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QWindowKit

Cross-platform window customization framework for Qt Widgets and Qt Quick. Support Windows, macOS, Linux.

This project inherited most of wangwenx190 FramelessHelper
implementation, with a complete refactoring and upgrading of the architecture.

Gallery

Basic

Windows 10 MacOS Linux
image image image

Windows 11 Snap Layout

image

TODO

  • Fix 5.15 window abnormal behavior
  • Fix window 10 top border color in dark background
  • Fix isFixedSize code
  • Support customized system button area on Mac
  • Implement Mac window context hook
  • Support window attribute switching on Windows

Supported Platforms

  • Microsoft Windows
  • Apple macOS (11+)
  • GNU/Linux

Requirements

Component Requirement Details
Qt >=5.15 Core, Gui, Widgets, Quick
Compiler >=C++17 MSVC 2019, GCC, Clang
CMake >=3.17 >=3.20 is recommended

Tested Compilers

  • Windows
    • MSVC: 2019, 2022
    • MinGW (GCC): 13.2.0
  • macOS
    • Clang 14.0.3
  • Ubuntu
    • GCC: 9.4.0

Dependencies

Integrate

Build & Install

cmake -B build \
  -Dqmsetup_DIR=<dir> \ # Optional
  -DCMAKE_INSTALL_PREFIX=/path/install \
  -G "Ninja Multi-Config"

cmake --build build --target install --config Debug
cmake --build build --target install --config Release

You can also include this directory as a subproject if you choose CMake as your build system.

For other build systems, you need to install with CMake first and include the corresponding configuration files in your
project.

Import

CMake Project

cmake -B build -DQWindowKit_DIR=/path/install/cmake/QWindowKit
find_package(QWindowKit REQUIRED)
target_link_libraries(widgets_app PUBLIC QWindowKit::Widgets)
target_link_libraries(quick_app PUBLIC QWindowKit::Quick)

QMake Project

# WidgetsApp.pro
include("/path/install/share/QWindowKit/qmake/QWKWidgets.pri")

# QuickApp.pro
include("/path/install/share/QWindowKit/qmake/QWKQuick.pri")

Visual Studio Project

TODO

Quick Start

Qt Widgets Application

First, setup WidgetWindowAgent for your top QWidget instance. (Each window needs its own agent.)

#include <QWKWidgets/widgetwindowagent.h>

MyWidget::MyWidget(QWidget *parent) {
    // ...
    auto agent = new QWK::WidgetWindowAgent(w);
    agent->setup(w);
    // ...
}

You can also initialize the agent after the window constructs.

auto w = new MyWidget();
auto agent = new QWK::WidgetWindowAgent(w);
agent->setup(w);

Then, construct your title bar widget, without which the window lacks the basic interaction feature, and it's better to
put it into the window's layout.

You can use the WindowBar provided by WidgetFrame in the examples as the
container of your title bar components.

Let WidgetWindowAgent know which widget the title bar is.

agent->setTitleBarWidget(myTitleBar);

Set system button hints to let WidgetWindowAgent know the role of the child widgets, which is important for the Snap
Layout to work.

agent->setSystemButton(QWK::WindowAgentBase::WindowIcon, myTitleBar->iconButton());
agent->setSystemButton(QWK::WindowAgentBase::Minimize, myTitleBar->minButton());
agent->setSystemButton(QWK::WindowAgentBase::Maximize, myTitleBar->maxButton());
agent->setSystemButton(QWK::WindowAgentBase::Close, myTitleBar->closeButton());

Set hit-test visible hint to let WidgetWindowAgent know the widgets that desire to receive mouse events.

agent->setHitTestVisible(myTitleBar->menuBar(), true);

The rest region within the title bar will be regarded as the draggable area for the user to move the window.

Check MainWindow example to get detailed information.

Qt Quick Application

Make sure you have registered QWK into QtQuick:

#include <QWKQuick/qwkquickglobal.h>

int main(int argc, char *argv[])
{
    // ...
    QQmlApplicationEngine engine;
    // ...
    QWK::registerTypes(&engine);
    // ...
}

Then you can use QWindowKit data types and classes by importing it's URI:

import QtQuick 2.15
import QtQuick.Window 2.15
import QWindowKit 1.0

Window {
    id: window
    visible: false // We hide it first, so we can move the window to our desired position silently.
    Component.onCompleted: {
        windowAgent.setup(window)
        window.visible = true
    }
    WindowAgent {
      // ...
    }
}

You can omit the version number or use "auto" instead of "1.0" for the module URI if you are using Qt6.

Learn More

See examples for more demo use cases. The examples have no High DPI support.

Documentations

License

QWindowKit is licensed under the Apache 2.0 License.