volumebutton.cpp Example File

musicplayer/volumebutton.cpp
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#include "volumebutton.h" #include <QtWidgets> #include <QtWinExtras> VolumeButton::VolumeButton(QWidget *parent) : QToolButton(parent) { setIcon(style()->standardIcon(QStyle::SP_MediaVolume)); setPopupMode(QToolButton::InstantPopup); QWidget *popup = new QWidget(this); slider = new QSlider(Qt::Horizontal, popup); slider->setRange(0, 100); connect(slider, &QAbstractSlider::valueChanged, this, &VolumeButton::volumeChanged); label = new QLabel(popup); label->setAlignment(Qt::AlignCenter); label->setNum(100); label->setMinimumWidth(label->sizeHint().width()); typedef void(QLabel::*IntSlot)(int); connect(slider, &QAbstractSlider::valueChanged, label, static_cast<IntSlot>(&QLabel::setNum)); QBoxLayout *popupLayout = new QHBoxLayout(popup); popupLayout->setMargin(2); popupLayout->addWidget(slider); popupLayout->addWidget(label); QWidgetAction *action = new QWidgetAction(this); action->setDefaultWidget(popup); menu = new QMenu(this); menu->addAction(action); setMenu(menu); stylize(); } void VolumeButton::increaseVolume() { slider->triggerAction(QSlider::SliderPageStepAdd); } void VolumeButton::descreaseVolume() { slider->triggerAction(QSlider::SliderPageStepSub); } int VolumeButton::volume() const { return slider->value(); } void VolumeButton::setVolume(int volume) { slider->setValue(volume); } void VolumeButton::stylize() { if (QtWin::isCompositionEnabled()) { QtWin::enableBlurBehindWindow(menu); QString css("QMenu { border: 1px solid %1; border-radius: 2px; background: transparent; }"); menu->setStyleSheet(css.arg(QtWin::realColorizationColor().name())); } else { QtWin::disableBlurBehindWindow(menu); QString css("QMenu { border: 1px solid black; background: %1; }"); menu->setStyleSheet(css.arg(QtWin::realColorizationColor().name())); } }