1
Не знаете, почему это не работает, но connect (кнопка, SIGNAL (нажата()), это, SLOT (addMenu())); принудительно закрывает приложение, когда я нажимаю кнопку.Qt - сила закрытия при нажатии кнопки (проблема с сигналом/слотом)
mainview.h
#ifndef MAINVIEW_H
#define MAINVIEW_H
#include <QtGui/QMainWindow>
#include <QtGui/QScrollArea>
#include <QtGui/QFrame>
#include <QtGui/QVBoxLayout>
#include <QtGui/QPushButton>
#include <QtGui/QLabel>
#include <QtGui/QLineEdit>
#include <QtGui/QGroupBox>
#include <QtGui/QFormLayout>
#include <QtGui/QMessageBox>
#include <QtCore/QPointer>
#include <QtCore/QFile>
#include <QtCore/QIODevice>
#include <QtCore/QList>
#include <QtCore/QMap>
#include <QtCore/QString>
#include <QtXml/QXmlStreamReader>
#include <QtDebug>
#include <QBool>
#include <QSignalMapper>
#include <QStackedLayout>
#include <QSize>
#include <QPalette>
//
// MainView
//
class MainView: public QMainWindow {
Q_OBJECT
public:
MainView(QWidget *parent = 0);
~MainView();
private:
void buildTabMenuBar(int index);
public slots:
void activeTabChanged(int index);
signals:
private:
QTabWidget* tabWidget;
};
//
// Tab1
//
class QMyWidget1: public QWidget {
Q_OBJECT
public:
QMyWidget1(QWidget *parent = 0);
~QMyWidget1();
public slots:
void runOnTabSelect();
void addMenu();
signals:
private:
QPointer<QVBoxLayout> _layout;
QPointer<QVBoxLayout> _layoutToAdd;
};
#endif // MAINVIEW_H
mainview.cpp
#include "mainview.h"
#include <QtGui>
#include <QApplication>
#include <QPixmap>
#include <QSize>
//
// Tabs Main
//
MainView::MainView(QWidget *parent) : QMainWindow(parent) {
setContextMenuPolicy(Qt::NoContextMenu);
this->setWindowTitle("Main");
//create tabwidget
tabWidget = new QTabWidget(this);
//tab changes
QObject::connect(tabWidget, SIGNAL(currentChanged(int)),this, SLOT(activeTabChanged(int)));
//tab 1
QMyWidget1* widget1 = new QMyWidget1();
QScrollArea* scroll1 = new QScrollArea();
scroll1->setBackgroundRole(QPalette::Dark);
scroll1->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
scroll1->setWidget(widget1);
tabWidget->addTab(scroll1, "Tab1");
//create stacked layout
QStackedLayout *stackedLayout = new QStackedLayout;
//add widgets to stack
stackedLayout->addWidget(tabWidget);
//make fullscreen eventually, won't do this automatically
stackedLayout->setGeometry(QRect(0,0,350,600));
QVBoxLayout *_layout = new QVBoxLayout;
_layout->addLayout(stackedLayout);
setLayout(_layout);
//remove context menu from all widgets
#ifdef Q_OS_SYMBIAN
QWidgetList widgets = QApplication::allWidgets();
QWidget* w = 0;
foreach(w,widgets) {
w->setContextMenuPolicy(Qt::NoContextMenu);
}
#endif
}
MainView::~MainView() {
}
void MainView::activeTabChanged(int index) {
//active tab
buildTabMenuBar(index);
}
void MainView::buildTabMenuBar(int index) {
//clear current menu
QMenuBar* menubar = menuBar();
menubar->clear();
//build new menu into active tab
switch (index) {
case 0:
{
menubar->addAction("", tabWidget->widget(index), SLOT(runOnTabSelect()));
break;
}
default:
{
break;
}
};
}
//
// Tab1 Content
//
QMyWidget1::QMyWidget1(QWidget *parent) : QWidget(parent) {
setContextMenuPolicy(Qt::NoContextMenu);
QVBoxLayout* _layout = new QVBoxLayout(this);
//make button
QPushButton* button = new QPushButton("Just a button");
button->setStyleSheet("QPushButton { border-left: 1px solid white; border-right: 1px solid white; border-top: 1px solid white; border-bottom:none; border-radius: 3px; background-color: #404040; width: 350px; height:90px; font-size: 15px; font-family: georgia, garamond, serif; margin-bottom:3px; } QPushButton:pressed { background-color: white; }");
button->setIcon(QIcon("c://right_arrow.png"));
button->setLayoutDirection(Qt::LeftToRight);
button->setIconSize(QSize(32,32));
_layout->addWidget(button);
**connect(button, SIGNAL(clicked()), this, SLOT(addMenu()));**
this->setLayout(_layout);
}
QMyWidget1::~QMyWidget1() {
}
void QMyWidget1::runOnTabSelect() {
}
void QMyWidget1::addMenu() {
_layoutToAdd = new QVBoxLayout;
QPushButton* button = new QPushButton("New Button");
_layoutToAdd->addWidget(button);
_layout->insertLayout(0, _layoutToAdd, 0);
}