Java tutorial
// ============================================================================ // // Copyright (C) 2006-2017 Talend Inc. - www.talend.com // // This source code is available under agreement available at // %InstallDIR%\features\org.talend.rcp.branding.%PRODUCTNAME%\%PRODUCTNAME%license.txt // // You should have received a copy of the agreement // along with this program; if not, write to Talend SA // 9 rue Pages 92150 Suresnes, France // // ============================================================================ package com.amalto.workbench.widgets; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.swt.SWT; import org.eclipse.swt.events.KeyEvent; import org.eclipse.swt.events.KeyListener; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.events.VerifyEvent; import org.eclipse.swt.events.VerifyListener; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Text; import com.amalto.workbench.i18n.Messages; import com.amalto.workbench.image.EImage; import com.amalto.workbench.image.ImageCache; public class PageingToolBar { int pagesize = 20; int page = 1; int totalsize; int totalpage; Composite parent; WidgetFactory toolkit = WidgetFactory.getWidgetFactory(); private Label displayItems; private Text pageSizeText; private Button refreshBtn; private Label totalPage; private Button firstPageBtn; private Button prevPageBtn; private Text pageText; private Button nextPageBtn; private Button lastPageBtn; IPagingListener listener; public void setPageingListener(IPagingListener listener) { this.listener = listener; } public PageingToolBar(Composite parent) { this.parent = parent; create(); } public int getStart() { return (page - 1) * pagesize; } public int getLimit() { return pagesize; } public int getTotalsize() { return totalsize; } public void setTotalsize(int totalsize) { this.totalsize = totalsize; totalpage = totalsize % pagesize == 0 ? totalsize / pagesize : totalsize / pagesize + 1; } public void reset() { pagesize = 20; page = 1; totalsize = 0; totalpage = 0; refreshUI(); } public PageingToolBar(Composite parent, int pagesize, int page, int totalsize) { this.parent = parent; this.page = page; this.pagesize = pagesize; this.totalsize = totalsize; totalpage = totalsize % pagesize == 0 ? totalsize / pagesize : totalsize / pagesize + 1; create(); } KeyListener keylistener = new KeyListener() { public void keyReleased(KeyEvent e) { if (e.keyCode == SWT.CR) { doSearchAndRefresh(); } } public void keyPressed(KeyEvent e) { } }; VerifyListener validator = new VerifyListener() { public void verifyText(VerifyEvent e) { String pattern = "[0-9]*"; //$NON-NLS-1$ if (!e.text.matches(pattern)) { e.doit = false; } } }; SelectionListener selListener = new SelectionListener() { public void widgetSelected(SelectionEvent e) { doSearchAndRefresh(); } public void widgetDefaultSelected(SelectionEvent e) { } }; private void doSearchAndRefresh() { if (isPageNumValid()) { page = Integer.valueOf(pageText.getText()); pagesize = Integer.valueOf(pageSizeText.getText()); totalpage = totalsize / pagesize + 1; if (listener != null) { listener.doSearch(); } refreshUI(); } } private boolean isPageNumValid() { page = Integer.valueOf(pageText.getText()); pagesize = Integer.valueOf(pageSizeText.getText()); if (pagesize == 0) { MessageDialog.openWarning(getComposite().getShell(), Messages.Warning, Messages.PageingToolBar_greaterThanZero); return false; } totalpage = totalsize % pagesize == 0 ? totalsize / pagesize : totalsize / pagesize + 1; totalPage.setText(Messages.bind(Messages.PageingToolBar_LabelText, totalpage)); if (totalpage == 0) { return false; } if (page == 0) { MessageDialog.openWarning(getComposite().getShell(), Messages.Warning, Messages.bind(Messages.PageingToolBar_invalidNumber, totalpage)); return false; } boolean valid = (page * pagesize <= totalsize) || ((page - 1) * pagesize < totalsize && page * pagesize > totalsize); if (!valid) { MessageDialog.openWarning(getComposite().getShell(), Messages.Warning, Messages.bind(Messages.PageingToolBar_invalidNumber, totalpage)); } return valid; } private Composite comp; public Composite getComposite() { return comp; } private void create() { comp = toolkit.createComposite(parent); GridLayout layout = new GridLayout(15, false); layout.marginBottom = 0; layout.marginTop = 0; layout.marginHeight = 0; layout.marginWidth = 0; comp.setLayout(layout); // firstpage GridData gd = new GridData(); firstPageBtn = toolkit.createButton(comp, "", SWT.PUSH);//$NON-NLS-1$ firstPageBtn.setToolTipText(Messages.PageingToolBar_FirstPage); firstPageBtn.setImage(ImageCache.getCreatedImage("icons/page-first.gif"));//$NON-NLS-1$ firstPageBtn.setLayoutData(gd); // previous page gd = new GridData(); prevPageBtn = toolkit.createButton(comp, "", SWT.PUSH);//$NON-NLS-1$ prevPageBtn.setToolTipText(Messages.PageingToolBar_PrePage); prevPageBtn.setImage(ImageCache.getCreatedImage("icons/page-prev.gif"));//$NON-NLS-1$ prevPageBtn.setLayoutData(gd); // page // Button btn=toolkit.createButton(comp, "", SWT.SEPARATOR); // gd=new GridData(); // btn.setLayoutData(gd); Label label = toolkit.createLabel(comp, Messages.PageingToolBar_Page, SWT.NULL); gd = new GridData(); label.setLayoutData(gd); pageText = toolkit.createText(comp, "" + page);//$NON-NLS-1$ gd = new GridData(); gd.widthHint = 25; pageText.setLayoutData(gd); pageText.addKeyListener(keylistener); pageText.addVerifyListener(validator); totalPage = toolkit.createLabel(comp, Messages.bind(Messages.PageingToolBar_LabelText, totalpage), SWT.NULL); gd = new GridData(); totalPage.setLayoutData(gd); // Button btn1=toolkit.createButton(comp, "", SWT.SEPARATOR); // gd=new GridData(); // btn1.setLayoutData(gd); // nextpage gd = new GridData(); nextPageBtn = toolkit.createButton(comp, "", SWT.PUSH);//$NON-NLS-1$ nextPageBtn.setToolTipText(Messages.PageingToolBar_NextPage); nextPageBtn.setImage(ImageCache.getCreatedImage("icons/page-next.gif"));//$NON-NLS-1$ nextPageBtn.setLayoutData(gd); // last page gd = new GridData(); lastPageBtn = toolkit.createButton(comp, "", SWT.PUSH);//$NON-NLS-1$ lastPageBtn.setToolTipText(Messages.PageingToolBar_LastPage); lastPageBtn.setImage(ImageCache.getCreatedImage("icons/page-last.gif"));//$NON-NLS-1$ lastPageBtn.setLayoutData(gd); // refresh // Button btn2=toolkit.createButton(comp, "", SWT.SEPARATOR); // gd=new GridData(); // btn2.setLayoutData(gd); refreshBtn = toolkit.createButton(comp, "", SWT.PUSH); //$NON-NLS-1$ gd = new GridData(); refreshBtn.setToolTipText(Messages.PageingToolBar_Refresh); refreshBtn.setLayoutData(gd); refreshBtn.setImage(ImageCache.getCreatedImage(EImage.REFRESH.getPath())); // Button btn3=toolkit.createButton(comp, "", SWT.SEPARATOR); // gd=new GridData(); // btn3.setLayoutData(gd); // page size Label label3 = toolkit.createLabel(comp, Messages.PageingToolBar_LineNumberOfPage, SWT.NULL); gd = new GridData(); label3.setLayoutData(gd); pageSizeText = toolkit.createText(comp, "" + pagesize);//$NON-NLS-1$ gd = new GridData(); gd.widthHint = 25; pageSizeText.setLayoutData(gd); pageSizeText.addKeyListener(keylistener); pageSizeText.addVerifyListener(validator); // display items displayItems = toolkit.createLabel(comp, "");//$NON-NLS-1$ gd = new GridData(SWT.RIGHT, SWT.CENTER, true, true); displayItems.setLayoutData(gd); // add sellistener firstPageBtn.addSelectionListener(new SelectionListener() { public void widgetSelected(SelectionEvent e) { page = 1; if (listener != null) { listener.doSearch(); } refreshUI(); } public void widgetDefaultSelected(SelectionEvent e) { } }); prevPageBtn.addSelectionListener(new SelectionListener() { public void widgetSelected(SelectionEvent e) { page = page - 1 <= 1 ? 1 : page - 1; if (listener != null) { listener.doSearch(); } refreshUI(); } public void widgetDefaultSelected(SelectionEvent e) { } }); nextPageBtn.addSelectionListener(new SelectionListener() { public void widgetSelected(SelectionEvent e) { page = page + 1 >= totalpage ? totalpage : page + 1; if (listener != null) { listener.doSearch(); } refreshUI(); } public void widgetDefaultSelected(SelectionEvent e) { } }); lastPageBtn.addSelectionListener(new SelectionListener() { public void widgetSelected(SelectionEvent e) { page = totalpage; if (listener != null) { listener.doSearch(); } refreshUI(); } public void widgetDefaultSelected(SelectionEvent e) { } }); refreshBtn.addSelectionListener(selListener); } public void refreshUI() { long count = page * pagesize > totalsize ? totalsize : page * pagesize; displayItems.setText(Messages.bind(Messages.PageingToolBar_DisplayText, ((page - 1) * pagesize + 1) + "", //$NON-NLS-1$ "" + count, "" + totalsize));//$NON-NLS-1$//$NON-NLS-2$ pageSizeText.setText("" + pagesize);//$NON-NLS-1$ pageText.setText("" + page);//$NON-NLS-1$ totalPage.setText(Messages.bind(Messages.PageingToolBar_LabelText, totalpage)); if (page <= 1) { firstPageBtn.setImage(ImageCache.getCreatedImage("icons/page-first-disabled.gif"));//$NON-NLS-1$ prevPageBtn.setImage(ImageCache.getCreatedImage("icons/page-prev-disabled.gif"));//$NON-NLS-1$ firstPageBtn.setEnabled(false); prevPageBtn.setEnabled(false); } else { firstPageBtn.setImage(ImageCache.getCreatedImage("icons/page-first.gif"));//$NON-NLS-1$ prevPageBtn.setImage(ImageCache.getCreatedImage("icons/page-prev.gif"));//$NON-NLS-1$ firstPageBtn.setEnabled(true); prevPageBtn.setEnabled(true); } if (page >= totalpage) { nextPageBtn.setImage(ImageCache.getCreatedImage("icons/page-next-disabled.gif"));//$NON-NLS-1$ lastPageBtn.setImage(ImageCache.getCreatedImage("icons/page-last-disabled.gif"));//$NON-NLS-1$ nextPageBtn.setEnabled(false); lastPageBtn.setEnabled(false); } else { nextPageBtn.setImage(ImageCache.getCreatedImage("icons/page-next.gif"));//$NON-NLS-1$ lastPageBtn.setImage(ImageCache.getCreatedImage("icons/page-last.gif"));//$NON-NLS-1$ nextPageBtn.setEnabled(true); lastPageBtn.setEnabled(true); } } }