Control.CursorChanged イベントとは何？わかりやすく解説 Weblio辞書

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.NET Framework クラスライブラリリファレンス

索引トップ用語の索引ランキング

Control.CursorChanged イベント

Cursor プロパティの値が変更された場合に発生します。

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

Visual Basic (宣言)

Public Event CursorChanged As
 EventHandler

Visual Basic (使用法)

Dim instance As Control
Dim handler As EventHandler

AddHandler instance.CursorChanged, handler

public event EventHandler CursorChanged

C++

public:
event EventHandler^ CursorChanged {
    void add (EventHandler^ value);
    void remove (EventHandler^ value);
}

/** @event */
public void add_CursorChanged (EventHandler
 value)

/** @event */
public void remove_CursorChanged (EventHandler
 value)

JScript

JScript では、イベントは使用できますが、新規に宣言することはできません。

解説

このイベントは Cursor プロパティがプログラムの変更によって、またはユーザーとの対話によって変更された場合に発生します。

イベント処理の詳細については、「イベントの利用」を参照してください。

使用例

Control.Cursor プロパティ、Cursor クラス、および Cursors クラスを使用して、マウスカーソルを変更するコード例を次に示します。この例では、ComboBox コントロール、Panel コントロール、および ListView コントロールを格納するフォームを作成します。ComboBox には、Cursors クラスによって提供されたすべてのカーソルが格納されています。ユーザーが ComboBox 内でマウスカーソルを選択すると、Control.Cursor プロパティがそのカーソルに設定され、これによって Panel のカーソルが更新されます。ListView は、Control.CursorChanged イベントが発生するたびに更新されます。

Visual Basic

Imports System
Imports System.Drawing
Imports System.Windows.Forms

Namespace MCursor
    
    ' Summary description for Form1.
    Public NotInheritable Class
 Form1
        Inherits System.Windows.Forms.Form

        Friend WithEvents cursorSelectionComboBox
 As System.Windows.Forms.ComboBox
        Friend WithEvents testPanel As
 System.Windows.Forms.Panel

        Private label1 As System.Windows.Forms.Label
        Private label2 As System.Windows.Forms.Label
        Private cursorEventViewer As System.Windows.Forms.ListView
        Private label3 As System.Windows.Forms.Label

        <System.STAThread()> _
        Public Shared Sub
 Main()
            System.Windows.Forms.Application.Run(New Form1)
        End Sub 'Main

        Public Sub New()

            Me.cursorSelectionComboBox = New
 System.Windows.Forms.ComboBox
            Me.testPanel = New System.Windows.Forms.Panel
            Me.label1 = New System.Windows.Forms.Label
            Me.label2 = New System.Windows.Forms.Label
            Me.cursorEventViewer = New System.Windows.Forms.ListView
            Me.label3 = New System.Windows.Forms.Label

            ' Select Cursor Label
            Me.label2.Location = New System.Drawing.Point(24,
 16)
            Me.label2.Size = New System.Drawing.Size(80,
 16)
            Me.label2.Text = "Select cursor:"
            '

            ' Cursor Testing Panel Label
            Me.label1.Location = New System.Drawing.Point(24,
 80)
            Me.label1.Size = New System.Drawing.Size(144,
 23)
            Me.label1.Text = "Cursor testing
 panel:"

            ' Cursor Changed Events Label
            Me.label3.Location = New System.Drawing.Point(184,
 16)
            Me.label3.Size = New System.Drawing.Size(128,
 16)
            Me.label3.Text = "Cursor changed
 events:"

            ' Cursor Selection ComboBox
            Me.cursorSelectionComboBox.Location = New
 System.Drawing.Point(24, 40)
            Me.cursorSelectionComboBox.Size = New
 System.Drawing.Size(152, 21)
            Me.cursorSelectionComboBox.TabIndex = 0

            ' Cursor Test Panel
            Me.testPanel.BackColor = System.Drawing.SystemColors.ControlDark
            Me.testPanel.Location = New System.Drawing.Point(24,
 104)
            Me.testPanel.Size = New System.Drawing.Size(152,
 160)

            ' Cursor Event ListView
            Me.cursorEventViewer.Location = New
 System.Drawing.Point(184, 40)
            Me.cursorEventViewer.Size = New
 System.Drawing.Size(256, 224)
            Me.cursorEventViewer.TabIndex = 4
            Me.cursorEventViewer.View = System.Windows.Forms.View.List

            ' Set up how the form should be displayed and add the controls
 to the form.
            Me.ClientSize = New System.Drawing.Size(456,
 286)
            Me.Controls.AddRange(New System.Windows.Forms.Control()
 {Me.label3, _
                                    Me.cursorEventViewer, Me.label2,
 Me.label1, _
                                    Me.testPanel, Me.cursorSelectionComboBox})

            Me.Text = "Cursors Example"

            ' Add all the cursor types to the combobox.
            Dim cursor As Cursor
            For Each cursor In
 CursorList()
                cursorSelectionComboBox.Items.Add(cursor)
            Next cursor
        End Sub 'New 

        Private Function CursorList() As
 Cursor()
            ' Make an array of all the types of cursors in Windows Forms.
            return New Cursor() {Cursors.AppStarting,
 Cursors.Arrow, Cursors.Cross, _
                                 Cursors.Default, Cursors.Hand, Cursors.Help, _
                                 Cursors.HSplit, Cursors.IBeam, Cursors.No, _
                                 Cursors.NoMove2D, Cursors.NoMoveHoriz, Cursors.NoMoveVert,
 _
                                 Cursors.PanEast, Cursors.PanNE, Cursors.PanNorth,
 _
                                 Cursors.PanNW, Cursors.PanSE, Cursors.PanSouth,
 _
                                 Cursors.PanSW, Cursors.PanWest, Cursors.SizeAll,
 _
                                 Cursors.SizeNESW, Cursors.SizeNS, Cursors.SizeNWSE,
 _
                                 Cursors.SizeWE, Cursors.UpArrow, Cursors.VSplit,
 Cursors.WaitCursor}
        End Function

        Private Sub cursorSelectionComboBox_SelectedIndexChanged(ByVal
 sender As Object, ByVal
 e As System.EventArgs) Handles cursorSelectionComboBox.SelectedIndexChanged
            ' Set the cursor in the test panel to be the selected cursor
 style.
            testPanel.Cursor = CType(cursorSelectionComboBox.SelectedItem, Cursor)

        End Sub 

        Private Sub testPanel_CursorChanged(ByVal
 sender As Object, ByVal
 e As System.EventArgs) Handles testPanel.CursorChanged
            ' Build up a string containing the type of object sending
 the event, and the event.
            Dim cursorEvent As String
 = String.Format("[{0}]: {1}",
 sender.GetType().ToString(), "Cursor changed")

            ' Records this event in the list view.
            Me.cursorEventViewer.Items.Add(cursorEvent)

        End Sub 

    End Class 'Form1
End Namespace 'MCursor

using System;
using System.Drawing;
using System.Windows.Forms;

namespace MCursor
{
    public class Form1 : System.Windows.Forms.Form
    {
        private System.Windows.Forms.ComboBox cursorSelectionComboBox;

        private System.Windows.Forms.Panel testPanel;
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.ListView cursorEventViewer;
        private System.Windows.Forms.Label label3;
        
        [STAThread]
        static void Main() 
        {
            Application.Run(new Form1());
        }

        public Form1()
        {
            this.cursorSelectionComboBox = new
 System.Windows.Forms.ComboBox();
            this.testPanel = new System.Windows.Forms.Panel();
            this.label1 = new System.Windows.Forms.Label();
            this.label2 = new System.Windows.Forms.Label();
            this.cursorEventViewer = new System.Windows.Forms.ListView();
            this.label3 = new System.Windows.Forms.Label();

            // Select Cursor Label
            this.label2.Location = new System.Drawing.Point(24,
 16);
            this.label2.Size = new System.Drawing.Size(80,
 16);
            this.label2.Text = "Select cursor:";

            // Cursor Testing Panel Label
            this.label1.Location = new System.Drawing.Point(24,
 80);
            this.label1.Size = new System.Drawing.Size(144,
 23);
            this.label1.Text = "Cursor testing panel:";

            // Cursor Changed Events Label
            this.label3.Location = new System.Drawing.Point(184,
 16);
            this.label3.Size = new System.Drawing.Size(128,
 16);
            this.label3.Text = "Cursor changed events:";
            
            // Cursor Selection ComboBox
            this.cursorSelectionComboBox.Location = new
 System.Drawing.Point(24, 40);
            this.cursorSelectionComboBox.Size = new
 System.Drawing.Size(152, 21);
            this.cursorSelectionComboBox.TabIndex = 0;
            this.cursorSelectionComboBox.SelectedIndexChanged
 += 
                 new System.EventHandler(this.cursorSelectionComboBox_SelectedIndexChanged);

            // Cursor Test Panel
            this.testPanel.BackColor = System.Drawing.SystemColors.ControlDark;
            this.testPanel.Location = new System.Drawing.Point(24,
 104);
            this.testPanel.Size = new System.Drawing.Size(152,
 160);
            this.testPanel.CursorChanged += new
 System.EventHandler(this.testPanel_CursorChanged);

            // Cursor Event ListView
            this.cursorEventViewer.Location = new
 System.Drawing.Point(184, 40);
            this.cursorEventViewer.Size = new
 System.Drawing.Size(256, 224);
            this.cursorEventViewer.TabIndex = 4;
            this.cursorEventViewer.View = System.Windows.Forms.View.List;

            // Set up how the form should be displayed and add the controls
 to the form.
            this.ClientSize = new System.Drawing.Size(456,
 286);
            this.Controls.AddRange(new System.Windows.Forms.Control[]
 {
                                        this.label3, this.cursorEventViewer
,
                                        this.label2, this.label1
,
                                        this.testPanel, this.cursorSelectionComboBox});

            this.Text = "Cursors Example";

            // Add all the cursor types to the combobox.
            foreach (Cursor cursor in CursorList())
            {
                cursorSelectionComboBox.Items.Add(cursor);
            }
        
        }

        private Cursor [] CursorList()
        {

            // Make an array of all the types of cursors in Windows
 Forms.
            return new Cursor [] {
                                     Cursors.AppStarting, Cursors.Arrow, Cursors.Cross
,
                                     Cursors.Default, Cursors.Hand, Cursors.Help
,
                                     Cursors.HSplit, Cursors.IBeam, Cursors.No,
                                     Cursors.NoMove2D, Cursors.NoMoveHoriz, Cursors.NoMoveVert
,
                                     Cursors.PanEast, Cursors.PanNE, Cursors.PanNorth
,
                                     Cursors.PanNW, Cursors.PanSE, Cursors.PanSouth
,
                                     Cursors.PanSW, Cursors.PanWest, Cursors.SizeAll
,
                                     Cursors.SizeNESW, Cursors.SizeNS, Cursors.SizeNWSE
,
                                     Cursors.SizeWE, Cursors.UpArrow, Cursors.VSplit,
 Cursors.WaitCursor};

        }

        private void cursorSelectionComboBox_SelectedIndexChanged(object
 sender, System.EventArgs e)
        {
            // Set the cursor in the test panel to be the selected cursor
 style.
            testPanel.Cursor = (Cursor)cursorSelectionComboBox.SelectedItem;
        }

        private void testPanel_CursorChanged(object
 sender, System.EventArgs e)
        {
            // Build up a string containing the type of object sending
 the event, and the event.
            string cursorEvent = string.Format("[{0}]:
 {1}", sender.GetType().ToString(), "Cursor changed");          
      
        
            // Record this event in the list view.
            this.cursorEventViewer.Items.Add(cursorEvent);
        }
    }
}

C++

#using <System.dll>
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>

using namespace System;
using namespace System::Drawing;
using namespace System::Windows::Forms;

namespace MCursor
{
   public ref class Form1: public
 System::Windows::Forms::Form
   {
   private:
      System::Windows::Forms::ComboBox^ cursorSelectionComboBox;
      System::Windows::Forms::Panel^ testPanel;
      System::Windows::Forms::Label ^ label1;
      System::Windows::Forms::Label ^ label2;
      System::Windows::Forms::ListView^ cursorEventViewer;
      System::Windows::Forms::Label ^ label3;

   public:
      Form1()
      {
         this->cursorSelectionComboBox = gcnew System::Windows::Forms::ComboBox;
         this->testPanel = gcnew System::Windows::Forms::Panel;
         this->label1 = gcnew System::Windows::Forms::Label;
         this->label2 = gcnew System::Windows::Forms::Label;
         this->cursorEventViewer = gcnew System::Windows::Forms::ListView;
         this->label3 = gcnew System::Windows::Forms::Label;
         
         // Select Cursor Label
         this->label2->Location = System::Drawing::Point(
 24, 16 );
         this->label2->Size = System::Drawing::Size( 80,
 16 );
         this->label2->Text = "Select cursor:";
         
         // Cursor Testing Panel Label
         this->label1->Location = System::Drawing::Point(
 24, 80 );
         this->label1->Size = System::Drawing::Size( 144,
 23 );
         this->label1->Text = "Cursor testing panel:";
         
         // Cursor Changed Events Label
         this->label3->Location = System::Drawing::Point(
 184, 16 );
         this->label3->Size = System::Drawing::Size( 128,
 16 );
         this->label3->Text = "Cursor changed events:";
         
         // Cursor Selection ComboBox
         this->cursorSelectionComboBox->Location = System::Drawing::Point(
 24, 40 );
         this->cursorSelectionComboBox->Size = System::Drawing::Size(
 152, 21 );
         this->cursorSelectionComboBox->TabIndex = 0;
         this->cursorSelectionComboBox->SelectedIndexChanged
 += gcnew System::EventHandler( this, &Form1::cursorSelectionComboBox_SelectedIndexChanged
 );
         
         // Cursor Test Panel
         this->testPanel->BackColor = System::Drawing::SystemColors::ControlDark;
         this->testPanel->Location = System::Drawing::Point(
 24, 104 );
         this->testPanel->Size = System::Drawing::Size(
 152, 160 );
         this->testPanel->CursorChanged += gcnew System::EventHandler(
 this, &Form1::testPanel_CursorChanged );
         
         // Cursor Event ListView
         this->cursorEventViewer->Location = System::Drawing::Point(
 184, 40 );
         this->cursorEventViewer->Size = System::Drawing::Size(
 256, 224 );
         this->cursorEventViewer->TabIndex = 4;
         this->cursorEventViewer->View = System::Windows::Forms::View::List;
         
         // Set up how the form should be displayed and add the controls
 to the form.
         this->ClientSize = System::Drawing::Size( 456, 286
 );
         array<System::Windows::Forms::Control^>^temp0 = {this->label3
,this->cursorEventViewer,this->label2
,this->label1,this->testPanel,this->cursorSelectionComboBox};
         this->Controls->AddRange( temp0 );
         this->Text = "Cursors Example";
         
         // Add all the cursor types to the combobox.
         System::Collections::IEnumerator^ myEnum = CursorList()->GetEnumerator();
         while ( myEnum->MoveNext() )
         {
            System::Windows::Forms::Cursor^ cursor = safe_cast<System::Windows::Forms::Cursor^>(myEnum->Current);
            cursorSelectionComboBox->Items->Add( cursor );
         }
      }


   private:
      array<System::Windows::Forms::Cursor^>^ CursorList()
      {
         
         // Make an array of all the types of cursors in Windows Forms.
         array<System::Windows::Forms::Cursor^>^temp1 = {Cursors::AppStarting
,Cursors::Arrow,Cursors::Cross,Cursors::Default,Cursors::Hand,Cursors::Help,Cursors::HSplit
,Cursors::IBeam,Cursors::No,Cursors::NoMove2D,Cursors::NoMoveHoriz,Cursors::NoMoveVert,Cursors::PanEast,Cursors::PanNE,Cursors::PanNorth,Cursors::PanNW,Cursors::PanSE
,Cursors::PanSouth,Cursors::PanSW,Cursors::PanWest,Cursors::SizeAll,Cursors::SizeNESW,Cursors::SizeNS,Cursors::SizeNWSE,Cursors::SizeWE,Cursors::UpArrow,Cursors::VSplit,Cursors::WaitCursor};
         return temp1;
      }

      void cursorSelectionComboBox_SelectedIndexChanged( Object^
 /*sender*/, System::EventArgs^ /*e*/ )
      {
         
         // Set the cursor in the test panel to be the selected cursor
 style.
         testPanel->Cursor = dynamic_cast<System::Windows::Forms::Cursor^>(cursorSelectionComboBox->SelectedItem);
      }

      void testPanel_CursorChanged( Object^ sender, System::EventArgs^
 /*e*/ )
      {
         
         // Build up a String* containing the type of Object* sending
 the event, and the event.
         String^ cursorEvent = String::Format( "[{0}]: {1}", sender->GetType(),
 "Cursor changed" );
         
         // Record this event in the list view.
         this->cursorEventViewer->Items->Add( cursorEvent
 );
      }

   };

}


[STAThread]
int main()
{
   Application::Run( gcnew MCursor::Form1 );
}

package MCursor;

import System.*;
import System.Drawing.*;
import System.Windows.Forms.*;
import System.Collections.*;

public class Form1 extends System.Windows.Forms.Form
{
    private System.Windows.Forms.ComboBox cursorSelectionComboBox;
    private System.Windows.Forms.Panel testPanel;
    private System.Windows.Forms.Label label1;
    private System.Windows.Forms.Label label2;
    private System.Windows.Forms.ListView cursorEventViewer;
    private System.Windows.Forms.Label label3;

    /** @attribute STAThread()
     */
    public static void main(String[]
 args)
    {
        Application.Run(new Form1());
    } //main

    public Form1()
    {
        this.cursorSelectionComboBox = new
 System.Windows.Forms.ComboBox();
        this.testPanel = new System.Windows.Forms.Panel();
        this.label1 = new System.Windows.Forms.Label();
        this.label2 = new System.Windows.Forms.Label();
        this.cursorEventViewer = new System.Windows.Forms.ListView();
        this.label3 = new System.Windows.Forms.Label();
        // Select Cursor Label
        this.label2.set_Location(new System.Drawing.Point(24,
 16));
        this.label2.set_Size(new System.Drawing.Size(80,
 16));
        this.label2.set_Text("Select cursor:");
        // Cursor Testing Panel Label
        this.label1.set_Location(new System.Drawing.Point(24,
 80));
        this.label1.set_Size(new System.Drawing.Size(144,
 23));
        this.label1.set_Text("Cursor testing panel:");
        // Cursor Changed Events Label
        this.label3.set_Location(new System.Drawing.Point(184,
 16));
        this.label3.set_Size(new System.Drawing.Size(128,
 16));
        this.label3.set_Text("Cursor changed events:");
        // Cursor Selection ComboBox
        this.cursorSelectionComboBox.set_Location(
            new System.Drawing.Point(24, 40));
        this.cursorSelectionComboBox.set_Size(
            new System.Drawing.Size(152, 21));
        this.cursorSelectionComboBox.set_TabIndex(0);
        this.cursorSelectionComboBox.add_SelectedIndexChanged(
            new System.EventHandler(
            this.cursorSelectionComboBox_SelectedIndexChanged));
        // Cursor Test Panel
        this.testPanel.set_BackColor(
            System.Drawing.SystemColors.get_ControlDark());
        this.testPanel.set_Location(new System.Drawing.Point(24,
 104));
        this.testPanel.set_Size(new System.Drawing.Size(152,
 160));
        this.testPanel.add_CursorChanged(new
 System.EventHandler(
            this.testPanel_CursorChanged));
        // Cursor Event ListView
        this.cursorEventViewer.set_Location(new
 System.Drawing.Point(184, 40));
        this.cursorEventViewer.set_Size(new
 System.Drawing.Size(256, 224));
        this.cursorEventViewer.set_TabIndex(4);
        this.cursorEventViewer.set_View(System.Windows.Forms.View.List);
        // Set up how the form should be displayed and add the controls
 to the 
        // form.
        this.set_ClientSize(new System.Drawing.Size(456,
 286));
        this.get_Controls().AddRange(new System.Windows.Forms.Control[]
 { 
            this.label3, this.cursorEventViewer,
 this.label2, this.label1,
            this.testPanel, this.cursorSelectionComboBox
 });

        this.set_Text("Cursors Example");

        IEnumerator myEnum = CursorList().GetEnumerator();
        // Add all the cursor types to the combobox.
        while (myEnum.MoveNext()) {
            Cursor cursor = ( Cursor)myEnum.get_Current();
            cursorSelectionComboBox.get_Items().Add(cursor);
        }
    } //Form1

    private Cursor[] CursorList()
    {
        // Make an array of all the types of cursors in Windows Forms.
        return new Cursor[] { Cursors.get_AppStarting(),
 Cursors.get_Arrow(), 
            Cursors.get_Cross(), Cursors.get_Default(), Cursors.get_Hand(), 
            Cursors.get_Help(), Cursors.get_HSplit(), Cursors.get_IBeam(), 
            Cursors.get_No(), Cursors.get_NoMove2D(), Cursors.get_NoMoveHoriz(),
 
            Cursors.get_NoMoveVert(), Cursors.get_PanEast(), 
            Cursors.get_PanNE(), Cursors.get_PanNorth(), Cursors.get_PanNW(),
            Cursors.get_PanSE(), Cursors.get_PanSouth(), Cursors.get_PanSW(),
            Cursors.get_PanWest(), Cursors.get_SizeAll(), 
            Cursors.get_SizeNESW(), Cursors.get_SizeNS(), 
            Cursors.get_SizeNWSE(), Cursors.get_SizeWE(), 
            Cursors.get_UpArrow(), Cursors.get_VSplit(), 
            Cursors.get_WaitCursor() };
    } //CursorList

    private void cursorSelectionComboBox_SelectedIndexChanged(Object
 sender,
        System.EventArgs e)
    {
        // Set the cursor in the test panel to be the selected cursor
 style.
        testPanel.set_Cursor((Cursor)(cursorSelectionComboBox.
            get_SelectedItem()));
    } //cursorSelectionComboBox_SelectedIndexChanged

    private void testPanel_CursorChanged(Object
 sender, System.EventArgs e)
    {
        // Build up a string containing the type of object sending the
 event, 
        // and the event.
        String cursorEvent = String.Format("[{0}]: {1}", 
               sender.GetType().ToString(), "Cursor changed");
        // Record this event in the list view.
        this.cursorEventViewer.get_Items().Add(cursorEvent);
    } //testPanel_CursorChanged
} //Form1

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

.NET Framework
サポート対象 : 2.0、1.1、1.0

参照

関連項目
Control クラス
Control メンバ
System.Windows.Forms 名前空間
OnCursorChanged
Control.Cursor プロパティ
Cursor

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Control.CursorChanged イベントとは？ わかりやすく解説

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Control.CursorChanged イベントとは？わかりやすく解説