[Qt-creator] Generation of UI file problem

[Greg Santucci]

When making a new widget with File->New->"Qt Designer Form Class", specifying a name, and adding some controls to it, I get compile errors saying "invalid use of undefined type 'struct Ui::TestWidgetOfDoom'"

I tracked it down to the name of the widget being "Form" instead of "TestWidgetOfDoom" when I open testwidgetofdoom.ui in the editor. Initially I was suspicious when I saw "Form" instead of "TestWidgetOfDoom" in the ui_testwidgetofdoom.h file.

The workaround is to manually correct the name in the Qt Designer. This bug won't appear if no controls are added, so maybe the ui file is generated correctly initially, but when opened in the designer, is reverted to the name "Form".