利用LabWindows/CVI实现媒体文件的播放(三)_小信

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利用LabWindows/CVI实现媒体文件的播放(三)

(2006-11-26 11:31:13)

分类： LabWindow/CVI技术文章

　　续“利用LabWindows/CVI实现媒体文件的播放(二)”

代码如下：

//关于对话框
void CVICALLBACK about (int menuBar, int menuItem, void *callbackData,
int panel)
{
aboutpanelhandle = LoadPanel (0, "mediaplayer.uir", PANEL_ABOU);
InstallPopup (aboutpanelhandle);
}

//打开媒体文件
int CVICALLBACK openfile (int panel, int control, int event,
  void *callbackData, int eventData1, int eventData2)
{
int len;
char pathname[MAX_PATHNAME_LEN];
switch (event)
{
  case EVENT_COMMIT:
   if (control == PANEL_OPEN_BTN_OPENFILE)
   {
    GetCtrlVal (openURLhandle, PANEL_OPEN_STRING_OPENFILE, pathname);
    WMPLib_IWMPPlayer4SetURL (objecthandle, NULL, pathname);
    DiscardPanel (openURLhandle);
    SetCtrlAttribute (panelHandle, PANEL_TIMER, ATTR_ENABLED, 1);
    addmenu();
   }
   break;
  case EVENT_VAL_CHANGED:
   GetCtrlAttribute (openURLhandle, PANEL_OPEN_STRING_OPENFILE, ATTR_STRING_TEXT_LENGTH, &len);
   if (len>0)
   {
    SetCtrlAttribute (openURLhandle, PANEL_OPEN_BTN_OPENFILE, ATTR_DIMMED, 0);
   }
   else
   {
    SetCtrlAttribute (openURLhandle, PANEL_OPEN_BTN_OPENFILE, ATTR_DIMMED, 1);
   }
     break;
}
return 0;
}

//取消按钮
int CVICALLBACK cancel (int panel, int control, int event,
  void *callbackData, int eventData1, int eventData2)
{
switch (event)
{
  case EVENT_COMMIT:
   DiscardPanel (openURLhandle);
   break;
}
return 0;
}

int CVICALLBACK fileurl (int panel, int control, int event,
  void *callbackData, int eventData1, int eventData2)
{
switch (event)
{
  case EVENT_COMMIT:
   fileopen(MENUBAR, MENUBAR_FILE_FILEOPEN, 0, PANEL);
   DiscardPanel (openURLhandle);
   break;
}
return 0;
}

int CVICALLBACK panelCB (int panel, int event, void *callbackData,
  int eventData1, int eventData2)
{
int zoom;
int titlebar;
int virtualkey;
char *pval;
int panelwidth;
int panelheight;
char **pathname;
int handle;
switch (event)
{
  case EVENT_CLOSE:
   QuitUserInterface (0);
   break;
  case EVENT_PANEL_SIZE:
   GetPanelAttribute (panelHandle, ATTR_HEIGHT, &panelheight);
   GetPanelAttribute (panelHandle, ATTR_WIDTH, &panelwidth);
   SetCtrlAttribute (panelHandle, PANEL_WINDOWSMEDIAPLAYER, ATTR_LEFT, 0);
   SetCtrlAttribute (panelHandle, PANEL_WINDOWSMEDIAPLAYER, ATTR_TOP, 0);
   SetCtrlAttribute (panelHandle, PANEL_WINDOWSMEDIAPLAYER, ATTR_HEIGHT, panelheight);
   SetCtrlAttribute (panelHandle, PANEL_WINDOWSMEDIAPLAYER, ATTR_WIDTH, panelwidth);
   break;
  case EVENT_KEYPRESS:
   virtualkey = GetKeyPressEventVirtualKey (eventData2);
   if (virtualkey == VAL_ESC_VKEY)
   {
    SetPanelAttribute (panelHandle, ATTR_MENU_BAR_VISIBLE, 1);
    SetPanelAttribute (panelHandle, ATTR_TITLEBAR_VISIBLE, 1);
    SetPanelAttribute (panelHandle, ATTR_WINDOW_ZOOM, VAL_NO_ZOOM);
   }
   break;
  case EVENT_FILESDROPPED:
   pathname = (char **)(eventData1);
   WMPLib_IWMPPlayer4SetURL (objecthandle, NULL, pathname[0]);
   SetCtrlAttribute (panelHandle, PANEL_TIMER, ATTR_ENABLED, 1);
   break;
  case EVENT_LEFT_CLICK:
   GetPanelAttribute (panelHandle, ATTR_TITLEBAR_VISIBLE, &titlebar);
   GetPanelAttribute (panelHandle, ATTR_WINDOW_ZOOM, &zoom);
   if (titlebar == 0 && zoom != VAL_MAXIMIZE)
   {
    GetPanelAttribute (panelHandle, ATTR_SYSTEM_WINDOW_HANDLE, &handle);
    ReleaseCapture();
    SendMessage ((HWND)handle, WM_NCLBUTTONDOWN, HTCAPTION, 0);
   }
   break;
}
return 0;
}

int CVICALLBACK timer (int panel, int control, int event,
  void *callbackData, int eventData1, int eventData2)
{
enum WMPLibEnum_WMPPlayState pwmpps;
switch (event)
{
  case EVENT_TIMER_TICK:
   WMPLib_IWMPPlayer4GetplayState (objecthandle, NULL, &pwmpps);
   if (pwmpps == WMPLibConst_wmppsPlaying || pwmpps == WMPLibConst_wmppsStopped || pwmpps == WMPLibConst_wmppsPaused)
   {
    resize();
    SetCtrlAttribute (panelHandle, PANEL_TIMER, ATTR_ENABLED, 0);
   }
   break;
}
return 0;
}

void resize (void)
{
int ctrlheight;
int ctrlwidth;
GetCtrlAttribute (panelHandle, PANEL_WINDOWSMEDIAPLAYER, ATTR_HEIGHT, &ctrlheight);
GetCtrlAttribute (panelHandle, PANEL_WINDOWSMEDIAPLAYER, ATTR_WIDTH, &ctrlwidth);
SetPanelAttribute (panelHandle, ATTR_HEIGHT, ctrlheight);
SetPanelAttribute (panelHandle, ATTR_WIDTH, ctrlwidth);
}

int CVICALLBACK mediaplayer (int panel, int control, int event,
  void *callbackData, int eventData1, int eventData2)
{
int popupmenubarhandle;
switch (event)
{
  case EVENT_RIGHT_CLICK:
   RunPopupMenu (menubarhandle, MENUBAR_VIEW, panelHandle, eventData1, eventData2, 0, 0, 0, 0);
   break;
  case EVENT_LEFT_CLICK:
   Delay(0.1);
   SetCtrlAttribute (panelHandle, PANEL_TIMER, ATTR_ENABLED, 1);
   break;
}
return 0;
}

int CVICALLBACK marquee (int panel, int control, int event,
  void *callbackData, int eventData1, int eventData2)
{
int panelheight;
int ctrlheight;
int ctrltop;
switch (event)
{
  case EVENT_TIMER_TICK:
   GetCtrlAttribute (aboutpanelhandle, PANEL_ABOU_TEXTMSG, ATTR_TOP, &ctrltop);
   GetCtrlAttribute (aboutpanelhandle, PANEL_ABOU_TEXTMSG, ATTR_HEIGHT, &ctrlheight);
   GetPanelAttribute (aboutpanelhandle, ATTR_HEIGHT, &panelheight);
   if (ctrltop>=-ctrlheight)
   {
    SetCtrlAttribute (aboutpanelhandle, PANEL_ABOU_TEXTMSG, ATTR_TOP, ctrltop-=3);
   }
   else
   {
    SetCtrlAttribute (aboutpanelhandle, PANEL_ABOU_TEXTMSG, ATTR_TOP, panelheight);
   }
   break;
}
return 0;
}

int CVICALLBACK shutaboutpanel (int panel, int control, int event,
  void *callbackData, int eventData1, int eventData2)
{
switch (event)
{
  case EVENT_COMMIT:
   DiscardPanel (aboutpanelhandle);
   break;
}
return 0;
}

void addmenu (void)
{
enum WMPLibEnum_WMPPlayState pwmpps;
char filename[256];
char *pbstrURL;
static int i;

WMPLib_IWMPPlayer4GetURL (objecthandle, NULL, &pbstrURL);
SplitPath (pbstrURL, NULL, NULL, filename);

if (i == 10)
{
  i = 0;
}

switch (i)
{
  case 0:
   menuitemid[0] = NewMenuItem (menubarhandle, MENUBAR_FILE, filename, MENUBAR_FILE_SEPARATOR_8, VAL_MENUKEY_MODIFIER | '0', EventFunctionName, pbstrURL);
   break;
  case 1:
   menuitemid[1] = NewMenuItem (menubarhandle, MENUBAR_FILE, filename, MENUBAR_FILE_SEPARATOR_8, VAL_MENUKEY_MODIFIER | '1', EventFunctionName, pbstrURL);
   break;
  case 2:
   menuitemid[2] = NewMenuItem (menubarhandle, MENUBAR_FILE, filename, MENUBAR_FILE_SEPARATOR_8, VAL_MENUKEY_MODIFIER | '2', EventFunctionName, pbstrURL);
   break;
  case 3:
   menuitemid[3] = NewMenuItem (menubarhandle, MENUBAR_FILE, filename, MENUBAR_FILE_SEPARATOR_8, VAL_MENUKEY_MODIFIER | '3', EventFunctionName, pbstrURL);
   break;
  case 4:
   menuitemid[4] = NewMenuItem (menubarhandle, MENUBAR_FILE, filename, MENUBAR_FILE_SEPARATOR_8, VAL_MENUKEY_MODIFIER | '4', EventFunctionName, pbstrURL);
   break;
  case 5:
   menuitemid[5] = NewMenuItem (menubarhandle, MENUBAR_FILE, filename, MENUBAR_FILE_SEPARATOR_8, VAL_MENUKEY_MODIFIER | '5', EventFunctionName, pbstrURL);
   break;
  case 6:
   menuitemid[6] = NewMenuItem (menubarhandle, MENUBAR_FILE, filename, MENUBAR_FILE_SEPARATOR_8, VAL_MENUKEY_MODIFIER | '6', EventFunctionName, pbstrURL);
   break;
  case 7:
   menuitemid[7] = NewMenuItem (menubarhandle, MENUBAR_FILE, filename, MENUBAR_FILE_SEPARATOR_8, VAL_MENUKEY_MODIFIER | '7', EventFunctionName, pbstrURL);
   break;
  case 8:
   menuitemid[8] = NewMenuItem (menubarhandle, MENUBAR_FILE, filename, MENUBAR_FILE_SEPARATOR_8, VAL_MENUKEY_MODIFIER | '8', EventFunctionName, pbstrURL);
   break;
  case 9:
   menuitemid[9] = NewMenuItem (menubarhandle, MENUBAR_FILE, filename, MENUBAR_FILE_SEPARATOR_8, VAL_MENUKEY_MODIFIER | '9', EventFunctionName, pbstrURL);
   break;
}

i++;
max++;

if (max >= 10)
{
  max = 10;
}

}

void CVICALLBACK EventFunctionName (int menuBarHandle, int menuItemID, void *callbackData, int panelHandle)
{
int i;

for (k=0; k<10; k++)
{
  if (menuItemID == menuitemid[k])
  {
   WMPLib_IWMPPlayer4SetURL (objecthandle, NULL, callbackData);
   SetCtrlAttribute (panelHandle, PANEL_TIMER, ATTR_ENABLED, 1);
   break;
  }
}

k++;

if (k >= max)
{
  k = 0;
}
}

int CVICALLBACK looprandom (int panel, int control, int event,
  void *callbackData, int eventData1, int eventData2)
{
enum WMPLibEnum_WMPPlayState pwmpps;
switch (event)
{
  case EVENT_TIMER_TICK:
   WMPLib_IWMPPlayer4GetplayState (objecthandle, NULL, &pwmpps);
   if (pwmpps == WMPLibConst_wmppsMediaEnded || pwmpps == WMPLibConst_wmppsStopped)
   {
    if (looporrandom == 1)   //random
    {
     k = Random (0, k+1);
    }
    switch ((int)k)
    {
     case 1:
      FakeKeystroke (VAL_MENUKEY_MODIFIER | '1');
      break;
     case 2:
      FakeKeystroke (VAL_MENUKEY_MODIFIER | '2');
      break;
     case 3:
      FakeKeystroke (VAL_MENUKEY_MODIFIER | '3');
      break;
     case 4:
      FakeKeystroke (VAL_MENUKEY_MODIFIER | '4');
      break;
     case 5:
      FakeKeystroke (VAL_MENUKEY_MODIFIER | '5');
      break;
     case 6:
      FakeKeystroke (VAL_MENUKEY_MODIFIER | '6');
      break;
     case 7:
      FakeKeystroke (VAL_MENUKEY_MODIFIER | '7');
      break;
     case 8:
      FakeKeystroke (VAL_MENUKEY_MODIFIER | '8');
      break;
     case 9:
      FakeKeystroke (VAL_MENUKEY_MODIFIER | '9');
      break;
     case 0:
      FakeKeystroke (VAL_MENUKEY_MODIFIER | '0');
      break;
      }
   }
   break;
}
return 0;
}

int CVICALLBACK detect (int panel, int control, int event,
  void *callbackData, int eventData1, int eventData2)
{
int panelwidth;
int panelheight;
int ctrlwidth;
int ctrlheight;
switch (event)
{
  case EVENT_TIMER_TICK:
   GetCtrlAttribute (panelHandle, PANEL_WINDOWSMEDIAPLAYER, ATTR_HEIGHT, &ctrlheight);
   GetCtrlAttribute (panelHandle, PANEL_WINDOWSMEDIAPLAYER, ATTR_WIDTH, &ctrlwidth);

   GetPanelAttribute (panelHandle, ATTR_HEIGHT, &panelheight);
   GetPanelAttribute (panelHandle, ATTR_WIDTH, &panelwidth);

   if (ctrlheight != panelheight || ctrlwidth != panelwidth)
   {
    SetCtrlAttribute (panelHandle, PANEL_TIMER, ATTR_ENABLED, 1);
   }

break;
}
return 0;
}

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