“Cannot anchor to a null item” waring in QML

The following QML code

    id: call

    //margins should bound but not assigned
    anchors.topMargin: root.above ? undefined : yMargin
    anchors.bottomMargin: root.above ? yMargin : undefined


produced “Cannot anchor to a null item” warning and worked incorrectly.

I tried to replace it with AnchorChanges and PropertyChanges:


Sharing Android phone over TCP with ADB

I was able to share my Android phone over TCP with the following commands:

adb kill-server
start cmd /k adb -a -P 5037 nodaemon server start

Building RenderDoc for Android on WSL

I cloned the repository, created build directory, set environment variables and run CMake:

git clone https://github.com/baldurk/renderdoc.git
cd renderdoc/
mkdir build-android
cd build-android
export JAVA_HOME=~/dev/repos/graphicsprofiler/tools/buildtools/jdk
export ANDROID_SDK=~/dev/repos/graphicsprofiler/tools/buildtools/android
export ANDROID_NDK=~/dev/repos/graphicsprofiler/tools/buildtools/android/ndk-bundle/android-ndk-r20b
export PATH=$PATH:$JAVA_HOME/bin
cmake -DBUILD_ANDROID=On -DANDROID_ABI=armeabi-v7a ..

Generating a certificate for Huawei App Gallery

List existing certificates:

set PATH=%PATH%;C:\Program Files\Android\Android Studio\jbr\bin
keytool.exe -list -v -keystore linesgame.keystore

Generate the new one:

keytool.exe -genkey -v -keystore linesgame.keystore -alias linesgame-huawei -keyalg RSA -keysize 2048 -validity 100000

Running GUI apps on WSL

Updating existing WSL installation

I updated WSL according to this MS guide:

wsl --update
wsl --shutdown
wsl --version
WSL version:
Kernel version:
WSLg version: 1.0.51
MSRDC version: 1.2.3770
Direct3D version: 1.608.2-61064218
DXCore version: 10.0.25131.1002-220531-1700.rs-onecore-base2-hyp
Windows version: 10.0.19045.2604

Building PowerVR Vulkan Samples

I did

git clone https://github.com/powervr-graphics/Native_SDK.git
cd Native_SDK
git submodule update --init --recursive

opened build-android folder in Android Studio and started the build.

How I installed VNC on Ubuntu 22.04

I followed this guide, opened UDP port on my Windows machine:


Connecting to Ubuntu 22.04 with Remote Desktop

I simply installed:

sudo apt install ubuntu-desktop-minimal -y
sudo apt install xrdp -y
systemctl status xrdp

and was able to connect with Remote Desktop from Windows as root user:


A right way to query password from a console in JavaScript

import * as readline from 'node:readline/promises';
import { stdin as input, stdout as output } from 'node:process';
import { Writable } from 'node:stream';

var mutableStdout = new Writable({
  write: function(chunk, encoding, callback) {
    if (!this.muted)
      output.write(chunk, encoding);

mutableStdout.muted = false;

var rl = readline.createInterface({
  input: input,
  output: mutableStdout,
  terminal: true

Building QT6.4 for Windows with Vulkan support

Installed Vulkan SDK and built QT6.4.2 for windows with the following script:


"C:\Program Files\Microsoft Visual Studio\2022\Professional\VC\Auxiliary\Build\vcvarsall.bat" amd64


mkdir \dev\build\qt
cd \dev\build\qt
set "CMAKE_ROOT=%MY_DRIVE%\dev\tools\cmake-3.24.2-windows-x86_64\bin"
set "NINJA_ROOT=%MY_DRIVE%\dev\tools\ninja-win"
set "PERL_ROOT=%MY_DRIVE%\dev\tools\Strawberry\perl\bin"
set "PYTHON_ROOT=%MY_DRIVE%\dev\tools\Python35"
set VULKAN_SDK=%MY_DRIVE%/dev/tools/VulkanSDK/