Second Life source Analysis (90) Llscrolllistctrl Implementation list display

In the Second Life UI display, scrolling list also uses a lot of, because of the case of multiple list selection, using a scrolling list is often used to use the interface is more convenient and practical. As in the following login interface, there are controls that use the scrolling list:   From the top right you can see a scrolling list to display different servers, which makes it easy for users to select different server logins. So how is this scrolling list implemented? Then we analyze the code for this class, and the inheritance of the class is as follows: #001  class llscrolllistctrl:public Lluictrl, public Lleditmenuhandler, #002       Public llctrllistinterface, public llctrlscrollinterface   its display code is as follows: #001  void Llscrolllistctrl::d Raw () #002  {  Determine if the control is visible and visible. #003      if (getvisible ()) #004      {  To determine whether a sort is required. #005         //If user specifies sort, make sure it is maintained #006    &NB sp;     if (needssorting () &&!issorted ()) #007           {#008              sortitems () #009          } #010     Whether scroll bars need to be displayed. #011          if (mneedsscroll) #012 &NBsp        {#013              Scrolltoshowselected (); #014              mneedsscroll = FALSE; #015         } #016          llrect background ( 0, GetRect (), GetHeight (), GetRect (). GetWidth (), 0);   Displays the background of the scrolling list. #017         //Draw background #018          if (mbackgroundvisible) #019          {#020               llglsnotexture no_texture; #021              GGL.COLOR4FV (getenabled)? MBgWriteableColor.mV:mBgReadOnlyColor.mV); #022              gl_rect_2d (background); #023         } #024     Update display column widths. #025          if (mcolumnsdirty) #026          { #027              updatecolumns (); #028              mcolumnsdirty = FALSE; #029         } #030     to begin displaying all list elements. #031          drawitems (); #032     Whether there is a border display, if it is displayed. #033          if (mborder) #034          {#035              Mborder->setkeyboardfocushighlight ( Gfocusmgr.getkeyboardfocus () = = this); #036         } #037     calls the display function of the base class. #038          Lluictrl::d Raw (); #039     } #040 &nbsp} #041     through the above functions, you can see the list shown above, and next time to seeHow to add a list item and display the code for the list item in detail.     Second Life development package provided, the price of 198 yuan/set (including postage). includes the following contents: 1. "Second Life source Analysis" PDF document. 2. Second Life client source program. 3. 2G U disk, mainly used to copy source programs and related development tools.   provide three months of technical services, provides quick compilation instructions, such as remote compile operations via QQ. provide a complete book reference.   Contact Method: qq:9073204 msn:caimouse1976@sina.com email:          ccaimouse@gmail.com