Re: Getting the default DateBox() picker to advance year at a time

Thanks , I am using this in my app

On Thursday, June 3, 2010 1:16:03 AM UTC+5:30, Danny Goovaerts wrote:

It's not necessary to write a custom DatePicker. It suffices to create
a DatePicker with a custom MonthSelector.
Here is my implementation
//
package eu.oobikwe.gwt.ui;

import com.google.gwt.user.datepicker.client.CalendarModel;
import com.google.gwt.user.datepicker.client.DatePicker;
import com.google.gwt.user.datepicker.client.DefaultCalendarView;

public class DatePickerWithYearSelector extends DatePicker {

        public DatePickerWithYearSelector() {
                super(new MonthAndYearSelector(),new DefaultCalendarView(),new
CalendarModel()) ;
                MonthAndYearSelector monthSelector = (MonthAndYearSelector)
this.getMonthSelector() ;
                monthSelector.setPicker(this) ;
                monthSelector.setModel(this.getModel()) ;
        }

        public void refreshComponents() {
                super.refreshAll() ;
        }

}

//
package eu.oobikwe.gwt.ui;

import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.ui.Grid;
import com.google.gwt.user.client.ui.PushButton;
import com.google.gwt.user.client.ui.HTMLTable.CellFormatter;
import com.google.gwt.user.datepicker.client.CalendarModel;
import com.google.gwt.user.datepicker.client.MonthSelector;

/**
 * A simple {@link MonthSelector} used for the default date picker.
Not
 * extensible as we wish to evolve it freely over time.
 */

public  class MonthAndYearSelector extends MonthSelector {

  private static String BASE_NAME = "datePicker" ;

  private PushButton backwards;
  private PushButton forwards;
  private PushButton backwardsYear;
  private PushButton forwardsYear;
  private Grid grid;
  private int previousYearColumn = 0;
  private int previousMonthColumn = 1 ;
  private int monthColumn = 2 ;
  private int nextMonthColumn = 3;
  private int nextYearColumn = 4 ;
  private CalendarModel model ;
  private DatePickerWithYearSelector picker ;


public void setModel(CalendarModel model) {
        this.model = model;
}



public void setPicker(DatePickerWithYearSelector picker) {
        this.picker = picker;
}



@Override
  protected void refresh() {
    String formattedMonth = getModel().formatCurrentMonth();
    grid.setText(0, monthColumn, formattedMonth);
  }

  @Override
  protected void setup() {
    // Set up backwards.
    backwards = new PushButton();
    backwards.addClickHandler(new ClickHandler() {
      public void onClick(ClickEvent event) {
        addMonths(-1);
      }
    });

    backwards.getUpFace().setHTML("‹");
    backwards.setStyleName(BASE_NAME + "PreviousButton");

    forwards = new PushButton();
    forwards.getUpFace().setHTML("›");
    forwards.setStyleName(BASE_NAME + "NextButton");
    forwards.addClickHandler(new ClickHandler() {
      public void onClick(ClickEvent event) {
        addMonths(+1);
      }
    });


    // Set up backwards year
    backwardsYear = new PushButton();
    backwardsYear.addClickHandler(new ClickHandler() {
      public void onClick(ClickEvent event) {
        addMonths(-12);
      }
    });

    backwardsYear.getUpFace().setHTML("«");
    backwardsYear.setStyleName(BASE_NAME + "PreviousButton");

    forwardsYear = new PushButton();
    forwardsYear.getUpFace().setHTML("»");
    forwardsYear.setStyleName(BASE_NAME + "NextButton");
    forwardsYear.addClickHandler(new ClickHandler() {
      public void onClick(ClickEvent event) {
        addMonths(+12);
      }
    });

    // Set up grid.
    grid = new Grid(1, 5);
    grid.setWidget(0, previousYearColumn, backwardsYear);
    grid.setWidget(0, previousMonthColumn, backwards);
    grid.setWidget(0, nextMonthColumn, forwards);
    grid.setWidget(0, nextYearColumn, forwardsYear);

    CellFormatter formatter = grid.getCellFormatter();
    formatter.setStyleName(0, monthColumn, BASE_NAME + "Month");
    formatter.setWidth(0, previousYearColumn, "1");
    formatter.setWidth(0, previousMonthColumn, "1");
    formatter.setWidth(0, monthColumn, "100%");
    formatter.setWidth(0, nextMonthColumn, "1");
    formatter.setWidth(0, nextYearColumn, "1");
    grid.setStyleName(BASE_NAME + "MonthSelector");
    initWidget(grid);
  }

  public void addMonths(int numMonths) {
            model.shiftCurrentMonth(numMonths);
            picker.refreshComponents();
          }

}

Danny
On Jun 2, 8:31 pm, Jim Douglas <jdoug...@basis.com> wrote:
> No, it's not possible, short of writing a custom DatePicker.  You
> might want to vote for this open issue:
>
> http://code.google.com/p/google-web-toolkit/issues/detail?id=3520
>
> On Jun 2, 9:24 am, Rob Tanner <caspersg...@gmail.com> wrote:
>
>
>
> > Hi,
>
> > I'm using a DateBox() widget for users to enter their date of birth.
> > When the picker is displayed, on either side of the month/year
> > displayed in the center top of the picker are the greater than and
> > less than arrows for moving forward or backward, month at a time.  I
> > have not figured out anyway to add year at a time as well (25 or more
> > years of moths is a lot of clicks).  Is there anyway to accomplish
> > that?
>
> > Thanks,
> > Rob

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