Java delay between paint();

[ale626]

i have to simulate a phone, and the part im having trouble on is painting the image when it turns on.
so i click the power button then a welcome screen comes on after a 3 second delay the image should change to the menu image.

powerButton.addActionListener(new ActionListener() {              
         public void actionPerformed(ActionEvent e) {
             if (powerButton.isSelected()) {
                 try{ //grabs the image and has exception if there is no file.
                     image = ImageIO.read(new File("phoneWelcome.png"));
                     repaint();                     
                 } catch (IOException ev){
                     System.out.print("Missing Picture");
                 }
                 wait.manySec(3); //class used to delay.
                 try{ //grabs the image and has exception if there is no file.
                     image = ImageIO.read(new File("phoneMenu.png"));
                     repaint();                     
                 } catch (IOException ev){
                     System.out.print("Missing Picture");
                 }
                 
             } else {
                 System.out.println("button not selected");
                 try{ //grabs the image and has exception if there is no file.
                     image = ImageIO.read(new File("Phone2.png"));
                     repaint();
                 } catch (IOException ex){
                     System.out.print("Missing Picture");
                 }
             }
         }        
        });

thats the part of my code i need help with. it always goes straight to my phoneMenu.png image and skips the welcome

[DarrylBurke]

:yawn:

Don't call sleep(...) directly or indirectly on the EDT. Use a Timer.
Lesson: Concurrency in Swing (The Java™ Tutorials > Creating a GUI With JFC/Swing)
How to Use Swing Timers (The Java™ Tutorials > Creating a GUI With JFC/Swing > Using Other Swing Features)

db

[ale626]

mind giving me a hand on swing timers, not the code but advice on how to implement it.
My professor lectures off wikipedia for my gui class -.-
so im struggling to read the tutorials on oracle.

[JosAH]

Swing uses one single thread (the EDT thread == Event Dispatch Thread) for all its painting and event dispatching (such as button presses handling); you actionPerformed( ... ) method runs in that thread and if your method sleeps it makes the EDT sleep and you don't want that because it has work to do; your method has to create another thread that should sleep a bit and make the EDT update the display a bit later. Timers can do that job.

kind regards,

Jos

[DarrylBurke]

mind giving me a hand on swing timers, not the code but advice on how to implement it.

I gave you the links to two sections of the Swing tutorial. If there's anything there you couldn't grasp, quote it and ask a specific question.

db

[Fubarable]

mind giving me a hand on swing timers, not the code but advice on how to implement it.
My professor lectures off wikipedia for my gui class -.-
so im struggling to read the tutorials on oracle.

Sure, what part of the complete tutorial do you want us to re-write for you?

But seriously, please ask a specific answerable question.

[ale626]

Sorry about that, was just a little frustrated but i do appreciate the help.
I did get it to work, using the other oracle page Timer (Java Platform SE 7 )

Here is my code

powerButton.addActionListener(new ActionListener() {              
         public void actionPerformed(ActionEvent e) {
             if (powerButton.isSelected()) {
                  
                 try{ //grabs the image and has exception if there is no file.
                     image = ImageIO.read(new File("phoneWelcome.png"));
                     repaint();
                     
                 } catch (IOException ev){
                     System.out.print("Missing Picture");
                 }
                 ActionListener taskPerformer = new ActionListener() {
                      public void actionPerformed(ActionEvent evt) {
                          try{ //grabs the image and has exception if there is no file.
                              image = ImageIO.read(new File("phoneMenu.png"));
                              repaint();                              
                          } catch (IOException ev){
                              System.out.print("Missing Picture");
                          }
                      }
                  };
                  Timer time = new Timer(3000, taskPerformer);
                  time.start();
                  time.setRepeats(false);
             } else {
                 System.out.println("button not selected");
                 try{ //grabs the image and has exception if there is no file.
                     image = ImageIO.read(new File("Phone2.png"));
                     repaint();
                 } catch (IOException ex){
                     System.out.print("Missing Picture");
                 }
             }
         }        
        });

I do have a couple questions, why does thread.sleep() not give the same results as the timer?
i figure it has to do with threads, but i dont even know what they are.
i looked around, and even parts of oracle site are iffy, like so: A thread is a thread of execution in a program.

also any suggestions on how i can make a lot of buttons appear along with my new image after the 3 second delay?
would just creating them inside the actionPreformed method work? or is there a more standard way of doing it?

[PRW56]

also any suggestions on how i can make a lot of buttons appear along with my new image after the 3 second delay?
would just creating them inside the actionPreformed method work? or is there a more standard way of doing it?

dude if you make them at the beginning of the class, or just declare them, you can add them at any time, but if I were you I would use card layout for the phone screen, then you can add and arrange the buttons at the beginning, then switch to the new screen.

[DarrylBurke]

why does thread.sleep() not give the same results as the timer? I figure it has to do with threads, but i dont even know what they are.

Lesson: Concurrency (The Java™ Tutorials > Essential Classes)
Threads and Swing
The Last Word in Swing Threads
Will the real Swing Single Threading Rule please stand up? « bitguru blog

Use a SwingWorker to run any time consuming task in the background. That's what the class was designed for.

db