Starting with your ui file I get a design which seems ok when I click 1. in the QGroupBoxlayout->vertical (then I see the narrow band) 2. again layout->vertical on the empty space on the right of the QGroupBox 3. and change the sizePolicy property of listingTB to expanding
This seems to work and I do not know why. But if I 1. create a new dialog 2. put a push button 3. put a group box 4. put a lineedit in group box 5. select push button and group box 6. layout vertically groupbox is a groupbox of size 0 (?) and lineedit disappears. This bothered me quite a bit and reading designer help did not help. Bo
