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Viewing changes to TuxGuitar/src/org/herac/tuxguitar/gui/printer/PrintPreview.java

  • Committer: Bazaar Package Importer
  • Author(s): Philippe Coval
  • Date: 2008-06-19 00:30:30 UTC
  • mto: (5.1.2 sid)
  • mto: This revision was merged to the branch mainline in revision 3.
  • Revision ID: james.westby@ubuntu.com-20080619003030-h719szrhsngou7c6
Tags: upstream-1.0
Import upstream version 1.0

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TuxGuitar/src/org/herac/tuxguitar/gui/printer/PrintPreview.java
 
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package org.herac.tuxguitar.gui.printer;
 
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import java.util.List;
 
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import org.eclipse.swt.SWT;
 
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import org.eclipse.swt.events.KeyAdapter;
 
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import org.eclipse.swt.events.KeyEvent;
 
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import org.eclipse.swt.events.PaintEvent;
 
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import org.eclipse.swt.events.PaintListener;
 
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import org.eclipse.swt.events.SelectionAdapter;
 
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import org.eclipse.swt.events.SelectionEvent;
 
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import org.eclipse.swt.graphics.Image;
 
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import org.eclipse.swt.graphics.Rectangle;
 
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import org.eclipse.swt.layout.GridData;
 
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import org.eclipse.swt.layout.GridLayout;
 
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import org.eclipse.swt.widgets.Button;
 
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import org.eclipse.swt.widgets.Composite;
 
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import org.eclipse.swt.widgets.Event;
 
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import org.eclipse.swt.widgets.Label;
 
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import org.eclipse.swt.widgets.Listener;
 
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import org.eclipse.swt.widgets.ScrollBar;
 
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import org.eclipse.swt.widgets.Shell;
 
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import org.eclipse.swt.widgets.Text;
 
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import org.herac.tuxguitar.gui.TuxGuitar;
 
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import org.herac.tuxguitar.gui.editors.TGPainter;
 
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import org.herac.tuxguitar.gui.system.keybindings.KeyBindingConstants;
 
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import org.herac.tuxguitar.gui.util.DialogUtils;
 
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public class PrintPreview{
 
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        private static final int SCROLL_INCREMENT = 50;
 
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        private static final int MARGIN_TOP = 20;
 
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        private static final int MARGIN_BOTTOM = 40;
 
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        private static final int MARGIN_LEFT = 50;
 
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        private static final int MARGIN_RIGHT = 20;
 
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        protected Shell dialog;
 
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        protected Composite previewComposite;
 
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        protected Composite pageComposite;
 
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        protected Text currentText;
 
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        protected Button previous;
 
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        protected Button next;
 
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        protected Rectangle bounds;
 
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        protected List pages;
 
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        protected int currentPage;
 
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        public PrintPreview(List pages,Rectangle bounds){
 
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                this.pages = pages;
 
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                this.bounds = bounds;
 
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        }
 
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        public void showPreview(Shell parent){
 
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                this.dialog = DialogUtils.newDialog(parent,SWT.SHELL_TRIM | SWT.APPLICATION_MODAL );
 
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                this.dialog.setLayout(new GridLayout());
 
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                this.dialog.setText(TuxGuitar.getProperty("print.preview"));
 
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                this.initToolBar();
 
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                this.initPreviewComposite();
 
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                this.changePage(0);
 
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                DialogUtils.openDialog(this.dialog, DialogUtils.OPEN_STYLE_MAXIMIZED | DialogUtils.OPEN_STYLE_WAIT);
 
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        }
 
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        private void initToolBar(){
 
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                Composite composite = new Composite(this.dialog,SWT.NONE);
 
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                composite.setLayout(new GridLayout(5,false));
 
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                composite.setLayoutData(new GridData(SWT.FILL,SWT.FILL,true,false));
 
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                this.previous = new Button(composite,SWT.ARROW | SWT.LEFT);
 
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                this.currentText = new Text(composite,SWT.BORDER);
 
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                this.currentText.setLayoutData(new GridData(25,SWT.DEFAULT));
 
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                this.next = new Button(composite,SWT.ARROW | SWT.RIGHT);
 
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                Label maxPages = new Label(composite,SWT.NONE);
 
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                Button close = new Button(composite,SWT.PUSH);
 
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                close.setLayoutData(getButtonData());
 
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                this.currentText.addKeyListener(new KeyAdapter() {
 
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                        public void keyReleased(KeyEvent e) {
 
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                                if(e.keyCode == KeyBindingConstants.ENTER){
 
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                                        try{
 
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                                                Integer number = new Integer(PrintPreview.this.currentText.getText());
 
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                                                changePage(number.intValue() - 1);
 
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                                        }catch(NumberFormatException exception){
 
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                                                changePage(PrintPreview.this.currentPage);
 
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                                        }
 
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                                }
 
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                        }
 
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                });
 
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                this.previous.addSelectionListener(new SelectionAdapter() {
 
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                        public void widgetSelected(SelectionEvent e) {
 
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                                if(PrintPreview.this.currentPage >= 0){
 
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                                        changePage(PrintPreview.this.currentPage - 1);
 
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                                }
 
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                        }
 
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                });
 
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                this.next.addSelectionListener(new SelectionAdapter() {
 
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                        public void widgetSelected(SelectionEvent e) {
 
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                                if(PrintPreview.this.currentPage >= 0){
 
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                                        changePage(PrintPreview.this.currentPage + 1);
 
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                                }
 
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                        }
 
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                });
 
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                close.addSelectionListener(new SelectionAdapter() {
 
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                        public void widgetSelected(SelectionEvent e) {
 
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                                PrintPreview.this.dialog.dispose();
 
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                        }
 
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                });
 
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                maxPages.setText(TuxGuitar.getProperty("print.preview.page-of") + " " + this.pages.size());
 
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                close.setText(TuxGuitar.getProperty("close"));
 
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        }
 
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        private GridData getButtonData(){
 
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                GridData data = new GridData(SWT.RIGHT, SWT.FILL, true, true);
 
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                data.minimumWidth = 80;
 
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                data.minimumHeight = 25;
 
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                return data;
 
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        }
 
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        private void initPreviewComposite(){
 
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                this.previewComposite = new Composite(this.dialog,SWT.BORDER | SWT.V_SCROLL);
 
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                this.previewComposite.setLayout(new GridLayout());
 
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                this.previewComposite.setLayoutData(new GridData(SWT.FILL,SWT.FILL,true,true));
 
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                this.previewComposite.setBackground(this.previewComposite.getDisplay().getSystemColor(SWT.COLOR_GRAY));
 
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                this.previewComposite.setFocus();
 
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                this.pageComposite = new Composite(this.previewComposite,SWT.BORDER | SWT.DOUBLE_BUFFERED);
 
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                this.pageComposite.setLayout(new GridLayout());
 
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                this.pageComposite.setBackground(this.previewComposite.getDisplay().getSystemColor(SWT.COLOR_WHITE));
 
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                this.pageComposite.addPaintListener(new PaintListener() {
 
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                        public void paintControl(PaintEvent e) {
 
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                                if(PrintPreview.this.currentPage >= 0){
 
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                                        updateScroll();
 
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                                        int vScroll = PrintPreview.this.previewComposite.getVerticalBar().getSelection();
 
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                                        TGPainter painter = new TGPainter(e.gc);
 
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                                        painter.drawImage((Image)PrintPreview.this.pages.get(PrintPreview.this.currentPage),MARGIN_LEFT,MARGIN_TOP - vScroll);
 
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                                }
 
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                        }
 
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                });
 
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                GridData pageData = new GridData();
 
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                pageData.horizontalAlignment = SWT.CENTER;
 
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                pageData.verticalAlignment = SWT.CENTER;
 
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                pageData.grabExcessHorizontalSpace = true;
 
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                pageData.grabExcessVerticalSpace = true;
 
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                pageData.widthHint = (this.bounds.width - this.bounds.x) + (MARGIN_LEFT + MARGIN_RIGHT);
 
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                pageData.heightHint = (this.bounds.height - this.bounds.y) + (MARGIN_TOP + MARGIN_BOTTOM);
 
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                this.pageComposite.setLayoutData(pageData);
 
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                this.previewComposite.getVerticalBar().setIncrement(SCROLL_INCREMENT);
 
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                this.previewComposite.getVerticalBar().addListener(SWT.Selection, new Listener() {
 
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                        public void handleEvent(Event e) {
 
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                                PrintPreview.this.pageComposite.redraw();
 
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                        }
 
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                });
 
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        }
 
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        protected void updateScroll(){
 
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                ScrollBar vBar = this.previewComposite.getVerticalBar();
 
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                Rectangle client = this.pageComposite.getClientArea();
 
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                vBar.setMaximum((this.bounds.height - this.bounds.y) + (MARGIN_TOP + MARGIN_BOTTOM));
 
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                vBar.setThumb(Math.min((this.bounds.height - this.bounds.y) + (MARGIN_TOP + MARGIN_BOTTOM), client.height));
 
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        }
 
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        protected void changePage(int index){
 
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                if(!this.pages.isEmpty()){
 
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                        int pageCount = this.pages.size();
 
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                        if(index >= 0 && index < pageCount){
 
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                                this.currentPage = index;
 
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                                this.currentText.setText(Integer.toString(index + 1));
 
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                                this.pageComposite.redraw();
 
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                        }else if(this.currentPage >= 0 && this.currentPage < pageCount){
 
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                                this.currentText.setText(Integer.toString(this.currentPage + 1 ));
 
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                        }
 
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                        this.previous.setEnabled(this.currentPage > 0);
 
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                        this.next.setEnabled((this.currentPage + 1) < pageCount);
 
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                        this.previewComposite.getVerticalBar().setSelection(0);
 
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                        this.previewComposite.setFocus();
 
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                }else{
 
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                        this.currentText.setEnabled(false);
 
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                        this.previous.setEnabled(false);
 
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                        this.next.setEnabled(false);
 
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                }
 
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        }
 
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}