How can I make the child window button respond to the slot function on the parent window? Very anxio

You mean that a button in the child window is clicked, and a slot function on the parent window responds to the click, right?

It's very simple: 1) Add a signal to the child window, and add a response slot to the parent window to receive this signal.

2) emit this signal in the slot function of the button of the subwindow.

3) Connect the signal of the child window to your own response slot in the parent window.

Child window. class childwindow : public qwidget

q_object

public:

childwindow(qwidget* p = 0)

qwidget(p)

qvboxlayout* l = new qvboxlayout(this);

qpushbutton* btn = new qpushbutton("btn", this);

l->addwidget(btn);

connect(btn, signal(clicked())slot(clickedbtn())

signals:

This signal is sent to the parent window.

void childwindowevent();

protected slots:

Click the slot button in the subwindow

void clickedbtn()

The signal that triggers the child window is received by the parent window.

emit childwindowevent();

Parent window. class parentwindow : public qwidget

q_object

public:

parentwindow(qwidget* p = 0)

qwidget(p)

qvboxlayout* l = new qvboxlayout(this);

w = new childwindow(this);

l->addwidget(w);

Connect the signal of the child window to the parent window.

connect(w, signal(childwindowevent())slot(childwindoweventslot())

protected:

childwindow* w;

protected slots:

The slot used by the parent window to receive signals from the child window.

void childwindoweventslot()

The button for the subwindow was clicked.

What do you mean? Have the child window button respond to the slot function on the parent window.

You can use exec() directly to display the form.

You can also setModel(true) first; Then in show(); to display.

Let's say the main window is w

The sub-window is d after clicking w->hide

d->show

a a in the parent window; Child window.

Child window. emit xinhao(qstring...

If you just can't press any buttons, just set enable(false) all the buttons of the parent window when the child window is open. The specific implementation is not too complicated, and you can definitely do macro model digging. Of course, if the child window inherits from qwidget, then the parent can be set directly as the main window in the build timecode.

The ability to express oneself is limited, and the landlord's mailbox is pasted to give you the program.

It's a very simple program, LZ writes it yourself......

Roughly as follows: first customize a class, inherited from qwidget, this class has qpushbutton, qlineedit two subcomponents, and then customize a slot function to modify qlineedit Chinese content, and then use a connect to connect the clicked() signal of qpushbutton with the custom slot.