java - 将每个列标题的大小调整为最大内容大小 - NatTable

Question

我的列标题有一个 VerticalTextPainter。

我想将列标题高度设置为所有列高度的最大值。

如果我设置 setCalculateByTextHeight(true) 和 setCalculateByTextLength(true)，当我滚动到当前显示的最大值时，它会调整列的大小。相反，我希望它将大小调整为所有列的最大值，并允许用户在之后更改宽度/高度。

是否可以获得所有列标题的最大高度？

更新我尝试删除使用文本高度/长度的计算并添加 InitializeAutoResizeColumnsCommand。这使得列标题高度非常小并且仅显示“...”。

this 是 NatTable。

for (int i = 0; i < getColumnCount(); i++) {
    InitializeAutoResizeColumnsCommand columnCommand = new InitializeAutoResizeColumnsCommand(this, i,
        getConfigRegistry(), new GCFactory(this));
    doCommand(columnCommand);
}

for (int i = 0; i < getRowCount(); i++) {
    InitializeAutoResizeRowsCommand rowCommand = new InitializeAutoResizeRowsCommand(this, i,
        getConfigRegistry(), new GCFactory(this));
    doCommand(rowCommand);
}

完整示例(带有列的复合层)

我为列标题创建了一个带有 VerticalTextPainter 的示例。我添加了一个监听器来在首次绘制表格时调整列的大小。

import org.eclipse.nebula.widgets.nattable.NatTable;
import org.eclipse.nebula.widgets.nattable.config.AbstractRegistryConfiguration;
import org.eclipse.nebula.widgets.nattable.config.CellConfigAttributes;
import org.eclipse.nebula.widgets.nattable.config.ConfigRegistry;
import org.eclipse.nebula.widgets.nattable.config.IConfigRegistry;
import org.eclipse.nebula.widgets.nattable.data.IDataProvider;
import org.eclipse.nebula.widgets.nattable.data.convert.DefaultDisplayConverter;
import org.eclipse.nebula.widgets.nattable.grid.GridRegion;
import org.eclipse.nebula.widgets.nattable.grid.data.DefaultColumnHeaderDataProvider;
import org.eclipse.nebula.widgets.nattable.grid.data.DefaultCornerDataProvider;
import org.eclipse.nebula.widgets.nattable.grid.data.DefaultRowHeaderDataProvider;
import org.eclipse.nebula.widgets.nattable.grid.data.DummyBodyDataProvider;
import org.eclipse.nebula.widgets.nattable.grid.layer.ColumnHeaderLayer;
import org.eclipse.nebula.widgets.nattable.grid.layer.CornerLayer;
import org.eclipse.nebula.widgets.nattable.grid.layer.GridLayer;
import org.eclipse.nebula.widgets.nattable.grid.layer.RowHeaderLayer;
import org.eclipse.nebula.widgets.nattable.hideshow.ColumnHideShowLayer;
import org.eclipse.nebula.widgets.nattable.layer.AbstractLayerTransform;
import org.eclipse.nebula.widgets.nattable.layer.CompositeLayer;
import org.eclipse.nebula.widgets.nattable.layer.DataLayer;
import org.eclipse.nebula.widgets.nattable.layer.LabelStack;
import org.eclipse.nebula.widgets.nattable.layer.cell.IConfigLabelAccumulator;
import org.eclipse.nebula.widgets.nattable.painter.cell.CellPainterWrapper;
import org.eclipse.nebula.widgets.nattable.painter.cell.ICellPainter;
import org.eclipse.nebula.widgets.nattable.painter.cell.TextPainter;
import org.eclipse.nebula.widgets.nattable.painter.cell.VerticalTextPainter;
import org.eclipse.nebula.widgets.nattable.painter.cell.decorator.CustomLineBorderDecorator;
import org.eclipse.nebula.widgets.nattable.painter.cell.decorator.LineBorderDecorator;
import org.eclipse.nebula.widgets.nattable.painter.cell.decorator.PaddingDecorator;
import org.eclipse.nebula.widgets.nattable.reorder.ColumnReorderLayer;
import org.eclipse.nebula.widgets.nattable.resize.MaxCellBoundsHelper;
import org.eclipse.nebula.widgets.nattable.resize.command.MultiRowResizeCommand;
import org.eclipse.nebula.widgets.nattable.selection.SelectionLayer;
import org.eclipse.nebula.widgets.nattable.style.BorderStyle;
import org.eclipse.nebula.widgets.nattable.style.CellStyleAttributes;
import org.eclipse.nebula.widgets.nattable.style.DisplayMode;
import org.eclipse.nebula.widgets.nattable.style.HorizontalAlignmentEnum;
import org.eclipse.nebula.widgets.nattable.style.Style;
import org.eclipse.nebula.widgets.nattable.style.VerticalAlignmentEnum;
import org.eclipse.nebula.widgets.nattable.util.GCFactory;
import org.eclipse.nebula.widgets.nattable.util.GUIHelper;
import org.eclipse.nebula.widgets.nattable.viewport.ViewportLayer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;

public class ExampleNatTable {

    private BodyLayerStack bodyLayer;
    private int statusColumn;
    private int statusRejected;
    private int statusInProgress;
    private boolean check = false;
    private NatTable nattable;
    private String[] summaryProperties;
    private String[] properties;
    private static final String FOO_LABEL = "FOO";
    private static final String CELL_LABEL = "Cell_LABEL";

    public static void main(String[] args) {
        new ExampleNatTable();
    }

    public ExampleNatTable() {

        Display display = new Display();
        Shell shell = new Shell(display);
        shell.setLayout(new FillLayout());

        summaryProperties = new String[3];

        for (int i = 0; i < summaryProperties.length; i++) {

            summaryProperties[i] = "s" + i;
        }

        properties = new String[3];

        for (int i = 0; i < properties.length; i++) {

            properties[i] = "Column" + i;
        }

        // Setting the data layout layer
        GridData gridData = new GridData();
        gridData.heightHint = 1;
        gridData.widthHint = 1;

        IConfigRegistry configRegistry = new ConfigRegistry();

        // Body Data Provider
        IDataProvider dataProvider = new DataProvider(properties.length, 55);
        bodyLayer = new BodyLayerStack(dataProvider);
        // datalayer.addConfiguration(new

        // Column Data Provider
        DefaultColumnHeaderDataProvider columnSummaryData = new DefaultColumnHeaderDataProvider(summaryProperties);
        DefaultColumnHeaderDataProvider columnData = new DefaultColumnHeaderDataProvider(properties);
        ColumnHeaderLayerStack columnSummaryLayer = new ColumnHeaderLayerStack(columnSummaryData);
        ColumnHeaderLayerStack columnlayer = new ColumnHeaderLayerStack(columnData);

        /**
         * Composite layer
         */
        final CompositeLayer columnCompositeLayer = new CompositeLayer(1, 2);
        columnCompositeLayer.setChildLayer("SUMMARY_REGION", columnSummaryLayer, 0, 0);
        columnCompositeLayer.setChildLayer("COLUMNS", columnlayer, 0, 1);

        // Row Data Provider
        DefaultRowHeaderDataProvider rowdata = new DefaultRowHeaderDataProvider(dataProvider);
        RowHeaderLayerStack rowlayer = new RowHeaderLayerStack(rowdata);

        // Corner Data Provider
        DefaultCornerDataProvider cornerdata = new DefaultCornerDataProvider(columnData, rowdata);
        DataLayer cornerDataLayer = new DataLayer(cornerdata);
        CornerLayer cornerLayer = new CornerLayer(cornerDataLayer, rowlayer, columnCompositeLayer);

        GridLayer gridlayer = new GridLayer(bodyLayer, columnCompositeLayer, rowlayer, cornerLayer);
        nattable = new NatTable(shell, gridlayer, false);

        // Change for paint
        IConfigLabelAccumulator cellLabelAccumulator = new IConfigLabelAccumulator() {
            // @Override
            @Override
            public void accumulateConfigLabels(LabelStack configLabels, int columnPosition, int rowPosition) {

                int columnIndex = bodyLayer.getColumnIndexByPosition(columnPosition);
                int rowIndex = bodyLayer.getRowIndexByPosition(rowPosition);
                if (columnIndex == 2 && rowIndex == 45) {
                    configLabels.addLabel(FOO_LABEL);
                } else if ((columnIndex == statusColumn) && (rowIndex == statusRejected) && (check == true)) {
                    configLabels.addLabel(CELL_LABEL);
                }
            }
        };
        bodyLayer.setConfigLabelAccumulator(cellLabelAccumulator);

        // nattable.addConfiguration(new DefaultNatTableStyleConfiguration());
        nattable.addConfiguration(new AbstractRegistryConfiguration() {
            // @Override
            @Override
            public void configureRegistry(IConfigRegistry configRegistry) {

                /**
                 * Column Header
                 */
                final Style columnHeaderStyle = new Style();

                columnHeaderStyle.setAttributeValue(CellStyleAttributes.VERTICAL_ALIGNMENT,
                    VerticalAlignmentEnum.BOTTOM);

                columnHeaderStyle.setAttributeValue(CellStyleAttributes.HORIZONTAL_ALIGNMENT,
                    HorizontalAlignmentEnum.CENTER);

                configRegistry.registerConfigAttribute(CellConfigAttributes.CELL_STYLE, columnHeaderStyle,
                    DisplayMode.NORMAL, GridRegion.COLUMN_HEADER);

                final VerticalTextPainter columnHeaderPainter = new VerticalTextPainter(false, true, false);

                Display display = Display.getCurrent();
                Color blue = display.getSystemColor(SWT.COLOR_BLUE);

                final CellPainterWrapper columnHeaderDecorator = new CustomLineBorderDecorator(
                    new PaddingDecorator(columnHeaderPainter, 3, 0, 3, 0),
                    new BorderStyle(1, blue, BorderStyle.LineStyleEnum.SOLID));

                configRegistry.registerConfigAttribute(CellConfigAttributes.CELL_PAINTER, columnHeaderDecorator,
                    DisplayMode.NORMAL, GridRegion.COLUMN_HEADER);

                /**
                 * Cells
                 */
                final Color bgColor = GUIHelper.COLOR_WHITE;
                final Color fgColor = GUIHelper.COLOR_BLACK;
                final Color gradientBgColor = GUIHelper.COLOR_WHITE;
                final Color gradientFgColor = GUIHelper.getColor(136, 212, 215);
                final Font font = GUIHelper.DEFAULT_FONT;
                final HorizontalAlignmentEnum hAlign = HorizontalAlignmentEnum.CENTER;
                final VerticalAlignmentEnum vAlign = VerticalAlignmentEnum.MIDDLE;
                final BorderStyle borderStyle = null;
                final ICellPainter cellPainter = new LineBorderDecorator(new TextPainter(false, true, 5, true));

                configRegistry.registerConfigAttribute(CellConfigAttributes.CELL_PAINTER, cellPainter);

                Style cellStyle = new Style();
                cellStyle.setAttributeValue(CellStyleAttributes.BACKGROUND_COLOR, bgColor);
                cellStyle.setAttributeValue(CellStyleAttributes.FOREGROUND_COLOR, fgColor);
                cellStyle.setAttributeValue(CellStyleAttributes.GRADIENT_BACKGROUND_COLOR, gradientBgColor);
                cellStyle.setAttributeValue(CellStyleAttributes.GRADIENT_FOREGROUND_COLOR, gradientFgColor);
                cellStyle.setAttributeValue(CellStyleAttributes.FONT, font);
                cellStyle.setAttributeValue(CellStyleAttributes.HORIZONTAL_ALIGNMENT, hAlign);
                cellStyle.setAttributeValue(CellStyleAttributes.VERTICAL_ALIGNMENT, vAlign);
                cellStyle.setAttributeValue(CellStyleAttributes.BORDER_STYLE, borderStyle);

                configRegistry.registerConfigAttribute(CellConfigAttributes.CELL_STYLE, cellStyle);

                configRegistry.registerConfigAttribute(CellConfigAttributes.DISPLAY_CONVERTER,
                    new DefaultDisplayConverter());
            }
        });

        nattable.setLayoutData(gridData);
        nattable.setConfigRegistry(configRegistry);
        nattable.configure();

        nattable.addListener(SWT.Paint, new Listener() {
            boolean resized = false;

            @Override
            public void handleEvent(Event arg0) {
                if (resized) {
                    return;
                }
                resized = true;

                int[] gridRowHeights = MaxCellBoundsHelper.getPreferredRowHeights(nattable.getConfigRegistry(),
                    new GCFactory(nattable), nattable, new int[] {
                        0
                    });

                if (gridRowHeights != null) {
                    nattable.doCommand(new MultiRowResizeCommand(nattable, new int[] {
                        0
                    }, gridRowHeights));
                    nattable.doCommand(new MultiRowResizeCommand(columnlayer, new int[] {
                        0
                    }, gridRowHeights));
                }
            }
        });

        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();

    }

    public class DataProvider extends DummyBodyDataProvider {

        public DataProvider(int columnCount, int rowCount) {
            super(columnCount, rowCount);
        }

        @Override
        public int getColumnCount() {
            return properties.length;
        }

        @Override
        public Object getDataValue(int columnIndex, int rowIndex) {

            return new String("" + columnIndex + ":" + rowIndex);

        }

        @Override
        public int getRowCount() {
            return 55;
        }

        @Override
        public void setDataValue(int arg0, int arg1, Object arg2) {

        }
    }

    public class BodyLayerStack extends AbstractLayerTransform {

        private SelectionLayer selectionLayer;

        public BodyLayerStack(IDataProvider dataProvider) {
            DataLayer bodyDataLayer = new DataLayer(dataProvider);
            ColumnReorderLayer columnReorderLayer = new ColumnReorderLayer(bodyDataLayer);
            ColumnHideShowLayer columnHideShowLayer = new ColumnHideShowLayer(columnReorderLayer);
            this.selectionLayer = new SelectionLayer(columnHideShowLayer);
            ViewportLayer viewportLayer = new ViewportLayer(this.selectionLayer);
            setUnderlyingLayer(viewportLayer);
        }

        public SelectionLayer getSelectionLayer() {
            return this.selectionLayer;
        }
    }

    public class ColumnHeaderLayerStack extends AbstractLayerTransform {

        public ColumnHeaderLayerStack(IDataProvider dataProvider) {
            DataLayer dataLayer = new DataLayer(dataProvider);
            ColumnHeaderLayer colHeaderLayer = new ColumnHeaderLayer(dataLayer, ExampleNatTable.this.bodyLayer,
                ExampleNatTable.this.bodyLayer.getSelectionLayer());
            setUnderlyingLayer(colHeaderLayer);
        }
    }

    public class RowHeaderLayerStack extends AbstractLayerTransform {

        public RowHeaderLayerStack(IDataProvider dataProvider) {
            DataLayer dataLayer = new DataLayer(dataProvider, 50, 20);
            RowHeaderLayer rowHeaderLayer = new RowHeaderLayer(dataLayer, ExampleNatTable.this.bodyLayer,
                ExampleNatTable.this.bodyLayer.getSelectionLayer());
            setUnderlyingLayer(rowHeaderLayer);
        }
    }
}

Answer 1

听起来您需要初始自动调整大小而不是自动大小配置。

查看我们的常见问题解答部分，了解如何触发自动调整大小。那么当然你需要禁用画家计算机制。

https://www.eclipse.org/nattable/documentation.php?page=faq

对于列标题，所描述的机制不起作用，如 InitializeAutoResizeRowsCommandHandler注册于SelectionLayer对于列标题，没有 SelectionLayer .

使用 1.6 API，您只需执行此命令即可自动调整列标题行的大小:

this.nattable.doCommand(new AutoResizeRowsCommand(this.nattable, 0));

使用较旧的 API，您将需要复制实现代码，因为无法避免位置转换，因此无法正常工作:

int[] gridRowHeights = MaxCellBoundsHelper.getPreferredRowHeights(
        this.nattable.getConfigRegistry(),
        new GCFactory(this.nattable),
        this.nattable,
        new int[] { 0 });

if (gridRowHeights != null) {
    this.nattable.doCommand(
        new MultiRowResizeCommand(this.nattable, new int[] { 0 }, gridRowHeights, true));
}

在版本 < 1.6 的组合解决方案中，需要为每一行计算并触发调整大小命令，因为该命令需要传输到堆栈中的最低层。对于上面的示例，它应该如下所示:

int[] gridRowHeights1 = MaxCellBoundsHelper.getPreferredRowHeights(
        ExampleNatTable.this.nattable.getConfigRegistry(),
        new GCFactory(ExampleNatTable.this.nattable),
        ExampleNatTable.this.nattable,
        new int[] { 0 });
int[] gridRowHeights2 = MaxCellBoundsHelper.getPreferredRowHeights(
        ExampleNatTable.this.nattable.getConfigRegistry(),
        new GCFactory(ExampleNatTable.this.nattable),
        ExampleNatTable.this.nattable,
        new int[] { 1 });

if (gridRowHeights1 != null) {
    ExampleNatTable.this.nattable.doCommand(
            new MultiRowResizeCommand(
                    ExampleNatTable.this.nattable,
                    new int[] { 0 },
                    gridRowHeights1));
}
if (gridRowHeights2 != null) {
    ExampleNatTable.this.nattable.doCommand(
            new MultiRowResizeCommand(
                    ExampleNatTable.this.nattable,
                    new int[] { 1 },
                    gridRowHeights2));
}