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authorKonstantinos Sideris <sideris.konstantin@gmail.com>2017-04-06 02:06:42 +0300
committerKonstantinos Sideris <sideris.konstantin@gmail.com>2017-04-06 02:06:42 +0300
commit4f45575c791a73e6711583c680f60954de094666 (patch)
tree8b4b72e2e9a40ed57f9e02cba496a94123c1ea18 /src/SlidingStackWidget.cc
downloadnheko-4f45575c791a73e6711583c680f60954de094666.tar.xz
Initial commit
Diffstat (limited to 'src/SlidingStackWidget.cc')
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diff --git a/src/SlidingStackWidget.cc b/src/SlidingStackWidget.cc
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index 00000000..c4d2f7cf --- /dev/null +++ b/src/SlidingStackWidget.cc
@@ -0,0 +1,151 @@ +/* + * 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 "SlidingStackWidget.h" + +SlidingStackWidget::SlidingStackWidget(QWidget *parent) + : QStackedWidget(parent) +{ + window_ = parent; + + if (parent == Q_NULLPTR) { + qDebug() << "Using nullptr for parent"; + window_ = this; + } + + current_position_ = QPoint(0, 0); + speed_ = 400; + now_ = 0; + next_ = 0; + active_ = false; + animation_type_ = QEasingCurve::InOutCirc; +} + +SlidingStackWidget::~SlidingStackWidget() +{ +} + +void SlidingStackWidget::slideInNext() +{ + int now = currentIndex(); + + if (now < count() - 1) + slideInIndex(now + 1); +} + +void SlidingStackWidget::slideInPrevious() +{ + int now = currentIndex(); + + if (now > 0) + slideInIndex(now - 1); +} + +void SlidingStackWidget::slideInIndex(int index, AnimationDirection direction) +{ + // Take into consideration possible index overflow/undeflow. + if (index > count() - 1) { + direction = AnimationDirection::RIGHT_TO_LEFT; + index = index % count(); + } else if (index < 0) { + direction = AnimationDirection::LEFT_TO_RIGHT; + index = (index + count()) % count(); + } + + slideInWidget(widget(index), direction); +} + +void SlidingStackWidget::slideInWidget(QWidget *next_widget, AnimationDirection direction) +{ + // If an animation is currenlty executing we should wait for it to finish before + // another transition can start. + if (active_) + return; + + active_ = true; + + int now = currentIndex(); + int next = indexOf(next_widget); + + if (now == next) { + active_ = false; + return; + } + + int offset_x = frameRect().width(); + + next_widget->setGeometry(0, 0, offset_x, 0); + + if (direction == AnimationDirection::LEFT_TO_RIGHT) { + offset_x = -offset_x; + } + + QPoint pnext = next_widget->pos(); + QPoint pnow = widget(now)->pos(); + current_position_ = pnow; + + // Reposition the next widget outside of the display area. + next_widget->move(pnext.x() - offset_x, pnext.y()); + + // Make the widget visible. + next_widget->show(); + next_widget->raise(); + + // Animate both the next and now widget. + QPropertyAnimation *animation_now = new QPropertyAnimation(widget(now), "pos"); + + animation_now->setDuration(speed_); + animation_now->setEasingCurve(animation_type_); + animation_now->setStartValue(QPoint(pnow.x(), pnow.y())); + animation_now->setEndValue(QPoint(pnow.x() + offset_x, pnow.y())); + + QPropertyAnimation *animation_next = new QPropertyAnimation(next_widget, "pos"); + + animation_next->setDuration(speed_); + animation_next->setEasingCurve(animation_type_); + animation_next->setStartValue(QPoint(pnext.x() - offset_x, pnext.y())); + animation_next->setEndValue(QPoint(pnext.x(), pnext.y())); + + QParallelAnimationGroup *animation_group = new QParallelAnimationGroup; + + animation_group->addAnimation(animation_now); + animation_group->addAnimation(animation_next); + + connect(animation_group, SIGNAL(finished()), this, SLOT(onAnimationFinished())); + + next_ = next; + now_ = now; + animation_group->start(); +} + +void SlidingStackWidget::onAnimationFinished() +{ + setCurrentIndex(next_); + + // The old widget is no longer necessary so we can hide it and + // move it back to its original position. + widget(now_)->hide(); + widget(now_)->move(current_position_); + + active_ = false; + emit animationFinished(); +} + +int SlidingStackWidget::getWidgetIndex(QWidget *widget) +{ + return indexOf(widget); +}