winapi - How to show the progressbar using threading functionality in win32? -

-

in application have simple module read files process take few seconds..so thought of displaying progress bar(using worker thread) while files in progress.i have created thread (code shown below) , designed dialog window progress control.i used function mythreadfunction below display progressbar shows 1 time , disappears,i not sure how make work.i tried best inspite of fact new threading.please me friends.

reading files void readmyfiles() {     for(int = 0; < filecount ; filecount++)     {        cwinthread* mythread = afxbeginthread((afx_threadproc)mythreadfunction,null);     tempstate = *(checkstate + index);     if(tempcheckstate == nocheckbox)     {         //my operations     }     else//checked or unchecked     {         //myoperation     }     mythread->postthreadmessage(wm_quit,null,null);     } }  thread functions uint mythreadfunction(lparam lparam) {     hwnd dialogwnd = createwindowex(0,wc_dialog,l"proccessing...",ws_overlappedwindow|ws_visible,                     600,300,280,120,null,null,null,null);     hwnd pbarwnd =  createwindowex(null,progress_class,null,ws_child|ws_visible|pbs_marquee,40,20,200,20,                             dialogwnd,(hmenu)idd_progress,null,null);      msg msg;      postmessage( pbarwnd, pbm_setrange, 0, makelparam( 0, 100 ) );     postmessage(pbarwnd,pbm_setpos,0,0);     while(peekmessage(&msg,null,null,null,pm_noremove))     {         if(msg.message == wm_quit)         {             destroywindow(dialogwnd);             return 1;         }         afxgetthread()->pumpmessage();         sleep(40);     }     return 1;   }

turn around , put blocking behavior in worker thread.

its common mistake, not worth creating multiple gui threads in single process.

window messages posted thread queues :- means that, @ point, child, or popup window, going try , communicate blocked window on thread. if user unexpectedly trying resize or move popup window - means both windows again blocked on time consuming process complete.


Comments

Post a Comment

Popular posts from this blog

javascript - Enclosure Memory Copies -

-
function myclass() { //lots , lots of vars , code here. this.bar = function() { //do numerous enclosed myclass vars } this.foo = function() { alert('hello'); //don't enclosed variables. } } each instance of myclass gets own copy of bar , foo, why prototyped methods use less memory. however, know more memory use of inner methods. it seems obvious me (1) below must true. agree? not distinct myclass instances have own distinct copies of bar, must have own distinct copies of myclass enclosure. (or else how bar method keep myclass variables straight on per instance basis?) now (2) question i'm after. since inner foo method doesn't use in myclass enclosure natural qustion is: javascript smart enough not keep myclass enclosure in memory use of foo? this depend entirely on implementation not language. naive implementations keep far more around others. answer true e.g. v8 (chrome's js engine) may not true spider...
Read more

php - Replacing tags in braces, even nested tags, with regex -

-
example preg_replace('/\{[a-za-z.,\(\)0-9]+\}/', 'replaced', 'lorem ipsum dolor sit {tag1({tag2()})}, consectetur adipiscing elit.'); the result: lorem ipsum dolor sit {tag1(replaced)}, consectetur adipiscing elit. question as can see "tag2" has been replaced, want replace "tag1" know how can this? (in cases might this: {tag1({tag2({tag3()})})}) , on.) btw using preg_replace_callback, easier show preg_replace here site can test code: http://www.spaweditor.com/scripts/regex/index.php you need add curly braces character set. here's pattern used: /\{[a-za-z.,\(\)\{\}0-9]+\}/ and here result: "lorem ipsum dolor sit replaced, consectetur adipiscing elit."
Read more