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Using the capabilities of winExtras when working with QML

winextras, qt, qml, TaskbarButton, ThumbnailToolBar, JumpList

Some time ago I wrote several articles about using the QtWinExtras library, which opens access to special features that are available only for Windows. Now I want to say a few words about how to repeat, too, using QML. For this we need to create a Qt Quick project, connect the winextras module in the project

import QtWinExtras 1.0

And use 3 objects: TaskbarButton to create a progress bar and manage it, ThumbnailToolBar for work with buttons on the pop-up window of the taskbar and JumpList (for working with jumpList). Also add FileDialog for the full work of jumpList.

For TaskbarButton, you need to set the id properties (to access this object from outside), progress.visible: true. Additionally, you can set the overlay.iconSource icon.

In ThumbnailToolBar we create the ThumbnailToolButton (from one to seven) buttons, set the icons and write the click processing.

In JumpList, the recent section is visible to show the last opened files and frequent to display frequently opened files.

    JumpList {
        id: jumpList
        recent.visible: true
        frequent.visible: true

Do not forget that the file extensions that fall into the jumpList must be registered in the registry. Therefore, add the function associateFileTypes () to the main file, as shown in the previous article .

Another curious possibility is the setting of the transparency of the window. To do this, you need the DwmFeatures object. Its blurBehindEnabled property makes the window transparent if its value is true. If you set it to false, the background color becomes black. I also note that the transparency can be set using the opacity property of the Window object. It differs from blurBehindEnabled in that the latter can have only 2 states (transparent and opaque) and makes only the main part of the window transparent (without widgets placed on it), while opacity sets the degree of transparency and makes the whole window transparent with all the widgets And a frame. Another 4 leftGlassMargin, rightGlassMargin, topGlassMargin, and bottomGlassMargin properties are responsible for the size of the extra margin from the left, right, top, and bottom side of the window, respectively. Indentation values ​​are specified in pixels. The default values ​​are 0. I do not see the application application in these properties, but I wrote about them for completeness.


import QtQuick 2.6
import QtQuick.Window 2.2
import QtQuick.Controls 2.0
import QtQuick.Dialogs 1.0
import QtWinExtras 1.0

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello WinExtras")
    DwmFeatures {
        id: dwmFeatures
        blurBehindEnabled: true
        leftGlassMargin : 10
        rightGlassMargin : 10
        topGlassMargin : 10
        bottomGlassMargin : 10
        excludedFromPeek : false
        peekDisallowed : false
        flip3DPolicy: QtWin.FlipExcludeBelow

        height: 100
        text: "button"

    TaskbarButton {
        id: taskbarButton 
       //overlay.iconSource: "loading.png" 
       overlay.accessibleDescription: "Loading"
        progress.visible: true
        progress.value: 50

   ThumbnailToolBar {
        ThumbnailToolButton { iconSource: "r.png"; tooltip: "Next"; onClicked: taskbarButton.progress.value = taskbarButton.progress.value+1 } 
       ThumbnailToolButton { iconSource: "l.png"; tooltip: "Prep"; onClicked: taskbarButton.progress.value = taskbarButton.progress.value-1 }
        ThumbnailToolButton { iconSource: "pause.png"; tooltip: "Pause"; onClicked: taskbarButton.progress.setPaused(!taskbarButton.progress.paused) }
        ThumbnailToolButton { interactive: false; flat: true }
        ThumbnailToolButton { iconSource: "open.png"; tooltip: "OpenFile"; onClicked:}
        ThumbnailToolButton { iconSource: "exit.png"; tooltip: "Open"; onClicked: Qt.quit() }

    JumpList {
        id: jumpList 
       recent.visible: true 
       frequent.visible: true
        //tasks.visible: true 

    FileDialog {
          id: fileDialog
          selectFolder: true
          title: "Please choose a file"
          folder: shortcuts.home
          onAccepted: {
              console.log("You chose: " + fileDialog.fileUrls)


#include <QFileInfo>
#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QDir>
#include <QSettings>

static void associateFileTypes(const QStringList &fileTypes)
    QString displayName = QGuiApplication::applicationDisplayName();
    QString filePath = QCoreApplication::applicationFilePath();
    QString fileName = QFileInfo(filePath).fileName();
    //qDebug() << displayName << filePath << fileName;
    QSettings settings("HKEY_CURRENT_USER\\Software\\Classes\\Applications\\" + fileName, QSettings::NativeFormat);
    settings.setValue("FriendlyAppName", displayName);
    foreach (const QString& fileType, fileTypes)
        settings.setValue(fileType, QString());
    settings.setValue("FriendlyAppName", displayName);
    settings.setValue(".", QChar('"') + QDir::toNativeSeparators(filePath) + QString("\" \"%1\""));
int main(int argc, char *argv[])
    QGuiApplication app(argc, argv);
    app.setApplicationDisplayName("QtWinExtras Test");
    QQmlApplicationEngine engine;
    return app.exec();

Text of the program


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Feb. 18, 2019, 3:39 p.m.

C++ - Test 001. The first program and data types

  • Result:73points,
  • Rating points1
Feb. 15, 2019, 1:03 p.m.
Николай Булахтин

C++ - Test 002. Constants

  • Result:25points,
  • Rating points-10
Last comments
Feb. 14, 2019, 6:41 p.m.

Спасибо огромное! Заработало!
Feb. 12, 2019, 9:26 a.m.

Сам разборался, спасибо.
Feb. 12, 2019, 8:19 a.m.

День добрый! Можешь выложить форму mainwindow.ui от урока? Заранее спасибо
Feb. 11, 2019, 10:51 a.m.
Евгений Легоцкой

Нет, у меня проблема с жёстким диском случилась, занимался восстановлением ПК, ещё пару вечеров придётся этим заниматься, увы.
Now discuss on the forum
Feb. 17, 2019, 5:28 p.m.
Евгений Легоцкой

Добрый день. Очень извиняюсь за долгий ответ Первое, что нашёл, так это необходимость перерисовать чекбокс. void CheckBoxDelegate::paint(QPainter *painter, const QStyleOptionViewItem ...
Feb. 15, 2019, 3:36 p.m.
Евгений Легоцкой

Ну я тут нашёл одно решение, но сам его не проверял. Вам нужно помещать фамилии скорее всего в ячейки заголовка, и потом просто перерисовывать их QHeaderView * header = m_ui->tableWidget...
Feb. 15, 2019, 7:53 a.m.
Евгений Легоцкой

Добрый день! Не работал с remoteobjects, поэтому глянул документацию, чтобы рассмотреть, что это за зверь. После просмотра документации сложилось стойкой впечатление, что это вполне возм...
Feb. 14, 2019, 6:28 p.m.

Нашел решение на Java. Удалось интегрировать в проект сервиса на Qt, теперь из Qt запускаю Java-код акселерометра.
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