Package org.csstudio.ui.util.widgets

Class ImagePreview

java.lang.Object

org.eclipse.swt.widgets.Widget

org.eclipse.swt.widgets.Control

org.eclipse.swt.widgets.Scrollable

org.eclipse.swt.widgets.Composite

org.eclipse.swt.widgets.Canvas

org.csstudio.ui.util.widgets.ImagePreview

All Implemented Interfaces:

EventListener, DisposeListener, PaintListener, Drawable

public class ImagePreview
extends Canvas
implements DisposeListener, PaintListener

Widget that displays an image.

Similar to a Label with image, but image is resized to fit the widget.

Image can be provided as InputStream.

As a shortcut, the widget can also read a file.

Setting the Image directly is not supported to avoid issues with ownership and disposal of such an image.

Field Summary

Fields inherited from class org.eclipse.swt.widgets.Composite

embeddedHandle

Fields inherited from class org.eclipse.swt.widgets.Widget

handle

Constructor Summary

Constructors

Constructor	Description
ImagePreview(Composite parent)	Initialize empty

Method Summary

Modifier and Type	Method	Description
Point	computeSize(int wHint, int hHint)
void	paintControl(PaintEvent e)
void	setImage(InputStream image_stream)	Set image to display
void	setImage(String image_filename)	Set image to display
void	setMessage(String message)	Set a message that is displayed on top of the image
void	widgetDisposed(DisposeEvent e)

Methods inherited from class org.eclipse.swt.widgets.Canvas

drawBackground, getCaret, getIME, scroll, setCaret, setFont, setIME

Methods inherited from class org.eclipse.swt.widgets.Composite

changed, checkSubclass, drawBackground, getBackgroundMode, getChildren, getLayout, getLayoutDeferred, getTabList, isLayoutDeferred, layout, layout, layout, layout, layout, setBackgroundMode, setFocus, setLayout, setLayoutDeferred, setTabList, toString

Methods inherited from class org.eclipse.swt.widgets.Scrollable

computeTrim, getClientArea, getHorizontalBar, getScrollbarsMode, getVerticalBar, setScrollbarsMode

Methods inherited from class org.eclipse.swt.widgets.Control

addControlListener, addDragDetectListener, addFocusListener, addGestureListener, addHelpListener, addKeyListener, addMenuDetectListener, addMouseListener, addMouseMoveListener, addMouseTrackListener, addMouseWheelListener, addPaintListener, addTouchListener, addTraverseListener, computeSize, dragDetect, dragDetect, forceFocus, getAccessible, getBackground, getBackgroundImage, getBorderWidth, getBounds, getCursor, getDragDetect, getEnabled, getFont, getForeground, getLayoutData, getLocation, getMenu, getMonitor, getOrientation, getParent, getRegion, getShell, getSize, getTextDirection, getToolTipText, getTouchEnabled, getVisible, internal_dispose_GC, internal_new_GC, isAutoScalable, isEnabled, isFocusControl, isReparentable, isVisible, moveAbove, moveBelow, pack, pack, print, redraw, redraw, removeControlListener, removeDragDetectListener, removeFocusListener, removeGestureListener, removeHelpListener, removeKeyListener, removeMenuDetectListener, removeMouseListener, removeMouseMoveListener, removeMouseTrackListener, removeMouseWheelListener, removePaintListener, removeTouchListener, removeTraverseListener, requestLayout, setBackground, setBackgroundImage, setBounds, setBounds, setCapture, setCursor, setDragDetect, setEnabled, setForeground, setLayoutData, setLocation, setLocation, setMenu, setOrientation, setParent, setRedraw, setRegion, setSize, setSize, setTextDirection, setToolTipText, setTouchEnabled, setVisible, toControl, toControl, toDisplay, toDisplay, traverse, traverse, traverse, update

Methods inherited from class org.eclipse.swt.widgets.Widget

addDisposeListener, addListener, addTypedListener, checkWidget, dispose, getData, getData, getDisplay, getListeners, getStyle, getTypedListeners, isAutoDirection, isDisposed, isListening, notifyListeners, removeDisposeListener, removeListener, removeListener, removeListener, removeTypedListener, reskin, setData, setData

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

ImagePreview

public ImagePreview(Composite parent)

Initialize empty

Parameters:

parent - Parent widget

Method Details

setImage

public void setImage(String image_filename)

Set image to display

Parameters:

image_filename - Full path to image file or null for no image

setImage

public void setImage(InputStream image_stream)

Set image to display

Parameters:

image_stream - Image stream

setMessage

public void setMessage(String message)

Set a message that is displayed on top of the image

Parameters:

message - Message to display or null

computeSize

public Point computeSize(int wHint,
 int hHint)

Overrides:

computeSize in class Control

paintControl

public void paintControl(PaintEvent e)

Specified by:

paintControl in interface PaintListener

widgetDisposed

public void widgetDisposed(DisposeEvent e)

Specified by:

widgetDisposed in interface DisposeListener