Hi Michael, "Bishop, Michael W. CONTR J9C880" <[EMAIL PROTECTED]> wrote on 09/21/2006 08:36:21 AM:
> Yes, but there might be something going on that I need to wait for. What I'm > doing is switching documents in my application (previous page/next page). > Does setting a new SVGDocument in a JSVGCanvas do something that I need to wait for? Yes, you need to wait for the GVTTreeBuilder to complete. > jsvgCanvas.setDocument(svgDocument); > // Wait for some listener to tell me CSS cascade is done... > > I figured this was related to the background color as well and it's part of > the problem. When I switch pages, I want to read the background of the page I > switch to, so my color control will match. > > Michael Bishop > > ________________________________ > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > Sent: Thu 9/21/2006 5:47 AM > To: [email protected] > Cc: [email protected] > Subject: RE: Visibility on an element? > > > > Hi Michael, > > "Bishop, Michael W. CONTR J9C880" <[EMAIL PROTECTED]> wrote on > 09/19/2006 10:22:29 AM: > > > Any ideas on this? > > For what ever reason the DOM you are working with does not have > the CSS cascade done. Are you sure that this node is from the > document in the Canvas and that the canvas was built with > dynamic support? In some cases the Canvas will clone > the given document so that the document it renders uses the > Batik DOMImplementation. > > BTW, this is just another manifestation of the same problem > you had with the background color... > > > I tried using the CSSUtilities method. Here's the > > element I tested: > > > > <g style="display: block" xmlns="http://www.w3.org/2000/svg"; > > id="SVGWB-1125B997-4DAD-AB9C-13B0-2D57691CF303" > > xmlns:xlink="http://www.w3.org/1999/xlink"; > > xmlns:svgx="http://je.jfcom.mil/svgx"; svgx:name="default_layer" > > svgx:type="layer" pointer-events="none"/> > > > > And I got a stack trace that goes into the CSSUtilities: > > > > Caused by: java.lang.NullPointerException > > > > at org.apache.batik.bridge.CSSUtilities.convertDisplay(Unknown > > Source) > > > > > > > at > > mil.jfcom.cie.whiteboard.util.LayerUtil.isVisible(LayerUtil.java:85) > > > > at > > mil.jfcom.cie.whiteboard.ui.WBLayerListItem.initJCheckBox(WBLayerListIte > > m.java:119) > > > > at > > mil.jfcom.cie.whiteboard.ui.WBLayerListItem.init(WBLayerListItem.java:10 > > 3) > > > > at > > mil.jfcom.cie.whiteboard.ui.WBLayerListItem.<init>(WBLayerListItem.java: > > 58) > > > > at > > mil.jfcom.cie.whiteboard.ui.WBLayerPanel.rebuildLayerList(WBLayerPanel.j > > ava:68) > > > > at > > mil.jfcom.cie.whiteboard.ui.managers.GUIManager.rebuildLayerList(GUIMana > > ger.java:210) > > > > at > > mil.jfcom.cie.whiteboard.ui.managers.GUIManager.rebuildLayerInfo(GUIMana > > ger.java:202) > > > > at > > mil.jfcom.cie.whiteboard.ui.managers.GUIManager.setSvgDocument(GUIManage > > r.java:184) > > > > at > > mil.jfcom.cie.whiteboard.ui.managers.WBManager.setDefaultWhiteboard(WBMa > > nager.java:105) > > > > at mil.jfcom.cie.whiteboard.Main.main(Main.java:85) > > > > ... 6 more > > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > > Sent: Sunday, September 17, 2006 8:45 AM > > To: [email protected] > > Cc: [email protected] > > Subject: Re: Visibility on an element? > > > > Hi Michael, > > > > "Bishop, Michael W. CONTR J9C880" <[EMAIL PROTECTED]> wrote on > > > > 09/15/2006 01:29:18 PM: > > > > > Is there any way to determine whether or not an SVG is visible? I?m > > looking > > > for a global solution. I?m trying to work with layers: > > > > I guess I'm not sure what you mean by visibility. As you hint > > below visibility doesn't mean much for a group (as any child can > > set 'visibility="visible"' and be visible). Also many things like > > fill='none' stroke='none', or opacity='0' are treated very similar > > to visibility='hidden'. > > > > > <g style=?display:none?> is the way I indicate a layer is not visible. > > > > I?m > > > sure there are other ways to turn it off as well. > > > > display:none is a bit different as children can not override this. > > Additionally a display:none element won't have any 'peer' in the > > Graphics tree. The easiest thing is to use the CSS DOM to query > > the value of the 'display' property on the element. > > > > > However, for visible layers: > > > > > > <g> and <g style=?display:block?> would work and I?m sure there are > > other ways. > > > > In SVG there is display:none and display:<anything else> so you > > simply > > need to check if the display properties value is 'none'. The first case > > will have it's parent's value for display. > > > > > Is there a way to find this out? Maybe at a lower-level? Is there a > > point > > > where Batik decides whether or not to draw a particular object? > > Obviously a > > > <g> tag isn?t typically ?drawn? anyway so this setting would apply to > > its > > > children which may complicate the solution. > > > > We use 'batik.bridge.CSSUtilities.convertDisplay(Element e)' to > > determine this. > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > > [attachment "winmail.dat" deleted by Thomas E. 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