* Copyright 2014 Weng Xuetian <wengxt@gmail.com>
*
* 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 2 of
* the License or (at your option) version 3 or any later version
* accepted by the membership of KDE e.V. (or its successor approved
* by the membership of KDE e.V.), which shall act as a proxy
* defined in Section 14 of version 3 of the license.
*
* 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 <limits.h>
#include <QGuiApplication>
#include <QScreen>
#include "screen.h"
int pointToRect(int x, int y, const QRect& r)
{
int dx = 0;
int dy = 0;
if (x < r.left()) {
dx = r.left() -x;
} else if (x > r.right()) {
dx = x - r.right();
}
if (y < r.top()) {
dy = r.top() - y;
} else if (y > r.bottom()) {
dy = y - r.bottom();
}
return dx + dy;
}
Screen::Screen(QObject* parent) : QObject(parent)
{
}
Screen::~Screen()
{
}
QScreen *screenForPoint(int x, int y) {
auto screens = qApp->screens();
QScreen* closestScreen = nullptr;
int shortestDistance = INT_MAX;
foreach(QScreen* screen, screens) {
auto rect = screen->availableGeometry();
rect.setSize(rect.size() * screen->devicePixelRatio());
int thisDistance = pointToRect(x, y, rect);
if (thisDistance < shortestDistance) {
shortestDistance = thisDistance;
closestScreen = screen;
}
}
if (!closestScreen) {
closestScreen = qApp->primaryScreen();
}
return closestScreen;
}
QRect Screen::geometryForPoint(int x, int y)
{
auto closestScreen = screenForPoint(x, y);
if (closestScreen) {
auto rect = closestScreen->availableGeometry();
rect.setSize(rect.size() * closestScreen->devicePixelRatio());
return rect;
}
return QRect();
}
qreal Screen::devicePixelRatioForPoint(int x, int y)
{
auto closestScreen = screenForPoint(x, y);
if (closestScreen) {
return closestScreen->devicePixelRatio();
}
return 1.0;
}
