Package org.eclipse.nebula.widgets.opal.commons

Class SWTGraphicUtil

java.lang.Object

org.eclipse.nebula.widgets.opal.commons.SWTGraphicUtil

public class SWTGraphicUtil
extends java.lang.Object

This class is a singleton that provides useful methods

Method Summary

Modifier and Type	Method	Description
static void	addDisposer(org.eclipse.swt.widgets.Widget widget, org.eclipse.swt.graphics.Resource resource)	Dispose safely any SWT resource when a widget is disposed
static void	applyHTMLFormating(org.eclipse.swt.custom.StyledText styledText)	Apply a very basic pseudo-HTML formating to a text stored in a StyledText widget.
static org.eclipse.swt.graphics.ImageData	blur(org.eclipse.swt.graphics.ImageData originalImageData, int radius)
static org.eclipse.swt.graphics.Font	buildFontFrom(org.eclipse.swt.widgets.Control control, int style)	Build a font from a given control.
static org.eclipse.swt.graphics.Font	buildFontFrom(org.eclipse.swt.widgets.Control control, int style, int size)	Build a font from a given control.
static void	centerShell(org.eclipse.swt.widgets.Shell shell)	Center a shell on the primary monitor
static int	computeWidth(java.lang.String text)
static org.eclipse.swt.graphics.Image	createImageFromFile(java.lang.String fileName)	Loads an image and create a SWT Image corresponding to this file
static org.eclipse.swt.graphics.Image	createReflectedImage(org.eclipse.swt.graphics.Image source)	Create a reflected image of a source Inspired by Daniel Spiewak work (http://www.eclipsezone.com/eclipse/forums/t91013.html)
static org.eclipse.swt.graphics.Image	createReflectedResizedImage(org.eclipse.swt.graphics.Image source, int newWidth, int newHeight)	Create a reflected and resized version of an image
static void	disableAllChildrenWidgets(org.eclipse.swt.widgets.Control control)	Disable all widgets of a control
static void	enableAllChildrenWidgets(org.eclipse.swt.widgets.Control control)	Enable all widgets of a control
static org.eclipse.swt.graphics.Rectangle	getBoundsOfMonitorOnWhichShellIsDisplayed(org.eclipse.swt.widgets.Shell shell)
static org.eclipse.swt.graphics.Color	getColorSafely(int r, int g, int b)	Create a color that is disposed automatically
static org.eclipse.swt.graphics.Color	getDefaultColor(org.eclipse.swt.widgets.Control control, int red, int green, int blue)
static boolean	isMacOS()
static org.eclipse.swt.graphics.Image	resize(org.eclipse.swt.graphics.Image source, int newWidth, int newHeight)	Returns a new scaled image.
static void	safeDispose(org.eclipse.swt.graphics.Resource resource)	Dispose safely any SWT resource

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

addDisposer

public static void addDisposer(org.eclipse.swt.widgets.Widget widget,
                               org.eclipse.swt.graphics.Resource resource)

Dispose safely any SWT resource when a widget is disposed

Parameters:

widget - widget attached to the resource

resource - the resource to dispose

safeDispose

public static void safeDispose(org.eclipse.swt.graphics.Resource resource)

Dispose safely any SWT resource

Parameters:

resource - the resource to dispose

getColorSafely

public static org.eclipse.swt.graphics.Color getColorSafely(int r,
                                                            int g,
                                                            int b)

Create a color that is disposed automatically

Parameters:

r - red component

g - green component

b - blue component

Returns:

the color

createImageFromFile

public static org.eclipse.swt.graphics.Image createImageFromFile(java.lang.String fileName)

Loads an image and create a SWT Image corresponding to this file

Parameters:

fileName - file name of the image

Returns:

an image

See Also:

Image

createReflectedImage

public static org.eclipse.swt.graphics.Image createReflectedImage(org.eclipse.swt.graphics.Image source)

Create a reflected image of a source Inspired by Daniel Spiewak work (http://www.eclipsezone.com/eclipse/forums/t91013.html)

Parameters:

source - source to be reflected

Returns:

the source image with a reflection

resize

public static org.eclipse.swt.graphics.Image resize(org.eclipse.swt.graphics.Image source,
                                                    int newWidth,
                                                    int newHeight)

Returns a new scaled image.

Parameters:

source - the image to be scaled

newWidth - new width of the image

newHeight - new height of the image

Returns:

a scaled image of the source

createReflectedResizedImage

public static org.eclipse.swt.graphics.Image createReflectedResizedImage(org.eclipse.swt.graphics.Image source,
                                                                         int newWidth,
                                                                         int newHeight)

Create a reflected and resized version of an image

Parameters:

source - source image to be scaled and reflected

newWidth - new width of the scaled image

newHeight - new height of the scaled image

Returns:

the resized and reflected image

centerShell

public static void centerShell(org.eclipse.swt.widgets.Shell shell)

Center a shell on the primary monitor

Parameters:

shell - shell to center

getBoundsOfMonitorOnWhichShellIsDisplayed

public static org.eclipse.swt.graphics.Rectangle getBoundsOfMonitorOnWhichShellIsDisplayed(org.eclipse.swt.widgets.Shell shell)

Parameters:

shell -

Returns:

the bounds of the monitor on which the shell is running

applyHTMLFormating

public static void applyHTMLFormating(org.eclipse.swt.custom.StyledText styledText)

Apply a very basic pseudo-HTML formating to a text stored in a StyledText widget. Supported tags are , , , , , and

Parameters:

styledText - styled text that contains an HTML text

blur

public static org.eclipse.swt.graphics.ImageData blur(org.eclipse.swt.graphics.ImageData originalImageData,
                                                      int radius)

Parameters:

originalImageData - The ImageData to be average blurred. Transparency information will be ignored.

radius - the number of radius pixels to consider when blurring image.

Returns:

A blurred copy of the image data, or null if an error occured.

enableAllChildrenWidgets

public static void enableAllChildrenWidgets(org.eclipse.swt.widgets.Control control)

Enable all widgets of a control

Parameters:

control - control to enable/disable

enable - true to enable, false to disable

disableAllChildrenWidgets

public static void disableAllChildrenWidgets(org.eclipse.swt.widgets.Control control)

Disable all widgets of a control

Parameters:

control - control to enable/disable

enable - true to enable, false to disable

buildFontFrom

public static org.eclipse.swt.graphics.Font buildFontFrom(org.eclipse.swt.widgets.Control control,
                                                          int style)

Build a font from a given control. Useful if we just want a bold label for example

Parameters:

control - control that handle the default font

style - new style

Returns:

a font with the given style

buildFontFrom

public static org.eclipse.swt.graphics.Font buildFontFrom(org.eclipse.swt.widgets.Control control,
                                                          int style,
                                                          int size)

Build a font from a given control. Useful if we just want a bold label for example

Parameters:

control - control that handle the default font

style - new style

Returns:

a font with the given style

isMacOS

public static boolean isMacOS()

Returns:

true if the operating system is MacOS, false otherwise

getDefaultColor

public static org.eclipse.swt.graphics.Color getDefaultColor(org.eclipse.swt.widgets.Control control,
                                                             int red,
                                                             int green,
                                                             int blue)

Parameters:

control -

red -

green -

blue -

Returns:

a color that will be disposed when control is disposed

computeWidth

public static int computeWidth(java.lang.String text)

Parameters:

text -

Returns:

the width of text