(several qdockWidget) QWidget::repaint: Recursive repaint detected kernel\qwidget.cpp: 5557

[halima]

I need your help please!

I have 8 dockwidget in my Qmainwindow without a centralwidget, when I try to move, float, and undock dockwidget that contains a 3D view, the program crash with segmentation fault!

I remain at your disposal for more information, thanks a lot!

SUB_WIN_3D_VIEW.cpp  
/* -----------------------
 * ----------------------- */

#include "sub_win_3dview.h"
#include <QtWidgets/QAction>
#include <iostream>
#include <QDesktopServices>

SUB_WIN_3D_VIEW::SUB_WIN_3D_VIEW(Mainwindow const& p) : QDockWidget(),mainwindow_ins(p)
{
    ui.setupUi(this);
    this->setWindowTitle("3D view");
    // Initiate the 3D scene
    view.defaultFrameGraph()->setClearColor(QColor("#FFC0CBD9")); // light blue
    widget = QWidget::createWindowContainer(&view);
    view.renderSettings()->pickingSettings()->setPickMethod(Qt3DRender::QPickingSettings::TrianglePicking);  
    // Initiate the root entity (all the other entities of the scene should
    // inherit it to be part of the 3D scene
    rootEntity = new Qt3DCore::QEntity;
    input = new Qt3DInput::QInputAspect;
    view.setRootEntity(rootEntity);
    view.registerAspect(input);

    // Get the default camera entity from view
    cameraEntity = view.camera();
    // Set Z the be the vertical axis
    cameraEntity->setUpVector(QVector3D(0, 0, 1));
    // Initiate the camera controller
    MyOrbitCameraController *camController = new MyOrbitCameraController(rootEntity);
    camController->setCamera(cameraEntity);
    camController->setLookSpeed(-300);
    camController->setLinearSpeed(12);

    // Initiate the light entity with its components below
    lightEntity = new Qt3DCore::QEntity(rootEntity);

    Qt3DRender::QPointLight *lightPoint = new Qt3DRender::QPointLight(lightEntity);
    lightPoint->setColor("white");
    lightPoint->setIntensity(1);

    Qt3DCore::QTransform *lightTransform = new Qt3DCore::QTransform(lightEntity);
    lightTransform->setTranslation(QVector3D(20, 20, 20));

    lightEntity->addComponent(lightPoint);
    lightEntity->addComponent(lightTransform);

    // Initiate the modifier of the scene
    modifier = new SceneModifier(rootEntity, cameraEntity);
    modifier->pb_sl_reset();

    view3d->widget->setMinimumSize(QSize(200, 100));
    QSizePolicy view3d_siz(QSizePolicy::Expanding, QSizePolicy::Expanding);
    widget->setSizePolicy(view3d_siz);

    // Add the widget to a layout attached to the UI
    ui.verticalLayout_2->addWidget(widget);
    modifier->pb_sl_loadModel("simple");
    connect(ui.Reload, SIGNAL(clicked(bool)),this, SLOT(reload_clicked()));
    connect(ui.btn_CubeMiddle, SIGNAL(clicked(bool)),this, SLOT(cubeMiddle_clicked()));
    connect(ui.btn_ObjUp, SIGNAL(clicked(bool)),this, SLOT(objUp_clicked()));
    connect(ui.btn_ObjLeft, SIGNAL(clicked(bool)),this, SLOT(objLeft_clicked()));
    connect(ui.btn_ObjRight, SIGNAL(clicked(bool)),this, SLOT(objRight_clicked()));
    connect(ui.btn_ShowAxis, SIGNAL(clicked(bool)),this, SLOT(showAxis_clicked()));}
SUB_WIN_3D_VIEW::~SUB_WIN_3D_VIEW()
{

}


void SUB_WIN_3D_VIEW::reload_clicked()
{
    // Reload's button simply load the same model again
    modifier->pb_sl_loadModel("simple");
}

void SUB_WIN_3D_VIEW::cubeMiddle_clicked()
{
    modifier->pb_sl_cameraMiddle();
}

void SUB_WIN_3D_VIEW::objUp_clicked()
{
    modifier->pb_sl_cameraUp();
}

void SUB_WIN_3D_VIEW::objLeft_clicked()
{
    modifier->pb_sl_cameraLeft();
}

void SUB_WIN_3D_VIEW::objRight_clicked()
{
    modifier->pb_sl_cameraRight();
}

void SUB_WIN_3D_VIEW::showAxis_clicked()
{
    modifier->pb_sl_enableRef(ui.btn_ShowAxis->isChecked());
}



#include "moc_sub_win_3dview.cpp"

Errors:

In file ....\include/QtCore/../../src/corelib/global/qglobal.h, line 770: Out of memory
Invalid parameter passed to C runtime function.
Invalid parameter passed to C runtime function.
QWidget::repaint: Recursive repaint detected

createDIB: CreateDIBSection failed.
Invalid parameter passed to C runtime function.
Invalid parameter passed to C runtime function.
QWaitCondition: Destroyed while threads are still waiting

[raven-worx]

@halima
what are the contents of the qdockwidgets? Custom widgets?
It seems you are calling repaint() (directly or indirectly) inside a paintEvent()?

[halima]

@raven-worx in my dockwidgets i have a 3D view primarily, qml for custom widget , and o lot of other widgets.
i don't use the paintEvent()

[SGaist]

Hi and welcome to devnet,

Can you determine exactly which of these docks triggers the crash ?
What content does it have ?

[halima]

@SGaist Hi SGaist thank you for reply.
the dockwidget containing a 3D view . Because when i disable it i don't have this problem .

[SGaist]

What kind of 3D view is it ?

[halima]

I solved the problem by modifying the qml code, before it was like that :

file.h
 QQuickWidget *m_quickWidget_gauge_2;
    QObject *object_gauge_2 ;
    QQuickWidget *m_quickWidget_gauge_3;
    QObject *object_gauge_3 ;
    QQuickWidget *m_quickWidget_gauge_4;
    QObject *object_gauge_4 ;

file.cpp
//QQuickWidget : actuator number 1
    m_quickWidget_gauge_1 = new QQuickWidget(this) ;
    m_quickWidget_gauge_1->setSource(QUrl("qrc:/Resources/res/gauge.qml"));
    m_quickWidget_gauge_1->setResizeMode(QQuickWidget::SizeRootObjectToView);
    m_quickWidget_gauge_1->setMinimumHeight(30);
    m_quickWidget_gauge_1->setMinimumWidth(150);
    m_quickWidget_gauge_1->setAttribute(Qt::WA_AlwaysStackOnTop);
    m_quickWidget_gauge_1->setClearColor(Qt::transparent);
    ui.horizontalLayout_al_1->addWidget(m_quickWidget_gauge_1, 1, Qt::AlignTop);
    //QQuickWidget : actuator number 2
    m_quickWidget_gauge_2 = new QQuickWidget(this) ;
    m_quickWidget_gauge_2->setSource(QUrl("qrc:/Resources/res/gauge.qml"));
    m_quickWidget_gauge_2->setResizeMode(QQuickWidget::SizeRootObjectToView);
    m_quickWidget_gauge_2->setMinimumHeight(30);
    m_quickWidget_gauge_2->setMinimumWidth(150);
    m_quickWidget_gauge_2->setAttribute(Qt::WA_AlwaysStackOnTop);
    m_quickWidget_gauge_2->setClearColor(Qt::transparent);
    ui.horizontalLayout_al_2->addWidget(m_quickWidget_gauge_2, 1, Qt::AlignTop);
    //QQuickWidget : actuator number 3
[....]

I made these changes and it works!!

file.h 
 QQuickView *m_qmlview_gauge_1;
 QQuickView *m_qmlview_gauge_2;
 QQuickView *m_qmlview_gauge_3;

file.cpp
  m_qmlview_gauge_1 = new QQuickView(QUrl("qrc:/Resources/res/qml/actuator_gauge.qml"));
    m_qmlview_gauge_1->setColor(QColor(Qt::white));
    QWidget *container = QWidget::createWindowContainer(m_qmlview_gauge_1);
    container->setSizePolicy(QSizePolicy::Preferred,QSizePolicy::Expanding);
    ui.verticalLayout_11->addWidget(container);

    m_qmlview_gauge_2 = new QQuickView(QUrl("qrc:/Resources/res/qml/actuator_gauge.qml"));
    m_qmlview_gauge_2->setColor(QColor(Qt::white));
    QWidget *container_1 = QWidget::createWindowContainer(m_qmlview_gauge_2);
    container_1->setSizePolicy(QSizePolicy::Preferred,QSizePolicy::Expanding);
    ui.verticalLayout_12->addWidget(container_1);

    m_qmlview_gauge_3 = new QQuickView(QUrl("qrc:/Resources/res/qml/actuator_gauge.qml"));
    m_qmlview_gauge_3->setColor(QColor(Qt::white));
    QWidget *container_2 = QWidget::createWindowContainer(m_qmlview_gauge_3);
    container_2->setSizePolicy(QSizePolicy::Preferred,QSizePolicy::Expanding);
    ui.verticalLayout_13->addWidget(container_2);

i still not understand why the old code cause this crash, it worked well before !!

[SGaist]

Did you change something in between ? Qt version ? Windows version ? Video driver version ?

[halima]

@SGaist I updated the graphic driver.
Please can you tell me if there is nothing wrrong in my code because sometimes the problem is reproduced :(
should i delete this variables in the destructor?

QQuickView *m_qmlview_gauge_1;
QQuickView *m_qmlview_gauge_2;
QQuickView *m_qmlview_gauge_3;

[SGaist]

Then you should consider downgrading the video driver.

AFAIK, you don't need to delete them as the container takes ownership of the window you pass to it. See QWidget::createWindowContainer.

[halima]

@SGaist
it's the graphics driver that did that. Thank you.