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#include <QDebug>
#include <QPainter>
#include "SnackBar.h"
constexpr int STARTING_OFFSET = 1;
SnackBar::SnackBar(QWidget *parent)
: OverlayWidget(parent)
{
bgOpacity_ = 0.9;
duration_ = 6000;
boxWidth_ = 400;
boxHeight_ = 40;
boxPadding_ = 10;
textColor_ = QColor("white");
bgColor_ = QColor("#333");
offset_ = STARTING_OFFSET;
position_ = SnackBarPosition::Top;
QFont font("Open Sans", 14, QFont::Medium);
setFont(font);
showTimer_ = new QTimer();
hideTimer_ = new QTimer();
hideTimer_->setSingleShot(true);
connect(showTimer_, SIGNAL(timeout()), this, SLOT(onTimeout()));
connect(hideTimer_, SIGNAL(timeout()), this, SLOT(hideMessage()));
}
SnackBar::~SnackBar()
{
stopTimers();
delete showTimer_;
delete hideTimer_;
}
void
SnackBar::start()
{
show();
raise();
showTimer_->start(10);
}
void
SnackBar::hideMessage()
{
stopTimers();
hide();
// Moving on to the next message.
messages_.removeFirst();
// Reseting the starting position of the widget.
offset_ = STARTING_OFFSET;
if (!messages_.isEmpty())
start();
}
void
SnackBar::stopTimers()
{
showTimer_->stop();
hideTimer_->stop();
}
void
SnackBar::showMessage(const QString &msg)
{
messages_.push_back(msg);
// There is already an active message.
if (isVisible())
return;
start();
}
void
SnackBar::onTimeout()
{
offset_ -= 0.5;
if (offset_ <= 0.0) {
showTimer_->stop();
hideTimer_->start(duration_);
}
update();
}
void
SnackBar::mousePressEvent(QMouseEvent *)
{
hideMessage();
}
void
SnackBar::paintEvent(QPaintEvent *event)
{
Q_UNUSED(event)
if (messages_.isEmpty())
return;
auto message_ = messages_.first();
QPainter p(this);
p.setRenderHint(QPainter::Antialiasing);
QBrush brush;
brush.setStyle(Qt::SolidPattern);
brush.setColor(bgColor_);
p.setBrush(brush);
p.setOpacity(bgOpacity_);
QRect r(0, 0, boxWidth_, boxHeight_);
p.setPen(Qt::white);
QRect br = p.boundingRect(r, Qt::AlignHCenter | Qt::AlignTop | Qt::TextWordWrap, message_);
p.setPen(Qt::NoPen);
r = br.united(r).adjusted(-boxPadding_, -boxPadding_, boxPadding_, boxPadding_);
const qreal s = 1 - offset_;
if (position_ == SnackBarPosition::Bottom)
p.translate((width() - (r.width() - 2 * boxPadding_)) / 2,
height() - boxPadding_ - s * (r.height()));
else
p.translate((width() - (r.width() - 2 * boxPadding_)) / 2,
s * (r.height()) - 2 * boxPadding_);
br.moveCenter(r.center());
p.drawRoundedRect(r.adjusted(0, 0, 0, 3), 3, 3);
p.setPen(textColor_);
p.drawText(br, Qt::AlignHCenter | Qt::AlignTop | Qt::TextWordWrap, message_);
}