com.smartgwt.client.widgets
Class Img

java.lang.Object
  com.google.gwt.user.client.ui.UIObject
      com.google.gwt.user.client.ui.Widget
          com.smartgwt.client.widgets.BaseWidget
              com.smartgwt.client.widgets.Canvas
                  com.smartgwt.client.widgets.StatefulCanvas
                      com.smartgwt.client.widgets.Img

All Implemented Interfaces:

HasAttachHandlers, HasHandlers, EventListener, IsWidget, HasClickHandlers, HasDoubleClickHandlers, HasDragMoveHandlers, HasDragRepositionMoveHandlers, HasDragRepositionStartHandlers, HasDragRepositionStopHandlers, HasDragResizeMoveHandlers, HasDragResizeStartHandlers, HasDragResizeStopHandlers, HasDragStartHandlers, HasDragStopHandlers, HasDropHandlers, HasDropMoveHandlers, HasDropOutHandlers, HasDropOverHandlers, HasFocusChangedHandlers, HasHoverHandlers, HasHoverHiddenHandlers, HasKeyDownHandlers, HasKeyPressHandlers, HasMouseDownHandlers, HasMouseMoveHandlers, HasMouseOutHandlers, HasMouseOverHandlers, HasMouseStillDownHandlers, HasMouseUpHandlers, HasMouseWheelHandlers, HasMovedHandlers, HasParentMovedHandlers, HasResizedHandlers, HasRightMouseDownHandlers, HasScrolledHandlers, HasShowContextMenuHandlers, HasVisibilityChangedHandlers

Direct Known Subclasses:

HeaderControl, ImgButton, ImgSplitbar, ToolStripSeparator

public class Img
extends StatefulCanvas

The Img widget class implements a simple widget that displays a single image.

Nested Class Summary

Nested classes/interfaces inherited from class com.google.gwt.user.client.ui.UIObject

UIObject.DebugIdImpl, UIObject.DebugIdImplEnabled

Field Summary

Fields inherited from class com.smartgwt.client.widgets.BaseWidget

config, configOnly, id, isElementSet, scClassName

Fields inherited from class com.google.gwt.user.client.ui.UIObject

DEBUG_ID_PREFIX

Constructor Summary

Img()

Img(JavaScriptObject jsObj)

Img(String src)

Img(String src, int width, int height)

Method Summary

protected JavaScriptObject	create()
String	getAltText() If specified this property will be included as the alt text for the image HMTL element.
void	getHoverHTML() If this.showHover is true, when the user holds the mouse over this Canvas for long enough to trigger a hover event, a hover canvas is shown by default.
Integer	getImageHeight() Explicit size for the image, for imageType settings that would normally use the image's natural size (applies to imageType "center" and "normal" only).
ImageStyle	getImageType() Indicates whether the image should be tiled/cropped, stretched, or centered when the size of this widget does not match the size of the image.
Integer	getImageWidth() Explicit size for the image, for imageType settings that would normally use the image's natural size (applies to imageType "center" and "normal" only).
static Img	getOrCreateRef(JavaScriptObject jsObj)
String	getPrompt() Prompt displayed in hover canvas if showHover is true.
Boolean	getShowTitle() Determines whether any specified title will be displayed for this component. Applies to Image-based components only, where the title will be rendered out in a label floating over the component
Integer	getSize() Convenience for setting height and width to the same value, at init time only
String	getSrc() The base filename for the image.
Boolean	getUsePNGFix() If false, never apply the png fix needed in Internet Explorer to make png transparency work correctly.
void	resetSrc() Refresh the image being shown.
void	setAltText(String altText) If specified this property will be included as the alt text for the image HMTL element.
static void	setDefaultProperties(Img imgProperties) Class level method to set the default properties of this class.
void	setImageHeight(Integer imageHeight) Explicit size for the image, for imageType settings that would normally use the image's natural size (applies to imageType "center" and "normal" only).
void	setImageType(ImageStyle imageType) Indicates whether the image should be tiled/cropped, stretched, or centered when the size of this widget does not match the size of the image.
void	setImageWidth(Integer imageWidth) Explicit size for the image, for imageType settings that would normally use the image's natural size (applies to imageType "center" and "normal" only).
void	setName(String name) The value of this attribute is specified as the value of the 'name' attribute in the resulting HTML.
void	setPrompt(String prompt) Prompt displayed in hover canvas if showHover is true.
void	setShowTitle(Boolean showTitle) Determines whether any specified title will be displayed for this component. Applies to Image-based components only, where the title will be rendered out in a label floating over the component
void	setSize(Integer size) Convenience for setting height and width to the same value, at init time only
void	setSrc(String src) The base filename for the image.
void	setUsePNGFix(Boolean usePNGFix) If false, never apply the png fix needed in Internet Explorer to make png transparency work correctly.

Methods inherited from class com.smartgwt.client.widgets.StatefulCanvas

addToRadioGroup, deselect, getActionType, getAlign, getAutoFit, getBaseStyle, getIcon, getIconHeight, getIconOrientation, getIconSize, getIconWidth, getOverCanvasConstructor, getRadioGroup, getRedrawOnStateChange, getSelected, getShowDisabled, getShowDisabledIcon, getShowDown, getShowDownIcon, getShowFocused, getShowFocusedAsOver, getShowFocusedIcon, getShowOverCanvas, getShowRollOver, getShowRollOverIcon, getShowSelectedIcon, getState, getStateSuffix, getTitle, getValign, isSelected, removeFromRadioGroup, removeFromRadioGroup, select, setActionType, setAlign, setAutoFit, setBaseStyle, setDefaultProperties, setIcon, setIconHeight, setIconOrientation, setIconSize, setIconWidth, setOverCanvasConstructor, setRadioGroup, setRedrawOnStateChange, setSelected, setShowDisabled, setShowDisabledIcon, setShowDown, setShowDownIcon, setShowFocused, setShowFocusedAsOver, setShowFocusedIcon, setShowOverCanvas, setShowRollOver, setShowRollOverIcon, setShowSelectedIcon, setState, setTitle, setTitleStyle, setValign

Methods inherited from class com.smartgwt.client.widgets.Canvas

addChild, addChild, addChild, addClickHandler, addDoubleClickHandler, addDragMoveHandler, addDragRepositionMoveHandler, addDragRepositionStartHandler, addDragRepositionStopHandler, addDragResizeMoveHandler, addDragResizeStartHandler, addDragResizeStopHandler, addDragStartHandler, addDragStopHandler, addDropHandler, addDropMoveHandler, addDropOutHandler, addDropOverHandler, addFocusChangedHandler, addHoverHandler, addHoverHiddenHandler, addKeyDownHandler, addKeyPressHandler, addMouseDownHandler, addMouseMoveHandler, addMouseOutHandler, addMouseOverHandler, addMouseStillDownHandler, addMouseUpHandler, addMouseWheelHandler, addMovedHandler, addParentMovedHandler, addPeer, addPeer, addResizedHandler, addRightMouseDownHandler, addScrolledHandler, addShowContextMenuHandler, addStyleName, addVisibilityChangedHandler, adjustForContent, animateFade, animateFade, animateFade, animateHide, animateHide, animateHide, animateMove, animateMove, animateMove, animateMove, animateRect, animateRect, animateRect, animateResize, animateResize, animateResize, animateScroll, animateScroll, animateScroll, animateShow, animateShow, animateShow, blur, bringToFront, clear, clickMaskUp, clickMaskUp, contains, contains, containsEvent, containsFocus, containsPoint, containsPoint, convertToCanvasArray, disable, enable, focus, getAbsoluteLeft, getAbsoluteTop, getAccessKey, getAnimateAcceleration, getAnimateFadeTime, getAnimateHideAcceleration, getAnimateHideTime, getAnimateMoveAcceleration, getAnimateMoveTime, getAnimateRectAcceleration, getAnimateRectTime, getAnimateResizeAcceleration, getAnimateResizeTime, getAnimateScrollAcceleration, getAnimateScrollTime, getAnimateShowAcceleration, getAnimateShowEffect, getAnimateShowTime, getAnimateTime, getAppImgDir, getAriaRole, getAutoDraw, getAutoShowParent, getBackgroundColor, getBackgroundImage, getBackgroundPosition, getBackgroundRepeat, getBorder, getBottom, getById, getCanAcceptDrop, getCanDrag, getCanDragReposition, getCanDragResize, getCanDragScroll, getCanDrop, getCanDropBefore, getCanFocus, getCanHover, getCanSelectText, getCanvasItem, getChildren, getChildrenSnapResizeToGrid, getChildrenSnapToGrid, getContents, getContextMenu, getCursor, getDataPath, getDefaultHeight, getDefaultWidth, getDestroyed, getDestroying, getDisabled, getDisabledCursor, getDoubleClickDelay, getDragAppearance, getDragIntersectStyle, getDragOpacity, getDragRepositionAppearance, getDragRepositionCursor, getDragResizeAppearance, getDragScrollDelay, getDragStartDistance, getDragTarget, getDragType, getDynamicContents, getEdgeBackgroundColor, getEdgeCenterBackgroundColor, getEdgeImage, getEdgeMarginSize, getEdgeOffset, getEdgeOpacity, getEdgeShowCenter, getEdgeSize, getExtraSpace, getFacetId, getFullDataPath, getGroupTitle, getHeight, getHeightAsString, getHoverAlign, getHoverAutoDestroy, getHoverComponent, getHoverDelay, getHoverHeight, getHoverMoveWithMouse, getHoverOpacity, getHoverStyle, getHoverVAlign, getHoverWidth, getHoverWrap, getHSnapOrigin, getHSnapOrigin, getHSnapPosition, getHSnapPosition, getHtmlPosition, getImgURL, getImgURL, getInnerContentHeight, getInnerContentWidth, getInnerHeight, getInnerWidth, getIsGroup, getLeft, getLeftAsString, getLocateChildrenBy, getLocateChildrenType, getLocatePeersBy, getLocatePeersType, getMargin, getMatchElement, getMaxHeight, getMaxWidth, getMenuConstructor, getMinHeight, getMinWidth, getMouseStillDownDelay, getMouseStillDownInitialDelay, getNextZIndex, getNoDoubleClicks, getOffsetHeight, getOffsetWidth, getOffsetX, getOffsetY, getOpacity, getOverflow, getPadding, getPageBottom, getPageLeft, getPageRect, getPageRight, getPageTop, getParentElement, getPercentBox, getPosition, getPrefix, getPrintHTML, getPrintHTML, getRect, getRedrawOnResize, getResizeBarTarget, getRight, getScrollbarSize, getScrollBottom, getScrollHeight, getScrollLeft, getScrollRight, getScrollTop, getScrollWidth, getShadowDepth, getShadowImage, getShadowOffset, getShadowSoftness, getShouldPrint, getShowCustomScrollbars, getShowDragShadow, getShowEdges, getShowHover, getShowHoverComponents, getShowResizeBar, getShowShadow, getSkinImgDir, getSnapAxis, getSnapEdge, getSnapHDirection, getSnapHGap, getSnapOffsetLeft, getSnapOffsetTop, getSnapOnDrop, getSnapResizeToGrid, getSnapTo, getSnapToGrid, getSnapVDirection, getSnapVGap, getStyleName, getTabIndex, getTooltip, getTop, getTopAsString, getUseOpacityFilter, getValuesManager, getViewportHeight, getViewportWidth, getVisibility, getVisibleHeight, getVisibleWidth, getVSnapOrigin, getVSnapOrigin, getVSnapPosition, getVSnapPosition, getWidth, getWidthAsString, getZIndex, handleHover, hide, hideClickMask, hideClickMask, hideContextMenu, imgHTML, imgHTML, imgHTML, intersects, isDirty, isDisabled, isDrawn, isVisible, keyUp, layoutChildren, linkHTML, linkHTML, markForDestroy, markForRedraw, markForRedraw, moveAbove, moveBelow, moveBy, moveTo, onInit, parentResized, printComponents, redraw, redraw, removeChild, removeChild, resizeBy, resizeTo, resizeTo, scrollBy, scrollByPercent, scrollTo, scrollTo, scrollToBottom, scrollToLeft, scrollToPercent, scrollToRight, scrollToTop, sendToBack, setAccessKey, setAllowExternalFilters, setAnimateAcceleration, setAnimateFadeTime, setAnimateHideAcceleration, setAnimateHideTime, setAnimateMoveAcceleration, setAnimateMoveTime, setAnimateRectAcceleration, setAnimateRectTime, setAnimateResizeAcceleration, setAnimateResizeTime, setAnimateScrollAcceleration, setAnimateScrollTime, setAnimateShowAcceleration, setAnimateShowEffect, setAnimateShowTime, setAnimateTime, setAppImgDir, setAriaRole, setAutoDraw, setAutoHeight, setAutoShowParent, setAutoWidth, setBackgroundColor, setBackgroundImage, setBackgroundPosition, setBackgroundRepeat, setBorder, setBottom, setCanAcceptDrop, setCanDrag, setCanDragReposition, setCanDragResize, setCanDragScroll, setCanDrop, setCanDropBefore, setCanFocus, setCanHover, setCanSelectText, setCanvasItem, setChildren, setChildrenSnapResizeToGrid, setChildrenSnapToGrid, setContents, setContextMenu, setCursor, setDataPath, setDefaultHeight, setDefaultProperties, setDefaultWidth, setDisabled, setDisabledCursor, setDoubleClickDelay, setDragAppearance, setDragIntersectStyle, setDragOpacity, setDragRepositionAppearance, setDragRepositionCursor, setDragResizeAppearance, setDragScrollDelay, setDragStartDistance, setDragTarget, setDragType, setDropTypes, setDynamicContents, setEdgeBackgroundColor, setEdgeCenterBackgroundColor, setEdgeImage, setEdgeMarginSize, setEdgeOffset, setEdgeOpacity, setEdgeShowCenter, setEdgeSize, setExtraSpace, setFacetId, setGroupTitle, setHeight, setHeight, setHeight100, setHoverAlign, setHoverAutoDestroy, setHoverDelay, setHoverHeight, setHoverMoveWithMouse, setHoverOpacity, setHoverStyle, setHoverVAlign, setHoverWidth, setHoverWrap, setHtmlPosition, setImage, setImage, setIsGroup, setKeepInParentRect, setKeepInParentRect, setLayoutAlign, setLayoutAlign, setLeft, setLeft, setLocateChildrenBy, setLocateChildrenType, setLocatePeersBy, setLocatePeersType, setMargin, setMatchElement, setMaxHeight, setMaxWidth, setMenuConstructor, setMinHeight, setMinWidth, setMouseStillDownDelay, setMouseStillDownInitialDelay, setNeverUseFilters, setNoDoubleClicks, setOpacity, setOverflow, setPadding, setPageLeft, setPageTop, setParentElement, setPercentBox, setPosition, setPrefix, setRect, setRect, setRedrawOnResize, setResizeBarTarget, setResizeFrom, setRight, setScrollbarSize, setShadowDepth, setShadowImage, setShadowOffset, setShadowSoftness, setShouldPrint, setShowCustomScrollbars, setShowDragShadow, setShowEdges, setShowHover, setShowHoverComponents, setShowResizeBar, setShowShadow, setSkinImgDir, setSmoothFade, setSnapAxis, setSnapEdge, setSnapHDirection, setSnapHGap, setSnapOffsetLeft, setSnapOffsetTop, setSnapOnDrop, setSnapResizeToGrid, setSnapTo, setSnapToGrid, setSnapVDirection, setSnapVGap, setStyleName, setTabIndex, setTooltip, setTop, setTop, setUseOpacityFilter, setValuesManager, setVisibility, setVisible, setWidth, setWidth, setWidth100, setZIndex, shouldDragScroll, show, showClickMask, showNextTo, showNextTo, showPrintPreview, showPrintPreview, showPrintPreview, showPrintPreview, showRecursively, updateHover, updateHover, updateShadow, visibleAtPoint, willAcceptDrop

Methods inherited from class com.smartgwt.client.widgets.BaseWidget

addDrawHandler, destroy, doAddHandler, doInit, doOnRender, draw, equals, error, errorIfNotCreated, fireEvent, getAttribute, getAttributeAsBoolean, getAttributeAsDate, getAttributeAsDouble, getAttributeAsElement, getAttributeAsFloat, getAttributeAsFloatArray, getAttributeAsInt, getAttributeAsIntArray, getAttributeAsJavaScriptObject, getAttributeAsMap, getAttributeAsString, getAttributeAsStringArray, getConfig, getDOM, getElement, getElement, getHandlerCount, getID, getInnerHTML, getJsObj, getOrCreateJsObj, getRef, getScClassName, hashCode, isConfigOnly, isCreated, onDestroy, onDraw, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setConfig, setConfigOnly, setDragTracker, setElement, setHtmlElement, setID, setNullProperty, setPosition, setProperty, setProperty, setProperty, setProperty, setProperty, setProperty, setProperty, setScClassName, toString

Methods inherited from class com.google.gwt.user.client.ui.Widget

addAttachHandler, addBitlessDomHandler, addDomHandler, addHandler, asWidget, asWidgetOrNull, createHandlerManager, delegateEvent, doAttachChildren, doDetachChildren, getLayoutData, getParent, isAttached, isOrWasAttached, onAttach, onBrowserEvent, onDetach, onLoad, onUnload, removeFromParent, setLayoutData, sinkEvents

Methods inherited from class com.google.gwt.user.client.ui.UIObject

addStyleDependentName, ensureDebugId, ensureDebugId, ensureDebugId, getStyleElement, getStyleName, getStylePrimaryName, getStylePrimaryName, isVisible, onEnsureDebugId, removeStyleDependentName, removeStyleName, setElement, setPixelSize, setSize, setStyleDependentName, setStyleName, setStyleName, setStyleName, setStylePrimaryName, setStylePrimaryName, setVisible, sinkBitlessEvent, unsinkEvents

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.google.gwt.event.shared.HasHandlers

fireEvent

Constructor Detail

Img

public Img()

Img

public Img(JavaScriptObject jsObj)

Img

public Img(String src)

Img

public Img(String src,
           int width,
           int height)

Method Detail

getOrCreateRef

public static Img getOrCreateRef(JavaScriptObject jsObj)

create

protected JavaScriptObject create()

Overrides:

create in class StatefulCanvas

setAltText

public void setAltText(String altText)

If specified this property will be included as the alt text for the image HMTL element. This is useful for improving application accessibility.

altText and hover prompt / tooltip behavior: Note that some browsers, including Internet Explorer 9, show a native hover tooltip containing the img tag's alt attribute. Developers should not rely on this behavior to show the user a hover prompt - instead the prompt attribute should be used.
To set alt text and ensure a hover prompt shows up in all browsers, developers may set prompt and altText to the same value. If both these attributes are set, the standard Smart GWT prompt behavior will show a hover prompt in most browsers, but will be suppressed for browsers where a native tooltip is shown for altText. Note that setting altText and prompt to different values is not recommended - the prompt value will be ignored in favor of the altText in this case.

Parameters:

altText - altText Default value is null

See Also:

Accessibility overview and related methods

getAltText

public String getAltText()

If specified this property will be included as the alt text for the image HMTL element. This is useful for improving application accessibility.

altText and hover prompt / tooltip behavior: Note that some browsers, including Internet Explorer 9, show a native hover tooltip containing the img tag's alt attribute. Developers should not rely on this behavior to show the user a hover prompt - instead the prompt attribute should be used.
To set alt text and ensure a hover prompt shows up in all browsers, developers may set prompt and altText to the same value. If both these attributes are set, the standard Smart GWT prompt behavior will show a hover prompt in most browsers, but will be suppressed for browsers where a native tooltip is shown for altText. Note that setting altText and prompt to different values is not recommended - the prompt value will be ignored in favor of the altText in this case.

Returns:

String

See Also:

Accessibility overview and related methods

setImageHeight

public void setImageHeight(Integer imageHeight)
                    throws IllegalStateException

Explicit size for the image, for imageType settings that would normally use the image's natural size (applies to imageType "center" and "normal" only).

Parameters:

imageHeight - imageHeight Default value is null

Throws:

IllegalStateException - this property cannot be changed after the component has been created

getImageHeight

public Integer getImageHeight()

Explicit size for the image, for imageType settings that would normally use the image's natural size (applies to imageType "center" and "normal" only).

Returns:

Integer

setImageType

public void setImageType(ImageStyle imageType)

Indicates whether the image should be tiled/cropped, stretched, or centered when the size of this widget does not match the size of the image. CENTER shows the image in it's natural size, but can't do so while the transparency fix is active for IE. The transparency fix can be manually disabled by setting usePNGFix to false. See ImageStyle for further details.

If this method is called after the component has been drawn/initialized: Change the style of image rendering.

Parameters:

imageType - new style of image rendering. Default value is Img.STRETCH

See Also:

Appearance overview and related methods

getImageType

public ImageStyle getImageType()

Indicates whether the image should be tiled/cropped, stretched, or centered when the size of this widget does not match the size of the image. CENTER shows the image in it's natural size, but can't do so while the transparency fix is active for IE. The transparency fix can be manually disabled by setting usePNGFix to false. See ImageStyle for further details.

Returns:

ImageStyle

See Also:

Appearance overview and related methods

setImageWidth

public void setImageWidth(Integer imageWidth)
                   throws IllegalStateException

Explicit size for the image, for imageType settings that would normally use the image's natural size (applies to imageType "center" and "normal" only).

Parameters:

imageWidth - imageWidth Default value is null

Throws:

IllegalStateException - this property cannot be changed after the component has been created

getImageWidth

public Integer getImageWidth()

Explicit size for the image, for imageType settings that would normally use the image's natural size (applies to imageType "center" and "normal" only).

Returns:

Integer

setName

public void setName(String name)
             throws IllegalStateException

The value of this attribute is specified as the value of the 'name' attribute in the resulting HTML.

Note: this attribute is ignored if the imageType is set to "tile"

Note : This is an advanced setting

Parameters:

name - name Default value is "main"

Throws:

IllegalStateException - this property cannot be changed after the component has been created

setPrompt

public void setPrompt(String prompt)

Prompt displayed in hover canvas if showHover is true.

Overrides:

setPrompt in class Canvas

Parameters:

prompt - prompt Default value is null

See Also:

Hovers / Tooltips Example

getPrompt

public String getPrompt()

Prompt displayed in hover canvas if showHover is true.

Overrides:

getPrompt in class Canvas

Returns:

String

See Also:

Hovers / Tooltips Example

setShowTitle

public void setShowTitle(Boolean showTitle)

Determines whether any specified title will be displayed for this component.
Applies to Image-based components only, where the title will be rendered out in a label floating over the component

Note : This is an advanced setting

Parameters:

showTitle - showTitle Default value is false

getShowTitle

public Boolean getShowTitle()

Determines whether any specified title will be displayed for this component.
Applies to Image-based components only, where the title will be rendered out in a label floating over the component

Returns:

Boolean

setSize

public void setSize(Integer size)
             throws IllegalStateException

Convenience for setting height and width to the same value, at init time only

Parameters:

size - size Default value is null

Throws:

IllegalStateException - this property cannot be changed after the component has been created

See Also:

Sizing overview and related methods

getSize

public Integer getSize()

Convenience for setting height and width to the same value, at init time only

Returns:

Integer

See Also:

Sizing overview and related methods

setSrc

public void setSrc(String src)

The base filename for the image.

If img.state is set, it's value will be appended to the URL before the file extension.

For example, given an src of "findIcon.gif" and a state of "Disabled", the resulting image name would be "findIcon_Disabled.gif". Compound states such as "Selected", "Focused" and "Over" or "Down" will have an intervening underscore, resulting in, for example, "findIcon_Selected_Down.gif".

If this method is called after the component has been drawn/initialized: Changes the URL of this image and redraws it.

Does nothing if the src has not changed - if src has not changed but other state has changed such that the image needs updating, call Img.resetSrc instead.

Parameters:

src - new URL for the image. Default value is "blank.gif"

See Also:

Appearance overview and related methods

getSrc

public String getSrc()

The base filename for the image.

If img.state is set, it's value will be appended to the URL before the file extension.

For example, given an src of "findIcon.gif" and a state of "Disabled", the resulting image name would be "findIcon_Disabled.gif". Compound states such as "Selected", "Focused" and "Over" or "Down" will have an intervening underscore, resulting in, for example, "findIcon_Selected_Down.gif".

Returns:

String

See Also:

Appearance overview and related methods

setUsePNGFix

public void setUsePNGFix(Boolean usePNGFix)
                  throws IllegalStateException

If false, never apply the png fix needed in Internet Explorer to make png transparency work correctly.

Parameters:

usePNGFix - usePNGFix Default value is true

Throws:

IllegalStateException - this property cannot be changed after the component has been created

getUsePNGFix

public Boolean getUsePNGFix()

If false, never apply the png fix needed in Internet Explorer to make png transparency work correctly.

Returns:

Boolean

getHoverHTML

public void getHoverHTML()

If this.showHover is true, when the user holds the mouse over this Canvas for long enough to trigger a hover event, a hover canvas is shown by default. This method returns the contents of that hover canvas.

Overridden from Canvas:
If prompt is specified, and altText is unset, default implementation is unchanged - the prompt text will be displayed in the hover.
If altText and prompt are set this method will return null to suppress the standard hover behavior in browsers where the alt attribute on an img tag causes a native tooltip to appear, such as Internet Explorer. On other browsers the altText value will be returned.

Overrides:

getHoverHTML in class Canvas

resetSrc

public void resetSrc()

Refresh the image being shown. Call this when the src attribute has not changed, but other state that affects the image URL (such as being selected) has changed.

setDefaultProperties

public static void setDefaultProperties(Img imgProperties)

Class level method to set the default properties of this class. If set, then all subsequent instances of this class will automatically have the default properties that were set when this method was called. This is a powerful feature that eliminates the need for users to create a separate hierarchy of subclasses that only alter the default properties of this class. Can also be used for skinning / styling purposes.

Note: This method is intended for setting default attributes only and will effect all instances of the underlying class (including those automatically generated in JavaScript). This method should not be used to apply standard EventHandlers or override methods for a class - use a custom subclass instead.

Parameters:

imgProperties - properties that should be used as new defaults when instances of this class are created