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Creating a timer

  • Artigo

Lets move aways from the RSS readers... I hear some guys heaving a sigh of relief... hehe!! So lets start off with a timer which doesnt work as we usually expect it to..it works backwards!! Isnt that what we all wish. Anyway coming to the point, lets have a timer which counts down and on reaching ZERO plays a song. Sounds like a good app to wake you up when you plan to go for a short nap.

The design is simple. We have a grid with the hour/min/secs and buttons for Starting and Reseting. There is a TextBox at the bottom which gives some status messages. :)

The code looks like this in XAML:

Window1.xaml

 <Window x:Class="timer.Window1"    xmlns=https://schemas.microsoft.com/winfx/avalon/2005    xmlns:x=https://schemas.microsoft.com/winfx/xaml/2005    Title="timer" BorderThickness="1" Height="90" Width ="280"    >
      <StackPanel>            <Grid  >                  <Grid.ColumnDefinitions >                        <ColumnDefinition Width="auto"/>                        <ColumnDefinition Width="auto"/>                        <ColumnDefinition Width="auto"/>                        <ColumnDefinition Width="auto"/>                        <ColumnDefinition Width="auto"/>                        <ColumnDefinition Width="auto"/>                        <ColumnDefinition Width="auto"/>                  </Grid.ColumnDefinitions>
                  <Grid.RowDefinitions>                        <RowDefinition/>                        <RowDefinition/>                  </Grid.RowDefinitions>
                  <TextBox Grid.Column="0" Grid.Row="0" Text="0" Name="hr"  
Width="30" BorderThickness="0"/>                  <Label Grid.Column="1" Grid.Row="0" Content=":"/>                  <TextBox Grid.Column="2" Grid.Row="0" Text="0" Name="min"  
Width="30" BorderThickness="0"/>                  <Label Grid.Column="3" Grid.Row="0" Content=":"/>                  <TextBox Grid.Column="4" Grid.Row="0" Text="0" Name="sec"  
Width="30" BorderThickness="0"/>                  <Button Grid.Column="5" Grid.Row="0" Content="Start"  Click="OnClick" />                  <Button Grid.Column="6" Grid.Row="0" Content="Reset"  Click="OnClick1" />                  <TextBox Grid.ColumnSpan="7" Grid.Row="1" Text="Enter Timer Value"  
IsEnabled="False" Name="status"  BorderThickness="1"/>
            </Grid>      </StackPanel></Window>

Window1.xaml.cs

     public partial class Window1 : Window
    {
        private Clock clk;  //This is a class which keeps track of the time being displayed
        private System.Windows.Threading.DispatcherTimer TimerClock; 
        private void OnClick(object sender, RoutedEventArgs e)
        {
            if (ValidateValues(hr.Text, min.Text, sec.Text))
            {
                TimerClock = new System.Windows.Threading.DispatcherTimer(); <br>//Creates a timerClock and enables it                TimerClock.Interval = new TimeSpan(0, 0, 1);<br>                TimerClock.IsEnabled = true; 

                clk = new Clock(hr.Text, min.Text, sec.Text);
                TimerClock.Tick += new EventHandler(TimerClock_Tick); 
            }
        }
        private void OnClick1(object sender, RoutedEventArgs e)
        {
            TimerClock.IsEnabled = false;
            Clock.hr = Clock.min = Clock.sec = 0;
            hr.Text = Clock.hr.ToString();
            min.Text = Clock.min.ToString();
            sec.Text = Clock.sec.ToString();
        }
        void TimerClock_Tick(object sender, EventArgs e)
        {
            clk.Decrement();
            hr.Text = Clock.hr.ToString();
            min.Text = Clock.min.ToString();
            sec.Text = Clock.sec.ToString();
            if (Clock.completed)<br>            {<br>                TimerClock.IsEnabled = false; 
                SoundPlayer player = new SoundPlayer(@"gurgle.wav");  <br>//Plays the spoilsport of your sleep ;)                player.Play(); 

             } 
        }
        private bool ValidateValues(string hr1, string min1, string sec1)
        {
               //Validate values         }
    }
    public partial class Clock
    {
        public static int hr, min, sec;
        public static bool completed;
        public Clock() { }
        public Clock(string hr1, string min1, string sec1)
        {
            completed = false;
            hr = int.Parse(hr1);
            min = int.Parse(min1);
            sec = int.Parse(sec1);
        }
        public void Decrement()
        {
               //Decrement the hours/mins/secs        }
        public string TimeLeft()
        {
            return (hr.ToString() + ":" + min.ToString() + ":" + sec.ToString());
        }
    }
 

The new things in play that we see here are the SoundPlayer and the Timer which fit in seamlessly with the Avalon code.

So cut short your naps with a simple timer!!

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