在Qt中显示另一个表单时禁用表单

Question

我希望在我显示辅助表单时，主窗体会禁用itselft。 我知道我可以使用this->setEnabled = false;，但我怎么知道二级表格什么时候关闭？ （重新启用主表单）。

提前致谢。

Answer 1

主要小部件

QChildWidget *child = new QChildWidget();
connect(child,SIGNAL(closed()),this,SLOT(childClosed())); //connect child signal to childClosed slot
child->show(); // show child
this->setEnabled(false); // disable main widget

.
.
.
public QMainWidget::childClosed() // implementation of childClosed slot
{
    this->setEnabled(true);
}

child widget

#include <QCloseEvent>
public QChildWidget: public QWidget
{
.
.
.
protected:
      void closeEvent() // it is called when widget is closed
      {
          emit closed();
      }
signals:
        void closed(); // closed signal
};