Package org.eclipse.swt.graphics
Class Color
java.lang.Object
org.eclipse.swt.graphics.Resource
org.eclipse.swt.graphics.Color
Instances of this class manage resources that implement SWT's RGB color
 model.
- Since:
- 1.0
- See Also:
- 
Constructor SummaryConstructorsConstructorDescriptionConstructs 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).Constructs a new instance of this class given a device and the desired red, green, blue & alpha values expressed as ints in the range 0 to 255 (where 0 is black and 255 is full brightness).Constructs a new instance of this class given a device and anRGBdescribing the desired red, green and blue values.Constructs a new instance of this class given a device and anRGBAdescribing the desired red, green, blue & alpha values.Constructs a new instance of this class given a device, anRGBdescribing the desired red, green and blue values, alpha specifying the level of transparency.
- 
Method SummaryModifier and TypeMethodDescriptionbooleanCompares the argument to the receiver, and returns true if they represent the same object using a class specific comparison.intgetAlpha()Returns the amount of alpha in the color, from 0 (transparent) to 255 (opaque).intgetBlue()Returns the amount of blue in the color, from 0 to 255.intgetGreen()Returns the amount of green in the color, from 0 to 255.intgetRed()Returns the amount of red in the color, from 0 to 255.getRGB()Returns anRGBrepresenting the receiver.getRGBA()Returns anRGBArepresenting the receiver.inthashCode()Returns an integer hash code for the receiver.toString()Returns a string containing a concise, human-readable description of the receiver.Methods inherited from class org.eclipse.swt.graphics.Resourcedispose, getDevice, isDisposed
- 
Constructor Details- 
ColorConstructs a new instance of this class given a device and anRGBdescribing 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. - Parameters:
- device- the device on which to allocate the color
- rgb- the RGB values of the desired color
- Throws:
- IllegalArgumentException-- ERROR_NULL_ARGUMENT - if device is null and there is no current device
- ERROR_NULL_ARGUMENT - if the rgb argument is null
- ERROR_INVALID_ARGUMENT - if the red, green or blue components of the argument are not between 0 and 255
 
- Since:
- 1.3
- See Also:
 
- 
ColorConstructs a new instance of this class given a device, anRGBdescribing the desired red, green and blue values, alpha specifying the level of transparency. 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. - Parameters:
- device- the device on which to allocate the color
- rgb- the RGB values of the desired color
- alpha- the alpha value of the desired color. Currently, SWT only honors extreme values for alpha i.e. 0 (transparent) or 255 (opaque).
- Throws:
- IllegalArgumentException-- ERROR_NULL_ARGUMENT - if device is null and there is no current device
- ERROR_NULL_ARGUMENT - if the rgb argument is null
- ERROR_INVALID_ARGUMENT - if the red, green, blue or alpha components of the argument are not between 0 and 255
 
- Since:
- 3.1
- See Also:
 
- 
ColorConstructs a new instance of this class given a device and anRGBAdescribing the desired red, green, blue & alpha values. On limited color devices, the color instance created by this call may not have the same RGBA values as the ones specified by the argument. The RGBA values on the returned instance will be the color values of the operating system color + alpha.You must dispose the color when it is no longer required. - Parameters:
- device- the device on which to allocate the color
- rgba- the RGBA values of the desired color. Currently, SWT only honors extreme values for alpha i.e. 0 (transparent) or 255 (opaque).
- Throws:
- IllegalArgumentException-- ERROR_NULL_ARGUMENT - if device is null and there is no current device
- ERROR_NULL_ARGUMENT - if the rgba argument is null
- ERROR_INVALID_ARGUMENT - if the red, green, blue or alpha components of the argument are not between 0 and 255
 
- Since:
- 3.1
- See Also:
 
- 
ColorConstructs 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). On limited color devices, the color instance created by this call may not have the same RGB values as the ones specified by the arguments. 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. - Parameters:
- device- the device on which to allocate the color
- red- the amount of red in the color
- green- the amount of green in the color
- blue- the amount of blue in the color
- Throws:
- IllegalArgumentException-- ERROR_NULL_ARGUMENT - if device is null and there is no current device
- ERROR_INVALID_ARGUMENT - if the red, green or blue argument is not between 0 and 255
 
- Since:
- 1.3
- See Also:
 
- 
ColorConstructs a new instance of this class given a device and the desired red, green, blue & alpha values expressed as ints in the range 0 to 255 (where 0 is black and 255 is full brightness). On limited color devices, the color instance created by this call may not have the same RGB values as the ones specified by the arguments. 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. - Parameters:
- device- the device on which to allocate the color
- red- the amount of red in the color
- green- the amount of green in the color
- blue- the amount of blue in the color
- alpha- the amount of alpha in the color. Currently, SWT only honors extreme values for alpha i.e. 0 (transparent) or 255 (opaque).
- Throws:
- IllegalArgumentException-- ERROR_NULL_ARGUMENT - if device is null and there is no current device
- ERROR_INVALID_ARGUMENT - if the red, green, blue or alpha argument is not between 0 and 255
 
- Since:
- 3.1
- See Also:
 
 
- 
- 
Method Details- 
getBluepublic int getBlue()Returns the amount of blue in the color, from 0 to 255.- Returns:
- the blue component of the color
- Throws:
- SWTException-- ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed
 
 
- 
getGreenpublic int getGreen()Returns the amount of green in the color, from 0 to 255.- Returns:
- the green component of the color
- Throws:
- SWTException-- ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed
 
 
- 
getRedpublic int getRed()Returns the amount of red in the color, from 0 to 255.- Returns:
- the red component of the color
- Throws:
- SWTException-- ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed
 
 
- 
getAlphapublic int getAlpha()Returns the amount of alpha in the color, from 0 (transparent) to 255 (opaque).- Returns:
- the alpha component of the color
- Throws:
- SWTException-- ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed
 
- Since:
- 3.1
 
- 
getRGBReturns anRGBrepresenting the receiver.- Returns:
- the RGB for the color
- Throws:
- SWTException-- ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed
 
 
- 
getRGBAReturns anRGBArepresenting the receiver.- Returns:
- the RGBA for the color
- Throws:
- SWTException-- ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed
 
- Since:
- 3.1
 
- 
equalsCompares the argument to the receiver, and returns true if they represent the same object using a class specific comparison.
- 
hashCodepublic int hashCode()Returns an integer hash code for the receiver. Any two objects that returntruewhen passed toequalsmust return the same value for this method.
- 
toStringReturns a string containing a concise, human-readable description of the receiver.
 
-