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highgui: fix trackbar value pointer handling

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This commit is contained in:
Alexander Alekhin
2021-05-28 01:58:58 +00:00
parent 3e25f32c9b
commit 3d2f4fa164
2 changed files with 5 additions and 6 deletions
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modules/highgui/src/window_QT.cpp
+4 -5
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@@ -1219,9 +1219,6 @@ void GuiReceiver::addSlider2(QString bar_name, QString window_name, void* value,
if (t) //trackbar exists
return;
if (!value)
CV_Error(CV_StsNullPtr, "NULL value pointer" );
if (count <= 0) //count is the max value of the slider, so must be bigger than 0
CV_Error(CV_StsNullPtr, "Max value of the slider must be bigger than 0" );
@@ -1342,7 +1339,8 @@ void CvTrackbar::create(CvWindow* arg, QString name, int* value, int _count)
slider->setMinimum(0);
slider->setMaximum(_count);
slider->setPageStep(5);
slider->setValue(*value);
if (dataSlider)
slider->setValue(*dataSlider);
slider->setTickPosition(QSlider::TicksBelow);
@@ -1409,7 +1407,8 @@ void CvTrackbar::update(int myvalue)
{
setLabel(myvalue);
*dataSlider = myvalue;
if (dataSlider)
*dataSlider = myvalue;
if (callback)
{
callback(myvalue);