SWT(JFace)体验之DRAW2D包

jar包一览如下：

 

org.eclipse.jface_3.4.2.M20090107-0800.jar
org.eclipse.swt.win32.win32.x86_3.4.1.v3452b.jar
org.eclipse.core.commands_3.4.0.I20080509-2000.jar
org.eclipse.core.runtime_3.4.0.v20080512.jar
org.eclipse.equinox.common_3.4.0.v20080421-2006.jar
org.eclipse.osgi_3.4.3.R34x_v20081215-1030.jar
commons-net-ftp-2.0.jar
org.eclipse.ui.forms_3.3.103.v20081027_34x.jar
com.ibm.icu_3.8.1.v20080530.jar
org.eclipse.draw2d_3.4.2.v20090114-1330.jar

 

测试代码:

Draw2DSample.java

package swt_jface.demo15;import org.eclipse.draw2d.Button;import org.eclipse.draw2d.LightweightSystem;import org.eclipse.jface.window.ApplicationWindow;import org.eclipse.swt.SWT;import org.eclipse.swt.graphics.Image;import org.eclipse.swt.layout.FillLayout;import org.eclipse.swt.widgets.Canvas;import org.eclipse.swt.widgets.Composite;import org.eclipse.swt.widgets.Control;import org.eclipse.swt.widgets.Shell;public class Draw2DSample extends ApplicationWindow {protected void addToolBar(int style) {super.addToolBar(style);}protected Control createContents(Composite parent) {Composite composite = new Composite(parent, SWT.NULL);composite.setLayout(new FillLayout());Canvas canvas = new Canvas(composite, SWT.NULL);LightweightSystem lws = new LightweightSystem(canvas);Button button = new Button("Button", new Image(getShell().getDisplay(), "C:/icons/eclipse0.gif"));lws.setContents(button);return composite;}public Draw2DSample(Shell parentShell) {super(parentShell);}public static void main(String[] args) {Draw2DSample window = new Draw2DSample(null);window.setBlockOnOpen(true);window.open();}}

 

再来看个复杂的示例：

ClassAnalyzer.java

package swt_jface.demo15;import java.lang.reflect.Field;import java.lang.reflect.Method;import java.lang.reflect.Modifier;import org.eclipse.draw2d.AbstractBorder;import org.eclipse.draw2d.ChopboxAnchor;import org.eclipse.draw2d.ColorConstants;import org.eclipse.draw2d.Figure;import org.eclipse.draw2d.Graphics;import org.eclipse.draw2d.IFigure;import org.eclipse.draw2d.Label;import org.eclipse.draw2d.LightweightSystem;import org.eclipse.draw2d.LineBorder;import org.eclipse.draw2d.MouseListener;import org.eclipse.draw2d.PolygonDecoration;import org.eclipse.draw2d.PolylineConnection;import org.eclipse.draw2d.ToolbarLayout;import org.eclipse.draw2d.XYLayout;import org.eclipse.draw2d.geometry.Insets;import org.eclipse.draw2d.geometry.PointList;import org.eclipse.draw2d.geometry.Rectangle;import org.eclipse.jface.action.Action;import org.eclipse.jface.dialogs.Dialog;import org.eclipse.jface.dialogs.InputDialog;import org.eclipse.jface.resource.ImageDescriptor;import org.eclipse.jface.resource.ImageRegistry;import org.eclipse.jface.window.ApplicationWindow;import org.eclipse.swt.SWT;import org.eclipse.swt.graphics.Image;import org.eclipse.swt.layout.FillLayout;import org.eclipse.swt.widgets.Canvas;import org.eclipse.swt.widgets.Composite;import org.eclipse.swt.widgets.Control;import org.eclipse.swt.widgets.Display;import org.eclipse.swt.widgets.Shell;import org.eclipse.swt.widgets.Text;class ClassFigure extends Figure {ImageRegistry registry = new ImageRegistry();String KEY_CLASS = "class";String KEY_METHOD_PUBLIC = "method_public";String KEY_METHOD_DEFAULT = "method_default";String KEY_METHOD_PROTECTED = "method_protected";String KEY_METHOD_PRIVATE = "method_private";String KEY_FIELD_PUBLIC = "field_public";String KEY_FIELD_DEFAULT = "field_default";String KEY_FIELD_PROTECTED = "field_protected";String KEY_FIELD_PRIVATE = "field_private";String[] keys ={KEY_CLASS,KEY_METHOD_PUBLIC,KEY_METHOD_DEFAULT,KEY_METHOD_PROTECTED,KEY_METHOD_PRIVATE,KEY_FIELD_PUBLIC,KEY_FIELD_DEFAULT,KEY_FIELD_PROTECTED,KEY_FIELD_PRIVATE };public Box fieldBox = new Box();public Box methodBox = new Box();public ClassFigure(Class<?> cls) {setLayoutManager(new ToolbarLayout());setBorder(new LineBorder(ColorConstants.black));setBackgroundColor(ColorConstants.yellow);setOpaque(true);for (int i = 0; i < keys.length; i++)registry.put(keys[i],ImageDescriptor.createFromFile(null,"C:/icons/java/" + keys[i] + ".gif"));Label title = new Label(cls.getName(), registry.get(KEY_CLASS));add(title);add(fieldBox);add(methodBox);Field[] fields = cls.getDeclaredFields();for (int i = 0; i < fields.length; i++) {Field field = fields[i];Image image = null;if (Modifier.isPublic(field.getModifiers())) {image = registry.get(KEY_FIELD_PUBLIC);} else if (Modifier.isProtected(field.getModifiers())) {image = registry.get(KEY_FIELD_PROTECTED);} else if (Modifier.isPrivate(field.getModifiers())) {image = registry.get(KEY_FIELD_PRIVATE);} else {image = registry.get(KEY_FIELD_DEFAULT);}fieldBox.add(new Label(fields[i].getName(), image));}Method[] methods = cls.getDeclaredMethods();for (int i = 0; i < methods.length; i++) {Method method = methods[i];Image image = null;if (Modifier.isPublic(method.getModifiers())) {image = registry.get(KEY_METHOD_PUBLIC);} else if (Modifier.isProtected(method.getModifiers())) {image = registry.get(KEY_METHOD_PROTECTED);} else if (Modifier.isPrivate(method.getModifiers())) {image = registry.get(KEY_METHOD_PRIVATE);} else {image = registry.get(KEY_METHOD_DEFAULT);}methodBox.add(new Label(methods[i].getName(), image));}}}class Box extends Figure {public Box() {setBorder(new BoxBorder());ToolbarLayout toolbarLayout = new ToolbarLayout();toolbarLayout.setStretchMinorAxis(false);setLayoutManager(toolbarLayout);}private class BoxBorder extends AbstractBorder {public Insets getInsets(IFigure figure) {return new Insets(1, 0, 0, 0);}public void paint(IFigure figure, Graphics graphics, Insets insets) {Rectangle rect = getPaintRectangle(figure, insets);graphics.drawLine(rect.getTopLeft(), rect.getTopRight());}}}public class ClassAnalyzer extends ApplicationWindow {Text className;Canvas canvas;Figure contents;XYLayout xyLayout;public ClassAnalyzer(Shell parentShell) {super(parentShell);addToolBar(SWT.NULL);}private void showClass(Class<?> cls) {if (cls == null) return;contents.removeAll();Label sup = null;if (cls.getSuperclass() != null) {final Class<?> superClass = cls.getSuperclass();sup = new Label(superClass.getName());sup.setBorder(new LineBorder());sup.setBackgroundColor(ColorConstants.lightGreen);sup.setOpaque(true);sup.addMouseListener(new MouseListener() {public void mousePressed(org.eclipse.draw2d.MouseEvent me) {}public void mouseReleased(org.eclipse.draw2d.MouseEvent me) {}public void mouseDoubleClicked(org.eclipse.draw2d.MouseEvent me) {showClass(superClass);}});}if (sup != null) {contents.add(sup);xyLayout.setConstraint(sup, new Rectangle(20, 20, -1, -1));}ClassFigure classFigure = new ClassFigure(cls);contents.add(classFigure);if (sup == null)xyLayout.setConstraint(classFigure, new Rectangle(20, 20, -1, -1));elsexyLayout.setConstraint(classFigure,new Rectangle(20, sup.getBounds().height + 40, -1, -1));if (sup != null) {PolylineConnection connection = new PolylineConnection();ChopboxAnchor source = new ChopboxAnchor(classFigure);ChopboxAnchor target = new ChopboxAnchor(sup);connection.setSourceAnchor(source);connection.setTargetAnchor(target);PolygonDecoration decoration = new PolygonDecoration();PointList list = new PointList();list.addPoint(-2, -2);list.addPoint(0, 0);list.addPoint(-2, 2);decoration.setTemplate(list);connection.setTargetDecoration(decoration);contents.add(connection);}getShell().setSize(contents.getPreferredSize().width + 30,contents.getPreferredSize().height + 80);}protected Control createContents(Composite parent) {Composite composite = new Composite(parent, SWT.NULL);composite.setLayout(new FillLayout());canvas = new Canvas(composite, SWT.NULL);canvas.setBackground(getShell().getDisplay().getSystemColor(SWT.COLOR_WHITE));LightweightSystem lws = new LightweightSystem(canvas);contents = new Figure();xyLayout = new XYLayout();contents.setLayoutManager(xyLayout);lws.setContents(contents);showClass(this.getClass());getToolBarManager().add(new Action("Set class ...") {public void run() {InputDialog dialog =new InputDialog(getShell(),"","Please enter the class name","",null);if (dialog.open() != Dialog.OK) return;contents.removeAll();Class<?> cls = null;try {cls = Class.forName(dialog.getValue());} catch (ClassNotFoundException e) {e.printStackTrace();}if (cls != null) {showClass(cls);}}});getToolBarManager().update(true);return composite;}public static void main(String[] args) {ClassAnalyzer window = new ClassAnalyzer(null);window.setBlockOnOpen(true);window.open();Display.getCurrent().dispose();}}