How to call a function using condition?

[mrinmoysarkar-dev]

I want to add a callback or create a slint function inside the AdritaWindow.slint based on the boolean property received from CloseButton.slint that will terminate the Program.
Inside // Adding TitleBar Functionality, I want do something similar as the following,

if (Close.clickedCloseButton) {
    closeWindow;
}

where closeWindow is a callback or a pure function in slint.
The concerned code of the files are given below.

AdritaWindow.slint

import { VerticalBox } from "std-widgets.slint";
import { CustomTitleBar } from "TitleBar/CustomTitleBar.slint";
import { Maximize } from "TitleBar/TitleBarComponents/MaximizeButton.slint";
import { Minimize } from "TitleBar/TitleBarComponents/MinimizeButton.slint";
import { Close } from "TitleBar/TitleBarComponents/CloseButton.slint";

export component AdritaWindow inherits Window {
    // Adding TitleBar Functionality
    minimized: Minimize.clickedMinimizeButton; 
    maximized: Maximize.clickedMaximizeButton;

    // Deleting the Native Window
    no-frame: true;
    background: transparent;

    // Setting the Initial and Minimum Window Size 
    min-width: 900px;
    min-height: 650px;

    // Creating Our Custom Window
    Rectangle {

        // Defining Window Border Properties
        border-color: black;
        border-width: Maximize.clickedMaximizeButton ? 0px : 0.25px;
        border-radius: Maximize.clickedMaximizeButton ? 0px : 15px;

        // Defigning Window Background Properties 
        background: white;

        // Adding TitleBar
        VerticalBox {
            CustomTitleBar {}
        }
    }
}

CloseButton.slint

import { IconButton } from "../../../Material/material.slint";

// Tracks whether the close button has been pressed.
export global Close {
    in-out property <bool> clickedCloseButton: false;
}

// Title-bar button for requesting a close action.
export component CloseButton inherits IconButton {

    // Icon shown for the close action.
    icon: @image-url("../../../../../assets/icons/close.svg");

    // Future hook: connect this to the real window close behavior.
    clicked => {
        Close.clickedCloseButton = true;
    }
}

Just trying to create the functionality of the buttons it the titlebar.