SWT(JFace)体验之List演示汇总

代码如下：

DropDownAndSimple.java

package swt_jface.demo3;import org.eclipse.swt.SWT;import org.eclipse.swt.layout.RowLayout;import org.eclipse.swt.widgets.Combo;import org.eclipse.swt.widgets.Display;import org.eclipse.swt.widgets.Shell;public class DropDownAndSimple { Display display = new Display(); Shell shell = new Shell(display); public DropDownAndSimple() { RowLayout rowLayout = new RowLayout(); rowLayout.spacing = 15; rowLayout.marginWidth = 15; rowLayout.marginHeight = 15; shell.setLayout(rowLayout); Combo comboDropDown = new Combo(shell, SWT.DROP_DOWN | SWT.BORDER); Combo comboSimple = new Combo(shell, SWT.SIMPLE | SWT.BORDER); for(int i=0; i<3; i++) { comboDropDown.add("item " + i); comboSimple.add("item " + i); } shell.pack(); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) { display.sleep(); } } display.dispose(); } public static void main(String[] args) { new DropDownAndSimple(); }}

 

SampleCombo.java

package swt_jface.demo3;import java.util.Arrays;import org.eclipse.swt.SWT;import org.eclipse.swt.events.SelectionEvent;import org.eclipse.swt.events.SelectionListener;import org.eclipse.swt.layout.GridLayout;import org.eclipse.swt.widgets.Combo;import org.eclipse.swt.widgets.Display;import org.eclipse.swt.widgets.Label;import org.eclipse.swt.widgets.Shell;public class SampleCombo { Display display = new Display(); Shell shell = new Shell(display); public SampleCombo() { shell.setLayout(new GridLayout(2, false)); (new Label(shell, SWT.NULL)).setText("Select your favorite programming language: "); //final CCombo combo = new CCombo(shell, SWT.FLAT); final Combo combo = new Combo(shell, SWT.NULL); String[] languages = new String[]{"Java", "C", "C++", "SmallTalk"}; Arrays.sort(languages); for(int i=0; i<languages.length; i++) combo.add(languages[i]); //combo.add("Perl", 5); //combo.setItem(5, "Perl"); combo.addSelectionListener(new SelectionListener() { public void widgetSelected(SelectionEvent e) { System.out.println("Selected index: " + combo.getSelectionIndex() + ", selected item: " + combo.getItem(combo.getSelectionIndex()) + ", text content in the text field: " + combo.getText()); } public void widgetDefaultSelected(SelectionEvent e) { System.out.println("Default selected index: " + combo.getSelectionIndex() + ", selected item: " + (combo.getSelectionIndex() == -1 ? "<null>" : combo.getItem(combo.getSelectionIndex())) + ", text content in the text field: " + combo.getText()); String text = combo.getText(); if(combo.indexOf(text) < 0) { // Not in the list yet. combo.add(text); // Re-sort String[] items = combo.getItems(); Arrays.sort(items); combo.setItems(items); } } }); shell.pack(); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) { display.sleep(); } } display.dispose(); } public static void main(String[] args) { new SampleCombo(); }}

 

SampleList.java

package swt_jface.demo3;import org.eclipse.swt.SWT;import org.eclipse.swt.events.SelectionEvent;import org.eclipse.swt.events.SelectionListener;import org.eclipse.swt.layout.RowLayout;import org.eclipse.swt.widgets.Display;import org.eclipse.swt.widgets.Label;import org.eclipse.swt.widgets.List;import org.eclipse.swt.widgets.Shell;public class SampleList { Display display = new Display(); Shell shell = new Shell(display); public SampleList() { RowLayout rowLayout = new RowLayout(); shell.setLayout(rowLayout); (new Label(shell, SWT.NULL)).setText("What programming languages are you proficient in? "); final List list = new List(shell, SWT.SINGLE | SWT.BORDER | SWT.V_SCROLL); String[] languages = new String[]{"Java", "C", "C++", "SmallTalk"}; for(int i=0; i<languages.length; i++) list.add(languages[i]); list.addSelectionListener(new SelectionListener() { public void widgetSelected(SelectionEvent e) { System.err.println(list.getSelectionIndex()); int[] indices = list.getSelectionIndices(); String[] items = list.getSelection(); StringBuffer sb = new StringBuffer("Selected indices: "); for(int i=0; i < indices.length; i++) { sb.append(indices[i]); sb.append("("); sb.append(items[i]); sb.append(")"); if(i == indices.length-1) sb.append('.'); else sb.append(", "); } System.out.println(sb.toString()); } public void widgetDefaultSelected(SelectionEvent e) { int[] indices = list.getSelectionIndices(); String[] items = list.getSelection(); StringBuffer sb = new StringBuffer("Default selected indices: "); for(int i=0; i < indices.length; i++) { sb.append(indices[i]); sb.append("("); sb.append(items[i]); sb.append(")"); if(i == indices.length-1) sb.append('.'); else sb.append(", "); } System.out.println(sb.toString()); } }); list.selectAll(); //list.select(1); shell.pack(); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) { display.sleep(); } } display.dispose(); } public static void main(String[] args) { new SampleList(); }}

 

SingleMultiLists.java

package swt_jface.demo3;import org.eclipse.swt.SWT;import org.eclipse.swt.layout.GridLayout;import org.eclipse.swt.widgets.Display;import org.eclipse.swt.widgets.Label;import org.eclipse.swt.widgets.List;import org.eclipse.swt.widgets.Shell;public class SingleMultiLists { Display display = new Display(); Shell shell = new Shell(display); public SingleMultiLists() { GridLayout gridLayout = new GridLayout(2, true); shell.setLayout(gridLayout); (new Label(shell, SWT.NULL)).setText("SINGLE"); (new Label(shell, SWT.NULL)).setText("MULTI"); List singleSelectList = new List(shell, SWT.BORDER); List mutliSelectList = new List(shell, SWT.MULTI | SWT.BORDER); String[] items = new String[]{"Item 1", "Item 2", "Item 3", "Item 4"}; for(int i=0; i<items.length; i++) { singleSelectList.add(items[i]); mutliSelectList.add(items[i]); } shell.pack(); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) { display.sleep(); } } display.dispose(); } public static void main(String[] args) { new SingleMultiLists(); }}

 

最后再看一个综合性强一点的：

SampleListViewer.java

package swt_jface.demo3;import java.util.Iterator;import java.util.Vector;import org.eclipse.jface.viewers.ISelectionChangedListener;import org.eclipse.jface.viewers.IStructuredContentProvider;import org.eclipse.jface.viewers.IStructuredSelection;import org.eclipse.jface.viewers.LabelProvider;import org.eclipse.jface.viewers.ListViewer;import org.eclipse.jface.viewers.SelectionChangedEvent;import org.eclipse.jface.viewers.Viewer;import org.eclipse.jface.viewers.ViewerFilter;import org.eclipse.jface.viewers.ViewerSorter;import org.eclipse.swt.SWT;import org.eclipse.swt.events.SelectionAdapter;import org.eclipse.swt.events.SelectionEvent;import org.eclipse.swt.graphics.Image;import org.eclipse.swt.layout.FillLayout;import org.eclipse.swt.layout.RowLayout;import org.eclipse.swt.widgets.Button;import org.eclipse.swt.widgets.Composite;import org.eclipse.swt.widgets.Display;import org.eclipse.swt.widgets.Label;import org.eclipse.swt.widgets.Shell;public class SampleListViewer { Display display = new Display(); Shell shell = new Shell(display); ListViewer listViewer; public static class Language { public String genre; public boolean isObjectOriented; public Language() { } public Language(String genre, boolean isObjectOriented) { this.genre = genre; this.isObjectOriented = isObjectOriented; } public String toString() { return "Lang: " + genre + " [" + (isObjectOriented ? "Object-oriented" : "Procedural") + "]"; } } Vector languages = new Vector(); private void init() { languages.add(new Language("Java", true)); languages.add(new Language("C", false)); languages.add(new Language("C++", true)); languages.add(new Language("SmallTalk", true)); listViewer = new ListViewer(shell); listViewer.setContentProvider(new IStructuredContentProvider() { public Object[] getElements(Object inputElement) { Vector v = (Vector)inputElement; return v.toArray(); } public void dispose() { System.out.println("Disposing ..."); } public void inputChanged( Viewer viewer, Object oldInput, Object newInput) { System.out.println("Input changed: old=" + oldInput + ", new=" + newInput); } }); //listViewer.setContentProvider(new ArrayContentProvider()); listViewer.setInput(languages); listViewer.setLabelProvider(new LabelProvider() { public Image getImage(Object element) { return null; } public String getText(Object element) { return ((Language)element).genre; } }); listViewer.addSelectionChangedListener(new ISelectionChangedListener() { public void selectionChanged(SelectionChangedEvent event) { IStructuredSelection selection = (IStructuredSelection)event.getSelection(); StringBuffer sb = new StringBuffer("Selection - "); sb.append("tatal " + selection.size() + " items selected: "); for(Iterator iterator = selection.iterator(); iterator.hasNext(); ) { sb.append(iterator.next() + ", "); } System.out.println(sb); } }); listViewer.addFilter(new ViewerFilter() { public boolean select( Viewer viewer, Object parentElement, Object element) { if(((Language)element).isObjectOriented) return true; else return false; } }); listViewer.setSorter(new ViewerSorter(){ public int compare(Viewer viewer, Object e1, Object e2) { return ((Language)e1).genre.compareTo(((Language)e2).genre); } });// Object[] toBeSelectedItems = new Object[2];// toBeSelectedItems[0] = languages.elementAt(languages.size()-1);// toBeSelectedItems[1] = languages.elementAt(languages.size()-2);// IStructuredSelection selection = new StructuredSelection(toBeSelectedItems);// // listViewer.setSelection(selection); // Vector v = new Vector();// v.addElement(new Language("VB", true));// // listViewer.setInput(v);// // listViewer.add(new Language("C#", true)); } Button buttonAdd; Button buttonRemove; Button buttonModify; private void addButtons() { Composite composite = new Composite(shell, SWT.NULL); FillLayout fillLayout = new FillLayout(SWT.VERTICAL); fillLayout.spacing = 2; composite.setLayout(fillLayout); buttonAdd = new Button(composite, SWT.PUSH); buttonAdd.setText("Add"); buttonModify = new Button(composite, SWT.PUSH); buttonModify.setText("Modify"); buttonRemove = new Button(composite, SWT.PUSH); buttonRemove.setText("Remove"); buttonAdd.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { String text = OptionPane.showInputDialog(shell, "New language genre: ", "Add new element", null); if(text != null) { languages.add(new Language(text, true)); } listViewer.refresh(false); } }); buttonModify.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { IStructuredSelection selection = (IStructuredSelection)listViewer.getSelection(); Language language = (Language)selection.getFirstElement(); if(language == null) { System.out.println("Please select a language first."); return; } String text = OptionPane.showInputDialog(shell, "Rename: ", "Modify genre", language.genre); if(text != null) { language.genre = text; } listViewer.update(language, null); } }); buttonRemove.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { IStructuredSelection selection = (IStructuredSelection)listViewer.getSelection(); Language language = (Language)selection.getFirstElement(); if(language == null) { System.out.println("Please select a language first."); return; } languages.remove(language); System.out.println("Removed: " + language); listViewer.refresh(false); } }); } public SampleListViewer() { RowLayout rowLayout = new RowLayout(); shell.setLayout(rowLayout); (new Label(shell, SWT.NULL)).setText("What programming languages are you proficient in? "); init(); addButtons(); shell.pack(); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) { display.sleep(); } } display.dispose(); } public static void main(String[] args) { new SampleListViewer(); }}

OptionPane.java

package swt_jface.demo3;import org.eclipse.swt.SWT;import org.eclipse.swt.events.SelectionEvent;import org.eclipse.swt.events.SelectionListener;import org.eclipse.swt.graphics.Point;import org.eclipse.swt.graphics.Rectangle;import org.eclipse.swt.layout.FillLayout;import org.eclipse.swt.layout.GridData;import org.eclipse.swt.layout.GridLayout;import org.eclipse.swt.layout.RowLayout;import org.eclipse.swt.widgets.Button;import org.eclipse.swt.widgets.Composite;import org.eclipse.swt.widgets.Label;import org.eclipse.swt.widgets.Shell;import org.eclipse.swt.widgets.Text;import org.eclipse.swt.widgets.Widget;public class OptionPane { public static String showInputDialog(Shell parent, String message, String title, String initialValue) { final Shell shell = new Shell(parent, SWT.DIALOG_TRIM | SWT.APPLICATION_MODAL | SWT.RESIZE); //shell.setBackground(shell.getDisplay().getSystemColor(SWT.COLOR_WHITE)); if(title != null) shell.setText(title); GridLayout gridLayout = new GridLayout(1, false); shell.setLayout(gridLayout); Composite content = new Composite(shell, SWT.NULL); content.setLayout(new RowLayout()); //content.setBackground(shell.getDisplay().getSystemColor(SWT.COLOR_CYAN)); GridData gridData = new GridData(GridData.FILL_HORIZONTAL); content.setLayoutData(gridData); (new Label(content, SWT.NULL)).setText(message); final Text text = new Text(content, SWT.SINGLE | SWT.BORDER); if(initialValue != null) text.setText(initialValue); Composite buttons =new Composite(shell, SWT.NULL); gridData = new GridData(GridData.HORIZONTAL_ALIGN_CENTER); buttons.setLayoutData(gridData); FillLayout fillLayout = new FillLayout(); fillLayout.spacing = 5; buttons.setLayout(fillLayout); final Button buttonOK = new Button(buttons, SWT.PUSH); final Button buttonCancel = new Button(buttons, SWT.PUSH); buttonOK.setText("OK"); buttonCancel.setText("Cancel"); final class DialogSelectionListener implements SelectionListener { public String returnText; public void widgetSelected(SelectionEvent e) { onSelected(e.widget); } public void widgetDefaultSelected(SelectionEvent e) { onSelected(e.widget); } private void onSelected(Widget widget) { if(widget == buttonOK) returnText = text.getText(); shell.dispose(); } } DialogSelectionListener listener = new DialogSelectionListener(); buttonCancel.addSelectionListener(listener); buttonOK.addSelectionListener(listener); shell.pack(); if(parent != null) { Rectangle parentBounds = parent.getBounds(); Point shellSize = shell.getSize(); shell.setLocation( parentBounds.x+(parentBounds.width-shellSize.x)/2, parentBounds.y+(parentBounds.height-shellSize.y)/2 ); } shell.open(); while (!shell.isDisposed()) { if (!shell.getDisplay().readAndDispatch()) { shell.getDisplay().sleep(); } } return listener.returnText; }}