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GEF�~�辑器的区域及滚动条

Hexise — Fri, 29 Dec 2006 05:16:00 GMT

GEF�~�辑器是构架在Draw2D的FigureCanvas上的,而FigureCanvas是swt中Canvas的子�c?

当得到FigureCanvas之后,��可以得到GEF�~�辑器的区域和GEF�~�辑器内部画布的大小:

�~�辑器区域大��?FigureCanvas.getBounds();
�q�是�q�用了FigureCanvas是Canvas子类的特�?调用SWT的Canvas的getBounds()�Ҏ��,卌��用Control的getBounds()�Ҏ��.

��d��大小:FigureCanvas.getContents.getBounds();
�q�是�q�用了IFigure的getBounds()�Ҏ��, �q�两个区域矩形不可�؜�?

若要触发GEF�~�辑器的滚动条操�?仅需调用FigureCanvas的scrollToX(int hOffset)和scrollToY(int vOffset)卛_��.

获取FigureCanvas的方法也比较��?通过EditPart.getViewer()获得EditPartViewer,一般情况下EditPartViewer的Control��是FigureCanvas.

列出代码如下:

FigureCanvas canvas = (FigureCanvas)EditPart.getViewer().getControl();
canvas.scrollToX( 500 );
canvas.scrollToY( 600 );
System.out.println(canvas.getBounds());
System.out.println(canvas.getContents().getBounds());

Hexise 2006-12-29 13:16 发表评论

eclipse创徏Image�Ҏ��

Hexise — Fri, 29 Dec 2006 04:43:00 GMT

通过囑փ�的相对�\径创建org.eclipse.swt.graphics.Image,我通常使用下面两种途径:

1.使用Image(Device device, InputStream stream)构造函�?�C�Z��代码如下, path为图像相对�\�?

private Image getImage(String path){
return new Image(Display.getCurrent(), getClass().getResourceAsStream(path));
}

2.使用ImageDescriptor的createImage()�Ҏ��,�C�Z��代码如下,path为图像相对�\�?

private Image getImage(String path){
  URL url = null;
  try{
   url = new URL(Activator.getDefault().getDescriptor().getInstallURL(), path);
  }catch(MalformedURLException e){
   e.printStackTrace();
  }
  ImageDescriptor imageDescriptor = ImageDescriptor.createFromURL(url);
  return imageDescriptor.createImage();
}

或�?

private Image getImage(String path){
ImageDescriptor desc = AbstractUIPlugin.imageDescriptorFromPlugin(ID, path);
return desc.createImage();
}

Hexise 2006-12-29 12:43 发表评论

Hexise — Fri, 29 Dec 2006 04:26:00 GMT

转换�?font color="#ff0000">相对坐标,要运用translateToRelative(Point point)�Ҏ��.

例如,在Eclipse Editor视图中加入Figure,需要计��出相对于HostFigure的坐�?才能正确��figure攑֜�鼠标点击的位�|?可以如下�q�样�?

在getCreateCommand(CreateRequest request)�Ҏ��?加入如下语句:

Point location = request.getLocation().getCopy();
getHostFigure().translateToRelative(location);

如此获得的location��是相对于HostFigure的坐�?

能够获得当前光标�l�对坐标的方法是:

Display.getDefault().getCursorLocation()

Hexise 2006-12-29 12:26 发表评论

Eclipse插�g如何��h��资源��理�?

Hexise — Fri, 29 Dec 2006 04:19:00 GMT

最�q�项目中出现了一个bug,提示是Resource can not sync with file system.是文件系�l�不同步的问�?需要手动刷��C��下资源管理器.

��h��资源��理器调用方�?

RefreshLocal

public void refreshLocal(int depth, IProgressMonitor monitor)
throws CoreException

Refreshes the resource hierarchy from this resource and its children (to the specified depth) relative to the local file system. Creations, deletions, and changes detected in the local file system will be reflected in the workspace's resource tree. This resource need not exist or be local.
This method may discover changes to resources; any such changes will be reported in a subsequent resource change event.

If a new file or directory is discovered in the local file system at or below the location of this resource, any parent folders required to contain the new resource in the workspace will also be created automatically as required.

This method is long-running; progress and cancellation are provided by the given progress monitor.

Parameters:
depth - valid values are DEPTH_ZERO, DEPTH_ONE, or DEPTH_INFINITE
monitor - a progress monitor, or null if progress reporting is not desired
Throws:
CoreException - if this method fails. Reasons include:
Resource changes are disallowed during certain types of resource change event notification. See IResourceChangeEvent for more details.
OperationCanceledException - if the operation is canceled. Cancelation can occur even if no progress monitor is provided.
See Also:
DEPTH_ZERO, DEPTH_ONE, DEPTH_INFINITE, IResourceRuleFactory.refreshRule(IResource)

该方法位于org.eclipse.core.resources.IResource

我的调用�Ҏ��?

ResourcesPlugin.getWorkspace().getRoot().refreshLocal(IResource.DEPTH_INFINITE, monitor);

Hexise 2006-12-29 12:19 发表评论

属于自己的Property View

Hexise — Fri, 29 Dec 2006 03:14:00 GMT

可以扩展属于自己的property view�?换句话说,能否再扩展出一个property view出来,�q�对它进行定�?

�{�案是可以的.

如果你所写的Property View�cȝ��承自PropertySheet,那么它就是扩展出的新property view. 你同样可以对其进行定�?不会�q�扰到原有的property的正常显�C?

例如,你可以让你的property view 不监听某个XYZView中的事�g,只需要覆盖掉isImportant�Ҏ��可以了.

import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.views.properties.PropertySheet;

public class PropertyView extends PropertySheet {

   protected boolean isImportant(IWorkbenchPart part) {
         return part != this && ! (part instanceof XYZView);
    }
}

Hexise 2006-12-29 11:14 发表评论

色拍自拍亚洲综合图区,久久精品亚洲福利,亚洲五月六月丁香激情

GEF�~�辑器的区域及滚动条

eclipse创徏Image�Ҏ��

Eclipse插�g如何��h��资源���理�?

属于自己的Property View

Eclipse插�g如何��h��资源��理�?