wm_setcapture.c

来自「uCGUI」· C语言 代码 · 共 50 行

/*************************************************************************************************************
                                                   uC/GUI
                                               嵌入式通用图形软件
File        : WM_SetCapture.c
Purpose     : Implementation of WM_SetCapture
************************************************************************************************************/


#include "WM_Intern.H"

#if GUI_WINSUPPORT



void WM__ReleaseCapture(void) {
  if (WM__hCapture) {
    WM_MESSAGE Msg;
    Msg.MsgId  = WM_CAPTURE_RELEASED;
    WM_SendMessage(WM__hCapture, &Msg);
    WM__hCapture = 0;
  }
}


/*************************************************************************************************************
*        Public code
************************************************************************************************************/
void WM_SetCapture(WM_HWIN hObj, int AutoRelease) {
  WM_LOCK();
  if (WM__hCapture != hObj) {
    WM__ReleaseCapture();
  }
  WM__hCapture = hObj;
  WM__CaptureReleaseAuto = AutoRelease;
  WM_UNLOCK();
}

void WM_ReleaseCapture(void) {
  WM_LOCK();
  WM__ReleaseCapture();
  WM_UNLOCK();
}


#else

void WM_SetCapture_c(void) {} /* avoid empty object files */

#endif /* GUI_WINSUPPORT */