Widget proportions in QSplitter

[godi]

Hello,

I am having some problems with the widgets proportions in different QSplitter.

I have 3 Qsplitter and four widgets of different classes (QTreeWidget, QFrame, QTableWidget and QWidget). I create the whole structure in QtDesigner having the design and hierarchy shown in pictures 1 & 2.

The problems arrive when I want to set the widgets size before the window is shown. I have the following lines in order to try and have the figure shown in picture 3, 1/3 of the space for the first widget and 2/3 for the second one in each splitter.

ui->treeSplitter->setStretchFactor(0, 1);
ui->treeSplitter->setStretchFactor(1, 2);
 
ui->logSplitter->setStretchFactor(0, 1);
ui->logSplitter->setStretchFactor(1, 2);
 
ui->tableSplitter->setStretchFactor(0, 1);
ui->tableSplitter->setStretchFactor(1, 2);

ui->treeSplitter->setStretchFactor(0, 1);
ui->treeSplitter->setStretchFactor(1, 2);

ui->logSplitter->setStretchFactor(0, 1);
ui->logSplitter->setStretchFactor(1, 2);

ui->tableSplitter->setStretchFactor(0, 1);
ui->tableSplitter->setStretchFactor(1, 2);

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Is there something I am missing? Could you point me out where the problem could be?

Thanks in advance.

1.png2.png3.jpg