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java.lang.Objectorg.eclipse.swt.graphics.Resource
org.eclipse.swt.graphics.Color
public final class Color
Instances of this class manage the operating system resources that
implement SWT's RGB color model. To create a color you can either
specify the individual color components as integers in the range
0 to 255 or provide an instance of an RGB
.
Application code must explicitly invoke the Color.dispose()
method to release the operating system resources managed by each instance
when those instances are no longer required.
RGB
,
Device.getSystemColor(int)
,
Color and RGB snippets,
SWT Example: PaintExample,
Sample code and further informationField Summary | |
---|---|
GdkColor |
handle
the handle to the OS color resource (Warning: This field is platform dependent) |
Constructor Summary | |
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Color(Device device,
int red,
int green,
int blue)
Constructs a new instance of this class given a device and the desired red, green and blue values expressed as ints in the range 0 to 255 (where 0 is black and 255 is full brightness). |
|
Color(Device device,
RGB rgb)
Constructs a new instance of this class given a device and an RGB describing the desired red, green and blue values. |
Method Summary | |
---|---|
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. |
int |
getBlue()
Returns the amount of blue in the color, from 0 to 255. |
int |
getGreen()
Returns the amount of green in the color, from 0 to 255. |
int |
getRed()
Returns the amount of red in the color, from 0 to 255. |
RGB |
getRGB()
Returns an RGB representing the receiver. |
static Color |
gtk_new(Device device,
GdkColor gdkColor)
Invokes platform specific functionality to allocate a new color. |
int |
hashCode()
Returns an integer hash code for the receiver. |
boolean |
isDisposed()
Returns true if the color 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 org.eclipse.swt.graphics.Resource |
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dispose, getDevice |
Methods inherited from class java.lang.Object |
---|
clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Field Detail |
---|
public GdkColor handle
IMPORTANT: This field is not part of the SWT public API. 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 accessed from application code.
Constructor Detail |
---|
public Color(Device device, int red, int green, int blue)
You must dispose the color when it is no longer required.
device
- the device on which to allocate the colorred
- the amount of red in the colorgreen
- the amount of green in the colorblue
- the amount of blue in the color
java.lang.IllegalArgumentException
- Resource.dispose()
public Color(Device device, RGB rgb)
RGB
describing the desired red, green and blue values.
On limited color devices, the color instance created by this call
may not have the same RGB values as the ones specified by the
argument. The RGB values on the returned instance will be the color
values of the operating system color.
You must dispose the color when it is no longer required.
device
- the device on which to allocate the colorrgb
- the RGB values of the desired color
java.lang.IllegalArgumentException
- Resource.dispose()
Method Detail |
---|
public boolean equals(java.lang.Object object)
equals
in class java.lang.Object
object
- the object to compare with this object
true
if the object is the same as this object and false
otherwisehashCode()
public int getBlue()
SWTException
- public int getGreen()
SWTException
- public int getRed()
SWTException
- public int hashCode()
true
when passed to
equals
must return the same value for this
method.
hashCode
in class java.lang.Object
equals(java.lang.Object)
public RGB getRGB()
RGB
representing the receiver.
SWTException
- public static Color gtk_new(Device device, GdkColor gdkColor)
IMPORTANT: This method is not part of the public
API for Color
. 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.
device
- the device on which to allocate the colorhandle
- the handle for the colorpublic boolean isDisposed()
true
if the color has been disposed,
and false
otherwise.
This method gets the dispose state for the color. When a color has been disposed, it is an error to invoke any other method using the color.
isDisposed
in class Resource
true
when the color is disposed and false
otherwisepublic java.lang.String toString()
toString
in class java.lang.Object
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