Cursors Class
Assembly: System.Windows.Forms (in system.windows.forms.dll)
Some of the Cursor objects in this class can take on a different appearance than those described. The user can change the cursor appearance by adjusting the mouse pointer settings in their operating system. The panning and no move cursors are static and cannot be changed by the operating system.
The panning and no move cursors are used during mouse wheel operations. Depending on the direction the window can be scrolled, the cursor changes to the appropriate no move cursor when the mouse wheel is clicked. The cursor then changes to the appropriate panning cursor as the mouse is moved.
The following example demonstrates changing the mouse cursor using the Control.Cursor property, the Cursor class, and the Cursors class. The example creates a form that contains a ComboBox control, a Panel control, and a ListView control. The ComboBox contains all cursors provided by the Cursors class. When the user selects a mouse cursor in the ComboBox, the Control.Cursor property is set to the selected cursor, which updates the cursor for the Panel. The ListView is updated every time the Control.CursorChanged event occurs.
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); } } }
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
The following example draws the specified cursor on the form in its normal size, and in stretched mode, twice its size. This example assumes that you have a Form and a Cursor object to pass into the method when it is called.
private void DrawCursorsOnForm(Cursor cursor) { // If the form's cursor is not the Hand cursor and the // Current cursor is the Default, Draw the specified // cursor on the form in normal size and twice normal size. if(this.Cursor != Cursors.Hand & Cursor.Current == Cursors.Default) { // Draw the cursor stretched. Graphics graphics = this.CreateGraphics(); Rectangle rectangle = new Rectangle( new Point(10,10), new Size(cursor.Size.Width * 2, cursor.Size.Height * 2)); cursor.DrawStretched(graphics, rectangle); // Draw the cursor in normal size. rectangle.Location = new Point( rectangle.Width + rectangle.Location.X, rectangle.Height + rectangle.Location.Y); rectangle.Size = cursor.Size; cursor.Draw(graphics, rectangle); // Dispose of the cursor. cursor.Dispose(); } }
private void DrawCursorsOnForm(Cursor cursor)
{
// If the form's cursor is not the Hand cursor and the
// Current cursor is the Default, Draw the specified
// cursor on the form in normal size and twice normal size.
if (!(this.get_Cursor().Equals(Cursors.get_Hand()))
& get_Cursor().get_Current().Equals(Cursors.get_Default())) {
// Draw the cursor stretched.
Graphics graphics = this.CreateGraphics();
Rectangle rectangle = new Rectangle(new Point(10, 10),
new Size(cursor.get_Size().get_Width() * 2,
cursor.get_Size().get_Height() * 2));
cursor.DrawStretched(graphics, rectangle);
// Draw the cursor in normal size.
rectangle.set_Location(new Point(rectangle.get_Width()
+ rectangle.get_Location().get_X(), rectangle.get_Height()
+ rectangle.get_Location().get_Y()));
rectangle.set_Size(cursor.get_Size());
cursor.Draw(graphics, rectangle);
// Dispose of the cursor.
cursor.Dispose();
}
} //DrawCursorsOnForm
Windows 98, Windows Server 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
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.