如何在 QT 中从主窗口显示另一个窗口 [英] How to show another window from mainwindow in QT

问题描述

平台:QT、Windows XP

Platform: QT, Windows XP

我是 Qt 的新手.我想从 mainwindow 显示另一个窗口(如何将其打开为对话框).我做了add New Item ->Qt Designer Form Class"，命名为 MyWindow.但是如何从 mainwindow 显示这个 MyWindow ?

I am new to Qt. I want to show another window(what to do to open it as dialog) from mainwindow. I did "add New Item ->Qt Designer Form Class", named it say MyWindow. But how to show this MyWindow from mainwindow ?

推荐答案

1. 在 QMainWindow 中实现一个插槽，您将在其中打开新窗口，
2. 在 QMainWindow 上放置一个小部件，
3. 将此小部件的信号连接到 QMainWindow 的插槽(例如:如果小部件是 QPushButton，则将信号 click() 连接到您创建的 QMainWindow 自定义插槽).

1. Implement a slot in your QMainWindow where you will open your new Window,
2. Place a widget on your QMainWindow,
3. Connect a signal from this widget to a slot from the QMainWindow (for example: if the widget is a QPushButton connect the signal click() to the QMainWindow custom slot you have created).

代码示例:

MainWindow.h

// ...
include "newwindow.h"
// ...
public slots:
   void openNewWindow();
// ...
private:
   NewWindow *mMyNewWindow;
// ...
}

MainWindow.cpp

// ...
   MainWindow::MainWindow()
   {
      // ...
      connect(mMyButton, SIGNAL(click()), this, SLOT(openNewWindow()));
      // ...
   }
// ...
void MainWindow::openNewWindow()
{
   mMyNewWindow = new NewWindow(); // Be sure to destroy your window somewhere
   mMyNewWindow->show();
   // ...
}

这是一个关于如何显示自定义新窗口的示例.有很多方法可以做到这一点.

This is an example on how display a custom new window. There are a lot of ways to do this.

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