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)); else xyLayout.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(); } }