java - Unable to scroll messages in J2me, I am using lwuit library -
i working last couple of month on j2me chat app. stuck in messages last 1 month. have added screen shot of message screen in comment.
my application scenario described below.
i have form named conservationform border layout. in main form have added further 2 container 1 msgpane boxlayout , other inputpane flowlayout. msgpane contains messages both receiver , sender. each complete message appended in msgpane in form of container named mycontainer. mycontainer contains text , images in form of labels have appended in mycontainer.
i have tried possible options efforts wasted , nothing achieved. in advance assistance.
my skills level in j2me , in lwuit beginner. seeking experts in j2me , lwuit.
i pasting code of conversation message below.
public void /*@shah displayable */ getguiconversation(string msgtext) { final form conservationform = new form(currentroster.jid.getnickname()); boolean cananswer = currentconversation.cananswer(); conservationform.setscrollable(false); //conservationform.repaint(); commented on 26-05-15 conservationform.setlayout(new borderlayout()); conservationform.setunselectedstyle(mainformstyling()); conservationform.settitlestyle(formheaderstyle()); conservationform.setmenustyle(formfooterstyle()); image icon, emoticonicon, attachmenticon; button emoticonbtn, attachmentbtn; int strlen = (int) (display.getinstance().getdisplaywidth()/16); final container emoticonpanel = new container(new flowlayout()); final container msgpane = new container(new boxlayout(boxlayout.y_axis)); container inputpane = new container(new flowlayout()); style inputpaneustyle = new style(); style inputpanesstyle = new style(); inputpaneustyle.setmargin(0,0,0,0); inputpaneustyle.setbgcolor(util.guiclass.buttonbgcolor); inputpaneustyle.setfgcolor(util.guiclass.buttonbgcolor); inputpanesstyle.setmargin(0,0,2,2); inputpanesstyle.setbgcolor(util.guiclass.buttonbgcolor); inputpanesstyle.setfgcolor(util.guiclass.buttonbgcolor); inputpane.setunselectedstyle(inputpaneustyle); inputpane.setselectedstyle(inputpanesstyle); inputpane.setpreferredh(60); try { currentconversation.messages= datas.getmessage(currentconversation.name); } catch (recordstoreexception ex) { } try { icon = image.createimage("/res/smile.png").scaled(14, 14); attachmenticon = image.createimage("/res/attach-icon.png").scaled(14, 14); }catch(java.io.ioexception e){ icon = attachmenticon = null; } emoticonbtn = new button(icon); attachmentbtn = new button(attachmenticon); attachmentbtn.addactionlistener(new actionlistener() { public void actionperformed(actionevent ae) { showfiles(); } }); vector msgs = currentconversation.messages; message msg; container mycontainer = null; emotions em = new emotions(); (int i=0; i<msgs.size(); i++) { msg = (message) msgs.elementat(i); string msgstring=""; if(msg.from.equals(currentconversation.name)){ mycontainer = new container(new flowlayout()); style mycontainerustyle = new style(); style mycontainersstyle = new style(); mycontainerustyle.setbgcolor(0x75b0d2); mycontainerustyle.setfgcolor(0x75b0d2); mycontainerustyle.setpadding(1, 1, 1, 1); mycontainerustyle.setmargin(5,5, 40, 5); mycontainerustyle.setborder(border.createroundborder(12, 5, 0x75b0d2)); mycontainersstyle.setbgcolor(0x007bc1); mycontainersstyle.setfgcolor(0x007bc1); mycontainersstyle.setpadding(1, 1, 1, 1); mycontainersstyle.setmargin(5,5, 40, 5); mycontainersstyle.setbgtransparency(150); mycontainersstyle.setborder(border.createroundborder(12, 5, 0x75b0d2)); mycontainer.setunselectedstyle(mycontainerustyle); mycontainer.setselectedstyle(mycontainersstyle); msgstring = msg.gettext().trim(); float count = msgstring.length(); count = (count/strlen); int pheight = (int)(30*math.ceil(count)); mycontainer.setpreferredh(pheight); int pwidth = (int)((3/4)*display.getinstance().getdisplaywidth()); mycontainer.setpreferredw(pwidth); string substr; int index = -1; (int j = 0; j < emotions.emoticonkeys.length; j++) { index = msgstring.indexof(emotions.emoticonkeys[j]); if(index>-1) break; } if(index>-1){ int k = 0; string emotiid = ""; while(index>-1){ int currentindex = -1; (int j = 0; j < emotions.emoticonkeys.length; j++) { index = msgstring.indexof(emotions.emoticonkeys[j]); if(index>-1){ if(currentindex<0){ currentindex = index; } if(index<=currentindex){ currentindex = index; emotiid = emotions.emoticonkeys[j]; } } } substr = msgstring.substring(0, currentindex); msgstring = msgstring.substring(currentindex+emotiid.length()); label lb; label emoticonlabel = new label(""); try { emoticonicon = image.createimage((string) util.emotions.emoticonlist.get(emotiid)).scaled(14, 14); emoticonlabel = new label(emoticonicon); } catch (ioexception ex) { } emoticonlabel.getstyle().setmargin(0, 0, 0, 0); emoticonlabel.getstyle().setbgcolor(0x75b0d2); if(substr.length()>emotiid.length()){ int strlength = substr.length(); while(strlength>0){ if(substr.length()>strlen){ lb= new label(substr.substring(0, strlen)); substr = substr.substring(strlen); strlength = substr.length(); }else { lb= new label(substr.substring(0)); strlength = 0; } lb.getstyle().setbgcolor(0x75b0d2); lb.getstyle().setmargin(0, 0, 0, 0); mycontainer.addcomponent(lb); } } mycontainer.addcomponent(emoticonlabel); if(msgstring.length()!= 0){ (int j = 0; j < emotions.emoticonkeys.length; j++) { try{ index = msgstring.indexof(emotions.emoticonkeys[j]); }catch (exception ex){ } if(index>-1){ break; } } if(index<0 && msgstring.length()>(emotiid.length()-1)){ int strlength = msgstring.length(); while(strlength>0){ if(msgstring.length()>strlen){ lb= new label(msgstring.substring(0, strlen)); substr = msgstring.substring(strlen); strlength = msgstring.length(); }else { lb= new label(msgstring.substring(0)); strlength = 0; } lb.getstyle().setmargin(0, 0, 0, 0); lb.getstyle().setbgcolor(0x75b0d2); mycontainer.addcomponent(lb); } } }else { index = -1; } } }else { int strlength = msgstring.length(); while(strlength>-1){ label lb; if(msgstring.length()>strlen){ lb= new label(msgstring.substring(0, strlen)); msgstring = msgstring.substring(strlen); strlength = msgstring.length(); }else { lb= new label(msgstring.substring(0)); strlength = -1; } lb.getstyle().setmargin(0, 0, 0, 0); lb.getstyle().setbgcolor(0x75b0d2); mycontainer.addcomponent(lb); } } msgpane.addcomponent(mycontainer); msgpane.setnextfocusdown(mycontainer); msgpane.setnextfocusup(mycontainer); }else{ mycontainer = new container(new flowlayout()); style mycontainerustyle = new style(); style mycontainersstyle = new style(); mycontainerustyle.setbgcolor(0x6d96ad); mycontainerustyle.setfgcolor(0x6d96ad); mycontainerustyle.setpadding(1, 1, 1, 1); mycontainerustyle.setmargin(5,5, 5, 40); mycontainerustyle.setborder(border.createroundborder(12, 5, 0x6d96ad)); mycontainersstyle.setbgcolor(0x6d96ad); mycontainersstyle.setfgcolor(0x6d96ad); mycontainersstyle.setpadding(1, 1, 1, 1); mycontainersstyle.setmargin(5,5, 5, 40); mycontainersstyle.setbgtransparency(150); mycontainersstyle.setborder(border.createroundborder(12, 5, 0x6d96ad)); mycontainer.setunselectedstyle(mycontainerustyle); mycontainer.setselectedstyle(mycontainersstyle); msgstring = msg.gettext().trim(); float count = msgstring.length(); count = (count/strlen); int pheight = (int)(30*math.ceil(count)); mycontainer.setpreferredh(pheight); int pwidth = (int)((3/4)*display.getinstance().getdisplaywidth()); mycontainer.setpreferredw(pwidth); string substr; int index = -1; (int j = 0; j < emotions.emoticonkeys.length; j++) { index = msgstring.indexof(emotions.emoticonkeys[j]); if(index>-1) break; } if(index>-1){ string emotiid = ""; while(index>-1){ int currentindex = -1; (int j = 0; j < emotions.emoticonkeys.length; j++) { index = msgstring.indexof(emotions.emoticonkeys[j]); if(index>-1){ if(currentindex<0){ currentindex = index; } if(index<=currentindex){ currentindex = index; emotiid = emotions.emoticonkeys[j]; } } } substr = msgstring.substring(0, currentindex); msgstring = msgstring.substring(currentindex+emotiid.length()); label lb; label emoticonlabel = new label(""); try { emoticonicon = image.createimage((string) util.emotions.emoticonlist.get(emotiid)).scaled(14, 14); emoticonlabel = new label(emoticonicon); } catch (ioexception ex) { } emoticonlabel.getstyle().setbgcolor(0x6d96ad); if(substr.length()>emotiid.length()){ int strlength = substr.length(); while(strlength>0){ if(substr.length()>strlen){ lb= new label(substr.substring(0,strlen)); substr = substr.substring(strlen); strlength = substr.length(); }else { lb= new label(substr.substring(0)); strlength = 0; } lb.getstyle().setbgcolor(0x6d96ad); lb.getstyle().setmargin(0, 0, 0, 0); mycontainer.addcomponent(lb); } } emoticonlabel.getstyle().setmargin(0, 0, 0, 0); mycontainer.addcomponent(emoticonlabel); if(msgstring.length()!= 0){ (int j = 0; j < emotions.emoticonkeys.length; j++) { try{ index = msgstring.indexof(emotions.emoticonkeys[j]); }catch (exception ex){ } if(index>-1){ break; } } if(index<0 && msgstring.length()>(emotiid.length()-1)){ int strlength = msgstring.length(); while(strlength>0){ if(msgstring.length()>strlen){ lb= new label(msgstring.substring(0, strlen)); substr = msgstring.substring(strlen); strlength = msgstring.length(); }else { lb= new label(msgstring.substring(0)); strlength = 0; } lb.getstyle().setmargin(0, 0, 0, 0); lb.getstyle().setbgcolor(0x6d96ad); mycontainer.addcomponent(lb); } } }else { index = -1; } } }else { int strlength = msgstring.length(); while(strlength>-1){ label lb; if(msgstring.length()>strlen){ lb= new label(msgstring.substring(0, strlen)); msgstring = msgstring.substring(strlen); strlength = msgstring.length(); }else { lb= new label(msgstring.substring(0)); strlength = -1; } lb.getstyle().setmargin(0, 0, 0, 0); lb.getstyle().setbgcolor(0x6d96ad); mycontainer.addcomponent(lb); } } msgpane.addcomponent(mycontainer); msgpane.setnextfocusdown(mycontainer); msgpane.setnextfocusup(mycontainer); } } if(sendfilestatus.containskey("sendingstatus")){ container filealertcontainer = new container(new boxlayout(2)); style filealertcontainerstyle = new style(); filealertcontainerstyle.setbgcolor(0x007bc1); filealertcontainerstyle.setfgcolor(0x007bc1); filealertcontainer.setunselectedstyle(filealertcontainerstyle); filealertcontainer.setselectedstyle(filealertcontainerstyle); filealertcontainer.getstyle().setborder(border.createroundborder(12, 5, 0x007bc1)); filealertcontainer.getstyle().setpadding(1, 1, 1, 1); filealertcontainer.getstyle().setmargin(5,5, 5, 40); mylabel filesendalert = new mylabel(mymidlet.setsrfilename+" has been sent"); filesendalert.getstyle().setbgcolor(0x007bc1); filesendalert.getstyle().setmargin(0, 0, 0, 0); filealertcontainer.addcomponent(filesendalert); msgpane.addcomponent(filealertcontainer); sendfilestatus.remove("sendingstatus"); conservationform.repaint(); }else if(sendfilestatus.containskey("receivingstatus")){ container filealertcontainer = new container(new boxlayout(2)); style filealertcontainerstyle = new style(); filealertcontainerstyle.setbgcolor(0x007bc1); filealertcontainerstyle.setfgcolor(0x007bc1); filealertcontainer.setunselectedstyle(filealertcontainerstyle); filealertcontainer.setselectedstyle(filealertcontainerstyle); filealertcontainer.getstyle().setborder(border.createroundborder(12, 5, 0x007bc1)); filealertcontainer.getstyle().setpadding(1, 1, 1, 1); filealertcontainer.getstyle().setmargin(5,5, 40, 5); mylabel filesendalert = new mylabel(mymidlet.setsrfilename+" has received"); filesendalert.getstyle().setbgcolor(0x007bc1); filesendalert.getstyle().setmargin(0, 0, 0, 0); filealertcontainer.addcomponent(filesendalert); msgpane.addcomponent(filealertcontainer); sendfilestatus.remove("receivingstatus"); conservationform.repaint(); } style emticonsusstyle = new style(); emticonsusstyle.setborder(null); emticonsusstyle.setborder(null); emticonsusstyle.setbgtransparency(0); style emtbtnustyle = new style(); emtbtnustyle.setborder(null); emtbtnustyle.setborder(null); emtbtnustyle.setbgtransparency(0); emtbtnustyle.setmargin(2, 2, 75, 0); emoticonbtn.setunselectedstyle(emtbtnustyle); style attchmentbtnustyle = new style(); attchmentbtnustyle.setborder(null); attchmentbtnustyle.setborder(null); attchmentbtnustyle.setbgtransparency(0); attchmentbtnustyle.setmargin(2, 2, 5, 0); attachmentbtn.setunselectedstyle(attchmentbtnustyle); style emticonssstyle = new style(); emticonssstyle.setborder(border.createroundborder(5, 12, 0xffffff)); emticonssstyle.setbgtransparency(100); style emtbtnsstyle = new style(); emtbtnsstyle.setborder(border.createroundborder(5, 12, 0xffffff)); emtbtnsstyle.setbgtransparency(100); emtbtnsstyle.setmargin(2, 2, 75, 0); emoticonbtn.setselectedstyle(emtbtnsstyle); style attachmentsstyle = new style(); attachmentsstyle.setborder(border.createroundborder(5, 12, 0xffffff)); attachmentsstyle.setbgtransparency(100); attachmentsstyle.setmargin(2, 2, 5, 0); attachmentbtn.setselectedstyle(attachmentsstyle); tf = new textfield("", 40); tf.settext(msgtext); string[] defaultinputmodeorder = {"abc", "abc", "abc", "123"}; tf.setinputmodeorder(defaultinputmodeorder); tf.setinputmode(defaultinputmodeorder[0]); tf.setreplacemenu(false); tf.setpreferredw(220); tf.setpreferredh(25); style inputustyle = new style(); inputustyle.setbgcolor(0xffffff); inputustyle.setfgcolor(0x181818); inputustyle.setbgtransparency(100); inputustyle.setborder(border.createroundborder(12, 5, 0xffffff)); tf.setunselectedstyle(inputustyle); style inputsstyle = new style(); inputsstyle.setbgcolor(0xffffff); inputsstyle.setfgcolor(0x181818); inputsstyle.setborder(border.createroundborder(12, 5, 0x4775d1)); tf.setselectedstyle(inputsstyle); inputpane.addcomponent(tf); inputpane.addcomponent(emoticonbtn); inputpane.addcomponent(attachmentbtn); button file = new button(icon); file.addactionlistener(new actionlistener() { public void actionperformed(actionevent ae) { showfiles(); } }); for(m = 0; m<emotions.emoticonkeys.length; m++){ try{ emoticonicon = image.createimage((string) util.emotions.emoticonlist.get(emotions.emoticonkeys[m])); button emtoticons = new button(emoticonicon); emtoticons.setunselectedstyle(emticonsusstyle); emtoticons.setselectedstyle(emticonssstyle); emtoticons.setselectcommandtext(emotions.emoticonkeys[m]); emoticonpanel.addcomponent(emtoticons); emtoticons.addactionlistener(new actionlistener(){ public void actionperformed(actionevent evt){ button bt=(button)evt.getsource(); conservationform.removecomponent(msgpane); tf.settext(tf.gettext()+bt.getselectcommandtext()); conservationform.removecomponent(emoticonpanel); conservationform.addcomponent(borderlayout.center, msgpane); ishide = false; conservationform.repaint(); } }); }catch (exception ex){ } } emoticonbtn.addactionlistener(new actionlistener(){ public void actionperformed(actionevent evt){ if(!ishide){ conservationform.removecomponent(msgpane); conservationform.addcomponent(borderlayout.center, emoticonpanel); conservationform.repaint(); ishide = true; }else { conservationform.removecomponent(emoticonpanel); conservationform.addcomponent(borderlayout.center, msgpane); conservationform.repaint(); ishide = false; } conservationform.repaint(); } }); if (cananswer) {`enter code here` infopool.put("text2send", tf); if(ishide){ conservationform.removecomponent(emoticonpanel); ishide = false; } msgpane.setscrollable(true); msgpane.setnextfocusup(mycontainer); msgpane.setnextfocusdown(mycontainer); tf.setnextfocusup(mycontainer); tf.setnextfocusdown(emoticonbtn); emoticonbtn.setnextfocusleft(tf); emoticonbtn.setnextfocusright(attachmentbtn); emoticonbtn.setnextfocusup(tf); conservationform.addfocuslistener(new focuslistener() { public void focusgained(component cmpnt) { } public void focuslost(component cmpnt) { } }); attachmentbtn.setnextfocusleft(emoticonbtn); attachmentbtn.setnextfocusright(tf); attachmentbtn.setnextfocusup(tf); conservationform.addcomponent(borderlayout.center, msgpane); conservationform.addcomponent(borderlayout.south,inputpane); conservationform.addcommand(registercommand("send", "send", 0, 0)); if(mymsg.length()==0){ conservationform.addcommand(registercommand("back", "back",2, 2)); }else if(mymsg.length()==1){ registrationform.addcommand(registercommand("clear", "clear", 3, 3)); } conservationform.addcommandlistener((actionlistener) this); conservationform.show(); } ![[1]:](https://i.stack.imgur.com/wa5zq.png)
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