java - JComboBox DropDown list is not displayed -


this might duplicate of jcombobox popup menu not appearing , rather old question , not been active quite time, plus answers not solutions, helped problem. decided create new question.

the problem follows: got application of prior colleque, not work @ company anymore. tried adding jcombobox jpanel. jcombobox displayed expected, behaves in same way described seth in question:

1) first click on expand button nothing. second click highlights contents of box, popup still doesn't appear.

2) once i've clicked button , given focus, up/down keystrokes cycle through entries correctly.

i have broken down code think minimum of needed programming, have problem occur. (as 1 comment in mentioned question mentioned provide sscce, never happened).

now here code can provide:

public static class createprojectdialog extends jframe {  private dimension size = toolkit.getdefaulttoolkit().getscreensize();  public createprojectdialog() {      setdefaultcloseoperation(exit_on_close);     int sz_incr = 1;      // passe fontgröße resolution an:     if (size.width > 1920) {         sz_incr = 2;     }      // initialize glass layer     final jpanel panelglass = (jpanel) getglasspane();     panelglass.setlayout(null);     panelglass.setvisible(true);      private static jpanel licborrowpanel = null;      licborrowpanel = new jpanel();     licborrowpanel.setbounds(0, 20, 1000, 500);     licborrowpanel.setvisible(false);     licborrowpanel.setbackground(color.white);     panelglass.add(licborrowpanel); }  public static void main(string[] args) {     hauptframe = new createprojectdialog(); }  public static void licenceborrowdialog() {      int mainwidth = hauptframe.getsize().width;     int mainheight = hauptframe.getsize().height;      // pick date     jcombobox daylist = new jcombobox();     dateformat df = new simpledateformat("dd/mm/yyyy");     calendar caltoday = calendar.getinstance();     date daytoday = caltoday.gettime();     int weekday = caltoday.get(calendar.day_of_week);     string weekdayname = "";     (int = 1; <= 22; i++){         daytoday.setdate(daytoday.getdate()+1);         weekday = daytoday.getday();         weekdayname = translateweekday(weekday);         daylist.additem(i + " day(s) until " + weekdayname + " " + df.format(daytoday));     }     daylist.setopaque(true);     daylist.setselectedindex(2);     daylist.setbounds(mainwidth / 2 - (125*sz_incr), (165*sz_incr), (250*sz_incr), (100*sz_incr));     licborrowpanel.add(daylist);      daylist.addactionlistener(new actionlistener(){         public void actionperformed(actionevent e) {             int numberofdays;             jcombobox dl = (jcombobox)e.getsource();             numberofdays = dl.getselectedindex()+1;             labelselecteddate.settext("<html><body><b>count of days: </b>" + numberofdays + "</html></body>");         }     }); }  //translate weekday int name public static string translateweekday(int day){     string retday;     switch (day) {         case 0:  retday = "monday";             break;         case 1:  retday = "truesday";             break;         case 2:  retday = "wednesday";             break;         case 3:  retday = "thursday";             break;         case 4:  retday = "friday";             break;         case 5:  retday = "saturday";             break;         case 6:  retday = "sunday";             break;         default: retday = "invalid day";             break;     }     return retday; } }

i tried popoulating more items (as proposed jluzwick) see, if dropdown hidden behind anything, no.

i have never used getrootpane() instead of getcontentpane(), suspected sehtim.

there jcombobox not displayed , accepted answer set setvisible(true) end of constructor. tried , did not change behaviour in case.

the question need answer to, is: how make dropdown list visible, enable user choose entry?

thanks madprogrammer hint regarding code not compiling - found solution , provide here having similar issue.

the problem result of mixing heavy weight , light weight components (awt / swing).

this resulted in light weight popup being used, occluded other components , not visible.

the solution ( if mix of both heavy , light weight has stay ) disable light weight popup forcing application use backup popup. done replaceing following line:

daylist.setselectedindex(2);

with line:

daylist.setlightweightpopupenabled (false);

i found solution here: http://de.comp.lang.java.narkive.com/t2gps9vy/jcombobox-poppt-nicht-auf


Comments

Post a Comment

Popular posts from this blog

Command prompt result in label. Python 2.7 -

i want put result(output) of shell command label. command works, label shows "0", however, in command prompt, result shown correctly, need showed in label. doing ubuntu. myg1 = button(root, text="rodyti informacija", command=lambda: gauti()) myg1.pack(side=bottom) def gauti(): imti = tekstas.get("1.0", "end-1c") info = subprocess.call("id '{imti}' ".format(imti=imti), shell=true) w = label(root, text= info) w.pack(side = bottom) subprocess.call() returns exit code of process created (in case 0 success). if want text output of process, should instead call subprocess.check_output() .
Read more

javascript - How do I use URL parameters to change link href on page? -

i change href value of link using url parameters. example: default <a id="dlink" href="link-1">link</a> but, when user goes https://url.com/?dlink=link-2 it swaps out link new link <a id="dlink" href="link-2">link</a> first need value url. if you're not using javascript framework can create function using jquery. please check get url parameter jquery or how query string values in js it. after that, element "a" id , set value there. $("#dlink").attr("href", hreffromparam);
Read more

amazon web services - AWS Route53 Trying To Get Site To Resolve To www -

so have domain nameservers pointed aws route 53. site hosted on ec2 instance , reachable resolves site.com, if input www.site.com. i'm curious how site resolve www.site.com. have under route53 domains hosted zone 2 additional record sets outside of ns , soa: a site.com ec2 elastic ip cname www.site.com ec2 public dns i can reach site using both site.com , www.site.com, resolve site.com. there way make if enter either, resolves www.site.com? at first, both should record set. a site.com ec2 elastic ip www.site.com ec2 elastic ip and need redirect setting in web server (nginx, apache, ..) following. (source: how redirect www non-www nginx on centos 7 ) redirect non-www www if want redirect users plain, non-www domain www domain, add server block: server { server_name example.com; return 301 $scheme://www.example.com$request_uri; } save , exit. configures nginx redirect requests "example.com" "www.example.com". not...
Read more