[英]How to set property of button to visible from widget in Qt
I have one window which includes all the buttons and there are some buttons that are hidden. 我有一个窗口,其中包含所有按钮,还有一些隐藏的按钮。
Now I want set visibility to true from another dialog. 现在我希望从另一个对话框中将set visibility设置为true。
How to do it? 怎么做? I have googled it but I am unable to solve this problem. 我用谷歌搜索了它,但我无法解决这个问题。
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "rams.h"
#include "abtdev.h"
#include "syllabus.h"
#include "login.h"
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
setWindowFlags(Qt::Window | Qt::FramelessWindowHint);
QMainWindow::showFullScreen();
**ui->but_save->setHidden(true);
ui->but_delete1->setHidden(true);
ui->but_delete2->setHidden(true);
ui->but_upload1->setHidden(true);
ui->but_upload2->setHidden(true);**
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::on_but_abt_clicked()
{
abtdev a;
a.exec();
}
void MainWindow::on_but_Syllabus_clicked()
{
syllabus s;
s.showFullScreen();
s.exec();
}
void MainWindow::on_but_admin_clicked()
{
login objlogin;
objlogin.exec();
}
void MainWindow::on_but_rams_clicked()
{
// rams ramswin;
// ramswin.showFullScreen();
// ramswin.exec();
}
And I want it appear after this dialog box get completed! 我希望它在此对话框完成后显示!
#include "login.h"
#include "ui_login.h"
#include<QTimer>
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include<QObject>
login::login(QWidget *parent) :
QDialog(parent),
ui(new Ui::login)
{
ui->setupUi(this);
setWindowFlags(Qt::Window | Qt::FramelessWindowHint);
QTimer::singleShot(60000, this, SLOT(close()));
ui->password->setEchoMode(QLineEdit::Password);
}
login::~login()
{
delete ui;
}
void login::on_ok_clicked()
{
QString username = ui->username->text();
QString password = ui->password->text();
if(username == "123" && password == "123")
{
***HERE, after this block executed i want that buttons visible on mainwindow***
}
else
{
ui->label_4->setText("Username and password is not correct !!");
}
}
The code you need is next: 您需要的代码是下一个:
Supposing that you call your dialog for example from MainWindow::on_but_admin_clicked()
function: 假设您从MainWindow::on_but_admin_clicked()
函数调用对话框,例如:
On mainwindow.cpp 在mainwindow.cpp上
void MainWindow::on_but_admin_clicked()
{
//Declare a private object in your mainwindow.h like this:
//login* objlogin;
objlogin = new login();
//Connect signals to later call the method setHiden(false)
QObject::connect(objlogin, SIGNAL(stackoverflowAnswer()), this, SLOT(makeVisible()));
objlogin->show();
}
//...
// The function that will be called from login dialog to enable hidden buttons
void MainWindow::makeVisible()
{
ui->but_save->setHidden(false);
ui->but_delete1->setHidden(false);
ui->but_delete2->setHidden(false);
ui->but_upload1->setHidden(false);
ui->but_upload2->setHidden(false);
}
On login.cpp (on_ok_clicked() function) : 在login.cpp (on_ok_clicked()函数) :
void login::on_ok_clicked()
{
QString username = ui->username->text();
QString password = ui->password->text();
if(username == "123" && password == "123")
{
***HERE, after this block executed i want that buttons visible on mainwindow***
emit stackoverflowAnswer();
//...
Remember to declare in login.h the signals and slots: 记得在login.h中声明信号和插槽:
signals:
void stackoverflowAnswer();
private slots:
void on_ok_clicked();
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