How to use

isRowCountExact

method

in

com.google.gwt.view.client.HasRows

/**
 * Set the page size of the display.
 *
 * @param pageSize the new page size
 * @see #getPageSize()
 */
protected void setPageSize(int pageSize) {
 if (display != null) {
  Range range = display.getVisibleRange();
  int pageStart = range.getStart();
  if (isRangeLimited && display.isRowCountExact()) {
   pageStart = Math.min(pageStart, display.getRowCount() - pageSize);
  }
  pageStart = Math.max(0, pageStart);
  display.setVisibleRange(pageStart, pageSize);
 }
}

/**
 * Go to a specific page.
 *
 * @param index the page index
 * @see #getPage()
 */
protected void setPage(int index) {
 if (display != null
   && (!isRangeLimited || !display.isRowCountExact() || hasPage(index))) {
  // We don't use the local version of setPageStart because it would
  // constrain the index, but the user probably wants to use absolute page
  // indexes.
  int pageSize = getPageSize();
  display.setVisibleRange(pageSize * index, pageSize);
 }
}

/**
 * Set the page start index.
 *
 * @param index the index
 * @see #getPageStart()
 */
protected void setPageStart(int index) {
 if (display != null) {
  Range range = display.getVisibleRange();
  int pageSize = range.getLength();
  if (isRangeLimited && display.isRowCountExact()) {
   index = Math.min(index, display.getRowCount() - pageSize);
  }
  index = Math.max(0, index);
  if (index != range.getStart()) {
   display.setVisibleRange(index, pageSize);
  }
 }
}

 public void onClick(ClickEvent event) {
  // Display should be non-null, but we check defensively.
  HasRows display = getDisplay();
  if (display != null) {
   Range range = display.getVisibleRange();
   int pageSize = Math.min(range.getLength() + increment,
     display.getRowCount()
       + (display.isRowCountExact() ? 0 : increment));
   display.setVisibleRange(range.getStart(), pageSize);
  }
 }
});

/**
 * Returns true if there is enough data such that a call to
 * {@link #nextPage()} will succeed in moving the starting point of the table
 * forward.
 *
 * @return true if there is a next page
 */
protected boolean hasNextPage() {
 if (display == null || display.getRowCount() == 0) {
  return false;
 } else if (!display.isRowCountExact()) {
  return true;
 }
 Range range = display.getVisibleRange();
 return range.getStart() + range.getLength() < display.getRowCount();
}

/**
 * Get the text to display in the pager that reflects the state of the pager.
 *
 * @return the text
 */
protected String createText() {
 // Default text is 1 based.
 NumberFormat formatter = NumberFormat.getFormat("#,###");
 HasRows display = getDisplay();
 Range range = display.getVisibleRange();
 int pageStart = range.getStart() + 1;
 int pageSize = range.getLength();
 int dataSize = display.getRowCount();
 int endIndex = Math.min(dataSize, pageStart + pageSize - 1);
 endIndex = Math.max(pageStart, endIndex);
 boolean exact = display.isRowCountExact();
 return formatter.format(pageStart) + "-" + formatter.format(endIndex)
   + (exact ? " of " : " of over ") + formatter.format(dataSize);
}

@Override
protected void onRangeOrRowCountChanged() {
 // Assumes a page start index of 0.
 HasRows display = getDisplay();
 int pageSize = display.getVisibleRange().getLength();
 boolean hasLess = pageSize > increment;
 boolean hasMore = !display.isRowCountExact()
   || pageSize < display.getRowCount();
 showLessButton.setVisible(hasLess);
 showMoreButton.setVisible(hasMore);
 layout.setText(0, 1, (hasLess && hasMore) ? " | " : "");
}

@Override
protected void onRangeOrRowCountChanged() {
 HasRows display = getDisplay();
 label.setText(createText());
 // Update the prev and first buttons.
 setPrevPageButtonsDisabled(!hasPreviousPage());
 // Update the next and last buttons.
 if (isRangeLimited() || !display.isRowCountExact()) {
  setNextPageButtonsDisabled(!hasNextPage());
  setFastForwardDisabled(!hasNextPages(getFastForwardPages()));
 }
}

/**
 * Go to a specific page.
 *
 * @param index the page index
 * @see #getPage()
 */
protected void setPage(int index) {
 if (display != null
   && (!isRangeLimited || !display.isRowCountExact() || hasPage(index))) {
  // We don't use the local version of setPageStart because it would
  // constrain the index, but the user probably wants to use absolute page
  // indexes.
  int pageSize = getPageSize();
  display.setVisibleRange(pageSize * index, pageSize);
 }
}

 public void onClick(ClickEvent event) {
  // Display should be non-null, but we check defensively.
  HasRows display = getDisplay();
  if (display != null) {
   Range range = display.getVisibleRange();
   int pageSize = Math.min(range.getLength() + increment,
     display.getRowCount()
       + (display.isRowCountExact() ? 0 : increment));
   display.setVisibleRange(range.getStart(), pageSize);
  }
 }
});

 public void onClick(ClickEvent event) {
  // Display should be non-null, but we check defensively.
  HasRows display = getDisplay();
  if (display != null) {
   Range range = display.getVisibleRange();
   int pageSize = Math.min(range.getLength() + increment,
     display.getRowCount()
       + (display.isRowCountExact() ? 0 : increment));
   display.setVisibleRange(range.getStart(), pageSize);
  }
 }
});

@Override
public void setPageStart(int index) {
  HasRows display = getDisplay();
  if (display != null) {
    Range range = display.getVisibleRange();
    int pageSize = range.getLength();
    if ((!isRangeLimited() || display.getRowCount() <= pageSize) && display.isRowCountExact()) {
      index = Math.min(index, display.getRowCount() - pageSize);
    }
    index = Math.max(0, index);
    if (index != range.getStart()) {
      display.setVisibleRange(index, pageSize);
    }
  }
}

@Override
protected void onRangeOrRowCountChanged() {
 // Assumes a page start index of 0.
 HasRows display = getDisplay();
 int pageSize = display.getVisibleRange().getLength();
 boolean hasLess = pageSize > increment;
 boolean hasMore = !display.isRowCountExact()
   || pageSize < display.getRowCount();
 showLessButton.setVisible(hasLess);
 showMoreButton.setVisible(hasMore);
 layout.setText(0, 1, (hasLess && hasMore) ? " | " : "");
}

@Override
protected void onRangeOrRowCountChanged() {
 // Assumes a page start index of 0.
 HasRows display = getDisplay();
 int pageSize = display.getVisibleRange().getLength();
 boolean hasLess = pageSize > increment;
 boolean hasMore = !display.isRowCountExact()
   || pageSize < display.getRowCount();
 showLessButton.setVisible(hasLess);
 showMoreButton.setVisible(hasMore);
 layout.setText(0, 1, (hasLess && hasMore) ? " | " : "");
}

@Override
protected void onRangeOrRowCountChanged() {
  HasRows display = getDisplay();
  label.setText(createText());
  // Update the prev and first buttons.
  setPrevPageButtonsDisabled(!hasPreviousPage());
  // Update the next and last buttons.
  if (isRangeLimited() || !display.isRowCountExact()) {
    setNextPageButtonsDisabled(!hasNextPage());
    setFastForwardDisabled(!hasNextPages(getFastForwardPages()));
  }
}

@Override
protected void onRangeOrRowCountChanged() {
  HasRows display = getDisplay();
  label.setText(createText());
  // Update the prev and first buttons.
  setPrevPageButtonsDisabled(!hasPreviousPage());
  // Update the next and last buttons.
  if (isRangeLimited() || !display.isRowCountExact()) {
    setNextPageButtonsDisabled(!hasNextPage());
    setFastForwardDisabled(!hasNextPages(getFastForwardPages()));
  }
}

@Override
protected void onRangeOrRowCountChanged() {
  HasRows display = getDisplay();
  label.setText( createText() );
  // Update the prev and first buttons.
  setPrevPageButtonsDisabled( !hasPreviousPage() );
  // Update the next and last buttons.
  if ( isRangeLimited() || !display.isRowCountExact() ) {
    setNextPageButtonsDisabled( !hasNextPage() );
    setFastForwardDisabled( !hasNextPages( getFastForwardPages() ) );
  }
}

@Override
protected void onRangeOrRowCountChanged() {
 HasRows display = getDisplay();
 label.setText(createText());
 // Update the prev and first buttons.
 setPrevPageButtonsDisabled(!hasPreviousPage());
 // Update the next and last buttons.
 if (isRangeLimited() || !display.isRowCountExact()) {
  setNextPageButtonsDisabled(!hasNextPage());
  setFastForwardDisabled(!hasNextPages(getFastForwardPages()));
 }
}

@Override
protected void onRangeOrRowCountChanged() {
  HasRows display = getDisplay();
  label.setText(createText());
  // Update the prev and first buttons.
  setPrevPageButtonsDisabled(!hasPreviousPage());
  // Update the next and last buttons.
  if (isRangeLimited() || !display.isRowCountExact()) {
    setNextPageButtonsDisabled(!hasNextPage());
    setFastForwardDisabled(!hasNextPages(getFastForwardPages()));
  }
}

@Override
protected void onRangeOrRowCountChanged() {
 HasRows display = getDisplay();
 label.setText(createText());
 // Update the prev and first buttons.
 setPrevPageButtonsDisabled(!hasPreviousPage());
 // Update the next and last buttons.
 if (isRangeLimited() || !display.isRowCountExact()) {
  setNextPageButtonsDisabled(!hasNextPage());
  setFastForwardDisabled(!hasNextPages(getFastForwardPages()));
 }
}