Method GetMouseWheelDelta

Namespace

OpenCvSharp

Assembly

OpenCvSharp.dll

GetMouseWheelDelta(MouseEventFlags)

Gets the mouse-wheel motion delta, when handling mouse-wheel events cv::EVENT_MOUSEWHEEL and cv::EVENT_MOUSEHWHEEL.

For regular mice with a scroll-wheel, delta will be a multiple of 120. The value 120 corresponds to a one notch rotation of the wheel or the threshold for action to be taken and one such action should occur for each delta.Some high-precision mice with higher-resolution freely-rotating wheels may generate smaller values.

For cv::EVENT_MOUSEWHEEL positive and negative values mean forward and backward scrolling, respectively.For cv::EVENT_MOUSEHWHEEL, where available, positive and negative values mean right and left scrolling, respectively.

public static int GetMouseWheelDelta(MouseEventFlags flags)

Parameters

flags MouseEventFlags

The mouse callback flags parameter.

Returns

int