Adding QML to QMdiArea as subwindow

davidesalvetti

Hi guys,

I have a satellite map in qml and what I need to do is just put into my existing MdiArea a subwindow that contains this qml satellite map.

Here is my code

     //pWidget is a TabWidget that contains the MDIArea where I want to put my map   
    QDialog *dial = new QDialog(pWidget);      

    QQuickView *view = new QQuickView;

    QWidget *container = QWidget::createWindowContainer(view);
    container->setMinimumSize(200, 200);
    container->setMaximumSize(700, 700);

    QVBoxLayout *layout = new QVBoxLayout(dial);
    layout->setContentsMargins(0,0,0,0);
    layout->addWidget(container);            //I add the container widget where tha map should be into the layout

    view->setSource(QUrl("qrc:/qml/MapTrack.qml"));     //Set the qml map

    QMdiSubWindow *graf = pArea->addSubWindow(dial);   // I Create the subwindow, pArea is an MDIArea
    graf->show();

When I run this code I see that another window is created but not into the MDIArea, then the program crushes.

Debugging I get this error:

"QML Debugger: Waiting for connection on port 50712...
ASSERT: "!m_thread.isRunning()" in file qqmldebugserver.cpp, line 655"

I really don't know what's wrong with this code, any help is appreciated.

Thanks in advance.

VRonin

@davidesalvetti said in Adding QML to QMdiArea as subwindow:

QVBoxLayout *layout = new QVBoxLayout(container);
layout->addWidget(container);

You are trying to insert container inside its own layout.
i guess you meant QVBoxLayout *layout = new QVBoxLayout(dial); and you are free to remove dial->setLayout(layout); once you did that

davidesalvetti

@VRonin Yeah, I'm sorry, I already found that error but I forgot to update my code.

Anyway it still doesn't work: same error.
I can't understand why.

VRonin

Let's try narrowing down the problem:
Try this and tell us if it works

 QDialog *dial = new QDialog;      
    QQuickView *view = new QQuickView;
    QWidget *container = QWidget::createWindowContainer(view);
    QVBoxLayout *layout = new QVBoxLayout(dial);
    layout->addWidget(container);
    view->setSource(QUrl("qrc:/qml/MapTrack.qml"));
dial->exec();
dial->deleteLater();

davidesalvetti

@VRonin said in Adding QML to QMdiArea as subwindow:

QDialog *dial = new QDialog;
QQuickView *view = new QQuickView;
QWidget *container = QWidget::createWindowContainer(view);
QVBoxLayout *layout = new QVBoxLayout(dial);
layout->addWidget(container);
view->setSource(QUrl("qrc:/qml/MapTrack.qml"));
dial->exec();
dial->deleteLater();

Same error.
Debugging I found that the program crushes when executing the:

view->setSource(QUrl("qrc:/qml/MapTrack.qml"));

I'm wondering if the program doesn't see the resource file but I don't know why. This is the Resources structure. I simply click the right button on MapTrack.qml and I get the URL I use.

![alt text]( image url)

Maybe the problem is the QML file? This is the code:

import QtQuick.Controls 1.4
import QtQuick.Window 2.0
import QtLocation 5.6
import QtPositioning 5.6

Window {
    id: mainWindow
    width: 512
    height: 512
    visible: true

    ListModel{
        id:dummyModel
        ListElement {
            Latitude: 47.212047
            Longitude: -1.551647
            Label: "something"
            Orientation: 0
            Color:"transparent"
        }
   }

    Plugin {
        id: googleMaps
        name: "googlemaps" // "mapboxgl", "esri", ...
        // specify plugin parameters if necessary
        // PluginParameter {
        //     name:
        //     value:
        // }

    }

    Map {
        id: myMap
        anchors.fill: parent
        plugin: googleMaps
        activeMapType: supportedMapTypes[1]

        center: QtPositioning.coordinate(59.91, 10.75) // Oslo
        zoomLevel: 14

        MapItemView{
            id:dynamicMapObject
            model: dummyModel
            delegate: MapQuickItem {
                coordinate: QtPositioning.coordinate(Latitude,Longitude)
                sourceItem:  Text{
                    width: 100
                    height: 50
                    text: model.Label
                    rotation: model.Orientation
                    opacity: 0.6
                    color: model.Color
                }
            }
        }

        MapPolyline {
                line.width: 3
                line.color: 'green'
                path: [
                    { latitude: 59.92, longitude: 10.77 },
                    { latitude: 59.96, longitude: 10.78 },
                    { latitude: 59.99, longitude: 10.76 },
                    { latitude: 59.95, longitude: 10.74 }
                ]
        }

        MapCircle {
          //a static item (fixed real dimension) always at 100m east of the map center
          id:prova
          center: myMap.center.atDistanceAndAzimuth(100,90)
          opacity:0.8
          color:"red"
          radius:30

        }
    }

    MouseArea {
           anchors.fill: parent
           acceptedButtons:  Qt.RightButton

           onClicked: {
                if (mouse.button === Qt.RightButton)
                {

                    dummyModel.append({
                        "Latitude": myMap.toCoordinate(Qt.point(mouseX,mouseY)).latitude ,"Longitude": myMap.toCoordinate(Qt.point(mouseX,mouseY)).longitude ,
                        "Label": "abc" , "Color": "red",
                        "Orientation":Number(3), })
                }
           }
    }

    GroupBox{
           title:"map types"
           ComboBox{
               model:myMap.supportedMapTypes
               textRole:"description"
               onCurrentIndexChanged: myMap.activeMapType = myMap.supportedMapTypes[currentIndex]
           }
     }
}

VRonin

can you try:

re running qmake
use just a very simple QML source. just a single text for example

davidesalvetti

@VRonin I made some test from my side. I tried both your suggestions but they didn't worked.
Luckily I found a possible workaround that works.

I have created a QDialog class like this:

SatelliteMap::SatelliteMap(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::SatelliteMap)
{
    ui->setupUi(this);
    setAttribute(Qt::WA_DeleteOnClose);

    view = new QQuickView();
    view->setResizeMode(QQuickView::SizeRootObjectToView);
    container = QWidget::createWindowContainer(view, this);
    container->setFocusPolicy(Qt::TabFocus);
    view->setSource(QUrl("qrc:/qml/qml/MapTrack.qml"));

    ui->verticalLayout->addWidget(container);
}

After this I created a QMdiSubWindow of the QDialog above.
I really don't understand why it works this way. Anyway Thanks for the attention.

SGaist

Hi,

What about QQuickWidget ?