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115
...ain/java/org/eclipse/tm4e/languageconfiguration/internal/widgets/AbstractTableWidget.java
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| /** | ||
| * Copyright (c) 2024 Vegard IT GmbH and others. | ||
| * | ||
| * This program and the accompanying materials are made | ||
| * available under the terms of the Eclipse Public License 2.0 | ||
| * which is available at https://www.eclipse.org/legal/epl-2.0/ | ||
| * | ||
| * SPDX-License-Identifier: EPL-2.0 | ||
| * | ||
| * Contributors: | ||
| * - Sebastian Thomschke - initial implementation | ||
| */ | ||
| package org.eclipse.tm4e.languageconfiguration.internal.widgets; | ||
|
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| import java.util.Collections; | ||
| import java.util.List; | ||
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| import org.eclipse.jdt.annotation.Nullable; | ||
| import org.eclipse.jface.layout.TableColumnLayout; | ||
| import org.eclipse.jface.resource.JFaceResources; | ||
| import org.eclipse.jface.viewers.ColumnWeightData; | ||
| import org.eclipse.jface.viewers.IStructuredContentProvider; | ||
| import org.eclipse.jface.viewers.ITableLabelProvider; | ||
| import org.eclipse.jface.viewers.LabelProvider; | ||
| import org.eclipse.jface.viewers.TableViewer; | ||
| import org.eclipse.jface.viewers.Viewer; | ||
| import org.eclipse.swt.SWT; | ||
| import org.eclipse.swt.graphics.GC; | ||
| import org.eclipse.swt.graphics.Image; | ||
| import org.eclipse.swt.layout.GridData; | ||
| import org.eclipse.swt.layout.GridLayout; | ||
| import org.eclipse.swt.widgets.Composite; | ||
| import org.eclipse.swt.widgets.TableColumn; | ||
|
|
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| abstract class AbstractTableWidget<T> extends TableViewer { | ||
|
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| private final class CellLabelProvider extends LabelProvider implements ITableLabelProvider { | ||
| @Override | ||
| public @Nullable Image getColumnImage(final @Nullable Object element, final int columnIndex) { | ||
| return null; | ||
| } | ||
|
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| @Override | ||
| public String getText(final @Nullable Object element) { | ||
| return getColumnText(element, 0); | ||
| } | ||
|
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| @Override | ||
| @SuppressWarnings("unchecked") | ||
| public String getColumnText(@Nullable final Object element, final int columnIndex) { | ||
| return element == null ? "" : AbstractTableWidget.this.getColumnText((T) element, columnIndex); | ||
| } | ||
| } | ||
|
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| private static final class RowContentProvider<T> implements IStructuredContentProvider { | ||
| private List<T> items = Collections.emptyList(); | ||
|
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| @Override | ||
| public void dispose() { | ||
| items = Collections.emptyList(); | ||
| } | ||
|
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| @Override | ||
| public Object[] getElements(final @Nullable Object input) { | ||
| return items.toArray(Object[]::new); | ||
| } | ||
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| @Override | ||
| @SuppressWarnings("unchecked") | ||
| public void inputChanged(final @Nullable Viewer viewer, final @Nullable Object oldInput, final @Nullable Object newInput) { | ||
| items = newInput == null ? Collections.emptyList() : (List<T>) newInput; | ||
| } | ||
| } | ||
|
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| private final TableColumnLayout tableColumnLayout = new TableColumnLayout(); | ||
|
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| protected AbstractTableWidget(Composite parent) { | ||
| this(parent, SWT.BORDER | SWT.FULL_SELECTION | SWT.H_SCROLL | SWT.V_SCROLL); | ||
| } | ||
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| protected AbstractTableWidget(Composite parent, int style) { | ||
| super(new Composite(parent, SWT.NONE), style); | ||
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| setContentProvider(new RowContentProvider<>()); | ||
| setLabelProvider(new CellLabelProvider()); | ||
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| var table = getTable(); | ||
| var container = table.getParent(); | ||
| container.setLayout(new TableColumnLayout()); | ||
| if (parent.getLayout() instanceof GridLayout) { | ||
| container.setLayoutData(new GridData(GridData.FILL_BOTH)); | ||
| } | ||
| table.setHeaderVisible(true); | ||
| table.setLinesVisible(true); | ||
|
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| createColumns(); | ||
| } | ||
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| protected abstract void createColumns(); | ||
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| protected void createColumn(String label, int columnWeight, int minColWidth, boolean resizable) { | ||
| final var col = new TableColumn(getTable(), SWT.NONE); | ||
| col.setText(label); | ||
| final GC gc = new GC(getTable().getShell()); | ||
| try { | ||
| gc.setFont(JFaceResources.getDialogFont()); | ||
| final int labelWidth = gc.stringExtent(label).x + 15; | ||
| tableColumnLayout.setColumnData(col, new ColumnWeightData(columnWeight, Math.max(labelWidth, minColWidth), resizable)); | ||
| } finally { | ||
| gc.dispose(); | ||
| } | ||
| } | ||
|
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| protected abstract String getColumnText(final T element, final int columnIndex); | ||
| } |
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