SoQtExaminerViewer alway has black SceneGraph

[saiwing]

I compiled Coin3d 4.0.3 & Soqt 1.6.3 based on Qt6.3.2, everything goes well during compiling, but when I test Soqt example, it can't display correctly

#include <Inventor/Qt/SoQt.h>
#include <Inventor/Qt/viewers/SoQtExaminerViewer.h>
#include <Inventor/nodes/SoBaseColor.h>
#include <Inventor/nodes/SoCone.h>
#include <Inventor/nodes/SoSeparator.h>

int main(int argc, char ** argv)
{
    // Initializes SoQt library (and implicitly also the Coin and Qt
    // libraries). Returns a top-level / shell Qt window to use.
    QWidget * mainwin = SoQt::init(argc, argv, argv[0]);

    // Make a dead simple scene graph by using the Coin library, only
    // containing a single yellow cone under the scene graph root.
    SoSeparator * root = new SoSeparator;
    root->ref();

    SoBaseColor * col = new SoBaseColor;
    col->rgb = SbColor(1, 1, 0);
    root->addChild(col);

    root->addChild(new SoCone);

    // Use one of the convenient SoQt viewer classes.
    SoQtExaminerViewer * eviewer = new SoQtExaminerViewer(mainwin);
    eviewer->setSceneGraph(root);
    eviewer->show();

    // Pop up the main window.
    SoQt::show(mainwin);
    // Loop until exit.
    SoQt::mainLoop();

    // Clean up resources.
    delete eviewer;
    root->unref();
    SoQt::done();

    return 0;
}

for Soqt's test_code, only "tripleview" has correct display, while all other demos have same problem

I found similar issue( high res screen problems #1 ), but set QT_SCREEN_SCALE_FACTOR has no effort for me

[saiwing]

I found that if I change SoQtExaminerViewer constructor's 'build' from FALSE to TRUE, it can display the shape, but the tool icons on the right don't work, and the cone can't rotate, I don't know if it is correct

SoQtExaminerViewer::SoQtExaminerViewer(QWidget * parent,
                                       const char * name,
                                       SbBool embed,
                                       SoQtFullViewer::BuildFlag flag,
                                       SoQtViewer::Type type) 
: inherited(parent, name, embed, flag, type, TRUE) // FALSE -> TRUE 
{
  PRIVATE(this) = new SoQtExaminerViewerP(this);
  PRIVATE(this)->constructor(TRUE);
}

[saiwing]

inspired by demo tripleview.cpp, I find if SoQtExaminerViewer >= 2, the program work, even though the inetration like zooming, rotating etc. not smoothing.

int main(int argc, char ** argv)
{
    QWidget *mainWin = SoQt::init(argc, argv, argv[0]);
    mainWin->resize(640, 480);

    // Set up the Qt widget layout data.
    QHBoxLayout *hlayout = new QHBoxLayout(mainWin);
    QGroupBox *view0 = new QGroupBox(mainWin);
    hlayout->addWidget(view0, 0.5);
    QGroupBox *view1 = new QGroupBox(mainWin);
    hlayout->addWidget(view1, 0.5);

    if(1) {
        SoSeparator *root = new SoSeparator;
        SoDirectionalLight *light = new SoDirectionalLight;
        root->addChild(light);

        SoCube *cube = new SoCube;
        root->addChild(cube);

        SoQtExaminerViewer *eviewer = new SoQtExaminerViewer(view0);
        eviewer->setSceneGraph(root);
        eviewer->setBackgroundColor(SbColor(0.5, 0.0, 0.5));
    }

    if(1) {
        SoSeparator *root = new SoSeparator;
        SoDirectionalLight *light = new SoDirectionalLight;
        root->addChild(light);

        SoCube *cube = new SoCube;
        root->addChild(cube);

        SoQtExaminerViewer * eviewer = new SoQtExaminerViewer(view1);
        eviewer->setSceneGraph(root);
        eviewer->setBackgroundColor(SbColor(0.5, 0.0, 0.5));
    }

    SoQt::show(mainWin);
    SoQt::mainLoop();

    return 0;
}

[VolkerEnderlein]

Thanks for the report. I am not aware that the SoQt examiner viewer is broken. I'll have a look onto the issue but unfortunatly not before monday.

[VolkerEnderlein]

I just tested the app and all the examples with Qt 6.6.0 as I did not have Qt version 6.3 around, but it works flawlessly as expected.