qt delay on off pixmap -


hy qt master..

i wanna make label (pixmap) on off on off on , soon, how can that??

i have try use code :

sleeper::sleep(2);     ui->label->setpixmap(qpixmap("c:/users/evan/pictures/new folder/85.png"));     sleeper::sleep(2);     ui->label->setpixmap(qpixmap("c:/users/evan/pictures/new folder/87.png"));     sleeper::sleep(2);     ui->label->setpixmap(qpixmap("c:/users/evan/pictures/new folder/85.png"));     sleeper::sleep(2);     ui->label->setpixmap(qpixmap("c:/users/evan/pictures/new folder/87.png"));

that not work? how can solved that? all

this problem :

if(i==4)         {             qtimer *timer1 = new qtimer(this);             connect(timer1, signal(timeout()), this, slot(ontimer()));             timer1->start(1000);             blink=true;             port->write(send);         } else if(i==5)         {             ui->label->setpixmap(qpixmap("../../picture/green.png"));             port->write(send);         }

............................................

void traffic1::ontimer() {          ui->label->setpixmap(qpixmap(blink ? "../../picture/dark.png" : "../../picture/yellow.png"));         blink = !blink;  }

when i=4, qtimer run when i=5 qtimer still active.

first add boolean member variable bool blink;, create qtimer , connect it's timeout() signal slot function below:

// constructor: yourclass::yourclass() {        qtimer *timer = new qtimer(this);        connect(timer, signal(timeout()), this, slot(ontimer()));        timer->start(1000);        blink = false; }

........

void yourclass::ontimer() {   ui->label->setpixmap(qpixmap(blink ? "c:/users/evan/pictures/new folder/85.png" : "c:/users/evan/pictures/new folder/87.png"));   blink = !blink; }

edit: if want control timer, should declare in header of class first

class yourclass {   qtimer *timer;    ... };

and when want create it:

yourclass::yourclass() {        timer = new qtimer(this);        connect(timer, signal(timeout()), this, slot(ontimer()));        timer->start(1000);        blink = false; }

for stopping it:

  timer->stop();

Comments

Post a Comment

Popular posts from this blog

java - Play! framework 2.0: How to display multiple image? -

i need display gallery of photos. here template: @(photos: list[photo]) @title = { <bold>gallery</bold> } @main(title,"photo"){ <ul class="thumbnails"> @for(photo <- photos) { <li class="span3"> <a href="#" class="thumbnail"> <img src="@photo.path" alt=""> </a> </li> } </ul> } and here controller method: public static result getphotos() { return ok(views.html.photo.gallery.render(photo.get())); } and here photo bean : @entity public class photo extends model { @id public long id; @required public string label; public string path; public photo(string path, string label) { this.path = path; this.label = label; } private static finder<long, photo> find = new finder<long, photo>( long.class, photo.class); public static list<phot...
Read more

gmail - Is there any documentation for read-only access to the Google Contacts API? -

i want read-only access user's google contacts. there stackoverflow member wanted this, , received following answer : yes, there is, use https://www.googleapis.com/auth/contacts.readonly scope , "view contacts". this exchange reference read-only access google contacts can find using google. simply using access token obtained attempt read usual google contacts api (i.e. https://www.google.com/m8/feeds ) fails insufficient permissions. similarly, using google contacts api on new target fails 404 errors (for example https://www.googleapis.com/auth/contacts.readonly/default/full ). is there documentation anywhere on how use api, or permissible way access google contacts api full read-write access?
Read more

php - Controller/JToolBar not working in Joomla 2.5 -

relevant code: jtoolbarhelper::custom('savecategories', 'save', '', 'save', false, false); ... <input type="hidden" name="controller" value="easyblogcontroller"> according can dig docs , own previous questions, should call savecategories() function in easyblogcontroller . i've tried setting value easyblog , easyblog.php (file name) current easyblogcontroller (class name). clicking on save button refreshes page. not redirect, echo or var_dump test code put in savecategories() function. var_dump ing jrequest::getvar('controller') , 'task' return correct values. creating controller object , using $controller->execute('task'); works. the values going depend on location of controller trying call, , have couple options here. typically there controller in base folder of component (likely components/com_easyblog) in file called controller.php , class name inside ...
Read more