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Set Delay Timer

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  • J.HilkJ J.Hilk

    @Yrandom You got a lot of good advise from the others. I'll try to add to that.
    If you don't wan't do rewrite your code too much, you can change your fuction to something like this.

    void VerschiebeSpiel::buttonClicked(QWidget* _button){
        QPushButton* b = dynamic_cast<QPushButton*>(_button);  
        int index = layout->indexOf(_button);   
        int row, col,ax,bx;
        
        if(index != -1){                                
            layout->getItemPosition(index,&row,&col,&ax,&bx);
        }
    
        if(b){//check if valid cast
            b->setStyleSheet("background-color:green");
            //Timer + Lambda-function to reset the button after 1000 msec
            QTimer::singleShot(1000,this,[=]{b->setStyleSheet("background-color:red");});
        }
    }       
    
    Y Offline
    Y Offline
    Yrandom
    wrote on last edited by Yrandom
    #8

    @J.Hilk

    thx for this example
    it works great.

    also just mention: i found out other solution for that

    using processevents and currenttime
    but i want to unterstand how this part work

    QCoreApplication::processEvents( QEventLoop::AllEvents, 100 );
    

    What is the 100(maxtime) mean ? because i just need to process the Event again (Loop all Event) and the current time will increase automatically.
    I dont need to put 100 as Parameter and it still work

    Thx all for the answer

    
    // Delay time for button color
    void ss::delay(int millisecondsToWait )
    {
        QTime dieTime = QTime::currentTime().addMSecs( millisecondsToWait );
        while( QTime::currentTime() < dieTime )
        {
            QCoreApplication::processEvents( QEventLoop::AllEvents, 100 );
        }
    }
    
    jsulmJ J.HilkJ 2 Replies Last reply
    0
    • Y Yrandom

      @J.Hilk

      thx for this example
      it works great.

      also just mention: i found out other solution for that

      using processevents and currenttime
      but i want to unterstand how this part work

      QCoreApplication::processEvents( QEventLoop::AllEvents, 100 );
      

      What is the 100(maxtime) mean ? because i just need to process the Event again (Loop all Event) and the current time will increase automatically.
      I dont need to put 100 as Parameter and it still work

      Thx all for the answer

      
      // Delay time for button color
      void ss::delay(int millisecondsToWait )
      {
          QTime dieTime = QTime::currentTime().addMSecs( millisecondsToWait );
          while( QTime::currentTime() < dieTime )
          {
              QCoreApplication::processEvents( QEventLoop::AllEvents, 100 );
          }
      }
      
      jsulmJ Offline
      jsulmJ Offline
      jsulm
      Lifetime Qt Champion
      wrote on last edited by jsulm
      #9

      @Yrandom said in Set Delay Timer:

      QCoreApplication::processEvents

      Check documentation http://doc.qt.io/qt-5/qcoreapplication.html#processEvents-1
      "Processes pending events for the calling thread for maxtime milliseconds or until there are no more events to process, whichever is shorter."
      Keep in mind that your solution isn't nice from design point of view and will consume a lot of CPU power.

      https://forum.qt.io/topic/113070/qt-code-of-conduct

      1 Reply Last reply
      1
      • Y Yrandom

        This post is deleted!

        VRoninV Offline
        VRoninV Offline
        VRonin
        wrote on last edited by
        #10

        @Yrandom said in Set Delay Timer:

        VerschiebeSpiel.cpp.cc: In member function 'void erschiebeSpiel::buttonClicked(QWidget*)':

        That's not where you should put the connect. my code snippet should go just after you create the button (in the constructor?)

        while( QTime::currentTime() < dieTime )
        {
        QCoreApplication::processEvents( QEventLoop::AllEvents, 100 );
        }

        This is just bad design. you are blocking the main thread and forcing the event loop to kinda keep the UI responsive. Nasty

        "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
        ~Napoleon Bonaparte

        On a crusade to banish setIndexWidget() from the holy land of Qt

        1 Reply Last reply
        1
        • Y Yrandom

          @J.Hilk

          thx for this example
          it works great.

          also just mention: i found out other solution for that

          using processevents and currenttime
          but i want to unterstand how this part work

          QCoreApplication::processEvents( QEventLoop::AllEvents, 100 );
          

          What is the 100(maxtime) mean ? because i just need to process the Event again (Loop all Event) and the current time will increase automatically.
          I dont need to put 100 as Parameter and it still work

          Thx all for the answer

          
          // Delay time for button color
          void ss::delay(int millisecondsToWait )
          {
              QTime dieTime = QTime::currentTime().addMSecs( millisecondsToWait );
              while( QTime::currentTime() < dieTime )
              {
                  QCoreApplication::processEvents( QEventLoop::AllEvents, 100 );
              }
          }
          
          J.HilkJ Offline
          J.HilkJ Offline
          J.Hilk
          Moderators
          wrote on last edited by
          #11

          @Yrandom

          Usually during a while loop, all other tasks are suspendet until the loop or more precisely the function returns. That includes the paint/repaint event that is triggered by setStyleSheet().

          QCoreApplication::processEvents() is an uncomely way to tell your app, "That with the function, do whatever else is qued".
          The Int value you pass to processEvents is a max value in -I believe -ms, you give other Processes to finish their stuff, after that time your code after the call gets processed again.

          a While loop now is calling that every eventloop-cycle

          My advice, don't use it, if you have other options.


          Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


          Q: What's that?
          A: It's blue light.
          Q: What does it do?
          A: It turns blue.

          1 Reply Last reply
          1
          • M Offline
            M Offline
            mpergand
            wrote on last edited by
            #12

            A wait function like this:

            void wait(float sec)
            {
                QElapsedTimer timer;
                timer.start();
            
                while(! timer.hasExpired(sec*1000))
                    QCoreApplication::processEvents();
            }
            

            allows you to simpy do that:

            b->setStyleSheet("background-color:green");
            wait(0.3);
            b->setStyleSheet("background-color:red");
            

            Pretty and clean isn't it ?

            J.HilkJ VRoninV 2 Replies Last reply
            0
            • M mpergand

              A wait function like this:

              void wait(float sec)
              {
                  QElapsedTimer timer;
                  timer.start();
              
                  while(! timer.hasExpired(sec*1000))
                      QCoreApplication::processEvents();
              }
              

              allows you to simpy do that:

              b->setStyleSheet("background-color:green");
              wait(0.3);
              b->setStyleSheet("background-color:red");
              

              Pretty and clean isn't it ?

              J.HilkJ Offline
              J.HilkJ Offline
              J.Hilk
              Moderators
              wrote on last edited by
              #13

              @mpergand said in Set Delay Timer:

              while(! timer.hasExpired(sec*1000))
                  QCoreApplication::processEvents();
              

              Pretty and clean isn't it ?

              No, it's not!

              Do not use QCoreApplication::processEvents if you can avoid it!


              Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


              Q: What's that?
              A: It's blue light.
              Q: What does it do?
              A: It turns blue.

              1 Reply Last reply
              0
              • M mpergand

                A wait function like this:

                void wait(float sec)
                {
                    QElapsedTimer timer;
                    timer.start();
                
                    while(! timer.hasExpired(sec*1000))
                        QCoreApplication::processEvents();
                }
                

                allows you to simpy do that:

                b->setStyleSheet("background-color:green");
                wait(0.3);
                b->setStyleSheet("background-color:red");
                

                Pretty and clean isn't it ?

                VRoninV Offline
                VRoninV Offline
                VRonin
                wrote on last edited by
                #14

                @mpergand said in Set Delay Timer:

                Pretty and clean isn't it ?

                No it is not. it uses 75% of one of my CPU cores for absolutely nothing

                "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
                ~Napoleon Bonaparte

                On a crusade to banish setIndexWidget() from the holy land of Qt

                M 1 Reply Last reply
                0
                • M Offline
                  M Offline
                  mpergand
                  wrote on last edited by mpergand
                  #15

                  @j.hilk Do not use QCoreApplication::processEvents if you can avoid it!

                  Why ?
                  Explain any good reason to avoid it.

                  J.HilkJ 1 Reply Last reply
                  0
                  • M mpergand

                    @j.hilk Do not use QCoreApplication::processEvents if you can avoid it!

                    Why ?
                    Explain any good reason to avoid it.

                    J.HilkJ Offline
                    J.HilkJ Offline
                    J.Hilk
                    Moderators
                    wrote on last edited by J.Hilk
                    #16

                    @mpergand said in Set Delay Timer:

                    @j.hilk Do not use QCoreApplication::processEvents if you can avoid it!

                    Why ?
                    Explain any good reason to avoid it.

                    At least used in such a loop->
                    @VRonin said in Set Delay Timer:

                    No it is not. it uses 75% of one of my CPU cores for absolutely nothing

                    Its also contrarian to the event-driven programming approach


                    Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


                    Q: What's that?
                    A: It's blue light.
                    Q: What does it do?
                    A: It turns blue.

                    1 Reply Last reply
                    0
                    • VRoninV VRonin

                      @mpergand said in Set Delay Timer:

                      Pretty and clean isn't it ?

                      No it is not. it uses 75% of one of my CPU cores for absolutely nothing

                      M Offline
                      M Offline
                      mpergand
                      wrote on last edited by
                      #17

                      @VRonin said in Set Delay Timer:

                      No it is not. it uses 75% of one of my CPU cores for absolutely nothing

                      For .3 sec not a big deal.
                      I agree, that it's should by used for short period only (< 1 sec)

                      The main drawback I know (i use the same principle on MacOS) is that it can leading to some reentrant call in some cases.

                      VRoninV 1 Reply Last reply
                      0
                      • M mpergand

                        @VRonin said in Set Delay Timer:

                        No it is not. it uses 75% of one of my CPU cores for absolutely nothing

                        For .3 sec not a big deal.
                        I agree, that it's should by used for short period only (< 1 sec)

                        The main drawback I know (i use the same principle on MacOS) is that it can leading to some reentrant call in some cases.

                        VRoninV Offline
                        VRoninV Offline
                        VRonin
                        wrote on last edited by
                        #18

                        @mpergand said in Set Delay Timer:

                        For .3 sec not a big deal.

                        It is. especially on mobile/embedded hardware. it's just bad design especially when alternatives based of QEventLoop exist (but of course use the async is ALWAYS the best design)

                        "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
                        ~Napoleon Bonaparte

                        On a crusade to banish setIndexWidget() from the holy land of Qt

                        M 1 Reply Last reply
                        3
                        • VRoninV VRonin

                          @mpergand said in Set Delay Timer:

                          For .3 sec not a big deal.

                          It is. especially on mobile/embedded hardware. it's just bad design especially when alternatives based of QEventLoop exist (but of course use the async is ALWAYS the best design)

                          M Offline
                          M Offline
                          mpergand
                          wrote on last edited by
                          #19

                          @VRonin said in Set Delay Timer:

                          It is. especially on mobile/embedded hardware. it's just bad design especially when alternatives based of QEventLoop exist (but of course use the async is ALWAYS the best design)

                          Ok, add a small QThread::sleep should do the job as well.

                          Please, can you post an example of a wait function with a QEventLoop instead.

                          1 Reply Last reply
                          0
                          • VRoninV Offline
                            VRoninV Offline
                            VRonin
                            wrote on last edited by VRonin
                            #20

                            add a small QThread::sleep should do the job as well

                            it does not, reason in link below

                            can you post an example of a wait function with a QEventLoop instead.

                            https://forum.qt.io/topic/78715/why-my-timer-is-not-emit-timeout-signal

                            "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
                            ~Napoleon Bonaparte

                            On a crusade to banish setIndexWidget() from the holy land of Qt

                            1 Reply Last reply
                            0
                            • Y Offline
                              Y Offline
                              Yrandom
                              wrote on last edited by Yrandom
                              #21

                              WOW. All the discussion :)
                              First off all, thx for the answer.
                              I have one more question to fullfill my Project. I dont want to start new Topic.

                              I have a class GameKonfiguration
                              and class MainWindow
                              and the main()

                              #include "Konfiguration.h"
                              #include "MainWindow.h"
                                  
                              int main(int argc, char *argv[]) {
                                  // initialize resources, if needed
                                  // Q_INIT_RESOURCE(resfile);
                              
                                  QApplication app(argc, argv);
                                  
                                  MainWindow *window = new MainWindow(&app);
                                  window->show();
                              
                                  Konfiguration *konfiguration = new Konfiguration(&app,window);
                                  konfiguration->show();
                              
                                  return app.exec();
                              }
                              

                              in main

                              Now I make this Programm so far, that when i start, both Windows open and i can Change configuration and the gamefield show and user can Play and actually i can quit the game via configuration. everything fine

                              Now I want to Combine the menu bar from mainwindow and use the menu bar to open my configuration window.
                              However the Problem i have is now, i cant include Header a in Header b and Header b in Header a.

                              // mainwindow Header file
                              #include "ui_MainWindow.h"
                              #include <QApplication>
                              //some Header here
                              
                              //try
                              #include "Konfiguration.h"
                              //-- not work because in Konfiguration.h i already include mainwindow.h in oder to use for the Slot etc
                              
                              
                              using namespace std;
                              
                              class MainWindow : public QMainWindow {
                                 Q_OBJECT
                              private:
                                  Ui::MainWindow widget;
                                  QApplication *app;
                                  // Try
                              Konfiguration *confi;
                                  
                              public:
                                  MainWindow(QApplication*);
                                //some function
                                  
                              signals:
                                  public slots:
                                    // function etc ........
                                     void openConfi();
                              };
                              
                               
                              
                              
                              // in mainwindow.cpp
                              // Open Game Configuration
                                  QObject::connect(widget.SpielKonfiguration,SIGNAL(triggered()),this,SLOT(openConfi()));
                                  
                                  // End Game
                                  QObject::connect(widget.SpielBeenden,SIGNAL(triggered()),app,SLOT(quit()));
                              
                               // Configuration Window
                              void MainWindow::openConfi(){
                                  // in this Slot , the configuration window should open
                              confi->show();
                              }
                              
                              

                              Konfiguration.h and cpp

                              #ifndef KONFIGURATION_H
                              #define KONFIGURATION_H
                              
                              
                              #include <QApplication>
                              #include "MainWindow.h"
                              // some Header here....
                              
                              class Konfiguration : public QDialog{
                                  Q_OBJECT
                                  
                              private:
                                  QApplication *app;
                                // here i create mainwindow pointer to Setup the gamefield
                                  MainWindow *spielFenster;    
                                     //some code here
                              public:
                                  Konfiguration(QApplication*, MainWindow*);
                                  virtual ~Konfiguration();     
                              
                                  public slots:
                                      void clearText();
                              //      void updateTextN(QString);
                              //      void updateTextM(QString);
                              };
                              
                              
                              //konfiguration.cpp
                              
                              // use the mainwindow pointer to set Slot 
                              
                                //Set N, M in VerschiebeSpiel
                               QObject::connect(editN,SIGNAL(textChanged(QString)),spielFenster,SLOT(setN(QString)));
                               QObject::connect(editM,SIGNAL(textChanged(QString)),spielFenster,SLOT(setM(QString)));
                              
                              
                              

                              So how can I open the Konfiguration Window via the Menu bar of Mainwindow but I can still use the Konfiguration to configure the MainWindow ?

                              Muss be simple for you guys, but quite hard for newbie :)

                              thx for your help

                              mrjjM 1 Reply Last reply
                              0
                              • Y Yrandom

                                WOW. All the discussion :)
                                First off all, thx for the answer.
                                I have one more question to fullfill my Project. I dont want to start new Topic.

                                I have a class GameKonfiguration
                                and class MainWindow
                                and the main()

                                #include "Konfiguration.h"
                                #include "MainWindow.h"
                                    
                                int main(int argc, char *argv[]) {
                                    // initialize resources, if needed
                                    // Q_INIT_RESOURCE(resfile);
                                
                                    QApplication app(argc, argv);
                                    
                                    MainWindow *window = new MainWindow(&app);
                                    window->show();
                                
                                    Konfiguration *konfiguration = new Konfiguration(&app,window);
                                    konfiguration->show();
                                
                                    return app.exec();
                                }
                                

                                in main

                                Now I make this Programm so far, that when i start, both Windows open and i can Change configuration and the gamefield show and user can Play and actually i can quit the game via configuration. everything fine

                                Now I want to Combine the menu bar from mainwindow and use the menu bar to open my configuration window.
                                However the Problem i have is now, i cant include Header a in Header b and Header b in Header a.

                                // mainwindow Header file
                                #include "ui_MainWindow.h"
                                #include <QApplication>
                                //some Header here
                                
                                //try
                                #include "Konfiguration.h"
                                //-- not work because in Konfiguration.h i already include mainwindow.h in oder to use for the Slot etc
                                
                                
                                using namespace std;
                                
                                class MainWindow : public QMainWindow {
                                   Q_OBJECT
                                private:
                                    Ui::MainWindow widget;
                                    QApplication *app;
                                    // Try
                                Konfiguration *confi;
                                    
                                public:
                                    MainWindow(QApplication*);
                                  //some function
                                    
                                signals:
                                    public slots:
                                      // function etc ........
                                       void openConfi();
                                };
                                
                                 
                                
                                
                                // in mainwindow.cpp
                                // Open Game Configuration
                                    QObject::connect(widget.SpielKonfiguration,SIGNAL(triggered()),this,SLOT(openConfi()));
                                    
                                    // End Game
                                    QObject::connect(widget.SpielBeenden,SIGNAL(triggered()),app,SLOT(quit()));
                                
                                 // Configuration Window
                                void MainWindow::openConfi(){
                                    // in this Slot , the configuration window should open
                                confi->show();
                                }
                                
                                

                                Konfiguration.h and cpp

                                #ifndef KONFIGURATION_H
                                #define KONFIGURATION_H
                                
                                
                                #include <QApplication>
                                #include "MainWindow.h"
                                // some Header here....
                                
                                class Konfiguration : public QDialog{
                                    Q_OBJECT
                                    
                                private:
                                    QApplication *app;
                                  // here i create mainwindow pointer to Setup the gamefield
                                    MainWindow *spielFenster;    
                                       //some code here
                                public:
                                    Konfiguration(QApplication*, MainWindow*);
                                    virtual ~Konfiguration();     
                                
                                    public slots:
                                        void clearText();
                                //      void updateTextN(QString);
                                //      void updateTextM(QString);
                                };
                                
                                
                                //konfiguration.cpp
                                
                                // use the mainwindow pointer to set Slot 
                                
                                  //Set N, M in VerschiebeSpiel
                                 QObject::connect(editN,SIGNAL(textChanged(QString)),spielFenster,SLOT(setN(QString)));
                                 QObject::connect(editM,SIGNAL(textChanged(QString)),spielFenster,SLOT(setM(QString)));
                                
                                
                                

                                So how can I open the Konfiguration Window via the Menu bar of Mainwindow but I can still use the Konfiguration to configure the MainWindow ?

                                Muss be simple for you guys, but quite hard for newbie :)

                                thx for your help

                                mrjjM Offline
                                mrjjM Offline
                                mrjj
                                Lifetime Qt Champion
                                wrote on last edited by mrjj
                                #22

                                @Yrandom

                                the circular includes problem can often be solved with a forward of the class

                                so instead of ( in the other class header)
                                #include <myclass>

                                you just
                                do

                                class MyClass; // this is a forward

                                and you are allowed to have
                                class Other {
                                MyClass * mc;

                                Since all the use of the Myclass functions, are in the CPP file, it works.

                                In the CPP file you then include the actual header.

                                Not sure i explained it good :(

                                Please see
                                http://stackoverflow.com/questions/625799/resolve-header-include-circular-dependencies

                                Y 1 Reply Last reply
                                2
                                • mrjjM mrjj

                                  @Yrandom

                                  the circular includes problem can often be solved with a forward of the class

                                  so instead of ( in the other class header)
                                  #include <myclass>

                                  you just
                                  do

                                  class MyClass; // this is a forward

                                  and you are allowed to have
                                  class Other {
                                  MyClass * mc;

                                  Since all the use of the Myclass functions, are in the CPP file, it works.

                                  In the CPP file you then include the actual header.

                                  Not sure i explained it good :(

                                  Please see
                                  http://stackoverflow.com/questions/625799/resolve-header-include-circular-dependencies

                                  Y Offline
                                  Y Offline
                                  Yrandom
                                  wrote on last edited by
                                  #23

                                  @mrjj
                                  thx for the quick answer.

                                  Now I got build successfull but when I start the Programm and klick on menubar set configuration
                                  I got Windows disconnection and have to quit

                                  here is what i Changed

                                  ///////////////////////////////
                                  // in mainwindow.h
                                  // mainclass mainwindow
                                  #include <QMenuBar>
                                  #include <QAction>
                                  
                                  class Konfiguration; // this is the other class
                                  
                                  using namespace std;
                                  
                                  class MainWindow : public QMainWindow {
                                     Q_OBJECT
                                  private:
                                  Konfiguration *confi;
                                  //code
                                  }
                                  
                                  //////////////////////////
                                  //mainwindow.cpp
                                  #include "mainwindow.h"
                                  #include "Konfiguration.h"
                                  
                                   // Configuration Window
                                  void MainWindow::openConfi(){
                                  //
                                  // try to add something like confi = new Konfiguration(&app,this) like in the main() is not working either.
                                  //
                                      confi->show();
                                  // Debugger stoppt at show()
                                  }
                                  
                                  // in Konfiguration.h
                                  #include "MainWindow.h"
                                  
                                  class Konfiguration : public QDialog{
                                      Q_OBJECT
                                      
                                  private:
                                  code
                                  }
                                  
                                  
                                  
                                  
                                  mrjjM 1 Reply Last reply
                                  0
                                  • Y Yrandom

                                    @mrjj
                                    thx for the quick answer.

                                    Now I got build successfull but when I start the Programm and klick on menubar set configuration
                                    I got Windows disconnection and have to quit

                                    here is what i Changed

                                    ///////////////////////////////
                                    // in mainwindow.h
                                    // mainclass mainwindow
                                    #include <QMenuBar>
                                    #include <QAction>
                                    
                                    class Konfiguration; // this is the other class
                                    
                                    using namespace std;
                                    
                                    class MainWindow : public QMainWindow {
                                       Q_OBJECT
                                    private:
                                    Konfiguration *confi;
                                    //code
                                    }
                                    
                                    //////////////////////////
                                    //mainwindow.cpp
                                    #include "mainwindow.h"
                                    #include "Konfiguration.h"
                                    
                                     // Configuration Window
                                    void MainWindow::openConfi(){
                                    //
                                    // try to add something like confi = new Konfiguration(&app,this) like in the main() is not working either.
                                    //
                                        confi->show();
                                    // Debugger stoppt at show()
                                    }
                                    
                                    // in Konfiguration.h
                                    #include "MainWindow.h"
                                    
                                    class Konfiguration : public QDialog{
                                        Q_OBJECT
                                        
                                    private:
                                    code
                                    }
                                    
                                    
                                    
                                    
                                    mrjjM Offline
                                    mrjjM Offline
                                    mrjj
                                    Lifetime Qt Champion
                                    wrote on last edited by
                                    #24

                                    @Yrandom said in Set Delay Timer:

                                    Konfiguration *confi;

                                    Did you remeber to new it ?

                                    Konfiguration *confi; is just a pointer :)

                                    you MUST do
                                    confi = new Konfiguration()

                                    before using it for anything

                                    Y 1 Reply Last reply
                                    1
                                    • mrjjM mrjj

                                      @Yrandom said in Set Delay Timer:

                                      Konfiguration *confi;

                                      Did you remeber to new it ?

                                      Konfiguration *confi; is just a pointer :)

                                      you MUST do
                                      confi = new Konfiguration()

                                      before using it for anything

                                      Y Offline
                                      Y Offline
                                      Yrandom
                                      wrote on last edited by
                                      #25

                                      @mrjj

                                      :D my bad
                                      i did that but i pas the function by reference

                                      void MainWindow::openConfi(){
                                      //
                                       //try to add something like confi = new Konfiguration(&app,this) like in the main() is not working either.
                                      // pass by reference mistake :D
                                          confi->show();
                                      // Debugger stoppt at show()
                                      }
                                      
                                      //
                                      // IT work now. :D
                                      //
                                      
                                      
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                                        mchinand
                                        wrote on last edited by
                                        #26

                                        I wonder if this could be achieved using Property Animation instead of using timers and stylesheet manipulation.

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