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org.eclipse.swt.graphics
Class Cursor
java.lang.Objectorg.eclipse.swt.graphics.Cursor
- public final class Cursor
- extends java.lang.Object
Instances of this class manage operating system resources that specify the appearance of the on-screen pointer. To create a cursor you specify the device and either a simple cursor style describing one of the standard operating system provided cursors or the image and mask data for the desired appearance.
Application code must explicitly invoke the Cursor.dispose()
method to release the operating system resources managed by each instance
when those instances are no longer required.
- Styles:
- CURSOR_ARROW, CURSOR_WAIT, CURSOR_CROSS, CURSOR_APPSTARTING, CURSOR_HELP, CURSOR_SIZEALL, CURSOR_SIZENESW, CURSOR_SIZENS, CURSOR_SIZENWSE, CURSOR_SIZEWE, CURSOR_SIZEN, CURSOR_SIZES, CURSOR_SIZEE, CURSOR_SIZEW, CURSOR_SIZENE, CURSOR_SIZESE, CURSOR_SIZESW, CURSOR_SIZENW, CURSOR_UPARROW, CURSOR_IBEAM, CURSOR_NO, CURSOR_HAND
Note: Only one of the above styles may be specified.
| Field Summary | |
(package private) Device |
device
The device where this cursor was created. |
long |
handle
the handle to the OS cursor resource (Warning: This field is platform dependent) |
| Constructor Summary | |
(package private) |
Cursor()
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Cursor(Device device,
ImageData source,
ImageData mask,
int hotspotX,
int hotspotY)
Constructs a new cursor given a device, image and mask data describing the desired cursor appearance, and the x and y coordinates of the hotspot (that is, the point within the area covered by the cursor which is considered to be where the on-screen pointer is "pointing"). |
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Cursor(Device device,
ImageData source,
int hotspotX,
int hotspotY)
Constructs a new cursor given a device, image data describing the desired cursor appearance, and the x and y coordinates of the hotspot (that is, the point within the area covered by the cursor which is considered to be where the on-screen pointer is "pointing"). |
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Cursor(Device device,
int style)
Constructs a new cursor given a device and a style constant describing the desired cursor appearance. |
| Method Summary | |
void |
dispose()
Disposes of the operating system resources associated with the cursor. |
boolean |
equals(java.lang.Object object)
Compares the argument to the receiver, and returns true if they represent the same object using a class specific comparison. |
static Cursor |
gtk_new(Device device,
long handle)
Invokes platform specific functionality to allocate a new cursor. |
int |
hashCode()
Returns an integer hash code for the receiver. |
boolean |
isDisposed()
Returns true if the cursor has been disposed,
and false otherwise. |
java.lang.String |
toString()
Returns a string containing a concise, human-readable description of the receiver. |
| Methods inherited from class java.lang.Object |
clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
| Field Detail |
handle
public long handle
- the handle to the OS cursor resource
(Warning: This field is platform dependent)
device
Device device
- The device where this cursor was created.
| Constructor Detail |
Cursor
Cursor()
Cursor
public Cursor(Device device, int style)
- Constructs a new cursor given a device and a style
constant describing the desired cursor appearance.
You must dispose the cursor when it is no longer required.
Cursor
public Cursor(Device device, ImageData source, ImageData mask, int hotspotX, int hotspotY)
- Constructs a new cursor given a device, image and mask
data describing the desired cursor appearance, and the x
and y coordinates of the hotspot (that is, the point
within the area covered by the cursor which is considered
to be where the on-screen pointer is "pointing").
The mask data is allowed to be null, but in this case the source must be an ImageData representing an icon that specifies both color data and mask data.
You must dispose the cursor when it is no longer required.
Cursor
public Cursor(Device device, ImageData source, int hotspotX, int hotspotY)
- Constructs a new cursor given a device, image data describing
the desired cursor appearance, and the x and y coordinates of
the hotspot (that is, the point within the area
covered by the cursor which is considered to be where the
on-screen pointer is "pointing").
You must dispose the cursor when it is no longer required.
- Since:
- 3.0
| Method Detail |
dispose
public void dispose()
- Disposes of the operating system resources associated with
the cursor. Applications must dispose of all cursors which
they allocate.
equals
public boolean equals(java.lang.Object object)
- Compares the argument to the receiver, and returns true
if they represent the same object using a class
specific comparison.
gtk_new
public static Cursor gtk_new(Device device, long handle)
- Invokes platform specific functionality to allocate a new cursor.
IMPORTANT: This method is not part of the public API for
Cursor. It is marked public only so that it can be shared within the packages provided by SWT. It is not available on all platforms, and should never be called from application code.
hashCode
public int hashCode()
- Returns an integer hash code for the receiver. Any two
objects which return
truewhen passed toequalsmust return the same value for this method.
isDisposed
public boolean isDisposed()
- Returns
trueif the cursor has been disposed, andfalseotherwise.This method gets the dispose state for the cursor. When a cursor has been disposed, it is an error to invoke any other method using the cursor.
toString
public java.lang.String toString()
- Returns a string containing a concise, human-readable
description of the receiver.
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