我的程序似乎运行良好,但是当我尝试调整组件大小时,我不断收到“IllegalStateExceptions:RunnableQueue 未启动或已退出”。我已将 documentState 设置为 ALWAYS_DYNAMIC,并且我读到您应该使用 JSVGCanvas 的 UpdateManager 并调用 invokelater()。我了解它在第一次之后可用
gvtBuildCompleted(GVTTreeBuilderEvent e)
被调用,所以我在使用它之前检查它是否正在运行,但我仍然得到异常。下面的方法被一个线程反复调用,似乎导致了异常:
private void updateDomTree(final SVGComponent component, final Document doc)
{
if(component.getSvgCanvas().getUpdateManager() != null && component.getSvgCanvas().getUpdateManager().isRunning())
{
component.getSvgCanvas().getUpdateManager().getUpdateRunnableQueue().invokeLater(new Runnable()
{
public void run()
{
final Node newNode = doc.getChildNodes().item(0).getFirstChild();
//could be easier to get this value, but ... it works.
String newNodeId = newNode.getAttributes().getNamedItem("id").getFirstChild().getNodeValue();
NodeList nodes = component.getSvgDocument().getDocumentElement().getChildNodes();
Node updateNode = findElementById(nodes, newNodeId);
resizeComponent(component, doc);
component.getSvgCanvas().getSVGDocument().adoptNode(newNode);
component.getSvgCanvas().getSVGDocument().getDocumentElement().replaceChild(newNode, updateNode);
component.refreshSVGCanvas();
}
});
}
}
实际调整大小在这里完成:
protected void resizeComponent(SVGComponent component, Document doc)
{
Element svgRoot = doc.getDocumentElement();
final int svgWidth = Integer.parseInt(svgRoot.getAttribute("width"));
final int svgHeight = Integer.parseInt(svgRoot.getAttribute("height"));
String[] viewBox = svgRoot.getAttribute("viewBox").split(" ");
int viewBoxLeft = Integer.parseInt(viewBox[0]);
int viewBoxTop = Integer.parseInt(viewBox[1]);
final float factor = component.getScaleFactor();
String[] viewBoxOld = component.getSvgDocument().getDocumentElement().getAttribute("viewBox").split(" ");
int viewBoxLeftOld = Integer.parseInt(viewBoxOld[0]);
int viewBoxTopOld = Integer.parseInt(viewBoxOld[1]);
int xDiff = (int) ((viewBoxLeftOld - viewBoxLeft)*factor);
int yDiff = (int) ((viewBoxTopOld - viewBoxTop)*factor);
if ( viewBoxLeftOld != viewBoxLeft ) //If there is additional content left
{
component.setLocation(component.getLocation().x - xDiff, component.getLocation().y);
}
if ( viewBoxTopOld != viewBoxTop ) //If there is additional content right)
{
component.setLocation(component.getLocation().x, component.getLocation().y - yDiff);
}
component.getSvgDocument().getDocumentElement().setAttribute("width",""+svgWidth);
component.getSvgDocument().getDocumentElement().setAttribute("height",""+svgHeight);
component.getSvgDocument().getDocumentElement().setAttribute("viewBox", ""+viewBoxLeft+" "+viewBoxTop+" "+svgWidth+" "+svgHeight);
component.setSize((int)(svgWidth*factor),(int)(svgHeight*factor));
}
方法
refreshJSVGCanvas()
来电
JSVGCanvas.setDocument(Document);
JSVGCanvas.setSize(int, int);
这是完整的堆栈跟踪:
Exception in thread "AWT-EventQueue-0" java.lang.IllegalStateException: RunnableQueue not started or has exited
at org.apache.batik.util.RunnableQueue.invokeLater(RunnableQueue.java:277)
at org.apache.batik.swing.svg.AbstractJSVGComponent.updateRenderingTransform(AbstractJSVGComponent.java:1057)
at org.apache.batik.swing.gvt.AbstractJGVTComponent$1.componentResized(AbstractJGVTComponent.java:237)
at java.awt.AWTEventMulticaster.componentResized(Unknown Source)
at java.awt.Component.processComponentEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
在此先感谢,我到处搜索并尝试了很多,但找不到解决方案。
编辑:这是 Batik 的 invokeLater-Method 实际抛出异常的地方:
public void invokeLater(Runnable r) {
if (runnableQueueThread == null) {
throw new IllegalStateException
("RunnableQueue not started or has exited");
}
synchronized (list) {
list.push(new Link(r));
list.notify();
}
}
runnableQueueThrad 设置在该类的 run()-Method 中,并在最后设置为 null。所以我想我必须做一些同步。