geometry.cpp

Go to the documentation of this file.

/**********************************************************************
 * LeechCraft - modular cross-platform feature rich internet client.
 * Copyright (C) 2006-2014  Georg Rudoy
 *
 * Distributed under the Boost Software License, Version 1.0.
 * (See accompanying file LICENSE or copy at https://www.boost.org/LICENSE_1_0.txt)
 **********************************************************************/
 
#include "geometry.h"
#include <QGuiApplication>
#include <QRect>
#include <QScreen>
#include <QSize>
#include <QtDebug>
 
namespace LC::Util
{
    QPoint FitRectScreen (QPoint pos, const QSize& size, FitFlags flags, const QPoint& shiftAdd)
    {
        return FitRect (pos, size, ScreenGeometry (pos), flags, shiftAdd);
    }
 
    QPoint FitRect (QPoint pos, const QSize& size, const QRect& geometry,
            FitFlags flags, const QPoint& shiftAdd)
    {
        int xDiff = std::max (0, pos.x () + size.width () - (geometry.width () + geometry.x ()));
        if (!xDiff)
            xDiff = std::min (0, pos.x () - geometry.x ());
        int yDiff = std::max (0, pos.y () + size.height () - (geometry.height () + geometry.y ()));
        if (!yDiff)
            yDiff = std::min (0, pos.y () - geometry.y ());
 
        if (flags & FitFlag::NoOverlap)
        {
            auto overlapFixer = [] (int& diff, int dim)
            {
                if (diff > 0)
                    diff = dim > diff ? dim : diff;
            };
 
            if (QRect (pos - QPoint (xDiff, yDiff), size).contains (pos) && yDiff < size.height ())
                overlapFixer (yDiff, size.height ());
            if (QRect (pos - QPoint (xDiff, yDiff), size).contains (pos) && xDiff < size.width ())
                overlapFixer (xDiff, size.width ());
        }
 
        if (xDiff)
            pos.rx () -= xDiff + shiftAdd.x ();
        if (yDiff)
            pos.ry () -= yDiff + shiftAdd.y ();
 
        return pos;
    }
 
    QScreen* GetScreenWithFallback (const QPoint& p)
    {
        if (auto screen = QGuiApplication::screenAt (p))
            return screen;
 
        qWarning () << Q_FUNC_INFO
                << "unknown screen for point"
                << p;
        return QGuiApplication::primaryScreen ();
    }
 
    QRect AvailableGeometry (const QPoint& p)
    {
        return GetScreenWithFallback (p)->availableGeometry ();
    }
 
    QRect ScreenGeometry (const QPoint& p)
    {
        return GetScreenWithFallback (p)->geometry ();
    }
}