135 2005-01-31 04:36:03 +0100 GLCanvas should interact better with lightweights 2010-03-24 07:47:24 +0100 0 0 3 JogAmp Jogl core 1 All all VERIFIED WONTFIX P3 normal --- 1 sgothel sgothel DEFECT --- oldest_to_newest 151 0 sgothel 2010-03-24 07:47:24 +0100 ---- Reported by kbr 2005-01-31 16:36:03 ---- Several issues were raised roughly a year and a half ago, when JOGL was introduced, indicating that GLCanvas should behave better when placed in the midst of lightweight components; in particular, that it should respect setMinimumSize, setPreferredSize, and setMaximumSize, as I understand that lightweight widgets do. We should investigate this issue and provide such support. See JOGL Issue 17 for an example which seems to misbehave when Swing widgets surround a GLCanvas. ---- Additional Comments From kbr 2005-05-01 12:34:03 ---- Created an attachment Test case illustrating problem ---- Additional Comments From kbr 2005-05-01 13:12:17 ---- This has come up again on the JOGL forum on javagaming.org: http://www.javagaming.org/cgi-bin/JGNetForums/YaBB.cgi?board=jogl;action=display;num=1114904448 This problem appears to have no good solution. The root cause is behavior of the Canvas, and in particular its ComponentPeer. The implementation of getPreferredSize() calls getMinimumSize() and getMinimumSize() turns around and calls Component.getSize(). This effectively means that the Canvas will report its preferred size as being as large as the component has ever been. For some layout managers this doesn't seem to matter, but for others like the BoxLayout it does. See the attached test case for an example. Replacing the GLCanvas with an ordinary Canvas yields the same behavior. One suggestion was to override getPreferredSize() so that if a preferred size has not been set by the user, to default to (0, 0). This works fine for the supplied test case but breaks all of the other demos because they use a different LayoutManager. There appear to be a lot of interactions between heavyweight vs. lightweight widgets and layout managers. One experiment which was done was to override setSize() in GLCanvas to update the preferred size. This works down to the size specified by the user; if the window is resized any smeller the same problem appears. If reshape() (the base routine of setSize(), setBounds(), etc.) is changed to do the same thing, the demo breaks in the same way it originally did. Therefore this solution is fragile because it isn't clear which of these methods are used internally by the AWT and for what purposes. There are two possible workarounds, both application-specific. The best and most portable appears to be to put the GLCanvas into a JPanel and set the JPanel's preferred size to (0, 0). The JPanel will cause this constraint to be enforced on its contained GLCanvas. The other workaround is to call setPreferredSize(new Dimension(0, 0)) on a newly-created GLCanvas; this method is new in 1.5. This bug is being marked as "wontfix" because the behavior is unchanged from the underlying Canvas class and it looks like making any change is going to break something else. ---- Additional Comments From kbr 2005-05-01 13:13:31 ---- Created an attachment Test case from JOGL forums including commented-out workaround ---- Additional Comments From moorej 2007-11-30 10:42:15 ---- Created an attachment Updated resize issue to include new workaround and make it work with the ratified jogl release --- Bug imported by sgothel@jausoft.com 2010-03-24 07:47 EDT --- This bug was previously known as _bug_ 135 at https://jogl.dev.java.net/bugs/show_bug.cgi?id=135 Imported an attachment (id=38) Imported an attachment (id=39) Imported an attachment (id=40) The original submitter of attachment 38 is unknown. Reassigning to the person who moved it here: sgothel@jausoft.com. The original submitter of attachment 39 is unknown. Reassigning to the person who moved it here: sgothel@jausoft.com. The original submitter of attachment 40 is unknown. Reassigning to the person who moved it here: sgothel@jausoft.com. 38 2005-05-01 12:34:00 +0200 2005-05-01 12:34:00 +0200 Test case illustrating problem GearsWithButtons.java text/plain 13279 sgothel aW1wb3J0IGphdmEuYXd0Lio7DQppbXBvcnQgamF2YS5hd3QuZXZlbnQuKjsNCmltcG9ydCBqYXZh eC5zd2luZy4qOw0KDQppbXBvcnQgbmV0LmphdmEuZ2FtZXMuam9nbC4qOw0KDQovKioNCiAqIEdl YXJzLmphdmEgPEJSPg0KICogYXV0aG9yOiBCcmlhbiBQYXVsIChjb252ZXJ0ZWQgdG8gSmF2YSBi eSBSb24gQ2VtZXIgYW5kIFN2ZW4gR29ldGhlbCkgPFA+DQogKg0KICogVGhpcyB2ZXJzaW9uIGlz IGVxdWFsIHRvIEJyaWFuIFBhdWwncyB2ZXJzaW9uIDEuMiAxOTk5LzEwLzIxDQogKi8NCg0KcHVi bGljIGNsYXNzIEdlYXJzV2l0aEJ1dHRvbnMgew0KICBwdWJsaWMgc3RhdGljIHZvaWQgbWFpbihT dHJpbmdbXSBhcmdzKSB7DQogICAgSkZyYW1lIGZyYW1lID0gbmV3IEpGcmFtZSgiR2VhciBEZW1v Iik7DQogICAgR0xDYW52YXMgY2FudmFzID0gR0xEcmF3YWJsZUZhY3RvcnkuZ2V0RmFjdG9yeSgp LmNyZWF0ZUdMQ2FudmFzKG5ldyBHTENhcGFiaWxpdGllcygpKTsNCg0KICAgIC8vIFVzZSBkZWJ1 ZyBwaXBlbGluZQ0KICAgIC8vICAgIGNhbnZhcy5zZXRHTChuZXcgRGVidWdHTChjYW52YXMuZ2V0 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