DrawItemState 列挙体とは？ わかりやすく解説

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DrawItemState 列挙体

描画中の項目の状態を指定します。

この列挙体には、メンバ値のビットごとの組み合わせを可能にする FlagsAttribute 属性が含まれています。

名前空間: System.Windows.Forms
アセンブリ: System.Windows.Forms (system.windows.forms.dll 内)
構文構文

Visual Basic (宣言)
<FlagsAttribute> _
Public Enumeration DrawItemState
Visual Basic (使用法)
Dim instance As DrawItemState
C#
[FlagsAttribute] 
public enum DrawItemState
C++
[FlagsAttribute] 
public enum class DrawItemState
J#
/** @attribute FlagsAttribute() */ 
public enum DrawItemState
JScript
FlagsAttribute 
public enum DrawItemState
メンバメンバ
 メンバ名説明
Checked項目がチェックされています。この値を使用するのは、メニュー コントロールだけです。 
ComboBoxEdit項目は、ComboBox の編集部分です。 
Default項目は、既定の状態で表示されます。 
Disabled項目は使用できません。 
Focus項目にフォーカスがあります。 
Grayed項目が淡色表示になっています。この値を使用するのは、メニュー コントロールだけです。 
HotLight項目はホット トラッキング中です。つまり、項目の上にマウス ポインタが配置されると、強調表示されます。 
Inactive項目はアクティブではありません。 
NoAccelerator項目がキーボード アクセラレータなしで表示されます。 
NoFocusRect項目は、フォーカスがあることを示すビジュアル キューなしで表示されます。 
None現在、項目には状態がありません。 
Selected項目が選択されています。 
解説解説

この列挙体は、DrawItemEventArgs.State などのメンバで使用されます。

使用例使用例
Visual Basic
Public Class Form1
   Inherits System.Windows.Forms.Form
   Private WithEvents listBox1 As
 System.Windows.Forms.ListBox
   Private components As System.ComponentModel.Container
 = Nothing

   Private FontSize As Single
 = 12.0F

   '
   '  This sample displays a ListBox that contains a list of all the
 fonts
   '  installed on the system and draws each item in its respective
 font.
   '
   Public Sub New()
      InitializeComponent()

      ' Populate control with the fonts installed on the system.
      Dim families As FontFamily() = FontFamily.Families

      Dim family As FontFamily
      For Each family In
 families
         Dim style As FontStyle = FontStyle.Regular

         ' Monotype Corsiva is only available in italic
         If family.Name = "Monotype Corsiva"
 Then
            style = style Or FontStyle.Italic
         End If

         listBox1.Items.Add(New ListBoxFontItem(New
 Font(family.Name, FontSize, style, GraphicsUnit.Point)))
      Next family
   End Sub


   Protected Overloads Overrides
 Sub Dispose(ByVal disposing As
 Boolean)
      If disposing Then
         If Not (components Is
 Nothing) Then
            components.Dispose()
         End If

         If Not (foreColorBrush Is
 Nothing) Then
            foreColorBrush.Dispose()
         End If
      End If

      MyBase.Dispose(disposing)
   End Sub

   Private Sub InitializeComponent()
      Me.listBox1 = New System.Windows.Forms.ListBox()
      Me.SuspendLayout()
      ' 
      ' listBox1
      ' 
      Me.listBox1.DrawMode = System.Windows.Forms.DrawMode.OwnerDrawVariable
      Me.listBox1.Location = New System.Drawing.Point(16,
 48)
      Me.listBox1.Name = "listBox1"
      Me.listBox1.SelectionMode = System.Windows.Forms.SelectionMode.MultiExtended
      Me.listBox1.Size = New System.Drawing.Size(256,
 134)
      Me.listBox1.TabIndex = 0
      ' 
      ' Form1
      ' 
      Me.ClientSize = New System.Drawing.Size(292,
 273)
      Me.Controls.AddRange(New System.Windows.Forms.Control()
 {Me.listBox1})
      Me.Name = "Form1"
      Me.Text = "Form1"
      Me.ResumeLayout(False)
   End Sub

   <STAThread()> Shared Sub Main()
      Application.Run(New Form1())
   End Sub

   Private Sub listBox1_MeasureItem(ByVal
 sender As Object, ByVal
 e As System.Windows.Forms.MeasureItemEventArgs) Handles listBox1.MeasureItem
      Dim font As Font = CType(listBox1.Items(e.Index),
 ListBoxFontItem).Font
      Dim stringSize As SizeF = e.Graphics.MeasureString(font.Name,
 font)

      ' Set the height and width of the item
      e.ItemHeight = CInt(stringSize.Height)
      e.ItemWidth = CInt(stringSize.Width)
   End Sub

   ' For efficiency, cache the brush used for drawing.
   Private foreColorBrush As SolidBrush

   Private Sub listBox1_DrawItem(ByVal
 sender As Object, ByVal
 e As System.Windows.Forms.DrawItemEventArgs) Handles listBox1.DrawItem
      Dim brush As Brush

      ' Create the brush using the ForeColor specified by the DrawItemEventArgs
      If foreColorBrush Is Nothing
 Then
         foreColorBrush = New SolidBrush(e.ForeColor)
      Else
         If Not foreColorBrush.Color.Equals(e.ForeColor)
 Then
            ' The control's ForeColor has changed, so dispose of the
 cached brush and
            ' create a new one.
            foreColorBrush.Dispose()
            foreColorBrush = New SolidBrush(e.ForeColor)
         End If
      End If

      ' Select the appropriate brush depending on if the item is selected.
      ' Since State can be a combinateion (bit-flag) of enum values,
 you can't use
      ' "==" to compare them.
      If (e.State And DrawItemState.Selected)
 = DrawItemState.Selected Then
         brush = SystemBrushes.HighlightText
      Else
         brush = foreColorBrush
      End If

      ' Perform the painting.
      Dim font As Font = CType(listBox1.Items(e.Index),
 ListBoxFontItem).Font
      e.DrawBackground()
      e.Graphics.DrawString(font.Name, font, brush, e.Bounds.X, e.Bounds.Y)
      e.DrawFocusRectangle()
   End Sub

   '
   '  A wrapper class for use with storing Fonts in a ListBox.  Since
 ListBox uses the
   '  ToString() of its items for the text it displays, this class is
 needed to return
   '  the name of the font, rather than its ToString() value.
   '
   Public Class ListBoxFontItem
      Public Font As Font

      Public Sub New(ByVal
 f As Font)
         Font = f
      End Sub

      Public Overrides Function
 ToString() As String
         Return Font.Name
      End Function
   End Class
End Class
C#
public class Form1 : System.Windows.Forms.Form
{
   private System.Windows.Forms.ListBox listBox1;
   private System.ComponentModel.Container components = null;


   protected override void Dispose(bool
 disposing)
   {
      if( disposing )
      {
         if ( components != null ) 
            components.Dispose();

         if ( foreColorBrush != null )
            foreColorBrush.Dispose();
      }
      base.Dispose(disposing);
   }

     #region Windows Form Designer generated code
   /// <summary>
   /// Required method for Designer support - do not modify
   /// the contents of this method with the code editor.
   /// </summary>
   private void InitializeComponent()
   {
      this.listBox1 = new System.Windows.Forms.ListBox();
      this.SuspendLayout();
      // 
      // listBox1
      // 
      this.listBox1.DrawMode = System.Windows.Forms.DrawMode.OwnerDrawVariable;
      this.listBox1.Location = new System.Drawing.Point(16,
 48);
      this.listBox1.Name = "listBox1";
      this.listBox1.SelectionMode = System.Windows.Forms.SelectionMode.MultiExtended;
      this.listBox1.Size = new System.Drawing.Size(256,
 134);
      this.listBox1.TabIndex = 0;
      this.listBox1.MeasureItem += new System.Windows.Forms.MeasureItemEventHandler(this.listBox1_MeasureItem);
      this.listBox1.DrawItem += new System.Windows.Forms.DrawItemEventHandler(this.listBox1_DrawItem);
      // 
      // Form1
      // 
      this.ClientSize = new System.Drawing.Size(292,
 273);
      this.Controls.AddRange(new System.Windows.Forms.Control[]
 {
                                                                   this.listBox1});
      this.Name = "Form1";
      this.Text = "Form1";
      this.ResumeLayout(false);

   }
     #endregion

   [STAThread]
   static void Main() 
   {
      Application.Run(new Form1());
   }

   private void listBox1_MeasureItem(object
 sender, System.Windows.Forms.MeasureItemEventArgs e)
   {
      Font font = ((ListBoxFontItem)listBox1.Items[e.Index]).Font;
      SizeF stringSize = e.Graphics.MeasureString(font.Name, font);

      // Set the height and width of the item
      e.ItemHeight = (int)stringSize.Height;
      e.ItemWidth = (int)stringSize.Width;
   }

   // For efficiency, cache the brush to use for drawing.
   private SolidBrush foreColorBrush;

   private void listBox1_DrawItem(object sender,
 System.Windows.Forms.DrawItemEventArgs e)
   {
      Brush brush;

      // Create the brush using the ForeColor specified by the DrawItemEventArgs
      if ( foreColorBrush == null )
         foreColorBrush = new SolidBrush(e.ForeColor);
      else if ( foreColorBrush.Color != e.ForeColor
 )
      {
         // The control's ForeColor has changed, so dispose of the cached
 brush and
         // create a new one.
         foreColorBrush.Dispose();
         foreColorBrush = new SolidBrush(e.ForeColor);
      }

      // Select the appropriate brush depending on if the item is selected.
      // Since State can be a combinateion (bit-flag) of enum values,
 you can't use
      // "==" to compare them.
      if ( (e.State & DrawItemState.Selected) == DrawItemState.Selected
 )
         brush = SystemBrushes.HighlightText;
      else
         brush = foreColorBrush;

      // Perform the painting.
      Font font = ((ListBoxFontItem)listBox1.Items[e.Index]).Font;
      e.DrawBackground();
      e.Graphics.DrawString(font.Name, font, brush, e.Bounds);
      e.DrawFocusRectangle();
   }

   /// <summary>
   ///  A wrapper class for use with storing Fonts in a ListBox.  Since
 ListBox uses the
   ///  ToString() of its items for the text it displays, this class
 is needed to return
   ///  the name of the font, rather than its ToString() value.
   /// </summary>
   public class ListBoxFontItem 
   {
      public Font Font;

      public ListBoxFontItem(Font f) 
      {
         Font = f;
      }

      public override string ToString() 
      {
         return Font.Name;
      }
   }
}
C++
public ref class Form1: public
 System::Windows::Forms::Form
{
private:
   System::Windows::Forms::ListBox^ listBox1;
   System::ComponentModel::Container^ components;

public:
   ~Form1()
   {
      if ( components != nullptr )
      {
         delete components;
      }
   }

private:

   /// <summary>
   /// Required method for Designer support - do not modify
   /// the contents of this method with the code editor.
   /// </summary>
   void InitializeComponent()
   {
      this->listBox1 = gcnew System::Windows::Forms::ListBox;
      this->SuspendLayout();

      // 
      // listBox1
      // 
      this->listBox1->DrawMode = System::Windows::Forms::DrawMode::OwnerDrawVariable;
      this->listBox1->Location = System::Drawing::Point(
 16, 48 );
      this->listBox1->Name = "listBox1";
      this->listBox1->SelectionMode = System::Windows::Forms::SelectionMode::MultiExtended;
      this->listBox1->Size = System::Drawing::Size( 256,
 134 );
      this->listBox1->TabIndex = 0;
      this->listBox1->MeasureItem += gcnew System::Windows::Forms::MeasureItemEventHandler(
 this, &Form1::listBox1_MeasureItem );
      this->listBox1->DrawItem += gcnew System::Windows::Forms::DrawItemEventHandler(
 this, &Form1::listBox1_DrawItem );

      // 
      // Form1
      // 
      this->ClientSize = System::Drawing::Size( 292, 273 );
      array<System::Windows::Forms::Control^>^temp0 = {this->listBox1};
      this->Controls->AddRange( temp0 );
      this->Name = "Form1";
      this->Text = "Form1";
      this->ResumeLayout( false );
   }

   void listBox1_MeasureItem( Object^ /*sender*/, MeasureItemEventArgs^
 e )
   {
      System::Drawing::Font^ font = (dynamic_cast<ListBoxFontItem^>(listBox1->Items[
 e->Index ]))->Font;
      SizeF stringSize = e->Graphics->MeasureString( font->Name, font );
      
      // Set the height and width of the item
      e->ItemHeight = (int)stringSize.Height;
      e->ItemWidth = (int)stringSize.Width;
   }

   // For efficiency, cache the brush to use for drawing.
   SolidBrush^ foreColorBrush;
   void listBox1_DrawItem( Object^ /*sender*/, DrawItemEventArgs^
 e )
   {
      Brush^ brush;

      // Create the brush using the ForeColor specified by the DrawItemEventArgs
      if ( foreColorBrush == nullptr )
            foreColorBrush = gcnew SolidBrush( e->ForeColor );
      else
      if ( foreColorBrush->Color != e->ForeColor )
      {
         // The control's ForeColor has changed, so dispose of the cached
 brush and
         // create a new one.
         delete foreColorBrush;
         foreColorBrush = gcnew SolidBrush( e->ForeColor );
      }

      // Select the appropriate brush depending on if the item is selected.
      // Since State can be a combinateion (bit-flag) of enum values,
 you can't use
      // "==" to compare them.
      if ( (e->State & DrawItemState::Selected) == DrawItemState::Selected
 )
            brush = SystemBrushes::HighlightText;
      else
            brush = foreColorBrush;

      // Perform the painting.
      System::Drawing::Font^ font = (dynamic_cast<ListBoxFontItem^>(listBox1->Items[
 e->Index ]))->Font;
      e->DrawBackground();
      e->Graphics->DrawString( font->Name, font, brush, e->Bounds );
      e->DrawFocusRectangle();
   }

public:

   /// <summary>
   ///  A wrapper class for use with storing Fonts in a ListBox.  Since
 ListBox uses the
   ///  ToString() of its items for the text it displays, this class
 is needed to return
   ///  the name of the font, rather than its ToString() value.
   /// </summary>
   ref class ListBoxFontItem
   {
   public:
      System::Drawing::Font^ Font;
      ListBoxFontItem( System::Drawing::Font^ f )
      {
         Font = f;
      }

      virtual String^ ToString() override
      {
         return Font->Name;
      }
   };
};

[STAThread]
int main()
{
   Application::Run( gcnew Form1 );
}
J#
public class Form1 extends System.Windows.Forms.Form
{
    private System.Windows.Forms.ListBox listBox1;
    private System.ComponentModel.Container components = null;

    protected void Dispose(boolean disposing)
    {
        if (disposing) {
            if (components != null) {
                components.Dispose();
            }

            if (foreColorBrush != null) {
                foreColorBrush.Dispose();
            }
        }
        super.Dispose(disposing);
    } //Dispose
      
    #region Windows Form Designer generated code
    /// <summary>
    /// Required method for Designer support - do not modify
    /// the contents of this method with the code editor.
    /// </summary>
    private void InitializeComponent()
    {
        this.listBox1 = new System.Windows.Forms.ListBox();
        this.SuspendLayout();
        // 
        // listBox1
        // 
        this.listBox1.set_DrawMode(
            System.Windows.Forms.DrawMode.OwnerDrawVariable);
        this.listBox1.set_Location(new System.Drawing.Point(16,
 48));
        this.listBox1.set_Name("listBox1");
        this.listBox1.set_SelectionMode(
            System.Windows.Forms.SelectionMode.MultiExtended);
        this.listBox1.set_Size(new System.Drawing.Size(256,
 134));
        this.listBox1.set_TabIndex(0);
        this.listBox1.add_MeasureItem(
            new System.Windows.Forms.MeasureItemEventHandler(
            this.listBox1_MeasureItem));
        this.listBox1.add_DrawItem(
            new System.Windows.Forms.DrawItemEventHandler(
            this.listBox1_DrawItem));
        // 
        // Form1
        // 
        this.set_ClientSize(new System.Drawing.Size(292,
 273));
        this.get_Controls().AddRange(new System.Windows.Forms.Control[]
 
            { this.listBox1 });
        this.set_Name("Form1");
        this.set_Text("Form1");
        this.ResumeLayout(false);
    } //InitializeComponent
    #endregion
      
    /** @attribute STAThread()
     */
    public static void main(String[]
 args)
    {
        Application.Run(new Form1());
    } //main

    private void listBox1_MeasureItem(Object
 sender, 
        System.Windows.Forms.MeasureItemEventArgs e)
    {
        Font font = ((ListBoxFontItem)listBox1.get_Items().
             get_Item(e.get_Index())).font;
        SizeF stringSize = 
            e.get_Graphics().MeasureString(font.get_Name(), font);

        // Set the height and width of the item
        e.set_ItemHeight((int)stringSize.get_Height());
        e.set_ItemWidth((int)stringSize.get_Width());
    } //listBox1_MeasureItem

    // For efficiency, cache the brush to use for drawing.
    private SolidBrush foreColorBrush;

    private void listBox1_DrawItem(Object sender,
 
        System.Windows.Forms.DrawItemEventArgs e)
    {
        Brush brush;

        // Create the brush using the ForeColor specified by the 
        // DrawItemEventArgs
        if (foreColorBrush == null) {
            foreColorBrush = new SolidBrush(e.get_ForeColor());
        }
        else {
            if (!foreColorBrush.get_Color().Equals(e.get_ForeColor()))
 {
                // The control's ForeColor has changed, 
                // so dispose of the cached brush and
                // create a new one.
                foreColorBrush.Dispose();
                foreColorBrush = new SolidBrush(e.get_ForeColor());
            }
        }
        // Select the appropriate brush depending on if the item is
 selected.
        // Since State can be a combinateion (bit-flag) of enum values
,
        // you can't use "==" to compare them.
        if ((e.get_State() & DrawItemState.Selected).
            Equals(DrawItemState.Selected)) {
            brush = SystemBrushes.get_HighlightText();
        }
        else {
            brush = foreColorBrush;
        }

        // Perform the painting.
        Font font = ((ListBoxFontItem)listBox1.get_Items().
            get_Item(e.get_Index())).font;
        e.DrawBackground();
        e.get_Graphics().DrawString(font.get_Name(), font, brush, 
            new PointF((float)e.get_Bounds().get_X(),
 
            (float)e.get_Bounds().get_Y()));
        e.DrawFocusRectangle();
    } //listBox1_DrawItem

    /// <summary>
    ///  A wrapper class for use with storing Fonts in a ListBox.  
    ///  Since ListBox uses the ToString() of its items 
    ///  for the text it displays, this class is needed to return
    ///  the name of the font, rather than its ToString() value.
    /// </summary>
    public class ListBoxFontItem
    {
        public Font font;

        public ListBoxFontItem(Font f)
        {
            set_Font(f);
        } //ListBoxFontItem

        public String ToString()
        {
            return get_Font().get_Name();
        } //ToString
    } //ListBoxFontItem
} //Form1
プラットフォームプラットフォーム

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報バージョン情報
.NET Framework
サポート対象 : 2.0、1.1、1.0
参照参照
関連項目
System.Windows.Forms 名前空間
DrawItemEventArgs クラス

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「DrawItemState 列挙体」の関連用語

1
DrawItemEventArgs.State プロパティ
.NET Framework クラス ライブラリ リファレンス
90% |||||

2
StatusBarDrawItemEventArgs コンストラクタ
.NET Framework クラス ライブラリ リファレンス
78% |||||

3
System.Windows.Forms 名前空間
.NET Framework クラス ライブラリ リファレンス
4% |||||

DrawItemState 列挙体のお隣キーワード

DrawItemEventArgs.Font プロパティ

DrawItemEventArgs.ForeColor プロパティ

DrawItemEventArgs.Graphics プロパティ

DrawItemEventArgs.Index プロパティ

DrawItemEventArgs.State プロパティ

DrawItemEventHandler デリゲート

DrawItemState 列挙体

DrawListViewColumnHeaderEventArgs クラス

DrawListViewColumnHeaderEventArgs コンストラクタ

DrawListViewColumnHeaderEventArgs プロパティ

DrawListViewColumnHeaderEventArgs メソッド

DrawListViewColumnHeaderEventArgs メンバ

DrawListViewColumnHeaderEventArgs.BackColor プロパティ

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