qt-everywhere-src-5.15.1/qtwebengine/examples/webengine/customdialogs/forms/ColorPicker.qml

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import QtQuick 2.4

ColorPickerForm {
    property QtObject request
    signal closeForm()

    okButton.onClicked: {
        request.dialogAccept(colorPicker.color);
        closeForm();
    }

    cancelButton.onClicked: {
        request.dialogReject();
        closeForm();
    }

    function createCallback(color) {
        return function() { colorPicker.color = color };
    }

    Component.onCompleted:{
        for (var i = 0; i < grid.children.length; i++) {
            var cell = grid.children[i];
            cell.clicked.connect(createCallback(cell.color));
        }
        colorPicker.color = request.color;
    }
}