Preventing New Windows from Opening with QTTabBar in Windows Explorer

Qt Tab Bar is a popular custom tab bar widget for Qt applications that provides users with tabbed browsing functionality. However, when using this feature with Windows Explorer, unwanted new windows might open, which can be distracting and disruptive. In this article, we will discuss how to prevent new windows from opening when using the QT Tab Bar in Windows Explorer.

Understanding the Issue

The issue occurs when users try to open a new folder or file in Windows Explorer using the "Open With" context menu while a Qt application with the QT Tab Bar widget is active. This results in a new instance of Windows Explorer being launched instead of opening the folder or file in the existing instance.

Preventing New Windows from Opening

To prevent new windows from opening when using the QT Tab Bar in Windows Explorer, you can register your Qt application as the default handler for the .exe file associated with Windows Explorer. This way, when users try to open a new folder or file using the "Open With" context menu, your Qt application will be launched instead, and the folder or file will open in a new tab within the application.

Registering Your Qt Application as the Default Handler

To register your Qt application as the default handler for the .exe file associated with Windows Explorer, follow these steps:

1. Locate the Windows registry key for the .exe file associated with Windows Explorer. The key is typically located at:
HKEY_CLASSES_ROOT\Applications\explorer.exe
2. Create a new key under the default key named "Shell" if it doesn't already exist. If it does, make sure it has the correct permissions.
3. Create a new key under the "Shell" key named "Open".
4. Create a new key under the "Open" key named "Command".
5. Set the value of the "Command" key to the path of your Qt application executable, followed by the path to the folder or file you want to open when the application is launched:

   "C:\\Path\\To\\Your\\Qt\\Application.exe" "%1"

6. Save the registry changes and restart your computer to apply the new settings.

Testing the Solution

After registering your Qt application as the default handler for the .exe file associated with Windows Explorer, test the solution by trying to open a new folder or file using the "Open With" context menu in Windows Explorer. Your Qt application should launch instead, and the folder or file should open in a new tab within the application.

In this article, we discussed how to prevent new windows from opening when using the QT Tab Bar in Windows Explorer. By registering your Qt application as the default handler for the .exe file associated with Windows Explorer, you can ensure that new folders and files are opened in new tabs within your application instead of launching new instances of Windows Explorer.

References

• Qt Tab Bar Example
• Registering a File Association