How to add scroll bar action
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I want to add scroll bar that can be scrolled down and up until the top or bottom of my list widget . I already add the scroll bar but not the action.How can I add action of my scroll bar.I would appreciate any answers.
Here is my code: mainwindow.cppui->listWidget_2->setFlow(QListView::LeftToRight); ui->listWidget_2->setMinimumSize(1000,740); ui->listWidget_2->setGridSize(QSize(1200, 410)); ui->listWidget_2->setResizeMode(QListView::Adjust); ui->listWidget_2->setViewMode(QListView::ListMode); ui->listWidget_2->setWrapping(true); ui->listWidget_image->setFlow(QListView::LeftToRight); // ui->listWidget_image->setMinimumSize(1000,340); ui->listWidget_image->setGridSize(QSize(380, 360)); ui->listWidget_image->setResizeMode(QListView::Adjust); ui->listWidget_image->setViewMode(QListView::ListMode); //ui->listWidget_image->setViewMode(QListWidget::IconMode); //ui->listWidget_image->setIconSize(QSize(400,360)); // ui->listWidget_image->setResizeMode(QListWidget::Adjust); ui->listWidget_image->setWrapping(true); ui->listWidget_read->setFlow(QListView::LeftToRight); //ui->listWidget_read->setMinimumSize(860,380); ui->listWidget_read->setGridSize(QSize(380, 360)); ui->listWidget_read->setResizeMode(QListView::Adjust); ui->listWidget_read->setViewMode(QListView::ListMode); ui->listWidget_read->setWrapping(true); auto item = new QListWidgetItem("", ui->listWidget_2); auto widget = new QWidget; auto vb = new QVBoxLayout; auto hb = new QHBoxLayout; vb->addWidget(ui->pushButton); vb->addWidget(ui->listWidget_image); vb->addWidget(ui->listWidget_read); hb->addLayout(vb); hb->addWidget(ui->verticalScrollBar); widget->setLayout(hb); widget->setMinimumSize(1200,730); ui->listWidget_2->setItemWidget(item,widget); QDir directory = QFileDialog::getExistingDirectory(this, tr("Open Directory"),"/home", QFileDialog::ShowDirsOnly| QFileDialog::DontResolveSymlinks); directory.setNameFilters({"*.log", "*.txt" , "*.sh" , "*.yml"}); for(const QFileInfo & finfo: directory.entryInfoList()){ m_textEdit = new QTextEdit; m_textEdit -> setReadOnly(true); QFile data(finfo.absoluteFilePath()) ; data.open(QIODevice::ReadOnly); QTextStream stream(&data); QString content = stream.readAll(); data.close(); m_textEdit->setText(content); auto item = new QListWidgetItem("", ui->listWidget_read); auto widget = new QWidget; auto label = new QLabel(finfo.fileName()); auto vb = new QVBoxLayout; vb->addWidget(label); vb->addWidget(m_textEdit); widget->setLayout(vb); widget->setMinimumSize(340, 340); ui->listWidget_read->setItemWidget(item, widget); } directory.setNameFilters({"*.mp4" , "*.avi" , "*.flv" , "*.mwv"}); for(const QFileInfo & finfo: directory.entryInfoList()){ QMediaPlayer *mediaPlayer = new QMediaPlayer(); mediaPlayer->setMedia(QUrl::fromLocalFile(finfo.absoluteFilePath())); videoItem = new QGraphicsVideoItem; videoItem->setSize(QSize(320,240)); QGraphicsScene *scene = new QGraphicsScene(this); QGraphicsView *graphicsView = new QGraphicsView(scene); mediaPlayer->setVideoOutput(videoItem); QPushButton *m_playButton = new QPushButton(); m_playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay)); connect(m_playButton, &QAbstractButton::clicked, [mediaPlayer]() { switch (mediaPlayer->state()) { case QMediaPlayer::PlayingState: mediaPlayer->pause(); break; default: mediaPlayer->play(); break; } }); connect(mediaPlayer, &QMediaPlayer::stateChanged, [m_playButton, this](QMediaPlayer::State state) { switch(state) { case QMediaPlayer::PlayingState: m_playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPause)); break; default: m_playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay)); break; } }); QSlider *m_positionSlider = new QSlider(Qt::Horizontal,this); m_positionSlider->setRange(0,mediaPlayer->duration() / 1000); connect(mediaPlayer, &QMediaPlayer::positionChanged ,[m_positionSlider, this](qint64 position){ m_positionSlider->setValue(position); }); connect(mediaPlayer, &QMediaPlayer::durationChanged ,[m_positionSlider, this](qint64 duration){ m_positionSlider->setRange(0,duration); }); connect(m_positionSlider ,&QAbstractSlider::sliderMoved, [mediaPlayer ,this] (int position){ mediaPlayer->setPosition(position); }); auto item = new QListWidgetItem("", ui->listWidget_image); auto widget = new QWidget; auto label = new QLabel(finfo.fileName()); auto vb = new QVBoxLayout; QBoxLayout *controlLayout = new QHBoxLayout; controlLayout->setMargin(0); controlLayout->addWidget(m_playButton); controlLayout->addWidget(m_positionSlider); vb->addWidget(label); vb->addWidget(graphicsView); vb->addLayout(controlLayout); widget->setLayout(vb); widget->setMinimumSize(340, 340); ui->listWidget_image->setItemWidget(item,widget); player.append(mediaPlayer); scene->addItem(videoItem); } -
@jsulm
I just need to scroll down or up to see the items . I can't see all of my items on the display because of the listWidget frame size .That's why I need to scroll down to see other items . I don't know how can I add scrolling action .@Kinesis said in How to add scroll bar action:
I don't know how can I add scrolling action
Like shown here: http://doc.qt.io/qt-5/qscrollarea.html
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@Kinesis said in How to add scroll bar action:
I don't know how can I add scrolling action
Like shown here: http://doc.qt.io/qt-5/qscrollarea.html
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Hi,
QListWidget already has scrollbars so why do you want to put it in a QScrollArea since it already provides that functionality ?
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Hi,
QListWidget already has scrollbars so why do you want to put it in a QScrollArea since it already provides that functionality ?
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The scroll bars appear as soon as the content exceeds the size of the widget itself, unless you force the policy to always on.
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The scroll bars appear as soon as the content exceeds the size of the widget itself, unless you force the policy to always on.
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Did you try to determine why they don't appear ?
