337 lines
11 KiB
Java
337 lines
11 KiB
Java
package org.gcube.portlets.widgets.ckandatapublisherwidget.client.ui.TwinColumnSelection;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Set;
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import com.github.gwtbootstrap.client.ui.Button;
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import com.github.gwtbootstrap.client.ui.Popover;
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import com.github.gwtbootstrap.client.ui.constants.Placement;
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import com.google.gwt.core.client.GWT;
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import com.google.gwt.dom.client.Style.BorderStyle;
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import com.google.gwt.dom.client.Style.Float;
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import com.google.gwt.dom.client.Style.Unit;
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import com.google.gwt.event.dom.client.ClickEvent;
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import com.google.gwt.event.dom.client.ClickHandler;
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import com.google.gwt.uibinder.client.UiBinder;
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import com.google.gwt.uibinder.client.UiField;
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import com.google.gwt.user.cellview.client.CellList;
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import com.google.gwt.user.cellview.client.HasKeyboardPagingPolicy.KeyboardPagingPolicy;
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import com.google.gwt.user.client.ui.Composite;
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import com.google.gwt.user.client.ui.HTML;
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import com.google.gwt.user.client.ui.VerticalPanel;
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import com.google.gwt.user.client.ui.Widget;
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import com.google.gwt.view.client.ListDataProvider;
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import com.google.gwt.view.client.MultiSelectionModel;
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import com.google.gwt.view.client.SelectionChangeEvent;
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/**
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* The twin column panels for selection of the files to attach to the catalague product.
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* @author Costantino Perciante at ISTI-CNR (costantino.perciante@isti.cnr.it)
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*/
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public class TwinColumnSelectionMainPanel extends Composite{
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@UiField
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VerticalPanel leftContainer;
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@UiField
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VerticalPanel rightContainer;
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@UiField
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VerticalPanel buttonsPanel;
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@UiField
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Button allToRightButton;
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@UiField
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Button toRightButton;
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@UiField
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Button toLeftButton;
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@UiField
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Button allToLeftButton;
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@UiField
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Button goRootButton;
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@UiField
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Popover popoverResourceSelection;
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@UiField
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Button resourceInfoButton;
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private static final String PANEL_BORDER_COLOR = "#08c";
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private static final String PANEL_HEIGHT = "400px";
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private ShowMorePagerPanel showMorePanelLeft = new ShowMorePagerPanel();
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private ShowMorePagerPanel showMorePanelRight = new ShowMorePagerPanel();
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private CellList<ResourceElementBean> cellListLeft;
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private CellList<ResourceElementBean> cellListRight;
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private ListDataProvider<ResourceElementBean> dataProviderLeft = new ListDataProvider<ResourceElementBean>();
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private ListDataProvider<ResourceElementBean> dataProviderRight = new ListDataProvider<ResourceElementBean>();
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private MultiSelectionModel<ResourceElementBean> selectionModelRight;
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private MultiSelectionModel<ResourceElementBean> selectionModelLeft;
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private final List<ResourceElementBean> initialElements;
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private final static HTML aboutHeader = new HTML("<b>Resource Manager</b>");
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private final static HTML aboutBody = new HTML("Move the files you want to attach to the product on the right panel below."
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+ " Please consider that any complex hierarchy structure you may have will be flatten.");
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private static TwinColumnSelectionMainPanelUiBinder uiBinder = GWT
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.create(TwinColumnSelectionMainPanelUiBinder.class);
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interface TwinColumnSelectionMainPanelUiBinder extends
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UiBinder<Widget, TwinColumnSelectionMainPanel> {
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}
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public TwinColumnSelectionMainPanel(List<ResourceElementBean> elements) {
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initWidget(uiBinder.createAndBindUi(this));
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this.initialElements = elements;
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this.buttonsPanel.getElement().getStyle().setMarginTop(50, Unit.PCT);
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goRootButton.getElement().getStyle().setPaddingLeft(0, Unit.PX);
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allToRightButton.getElement().getStyle().setMarginBottom(4, Unit.PX);
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toRightButton.getElement().getStyle().setMarginBottom(4, Unit.PX);
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toLeftButton.getElement().getStyle().setMarginBottom(4, Unit.PX);
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allToLeftButton.getElement().getStyle().setMarginBottom(4, Unit.PX);
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buttonsPanel.getElement().setAttribute("align", "center");
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popoverResourceSelection.setPlacement(Placement.LEFT);
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popoverResourceSelection.setHeading(aboutHeader.getHTML());
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popoverResourceSelection.setText(aboutBody.getHTML());
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resourceInfoButton.getElement().getStyle().setFloat(Float.RIGHT);
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prepareHandlers();
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initLeftSidePanel(elements);
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initRightSidePanel();
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}
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/**
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* Initialize the left side panel
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*/
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private void initLeftSidePanel(List<ResourceElementBean> elements) {
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// initialize the left side list
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ResourceCellLeft cell = new ResourceCellLeft();
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// Set a key provider that provides a unique key for each object.
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cellListLeft = new CellList<ResourceElementBean>(cell, ResourceElementBean.KEY_PROVIDER);
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cellListLeft.setPageSize(elements.size());
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cellListLeft.setKeyboardPagingPolicy(KeyboardPagingPolicy.INCREASE_RANGE);
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// Add a selection model so we can select cells.
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selectionModelLeft = new MultiSelectionModel<ResourceElementBean>(ResourceElementBean.KEY_PROVIDER);
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cellListLeft.setSelectionModel(selectionModelLeft);
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// perform an action on selection
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selectionModelLeft.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
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public void onSelectionChange(SelectionChangeEvent event) {
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Iterator<ResourceElementBean> selectedObjectsIterator = selectionModelLeft.getSelectedSet().iterator();
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while (selectedObjectsIterator.hasNext()) {
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ResourceElementBean selectedBean = (ResourceElementBean) selectedObjectsIterator.next();
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if(selectedBean.isFolder()){
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if(selectionModelLeft.getSelectedSet().size() == 1){
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dataProviderLeft.setList(selectedBean.getChildren());
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dataProviderLeft.refresh();
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dataProviderLeft.flush();
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}
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selectionModelLeft.setSelected(selectedBean, false);
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}
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}
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// enable the buttons that allows to move the objects to the right
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enableMoveToRightButtons(selectionModelLeft.getSelectedSet());
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}
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});
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// set the list into the provider
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dataProviderLeft.setList(elements);
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// set the cell list into the provider
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dataProviderLeft.addDataDisplay(cellListLeft);
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// manage showMorePanelLeft
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showMorePanelLeft.setDisplay(cellListLeft);
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showMorePanelLeft.setHeight(PANEL_HEIGHT);
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showMorePanelLeft.getElement().getStyle().setBorderStyle(BorderStyle.SOLID);
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showMorePanelLeft.getElement().getStyle().setBorderColor(PANEL_BORDER_COLOR);
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// add the list to the leftContainerPanel
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leftContainer.add(showMorePanelLeft);
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}
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/**
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* Initialize the left side panel
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*/
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private void initRightSidePanel() {
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// initialize the left side list
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ResourceCellRight cell = new ResourceCellRight();
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// Set a key provider that provides a unique key for each object.
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cellListRight = new CellList<ResourceElementBean>(cell, ResourceElementBean.KEY_PROVIDER);
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cellListRight.setKeyboardPagingPolicy(KeyboardPagingPolicy.INCREASE_RANGE);
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// Add a selection model so we can select cells.
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selectionModelRight = new MultiSelectionModel<ResourceElementBean>(ResourceElementBean.KEY_PROVIDER);
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cellListRight.setSelectionModel(selectionModelRight);
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// perform an action on selection
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selectionModelRight.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
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public void onSelectionChange(SelectionChangeEvent event) {
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enableMoveToLeftButtons(selectionModelRight.getSelectedSet());
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}
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});
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// set the cell list into the provider
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dataProviderRight.addDataDisplay(cellListRight);
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// manage showMorePanelRight
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showMorePanelRight.setDisplay(cellListRight);
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showMorePanelRight.setHeight(PANEL_HEIGHT);
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showMorePanelRight.getElement().getStyle().setBorderStyle(BorderStyle.SOLID);
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showMorePanelRight.getElement().getStyle().setBorderColor(PANEL_BORDER_COLOR);
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// add the list to the leftContainerPanel
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rightContainer.add(showMorePanelRight);
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}
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/**
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* Enable/disable the buttons to move objects from left to right properly.
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* @param setselectedItemsLeft
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*/
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private void enableMoveToRightButtons(Set<ResourceElementBean> setselectedItemsLeft){
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if(setselectedItemsLeft == null || setselectedItemsLeft.isEmpty()){
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allToRightButton.setEnabled(false);
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toRightButton.setEnabled(false);
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}
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else if(setselectedItemsLeft.size() > 1){
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allToRightButton.setEnabled(true);
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toRightButton.setEnabled(false);
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}
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else{
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allToRightButton.setEnabled(false);
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toRightButton.setEnabled(true);
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}
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}
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/**
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* Enable/disable the buttons to move objects from right to left properly.
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* @param setselectedItemsRight
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*/
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private void enableMoveToLeftButtons(Set<ResourceElementBean> setselectedItemsRight){
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if(setselectedItemsRight == null || setselectedItemsRight.isEmpty()){
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allToLeftButton.setEnabled(false);
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allToLeftButton.setEnabled(false);
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}
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else if(setselectedItemsRight.size() > 1){
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allToLeftButton.setEnabled(true);
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toLeftButton.setEnabled(false);
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}
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else{
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allToLeftButton.setEnabled(false);
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toLeftButton.setEnabled(true);
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}
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}
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/**
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* Prepare the buttons' handlers
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*/
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private void prepareHandlers() {
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goRootButton.addClickHandler(new ClickHandler() {
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@Override
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public void onClick(ClickEvent event) {
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dataProviderLeft.setList(initialElements);
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dataProviderLeft.flush();
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}
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});
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allToRightButton.addClickHandler(new ClickHandler() {
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@Override
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public void onClick(ClickEvent event) {
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moveToRight(selectionModelLeft.getSelectedSet());
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}
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});
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toRightButton.addClickHandler(new ClickHandler() {
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@Override
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public void onClick(ClickEvent event) {
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moveToRight(selectionModelLeft.getSelectedSet());
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}
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});
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allToLeftButton.addClickHandler(new ClickHandler() {
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@Override
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public void onClick(ClickEvent event) {
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moveToLeft(selectionModelRight.getSelectedSet());
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}
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});
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toLeftButton.addClickHandler(new ClickHandler() {
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@Override
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public void onClick(ClickEvent event) {
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moveToLeft(selectionModelRight.getSelectedSet());
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}
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});
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}
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/**
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* Move to right elements
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* @param set the elements to move
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*/
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private void moveToRight(Set<ResourceElementBean> setSelected){
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if(setSelected == null || setSelected.isEmpty())
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return;
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Iterator<ResourceElementBean> iterator = setSelected.iterator();
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while (iterator.hasNext()) {
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ResourceElementBean resourceElementBean = (ResourceElementBean) iterator
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.next();
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resourceElementBean.setMovedToRight(true);
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boolean contains = dataProviderRight.getList().contains(resourceElementBean);
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if(!contains)
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dataProviderRight.getList().add(resourceElementBean);
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}
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// refresh providers
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dataProviderLeft.flush();
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dataProviderRight.flush();
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dataProviderLeft.refresh();
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dataProviderRight.refresh();
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}
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/**
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* Move to left elements
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* @param setSelected the elements to move
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*/
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private void moveToLeft(Set<ResourceElementBean> setSelected){
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if(setSelected == null || setSelected.isEmpty())
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return;
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Iterator<ResourceElementBean> iterator = setSelected.iterator();
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while (iterator.hasNext()) {
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ResourceElementBean resourceElementBean = (ResourceElementBean) iterator.next();
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int index = dataProviderLeft.getList().indexOf(resourceElementBean);
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if(index != -1){
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resourceElementBean.setMovedToRight(false);
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dataProviderLeft.getList().set(index, resourceElementBean); // replace
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}
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}
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// refresh providers
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dataProviderRight.flush();
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dataProviderRight.refresh();
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}
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}
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