Knowledge Base Nr: 00265 eieruhr.cpp - http://www.swe-kaiser.de

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.NET: c#: soundausgabe auf pocket-pc; power save mode unterdrücken (eieruhr)

  
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using System.Runtime.InteropServices;

namespace Eieruhr
{
  public class Form1 : System.Windows.Forms.Form
  {
...
    protected long m_nTimerOut = 0;
    protected bool m_bTimerRunning = false;
...
    private void DisplayTimer()
    {
      TimeSpan ts = new TimeSpan(m_nTimerOut*1000*TimeSpan.TicksPerMillisecond);

      string strTimeOut = ts.Hours + ":"
                        + ts.Minutes/10 + ts.Minutes%10 + ":"
                        + ts.Seconds/10 + ts.Seconds%10;

      label1.Text = strTimeOut;
    }

    private void buttonStartStop_Click(object sender, System.EventArgs e)
    {
      this.BackColor = System.Drawing.Color.Lavender;
      m_bTimerRunning = !m_bTimerRunning;
      m_bTimerAlarm = false;
      if (m_bTimerRunning)
      {
        buttonStartStop.Text = "Stop";

				//timer synchronisieren
				timer1.Enabled = false;
				timer1.Enabled = true;
      }
      else
      {
        buttonStartStop.Text = "Start";

        TimeSpan ts = new TimeSpan(m_nTimerOut*1000*TimeSpan.TicksPerMillisecond);

        m_nH1 = ts.Hours;
        m_nM1 = ts.Minutes/10;
        m_nM2 = ts.Minutes%10;
        m_nS1 = ts.Seconds/10;
        m_nS2 = ts.Seconds%10;

        UpdateTimer();
      }
    }

    private void buttonH1P_Click(object sender, System.EventArgs e)
    {
      m_nTimerOut++;
      DisplayTimer();
    }

    private void buttonM1P_Click(object sender, System.EventArgs e)
    {
      m_nTimerOut--;
      if (m_nTimerOut < 0)
        m_nTimerOut = 0;
      DisplayTimer();
    }

    private void buttonReset_Click(object sender, System.EventArgs e)
    {
      m_nTimerOut = 0;
      m_bTimerRunning = false;
      DisplayTimer();
    }

    const string FILE_NAME = "\\Windows\\Alarm1.wav";

    private void timer1_Tick(object sender, System.EventArgs e)
    {
      if (m_bTimerRunning)
      {
        m_nTimerOut--;

        Externals.SetVolume(1.0); //100%
        Externals.SystemIdleTimerReset();

        if (m_nTimerOut < 0)
        {
          this.BringToFront();
          this.Show();
          this.Focus();
          BackColor = m_bBlink ? System.Drawing.Color.Red
                     : System.Drawing.Color.Lavender;
          m_bBlink = !m_bBlink;

          Externals.Play(FILE_NAME);
          m_nTimerOut = 0;
          m_bTimerAlarm = true;
        }

        DisplayTimer();
      }
    }

  }

  internal class Helpers
  {
    [Flags]
      public enum PlaySoundFlags : int
    {
      SND_SYNC = 0x0000,  /* play synchronously (default) */
      SND_ASYNC = 0x0001,  /* play asynchronously */
      SND_NODEFAULT = 0x0002,  /* silence (!default) if sound not found */
      SND_MEMORY = 0x0004,  /* pszSound points to a memory file */
      SND_LOOP = 0x0008,  /* loop the sound until next sndPlaySound */
      SND_NOSTOP = 0x0010,  /* don't stop any currently playing sound */
      SND_NOWAIT = 0x00002000, /* don't wait if the driver is busy */
      SND_ALIAS = 0x00010000, /* name is a registry alias */
      SND_ALIAS_ID = 0x00110000, /* alias is a predefined ID */
      SND_FILENAME = 0x00020000, /* name is file name */
      SND_RESOURCE = 0x00040004  /* name is resource name or atom */
    }

    [DllImport("coredll")]
    public static extern bool PlaySound( string szSound, IntPtr hMod, PlaySoundFlags flags );
    [DllImport("coredll")]
    public static extern void SystemIdleTimerReset();
    [DllImport("coredll")]
    public static extern int GetTickCount();
    [DllImport("coredll")]
    public static extern int waveOutSetVolume(IntPtr hwo, int nVol);
  }

  public class Externals
  {
    public static void Play( string strFileName )
    {
      Helpers.PlaySound( strFileName, IntPtr.Zero, Helpers.PlaySoundFlags.SND_FILENAME | Helpers.PlaySoundFlags.SND_ASYNC );
    }
    public static void SystemIdleTimerReset()
    {
      Helpers.SystemIdleTimerReset();
    }
    public static int GetTickCount()
    {
      return Helpers.GetTickCount();
    }
    public static void SetVolume(double fPercent)
    {
      int dwNewVolume = (int)((float)0xffff * fPercent) & 0xffff;
      int dwVolume = (int)((dwNewVolume<<16)&0xffff0000) | dwNewVolume;
      Helpers.waveOutSetVolume(IntPtr.Zero, dwVolume);
    }
}