ToolStripItem.Placement プロパティ

public:
 property System::Windows::Forms::ToolStripItemPlacement Placement { System::Windows::Forms::ToolStripItemPlacement get(); };

[System.ComponentModel.Browsable(false)]
public System.Windows.Forms.ToolStripItemPlacement Placement { get; }

[<System.ComponentModel.Browsable(false)>]
member this.Placement : System.Windows.Forms.ToolStripItemPlacement

Public ReadOnly Property Placement As ToolStripItemPlacement

プロパティ値

ToolStripItemPlacement 値のいずれか 1 つ。

属性

BrowsableAttribute

例

次のコード例では、 プロパティを使用してカスタム レンダリングを Placement 行う方法を示します。 このコード例は、ToolStripItem クラスのために提供されている大規模な例の一部です。

// This method defines the behavior for rendering the
// background of a ToolStripItem. If the item is a
// RolloverItem, it paints the item's BackgroundImage 
// centered in the client area. If the mouse is in the 
// item's client area, a border is drawn around it.
// If the item is on a drop-down or if it is on the
// overflow, a gradient is painted in the background.
protected override void OnRenderItemBackground(
    ToolStripItemRenderEventArgs e)
{
    base.OnRenderItemBackground(e);

    RolloverItem item = e.Item as RolloverItem;

    // If the ToolSTripItem is of type RolloverItem, 
    // perform custom rendering for the background.
    if (item != null)
    {
        if (item.Placement == ToolStripItemPlacement.Overflow ||
            item.IsOnDropDown)
        {
            using (LinearGradientBrush b = new LinearGradientBrush(
                item.ContentRectangle,
                Color.Salmon,
                Color.DarkRed,
                0f,
                false))
            {
                e.Graphics.FillRectangle(b, item.ContentRectangle);
            }
        }

        // The RolloverItem control only supports 
        // the ImageLayout.Center setting for the
        // BackgroundImage property.
        if (item.BackgroundImageLayout == ImageLayout.Center)
        {
            // Get references to the item's ContentRectangle
            // and BackgroundImage, for convenience.
            Rectangle cr = item.ContentRectangle;
            Image bgi = item.BackgroundImage;

            // Compute the center of the item's ContentRectangle.
            int centerX = (cr.Width - bgi.Width) / 2;
            int centerY = (cr.Height - bgi.Height) / 2;

            // If the item is selected, draw the background
            // image as usual. Otherwise, draw it as disabled.
            if (item.Selected)
            {
                e.Graphics.DrawImage(bgi, centerX, centerY);
            }
            else
            {
                ControlPaint.DrawImageDisabled(
                        e.Graphics,
                        bgi,
                        centerX,
                        centerY,
                        item.BackColor);
            }
        }

        // If the item is in the rollover state, 
        // draw a border around it.
        if (item.Rollover)
        {
            ControlPaint.DrawFocusRectangle(
                e.Graphics,
                item.ContentRectangle);
        }
    }
}

' This method defines the behavior for rendering the
' background of a ToolStripItem. If the item is a
' RolloverItem, it paints the item's BackgroundImage 
' centered in the client area. If the mouse is in the 
' item's client area, a border is drawn around it.
' If the item is on a drop-down or if it is on the
' overflow, a gradient is painted in the background.
Protected Overrides Sub OnRenderItemBackground(ByVal e As ToolStripItemRenderEventArgs)
    MyBase.OnRenderItemBackground(e)

    Dim item As RolloverItem = CType(e.Item, RolloverItem)

    ' If the ToolSTripItem is of type RolloverItem, 
    ' perform custom rendering for the background.
    If (item IsNot Nothing) Then
        If item.Placement = ToolStripItemPlacement.Overflow OrElse item.IsOnDropDown Then
            Dim b As New LinearGradientBrush(item.ContentRectangle, Color.Salmon, Color.DarkRed, 0.0F, False)
            Try
                e.Graphics.FillRectangle(b, item.ContentRectangle)
            Finally
                b.Dispose()
            End Try
        End If

        ' The RolloverItem control only supports 
        ' the ImageLayout.Center setting for the
        ' BackgroundImage property.
        If item.BackgroundImageLayout = ImageLayout.Center Then
            ' Get references to the item's ContentRectangle
            ' and BackgroundImage, for convenience.
            Dim cr As Rectangle = item.ContentRectangle
            Dim bgi As Image = item.BackgroundImage

            ' Compute the center of the item's ContentRectangle.
            Dim centerX As Integer = CInt((cr.Width - bgi.Width) / 2)
            Dim centerY As Integer = CInt((cr.Height - bgi.Height) / 2)

            ' If the item is selected, draw the background
            ' image as usual. Otherwise, draw it as disabled.
            If item.Selected Then
                e.Graphics.DrawImage(bgi, centerX, centerY)
            Else
                ControlPaint.DrawImageDisabled(e.Graphics, bgi, centerX, centerY, item.BackColor)
            End If
        End If

        ' If the item is in the rollover state, 
        ' draw a border around it.
        If item.Rollover Then
            ControlPaint.DrawFocusRectangle(e.Graphics, item.ContentRectangle)
        End If
    End If
End Sub

注釈

イベント内の Placement プロパティをLayoutCompleted調べて、アイテムが メイン ToolStrip、 オーバーフロー ToolStrip、 または現在表示されていないかどうかを確認します。 項目が表示されない理由として一般的なのは、項目がメインの ToolStrip に収まらず、その Overflow プロパティが Never に設定されていた場合です。

適用対象