WinRT support

Overview

This figure explains new functionality implemented with WinRT GUI. More…

// global functions

void
cv::winrt_initContainer(::Windows::UI::Xaml::Controls::Panel^ container);

Detailed Documentation

This figure explains new functionality implemented with WinRT GUI. The new GUI provides an Image control, and a slider panel. Slider panel holds trackbars attached to it.

Sliders are attached below the image control. Every new slider is added below the previous one.

See below the example used to generate the figure:

void sample_app::MainPage::ShowWindow()
{
    static cv::String windowName("sample");
    cv::winrt_initContainer(this->cvContainer);
    cv::namedWindow(windowName); // not required

    cv::Mat image = cv::imread("Assets/sample.jpg");
    cv::Mat converted = cv::Mat(image.rows, image.cols, CV_8UC4);
    cv::cvtColor(image, converted, COLOR_BGR2BGRA);
    cv::imshow(windowName, converted); // this will create window if it hasn't been created before

    int state = 42;
    cv::TrackbarCallback callback = [](int pos, void* userdata)
    {
        if (pos == 0) {
            cv::destroyWindow(windowName);
        }
    };
    cv::TrackbarCallback callbackTwin = [](int pos, void* userdata)
    {
        if (pos >= 70) {
            cv::destroyAllWindows();
        }
    };
    cv::createTrackbar("Sample trackbar", windowName, &state, 100, callback);
    cv::createTrackbar("Twin brother", windowName, &state, 100, callbackTwin);
}

Global Functions

void
cv::winrt_initContainer(::Windows::UI::Xaml::Controls::Panel^ container)

Initializes container component that will be used to hold generated window content.

Must be called to assign WinRT container that will hold created windows content.

Parameters:

container

Container (Panel^) reference that will be used to hold generated window content: controls and image.