如何通过键盘为QTableWidget创建信号?

问题描述

我有一张桌子，并用向左，向右，向上，向下按钮在内部移动.现在，当我停留在某个单元格中并按空格键时，需要创建一个信号.该信号还应带来该单元的坐标.我尝试使用QTableWidget的标准信号，但是它不起作用.我该如何解决?

I have a table and move around inside with left, right, up, down buttons. Now I need to create a SIGNAL when I stay in a certain cell and press SPACE button. This SIGNAL should bring also the coordinate of that cell. I tried with standard signals of QTableWidget but it does not work. How can I solve this?

推荐答案

创建一个单独的头文件，即"customtable.h"，然后在设计器中将现有的QTableWidget提升为此类.

Create a separate header file i.e. "customtable.h" and then in the Designer you can Promote the existing QTableWidget to this class.

class customTable:public QTableWidget
{
   Q_OBJECT
   public:
      customTable(QWidget* parent=0):QTableWidget(parent){}
   protected:
      void keyPressEvent(QKeyEvent *e)
      {
         if(e->key()==Qt::Key_Space)
         {
            emit spacePressed(this->currentRow(),this->currentColumn());
         }
         else { QTableWidget::keyPressEvent(e); }
      }
   signals:
      spacePressed(int r, int c);
};

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