QT crashed when I try to do onglets->setCurrentIndex(0);
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#ifndef MAINWINDOW_H
#define MAINWINDOW_H#include <QMainWindow>
class DiagramScene;
QT_BEGIN_NAMESPACE
class QAction;
class QToolBox;
class QSpinBox;
class QComboBox;
class QFontComboBox;
class QButtonGroup;
class QLineEdit;
class QGraphicsTextItem;
class QFont;
class QToolButton;
class QAbstractButton;
class QGraphicsView;
class QTabWidget;
QT_END_NAMESPACEclass MainWindow : public QMainWindow
{
Q_OBJECTpublic:
MainWindow();public slots:
void playaction();private slots:
void sendToBack();
void about();
void setVariables(const QString &newValue);private:
void createActions();
void createMenus();
void createToolbars();
void createVertbars();/*QGraphicsView *view;*/ QAction *exitAction; QAction *addAction; QAction *toFrontAction; QAction *sendBackAction; QAction *aboutAction; QAction *toPlayAction; QMenu *fileMenu; QMenu *itemMenu; QMenu *aboutMenu;QToolBar *textToolBar;
QToolBar *editToolBar;
QToolBar *pointerToolbar;QComboBox *sceneScaleCombo; QComboBox *fontSizeCombo; QFontComboBox *fontCombo; QToolBar *fontToolBar; QLineEdit *textbox; QWidget *fenetre; QWidget *page1; QWidget *page2; QWidget *page3; QTabWidget *onglets;};
#endif // MAINWINDOW_H
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MainWindow::MainWindow()
{
createActions();
createMenus();
createToolbars();
createVertbars();QVBoxLayout *layout = new QVBoxLayout; QWidget *widget = new QWidget; widget->setLayout(layout); widget->setStyleSheet("padding: 10px;" "border-style: solid;" "border-width: 5px;" "border-radius: 4px;"); setCentralWidget(widget); /****************************/ QWidget fenetre; // 1 : Créer le QTabWidget QTabWidget *onglets = new QTabWidget(&fenetre); onglets->setGeometry(30, 20, 240, 160); // 2 : Créer les pages, en utilisant un widget parent pour contenir chacune des pages QWidget *page1 = new QWidget; QWidget *page2 = new QWidget; QLabel *page3 = new QLabel; // Comme un QLabel est aussi un QWidget (il en hérite), on peut aussi s'en servir de page // 3 : Créer le contenu des pages de widgets // Page 1 /*QLineEdit *lineEdit = new QLineEdit("Entrez votre nom"); QPushButton *bouton1 = new QPushButton("Cliquez ici"); QPushButton *bouton2 = new QPushButton("Ou là…");*/ QVBoxLayout *vbox1 = new QVBoxLayout; /*vbox1->addWidget(lineEdit); vbox1->addWidget(bouton1); vbox1->addWidget(bouton2);*/ /* View pie chart */ QPieSeries *series1 = new QPieSeries(); series1->setName("Fossil fuels"); series1->append("Oil", 353295); series1->append("Coal", 188500); series1->append("Natural gas", 148680); series1->append("Peat", 94545); QPieSeries *series2 = new QPieSeries(); series2->setName("Renewables"); series2->append("Wood fuels", 319663); series2->append("Hydro power", 45875); series2->append("Wind power", 1060); QPieSeries *series3 = new QPieSeries(); series3->setName("Others"); series3->append("Nuclear energy", 238789); series3->append("Import energy", 37802); series3->append("Other", 32441); DonutBreakdownChart *donutBreakdown = new DonutBreakdownChart(); donutBreakdown->setAnimationOptions(QChart::AllAnimations); donutBreakdown->setTitle("Total consumption of energy in Finland 2010"); donutBreakdown->legend()->setAlignment(Qt::AlignRight); donutBreakdown->addBreakdownSeries(series1, Qt::red); donutBreakdown->addBreakdownSeries(series2, Qt::darkGreen); donutBreakdown->addBreakdownSeries(series3, Qt::darkBlue); QChartView *chartView = new QChartView(donutBreakdown); chartView->setRenderHint(QPainter::Antialiasing); vbox1->addWidget(chartView); /**/ page1->setLayout(vbox1); // Page 2 QProgressBar *progress = new QProgressBar; progress->setValue(50); QSlider *slider = new QSlider(Qt::Horizontal); QPushButton *bouton3 = new QPushButton("Valider"); QVBoxLayout *vbox2 = new QVBoxLayout; /*vbox2->addWidget(progress); vbox2->addWidget(slider); vbox2->addWidget(bouton3);*/ page2->setLayout(vbox2); // Page 3 (je ne vais afficher qu'une image ici, pas besoin de layout) page3->setPixmap( QPixmap (":/images/qt5.png") ); page3->setAlignment(Qt::AlignCenter); // 4 : ajouter les onglets au QTabWidget, en indiquant la page qu'ils contiennent onglets->addTab(page1, "Graphe"); onglets->addTab(page2, "Stats"); onglets->addTab(page3, "Info-app"); /***************************/ onglets->setLayout(layout); setCentralWidget(onglets); setWindowTitle(tr("TEST")); setUnifiedTitleAndToolBarOnMac(true); onglets->setCurrentIndex(0);}
@f.lerdino
I have no idea whether this matters/causes your problem, but you seem to have:setCentralWidget(widget); ... setCentralWidget(onglets);Is that right?
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Hi
you are doing that i ask in first post.You have
QTabWidget *onglets; in h file but new another so that is why you crash./****************************/
QWidget fenetre; // this ones DIES as soon as functions ends. not good.// 1 : Créer le QTabWidget
QTabWidget *onglets = new QTabWidget(&fenetre); THis one create a local variable,It is not the one from .H ( and it cant be used outside the function)
So that is why you crash.
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@f.lerdino One more issue is you create a local QWidget on the stack in the constructor:
QWidget fenetre; QTabWidget *onglets = new QTabWidget(&fenetre); `` That means it will be destroyed when the constructor finishes. -
Hi
you are doing that i ask in first post.You have
QTabWidget *onglets; in h file but new another so that is why you crash./****************************/
QWidget fenetre; // this ones DIES as soon as functions ends. not good.// 1 : Créer le QTabWidget
QTabWidget *onglets = new QTabWidget(&fenetre); THis one create a local variable,It is not the one from .H ( and it cant be used outside the function)
So that is why you crash.
Purely OOI: I don't use Qt Creator/C++, but in this case where there is a class member variable named
fooand then a function local variable also namedfoois declared, does the Qt Creator "squiggle underline" the local variable warning that it "overrides the class variable", for the OP to notice? My PyCharm/Python IDE does do that.... -
Purely OOI: I don't use Qt Creator/C++, but in this case where there is a class member variable named
fooand then a function local variable also namedfoois declared, does the Qt Creator "squiggle underline" the local variable warning that it "overrides the class variable", for the OP to notice? My PyCharm/Python IDE does do that.... -
@JonB
:)))
I would - if you give me visible scopes and remove that dreadful Self.
and what is up with ___Var to say its private :)
Joking aside, its really a nice editor. I assume the Pro version is even more
cool than the Community version.
