QT无法使用自动调整大小的QLineEdit和布局

Question

I have created a custom widget extending QLineEdit. I want this is 'autosize'. Ok I get it using

connect(this,SIGNAL(textChanged(QString)), this, SLOT(resizeLineEditToContents()));

I have 2 of this widgets. The idea is that a resize of widget 1 is used by the horizontal layout where I have placed the two widgets to place rightly the widget 2.

But it is impossible, I have played with all the policy possible value, without success.

The layout tries always to adjust the size of my QLineEdit widget .... (It happens also with a standard QLineEdit ). Any help?
Thanks

Answer 1

Actually, it's not necessary to have the signature of signals and slots to be the same, and Qt actually asks in the documentation to not put 'const' and '&' on it because of the 'normalization'. a Signal can have zero to N parameters, a slot can bave zero to Signal-Number-Of-Parameters, so that's why the connect works.

but back to your problem, you need to use setFixedWidth, so it will know to not resize back to the old width just as soon as you stretch it, then set Layout to prefered, so it will respect your widget's hints.