Moving more trackbars on single mouse down

[freetomik]

I have more trackbars below each other. When I am moving first one, and go with mouse cursor over next ones, they are being moved instead of first one. It is quite annoying. Could this be fixed to moving only firstly selected trackbar, please?

[Dovyski]

Thanks for your report! Could you please provide a snippet of your code so I can better understand the problem? Are you using a single window for your application or multiple windows, for instance?

[freetomik]

I am using a single window. I just have several trackbars below each other:

cvui::trackbar(...);
cvui::trackbar(...);
cvui::trackbar(...);
cvui::trackbar(...);

When I hold most top trackbar and move mouse into trails of trackbars below, they are moved instead of the top one, which I am holding. [EDIT] Note: Putting trackbars into rows does not help.

[Dovyski]

Could you provide a bit more code regarding the cvui::trackbar(...); call, please? What is in the (...) and what variables are you using?

[freetomik]

Sure, here is complete minimal working example:

#include <opencv2/opencv.hpp>

#define CVUI_IMPLEMENTATION
#include "cvui.h"

int main(int argc, char** argv)
{
    double a = 50.0;
    double b = 25.0;

    const double min = 0.0;
    const double max = 100.0;

    cv::namedWindow("Window", cv::WINDOW_AUTOSIZE);
    cvui::init("Window");

    cv::Mat frame = cv::Mat::zeros(120, 500, CV_8U);

    while (true)
    {
        cvui::window(frame, 0, 0, frame.cols, frame.rows, "Settings");

        cvui::trackbar(frame, 20, 20, frame.cols - 50, &a, min, max);
        cvui::trackbar(frame, 20, 60, frame.cols - 50, &b, min, max);

        cvui::imshow("Window", frame);

        if (cv::waitKey(30) == 27) break;
    }

    return 0;
}

[freetomik]

Behaviour looks like this: This is on single mouse down. When user wants to change only one parameter at time, back and forth, it is annoying, when other parameters are also changed, if he/she misses the exact horizontal trail of the trackbar. [EDIT]: CVUI is otherwise great idea and very useful - thanks for making it! But this one thing I found uncomfortable.

[Dovyski]

Thank you for your information. I'll work on this bug as soon as I have some free time.