Subversion Repositories eFlore/Archives.cel-v1

/*

 * Copyright 2006 Google Inc.

 *

 * Licensed under the Apache License, Version 2.0 (the "License"); you may not

 * use this file except in compliance with the License. You may obtain a copy of

 * the License at

 *

 * http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT

 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the

 * License for the specific language governing permissions and limitations under

 * the License.

 */

package org.tela_botanica.client;

import com.google.gwt.http.client.URL;

import com.google.gwt.json.client.JSONArray;

import com.google.gwt.json.client.JSONNumber;

import com.google.gwt.json.client.JSONParser;

import com.google.gwt.json.client.JSONString;

import com.google.gwt.json.client.JSONValue;

import com.google.gwt.user.client.HTTPRequest;

import com.google.gwt.user.client.ResponseTextHandler;

import com.google.gwt.user.client.ui.Button;

import com.google.gwt.user.client.ui.ClickListener;

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

import com.google.gwt.user.client.ui.FlexTable;

import com.google.gwt.user.client.ui.Grid;

import com.google.gwt.user.client.ui.HTML;

import com.google.gwt.user.client.ui.HasHorizontalAlignment;

import com.google.gwt.user.client.ui.HasVerticalAlignment;

import com.google.gwt.user.client.ui.HorizontalPanel;

import com.google.gwt.user.client.ui.SourcesTableEvents;

import com.google.gwt.user.client.ui.TableListener;

import com.google.gwt.user.client.ui.VerticalPanel;

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

/**

 * A tree displaying a set of email folders.

 */

public class StationList extends Composite {

	// Debut Barre de navigation

	private class NavBar extends Composite implements ClickListener {

		public final Button gotoFirst = new Button("<<", this);

		public final Button gotoNext = new Button(">", this);

		public final Button gotoPrev = new Button("<", this);

		public final Button gotoEnd = new Button(">>", this);

		public final HTML status = new HTML();

		public NavBar() {

			HorizontalPanel bar = new HorizontalPanel();

			bar.setStyleName("navbar");

			status.setStyleName("status");

			bar.add(status);

			bar.setCellHorizontalAlignment(status, HasHorizontalAlignment.ALIGN_RIGHT);

			bar.setCellVerticalAlignment(status, HasVerticalAlignment.ALIGN_MIDDLE);

			bar.setCellWidth(status, "100%");

			bar.add(gotoFirst);

			bar.add(gotoPrev);

			bar.add(gotoNext);

			bar.add(gotoEnd);

			initWidget(bar);

		}

		public void onClick(Widget sender) {

			if (sender == gotoNext) {

				// Move forward a page.

				startIndex += VISIBLE_STATION_COUNT;

				if (startIndex >= count)

					startIndex -= VISIBLE_STATION_COUNT;

			} else {

				if (sender == gotoPrev) {

					// Move back a page.

					startIndex -= VISIBLE_STATION_COUNT;

					if (startIndex < 0)

						startIndex = 0;

				} else {

					if (sender == gotoEnd) {

						gotoEnd();

					} else {

						if (sender == gotoFirst) {

							startIndex = 0;

						}

					}

				}

			}

			update();

		}

	}

	// Fin Barre de navigation

		private static final int VISIBLE_STATION_COUNT = 10;

		private static final String VALUE_UNKNOWN = "Inconnues";

		private Grid header = new Grid(1, 2);

		private Grid selector = new Grid(1, 2);

		private FlexTable table = new FlexTable();

		private VerticalPanel outer = new VerticalPanel();

		private VerticalPanel inner = new VerticalPanel();

		private int startIndex = 0;

		private String user;

		private String serviceBaseUrl = null;

		private String location = "all";

		private String station = "all";

		private NavBar navBar=null;

		private int count = 65000;

		// Tous selectionné

		private int  selectedRow = -1;

		private Mediator mediator = null;

		public StationList(Mediator med) {

			mediator=med;

			mediator.registerStationList(this);

			user=mediator.getUser();

			serviceBaseUrl = mediator.getServiceBaseUrl();

			navBar = new NavBar();

			// Mise en forme du header

			header.setCellSpacing(0);

			header.setCellPadding(2);

			header.setWidth("100%");

			header.setStyleName("station-ListHeader");

			header.setWidget(0, 1,navBar);

			selector.setCellSpacing(0);

			selector.setCellPadding(0);

			selector.setWidth("100%");

			selector.setHTML(0, 0, "Toutes");

			selector.getCellFormatter().setWidth(0, 0, "100%");

			 // Hook up events.

			selector.addTableListener(new TableListener () {

				  public void onCellClicked(SourcesTableEvents sender, int row, int cell) {

					  	styleRow(selectedRow, false);

				        selector.getRowFormatter().addStyleName(0, "station-SelectedRow");

					    mediator.onStationSelected("all");

					    station="all";

					  }

		    });

			selector.setStyleName("station-ListElement");

			// Mise en forme du contenu

			table.setCellSpacing(0);

			table.setBorderWidth(0);

			table.setCellPadding(2);

			table.setWidth("100%");

			table.setStyleName("station-ListElement");

			outer.add(header);

			inner.add(selector); // Toutes station

			inner.add(table);

			inner.setStyleName("station-List");

			inner.setWidth("100%");

			outer.setWidth("100%");

			outer.add(inner);

			 // Hook up events.

		    table.addTableListener(new TableListener () {

				  public void onCellClicked(SourcesTableEvents sender, int row, int cell) {

					      selectRow(row);

					      String astation=table.getText(row,cell);

					      if (astation.compareTo(VALUE_UNKNOWN)!=0) {

					    	  station=astation;

					    	  mediator.onStationSelected(astation);

					      }

					      else {

					    	  station="000null";

					    	  mediator.onStationSelected("000null");

					      }

					  }

		    });

		  	styleRow(selectedRow, false);

	        selector.getRowFormatter().addStyleName(0, "station-SelectedRow");

			initWidget(outer);

  }

		/**

		 * Recherche nombre d'enregistrement pour l'utilisateur en cours

		 *

		 *

		 */

		public void updateCount() {

			setStatusDisabled();

			HTTPRequest.asyncGet(serviceBaseUrl + "/InventoryStationList/" + user + "/" + URL.encodeComponent(location) ,

					new ResponseTextHandler() {

						public void onCompletion(String str) {

							JSONValue jsonValue = JSONParser.parse(str);

							JSONNumber jsonNumber;

							if ((jsonNumber = jsonValue.isNumber()) != null) {

								count = (int) jsonNumber.getValue();

								update();

							}

						}

					});

		}

		  private void selectRow(int row) {

		    styleRow(selectedRow, false);

		    styleRow(row, true);

		    selectedRow = row;

		  }

		  private void styleRow(int row, boolean selected) {

			    if (row != -1) {

				   selector.getRowFormatter().removeStyleName(0, "station-SelectedRow");

			      if (selected)

			        table.getRowFormatter().addStyleName(row, "station-SelectedRow");

			      else

			    	if (row < table.getRowCount()) {

			    		table.getRowFormatter().removeStyleName(row, "station-SelectedRow");

			    	}

			    }

			  }

	/**

	 *

	 * Mise a jour de l'affichage, à partir des données d'inventaire deja

	 * saisies. La valeur de this.startIndex permet de determiner quelles

	 * données seront affichées

	 *

	 */

		public void update() {

			setStatusDisabled();

			HTTPRequest.asyncGet(serviceBaseUrl + "/InventoryStationList/" + user + "/" + URL.encodeComponent(location) + "/"

					+ startIndex + "/" + VISIBLE_STATION_COUNT,

			new ResponseTextHandler() {

				public void onCompletion(String str) {

					JSONValue jsonValue = JSONParser.parse(str);

					JSONArray jsonArray;

					JSONArray jsonArrayNested;

					int row=0;

					int i=0;

					if ((jsonArray = jsonValue.isArray()) != null) {

						int arraySize = jsonArray.size();

						for (i = 0; i < arraySize; ++i) {

							if ((jsonArrayNested = jsonArray.get(i).isArray()) != null) {

								if (i>=table.getRowCount()) {

									 row = table.insertRow(table.getRowCount());

								}

								else {

									row = i;

								}

								String astation=((JSONString)jsonArrayNested.get(0)).stringValue();

								if (astation.compareTo("000null")!=0) {

									table.setText(row, 0,astation);

								}

								else {

									table.setText(row, 0,VALUE_UNKNOWN);

								}

								if (astation.compareTo(station)==0) {

								  styleRow(row, true);

								}

								else {

								  styleRow(row, false);

								}

								table.getFlexCellFormatter().setWidth(row, 0, "100%");

							}

						}

					}

					if (station.compareTo("all")==0) {

							selector.getRowFormatter().addStyleName(0, "station-SelectedRow");

					}

					// Suppression fin ancien affichage

					if (i<table.getRowCount()) {

						 for (int j = table.getRowCount() -1 ; j >= i; j--) {

							 table.removeRow(j);

						 }

					}

					setStatusEnabled();

				}

			});

		}

		public void setLocation(String location) {

			this.location = location;

		}

		/*

		 * Positionnement index de parcours (this.startIndex) pour affichage de la

		 * dernière page

		 *

		 * @param

		 * @return void

		 */

		private void gotoEnd() {

			if ((count == 0) || (count % VISIBLE_STATION_COUNT) > 0) {

				startIndex = count - (count % VISIBLE_STATION_COUNT);

			} else {

				startIndex = count - VISIBLE_STATION_COUNT;

			}

		}

		/**

		 * Affichage message d'attente et désactivation navigation

		 *

		 * @param

		 * @return void

		 */

		private void setStatusDisabled() {

			navBar.gotoFirst.setEnabled(false);

			navBar.gotoPrev.setEnabled(false);

			navBar.gotoNext.setEnabled(false);

			navBar.gotoEnd.setEnabled(false);

			navBar.status.setText("Patientez ...");

		}

		/**

		 * Affichage numero de page et gestion de la navigation

		 *

		 */

		private void setStatusEnabled() {

			// Il y a forcemment un disabled avant d'arriver ici

			if (count > 0) {

				if (startIndex >= VISIBLE_STATION_COUNT) { // Au dela de la

															// premiere page

					navBar.gotoPrev.setEnabled(true);

					navBar.gotoFirst.setEnabled(true);

					if (startIndex < (count - VISIBLE_STATION_COUNT)) { // Pas la

																		// derniere

																		// page

						navBar.gotoNext.setEnabled(true);

						navBar.gotoEnd.setEnabled(true);

						navBar.status.setText((startIndex + 1) + " - "

								+ (startIndex + VISIBLE_STATION_COUNT) + " sur " + count );

					} else { // Derniere page

						navBar.status.setText((startIndex + 1) + " - " + count + " sur " + count );

					}

				} else { // Premiere page

					if (count > VISIBLE_STATION_COUNT) { // Des pages derrieres

						navBar.gotoNext.setEnabled(true);

						navBar.gotoEnd.setEnabled(true);

						navBar.status.setText((startIndex + 1) + " - "

								+ (startIndex + VISIBLE_STATION_COUNT) + " sur " + count);

					} else {

						navBar.status.setText((startIndex + 1) + " - " + count + " sur " + count);

					}

				}

			}

			else { // Pas d'inventaire, pas de navigation

				navBar.status.setText("0 - 0 sur 0");

			}

		}

		public void setUser(String user) {

			this.user = user;

		}

		public void setStation(String station) {

			this.station = station;

		}

}