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#include <QDebug>
#include <QPainter>
#include <tweeny.h>
#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");
font.setPixelSize(14);
font.setWeight(50);
setFont(font);
hideTimer_.setSingleShot(true);
auto offset_anim = tweeny::from(1.0f).to(0.0f).during(100).via(tweeny::easing::cubicOut);
connect(&showTimer_, &QTimer::timeout, this, [this, offset_anim]() mutable {
if (offset_anim.progress() < 1.0f) {
offset_ = offset_anim.step(0.07f);
update();
} else {
showTimer_.stop();
hideTimer_.start(duration_);
offset_anim.seek(0.0f);
}
});
connect(&hideTimer_, SIGNAL(timeout()), this, SLOT(hideMessage()));
hide();
}
void
SnackBar::start()
{
if (messages_.empty())
return;
show();
raise();
showTimer_.start(10);
}
void
SnackBar::hideMessage()
{
stopTimers();
hide();
if (!messages_.empty())
// Moving on to the next message.
messages_.pop_front();
// Reseting the starting position of the widget.
offset_ = STARTING_OFFSET;
if (!messages_.empty())
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::mousePressEvent(QMouseEvent *)
{
hideMessage();
}
void
SnackBar::paintEvent(QPaintEvent *event)
{
Q_UNUSED(event)
if (messages_.empty())
return;
auto message_ = messages_.front();
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_);
}
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