How to put QLabel over QWidget?

[kenchan]

Hello again,
That does not look like the whole code what does "this" refer to?
Did you copy this from the ui code and modify it?

[DrageFabeldyr]

this is QWidget

setGeometry works, i've commented resizeEvent code i can see all 4 messages in video1

ok, the whole code:

#include <VLCQtCore/Common.h>
#include <VLCQtCore/Instance.h>
#include <VLCQtCore/Media.h>
#include <VLCQtCore/MediaPlayer.h>
#include <VLCQtCore/Audio.h>

#include "SimplePlayer.h"
//#include "ui_SimplePlayer.h"

SimplePlayer::SimplePlayer(QWidget *parent) : QWidget(parent), _media1(0), _media2(0), _media3(0), _media4(0)
{
    open_Local = new QPushButton;
    open_Local->setText("open_Local");
    open_Url = new QPushButton;
    open_Url->setText("open_Url");

    video1 = new VlcWidgetVideo();
    video2 = new VlcWidgetVideo();
    video3 = new VlcWidgetVideo();
    video4 = new VlcWidgetVideo();

    video1->setMinimumSize(440, 260);
    video2->setMinimumSize(440, 260);
    video3->setMinimumSize(440, 260);
    video4->setMinimumSize(440, 260);

    _instance1 = new VlcInstance(VlcCommon::args(), this);
    _instance2 = new VlcInstance(VlcCommon::args(), this);
    _instance3 = new VlcInstance(VlcCommon::args(), this);
    _instance4 = new VlcInstance(VlcCommon::args(), this);

    _player1 = new VlcMediaPlayer(_instance1);
    _player1->setVideoWidget(video1);
    _player1->setObjectName("_player1");
    _player2 = new VlcMediaPlayer(_instance2);
    _player2->setVideoWidget(video2);
    _player2->setObjectName("_player2");
    _player3 = new VlcMediaPlayer(_instance3);
    _player3->setVideoWidget(video3);
    _player3->setObjectName("_player3");
    _player4 = new VlcMediaPlayer(_instance4);
    _player4->setVideoWidget(video4);
    _player4->setObjectName("_player4");

    video1->setMediaPlayer(_player1);
    video2->setMediaPlayer(_player2);
    video3->setMediaPlayer(_player3);
    video4->setMediaPlayer(_player4);

    _player1->audio()->setMute(true);
    _player2->audio()->setMute(true);
    _player3->audio()->setMute(true);
    _player4->audio()->setMute(true);

    label1 = new QLabel(video1);
    label2 = new QLabel(video2);
    label3 = new QLabel(video3);
    label4 = new QLabel(video4);

    label1->setText("qwer");
    label1->setStyleSheet("color: red; font: bold 14px; qproperty-alignment: AlignCenter;");
    label2->setText("asdf");
    label2->setStyleSheet("color: red; font: bold 14px; qproperty-alignment: AlignCenter;");
    label3->setText("zxcv");
    label3->setStyleSheet("color: red; font: bold 14px; qproperty-alignment: AlignCenter;");
    label4->setText("1234");
    label4->setStyleSheet("color: red; font: bold 14px; qproperty-alignment: AlignCenter;");

/*
    int x = video2->geometry().center().x() - warn_w / 2;
    int y = video2->geometry().center().y() - warn_h / 2;
*/
    label1->setGeometry(100, 50, warn_w, warn_h);
    label2->setGeometry(100, 100, warn_w, warn_h);
    label3->setGeometry(100, 150, warn_w, warn_h);
    label4->setGeometry(100, 200, warn_w, warn_h);
    /*
    label1->setGeometry(video2->geometry().center().x() - warn_w / 2, video2->geometry().center().y() - warn_h / 2, warn_w, warn_h);
    label2->setGeometry(video2->geometry().center().x() - warn_w / 2, video2->geometry().center().y() - warn_h / 2, warn_w, warn_h);
    label3->setGeometry(video2->geometry().center().x() - warn_w / 2, video2->geometry().center().y() - warn_h / 2, warn_w, warn_h);
    label4->setGeometry(video2->geometry().center().x() - warn_w / 2, video2->geometry().center().y() - warn_h / 2, warn_w, warn_h);
    */
/*
    label1->hide();
    label2->hide();
    label3->hide();
    label4->hide();
*/
    connect(open_Local, &QPushButton::clicked, this, &SimplePlayer::openLocal);
    connect(open_Url, &QPushButton::clicked, this, &SimplePlayer::openUrl);

    connect(_player1, &VlcMediaPlayer::end, this, &SimplePlayer::reconnect);
    connect(_player1, &VlcMediaPlayer::error, this, &SimplePlayer::reconnect);
    connect(_player1, &VlcMediaPlayer::playing, this, &SimplePlayer::have_connection);
    //connect(_player1, &VlcMediaPlayer::stateChanged, this, &SimplePlayer::have_connection);

    connect(_player2, &VlcMediaPlayer::end, this, &SimplePlayer::reconnect);
    connect(_player2, &VlcMediaPlayer::error, this, &SimplePlayer::reconnect);
    connect(_player2, &VlcMediaPlayer::playing, this, &SimplePlayer::have_connection);
    //connect(_player2, &VlcMediaPlayer::stateChanged, this, &SimplePlayer::have_connection);

    connect(_player3, &VlcMediaPlayer::end, this, &SimplePlayer::reconnect);
    connect(_player3, &VlcMediaPlayer::error, this, &SimplePlayer::reconnect);
    connect(_player3, &VlcMediaPlayer::playing, this, &SimplePlayer::have_connection);
    //connect(_player3, &VlcMediaPlayer::stateChanged, this, &SimplePlayer::have_connection);

    connect(_player4, &VlcMediaPlayer::end, this, &SimplePlayer::reconnect);
    connect(_player4, &VlcMediaPlayer::error, this, &SimplePlayer::reconnect);
    connect(_player4, &VlcMediaPlayer::playing, this, &SimplePlayer::have_connection);
    //connect(_player4, &VlcMediaPlayer::stateChanged, this, &SimplePlayer::have_connection);

    buttons_layout = new QHBoxLayout;
    buttons_layout->addWidget(open_Local);
    buttons_layout->addWidget(open_Url);

    video_row1_layout = new QHBoxLayout;
    video_row1_layout->addWidget(video1);
    video_row1_layout->addWidget(video2);
    video_row2_layout = new QHBoxLayout;
    video_row2_layout->addWidget(video3);
    video_row2_layout->addWidget(video4);

    main_layout = new QVBoxLayout;
    main_layout->addLayout(buttons_layout);
    main_layout->addLayout(video_row1_layout);
    main_layout->addLayout(video_row2_layout);

    this->setLayout(main_layout);

}

SimplePlayer::~SimplePlayer()
{
    delete _player1;
    delete _player2;
    delete _player3;
    delete _player4;

    delete _media1;
    delete _media2;
    delete _media3;
    delete _media4;

    delete _instance1;
    delete _instance2;
    delete _instance3;
    delete _instance4;
}

void SimplePlayer::openLocal()
{
    url1.clear();
    url2.clear();
    url3.clear();
    url4.clear();

    url1 = tr("rtsp://192.168.3.154:8554/");
    if (url1.isEmpty())
        return;
    _media1 = new VlcMedia(url1, _instance1);
    _player1->open(_media1);

    url2 = tr("rtsp://192.168.3.154:8558/");
    if (url2.isEmpty())
        return;
    _media2 = new VlcMedia(url2, _instance2);
    _player2->open(_media2);

    url3 = tr("rtsp://192.168.3.154:8562/");
    if (url3.isEmpty())
        return;
    _media3 = new VlcMedia(url3, _instance3);
    _player3->open(_media3);

    url4 = tr("rtsp://192.168.3.154:8566/");
    if (url4.isEmpty())
        return;
    _media4 = new VlcMedia(url4, _instance4);
    _player4->open(_media4);

    label1->raise();
    label2->raise();
    label3->raise();
    label4->raise();
}

void SimplePlayer::openUrl()
{
    url1.clear();
    url2.clear();
    url3.clear();
    url4.clear();

    url1 = tr("rtsp://192.168.3.99:8554/");
    if (url1.isEmpty())
        return;
    _media1 = new VlcMedia(url1, _instance1);
    _player1->open(_media1);

    url2 = tr("rtsp://192.168.3.99:8558/");
    if (url2.isEmpty())
        return;
    _media2 = new VlcMedia(url2, _instance2);
    _player2->open(_media2);

    url3 = tr("rtsp://192.168.3.99:8562/");
    if (url3.isEmpty())
        return;
    _media3 = new VlcMedia(url3, _instance3);
    _player3->open(_media3);

    url4 = tr("rtsp://192.168.3.99:8566/");
    if (url4.isEmpty())
        return;
    _media4 = new VlcMedia(url4, _instance4);
    _player4->open(_media4);

    label1->raise();
    label2->raise();
    label3->raise();
    label4->raise();
}

void SimplePlayer::reconnect()
{
    int x, y;
    VlcMediaPlayer* player = qobject_cast<VlcMediaPlayer*>(sender());
    player->open(player->currentMedia());
    if (QString(player->objectName()) == "_player1")
    {
        x = video1->geometry().center().x() - warn_w / 2;
        y = video1->geometry().center().y() - warn_h / 2;
        label1->setGeometry(x, y, warn_w, warn_h);
        label1->show();
    }
    if (QString(player->objectName()) == "_player2")
    {
        x = video2->geometry().center().x() - warn_w / 2;
        y = video2->geometry().center().y() - warn_h / 2;
        label2->setGeometry(x, y, warn_w, warn_h);
        label2->show();
    }
    if (QString(player->objectName()) == "_player3")
    {
        x = video3->geometry().center().x() - warn_w / 2;
        y = video3->geometry().center().y() - warn_h / 2;
        label3->setGeometry(x, y, warn_w, warn_h);
        label3->show();
    }
    if (QString(player->objectName()) == "_player4")
    {
        x = video4->geometry().center().x() - warn_w / 2;
        y = video4->geometry().center().y() - warn_h / 2;
        label4->setGeometry(x, y, warn_w, warn_h);
        label4->show();
    }
}

void SimplePlayer::have_connection()
{
/*
    VlcMediaPlayer* player = qobject_cast<VlcMediaPlayer*>(sender());
    player->open(player->currentMedia());
    //QString temp = player->objectName() ;
    qDebug() << QString(player->objectName());
    qDebug() << player->state();
    */
    /*
    if (QString(player->objectName()) == "_player1"  && player->state() == 3) // playing
        if (label1->isHidden() == false)
            label1->hide();
    if (QString(player->objectName()) == "_player2"  && player->state() == 3) // playing
        if (label2->isHidden() == false)
            label2->hide();
    if (QString(player->objectName()) == "_player3"  && player->state() == 3) // playing
        if (label3->isHidden() == false)
            label3->hide();
    if (QString(player->objectName()) == "_player4"  && player->state() == 3) // playing
        if (label4->isHidden() == false)
            label4->hide();
            */
/*
    label1->hide();
    label2->hide();
    label3->hide();
    label4->hide();
    */
}

void SimplePlayer::resizeEvent(QResizeEvent *event)
{
/*
    label1->setGeometry(video1->geometry().center().x() - warn_w / 2, video1->geometry().center().y() - warn_h / 2, warn_w, warn_h);
    label2->setGeometry(video2->geometry().center().x() - warn_w / 2, video2->geometry().center().y() - warn_h / 2, warn_w, warn_h);
    label3->setGeometry(video3->geometry().center().x() - warn_w / 2, video3->geometry().center().y() - warn_h / 2, warn_w, warn_h);
    label4->setGeometry(video4->geometry().center().x() - warn_w / 2, video4->geometry().center().y() - warn_h / 2, warn_w, warn_h);
    */
}

[DrageFabeldyr]

seems i've found a problem:
each label think that its videoparent topleftcorner is (0, 0)

[kenchan]

can you post the SimplePlayer header please?

[DrageFabeldyr]

#ifndef SIMPLEPLAYER_H_
#define SIMPLEPLAYER_H_

#include <QMainWindow>
#include <VLCQtWidgets/WidgetVideo.h>
#include <QDebug>
#include <QLabel>
#include <QGridLayout>
#include <QPushButton>

class VlcInstance;
class VlcMedia;
class VlcMediaPlayer;

class SimplePlayer : public QWidget
{
    Q_OBJECT
public:
    explicit SimplePlayer(QWidget *parent = 0);
    ~SimplePlayer();
    QHBoxLayout *buttons_layout;
    QHBoxLayout *video_row1_layout;
    QHBoxLayout *video_row2_layout;
    QVBoxLayout *main_layout;

protected:
    void resizeEvent(QResizeEvent *event);

private slots:
    void openLocal();
    void openUrl();
    void reconnect();
    void have_connection();

private:
    VlcInstance *_instance1;
    VlcInstance *_instance2;
    VlcInstance *_instance3;
    VlcInstance *_instance4;

    VlcMedia *_media1;
    VlcMedia *_media2;
    VlcMedia *_media3;
    VlcMedia *_media4;

    VlcMediaPlayer *_player1;
    VlcMediaPlayer *_player2;
    VlcMediaPlayer *_player3;
    VlcMediaPlayer *_player4;

    QPushButton *open_Local;
    QPushButton *open_Url;

    VlcWidgetVideo * video1;
    VlcWidgetVideo * video2 ;
    VlcWidgetVideo * video3 ;
    VlcWidgetVideo * video4 ;

    QLabel *label1;
    QLabel *label2;
    QLabel *label3;
    QLabel *label4;

    QString url1;
    QString url2;
    QString url3;
    QString url4;

    int warn_w = 200; // warning width
    int warn_h = 40; // warning_height
};

#endif // SIMPLEPLAYER_H_

ok, by this changes in code:

    int x = video1->geometry().center().x();// - warn_w / 2;
    int y = video1->geometry().center().y();// - warn_h / 2;

    label1->setGeometry(x, y, warn_w, warn_h);
    label2->setGeometry(x, y, warn_w, warn_h);
    label3->setGeometry(x, y, warn_w, warn_h);
    label4->setGeometry(x, y, warn_w, warn_h);

i can see all 4 warnings over each video and all them at the bottom-right-corner, because x = 319 and y = 239
and of course if i get coordinates from main widget and put it into videowidget when top-left-corner is (0, 0) i wouldn't see it - it's beyond the borders

[kenchan]

Great i will see it a can build something like it. You probably need to map the coordinates

[kenchan]

What version of Qt are you using and what is the platform?

[DrageFabeldyr]

@kenchan win7x64 Qt5.7.1

[kenchan]

OK, your resize event should probably look something like this

label1->setGeometry(video1->rect().adjusted(video1->rect().width()/4,video1->rect().height()/4,-video1->rect().width()/4,-video1->rect().height()/4));
label2->setGeometry(video2->rect().adjusted(video2->rect().width()/4,video2->rect().height()/4,-video2->rect().width()/4,-video2->rect().height()/4));
label3->setGeometry(video3->rect().adjusted(video3->rect().width()/4,video3->rect().height()/4,-video3->rect().width()/4,-video3->rect().height()/4));
label4->setGeometry(video4->rect().adjusted(video4->rect().width()/4,video4->rect().height()/4,-video4->rect().width()/4,-video4->rect().height()/4));

[DrageFabeldyr]

my solution is:

    QRect videoRect = video1->geometry();
    label1->setGeometry(videoRect.width()/2 - warn_w/2, videoRect.height()/2, warn_w, warn_h);

for others just put 2, 3, 4 instead of 1 and it works, but again many thanks

[kenchan]

Good, glad you got it working.