java - Custom JPanel causing rendering problems in second custom JPanel -


bit of odd 1 here. have 2 classes extending jpanel, overriding paintcomponent in both. 1 implements runnable (for animation purposes).

however, when used runnable 1 on top, wonderful "paint copy of mouse points at" in background of runnable instance. see screenshots below:

using_a_jpanel

using custom component

the difference between 2 me using jpanel in former , custom jpanel background image in latter. code second jpanel below:

package view.widgets;  import java.awt.graphics; import java.awt.graphics2d; import java.awt.image.bufferedimage; import java.io.file; import java.io.ioexception;  import javax.imageio.imageio; import javax.swing.jpanel;  public class paintedjpanel extends jpanel {      private static final long serialversionuid = 1l;     private bufferedimage backgroundimage = null;      public paintedjpanel() {         super();     }      public paintedjpanel(file image) {         super();         try {             backgroundimage = imageio.read(image);         } catch (ioexception e) {             e.printstacktrace();         }     }      @override     protected void paintcomponent(graphics g) {         graphics2d g2d = (graphics2d) g;         if(null != backgroundimage) {             g2d.drawimage(backgroundimage, 0, 0, null);         }     }      public bufferedimage getbackgroundimage() {         return backgroundimage;     }      public void setbackgroundimage(bufferedimage backgroundimage) {         this.backgroundimage = backgroundimage;     }  }

edit: editing in details because enter key shouldn't submit question when i'm adding tags.

finished editing @ 13:38.

ah, paintcomponent method is missing super's call. change

@override protected void paintcomponent(graphics g) {     graphics2d g2d = (graphics2d) g;     if(null != backgroundimage) {         g2d.drawimage(backgroundimage, 0, 0, null);     } }

to 

@override protected void paintcomponent(graphics g) {     super.paintcomponent(g);     graphics2d g2d = (graphics2d) g;     if(null != backgroundimage) {         g2d.drawimage(backgroundimage, 0, 0, null);     } }

as noted in comments question (before seeing code), without calling super, you're breaking painting chain, possibly resulting in side effects child component rendering.


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