Control.MouseHover イベント

.NET Framework クラス ライブラリ リファレンス

Control.MouseHover イベント

マウス ポインタをコントロールの上に重ねると発生します。

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 MouseHover As
 EventHandler

Visual Basic (使用法)

Dim instance As Control
Dim handler As EventHandler

AddHandler instance.MouseHover, handler

C#

public event EventHandler MouseHover

C++

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

J#

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

/** @event */
public void remove_MouseHover (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

MouseHover の一般的な使用例は、コントロールの周りの指定された領域 ("ホバー四角形") 内でマウスが一時停止したときに、ツールヒントを表示することです。このイベントを発生させるために必要な一時停止は、MouseHoverTime プロパティによってミリ秒単位で指定されます。

MouseHover イベントは、MouseHoverSize プロパティおよび MouseHoverTime プロパティに関連して定義および検出されます。

マウス イベントは次の順序で発生します。

1. MouseEnter

2. MouseMove

3. MouseHover / MouseDown / MouseWheel

4. MouseUp

5. MouseLeave

メモ
Click、DoubleClick、MouseDown、MouseUp、MouseHover、MouseEnter、MouseLeave、MouseMove の各イベントは、TabControl.TabPages コレクションに 1 つ以上の TabPage が存在しない限り、TabControl クラスで生成されません。コレクションに 1 つ以上の TabPage があり、ユーザーがタブ コントロールのヘッダー (TabPage の名前が表示される場所) と対話すると、TabControl が適切なイベントを発生させます。ただし、ユーザーとの対話がタブ ページのクライアント領域内の場合、TabPage は該当するイベントを発生させます。

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

さまざまなマウス イベントを使用して、Panel にマウスの軌跡を描画する方法を次のコード例に示します。MouseMove イベントおよび MouseDown イベントが発生するごとに、線分が GraphicsPath に追加されます。グラフィックを更新するために、各 MouseDown イベントおよび各 MouseUp イベントで、Panel に対して Invalidate メソッドが呼び出されます。さらに、グラフィック パスは、MouseWheel イベントが発生したときに上または下にスクロールされます。MouseHover などの、追加のマウス イベントも画面上で識別されます。画面には、SystemInformation クラスからのマウスに関する追加情報も表示されます。

Visual Basic

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

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

        Friend WithEvents panel1 As
 System.Windows.Forms.Panel
        Private label1 As System.Windows.Forms.Label
        Private label2 As System.Windows.Forms.Label
        Private label3 As System.Windows.Forms.Label
        Private label4 As System.Windows.Forms.Label
        Private label5 As System.Windows.Forms.Label
        Private label6 As System.Windows.Forms.Label
        Private label7 As System.Windows.Forms.Label
        Private label8 As System.Windows.Forms.Label
        Private label9 As System.Windows.Forms.Label
        Friend WithEvents clearButton As
 System.Windows.Forms.Button
        Private mousePath As System.Drawing.Drawing2D.GraphicsPath
        Private groupBox1 As System.Windows.Forms.GroupBox

        Private fontSize As Integer
 = 20
        
        <System.STAThread()>  _
        Public Shared Sub
 Main()
            System.Windows.Forms.Application.Run(New Form1())
        End Sub 'Main

        Public Sub New()

            mousePath = New System.Drawing.Drawing2D.GraphicsPath()

            Me.panel1 = New System.Windows.Forms.Panel()
            Me.label1 = New System.Windows.Forms.Label()
            Me.clearButton = New System.Windows.Forms.Button()
            Me.label2 = New System.Windows.Forms.Label()
            Me.label3 = New System.Windows.Forms.Label()
            Me.label4 = New System.Windows.Forms.Label()
            Me.label5 = New System.Windows.Forms.Label()
            Me.label6 = New System.Windows.Forms.Label()
            Me.label7 = New System.Windows.Forms.Label()
            Me.label8 = New System.Windows.Forms.Label()
            Me.label9 = New System.Windows.Forms.Label()
            Me.groupBox1 = New System.Windows.Forms.GroupBox()

            ' Mouse Events Label
            Me.label1.Location = New System.Drawing.Point(24,
 504) 
            Me.label1.Size = New System.Drawing.Size(392,
 23) 
            ' DoubleClickSize Label
            Me.label2.AutoSize = True 
            Me.label2.Location = New System.Drawing.Point(24,
 48) 
            Me.label2.Size = New System.Drawing.Size(35,
 13) 
            ' DoubleClickTime Label
            Me.label3.AutoSize = True 
            Me.label3.Location = New System.Drawing.Point(24,
 72) 
            Me.label3.Size = New System.Drawing.Size(35,
 13) 
            ' MousePresent Label
            Me.label4.AutoSize = True 
            Me.label4.Location = New System.Drawing.Point(24,
 96) 
            Me.label4.Size = New System.Drawing.Size(35,
 13) 
            ' MouseButtons Label
            Me.label5.AutoSize = True 
            Me.label5.Location = New System.Drawing.Point(24,
 120) 
            Me.label5.Size = New System.Drawing.Size(35,
 13) 
            ' MouseButtonsSwapped Label
            Me.label6.AutoSize = True 
            Me.label6.Location = New System.Drawing.Point(320,
 48) 
            Me.label6.Size = New System.Drawing.Size(35,
 13) 
            ' MouseWheelPresent Label
            Me.label7.AutoSize = True 
            Me.label7.Location = New System.Drawing.Point(320,
 72) 
            Me.label7.Size = New System.Drawing.Size(35,
 13) 
            ' MouseWheelScrollLines Label
            Me.label8.AutoSize = True 
            Me.label8.Location = New System.Drawing.Point(320,
 96) 
            Me.label8.Size = New System.Drawing.Size(35,
 13) 
            ' NativeMouseWheelSupport Label
            Me.label9.AutoSize = True 
            Me.label9.Location = New System.Drawing.Point(320,
 120) 
            Me.label9.Size = New System.Drawing.Size(35,
 13) 

            ' Mouse Panel
            Me.panel1.Anchor = System.Windows.Forms.AnchorStyles.Top
 Or _
                                    System.Windows.Forms.AnchorStyles.Left Or
 _
                                    System.Windows.Forms.AnchorStyles.Right
            Me.panel1.BackColor = System.Drawing.SystemColors.ControlDark
            Me.panel1.Location = New System.Drawing.Point(16,
 160)
            Me.panel1.Size = New System.Drawing.Size(664,
 320)

            ' Clear Button
            Me.clearButton.Anchor = System.Windows.Forms.AnchorStyles.Top
 Or _
                                    System.Windows.Forms.AnchorStyles.Right
            Me.clearButton.Location = New System.Drawing.Point(592,
 504)
            Me.clearButton.TabIndex = 1
            Me.clearButton.Text = "Clear"

            ' GroupBox
            Me.groupBox1.Anchor = System.Windows.Forms.AnchorStyles.Top
 Or _
                                  System.Windows.Forms.AnchorStyles.Left Or
 _
                                  System.Windows.Forms.AnchorStyles.Right
            Me.groupBox1.Location = New System.Drawing.Point(16,
 24)
            Me.groupBox1.Size = New System.Drawing.Size(664,
 128)
            Me.groupBox1.Text = "System.Windows.Forms.SystemInformation"

            ' Set up how the form should be displayed and add the controls
 to the form.
            Me.ClientSize = New System.Drawing.Size(696,
 534)
            Me.Controls.AddRange(New System.Windows.Forms.Control()
 {Me.label9, _
                            Me.label8, Me.label7,
 Me.label6, Me.label5, Me.label4,
 _
                            Me.label3, Me.label2,
 Me.clearButton, Me.panel1, Me.label1,
 Me.groupBox1})

            Me.Text = "Mouse Event Example"

            ' Display information about the system mouse.
            label2.Text = "SystemInformation.DoubleClickSize:
 " + SystemInformation.DoubleClickSize.ToString()
            label3.Text = "SystemInformation.DoubleClickTime:
 " + SystemInformation.DoubleClickTime.ToString()
            label4.Text = "SystemInformation.MousePresent: "
 + SystemInformation.MousePresent.ToString()
            label5.Text = "SystemInformation.MouseButtons: "
 + SystemInformation.MouseButtons.ToString()
            label6.Text = "SystemInformation.MouseButtonsSwapped:
 " + SystemInformation.MouseButtonsSwapped.ToString()
            label7.Text = "SystemInformation.MouseWheelPresent:
 " + SystemInformation.MouseWheelPresent.ToString()
            label8.Text = "SystemInformation.MouseWheelScrollLines:
 " + SystemInformation.MouseWheelScrollLines.ToString()
            label9.Text = "SystemInformation.NativeMouseWheelSupport:
 " + SystemInformation.NativeMouseWheelSupport.ToString()
        End Sub 'New

        Private Sub panel1_MouseDown(sender
 As Object, e As System.Windows.Forms.MouseEventArgs)
 Handles panel1.MouseDown
            ' Update the mouse path with the mouse information
            Dim mouseDownLocation As New
 Point(e.X, e.Y)
            
            Dim eventString As String
 = Nothing
            Select Case e.Button
                Case MouseButtons.Left
                    eventString = "L"
                Case MouseButtons.Right
                    eventString = "R"
                Case MouseButtons.Middle
                    eventString = "M"
                Case MouseButtons.XButton1
                    eventString = "X1"
                Case MouseButtons.XButton2
                    eventString = "X2"
                Case MouseButtons.None:
                     eventString = Nothing              
            End Select
            
            If Not (eventString Is
 Nothing) Then
                mousePath.AddString(eventString, FontFamily.GenericSerif, CInt(FontStyle.Bold),
 fontSize, mouseDownLocation, StringFormat.GenericDefault)
            Else
                mousePath.AddLine(mouseDownLocation, mouseDownLocation)
            End If

            panel1.Focus()
            panel1.Invalidate()
        End Sub 
        
        Private Sub panel1_MouseEnter(sender
 As Object, e As System.EventArgs)
 Handles panel1.MouseEnter
            ' Update the mouse event label to indicate the MouseEnter
 event occurred.
            label1.Text = sender.GetType().ToString() + ": MouseEnter"
        End Sub
        
        Private Sub panel1_MouseHover(sender
 As Object, e As System.EventArgs)
 Handles panel1.MouseHover
            ' Update the mouse event label to indicate the MouseHover
 event occurred.
            label1.Text = sender.GetType().ToString() + ": MouseHover"
        End Sub
        
        Private Sub panel1_MouseLeave(sender
 As Object, e As System.EventArgs)
 Handles panel1.MouseLeave
            ' Update the mouse event label to indicate the MouseLeave
 event occurred.
            label1.Text = sender.GetType().ToString() + ": MouseLeave"
        End Sub
        
        Private Sub panel1_MouseMove(sender
 As Object, e As System.Windows.Forms.MouseEventArgs)
 Handles panel1.MouseMove
            ' Update the mouse path that is drawn onto the Panel.
            Dim mouseX As Integer
 = e.X
            Dim mouseY As Integer
 = e.Y
            
            mousePath.AddLine(mouseX, mouseY, mouseX, mouseY)
        End Sub
        Private Sub panel1_MouseWheel(sender
 As Object, e As System.Windows.Forms.MouseEventArgs)
 Handles panel1.MouseWheel
            ' Update the drawing based upon the mouse wheel scrolling.
            Dim numberOfTextLinesToMove As
 Integer = e.Delta * SystemInformation.MouseWheelScrollLines
 / 120 ' WHEEL_DATA
            Dim numberOfPixelsToMove As Integer
 = numberOfTextLinesToMove * fontSize
            
            If numberOfPixelsToMove <> 0 Then
                Dim translateMatrix As New
 System.Drawing.Drawing2D.Matrix()
                translateMatrix.Translate(0, numberOfPixelsToMove)
                mousePath.Transform(translateMatrix)
            End If

            panel1.Invalidate()
        End Sub
        Private Sub panel1_MouseUp(sender As
 Object, e As System.Windows.Forms.MouseEventArgs)
 Handles panel1.MouseUp
            Dim mouseUpLocation = New System.Drawing.Point(e.X,
 e.Y)
            
            ' Show the number of clicks in the path graphic.
            Dim numberOfClicks As Integer
 = e.Clicks
            mousePath.AddString("     " + numberOfClicks.ToString(),
 _
                                FontFamily.GenericSerif, CInt(FontStyle.Bold), _
                                fontSize, mouseUpLocation, StringFormat.GenericDefault)

            panel1.Invalidate()
        End Sub
        
        Private Sub panel1_Paint(sender As
 Object, e As System.Windows.Forms.PaintEventArgs)
 Handles panel1.Paint
            ' Perform the painting of the Panel.
            e.Graphics.DrawPath(System.Drawing.Pens.DarkRed, mousePath)
        End Sub
        
        Private Sub clearButton_Click(sender
 As Object, e As System.EventArgs)
 Handles clearButton.Click
            ' Clear the Panel display.
            mousePath.Dispose()
            mousePath = New System.Drawing.Drawing2D.GraphicsPath()
            panel1.Invalidate()
        End Sub
        
    End Class 'Form1
End Namespace

C#

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

namespace MouseEvent
{
    public class Form1 : System.Windows.Forms.Form
    {
        private System.Windows.Forms.Panel panel1;
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.Label label3;
        private System.Windows.Forms.Label label4;
        private System.Windows.Forms.Label label5;
        private System.Windows.Forms.Label label6;
        private System.Windows.Forms.Label label7;
        private System.Windows.Forms.Label label8;
        private System.Windows.Forms.Label label9;
        private System.Windows.Forms.Button clearButton;
        private System.Drawing.Drawing2D.GraphicsPath mousePath;
        private System.Windows.Forms.GroupBox groupBox1;

        private int fontSize = 20;        

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

        public Form1()
        {            
            mousePath = new System.Drawing.Drawing2D.GraphicsPath();

            this.panel1 = new System.Windows.Forms.Panel();
            this.label1 = new System.Windows.Forms.Label();
            this.clearButton = new System.Windows.Forms.Button();
            this.label2 = new System.Windows.Forms.Label();
            this.label3 = new System.Windows.Forms.Label();
            this.label4 = new System.Windows.Forms.Label();
            this.label5 = new System.Windows.Forms.Label();
            this.label6 = new System.Windows.Forms.Label();
            this.label7 = new System.Windows.Forms.Label();
            this.label8 = new System.Windows.Forms.Label();
            this.label9 = new System.Windows.Forms.Label();
            this.groupBox1 = new System.Windows.Forms.GroupBox();

            // Mouse Events Label
            this.label1.Location = new System.Drawing.Point(24,
 504);
            this.label1.Size = new System.Drawing.Size(392,
 23);
            // DoubleClickSize Label
            this.label2.AutoSize = true;
            this.label2.Location = new System.Drawing.Point(24,
 48);
            this.label2.Size = new System.Drawing.Size(35,
 13);
            // DoubleClickTime Label
            this.label3.AutoSize = true;
            this.label3.Location = new System.Drawing.Point(24,
 72);
            this.label3.Size = new System.Drawing.Size(35,
 13);
            // MousePresent Label
            this.label4.AutoSize = true;
            this.label4.Location = new System.Drawing.Point(24,
 96);
            this.label4.Size = new System.Drawing.Size(35,
 13);
            // MouseButtons Label
            this.label5.AutoSize = true;
            this.label5.Location = new System.Drawing.Point(24,
 120);
            this.label5.Size = new System.Drawing.Size(35,
 13);
            // MouseButtonsSwapped Label
            this.label6.AutoSize = true;
            this.label6.Location = new System.Drawing.Point(320,
 48);
            this.label6.Size = new System.Drawing.Size(35,
 13);
            // MouseWheelPresent Label
            this.label7.AutoSize = true;
            this.label7.Location = new System.Drawing.Point(320,
 72);
            this.label7.Size = new System.Drawing.Size(35,
 13);
            // MouseWheelScrollLines Label
            this.label8.AutoSize = true;
            this.label8.Location = new System.Drawing.Point(320,
 96);
            this.label8.Size = new System.Drawing.Size(35,
 13);
            // NativeMouseWheelSupport Label
            this.label9.AutoSize = true;
            this.label9.Location = new System.Drawing.Point(320,
 120);
            this.label9.Size = new System.Drawing.Size(35,
 13);

            // Mouse Panel
            this.panel1.Anchor = ((System.Windows.Forms.AnchorStyles.Top
 | System.Windows.Forms.AnchorStyles.Left) 
                | System.Windows.Forms.AnchorStyles.Right);
            this.panel1.BackColor = System.Drawing.SystemColors.ControlDark;
            this.panel1.Location = new System.Drawing.Point(16,
 160);
            this.panel1.Size = new System.Drawing.Size(664,
 320);
            this.panel1.MouseUp += new System.Windows.Forms.MouseEventHandler(this.panel1_MouseUp);
            this.panel1.Paint += new System.Windows.Forms.PaintEventHandler(this.panel1_Paint);
            this.panel1.MouseEnter += new System.EventHandler(this.panel1_MouseEnter);
            this.panel1.MouseHover += new System.EventHandler(this.panel1_MouseHover);
            this.panel1.MouseMove += new System.Windows.Forms.MouseEventHandler(this.panel1_MouseMove);
            this.panel1.MouseLeave += new System.EventHandler(this.panel1_MouseLeave);
            this.panel1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.panel1_MouseDown);
            this.panel1.MouseWheel += new System.Windows.Forms.MouseEventHandler(this.panel1_MouseWheel);

            // Clear Button
            this.clearButton.Anchor = (System.Windows.Forms.AnchorStyles.Top
 | System.Windows.Forms.AnchorStyles.Right);
            this.clearButton.Location = new
 System.Drawing.Point(592, 504);
            this.clearButton.TabIndex = 1;
            this.clearButton.Text = "Clear";
            this.clearButton.Click += new System.EventHandler(this.clearButton_Click);
            
            // GroupBox
            this.groupBox1.Anchor = ((System.Windows.Forms.AnchorStyles.Top
 | System.Windows.Forms.AnchorStyles.Left) 
                | System.Windows.Forms.AnchorStyles.Right);
            this.groupBox1.Location = new System.Drawing.Point(16,
 24);
            this.groupBox1.Size = new System.Drawing.Size(664,
 128);
            this.groupBox1.Text = "System.Windows.Forms.SystemInformation";

            // Set up how the form should be displayed and add the controls
 to the form.
            this.ClientSize = new System.Drawing.Size(696,
 534);
            this.Controls.AddRange(new System.Windows.Forms.Control[]
 {
                                        this.label9,this.label8
,this.label7,this.label6,
                                        this.label5,this.label4
,this.label3,this.label2,
                                        this.clearButton,this.panel1
,this.label1,this.groupBox1});
            this.Text = "Mouse Event Example";

            // Displays information about the system mouse.
            label2.Text = "SystemInformation.DoubleClickSize: " + SystemInformation.DoubleClickSize.ToString();
            label3.Text = "SystemInformation.DoubleClickTime: " + SystemInformation.DoubleClickTime.ToString();
            label4.Text = "SystemInformation.MousePresent: " + SystemInformation.MousePresent.ToString();
            label5.Text = "SystemInformation.MouseButtons: " + SystemInformation.MouseButtons.ToString();
            label6.Text = "SystemInformation.MouseButtonsSwapped: " + SystemInformation.MouseButtonsSwapped.ToString();
            label7.Text = "SystemInformation.MouseWheelPresent: " + SystemInformation.MouseWheelPresent.ToString();
            label8.Text = "SystemInformation.MouseWheelScrollLines: " +
 SystemInformation.MouseWheelScrollLines.ToString();
            label9.Text = "SystemInformation.NativeMouseWheelSupport: "
 + SystemInformation.NativeMouseWheelSupport.ToString();

        }

        private void panel1_MouseDown(object
 sender, System.Windows.Forms.MouseEventArgs e) 
        {
            // Update the mouse path with the mouse information
            Point mouseDownLocation = new Point(e.X, e.Y);

            string eventString = null;
            switch (e.Button) {
                case MouseButtons.Left:
                    eventString = "L";
                    break;
                case MouseButtons.Right:
                    eventString = "R";
                    break;
                case MouseButtons.Middle:
                    eventString = "M";
                    break;
                case MouseButtons.XButton1:
                    eventString = "X1";
                    break;
                case MouseButtons.XButton2:
                    eventString = "X2";
                    break;
                case MouseButtons.None:
                default:
                    break;
            }

            if (eventString != null) 
            {
                mousePath.AddString(eventString, FontFamily.GenericSerif, (int)FontStyle.Bold,
 fontSize, mouseDownLocation, StringFormat.GenericDefault);
            }
            else 
            {
                mousePath.AddLine(mouseDownLocation,mouseDownLocation);
            }
            panel1.Focus();
            panel1.Invalidate();
        }

        private void panel1_MouseEnter(object
 sender, System.EventArgs e) 
        {
            // Update the mouse event label to indicate the MouseEnter
 event occurred.
            label1.Text = sender.GetType().ToString() + ": MouseEnter";
        }

        private void panel1_MouseHover(object
 sender, System.EventArgs e) 
        {
            // Update the mouse event label to indicate the MouseHover
 event occurred.
            label1.Text = sender.GetType().ToString() + ": MouseHover";
        }

        private void panel1_MouseLeave(object
 sender, System.EventArgs e) 
        {
            // Update the mouse event label to indicate the MouseLeave
 event occurred.
            label1.Text = sender.GetType().ToString() + ": MouseLeave";
        }

        private void panel1_MouseMove(object
 sender, System.Windows.Forms.MouseEventArgs e)
        {
            // Update the mouse path that is drawn onto the Panel.
            int mouseX = e.X;
            int mouseY = e.Y;
            
            mousePath.AddLine(mouseX,mouseY,mouseX,mouseY);
        }

        private void panel1_MouseWheel(object
 sender, System.Windows.Forms.MouseEventArgs e)
        {
            // Update the drawing based upon the mouse wheel scrolling.
      
            int numberOfTextLinesToMove = e.Delta * SystemInformation.MouseWheelScrollLines
 / 120;
            int numberOfPixelsToMove = numberOfTextLinesToMove
 * fontSize;

            if (numberOfPixelsToMove != 0) {
                System.Drawing.Drawing2D.Matrix translateMatrix = new
  System.Drawing.Drawing2D.Matrix();
                translateMatrix.Translate(0, numberOfPixelsToMove);
                mousePath.Transform(translateMatrix);
            }
            panel1.Invalidate();
        }
        private void panel1_MouseUp(object
 sender, System.Windows.Forms.MouseEventArgs e) 
        {
            Point mouseUpLocation = new System.Drawing.Point(e.X,
 e.Y);
        
            // Show the number of clicks in the path graphic.
            int numberOfClicks = e.Clicks;
            mousePath.AddString("    " + numberOfClicks.ToString(), 
                        FontFamily.GenericSerif, (int)FontStyle.Bold,
 
                        fontSize, mouseUpLocation, StringFormat.GenericDefault);

            panel1.Invalidate();
        }

        private void panel1_Paint(object sender,
 System.Windows.Forms.PaintEventArgs e) 
        {    
            // Perform the painting of the Panel.
            e.Graphics.DrawPath(System.Drawing.Pens.DarkRed, mousePath);
        }

        private void clearButton_Click(object
 sender, System.EventArgs e)
        {
            // Clear the Panel display.
            mousePath.Dispose();
            mousePath = new System.Drawing.Drawing2D.GraphicsPath();
            panel1.Invalidate();
        }
    }
}

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 MouseEvent
{
   public ref class Form1: public
 System::Windows::Forms::Form
   {
   private:
      System::Windows::Forms::Panel^ panel1;
      System::Windows::Forms::Label ^ label1;
      System::Windows::Forms::Label ^ label2;
      System::Windows::Forms::Label ^ label3;
      System::Windows::Forms::Label ^ label4;
      System::Windows::Forms::Label ^ label5;
      System::Windows::Forms::Label ^ label6;
      System::Windows::Forms::Label ^ label7;
      System::Windows::Forms::Label ^ label8;
      System::Windows::Forms::Label ^ label9;
      System::Windows::Forms::Button^ clearButton;
      System::Drawing::Drawing2D::GraphicsPath^ mousePath;
      System::Windows::Forms::GroupBox^ groupBox1;
      int fontSize;

   public:
      Form1()
      {
         fontSize = 20;
         mousePath = gcnew System::Drawing::Drawing2D::GraphicsPath;
         this->panel1 = gcnew System::Windows::Forms::Panel;
         this->label1 = gcnew System::Windows::Forms::Label;
         this->clearButton = gcnew System::Windows::Forms::Button;
         this->label2 = gcnew System::Windows::Forms::Label;
         this->label3 = gcnew System::Windows::Forms::Label;
         this->label4 = gcnew System::Windows::Forms::Label;
         this->label5 = gcnew System::Windows::Forms::Label;
         this->label6 = gcnew System::Windows::Forms::Label;
         this->label7 = gcnew System::Windows::Forms::Label;
         this->label8 = gcnew System::Windows::Forms::Label;
         this->label9 = gcnew System::Windows::Forms::Label;
         this->groupBox1 = gcnew System::Windows::Forms::GroupBox;
         
         // Mouse Events Label
         this->label1->Location = System::Drawing::Point(
 24, 504 );
         this->label1->Size = System::Drawing::Size( 392,
 23 );
         
         // DoubleClickSize Label
         this->label2->AutoSize = true;
         this->label2->Location = System::Drawing::Point(
 24, 48 );
         this->label2->Size = System::Drawing::Size( 35,
 13 );
         
         // DoubleClickTime Label
         this->label3->AutoSize = true;
         this->label3->Location = System::Drawing::Point(
 24, 72 );
         this->label3->Size = System::Drawing::Size( 35,
 13 );
         
         // MousePresent Label
         this->label4->AutoSize = true;
         this->label4->Location = System::Drawing::Point(
 24, 96 );
         this->label4->Size = System::Drawing::Size( 35,
 13 );
         
         // MouseButtons Label
         this->label5->AutoSize = true;
         this->label5->Location = System::Drawing::Point(
 24, 120 );
         this->label5->Size = System::Drawing::Size( 35,
 13 );
         
         // MouseButtonsSwapped Label
         this->label6->AutoSize = true;
         this->label6->Location = System::Drawing::Point(
 320, 48 );
         this->label6->Size = System::Drawing::Size( 35,
 13 );
         
         // MouseWheelPresent Label
         this->label7->AutoSize = true;
         this->label7->Location = System::Drawing::Point(
 320, 72 );
         this->label7->Size = System::Drawing::Size( 35,
 13 );
         
         // MouseWheelScrollLines Label
         this->label8->AutoSize = true;
         this->label8->Location = System::Drawing::Point(
 320, 96 );
         this->label8->Size = System::Drawing::Size( 35,
 13 );
         
         // NativeMouseWheelSupport Label
         this->label9->AutoSize = true;
         this->label9->Location = System::Drawing::Point(
 320, 120 );
         this->label9->Size = System::Drawing::Size( 35,
 13 );
         
         // Mouse Panel
         this->panel1->Anchor = static_cast<System::Windows::Forms::AnchorStyles>(System::Windows::Forms::AnchorStyles::Top
 | System::Windows::Forms::AnchorStyles::Left | System::Windows::Forms::AnchorStyles::Right);
         this->panel1->BackColor = System::Drawing::SystemColors::ControlDark;
         this->panel1->Location = System::Drawing::Point(
 16, 160 );
         this->panel1->Size = System::Drawing::Size( 664,
 320 );
         this->panel1->MouseUp += gcnew System::Windows::Forms::MouseEventHandler(
 this, &Form1::panel1_MouseUp );
         this->panel1->Paint += gcnew System::Windows::Forms::PaintEventHandler(
 this, &Form1::panel1_Paint );
         this->panel1->MouseEnter += gcnew System::EventHandler(
 this, &Form1::panel1_MouseEnter );
         this->panel1->MouseHover += gcnew System::EventHandler(
 this, &Form1::panel1_MouseHover );
         this->panel1->MouseMove += gcnew System::Windows::Forms::MouseEventHandler(
 this, &Form1::panel1_MouseMove );
         this->panel1->MouseLeave += gcnew System::EventHandler(
 this, &Form1::panel1_MouseLeave );
         this->panel1->MouseDown += gcnew System::Windows::Forms::MouseEventHandler(
 this, &Form1::panel1_MouseDown );
         this->panel1->MouseWheel += gcnew System::Windows::Forms::MouseEventHandler(
 this, &Form1::panel1_MouseWheel );
         
         // Clear Button
         this->clearButton->Anchor = static_cast<System::Windows::Forms::AnchorStyles>(System::Windows::Forms::AnchorStyles::Top
 | System::Windows::Forms::AnchorStyles::Right);
         this->clearButton->Location = System::Drawing::Point(
 592, 504 );
         this->clearButton->TabIndex = 1;
         this->clearButton->Text = "Clear";
         this->clearButton->Click += gcnew System::EventHandler(
 this, &Form1::clearButton_Click );
         
         // GroupBox
         this->groupBox1->Anchor = static_cast<System::Windows::Forms::AnchorStyles>(System::Windows::Forms::AnchorStyles::Top
 | System::Windows::Forms::AnchorStyles::Left | System::Windows::Forms::AnchorStyles::Right);
         this->groupBox1->Location = System::Drawing::Point(
 16, 24 );
         this->groupBox1->Size = System::Drawing::Size(
 664, 128 );
         this->groupBox1->Text = "System::Windows::Forms::SystemInformation";
         
         // Set up how the form should be displayed and add the controls
 to the form.
         this->ClientSize = System::Drawing::Size( 696, 534
 );
         array<System::Windows::Forms::Control^>^temp0 = {this->label9
,this->label8,this->label7,this->label6
,this->label5,this->label4,this->label3,this->label2,this->clearButton
,this->panel1,this->label1,this->groupBox1};
         this->Controls->AddRange( temp0 );
         this->Text = "Mouse Event Example";
         
         // Displays information about the system mouse.
         label2->Text = "SystemInformation::DoubleClickSize: {0}",SystemInformation::DoubleClickSize;
         label3->Text = "SystemInformation::DoubleClickTime: {0}",SystemInformation::DoubleClickTime;
         label4->Text = "SystemInformation::MousePresent: {0}",SystemInformation::MousePresent;
         label5->Text = "SystemInformation::MouseButtons: {0}",SystemInformation::MouseButtons;
         label6->Text = "SystemInformation::MouseButtonsSwapped: {0}"
,SystemInformation::MouseButtonsSwapped;
         label7->Text = "SystemInformation::MouseWheelPresent: {0}"
,SystemInformation::MouseWheelPresent;
         label8->Text = "SystemInformation::MouseWheelScrollLines: {0}"
,SystemInformation::MouseWheelScrollLines;
         label9->Text = "SystemInformation::NativeMouseWheelSupport: {0}"
,SystemInformation::NativeMouseWheelSupport;
      }

   private:
      void panel1_MouseDown( Object^ /*sender*/, System::Windows::Forms::MouseEventArgs^
 e )
      {
         // Update the mouse path with the mouse information
         Point mouseDownLocation = Point(e->X,e->Y);
         String^ eventString = nullptr;
         switch ( e->Button )
         {
            case ::MouseButtons::Left:
               eventString = "L";
               break;

            case ::MouseButtons::Right:
               eventString = "R";
               break;

            case ::MouseButtons::Middle:
               eventString = "M";
               break;

            case ::MouseButtons::XButton1:
               eventString = "X1";
               break;

            case ::MouseButtons::XButton2:
               eventString = "X2";
               break;

            case ::MouseButtons::None:
            default:
               break;
         }
         if ( eventString != nullptr )
         {
            mousePath->AddString( eventString, FontFamily::GenericSerif, (int)FontStyle::Bold,
 (float)fontSize, mouseDownLocation, StringFormat::GenericDefault
 );
         }
         else
         {
            mousePath->AddLine( mouseDownLocation, mouseDownLocation );
         }

         panel1->Focus();
         panel1->Invalidate();
      }

      void panel1_MouseEnter( Object^ sender, System::EventArgs^
 /*e*/ )
      {
         
         // Update the mouse event label to indicate the MouseEnter
 event occurred.
         label1->Text = String::Concat( sender->GetType(), ": MouseEnter"
 );
      }

      void panel1_MouseHover( Object^ sender, System::EventArgs^
 /*e*/ )
      {
         
         // Update the mouse event label to indicate the MouseHover
 event occurred.
         label1->Text = String::Concat( sender->GetType(), ": MouseHover"
 );
      }

      void panel1_MouseLeave( Object^ sender, System::EventArgs^
 /*e*/ )
      {
         
         // Update the mouse event label to indicate the MouseLeave
 event occurred.
         label1->Text = String::Concat( sender->GetType(), ": MouseLeave"
 );
      }

      void panel1_MouseMove( Object^ /*sender*/, System::Windows::Forms::MouseEventArgs^
 e )
      {
         // Update the mouse path that is drawn onto the Panel.
         int mouseX = e->X;
         int mouseY = e->Y;
         mousePath->AddLine( mouseX, mouseY, mouseX, mouseY );
      }

      void panel1_MouseWheel( Object^ /*sender*/, System::Windows::Forms::MouseEventArgs^
 e )
      {
         // Update the drawing based upon the mouse wheel scrolling.
         int numberOfTextLinesToMove = e->Delta * SystemInformation::MouseWheelScrollLines
 / 120;
         int numberOfPixelsToMove = numberOfTextLinesToMove *
 fontSize;
         if ( numberOfPixelsToMove != 0 )
         {
            System::Drawing::Drawing2D::Matrix^ translateMatrix = gcnew System::Drawing::Drawing2D::Matrix;
            translateMatrix->Translate( 0, (float)numberOfPixelsToMove
 );
            mousePath->Transform(translateMatrix);
         }

         panel1->Invalidate();
      }

      void panel1_MouseUp( Object^ /*sender*/, System::Windows::Forms::MouseEventArgs^
 e )
      {
         Point mouseUpLocation = System::Drawing::Point( e->X, e->Y );
         
         // Show the number of clicks in the path graphic.
         int numberOfClicks = e->Clicks;
         mousePath->AddString( String::Format( "   {0}", numberOfClicks
 ), FontFamily::GenericSerif, (int)FontStyle::Bold, (float)fontSize,
 mouseUpLocation, StringFormat::GenericDefault );
         panel1->Invalidate();
      }

      void panel1_Paint( Object^ /*sender*/, System::Windows::Forms::PaintEventArgs^
 e )
      {
         // Perform the painting of the Panel.
         e->Graphics->DrawPath( System::Drawing::Pens::DarkRed, mousePath );
      }

      void clearButton_Click( Object^ /*sender*/, System::EventArgs^
 /*e*/ )
      {
         // Clear the Panel display.
         delete mousePath;
         mousePath = gcnew System::Drawing::Drawing2D::GraphicsPath;
         panel1->Invalidate();
      }
   };
}

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

J#

package MouseEvent;
import System.*;
import System.Drawing.*;
import System.Windows.Forms.*;

public class Form1 extends System.Windows.Forms.Form
{
    private System.Windows.Forms.Panel panel1;
    private System.Windows.Forms.Label label1;
    private System.Windows.Forms.Label label2;
    private System.Windows.Forms.Label label3;
    private System.Windows.Forms.Label label4;
    private System.Windows.Forms.Label label5;
    private System.Windows.Forms.Label label6;
    private System.Windows.Forms.Label label7;
    private System.Windows.Forms.Label label8;
    private System.Windows.Forms.Label label9;
    private System.Windows.Forms.Button clearButton;
    private System.Drawing.Drawing2D.GraphicsPath mousePath;
    private System.Windows.Forms.GroupBox groupBox1;
    private int fontSize = 20;

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

    public Form1()
    {
        mousePath = new System.Drawing.Drawing2D.GraphicsPath();

        this.panel1 = new System.Windows.Forms.Panel();
        this.label1 = new System.Windows.Forms.Label();
        this.clearButton = new System.Windows.Forms.Button();
        this.label2 = new System.Windows.Forms.Label();
        this.label3 = new System.Windows.Forms.Label();
        this.label4 = new System.Windows.Forms.Label();
        this.label5 = new System.Windows.Forms.Label();
        this.label6 = new System.Windows.Forms.Label();
        this.label7 = new System.Windows.Forms.Label();
        this.label8 = new System.Windows.Forms.Label();
        this.label9 = new System.Windows.Forms.Label();
        this.groupBox1 = new System.Windows.Forms.GroupBox();
        // Mouse Events Label
        this.label1.set_Location(new System.Drawing.Point(24,
 504));
        this.label1.set_Size(new System.Drawing.Size(392,
 23));
        // DoubleClickSize Label
        this.label2.set_AutoSize(true);
        this.label2.set_Location(new System.Drawing.Point(24,
 48));
        this.label2.set_Size(new System.Drawing.Size(35,
 13));
        // DoubleClickTime Label
        this.label3.set_AutoSize(true);
        this.label3.set_Location(new System.Drawing.Point(24,
 72));
        this.label3.set_Size(new System.Drawing.Size(35,
 13));
        // MousePresent Label
        this.label4.set_AutoSize(true);
        this.label4.set_Location(new System.Drawing.Point(24,
 96));
        this.label4.set_Size(new System.Drawing.Size(35,
 13));
        // MouseButtons Label
        this.label5.set_AutoSize(true);
        this.label5.set_Location(new System.Drawing.Point(24,
 120));
        this.label5.set_Size(new System.Drawing.Size(35,
 13));
        // MouseButtonsSwapped Label
        this.label6.set_AutoSize(true);
        this.label6.set_Location(new System.Drawing.Point(320,
 48));
        this.label6.set_Size(new System.Drawing.Size(35,
 13));
        // MouseWheelPresent Label
        this.label7.set_AutoSize(true);
        this.label7.set_Location(new System.Drawing.Point(320,
 72));
        this.label7.set_Size(new System.Drawing.Size(35,
 13));
        // MouseWheelScrollLines Label
        this.label8.set_AutoSize(true);
        this.label8.set_Location(new System.Drawing.Point(320,
 96));
        this.label8.set_Size(new System.Drawing.Size(35,
 13));
        // NativeMouseWheelSupport Label
        this.label9.set_AutoSize(true);
        this.label9.set_Location(new System.Drawing.Point(320,
 120));
        this.label9.set_Size(new System.Drawing.Size(35,
 13));
        // Mouse Panel
        this.panel1.set_Anchor(System.Windows.Forms.AnchorStyles.Top
            | System.Windows.Forms.AnchorStyles.Left
            | System.Windows.Forms.AnchorStyles.Right);
        this.panel1.set_BackColor(System.Drawing.SystemColors.get_ControlDark());
        this.panel1.set_Location(new System.Drawing.Point(16,
 160));
        this.panel1.set_Size(new System.Drawing.Size(664,
 320));
        this.panel1.add_MouseUp(
            new System.Windows.Forms.MouseEventHandler(this.panel1_MouseUp));
        this.panel1.add_Paint(new System.Windows.Forms.PaintEventHandler(
            this.panel1_Paint));
        this.panel1.add_MouseEnter(new System.EventHandler(
            this.panel1_MouseEnter));
        this.panel1.add_MouseHover(new System.EventHandler(
            this.panel1_MouseHover));
        this.panel1.add_MouseMove(
            new System.Windows.Forms.MouseEventHandler(this.panel1_MouseMove));
        this.panel1.add_MouseLeave(
            new System.EventHandler(this.panel1_MouseLeave));
        this.panel1.add_MouseDown(
            new System.Windows.Forms.MouseEventHandler(this.panel1_MouseDown));
        this.panel1.add_MouseWheel(
            new System.Windows.Forms.MouseEventHandler(this.panel1_MouseWheel));
        // Clear Button
        this.clearButton.set_Anchor(System.Windows.Forms.AnchorStyles.Top
            | System.Windows.Forms.AnchorStyles.Right);
        this.clearButton.set_Location(new System.Drawing.Point(592,
 504));
        this.clearButton.set_TabIndex(1);
        this.clearButton.set_Text("Clear");
        this.clearButton.add_Click(new System.EventHandler(
            this.clearButton_Click));
        // GroupBox
        this.groupBox1.set_Anchor(System.Windows.Forms.AnchorStyles.Top
            | System.Windows.Forms.AnchorStyles.Left
            | System.Windows.Forms.AnchorStyles.Right);
        this.groupBox1.set_Location(new System.Drawing.Point(16,
 24));
        this.groupBox1.set_Size(new System.Drawing.Size(664,
 128));
        this.groupBox1.set_Text("System.Windows.Forms.SystemInformation");
        // Set up how the form should be displayed and add the controls
        // to the form.
        this.set_ClientSize(new System.Drawing.Size(696,
 534));
        this.get_Controls().AddRange(new System.Windows.Forms.Control[]
 {
            this.label9, this.label8, this.label7,
 this.label6, this.label5,
            this.label4, this.label3, this.label2,
 this.clearButton,
            this.panel1, this.label1, this.groupBox1
 });
        this.set_Text("Mouse Event Example");
        // Displays information about the system mouse.
        label2.set_Text("SystemInformation.DoubleClickSize: "
            + SystemInformation.get_DoubleClickSize().ToString());
        label3.set_Text("SystemInformation.DoubleClickTime: "
            + ((Int32)SystemInformation.get_DoubleClickTime()).ToString());
        label4.set_Text("SystemInformation.MousePresent: "
            + ((System.Boolean)SystemInformation.get_MousePresent()).ToString());
        label5.set_Text("SystemInformation.MouseButtons: "
            + ((Int32)SystemInformation.get_MouseButtons()).ToString());
        label6.set_Text("SystemInformation.MouseButtonsSwapped: "
            + ((System.Boolean)SystemInformation.get_MouseButtonsSwapped()).
            ToString());
        label7.set_Text("SystemInformation.MouseWheelPresent: "
            + ((System.Boolean)SystemInformation.get_MouseWheelPresent()).
            ToString());
        label8.set_Text("SystemInformation.MouseWheelScrollLines: "
            + ((Int32)SystemInformation.get_MouseWheelScrollLines()).
            ToString());
        label9.set_Text("SystemInformation.NativeMouseWheelSupport: "
            + ((System.Boolean)SystemInformation.
            get_NativeMouseWheelSupport()).ToString());
    } //Form1

    private void panel1_MouseDown(Object sender
,
        System.Windows.Forms.MouseEventArgs e)
    {
        // Update the mouse path with the mouse information
        Point mouseDownLocation = new Point(e.get_X(), e.get_Y());

        String eventString = null;
        switch (e.get_Button()) {
            case MouseButtons.Left:
                eventString = "L";
                break;
            case MouseButtons.Right:
                eventString = "R";
                break;
            case MouseButtons.Middle:
                eventString = "M";
                break;
            case MouseButtons.XButton1:
                eventString = "X1";
                break;
            case MouseButtons.XButton2:
                eventString = "X2";
                break;
            case MouseButtons.None:
            default:
                break;
        }

        if (eventString != null) {
            mousePath.AddString(eventString, FontFamily.get_GenericSerif(),
                (int)FontStyle.Bold, fontSize, mouseDownLocation
,
                StringFormat.get_GenericDefault());
        }
        else {
            mousePath.AddLine(mouseDownLocation, mouseDownLocation);
        }
        panel1.Focus();
        panel1.Invalidate();
    } //panel1_MouseDown

    private void panel1_MouseEnter(Object sender,
 System.EventArgs e)
    {
        // Update the mouse event label to indicate the MouseEnter event
 occurred.
        label1.set_Text(sender.GetType().ToString() + ": MouseEnter");
    } //panel1_MouseEnter

    private void panel1_MouseHover(Object sender,
 System.EventArgs e)
    {
        // Update the mouse event label to indicate the MouseHover event
 occurred.
        label1.set_Text(sender.GetType().ToString() + ": MouseHover");
    } //panel1_MouseHover

    private void panel1_MouseLeave(Object sender,
 System.EventArgs e)
    {
        // Update the mouse event label to indicate the MouseLeave event
 occurred.
        label1.set_Text(sender.GetType().ToString() + ": MouseLeave");
    } //panel1_MouseLeave

    private void panel1_MouseMove(Object sender
,
        System.Windows.Forms.MouseEventArgs e)
    {
        // Update the mouse path that is drawn onto the Panel.
        int mouseX = e.get_X();
        int mouseY = e.get_Y();

        mousePath.AddLine(mouseX, mouseY, mouseX, mouseY);
    } //panel1_MouseMove

    private void panel1_MouseWheel(Object sender
,
        System.Windows.Forms.MouseEventArgs e)
    {
        // Update the drawing based upon the mouse wheel scrolling.
        int numberOfTextLinesToMove =
            e.get_Delta() * SystemInformation.get_MouseWheelScrollLines() / 120;
        int numberOfPixelsToMove = numberOfTextLinesToMove * fontSize;

        if (numberOfPixelsToMove != 0) {
            System.Drawing.Drawing2D.Matrix translateMatrix =
                new System.Drawing.Drawing2D.Matrix();
            translateMatrix.Translate(0, numberOfPixelsToMove);
            mousePath.Transform(translateMatrix);
        }
        panel1.Invalidate();
    } //panel1_MouseWheel

    private void panel1_MouseUp(Object sender
,
        System.Windows.Forms.MouseEventArgs e)
    {
        Point mouseUpLocation = new System.Drawing.Point(e.get_X(),
 e.get_Y());
        // Show the number of clicks in the path graphic.
        int numberOfClicks = e.get_Clicks();
        mousePath.AddString("    " + ((Int32)numberOfClicks).ToString()
,
            FontFamily.get_GenericSerif(), (int)(FontStyle.Bold),
 fontSize,
            mouseUpLocation, StringFormat.get_GenericDefault());

        panel1.Invalidate();
    } //panel1_MouseUp

    private void panel1_Paint(Object sender
,
        System.Windows.Forms.PaintEventArgs e)
    {
        // Perform the painting of the Panel.
        e.get_Graphics().DrawPath(System.Drawing.Pens.get_DarkRed(), mousePath);
    } //panel1_Paint

    private void clearButton_Click(Object sender,
 System.EventArgs e)
    {
        // Clear the Panel display.
        mousePath.Dispose();
        mousePath = new System.Drawing.Drawing2D.GraphicsPath();
        panel1.Invalidate();
    } //clearButton_Click
} //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
OnMouseHover
MouseHoverTime
MouseEventArgs
その他の技術情報
Windows フォームの座標
Windows フォームにおけるマウス イベント