--- /dev/null
+/*******************************************************************************
+ * Copyright (c) 2000, 2011 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.jdt.internal.ui.util;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.events.ControlAdapter;
+import org.eclipse.swt.events.ControlEvent;
+import org.eclipse.swt.graphics.Point;
+import org.eclipse.swt.graphics.Rectangle;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Table;
+import org.eclipse.swt.widgets.TableColumn;
+
+import org.eclipse.core.runtime.Assert;
+
+import org.eclipse.jface.viewers.ColumnLayoutData;
+import org.eclipse.jface.viewers.ColumnPixelData;
+import org.eclipse.jface.viewers.ColumnWeightData;
+
+
+/**
+ * A special composite to layout columns inside a table. The composite is needed since we have
+ * to layout the columns "before" the actual table gets layouted. Hence we can't use a normal
+ * layout manager.
+ * <p>
+ * XXX: Should switch to use {@link org.eclipse.jface.layout.TableColumnLayout}.
+ * </p>
+ */
+public class TableLayoutComposite extends Composite {
+
+ /**
+ * The number of extra pixels taken as horizontal trim by the table column.
+ * To ensure there are N pixels available for the content of the column,
+ * assign N+COLUMN_TRIM for the column width.
+ * <p>
+ * XXX: Should either switch to use {@link org.eclipse.jface.layout.TableColumnLayout} or get API from JFace or SWT, see https://bugs.eclipse.org/bugs/show_bug.cgi?id=218483
+ * </p>
+ *
+ * @since 3.1
+ */
+ private static int COLUMN_TRIM;
+ static {
+ String platform= SWT.getPlatform();
+ if ("win32".equals(platform)) //$NON-NLS-1$
+ COLUMN_TRIM= 4;
+ else if ("carbon".equals(platform)) //$NON-NLS-1$
+ COLUMN_TRIM= 24;
+ else
+ COLUMN_TRIM= 3;
+ }
+
+ private List<ColumnLayoutData> columns= new ArrayList<ColumnLayoutData>();
+
+ /**
+ * Creates a new <code>TableLayoutComposite</code>.
+ *
+ * @param parent the parent composite
+ * @param style the SWT style
+ */
+ public TableLayoutComposite(Composite parent, int style) {
+ super(parent, style);
+ addControlListener(new ControlAdapter() {
+ @Override
+ public void controlResized(ControlEvent e) {
+ Rectangle area= getClientArea();
+ Table table= (Table)getChildren()[0];
+ Point preferredSize= computeTableSize(table);
+ int width= area.width - 2 * table.getBorderWidth();
+ if (preferredSize.y > area.height) {
+ // Subtract the scrollbar width from the total column width
+ // if a vertical scrollbar will be required
+ Point vBarSize = table.getVerticalBar().getSize();
+ width -= vBarSize.x;
+ }
+ layoutTable(table, width, area, table.getSize().x < area.width);
+ }
+ });
+ }
+
+ /**
+ * Adds a new column of data to this table layout.
+ *
+ * @param data the column layout data
+ */
+ public void addColumnData(ColumnLayoutData data) {
+ columns.add(data);
+ }
+
+ //---- Helpers -------------------------------------------------------------------------------------
+
+ private Point computeTableSize(Table table) {
+ Point result= table.computeSize(SWT.DEFAULT, SWT.DEFAULT);
+
+ int width= 0;
+ int size= columns.size();
+ for (int i= 0; i < size; ++i) {
+ ColumnLayoutData layoutData= columns.get(i);
+ if (layoutData instanceof ColumnPixelData) {
+ ColumnPixelData col= (ColumnPixelData) layoutData;
+ width += col.width;
+ if (col.addTrim) {
+ width += COLUMN_TRIM;
+ }
+ } else if (layoutData instanceof ColumnWeightData) {
+ ColumnWeightData col= (ColumnWeightData) layoutData;
+ width += col.minimumWidth;
+ } else {
+ Assert.isTrue(false, "Unknown column layout data"); //$NON-NLS-1$
+ }
+ }
+ if (width > result.x)
+ result.x= width;
+ return result;
+ }
+
+ private void layoutTable(Table table, int width, Rectangle area, boolean increase) {
+ // XXX: Layout is being called with an invalid value the first time
+ // it is being called on Linux. This method resets the
+ // Layout to null so we make sure we run it only when
+ // the value is OK.
+ if (width <= 1)
+ return;
+
+ TableColumn[] tableColumns= table.getColumns();
+ int size= Math.min(columns.size(), tableColumns.length);
+ int[] widths= new int[size];
+ int fixedWidth= 0;
+ int numberOfWeightColumns= 0;
+ int totalWeight= 0;
+
+ // First calc space occupied by fixed columns
+ for (int i= 0; i < size; i++) {
+ ColumnLayoutData col= columns.get(i);
+ if (col instanceof ColumnPixelData) {
+ ColumnPixelData cpd= (ColumnPixelData) col;
+ int pixels= cpd.width;
+ if (cpd.addTrim) {
+ pixels += COLUMN_TRIM;
+ }
+ widths[i]= pixels;
+ fixedWidth += pixels;
+ } else if (col instanceof ColumnWeightData) {
+ ColumnWeightData cw= (ColumnWeightData) col;
+ numberOfWeightColumns++;
+ // first time, use the weight specified by the column data, otherwise use the actual width as the weight
+ // int weight = firstTime ? cw.weight : tableColumns[i].getWidth();
+ int weight= cw.weight;
+ totalWeight += weight;
+ } else {
+ Assert.isTrue(false, "Unknown column layout data"); //$NON-NLS-1$
+ }
+ }
+
+ // Do we have columns that have a weight
+ if (numberOfWeightColumns > 0) {
+ // Now distribute the rest to the columns with weight.
+ int rest= width - fixedWidth;
+ int totalDistributed= 0;
+ for (int i= 0; i < size; ++i) {
+ ColumnLayoutData col= columns.get(i);
+ if (col instanceof ColumnWeightData) {
+ ColumnWeightData cw= (ColumnWeightData) col;
+ // calculate weight as above
+ // int weight = firstTime ? cw.weight : tableColumns[i].getWidth();
+ int weight= cw.weight;
+ int pixels= totalWeight == 0 ? 0 : weight * rest / totalWeight;
+ if (pixels < cw.minimumWidth)
+ pixels= cw.minimumWidth;
+ totalDistributed += pixels;
+ widths[i]= pixels;
+ }
+ }
+
+ // Distribute any remaining pixels to columns with weight.
+ int diff= rest - totalDistributed;
+ for (int i= 0; diff > 0; ++i) {
+ if (i == size)
+ i= 0;
+ ColumnLayoutData col= columns.get(i);
+ if (col instanceof ColumnWeightData) {
+ ++widths[i];
+ --diff;
+ }
+ }
+ }
+
+ if (increase) {
+ table.setSize(area.width, area.height);
+ }
+ for (int i= 0; i < size; i++) {
+ tableColumns[i].setWidth(widths[i]);
+ }
+ if (!increase) {
+ table.setSize(area.width, area.height);
+ }
+ }
+}
git://git.uio.no / ifi-stolz-refaktor.git / blobdiff