Revision history [back]

Hi

i am using the setMouseCallback, same usage as https://answers.opencv.org/question/32888/passing-multiple-parameters-with-the-setmousecallback-function/.it My structure is as follows:

struct cbParams_t { Point pSingle; vector<point> pUpAndpDown; Mat cropped; int count; cbParams_t() : pSingle(), pUpAndpDown(), croppedCloth(), count() {} } ;

But for some reason count seems to not be updated, the code:

cbParams_t cbParams; setMouseCallback( "Img2", onMouseImg2, &cbParams ); //1

Inside the callback: static void onMouseImg2(int event, int i, int j, int flags, void* param) ... cbParams_t * pCbParams = (cbParams_t ) param; int * pCount = &(pCbParams->count); ... ( pCount ) ++;

And painfully, count is still set to 0

Best regards.

Hi

i am using the setMouseCallback, same usage as https://answers.opencv.org/question/32888/passing-multiple-parameters-with-the-setmousecallback-function/.it My structure is as follows:

struct cbParams_t { Point pSingle; vector<point> pUpAndpDown; Mat cropped; int count; cbParams_t() : pSingle(), pUpAndpDown(), croppedCloth(), cropped(), count() {} } ;

But for some reason count seems to not be updated, the code:

cbParams_t cbParams; setMouseCallback( "Img2", onMouseImg2, &cbParams ); //1

Inside the callback: static void onMouseImg2(int event, int i, int j, int flags, void* param) ... cbParams_t * pCbParams = (cbParams_t ) param; int * pCount = &(pCbParams->count); ... ( pCount ) ++;

And painfully, count is still set to 0

Best regards.

Hi

i am using the setMouseCallback, same usage as https://answers.opencv.org/question/32888/passing-multiple-parameters-with-the-setmousecallback-function/.it My structure But for some reason one of the fields is as follows:not updated inside the callback The code:

 struct cbParams_t
 {
  Point pSingle;
vector<point>  vector<Point> pUpAndpDown;
 Mat cropped;
croppedCloth;
 int count;
  cbParams_t() : pSingle(), pUpAndpDown(), cropped(), croppedCloth(), count() {}
 } ;
 
But for some reason count seems to not be updated, the code:
 
;
// registering the callback:
cbParams_t cbParams;
 setMouseCallback( "Img2", onMouseImg2, &cbParams ); //1
 
Inside )
// inside the callback:
 static void onMouseImg2(int event, int i, int j, int flags, void* param)
...
 {
cbParams_t * pCbParams = (cbParams_t ) param;
*) param ;
int * pCount = &(pCbParams->count);
...
(  (* pCount ) ++;
 
And painfully, ++;
...
}
// but when i come back inside the callback count is still set to 0not incremented