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/*
widgetremoteview.cpp
This file is part of GammaRay, the Qt application inspection and manipulation tool.
SPDX-FileCopyrightText: 2017 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.com>
Author: Volker Krause <volker.krause@kdab.com>
SPDX-License-Identifier: GPL-2.0-or-later
Contact KDAB at <info@kdab.com> for commercial licensing options.
*/
#include "widgetremoteview.h"
#include "widgetinspectorinterface.h"
#include <QPainter>
#include <QVector2D>
using namespace GammaRay;
WidgetRemoteView::WidgetRemoteView(QWidget *parent)
: RemoteViewWidget(parent)
, m_tabFocusEnabled(false)
{
}
WidgetRemoteView::~WidgetRemoteView() = default;
void WidgetRemoteView::setTabFocusOverlayEnabled(bool enabled)
{
m_tabFocusEnabled = enabled;
update();
}
static void drawArrow(QPainter *p, QPointF first, QPointF second)
{
p->drawLine(first, second);
QPointF vector(second - first);
QTransform m;
m.rotate(30);
QVector2D v1 = QVector2D(m.map(vector)).normalized() * 10;
m.rotate(-60);
QVector2D v2 = QVector2D(m.map(vector)).normalized() * 10;
p->drawLine(second, second - v1.toPointF());
p->drawLine(second, second - v2.toPointF());
}
void WidgetRemoteView::drawDecoration(QPainter *p)
{
if (!m_tabFocusEnabled)
return;
const auto data = frame().data.value<WidgetFrameData>();
if (data.tabFocusRects.size() < 2)
return;
p->save();
p->setPen(Qt::darkGreen);
for (const auto &rect : data.tabFocusRects)
p->drawRect(mapFromSource(rect));
QVector<QLineF> lines;
lines.reserve(data.tabFocusRects.size());
for (int i = 0; i < data.tabFocusRects.size() - 1; ++i) {
const auto r1 = mapFromSource(data.tabFocusRects.at(i));
const auto r2 = mapFromSource(data.tabFocusRects.at(i + 1));
p->setPen(Qt::green);
QLineF l(r1.center(), r2.center());
for (const auto &prevLine : std::as_const(lines)) {
QPointF pnt;
if (l.intersects(prevLine, &pnt) == QLineF::BoundedIntersection && pnt != l.p1() && pnt != l.p2()) {
p->setPen(Qt::red);
break;
}
}
lines.push_back(l);
drawArrow(p, r1.center(), r2.center());
}
p->restore();
}
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