Qt Slots Not Work

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1. Qt Slots Not Work Windows 10
2. Qt Signal And Slots
3. Qt Slot Sender
4. Qt Signal Slot Not Working

• Status:Reported
• Resolution: Unresolved
• Fix Version/s: None
• Labels:
• Environment:

Qt Slots Not Work Windows 10

There is a problem with ActiveQt (5.4.2), when trying to call a slot via the COM interface. The problem occurs, if the slot receives a parameter, which is an object pointer (simple datatypes as int work correctly) and if the code is enclosed in a namespace, and also when the name defined in a CoClassAlias definition differs from the class name.

See the attached example for more information. It contains a COM application (modified Qt example) and a VBS script. The application has two flags to enable/disable namespaces and aliases.

When both namespace and aliases are turned off, the VBS script works as expected and pops up a message box, indicating the slot DocumentList::addExistingDocument has been called. When enabling the namespace the following error message occurs, when invoking the script:

Microsoft VBScript runtime error: Object doesn't support this property or method: 'server.documents'

When additionally turning on the aliases, the error message changes to

Microsoft VBScript runtime error: Object doesn't support this property or method: 'docList.addExistingDocument'

Steps to reproduce:

• Do in-source build of test project
• Run wscript test.vbs

1. qtbug47001_comapp_sample_repro.diff

   4 kB

2. qtbug47001.zip

   4 kB

QTBUG-16466idc.exe ignores COM class namespace in methods arguments and return value.

• Closed

Qt Signal And Slots

Qt Slot Sender

Qt Signal Slot Not Working