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#include "progressview.h"

#include <QEvent>
#include <QVBoxLayout>

using namespace Core;
using namespace Core::Internal;

ProgressView::ProgressView(QWidget *parent)
    : QWidget(parent), m_referenceWidget(0), m_hovered(false)
{
    m_layout = new QVBoxLayout;
    setLayout(m_layout);
    m_layout->setContentsMargins(0, 0, 0, 1);
    m_layout->setSpacing(0);
    m_layout->setSizeConstraint(QLayout::SetFixedSize);
    setWindowTitle(tr("Processes"));
}

ProgressView::~ProgressView()
{
}

void ProgressView::addProgressWidget(QWidget *widget)
{
    m_layout->insertWidget(0, widget);
}

void ProgressView::removeProgressWidget(QWidget *widget)
{
    m_layout->removeWidget(widget);
}

bool ProgressView::isHovered() const
{
    return m_hovered;
}

void ProgressView::setReferenceWidget(QWidget *widget)
{
    if (m_referenceWidget)
        removeEventFilter(this);
    m_referenceWidget = widget;
    if (m_referenceWidget)
        installEventFilter(this);
    reposition();
}

bool ProgressView::event(QEvent *event)
{
    if (event->type() == QEvent::ParentAboutToChange && parentWidget()) {
        parentWidget()->removeEventFilter(this);
    } else if (event->type() == QEvent::ParentChange && parentWidget()) {
        parentWidget()->installEventFilter(this);
    } else if (event->type() == QEvent::Resize) {
        reposition();
    } else if (event->type() == QEvent::Enter) {
        m_hovered = true;
        emit hoveredChanged(m_hovered);
    } else if (event->type() == QEvent::Leave) {
        m_hovered = false;
        emit hoveredChanged(m_hovered);
    }
    return QWidget::event(event);
}

bool ProgressView::eventFilter(QObject *obj, QEvent *event)
{
    if ((obj == parentWidget() || obj == m_referenceWidget) && event->type() == QEvent::Resize)
        reposition();
    return false;
}

void ProgressView::reposition()
{
    if (!parentWidget() || !m_referenceWidget)
        return;
    QPoint topRightReferenceInParent =
            m_referenceWidget->mapTo(parentWidget(), m_referenceWidget->rect().topRight());
    move(topRightReferenceInParent - rect().bottomRight());
}