イベントを使用して DrawItem 各項目の描画を実行し ListBox ます。The code uses the DrawMode property to specify that the items drawn are fixed sized and the DrawItem event to perform the drawing of each item into the ListBox. このコード例では、 DrawItemEventArgs イベントハンドラーにパラメーターとして渡されたクラスのプロパティとメソッドを使用して、項目を描画します。The example code uses the properties and methods of the DrawItemEventArgs class passed as a parameter to the event handler to draw the items. この例では、 ListBox という名前のコントロールが listBox1 フォームに追加され、この DrawItem コード例で定義されているイベントハンドラーによってイベントが処理されることを前提としています。This example assumes that a ListBox control that is named listBox1 has been added to a form and that the DrawItem event is handled by the event handler defined in the example code. また、この例では、 ListBox "Apple"、"オレンジ"、および "Plum" というテキストをこの順序で使用して、に項目が追加されていることを前提としています。The example also assumes that items have been added to the ListBox with the text of "Apple", "Orange", and "Plum" in that order.

private ListBox ListBox1 = new ListBox();
private void InitializeListBox()
{
    ListBox1.Items.AddRange(new Object[] 
        { "Red Item", "Orange Item", "Purple Item" });
    ListBox1.Location = new System.Drawing.Point(81, 69);
    ListBox1.Size = new System.Drawing.Size(120, 95);
    ListBox1.DrawMode = DrawMode.OwnerDrawFixed;
    ListBox1.DrawItem += new DrawItemEventHandler(ListBox1_DrawItem);
    Controls.Add(ListBox1);
}

private void ListBox1_DrawItem(object sender, 
    System.Windows.Forms.DrawItemEventArgs e)
{
    // Draw the background of the ListBox control for each item.
    e.DrawBackground();
    // Define the default color of the brush as black.
    Brush myBrush = Brushes.Black;

    // Determine the color of the brush to draw each item based 
    // on the index of the item to draw.
    switch (e.Index)
    {
        case 0:
            myBrush = Brushes.Red;
            break;
        case 1:
            myBrush = Brushes.Orange;
            break;
        case 2:
            myBrush = Brushes.Purple;
            break;
    }

    // Draw the current item text based on the current Font 
    // and the custom brush settings.
    e.Graphics.DrawString(ListBox1.Items[e.Index].ToString(), 
        e.Font, myBrush, e.Bounds, StringFormat.GenericDefault);
    // If the ListBox has focus, draw a focus rectangle around the selected item.
    e.DrawFocusRectangle();
}
Private WithEvents ListBox1 As New ListBox()

Private Sub InitializeListBox() 
    ListBox1.Items.AddRange(New Object() _
        {"Red Item", "Orange Item", "Purple Item"})
    ListBox1.Location = New System.Drawing.Point(81, 69)
    ListBox1.Size = New System.Drawing.Size(120, 95)
    ListBox1.DrawMode = DrawMode.OwnerDrawFixed
    Controls.Add(ListBox1)

End Sub

Private Sub ListBox1_DrawItem(ByVal sender As Object, _
 ByVal e As System.Windows.Forms.DrawItemEventArgs) _
 Handles ListBox1.DrawItem

    ' Draw the background of the ListBox control for each item.
    e.DrawBackground()

    ' Define the default color of the brush as black.
    Dim myBrush As Brush = Brushes.Black

    ' Determine the color of the brush to draw each item based on   
    ' the index of the item to draw.
    Select Case e.Index
        Case 0
            myBrush = Brushes.Red
        Case 1
            myBrush = Brushes.Orange
        Case 2
            myBrush = Brushes.Purple
    End Select

    ' Draw the current item text based on the current 
    ' Font and the custom brush settings.
    e.Graphics.DrawString(ListBox1.Items(e.Index).ToString(), _
        e.Font, myBrush, e.Bounds, StringFormat.GenericDefault)

    ' If the ListBox has focus, draw a focus rectangle around  _ 
    ' the selected item.
    e.DrawFocusRectangle()
End Sub

適用対象

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