Java tutorial
/******************************************************************************* * Copyright (c) 2004, 2007 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.debug.internal.ui.views.memory.renderings; import org.eclipse.debug.core.DebugException; import org.eclipse.debug.core.model.IMemoryBlock; import org.eclipse.debug.core.model.IMemoryBlockExtension; import org.eclipse.debug.internal.ui.DebugPluginImages; import org.eclipse.debug.internal.ui.DebugUIMessages; import org.eclipse.debug.internal.ui.DebugUIPlugin; import org.eclipse.debug.internal.ui.IInternalDebugUIConstants; import org.eclipse.debug.ui.IDebugUIConstants; import org.eclipse.jface.action.Action; import org.eclipse.jface.viewers.ITableLabelProvider; import org.eclipse.jface.viewers.StructuredViewer; import org.eclipse.swt.graphics.GC; import org.eclipse.swt.printing.PrintDialog; import org.eclipse.swt.printing.Printer; import org.eclipse.swt.printing.PrinterData; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.swt.widgets.TableItem; import org.eclipse.ui.PlatformUI; /** * Print view tab toolbar action * * @since 3.0 */ public class PrintTableRenderingAction extends Action { private AbstractBaseTableRendering fRendering; private StructuredViewer fViewer; private static final String COLUMN_SEPERATOR = " "; //$NON-NLS-1$ public PrintTableRenderingAction(AbstractBaseTableRendering rendering, StructuredViewer viewer) { super(DebugUIMessages.PrintViewTabAction_title); fRendering = rendering; fViewer = viewer; setToolTipText(DebugUIMessages.PrintViewTabAction_tooltip); setImageDescriptor( DebugPluginImages.getImageDescriptor(IInternalDebugUIConstants.IMG_ELCL_PRINT_TOP_VIEW_TAB)); setHoverImageDescriptor( DebugPluginImages.getImageDescriptor(IInternalDebugUIConstants.IMG_LCL_PRINT_TOP_VIEW_TAB)); setDisabledImageDescriptor( DebugPluginImages.getImageDescriptor(IInternalDebugUIConstants.IMG_DLCL_PRINT_TOP_VIEW_TAB)); PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IDebugUIConstants.PLUGIN_ID + ".PrintViewTabContextAction_context"); //$NON-NLS-1$ } /* * draws a Table to a GC which has been initialized with a Printer. * startJob() and startPage() must be called before printTable(...), * and endPage() and endJob() must be called after printTable(...). */ protected void printTable(TableItem[] itemList, GC printGC, Printer printer) { int numColumns = ((Table) fViewer.getControl()).getColumnCount(); ITableLabelProvider labelProvider = (ITableLabelProvider) fViewer.getLabelProvider(); int lineNum = 1; int charsPerByte = fRendering.getNumCharsPerByte(); if (charsPerByte < 0) charsPerByte = 4; // return line number after column labels are printed lineNum = printColumnLabels(printGC, lineNum); //for all items in the table for (int i = 0; i < itemList.length; i++) { StringBuffer tableContents = new StringBuffer(); //print all columns for this row for (int j = 0; j < numColumns; j++) { String columnText = labelProvider.getColumnText(itemList[i].getData(), j); while (columnText.length() < fRendering.getBytesPerColumn() * charsPerByte) { columnText += " "; //$NON-NLS-1$ } tableContents.append(COLUMN_SEPERATOR); tableContents.append(columnText); } printGC.drawString(tableContents.toString(), 10, 10 + (lineNum * printGC.getFontMetrics().getHeight())); lineNum++; // if we've run over the end of a page, start a new one if (20 + lineNum * printGC.getFontMetrics().getHeight() > printer.getClientArea().height) { lineNum = 1; printer.endPage(); printer.startPage(); lineNum = printColumnLabels(printGC, lineNum); } } } private int printColumnLabels(GC printGC, int lineNum) { StringBuffer tableContents = new StringBuffer(); int numColumns = ((Table) fViewer.getControl()).getColumnCount(); TableColumn columns[] = ((Table) fViewer.getControl()).getColumns(); int charsPerByte = fRendering.getNumCharsPerByte(); if (charsPerByte < 0) charsPerByte = 4; int addressSizeInBytes = 0; TableRenderingContentDescriptor descriptor = (TableRenderingContentDescriptor) fRendering .getAdapter(TableRenderingContentDescriptor.class); if (descriptor == null) { // special for address column IMemoryBlock memBlock = fRendering.getMemoryBlock(); if (memBlock instanceof IMemoryBlockExtension) { try { addressSizeInBytes = ((IMemoryBlockExtension) memBlock).getAddressSize(); } catch (DebugException e) { addressSizeInBytes = 0; } if (addressSizeInBytes <= 0) addressSizeInBytes = 4; } else { addressSizeInBytes = 4; } } else { addressSizeInBytes = descriptor.getAddressSize(); } //get the column headers for (int k = 0; k < numColumns; k++) { StringBuffer columnLabel = new StringBuffer(columns[k].getText()); int numBytes = 0; if (k > 0) { numBytes = fRendering.getBytesPerColumn(); } else { numBytes = addressSizeInBytes; } while (columnLabel.length() < numBytes * charsPerByte) { columnLabel.append(" "); //$NON-NLS-1$ } tableContents.append(COLUMN_SEPERATOR); tableContents.append(columnLabel); } printGC.drawString(tableContents.toString(), 10, 10 + (lineNum * printGC.getFontMetrics().getHeight())); lineNum++; return lineNum; } /* (non-Javadoc) * @see org.eclipse.jface.action.IAction#run() */ public void run() { if (!(fViewer.getControl() instanceof Table)) return; PrintDialog printDialog = new PrintDialog(DebugUIPlugin.getShell()); PrinterData printerData = printDialog.open(); // pop up a system print dialog if (printerData == null) { setChecked(false); return; } Printer printer = new Printer(printerData); GC gc = new GC(printer); TableItem[] tableItems = ((Table) fViewer.getControl()).getItems(); // start the print job and assign it a title printer.startJob(DebugUIMessages.PrintViewTabAction_jobtitle + fRendering.getLabel()); printer.startPage(); // start the first page printTable(tableItems, gc, printer); // print all rows of the table printer.endPage(); // end the last page printer.endJob(); // end the print job gc.dispose(); printer.dispose(); setChecked(false); } }