com.google.gwt.user.cellview.client

Class AbstractPager

java.lang.Object

com.google.gwt.user.client.ui.UIObject

com.google.gwt.user.client.ui.Widget

com.google.gwt.user.client.ui.Composite

com.google.gwt.user.cellview.client.AbstractPager

All Implemented Interfaces:

HasAttachHandlers, HasHandlers, EventListener, HasVisibility, IsRenderable, IsWidget

Direct Known Subclasses:

PageSizePager, SimplePager

public abstract class AbstractPager
extends Composite

An abstract pager that exposes many methods useful for paging.

Nested Class Summary

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

UIObject.DebugIdImpl, UIObject.DebugIdImplEnabled

Field Summary

Fields

Modifier and Type	Field and Description
(package private) HandlerRegistration	rangeChangeHandler
(package private) HandlerRegistration	rowCountChangeHandler

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

DEBUG_ID_PREFIX

Constructor Summary

Constructors

Constructor and Description
AbstractPager()

Method Summary

Modifier and Type	Method and Description
protected void	firstPage() Go to the first page.
HasRows	getDisplay() Get the HasRows being paged.
protected int	getPage() Get the current page index.
protected int	getPageCount() Get the number of pages based on the data size.
int	getPageSize() Get the page size.
int	getPageStart() Get the page start index.
protected boolean	hasNextPage() Returns true if there is enough data such that a call to nextPage() will succeed in moving the starting point of the table forward.
protected boolean	hasNextPages(int pages) Returns true if there is enough data to display a given number of additional pages.
protected boolean	hasPage(int index) Returns true if there is enough data such that the specified page is within range.
protected boolean	hasPreviousPage() Returns true if there is enough data such that a call to previousPage() will succeed in moving the starting point of the table backward.
protected boolean	hasPreviousPages(int pages) Returns true if there is enough data to display a given number of previous pages.
boolean	isRangeLimited() Check if the page should be limited to the actual data size.
protected void	lastPage() Go to the last page.
protected void	lastPageStart() Set the page start to the last index that will still show a full page.
protected void	nextPage() Advance the starting row by 'pageSize' rows.
protected abstract void	onRangeOrRowCountChanged() Called when the range or row count changes.
protected void	previousPage() Move the starting row back by 'pageSize' rows.
void	setDisplay(HasRows display) Set the HasRows to be paged.
protected void	setPage(int index) Go to a specific page.
protected void	setPageSize(int pageSize) Set the page size of the display.
protected void	setPageStart(int index) Set the page start index.
void	setRangeLimited(boolean isRangeLimited) Set whether or not the page range should be limited to the actual data size.

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

claimElement, getWidget, initializeClaimedElement, initWidget, isAttached, onAttach, onBrowserEvent, onDetach, render, render, resolvePotentialElement, setWidget

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

addAttachHandler, addBitlessDomHandler, addDomHandler, addHandler, asWidget, asWidgetOrNull, createHandlerManager, delegateEvent, doAttachChildren, doDetachChildren, fireEvent, getHandlerCount, getLayoutData, getParent, isOrWasAttached, onLoad, onUnload, removeFromParent, setLayoutData, sinkEvents, unsinkEvents

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

addStyleDependentName, addStyleName, ensureDebugId, ensureDebugId, ensureDebugId, getAbsoluteLeft, getAbsoluteTop, getElement, getOffsetHeight, getOffsetWidth, getStyleElement, getStyleName, getStyleName, getStylePrimaryName, getStylePrimaryName, getTitle, isVisible, isVisible, onEnsureDebugId, removeStyleDependentName, removeStyleName, setElement, setElement, setHeight, setPixelSize, setSize, setStyleDependentName, setStyleName, setStyleName, setStyleName, setStyleName, setStylePrimaryName, setStylePrimaryName, setTitle, setVisible, setVisible, setWidth, sinkBitlessEvent, toString

Methods inherited from class java.lang.Object

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

Field Detail

rangeChangeHandler

HandlerRegistration rangeChangeHandler

rowCountChangeHandler

HandlerRegistration rowCountChangeHandler

Constructor Detail

AbstractPager

public AbstractPager()

Method Detail

getDisplay

public HasRows getDisplay()

Get the HasRows being paged.

Returns:

the HasRows

See Also:

setDisplay(HasRows)

getPageSize

public int getPageSize()

Get the page size.

Returns:

the page size, or -1 if the display is not set

See Also:

setPageSize(int)

getPageStart

public int getPageStart()

Get the page start index.

Returns:

the page start index, or -1 if the display is not set

See Also:

setPageStart(int)

isRangeLimited

public boolean isRangeLimited()

Check if the page should be limited to the actual data size. Defaults to true.

Returns:

true if the range is limited to the data size

See Also:

setRangeLimited(boolean)

setRangeLimited

public void setRangeLimited(boolean isRangeLimited)

Set whether or not the page range should be limited to the actual data size. If true, all operations will adjust so that there is always data visible on the page.

Parameters:

isRangeLimited - true to limit the range, false not to

See Also:

isRangeLimited()

setDisplay

public void setDisplay(HasRows display)

Set the HasRows to be paged.

Parameters:

display - the HasRows

See Also:

getDisplay()

firstPage

protected void firstPage()

Go to the first page.

getPage

protected int getPage()

Get the current page index.

Since the page start index can be set to any value, its possible to be between pages. In this case, the return value is the number of times previousPage() can be called.

Returns:

the page index, or -1 if the display is not set

See Also:

setPage(int)

getPageCount

protected int getPageCount()

Get the number of pages based on the data size.

Returns:

the page count, or -1 if the display is not set

hasNextPage

protected boolean hasNextPage()

Returns true if there is enough data such that a call to nextPage() will succeed in moving the starting point of the table forward.

Returns:

true if there is a next page

hasNextPages

protected boolean hasNextPages(int pages)

Returns true if there is enough data to display a given number of additional pages.

Parameters:

pages - the number of pages to query

Returns:

true if there are pages next pages

hasPage

protected boolean hasPage(int index)

Returns true if there is enough data such that the specified page is within range.

Parameters:

index - the page index

Returns:

true if the specified page is in range

hasPreviousPage

protected boolean hasPreviousPage()

Returns true if there is enough data such that a call to previousPage() will succeed in moving the starting point of the table backward.

Returns:

true if there is a previous page

hasPreviousPages

protected boolean hasPreviousPages(int pages)

Returns true if there is enough data to display a given number of previous pages.

Parameters:

pages - the number of previous pages to query

Returns:

true if there are pages previous pages

lastPage

protected void lastPage()

Go to the last page.

lastPageStart

protected void lastPageStart()

Set the page start to the last index that will still show a full page.

nextPage

protected void nextPage()

Advance the starting row by 'pageSize' rows.

onRangeOrRowCountChanged

protected abstract void onRangeOrRowCountChanged()

Called when the range or row count changes. Implement this method to update the pager.

previousPage

protected void previousPage()

Move the starting row back by 'pageSize' rows.

setPage

protected void setPage(int index)

Go to a specific page.

Parameters:

index - the page index

See Also:

getPage()

setPageSize

protected void setPageSize(int pageSize)

Set the page size of the display.

Parameters:

pageSize - the new page size

See Also:

getPageSize()

setPageStart

protected void setPageStart(int index)

Set the page start index.

Parameters:

index - the index

See Also:

getPageStart()