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我是GEF的新手。 所以我試圖按照我的項目文件中的示例示例。getActiveWorkbenchWindow（）當我在postStartup（）方法中調用它時返回null
但是，當我試圖開始我的例子，我得到了一個NullPointerException。
at kr.co.hoony.test.ApplicationWorkbenchAdvisor.postStartup(ApplicationWorkbenchAdvisor.java:37)
而且我的代碼如下圖所示。
@Override
public void postStartup() {
try {
IWorkbenchPage wbPage = PlatformUI.getWorkbench()
.getActiveWorkbenchWindow()
.getActivePage();
wbPage.openEditor(
new MyEditorInput("KSH"),
MyGraphicalEditor.ID,
false);
} catch (Exception e) {
e.printStackTrace();
}
}
所以我試圖尋找，我發現一個解決方案，我再次嘗試像下面。
@Override
public void postStartup() {
Display.getDefault().asyncExec(new Runnable() {
@Override
public void run() {
try {
IWorkbenchPage wbPage = PlatformUI.getWorkbench()
.getActiveWorkbenchWindow()
.getActivePage();
wbPage.openEditor(
new MyEditorInput("KSH"),
MyGraphicalEditor.ID,
false);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
那麼，有沒有錯誤消息，但還有另一個問題。
我想在活動頁面上顯示一些標籤，但它不起作用。
所以我要上傳我寫
Block.java
package kr.co.hoony.test.example;
public class Block {
private String name;
private String width;
public Block() {
this.name = "Block";
this.width = "20";
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getWidth() {
return width;
}
public void setWidth(String width) {
this.width = width;
}
}
BlockEditPartFactory.java
package kr.co.hoony.test.example;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.EditPartFactory;
import org.eclipse.gef.editparts.AbstractGraphicalEditPart;
public class BlockEditPartFactory implements EditPartFactory {
@Override
public EditPart createEditPart(EditPart context, Object model) {
AbstractGraphicalEditPart part = null;
if(model instanceof Block){
part = new BlockGrahpicalEditPart();
}
part.setModel(model);
return part;
}
}
BlockFigure.java
package kr.co.hoony.test.example;
import org.eclipse.draw2d.ColorConstants;
import org.eclipse.draw2d.Figure;
import org.eclipse.draw2d.Label;
import org.eclipse.draw2d.LineBorder;
import org.eclipse.draw2d.XYLayout;
import org.eclipse.draw2d.geometry.Rectangle;
public class BlockFigure extends Figure {
private Label labelName = new Label();
private Label labelWidth = new Label();
private XYLayout layout;
public BlockFigure() {
layout = new XYLayout();
setLayoutManager(layout);
labelName.setForegroundColor(ColorConstants.blue);
add(labelName);
setConstraint(labelName, new Rectangle(5, 5, -1, -1));
labelWidth.setForegroundColor(ColorConstants.green);
add(labelWidth);
setConstraint(labelWidth, new Rectangle(5, 5, -1, -1));
setForegroundColor(ColorConstants.black);
setBorder(new LineBorder(5));
}
public void setLabelName(Label labelName) {
this.labelName = labelName;
}
public void setLabelWidth(Label labelWidth) {
this.labelWidth = labelWidth;
}
public void setLayout(XYLayout layout) {
this.layout = layout;
}
}
BlockGraphic所有代碼alEditPart.java
package kr.co.hoony.test.example;
import org.eclipse.draw2d.IFigure;
import org.eclipse.gef.editparts.AbstractGraphicalEditPart;
public class BlockGrahpicalEditPart extends AbstractGraphicalEditPart {
@Override
protected IFigure createFigure() {
IFigure figure = new BlockFigure();
return figure;
}
@Override
protected void createEditPolicies() {
// TODO Auto-generated method stub
}
}
MyEditorInput.java
package kr.co.hoony.test.example;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IPersistableElement;
public class MyEditorInput implements IEditorInput {
public String name = null;
public MyEditorInput(String name){
this.name = name;
}
@Override
public Object getAdapter(Class adapter) {
return null;
}
@Override
public boolean exists() {
return (this.name != null);
}
@Override
public boolean equals(Object o) {
if(!(o instanceof MyEditorInput))
return false;
return ((MyEditorInput)o).getName().equals(this.getName());
}
@Override
public ImageDescriptor getImageDescriptor() {
return ImageDescriptor.getMissingImageDescriptor();
}
@Override
public String getName() {
return this.name;
}
@Override
public IPersistableElement getPersistable() {
return null;
}
@Override
public String getToolTipText() {
return this.name;
}
}
MyGraphicalEditor.java
package kr.co.hoony.test.example;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.gef.DefaultEditDomain;
import org.eclipse.gef.ui.parts.GraphicalEditor;
public class MyGraphicalEditor extends GraphicalEditor {
public static final String ID = "kr.co.hoony.test.example.MyGraphicalEditor";
public MyGraphicalEditor() {
setEditDomain(new DefaultEditDomain(this));
}
@Override
protected void initializeGraphicalViewer() {
// TODO Auto-generated method stub
}
@Override
public void doSave(IProgressMonitor monitor) {
// TODO Auto-generated method stub
}
}
我不知道，不作任何我做標籤的效果的原因。 有沒有人告訴我我還沒有抓到的地步？