CppExerciseQtHideAndShow1Answer.md

 

 

 

 

 

(C++) Answer of exercise: Qt hide and show #1

 

Answer of exercise: Qt hide and show #1 is the answer of the exercise Qt hide and show #1.

 

 

 

 

 

Solution

 

• Download the Qt Creator project 'CppExerciseQtHideAndShow1Answer' (zip)

 

The uninteded behavior is coded in main:

 

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#include <QtGui/QApplication> #include "firstdialog.h" int main(int argc, char *argv[]) {   QApplication a(argc, argv);   FirstDialog w;   w.exec(); }

 

I think that this means, that at the moment when FirstDialog is hidden (for showing the second dialog) and the second dialog closes, FirstDialog::exec finishes with an error code of zero.

 

Instead, I want that that moment is bridged until the first dialog closes. In that case main should be:

 

main.cpp

 

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#include <QtGui/QApplication> #include "firstdialog.h" int main(int argc, char *argv[]) {   QApplication a(argc, argv);   FirstDialog w;   w.show();   a.exec(); }