Rogue Wave JViews Gantt JavaScript Reference: Class IlvGanttComponentView

Class IlvGanttComponentView

IlvObject
   |
   +--IlvEmptyView
      |
      +--IlvResizableView
         |
         +--IlvAbstractView
            |
            +--IlvGanttComponentView

Category:: Gantt Chart component

JavaScript File:: IlvGanttView.js

Description:: An IlvGanttComponentView is the abstract base class of the DHTML components that display an image of a Gantt chart subcomponent. The image is obtained from an IlvGanttServlet running on the server. You must call the setServletURL() method to set the URL of the servlet. The class IlvInteractor allows you to implement some interaction on the view.

Constructor Summary
Constructor Attributes	Constructor Name and Description
	IlvGanttComponentView(comp, left, top, width, height, reload, namespace)

Method Summary
Method Attributes	Method Name and Description
	addCapabilitiesLoadListener(listener) Adds a listener to be called when the capabilities have been loaded.
	addErrorListener(listener) Adds a listener to be called when an error occurs during the current request to the server.
	addImageLoadingListener(listener) Adds a listener to be called when the view has begun loading a new image.
	addImageLoadListener(listener) Adds a listener to be called when the view has loaded a new image.
	addImagePreloadListener(listener) Adds a listener to be called when the view has loaded a new image, but before the new image is made visible.
	addInteractorListener(listener) Adds a listener to be called when an interactor has changed on the view.
	addTimeoutErrorListener(listener) Adds a listener to be called when a timeout has occurred during the current request to the server.
	addVerticalScrollListener(listener) Adds a listener to be called when the image has scrolled vertically.
	childrenToHTML(parentNode) Creates the HTML for this component's children.
	createCapabilitiesRequestURL() Creates the HTTP request for capabilities.
	createImageRequestURL(imageWidth, imageHeight) Creates the URL for the image request.
	dispose() Disposes of all resources being used by the view.
	getAgainParam() Returns a time stamp parameter for the requests.
	getBlendTransform() Returns whether new images will be revealed by fading the previous image.
	getCapabilities() Queries the server for the capabilities.
	getDateParam(name, date) Returns a date parameter for the requests.
	getGanttView() Returns the `IlvGanttView` that is the parent of this view.
	getImageFormat() Returns the image format used by the server to render this view's contents.
	getImageScrollPosition() Returns the scroll position of this view's image on the client side.
	getMaxVerticalScrollPosition() Returns the maximum vertical scroll position.
	getMessagePanel() Returns the message panel where the messages will be displayed
	getPopupMenu() Returns the pop-up menu on set this view.
	getServletURL() Returns the URL of the servlet as set using `setServletURL`.
	getSiblingViews() Returns an array of the siblings of this view, or `null` if this view has no siblings.
	getTimeoutErrorInterval() Returns the timeout interval for requests to the server, in seconds.
	getUpdateImageOnResize() Returns whether the view should request a new image from the server based upon the resize that has just occurred.
	getUpdateInterval() Returns the automatic update interval of the view, in seconds.
	getVerticalScrollPosition() Returns the vertical scroll position of the image.
	getWaitingImage() Returns the URL of the image used to show that the component is waiting for a server response.
	init() Initializes the view.
	isAutoUpdateCapabilities() Returns whether the automatic update will also update the capabilities.
	isCapabilitiesLoaded() Indicates if the capabilities have been loaded from the server.
	isImageLoaded() Returns whether an image is loaded in the view.
	isVisible() Return the component view is visible or not.
	keyDown(e) Handles Key down events
	keyPress(e) Handles Key press events
	keyUp(e) Handles Key up events
	mouseDown(e) Handles Mouse down events.
	mouseDrag(e) Handles Mouse drag events.
	mouseMove(e) Handles Mouse move events.
	mouseOut(e) Handles Mouse out events.
	mouseOver(e) Handles Mouse over events.
	mouseUp(e) Handles Mouse up events.
	onCapabilitiesLoaded(context) This method is automatically invoked when the capabilities have been loaded from the server.
	performAction(actionName, params, udpateAll) Performs an action on the server side.
	readAdditionalCapabilities(context) Reads additional information generated by the capabilities request.
	removeCapabilitiesLoadListener(listener) Removes a listener installed with `addCapabilitiesLoadListener`.
	removeErrorListener(listener) Removes a listener installed with `addErrorListener`.
	removeImageLoadListener(listener) Removes a listener installed with `addImageLoadListener`.
	removeImagePreloadListener(listener) Removes a listener installed with `addImagePreloadListener`.
	removeInteractorListener(listener) Removes a listener installed with `addInteractorListener`.
	removeTimeoutErrorListener(listener) Removes a listener installed with `addTimeoutErrorListener`.
	setAutoUpdateCapabilities(set) When set to `true` the automatic update will also update the capabilities.
	setBlendTransform(set) Sets whether new images will be revealed by fading the previous image.
	setChildrenBounds(left, top, width, height) Changes the size of this view's children.
	setImageFormat(format) Sets the image format used by the server to render this view's contents.
	setImageScrollPosition(x, y) Sets the scroll position of this view's image on the client side.
	setMessagePanel(ilvHTMLPanel) Sets the message panel where the message will be displayed
	setPopupMenu(popupMenu) Sets the pop-up menu on this view.
	setServletURL(servletURL) Sets the URL of the servlet that the view will send requests to.
	setTimeoutErrorInterval(interval) Sets the timeout interval for requests to the server.
	setUpdateInterval(rate) Sets the automatic update interval of the view.
	setVerticalScrollPosition(y) Queries a new image showing the image scrolled to the specified vertical position.
	setVisible(visible) Sets the component view is visible or not.
	setWaitingImage(image) Sets the URL of the image used to show that the component is waiting for a server response.
	startErrorTimer() Starts a timer for errors.
	startUpdateTimer() Starts the update timer.
	stopErrorTimer() Stops the error timer.
	stopUpdateTimer() Stops the update timer.
	timeoutError() This method is automatically invoked when a timeout error occurs during a request to the server.
	trimScrollPosition() Trims the view's current time scroll and vertical scroll values to be within the valid ranges determined by the capabilities.
	updateAll() Queries new capabilities and a new image from the server.
	updateImage() Queries the server for a new image.

Methods inherited from class IlvAbstractView
getCursor, getGlassView, getHitInfos, getHitInfoTypes, getInteractor, putHitInfoType, setAccessible, setAdditionalParameters, setCursor, setHitmapLayers, setInteractor, setScrollBarSize, setScrollBarState

Methods inherited from class IlvResizableView
getMaximumSize, getMinimumSize, isResizable, setHotkeys, setMaximumSize, setMinimumSize, setResizable, toHTML

Methods inherited from class IlvEmptyView
addSizeListener, getBounds, getHeight, getLeft, getLocation, getSize, getTop, getWidth, isStateInCookie, removeSizeListener, restoreState, saveState, setBounds, setLocation, setSize, setStateInCookie

Methods inherited from class IlvObject
getClassName, hashCode, instanceOf, invoke, registerDispose, registerDisposeByClientId, removeHTML, setClassName, superConstructor, superInvoke, toString, updateVisibility

Constructor Detail

IlvGanttComponentView

IlvGanttComponentView(comp, left, top, width, height, reload, namespace)

Parameters:

comp - The Gantt chart subcomponent to be displayed in the panel. The value must be one of the strings: "chart", "table", or "sheet".

left - The absolute x position of the view on the page.

top - The absolute y position of the view on the page.

width - The width of the view.

height - The height of the view.

reload - An optional Boolean value that specifies whether the view should be initialized from a temporary cookie that persists for the current browser session. When omitted, defaults to false.

namespace - An optional parameter to place the view in a namespace. This is useful when using IlvGanttComponentViews in multiple browser windows or in multiple frames of a frameset and the views must store cookies that should not conflict with each other. In this case, use the namespace to uniquely identify the views that belong to a specific browser window or frameset frame. For example, if you have created a new window with a unique name:


                    open(childPageURL, uniqueWindowName, ...);

you can then use the window name to define the namespace for views within the child page:


                    var view = new IlvGanttComponentView(..., window.name);

Method Detail

addCapabilitiesLoadListener

addCapabilitiesLoadListener(listener)

Adds a listener to be called when the capabilities have been loaded.

Parameters:

listener - The listener function, which must have the following parameter:

view: The IlvGanttComponentView.

addErrorListener

addErrorListener(listener)

Adds a listener to be called when an error occurs during the current request to the server.

Parameters:

listener - The listener function, which must have the following parameter:

view: The IlvGanttComponentView.

addImageLoadingListener

addImageLoadingListener(listener)

Adds a listener to be called when the view has begun loading a new image.

Parameters:

listener - The listener function, which must have the following parameter:

view: The IlvGanttComponentView.

addImageLoadListener

addImageLoadListener(listener)

Adds a listener to be called when the view has loaded a new image.

Parameters:

listener - The listener function, which must have the following parameter:

view: The IlvGanttComponentView.

addImagePreloadListener

addImagePreloadListener(listener)

Adds a listener to be called when the view has loaded a new image, but before the new image is made visible.

Parameters:

listener - The listener function, which must have the following parameter:

view: The IlvGanttComponentView.

addInteractorListener

addInteractorListener(listener)

Adds a listener to be called when an interactor has changed on the view.

Parameters:

listener - The listener function, which must have the following parameters:

view: The IlvGanttComponentView.
oldInteractor: The old interactor (IlvInteractor).
newInteractor: The new interactor (IlvInteractor).

addTimeoutErrorListener

addTimeoutErrorListener(listener)

Adds a listener to be called when a timeout has occurred during the current request to the server.

Parameters:

listener - The listener function, which must have the following parameter:

view: The IlvGanttComponentView.

addVerticalScrollListener

addVerticalScrollListener(listener)

Adds a listener to be called when the image has scrolled vertically.

Parameters:

listener - The listener function, which must have the following parameter:

view: The IlvGanttComponentView.

childrenToHTML

childrenToHTML(parentNode)

Creates the HTML for this component's children. Warning: This method is considered to be part of an IlvGanttComponentView's internal implementation and is not a public API.

Parameters:: parentNode

createCapabilitiesRequestURL

createCapabilitiesRequestURL()

Creates the HTTP request for capabilities.

createImageRequestURL

createImageRequestURL(imageWidth, imageHeight)

Creates the URL for the image request.

Parameters:: imageWidth; imageHeight

dispose

dispose()

Disposes of all resources being used by the view. Make sure to call IlvObject.callDispose() function on the onunload event of the page:

 <body onunload="IlvObject.callDispose()">

getAgainParam

getAgainParam()

Returns a time stamp parameter for the requests. This parameter is not used by the server side. Instead, it can be appended to requests in order to prevent caching by the browser and force the request to be sent to the server.

getBlendTransform

getBlendTransform()

Returns whether new images will be revealed by fading the previous image. The default value is true.

getCapabilities

getCapabilities()

Queries the server for the capabilities. When the capabilities are completely loaded into the view, the onCapabilitiesLoaded method is automatically invoked. The default capabilities sent by the server side are stored as the following instance variables of the view:

cap_tableWidth - The total width of all table columns.
cap_tableHeight - The total height of all table rows.
cap_tableHeaderHeight - The height of the table header and the time scale.
cap_rowHeight - The height of each row.
cap_rowCount - The number of visible rows.
cap_visibleTime - The start of the visible interval as a Date object.
cap_minVisibleTime - The minimum visible Date allowed.
cap_maxVisibleTime - The maximum visible Date allowed.
cap_dataStartTime - The start Date of the current Gantt data model.
cap_dataEndTime - The end Date of the current Gantt data model.

Refer to the documentation for the IlvGanttServletSupport class for an explanation of the capabilities format sent by the server side.

getDateParam

getDateParam(name, date)

Returns a date parameter for the requests.

Parameters:: name; date

getGanttView

getGanttView()

Returns the IlvGanttView that is the parent of this view. This method returns null if this view has no parent.

getImageFormat

getImageFormat()

Returns the image format used by the server to render this view's contents. The default value is 'JPEG'.

getImageScrollPosition

getImageScrollPosition()

Returns the scroll position of this view's image on the client side. Note: this is very different from the getVerticalPosition or getVisibleInterval methods that return the scroll position of the component on the server side.

Returns:: An object with two properties: x and y.

getMaxVerticalScrollPosition

getMaxVerticalScrollPosition()

Returns the maximum vertical scroll position.

getMessagePanel

getMessagePanel()

Returns the message panel where the messages will be displayed

getPopupMenu

getPopupMenu()

Returns the pop-up menu on set this view.

Since:: JViews 7.5

Returns:: the pop-up menu.

getServletURL

getServletURL()

Returns the URL of the servlet as set using setServletURL.

getSiblingViews

getSiblingViews()

Returns an array of the siblings of this view, or null if this view has no siblings. For example, if this view is an IlvGanttTableView that is a child of an IlvGanttView, this method will return a single element array containing the Gantt view's IlvGanttSheetView child.

getTimeoutErrorInterval

getTimeoutErrorInterval()

Returns the timeout interval for requests to the server, in seconds. The default value is 600 (or 10 minutes).

getUpdateImageOnResize

getUpdateImageOnResize()

Returns whether the view should request a new image from the server based upon the resize that has just occurred.

getUpdateInterval

getUpdateInterval()

Returns the automatic update interval of the view, in seconds. The default value is 0, indicating no updates.

getVerticalScrollPosition

getVerticalScrollPosition()

Returns the vertical scroll position of the image.

getWaitingImage

getWaitingImage()

Returns the URL of the image used to show that the component is waiting for a server response. The default value is the image: IlvConstants.ilvImagePath + "wait.gif", where IlvConstants.ilvImagePath = "script/images/".

init

init()

Initializes the view. This method must be called on the onLoad event of the page containing the view.

isAutoUpdateCapabilities

isAutoUpdateCapabilities()

Returns whether the automatic update will also update the capabilities.

isCapabilitiesLoaded

isCapabilitiesLoaded()

Indicates if the capabilities have been loaded from the server.

isImageLoaded

isImageLoaded()

Returns whether an image is loaded in the view.

isVisible

isVisible()

Return the component view is visible or not.

Since:: JViews 8.8

keyDown

keyDown(e)

Handles Key down events

Parameters:

e - The key event with the following read-only properties:

e.type: A string representing the event type.
e.keyCode: The code of the key.

keyPress

keyPress(e)

Handles Key press events

Parameters:

e - The key event with the following read-only properties:

e.type: A string representing the event type.
e.keyCode: The code of the key.

keyUp

keyUp(e)

Handles Key up events

Parameters:

e - The key event with the following read-only properties:

e.type: A string representing the event type.
e.keyCode: The code of the key.

mouseDown

mouseDown(e)

Handles Mouse down events.

Parameters:

e - The mouse event with the following read-only properties:

e.type: A string representing the event type.
e.mouseX: The mouse coordinates relative to the view.
e.mouseY: The mouse coordinates relative to the view.
e.screenX: The absolute mouse coordinates in the screen.
e.screenY: The absolute mouse coordinates in the screen.
e.altKey: A Boolean, true when the ALT key is pressed.
e.ctrlKey: A Boolean, true when the CONTROL key is pressed.
e.shiftKey: A Boolean, true when the SHIFT key is pressed.

mouseDrag

mouseDrag(e)

Handles Mouse drag events.

Parameters:

e - The mouse event with the following read-only properties:

e.type: A string representing the event type.
e.mouseX: The mouse coordinates relative to the view.
e.mouseY: The mouse coordinates relative to the view.
e.screenX: The absolute mouse coordinates in the screen.
e.screenY: The absolute mouse coordinates in the screen.
e.altKey: A Boolean, true when the ALT key is pressed.
e.ctrlKey: A Boolean, true when the CONTROL key is pressed.
e.shiftKey: A Boolean, true when the SHIFT key is pressed.

mouseMove

mouseMove(e)

Handles Mouse move events.

Parameters:

e - The mouse event with the following read-only properties:

e.type: A string representing the event type.
e.mouseX: The mouse coordinates relative to the view.
e.mouseY: The mouse coordinates relative to the view.
e.screenX: The absolute mouse coordinates in the screen.
e.screenY: The absolute mouse coordinates in the screen.
e.altKey: A Boolean, true when the ALT key is pressed.
e.ctrlKey: A Boolean, true when the CONTROL key is pressed.
e.shiftKey: A Boolean, true when the SHIFT key is pressed.

mouseOut

mouseOut(e)

Handles Mouse out events.

Parameters:

e - The mouse event with the following read-only properties:

e.type: A string representing the event type.
e.mouseX: The mouse coordinates relative to the view.
e.mouseY: The mouse coordinates relative to the view.
e.screenX: The absolute mouse coordinates in the screen.
e.screenY: The absolute mouse coordinates in the screen.
e.altKey: A Boolean, true when the ALT key is pressed.
e.ctrlKey: A Boolean, true when the CONTROL key is pressed.
e.shiftKey: A Boolean, true when the SHIFT key is pressed.

mouseOver

mouseOver(e)

Handles Mouse over events.

Parameters:

e - The mouse event with the following read-only properties:

e.type: A string representing the event type.
e.mouseX: The mouse coordinates relative to the view.
e.mouseY: The mouse coordinates relative to the view.
e.screenX: The absolute mouse coordinates in the screen.
e.screenY: The absolute mouse coordinates in the screen.
e.altKey: A Boolean, true when the ALT key is pressed.
e.ctrlKey: A Boolean, true when the CONTROL key is pressed.
e.shiftKey: A Boolean, true when the SHIFT key is pressed.

mouseUp

mouseUp(e)

Handles Mouse up events.

Parameters:

e - The mouse event with the following read-only properties:

e.type: A string representing the event type.
e.mouseX: The mouse coordinates relative to the view.
e.mouseY: The mouse coordinates relative to the view.
e.screenX: The absolute mouse coordinates in the screen.
e.screenY: The absolute mouse coordinates in the screen.
e.altKey: A Boolean, true when the ALT key is pressed.
e.ctrlKey: A Boolean, true when the CONTROL key is pressed.
e.shiftKey: A Boolean, true when the SHIFT key is pressed.

onCapabilitiesLoaded

onCapabilitiesLoaded(context)

This method is automatically invoked when the capabilities have been loaded from the server. This method stores the default capabilities and then calls the readAdditionalCapabilities method to store any additional information sent by the server. The default capabilities sent by the server side are stored as the following instance variables of the view:

cap_tableWidth - The total width of all table columns.
cap_tableHeight - The total height of all table rows.
cap_tableHeaderHeight - The height of the table header and the time scale.
cap_rowHeight - The height of each row.
cap_rowCount - The number of visible rows.
cap_visibleTime - The start of the visible interval as a Date object.
cap_minVisibleTime - The minimum visible Date allowed.
cap_maxVisibleTime - The maximum visible Date allowed.
cap_dataStartTime - The start Date of the current Gantt data model.
cap_dataEndTime - The end Date of the current Gantt data model.

Refer to the documentation for the IlvGanttServletSupport class for an explanation of the capabilities format sent by the server side.

Parameters:: context

performAction

performAction(actionName, params, udpateAll)

Performs an action on the server side. This method requests a new image from the server. Optionally, new capabilities can also be requested from the server before the image is retrieved. Additional parameters are sent in the request so that an action can be performed on the server side before the capabilities and image are generated. This allows you to define a new type of interaction on the image. To implement the action on the server side, you must implement the IlvServerAction interface and register the action with an instance of IlvGanttServletSupport. An action is defined by a name and a list of parameters.

Parameters:: actionName - The name of the action.; params - The parameters of the action as an array of strings.; udpateAll - true to update capabilities and the image, false to update only the image.

readAdditionalCapabilities

readAdditionalCapabilities(context)

Reads additional information generated by the capabilities request. This implementation does nothing. Subclasses should override this method to read additional variables generated by the server.

Parameters:: context - The object that contains the JavaScript variables generated by the server.

removeCapabilitiesLoadListener

removeCapabilitiesLoadListener(listener)

Removes a listener installed with addCapabilitiesLoadListener.

Parameters:: listener - The listener to remove.

removeErrorListener

removeErrorListener(listener)

Removes a listener installed with addErrorListener.

Parameters:: listener - The listener to remove.

removeImageLoadListener

removeImageLoadListener(listener)

Removes a listener installed with addImageLoadListener.

Parameters:: listener - The listener to remove.

removeImagePreloadListener

removeImagePreloadListener(listener)

Removes a listener installed with addImagePreloadListener.

Parameters:: listener - The listener to remove.

removeInteractorListener

removeInteractorListener(listener)

Removes a listener installed with addInteractorListener.

Parameters:: listener - The listener to remove.

removeTimeoutErrorListener

removeTimeoutErrorListener(listener)

Removes a listener installed with addTimeoutErrorListener.

Parameters:: listener - The listener to remove.

setAutoUpdateCapabilities

setAutoUpdateCapabilities(set)

When set to true the automatic update will also update the capabilities.

Parameters:: set

setBlendTransform

setBlendTransform(set)

Sets whether new images will be revealed by fading the previous image. The default value is true. This method is available only on Internet Explorer and will be ignored on Netscape Communicator.

Parameters:: set

setChildrenBounds

setChildrenBounds(left, top, width, height)

Changes the size of this view's children. Warning: This method is considered to be part of an IlvGanttComponentView's internal implementation and is not a public API.

Parameters:: left - The absolute x position of the view on the page.; top - The absolute y position of the view on the page.; width - The width of the view.; height - The height of the view.

setImageFormat

setImageFormat(format)

Sets the image format used by the server to render this view's contents.

Parameters:: format - The image format to use. Possible values are: 'JPEG', 'PNG', or any other format that has been registered on the server side with IlvGanttServletSupport.setImageEncoder. The default value is 'JPEG'.

setImageScrollPosition

setImageScrollPosition(x, y)

Sets the scroll position of this view's image on the client side. Note: this is very different from the setVerticalPosition or scrollTo methods that query an image of a scrolled component from the server.

Parameters:: x - The scroll position along the x-axis, relative to the top of the view.; y - The scroll position along the y-axis, relative to the left side of the view.

setMessagePanel

setMessagePanel(ilvHTMLPanel)

Sets the message panel where the message will be displayed

Parameters:: ilvHTMLPanel - An instance of IlvHTMLPanel.

setPopupMenu

setPopupMenu(popupMenu)

Sets the pop-up menu on this view.

Parameters:: popupMenu - the pop-up menu to set.

Since:: JViews 7.5

setServletURL

setServletURL(servletURL)

Sets the URL of the servlet that the view will send requests to.

Parameters:: servletURL

setTimeoutErrorInterval

setTimeoutErrorInterval(interval)

Sets the timeout interval for requests to the server.

Parameters:: interval - The timeout, specified in seconds. The default value is 600 (or 10 minutes).

setUpdateInterval

setUpdateInterval(rate)

Sets the automatic update interval of the view.

Parameters:: rate - The automatic update interval, specified in seconds. The default value of 0 indicates that automatic updates should stop.

setVerticalScrollPosition

setVerticalScrollPosition(y)

Queries a new image showing the image scrolled to the specified vertical position.

Parameters:: y - The vertical scroll position.

setVisible

setVisible(visible)

Sets the component view is visible or not.

Parameters:: visible

Since:: JViews 8.8

setWaitingImage

setWaitingImage(image)

Sets the URL of the image used to show that the component is waiting for a server response. The image may be an animated GIF. The default value is the image: IlvConstants.ilvImagePath + "wait.gif", where IlvConstants.ilvImagePath = "script/images/".

Parameters:: image

startErrorTimer

startErrorTimer()

Starts a timer for errors.

startUpdateTimer

startUpdateTimer()

Starts the update timer.

stopErrorTimer

stopErrorTimer()

Stops the error timer.

stopUpdateTimer

stopUpdateTimer()

Stops the update timer.

timeoutError

timeoutError()

This method is automatically invoked when a timeout error occurs during a request to the server.

trimScrollPosition

trimScrollPosition()

Trims the view's current time scroll and vertical scroll values to be within the valid ranges determined by the capabilities.

updateAll

updateAll()

Queries new capabilities and a new image from the server.

updateImage

updateImage()

Queries the server for a new image.