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//
// ScreenMonitor.cs
//
// Author:
// iain <iain@xamarin.com>
//
// Copyright (c) 2016 Xamarin, Inc
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
using System.Collections.Generic;
using AppKit;
using CoreGraphics;
using Foundation;
namespace MonoDevelop.MacIntegration
{
public static class ScreenMonitor
{
// Maps NSScreens to the coordinates they have in GdkScreen space.
//
// [ Monitor1: 1024x800 ] [ Laptop: 2046x1600 ] | [ Monitor2: 1024x800]
//
// In Cocoa the main screen is 0,0 and all other screens are given coordinates relative
// to that screen, so in this example Laptop would be the main screen and the screenspace coordinates are
// relative to it.
// Monitor1: -1024, 0
// Laptop: 0, 0
// Monitor2: 2046, 0
//
// But GdkScreen is different, it creates a giant rectangle encompassing all the screens
// and coordinates in that screenspace are relative to the top left corner
// Monitor1: 0, 0
// Laptop: 1024, 0
// Monitor2: 3070, 0
//
static Dictionary<NSScreen, CGPoint> screenToGdk = null;
static ScreenMonitor ()
{
screenToGdk = UpdateScreenLayout ();
NSNotificationCenter.DefaultCenter.AddObserver (NSApplication.DidChangeScreenParametersNotification, (obj) => {
screenToGdk = UpdateScreenLayout ();
});
}
public static CGPoint GdkPointForNSScreen (NSScreen screen)
{
return screenToGdk [screen];
}
static Dictionary<NSScreen, CGPoint> UpdateScreenLayout ()
{
var screenMap = new Dictionary<NSScreen, CGPoint> ();
var screens = NSScreen.Screens;
if (screens == null) {
return screenMap;
}
nfloat lowestLeft = 0.0f, highestBottom = 0.0f;
foreach (var screen in screens) {
if (screen.Frame.Left < lowestLeft) {
lowestLeft = screen.Frame.Left;
}
if (screen.Frame.Bottom > highestBottom) {
highestBottom = screen.Frame.Bottom;
}
}
// Now we know that the GdkScreen origin is lowestLeft,highestBottom in NSScreen space
screens = NSScreen.Screens;
foreach (var screen in screens) {
var gdkOrigin = new CGPoint (screen.Frame.Left - lowestLeft, highestBottom - screen.Frame.Bottom);
screenMap [screen] = gdkOrigin;
}
return screenMap;
}
}
}
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