java - JavaFX why does ScrollPane require two group wrappings to re-compute its scollbars? -


in example, image of map set on scrollpane in fxml file.

http://hg.openjdk.java.net/openjfx/8u-dev/rt/rev/36a59c629605

the image resizable other method changes scale of group - zoomgroup - containing image.

+    private void zoom(double scalevalue) { +//    system.out.println("airportapp.controller.zoom, scalevalue: " + scalevalue); +        double scrollh = map_scrollpane.gethvalue(); +        double scrollv = map_scrollpane.getvvalue(); +        zoomgroup.setscalex(scalevalue); +        zoomgroup.setscaley(scalevalue); +        map_scrollpane.sethvalue(scrollh); +        map_scrollpane.setvvalue(scrollv); +    }

but in order make sure scrollpane re-computes scrollbars (so scrollable area changes include entire image @ scale) group wraps image, zoomgroup, wrapped in group, contentgroup, set scrollpane's content. 

+        // wrap scroll content in group scrollpane re-computes scroll bars +        group contentgroup = new group(); +        zoomgroup = new group(); +        contentgroup.getchildren().add(zoomgroup); +        zoomgroup.getchildren().add(map_scrollpane.getcontent()); +        map_scrollpane.setcontent(contentgroup);

can explain why necessary?

this video accompanies files: https://www.youtube.com/watch?v=ij0hwralcmo


Comments

Post a Comment

Popular posts from this blog

c# - Validate object ID from GET to POST -

i have method allows user access comment have made on site. have post method lets them update comment. my normal solution send entire comment model through, let them update it, update on database when post back. involve sending commentid through in hiddenfor , can manipulated. how can verify commentid sent in get method same i'm getting in post , not able alter comment wish? how can verify commentid sent in method same i'm getting in post? basically have validate following things in post - user logged-in user. authenticated users post comments. commentid in post , should valid commentid , should present in database. userid associated logged-in user should same userid associated comment . comment should contain userid column, can check @ time of update. to make sure update happens comment has been sent in get - hold commentid in session , in post action compare commentid value in session .
Read more

node.js - Custom Model Validator SailsJS -

when using custom model validator checks record within model. return within spread doesn't seem end control flow. //post.js model /** * custom validator **/ types: { isuservalid: function(user_id) { var promise = require('bluebird'); promise.all([ user.findone({id: user_id}) ]) .spread(function(user) { console.log(user); if (user === null || user === undefined) { console.log('failed'); return false; }else{ console.log('passed'); return true; } }); } }, my response standard validation failed response. { "error": "e_validation", "status": 400, "summary": "1 attribute invalid", "model": "post", "invalidattributes": { "owner": [ { "rule": "isuservalid", ...
Read more

php - Find a regex to take part of Email -

i have following emails need extract part from: bestellnummer xxx: 1 von xxx, 1er pack ------------- anfang der nachricht ------------- foo bar baz foo bar baz // <<<<< need text here ------------- ende der nachricht ------------- ------------- anfang der nachricht ------------- foo bar baz foo bar baz ------------- ende der nachricht ------------- there 0 unlimited occurences of ------------- anfang der nachricht ------------- ------------- ende der nachricht ------------- and i'm able extract first part regex: $re = "/------------- .*? -------------.?(.*?).?------------- .*? -------------/s"; but, i'm quite new on learning regex, i'm pretty sure there must better regex extract part (foo bar baz foo bar baz) of text between ------------- anfang der nachricht ------------- ------------- ende der nachricht ------------- as can in different languages, i'm using .? to match between hyphens. i...
Read more