ToolStripItem.Owner Properti

Definisi

Ruang nama:

System.Windows.Forms

Rakitan:

System.Windows.Forms.dll

Mendapatkan atau menyetel pemilik item ini.

public:
 property System::Windows::Forms::ToolStrip ^ Owner { System::Windows::Forms::ToolStrip ^ get(); void set(System::Windows::Forms::ToolStrip ^ value); };

[System.ComponentModel.Browsable(false)]
public System.Windows.Forms.ToolStrip? Owner { get; set; }

[<System.ComponentModel.Browsable(false)>]
member this.Owner : System.Windows.Forms.ToolStrip with get, set

Public Property Owner As ToolStrip

Nilai Properti

ToolStrip

ToolStrip yang memiliki atau adalah untuk memiliki ToolStripItem.

Atribut

BrowsableAttribute

Contoh

Contoh kode berikut menunjukkan cara menggunakan properti untuk penyajian Owner kustom. Contoh kode ini adalah bagian dari contoh yang lebih besar yang disediakan untuk ToolStripItem kelas .

// This method defines the painting behavior of the control.
// It performs the following operations:
//
// Computes the layout of the item's image and text.
// Draws the item's background image.
// Draws the item's image.
// Draws the item's text.
//
// Drawing operations are implemented in the 
// RolloverItemRenderer class.
protected override void OnPaint(PaintEventArgs e)
{
    base.OnPaint(e);

    if (this.Owner != null)
    {
        // Find the dimensions of the image and the text 
        // areas of the item. 
        this.ComputeImageAndTextLayout();

        // Draw the background. This includes drawing a highlighted 
        // border when the mouse is in the client area.
        ToolStripItemRenderEventArgs ea = new ToolStripItemRenderEventArgs(
             e.Graphics,
             this);
        this.Owner.Renderer.DrawItemBackground(ea);

        // Draw the item's image. 
        ToolStripItemImageRenderEventArgs irea =
            new ToolStripItemImageRenderEventArgs(
            e.Graphics,
            this,
            imageRect );
        this.Owner.Renderer.DrawItemImage(irea);

        // If the item is on a drop-down, give its
        // text a different highlighted color.
        Color highlightColor = 
            this.IsOnDropDown ?
            Color.Salmon : SystemColors.ControlLightLight;

        // Draw the text, and highlight it if the 
        // the rollover state is true.
        ToolStripItemTextRenderEventArgs rea =
            new ToolStripItemTextRenderEventArgs(
            e.Graphics,
            this,
            base.Text,
            textRect,
            this.rolloverValue ? highlightColor : base.ForeColor,
            base.Font,
            base.TextAlign);
        this.Owner.Renderer.DrawItemText(rea);
    }
}

' This method defines the painting behavior of the control.
' It performs the following operations:
'
' Computes the layout of the item's image and text.
' Draws the item's background image.
' Draws the item's image.
' Draws the item's text.
'
' Drawing operations are implemented in the 
' RolloverItemRenderer class.
Protected Overrides Sub OnPaint(e As PaintEventArgs)
   MyBase.OnPaint(e)
   
   If (Me.Owner IsNot Nothing) Then
      ' Find the dimensions of the image and the text 
      ' areas of the item. 
      Me.ComputeImageAndTextLayout()
      
      ' Draw the background. This includes drawing a highlighted 
      ' border when the mouse is in the client area.
      Dim ea As New ToolStripItemRenderEventArgs(e.Graphics, Me)
      Me.Owner.Renderer.DrawItemBackground(ea)
      
      ' Draw the item's image. 
      Dim irea As New ToolStripItemImageRenderEventArgs(e.Graphics, Me, imageRect)
      Me.Owner.Renderer.DrawItemImage(irea)
      
      ' If the item is on a drop-down, give its
      ' text a different highlighted color.
         Dim highlightColor As Color = CType(IIf(Me.IsOnDropDown, Color.Salmon, SystemColors.ControlLightLight), Color)
      
      ' Draw the text, and highlight it if the 
      ' the rollover state is true.
         Dim rea As New ToolStripItemTextRenderEventArgs( _
            e.Graphics, _
            Me, _
            MyBase.Text, _
            textRect, _
            CType(IIf(Me.rolloverValue, highlightColor, MyBase.ForeColor), Color), _
            MyBase.Font, _
            MyBase.TextAlign)
      Me.Owner.Renderer.DrawItemText(rea)
   End If
 End Sub

Keterangan

Owner ToolStrip mengembalikan koleksi Item yang berisi yang saat ini ToolStripItem. Ini adalah cara terbaik untuk mereferensikan ImageList atau properti lain di tingkat ToolStrip atas tanpa menulis kode khusus untuk menangani luapan.

Owner tetap sama bahkan jika item jatuh ke ToolStripOverflowdalam . Owner bisa null untuk elemen tertentu yang ada dalam DisplayedItems koleksi tetapi tidak dalam Items koleksi.