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  • different result from getRecords() and getTotalRows()

    Hi Isomorphic,

    please see this modified BuiltInDS testcase:

    Code:
    package com.smartgwt.sample.client;
    
    import com.google.gwt.core.client.EntryPoint;
    import com.smartgwt.client.core.KeyIdentifier;
    import com.smartgwt.client.data.DSCallback;
    import com.smartgwt.client.data.DSRequest;
    import com.smartgwt.client.data.DSResponse;
    import com.smartgwt.client.data.DataSource;
    import com.smartgwt.client.data.Record;
    import com.smartgwt.client.types.SelectionStyle;
    import com.smartgwt.client.types.SortArrow;
    import com.smartgwt.client.util.BooleanCallback;
    import com.smartgwt.client.util.Page;
    import com.smartgwt.client.util.PageKeyHandler;
    import com.smartgwt.client.util.SC;
    import com.smartgwt.client.widgets.IButton;
    import com.smartgwt.client.widgets.Label;
    import com.smartgwt.client.widgets.events.ClickEvent;
    import com.smartgwt.client.widgets.events.ClickHandler;
    import com.smartgwt.client.widgets.form.DynamicForm;
    import com.smartgwt.client.widgets.grid.ListGrid;
    import com.smartgwt.client.widgets.grid.ListGridField;
    import com.smartgwt.client.widgets.grid.ListGridRecord;
    import com.smartgwt.client.widgets.grid.events.RecordClickEvent;
    import com.smartgwt.client.widgets.grid.events.RecordClickHandler;
    import com.smartgwt.client.widgets.layout.HLayout;
    import com.smartgwt.client.widgets.layout.VStack;
    import com.smartgwt.client.widgets.viewer.DetailViewer;
    
    /**
     * Entry point classes define <code>onModuleLoad()</code>.
     */
    public class BuiltInDS implements EntryPoint {
        private ListGrid boundList;
        private DynamicForm boundForm;
        private IButton saveBtn;
        private DetailViewer boundViewer;
        private IButton newBtn;
    
        /**
         * This is the entry point method.
         */
        public void onModuleLoad() {
            KeyIdentifier debugKey = new KeyIdentifier();
            debugKey.setCtrlKey(true);
            debugKey.setKeyName("D");
    
            Page.registerKey(debugKey, new PageKeyHandler() {
                public void execute(String keyName) {
                    SC.showConsole();
                }
            });
    
            ListGrid grid = new ListGrid();
            grid.setLeft(20);
            grid.setTop(75);
            grid.setWidth(130);
            grid.setLeaveScrollbarGap(false);
            grid.setShowSortArrow(SortArrow.NONE);
            grid.setCanSort(false);
            grid.setFields(new ListGridField("dsTitle", "Select a DataSource"));
            grid.setData(new ListGridRecord[] { new DSRecord("Animals", "animals"), new DSRecord("Office Supplies", "supplyItem"),
                    new DSRecord("Employees", "employees") });
            grid.setSelectionType(SelectionStyle.SINGLE);
            grid.addRecordClickHandler(new RecordClickHandler() {
                public void onRecordClick(RecordClickEvent event) {
                    DSRecord record = (DSRecord) event.getRecord();
                    bindComponents(record.getDsName());
                }
            });
    
            grid.draw();
    
            VStack vStack = new VStack();
            vStack.setLeft(175);
            vStack.setTop(75);
            vStack.setWidth("70%");
            vStack.setMembersMargin(20);
    
            Label label = new Label();
            label.setContents("<ul>" + "<li>select a datasource from the list at left to bind to these components</li>"
                    + "<li>click a record in the grid to view and edit that record in the form</li>"
                    + "<li>click <b>New</b> to start editing a new record in the form</li>"
                    + "<li>click <b>Save</b> to save changes to a new or edited record in the form</li>"
                    + "<li>click <b>Clear</b> to clear all fields in the form</li>"
                    + "<li>click <b>Filter</b> to filter (substring match) the grid based on form values</li>"
                    + "<li>click <b>Fetch</b> to fetch records (exact match) for the grid based on form values</li>"
                    + "<li>double-click a record in the grid to edit inline (press Return, or arrow/tab to another record, to save)</li>" + "</ul>");
            vStack.addMember(label);
    
            boundList = new ListGrid();
            boundList.setHeight(200);
            boundList.setCanEdit(true);
    
            boundList.addRecordClickHandler(new RecordClickHandler() {
                public void onRecordClick(RecordClickEvent event) {
                    Record record = event.getRecord();
                    boundForm.editRecord(record);
                    saveBtn.enable();
                    boundViewer.viewSelectedData(boundList);
                }
            });
            vStack.addMember(boundList);
    
            boundForm = new DynamicForm();
            boundForm.setNumCols(6);
            boundForm.setAutoFocus(false);
            vStack.addMember(boundForm);
    
            HLayout hLayout = new HLayout(10);
            hLayout.setMembersMargin(10);
            hLayout.setHeight(22);
    
            saveBtn = new IButton("Save");
            saveBtn.addClickHandler(new ClickHandler() {
                public void onClick(ClickEvent event) {
                    boundForm.saveData(new DSCallback() {
                        @Override
                        public void execute(DSResponse dsResponse, Object data, DSRequest dsRequest) {
                            if (dsResponse.getStatus() == DSResponse.STATUS_SUCCESS) {
                                // if the save succeeded, clear the UI
                                boundForm.clearValues();
                                saveBtn.disable();
                            }
                        }
                    });
                }
            });
            hLayout.addMember(saveBtn);
    
            newBtn = new IButton("New");
            newBtn.addClickHandler(new ClickHandler() {
                public void onClick(ClickEvent event) {
                    boundForm.editNewRecord();
                    saveBtn.enable();
                }
            });
            hLayout.addMember(newBtn);
    
            IButton clearBtn = new IButton("Clear");
            clearBtn.addClickHandler(new ClickHandler() {
                public void onClick(ClickEvent event) {
                    boundForm.clearValues();
                    saveBtn.disable();
                }
            });
            hLayout.addMember(clearBtn);
    
            IButton filterBtn = new IButton("Filter");
            filterBtn.addClickHandler(new ClickHandler() {
                public void onClick(ClickEvent event) {
                    boundList.filterData(boundForm.getValuesAsCriteria());
                    saveBtn.disable();
                }
            });
            hLayout.addMember(filterBtn);
    
            IButton deleteBtn = new IButton("DeleteAll");
            deleteBtn.addClickHandler(new DeleteAllButtonClickHandler(boundList));
            hLayout.addMember(deleteBtn);
    
            IButton fetchBtn = new IButton("Fetch");
            fetchBtn.addClickHandler(new ClickHandler() {
                public void onClick(ClickEvent event) {
                    boundList.fetchData(boundForm.getValuesAsCriteria());
                    saveBtn.disable();
                }
            });
            hLayout.addMember(fetchBtn);
    
            vStack.addMember(hLayout);
    
            boundViewer = new DetailViewer();
            vStack.addMember(boundViewer);
    
            vStack.draw();
        }
    
        private void bindComponents(String dsName) {
            DataSource ds = DataSource.get(dsName);
            boundList.setDataSource(ds);
            boundViewer.setDataSource(ds);
            boundForm.setDataSource(ds);
            boundList.fetchData();
            newBtn.enable();
            saveBtn.disable();
        }
    }
    
    class DeleteAllButtonClickHandler implements ClickHandler {
        private ListGrid listGrid;
    
        @Override
        public void onClick(ClickEvent event) {
            final ListGridRecord[] records = listGrid.getRecords();
            int i = listGrid.getTotalRows();
            if (i != 0) {
                if (records.length != 0) {
                    SC.ask("sure?", new BooleanCallback() {
                        @Override
                        public void execute(Boolean value) {
    
                        }
                    });
                }
            }
        }
    
        public DeleteAllButtonClickHandler(ListGrid listGrid) {
            this.listGrid = listGrid;
        }
    }

    Please see the class "DeleteAllButtonClickHandler". Here, the first if-query with "i !=0" passes, but the second if-query with "records.length " fails. To see what I mean, please just load the testcase, select Office Supplies and click then "RemoveAll". Is this a bug?

    If You scroll the whole grid down, so that it has all records, records.length!=0 passes.

    SmartClient Version: v12.0p_2019-01-11/PowerEdition Deployment (built 2019-01-11)

    Thanks in Advance,

    Kind Regards

    Last edited by Developer12145; 14th Jan 2019, 08:28.

  • #2
    Per our javadocs for ListGrid.getRecords(), "If this is a DataBound grid this method will return an empty array unless the entire set of data for the current criteria has been loaded into the client." Contrast with ListGrid.getTotalRows(), which returns the correct total row count if the initial fetch has returned.

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