Examples of com.google.gwt.view.client.Range

com.google.gwt.view.client.Range
The range of interest for a single handler.
Note: This class is new and its interface subject to change.

    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();
  }

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   */
  protected boolean hasNextPages(int pages) {
    if (display == null) {
      return false;
    }
    Range range = display.getVisibleRange();
    return range.getStart() + pages * range.getLength() < display.getRowCount();
  }

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   */
  protected boolean hasPreviousPages(int pages) {
    if (display == null) {
      return false;
    }
    Range range = display.getVisibleRange();
    return (pages - 1) * range.getLength() < range.getStart();
  }

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  /**
   * Advance the starting row by 'pageSize' rows.
   */
  protected void nextPage() {
    if (display != null) {
      Range range = display.getVisibleRange();
      setPageStart(range.getStart() + range.getLength());
    }
  }

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  /**
   * Move the starting row back by 'pageSize' rows.
   */
  protected void previousPage() {
    if (display != null) {
      Range range = display.getVisibleRange();
      setPageStart(range.getStart() - range.getLength());
    }
  }

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   * @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);

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   * @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);
      }
    }
  }

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      // Expected.
    }


    // Render additional data with an exception.
    try {
      presenter.setVisibleRange(new Range(10, 10));
      populatePresenter(presenter);
      presenter.setKeyboardSelectedRow(1, false, false);
      presenter.flush();
      fail("Expected NullPointerException");
    } catch (NullPointerException e) {

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   */
  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)

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    // Page forward by an exact size rather than the number of visible
    // rows as is in the norm in the underlying implementation
    @Override
    public void nextPage() {
        if ( getDisplay() != null ) {
            Range range = getDisplay().getVisibleRange();
            setPageStart( range.getStart()
                          + getPageSize() );
        }
    }

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