diff --git a/src/ui/ScrollBar.cc b/src/ui/ScrollBar.cc
new file mode 100644
index 00000000..300b9a04
--- /dev/null
+++ b/src/ui/ScrollBar.cc
@@ -0,0 +1,106 @@
+/*
+ * nheko Copyright (C) 2017 Konstantinos Sideris <siderisk@auth.gr>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <QDebug>
+#include <QGraphicsOpacityEffect>
+#include <QPropertyAnimation>
+
+#include "ScrollBar.h"
+
+ScrollBar::ScrollBar(QScrollArea *area, QWidget *parent)
+ : QScrollBar(parent)
+ , area_{area}
+{
+ hideTimer_.setSingleShot(true);
+
+ connect(&hideTimer_, &QTimer::timeout, this, &ScrollBar::fadeOut);
+
+ eff = new QGraphicsOpacityEffect(this);
+ setGraphicsEffect(eff);
+}
+
+void ScrollBar::fadeOut()
+{
+ isActive = false;
+
+ QPropertyAnimation *anim = new QPropertyAnimation(eff, "opacity");
+ anim->setDuration(AnimationDuration);
+ anim->setStartValue(1);
+ anim->setEndValue(0);
+ anim->setEasingCurve(QEasingCurve::Linear);
+ anim->start(QPropertyAnimation::DeleteWhenStopped);
+}
+
+void ScrollBar::fadeIn()
+{
+ QPropertyAnimation *anim = new QPropertyAnimation(eff, "opacity");
+ anim->setDuration(AnimationDuration);
+ anim->setStartValue(0);
+ anim->setEndValue(1);
+ anim->setEasingCurve(QEasingCurve::Linear);
+ anim->start(QPropertyAnimation::DeleteWhenStopped);
+}
+
+void ScrollBar::sliderChange(SliderChange change)
+{
+ if (!isActive)
+ fadeIn();
+
+ hideTimer_.stop();
+ hideTimer_.start(1500);
+ isActive = true;
+
+ QScrollBar::sliderChange(change);
+}
+
+void ScrollBar::paintEvent(QPaintEvent *)
+{
+ if (!width() && !height()) {
+ hide();
+ return;
+ }
+
+ QPainter p(this);
+ p.setRenderHint(QPainter::TextAntialiasing);
+ p.setRenderHint(QPainter::Antialiasing);
+ p.setRenderHint(QPainter::SmoothPixmapTransform);
+
+ p.setPen(Qt::NoPen);
+
+ QColor bg(33, 33, 33, 30);
+ QColor handle(0, 0, 0, 80);
+
+ p.setBrush(bg);
+ QRect backgroundArea(Padding, 0, handleWidth_, height());
+ p.drawRoundedRect(backgroundArea, roundRadius_, roundRadius_);
+
+ int areaHeight = area_->height();
+ int widgetHeight = area_->widget()->height();
+
+ double visiblePercentage = (double)areaHeight / (double)widgetHeight;
+ int handleHeight = std::max(visiblePercentage * areaHeight, (double)minHandleHeight_);
+
+ if (maximum() == 0) {
+ return;
+ }
+
+ int handle_y = (value() * (areaHeight - handleHeight - roundRadius_ / 2)) / maximum();
+
+ p.setBrush(handle);
+ QRect handleArea(Padding, handle_y, handleWidth_, handleHeight);
+ p.drawRoundedRect(handleArea, roundRadius_, roundRadius_);
+}
|
