Initial commit

.gitignore

@@ -0,0 +1,350 @@
+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+##
+## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore
+
+# User-specific files
+*.rsuser
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# User-specific files (MonoDevelop/Xamarin Studio)
+*.userprefs
+
+# Mono auto generated files
+mono_crash.*
+
+# Build results
+[Dd]ebug/
+[Dd]ebugPublic/
+[Rr]elease/
+[Rr]eleases/
+x64/
+x86/
+[Aa][Rr][Mm]/
+[Aa][Rr][Mm]64/
+bld/
+[Bb]in/
+[Oo]bj/
+[Ll]og/
+[Ll]ogs/
+
+# Visual Studio 2015/2017 cache/options directory
+.vs/
+# Uncomment if you have tasks that create the project's static files in wwwroot
+#wwwroot/
+
+# Visual Studio 2017 auto generated files
+Generated\ Files/
+
+# MSTest test Results
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+
+# NUnit
+*.VisualState.xml
+TestResult.xml
+nunit-*.xml
+
+# Build Results of an ATL Project
+[Dd]ebugPS/
+[Rr]eleasePS/
+dlldata.c
+
+# Benchmark Results
+BenchmarkDotNet.Artifacts/
+
+# .NET Core
+project.lock.json
+project.fragment.lock.json
+artifacts/
+
+# StyleCop
+StyleCopReport.xml
+
+# Files built by Visual Studio
+*_i.c
+*_p.c
+*_h.h
+*.ilk
+*.meta
+*.obj
+*.iobj
+*.pch
+*.pdb
+*.ipdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*_wpftmp.csproj
+*.log
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.svclog
+*.scc
+
+# Chutzpah Test files
+_Chutzpah*
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opendb
+*.opensdf
+*.sdf
+*.cachefile
+*.VC.db
+*.VC.VC.opendb
+
+# Visual Studio profiler
+*.psess
+*.vsp
+*.vspx
+*.sap
+
+# Visual Studio Trace Files
+*.e2e
+
+# TFS 2012 Local Workspace
+$tf/
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+*.DotSettings.user
+
+# TeamCity is a build add-in
+_TeamCity*
+
+# DotCover is a Code Coverage Tool
+*.dotCover
+
+# AxoCover is a Code Coverage Tool
+.axoCover/*
+!.axoCover/settings.json
+
+# Visual Studio code coverage results
+*.coverage
+*.coveragexml
+
+# NCrunch
+_NCrunch_*
+.*crunch*.local.xml
+nCrunchTemp_*
+
+# MightyMoose
+*.mm.*
+AutoTest.Net/
+
+# Web workbench (sass)
+.sass-cache/
+
+# Installshield output folder
+[Ee]xpress/
+
+# DocProject is a documentation generator add-in
+DocProject/buildhelp/
+DocProject/Help/*.HxT
+DocProject/Help/*.HxC
+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
+DocProject/Help/*.hhp
+DocProject/Help/Html2
+DocProject/Help/html
+
+# Click-Once directory
+publish/
+
+# Publish Web Output
+*.[Pp]ublish.xml
+*.azurePubxml
+# Note: Comment the next line if you want to checkin your web deploy settings,
+# but database connection strings (with potential passwords) will be unencrypted
+*.pubxml
+*.publishproj
+
+# Microsoft Azure Web App publish settings. Comment the next line if you want to
+# checkin your Azure Web App publish settings, but sensitive information contained
+# in these scripts will be unencrypted
+PublishScripts/
+
+# NuGet Packages
+*.nupkg
+# NuGet Symbol Packages
+*.snupkg
+# The packages folder can be ignored because of Package Restore
+**/[Pp]ackages/*
+# except build/, which is used as an MSBuild target.
+!**/[Pp]ackages/build/
+# Uncomment if necessary however generally it will be regenerated when needed
+#!**/[Pp]ackages/repositories.config
+# NuGet v3's project.json files produces more ignorable files
+*.nuget.props
+*.nuget.targets
+
+# Microsoft Azure Build Output
+csx/
+*.build.csdef
+
+# Microsoft Azure Emulator
+ecf/
+rcf/
+
+# Windows Store app package directories and files
+AppPackages/
+BundleArtifacts/
+Package.StoreAssociation.xml
+_pkginfo.txt
+*.appx
+*.appxbundle
+*.appxupload
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!?*.[Cc]ache/
+
+# Others
+ClientBin/
+~$*
+*~
+*.dbmdl
+*.dbproj.schemaview
+*.jfm
+*.pfx
+*.publishsettings
+orleans.codegen.cs
+
+# Including strong name files can present a security risk
+# (https://github.com/github/gitignore/pull/2483#issue-259490424)
+#*.snk
+
+# Since there are multiple workflows, uncomment next line to ignore bower_components
+# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622)
+#bower_components/
+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file
+# to a newer Visual Studio version. Backup files are not needed,
+# because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+ServiceFabricBackup/
+*.rptproj.bak
+
+# SQL Server files
+*.mdf
+*.ldf
+*.ndf
+
+# Business Intelligence projects
+*.rdl.data
+*.bim.layout
+*.bim_*.settings
+*.rptproj.rsuser
+*- [Bb]ackup.rdl
+*- [Bb]ackup ([0-9]).rdl
+*- [Bb]ackup ([0-9][0-9]).rdl
+
+# Microsoft Fakes
+FakesAssemblies/
+
+# GhostDoc plugin setting file
+*.GhostDoc.xml
+
+# Node.js Tools for Visual Studio
+.ntvs_analysis.dat
+node_modules/
+
+# Visual Studio 6 build log
+*.plg
+
+# Visual Studio 6 workspace options file
+*.opt
+
+# Visual Studio 6 auto-generated workspace file (contains which files were open etc.)
+*.vbw
+
+# Visual Studio LightSwitch build output
+**/*.HTMLClient/GeneratedArtifacts
+**/*.DesktopClient/GeneratedArtifacts
+**/*.DesktopClient/ModelManifest.xml
+**/*.Server/GeneratedArtifacts
+**/*.Server/ModelManifest.xml
+_Pvt_Extensions
+
+# Paket dependency manager
+.paket/paket.exe
+paket-files/
+
+# FAKE - F# Make
+.fake/
+
+# CodeRush personal settings
+.cr/personal
+
+# Python Tools for Visual Studio (PTVS)
+__pycache__/
+*.pyc
+
+# Cake - Uncomment if you are using it
+# tools/**
+# !tools/packages.config
+
+# Tabs Studio
+*.tss
+
+# Telerik's JustMock configuration file
+*.jmconfig
+
+# BizTalk build output
+*.btp.cs
+*.btm.cs
+*.odx.cs
+*.xsd.cs
+
+# OpenCover UI analysis results
+OpenCover/
+
+# Azure Stream Analytics local run output
+ASALocalRun/
+
+# MSBuild Binary and Structured Log
+*.binlog
+
+# NVidia Nsight GPU debugger configuration file
+*.nvuser
+
+# MFractors (Xamarin productivity tool) working folder
+.mfractor/
+
+# Local History for Visual Studio
+.localhistory/
+
+# BeatPulse healthcheck temp database
+healthchecksdb
+
+# Backup folder for Package Reference Convert tool in Visual Studio 2017
+MigrationBackup/
+
+# Ionide (cross platform F# VS Code tools) working folder
+.ionide/

AssemblyInfo.cs

@@ -0,0 +1,10 @@
+using System.Windows;
+
+[assembly: ThemeInfo(
+    ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
+                                     //(used if a resource is not found in the page,
+                                     // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
+                                              //(used if a resource is not found in the page,
+                                              // app, or any theme specific resource dictionaries)
+)]

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2023 Chris Kaczor
+
+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.

PInvoke.cs

@@ -0,0 +1,182 @@
+using System;
+using System.Runtime.InteropServices;
+using JetBrains.Annotations;
+
+namespace ChrisKaczor.Wpf.Windows;
+
+internal partial class PInvoke
+{
+    [StructLayout(LayoutKind.Sequential)]
+    public struct Point
+    {
+        public int X;
+        public int Y;
+
+        public Point(int x, int y)
+        {
+            X = x;
+            Y = y;
+        }
+
+        public Point(System.Drawing.Point pt) : this(pt.X, pt.Y) { }
+
+        public static implicit operator System.Drawing.Point(Point p)
+        {
+            return new System.Drawing.Point(p.X, p.Y);
+        }
+
+        public static implicit operator Point(System.Drawing.Point p)
+        {
+            return new Point(p.X, p.Y);
+        }
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    public struct Rect
+    {
+        public int Left, Top, Right, Bottom;
+
+        public Rect(int left, int top, int right, int bottom)
+        {
+            Left = left;
+            Top = top;
+            Right = right;
+            Bottom = bottom;
+        }
+
+        public Rect(System.Drawing.Rectangle r) : this(r.Left, r.Top, r.Right, r.Bottom) { }
+
+        public int X
+        {
+            get => Left;
+            set { Right -= (Left - value); Left = value; }
+        }
+
+        public int Y
+        {
+            get => Top;
+            set { Bottom -= (Top - value); Top = value; }
+        }
+
+        public int Height
+        {
+            get => Bottom - Top;
+            set => Bottom = value + Top;
+        }
+
+        public int Width
+        {
+            get => Right - Left;
+            set => Right = value + Left;
+        }
+
+        public static implicit operator System.Drawing.Rectangle(Rect r)
+        {
+            return new System.Drawing.Rectangle(r.Left, r.Top, r.Width, r.Height);
+        }
+
+        public static implicit operator Rect(System.Drawing.Rectangle r)
+        {
+            return new Rect(r);
+        }
+
+        public static bool operator ==(Rect r1, Rect r2)
+        {
+            return r1.Equals(r2);
+        }
+
+        public static bool operator !=(Rect r1, Rect r2)
+        {
+            return !r1.Equals(r2);
+        }
+
+        public bool Equals(Rect r)
+        {
+            return r.Left == Left && r.Top == Top && r.Right == Right && r.Bottom == Bottom;
+        }
+
+        public override bool Equals(object? obj)
+        {
+            return obj switch
+            {
+                Rect rect => Equals(rect),
+                System.Drawing.Rectangle rectangle => Equals(new Rect(rectangle)),
+                _ => false
+            };
+        }
+
+        public override int GetHashCode()
+        {
+            return ((System.Drawing.Rectangle) this).GetHashCode();
+        }
+
+        public override string ToString()
+        {
+            return string.Format(System.Globalization.CultureInfo.CurrentCulture, "{{Left={0},Top={1},Right={2},Bottom={3}}}", Left, Top, Right, Bottom);
+        }
+    }
+
+    public struct WindowPlacement
+    {
+        [UsedImplicitly]
+        public int Length;
+
+        [UsedImplicitly]
+        public int Flags;
+
+        [UsedImplicitly]
+        public uint ShowCommand;
+
+        [UsedImplicitly]
+        public Point MinPosition;
+
+        [UsedImplicitly]
+        public Point MaxPosition;
+
+        [UsedImplicitly]
+        public Rect NormalPosition;
+    }
+
+    [Flags]
+    public enum WindowPositionFlags
+    {
+        NoMove = 0x0002
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    public struct WindowPosition
+    {
+        public nint Handle;
+        public nint HandleInsertAfter;
+        public int Left;
+        public int Top;
+        public int Width;
+        public int Height;
+        public WindowPositionFlags Flags;
+
+        public int Right => Left + Width;
+        public int Bottom => Top + Height;
+
+        public bool IsSameLocationAndSize(WindowPosition compare)
+        {
+            return compare.Left == Left && compare.Top == Top && compare.Width == Width && compare.Height == Height;
+        }
+
+        public bool IsSameSize(WindowPosition compare)
+        {
+            return compare.Width == Width && compare.Height == Height;
+        }
+    }
+
+    public enum WindowMessage
+    {
+        WindowPositionChanging = 0x0046,
+        EnterSizeMove = 0x0231,
+        ExitSizeMove = 0x0232
+    }
+
+
+    [LibraryImport("user32.dll")]
+    [return: MarshalAs(UnmanagedType.Bool)]
+    public static partial bool GetWindowPlacement(nint hWnd, ref WindowPlacement lpWindowPlacement);
+}

README.md

@@ -0,0 +1,15 @@
+# ChrisKaczor.Wpf.Windows.SnappingWindow
+
+Extends the base WPF window to allow snapping to screen edges and/or other specified windows.
+
+## Authors
+
+* **Chris Kaczor** - *Initial work* - https://github.com/ckaczor - https://chriskaczor.com
+
+## License
+
+This project is licensed under the MIT License - see the [LICENSE.md](LICENSE.md) file for details.
+
+## Disclaimer
+
+This code is used by my various personal projects and may not be useful or work in all use cases.

SnappingWindow.cs

@@ -0,0 +1,450 @@
+using System;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+using System.Windows;
+using System.Windows.Interop;
+using JetBrains.Annotations;
+using WpfScreenHelper;
+using Rectangle = System.Drawing.Rectangle;
+
+namespace ChrisKaczor.Wpf.Windows
+{
+    [PublicAPI]
+    public class SnappingWindow : Window
+    {
+        #region Member variables
+
+        private HwndSource? _hWndSource;
+        private bool _inSizeMove;
+        private PInvoke.WindowPosition _lastWindowPosition;
+        private List<WindowInformation>? _otherWindows;
+
+        #endregion
+
+        private class WindowBorderRectangles
+        {
+            public WindowBorderRectangles(Rectangle windowPosition, int width, bool inside)
+            {
+                var offset = inside ? width : 0;
+                var actualWidth = inside ? width * 2 : width;
+
+                Top = new Rectangle(windowPosition.Left, windowPosition.Top - offset, windowPosition.Width, actualWidth);
+                Bottom = new Rectangle(windowPosition.Left, windowPosition.Bottom - offset, windowPosition.Width, actualWidth);
+                Left = new Rectangle(windowPosition.Left - offset, windowPosition.Top, actualWidth, windowPosition.Height);
+                Right = new Rectangle(windowPosition.Right - offset, windowPosition.Top, actualWidth, windowPosition.Height);
+            }
+
+            public WindowBorderRectangles(PInvoke.WindowPosition windowPosition, int width, bool inside)
+            {
+                var offset = inside ? width : 0;
+                var actualWidth = inside ? width * 2 : width;
+
+                Top = new Rectangle(windowPosition.Left, windowPosition.Top - offset, windowPosition.Width, actualWidth);
+                Bottom = new Rectangle(windowPosition.Left, windowPosition.Bottom - offset, windowPosition.Width, actualWidth);
+                Left = new Rectangle(windowPosition.Left - offset, windowPosition.Top, actualWidth, windowPosition.Height);
+                Right = new Rectangle(windowPosition.Right - offset, windowPosition.Top, actualWidth, windowPosition.Height);
+            }
+
+            public Rectangle Top { get; }
+            public Rectangle Bottom { get; }
+            public Rectangle Left { get; }
+            public Rectangle Right { get; }
+        }
+
+        private class ResizeSide
+        {
+            public ResizeSide(PInvoke.WindowPosition position1, PInvoke.WindowPosition position2)
+            {
+                if (position1.IsSameSize(position2))
+                    return;
+
+                IsTop = position1.Top != position2.Top;
+                IsBottom = position1.Bottom != position2.Bottom;
+                IsLeft = position1.Left != position2.Left;
+                IsRight = position1.Right != position2.Right;
+            }
+
+            public bool IsTop { get; }
+            public bool IsBottom { get; }
+            public bool IsLeft { get; }
+            public bool IsRight { get; }
+        }
+
+        #region Enumerations
+
+        private enum SnapMode
+        {
+            Move,
+            Resize
+        }
+
+        #endregion
+
+        #region Properties
+
+        protected virtual int SnapDistance => 20;
+
+        protected virtual List<WindowInformation>? OtherWindows => null;
+
+        #endregion
+
+        #region Window overrides
+
+        protected override void OnSourceInitialized(EventArgs e)
+        {
+            base.OnSourceInitialized(e);
+
+            // Store the window handle
+            _hWndSource = PresentationSource.FromVisual(this) as HwndSource;
+
+            // Add a hook
+            _hWndSource?.AddHook(WndProc);
+        }
+
+        protected override void OnClosed(EventArgs e)
+        {
+            base.OnClosed(e);
+
+            // Unhook the window procedure
+            _hWndSource?.RemoveHook(WndProc);
+            _hWndSource?.Dispose();
+        }
+
+        #endregion
+
+        #region Window procedure
+
+        protected virtual nint WndProc(nint hWnd, int msg, nint wParam, nint lParam, ref bool handled)
+        {
+            switch (msg)
+            {
+                case (int) PInvoke.WindowMessage.WindowPositionChanging:
+                    return OnWindowPositionChanging(lParam, ref handled);
+
+                case (int) PInvoke.WindowMessage.EnterSizeMove:
+
+                    // Initialize the last window position
+                    _lastWindowPosition = new PInvoke.WindowPosition
+                    {
+                        Left = (int) Left,
+                        Width = (int) Width,
+                        Height = (int) Height,
+                        Top = (int) Top
+                    };
+
+                    // Store the current other windows
+                    _otherWindows = OtherWindows;
+
+                    _inSizeMove = true;
+
+                    break;
+
+                case (int) PInvoke.WindowMessage.ExitSizeMove:
+                    _inSizeMove = false;
+
+                    break;
+            }
+
+            return nint.Zero;
+        }
+
+        #endregion
+
+        #region Snapping
+
+        private nint OnWindowPositionChanging(nint lParam, ref bool handled)
+        {
+            if (!_inSizeMove)
+                return nint.Zero;
+
+            var snapDistance = SnapDistance;
+
+            // Initialize whether we've updated the position
+            var updated = false;
+
+            // Convert the lParam into the current structure
+            var windowPosition = (PInvoke.WindowPosition) Marshal.PtrToStructure(lParam, typeof(PInvoke.WindowPosition))!;
+
+            // If the window flags indicate no movement then do nothing
+            if ((windowPosition.Flags & PInvoke.WindowPositionFlags.NoMove) != 0)
+                return nint.Zero;
+
+            // If nothing changed then do nothing
+            if (_lastWindowPosition.IsSameLocationAndSize(windowPosition))
+                return nint.Zero;
+
+            // Figure out if the window is being moved or resized
+            var snapMode = _lastWindowPosition.IsSameSize(windowPosition) ? SnapMode.Move : SnapMode.Resize;
+
+            // Figure out what side is resizing
+            var resizeSide = new ResizeSide(windowPosition, _lastWindowPosition);
+
+            // Get the screen the cursor is currently on
+            var screen = Screen.FromPoint(MouseHelper.MousePosition);
+
+            // Create a rectangle based on the current working area of the screen
+            var snapToBorder = screen.WorkingArea;
+
+            // Deflate the rectangle based on the snap distance
+            snapToBorder.Inflate(-snapDistance, -snapDistance);
+
+            if (snapMode == SnapMode.Resize)
+            {
+                // See if we need to snap on the left
+                if (windowPosition.Left < snapToBorder.Left)
+                {
+                    windowPosition.Width += windowPosition.Left - (int) screen.WorkingArea.Left;
+                    windowPosition.Left = (int) screen.WorkingArea.Left;
+
+                    updated = true;
+                }
+
+                // See if we need to snap on the right
+                if (windowPosition.Right > snapToBorder.Right)
+                {
+                    windowPosition.Width += (int) screen.WorkingArea.Right - windowPosition.Right;
+
+                    updated = true;
+                }
+
+                // See if we need to snap to the top
+                if (windowPosition.Top < snapToBorder.Top)
+                {
+                    windowPosition.Height += windowPosition.Top - (int) screen.WorkingArea.Top;
+                    windowPosition.Top = (int) screen.WorkingArea.Top;
+
+                    updated = true;
+                }
+
+                // See if we need to snap to the bottom
+                if (windowPosition.Bottom > snapToBorder.Bottom)
+                {
+                    windowPosition.Height += (int) screen.WorkingArea.Bottom - windowPosition.Bottom;
+
+                    updated = true;
+                }
+            }
+            else
+            {
+                // See if we need to snap on the left
+                if (windowPosition.Left < snapToBorder.Left)
+                {
+                    windowPosition.Left = (int) screen.WorkingArea.Left;
+                    updated = true;
+                }
+
+                // See if we need to snap on the top
+                if (windowPosition.Top < snapToBorder.Top)
+                {
+                    windowPosition.Top = (int) screen.WorkingArea.Top;
+                    updated = true;
+                }
+
+                // See if we need to snap on the right
+                if (windowPosition.Right > snapToBorder.Right)
+                {
+                    windowPosition.Left = (int) screen.WorkingArea.Right - windowPosition.Width;
+                    updated = true;
+                }
+
+                // See if we need to snap on the bottom
+                if (windowPosition.Bottom > snapToBorder.Bottom)
+                {
+                    windowPosition.Top = (int) screen.WorkingArea.Bottom - windowPosition.Height;
+                    updated = true;
+                }
+            }
+
+            var otherWindows = _otherWindows;
+
+            if (otherWindows is { Count: > 0 })
+            {
+                // Get the snap source rectangles for the window being changed
+                var sourceRectangles = new WindowBorderRectangles(windowPosition, 1, false);
+
+                // Loop over all other windows looking to see if we should stick
+                foreach (var otherWindow in otherWindows)
+                {
+                    // Get a rectangle with the bounds of the other window
+                    var otherWindowRect = otherWindow.Location;
+
+                    // Get the snap target rectangles for the current window
+                    var targetRectangles = new WindowBorderRectangles(otherWindow.Location, snapDistance, true);
+
+                    if (snapMode == SnapMode.Move)
+                    {
+                        if (sourceRectangles.Left.IntersectsWith(targetRectangles.Right))
+                        {
+                            windowPosition.Left = otherWindowRect.Right;
+                            updated = true;
+                        }
+
+                        if (sourceRectangles.Right.IntersectsWith(targetRectangles.Left))
+                        {
+                            windowPosition.Left = otherWindowRect.Left - windowPosition.Width;
+                            updated = true;
+                        }
+
+                        if (sourceRectangles.Top.IntersectsWith(targetRectangles.Bottom))
+                        {
+                            windowPosition.Top = otherWindowRect.Bottom;
+                            updated = true;
+                        }
+
+                        if (sourceRectangles.Bottom.IntersectsWith(targetRectangles.Top))
+                        {
+                            windowPosition.Top = otherWindowRect.Top - windowPosition.Height;
+                            updated = true;
+                        }
+
+                        if (windowPosition.Top == otherWindowRect.Bottom || windowPosition.Bottom == otherWindowRect.Top)
+                        {
+                            if (Math.Abs(windowPosition.Left - otherWindowRect.Left) <= snapDistance)
+                            {
+                                windowPosition.Left = otherWindowRect.Left;
+
+                                updated = true;
+                            }
+
+                            if (Math.Abs(windowPosition.Right - otherWindowRect.Right) <= snapDistance)
+                            {
+                                windowPosition.Left = otherWindowRect.Right - windowPosition.Width;
+
+                                updated = true;
+                            }
+                        }
+
+                        if (windowPosition.Left == otherWindowRect.Right || windowPosition.Right == otherWindowRect.Left)
+                        {
+                            if (Math.Abs(otherWindowRect.Bottom - windowPosition.Bottom) <= snapDistance)
+                            {
+                                windowPosition.Top = otherWindowRect.Bottom - windowPosition.Height;
+
+                                updated = true;
+                            }
+
+                            if (Math.Abs(otherWindowRect.Top - windowPosition.Top) <= snapDistance)
+                            {
+                                windowPosition.Top = otherWindowRect.Top;
+
+                                updated = true;
+                            }
+                        }
+                    }
+                    else
+                    {
+                        if (resizeSide.IsLeft)
+                        {
+                            // Check the current window left against the other window right
+                            if (sourceRectangles.Left.IntersectsWith(targetRectangles.Right))
+                            {
+                                var sign = windowPosition.Left < otherWindowRect.Right ? -1 : 1;
+
+                                windowPosition.Width += Math.Abs(otherWindowRect.Right - windowPosition.Left) * sign;
+                                windowPosition.Left = otherWindowRect.Right;
+
+                                updated = true;
+                            }
+                            else if (windowPosition.Top == otherWindowRect.Bottom || windowPosition.Bottom == otherWindowRect.Top)
+                            {
+                                if (Math.Abs(windowPosition.Left - otherWindowRect.Left) <= snapDistance)
+                                {
+                                    var sign = windowPosition.Left < otherWindowRect.Left ? -1 : 1;
+
+                                    windowPosition.Width += Math.Abs(otherWindowRect.Left - windowPosition.Left) * sign;
+                                    windowPosition.Left = otherWindowRect.Left;
+
+                                    updated = true;
+                                }
+                            }
+                        }
+                        else if (resizeSide.IsRight)
+                        {
+                            // Check the current window right against the other window left
+                            if (sourceRectangles.Right.IntersectsWith(targetRectangles.Left))
+                            {
+                                var sign = windowPosition.Right < otherWindowRect.Left ? 1 : -1;
+
+                                windowPosition.Width += Math.Abs(otherWindowRect.Left - windowPosition.Right) * sign;
+
+                                updated = true;
+                            }
+                            else if (windowPosition.Top == otherWindowRect.Bottom || windowPosition.Bottom == otherWindowRect.Top)
+                            {
+                                if (Math.Abs(windowPosition.Right - otherWindowRect.Right) <= snapDistance)
+                                {
+                                    var sign = windowPosition.Right < otherWindowRect.Right ? 1 : -1;
+
+                                    windowPosition.Width += Math.Abs(otherWindowRect.Right - windowPosition.Right) * sign;
+
+                                    updated = true;
+                                }
+                            }
+                        }
+
+                        if (resizeSide.IsBottom)
+                        {
+                            // Check the current window bottom against the other window top
+                            if (sourceRectangles.Bottom.IntersectsWith(targetRectangles.Top))
+                            {
+                                var sign = windowPosition.Bottom < otherWindowRect.Top ? 1 : -1;
+
+                                windowPosition.Height += Math.Abs(otherWindowRect.Top - windowPosition.Bottom) * sign;
+
+                                updated = true;
+                            }
+                            else if (windowPosition.Left == otherWindowRect.Right || windowPosition.Right == otherWindowRect.Left)
+                            {
+                                if (Math.Abs(otherWindowRect.Bottom - windowPosition.Bottom) <= snapDistance)
+                                {
+                                    var sign = windowPosition.Bottom < otherWindowRect.Bottom ? 1 : -1;
+
+                                    windowPosition.Height += Math.Abs(otherWindowRect.Bottom - windowPosition.Bottom) * sign;
+
+                                    updated = true;
+                                }
+                            }
+                        }
+                        else if (resizeSide.IsTop)
+                        {
+                            // Check the current window top against the other window bottom
+                            if (sourceRectangles.Top.IntersectsWith(targetRectangles.Bottom))
+                            {
+                                var sign = windowPosition.Top < otherWindowRect.Bottom ? 1 : -1;
+
+                                windowPosition.Height -= Math.Abs(otherWindowRect.Bottom - windowPosition.Top) * sign;
+                                windowPosition.Top = otherWindowRect.Bottom;
+
+                                updated = true;
+                            }
+                            else if (windowPosition.Left == otherWindowRect.Right || windowPosition.Right == otherWindowRect.Left)
+                            {
+                                if (Math.Abs(otherWindowRect.Top - windowPosition.Top) <= snapDistance)
+                                {
+                                    var sign = windowPosition.Top < otherWindowRect.Top ? -1 : 1;
+
+                                    windowPosition.Height += Math.Abs(otherWindowRect.Top - windowPosition.Top) * sign;
+                                    windowPosition.Top = otherWindowRect.Top;
+
+                                    updated = true;
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+
+            // Update the last window position
+            _lastWindowPosition = windowPosition;
+
+            if (!updated) return nint.Zero;
+
+            Marshal.StructureToPtr(windowPosition, lParam, true);
+            handled = true;
+
+            return nint.Zero;
+        }
+
+        #endregion
+    }
+}

WindowInformation.cs

@@ -0,0 +1,27 @@
+using System.Drawing;
+
+namespace ChrisKaczor.Wpf.Windows;
+
+public class WindowInformation
+{
+    private nint Handle { get; }
+    public Rectangle Location { get; }
+
+    public WindowInformation(nint handle)
+    {
+        Handle = handle;
+
+        var windowPlacement = new PInvoke.WindowPlacement();
+        PInvoke.GetWindowPlacement(Handle, ref windowPlacement);
+
+        var normalPosition = windowPlacement.NormalPosition;
+
+        Location = new Rectangle(normalPosition.X, normalPosition.Y, normalPosition.Width, normalPosition.Height);
+    }
+
+    public WindowInformation(nint handle, Rectangle location)
+    {
+        Handle = handle;
+        Location = location;
+    }
+}

Wpf.Windows.SnappingWindow.csproj

@@ -0,0 +1,27 @@
+<Project Sdk="Microsoft.NET.Sdk">
+	<PropertyGroup>
+		<TargetFramework>net7.0-windows</TargetFramework>
+		<Nullable>enable</Nullable>
+		<UseWPF>true</UseWPF>
+		<RootNamespace>ChrisKaczor.Wpf.Windows</RootNamespace>
+		<Title>ChrisKaczor.Wpf.Windows.SnappingWindow</Title>
+		<Authors>Chris Kaczor</Authors>
+		<Product>ChrisKaczor.Wpf.Windows.SnappingWindow</Product>
+		<RepositoryUrl>https://github.com/ckaczor/ChrisKaczor.Wpf.Windows.SnappingWindow</RepositoryUrl>
+		<PackageReadmeFile>README.md</PackageReadmeFile>
+		<Description>Extends the base WPF window to allow snapping to screen edges and/or other specified windows.</Description>
+		<PackageId>ChrisKaczor.Wpf.Windows.SnappingWindow</PackageId>
+		<PackageReadmeFile>README.md</PackageReadmeFile>
+		<AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+	</PropertyGroup>
+	<ItemGroup>
+		<PackageReference Include="JetBrains.Annotations" Version="2022.3.1" />
+		<PackageReference Include="WpfScreenHelper" Version="2.1.0" />
+	</ItemGroup>
+	<ItemGroup>
+		<None Update="README.md">
+			<Pack>True</Pack>
+			<PackagePath>\</PackagePath>
+		</None>
+	</ItemGroup>
+</Project>

Wpf.Windows.SnappingWindow.sln

@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.5.33424.131
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Wpf.Windows.SnappingWindow", "Wpf.Windows.SnappingWindow.csproj", "{E617775F-9345-4532-B883-3B227A5CAC9D}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{E617775F-9345-4532-B883-3B227A5CAC9D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{E617775F-9345-4532-B883-3B227A5CAC9D}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{E617775F-9345-4532-B883-3B227A5CAC9D}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{E617775F-9345-4532-B883-3B227A5CAC9D}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {80F2171E-35CA-4020-812E-DBA70B71E902}
+	EndGlobalSection
+EndGlobal

azure-pipelines.yml

@@ -0,0 +1,45 @@
+name: 1.0.$(Rev:r)
+
+pr: none
+
+trigger:
+  batch: 'true'
+  branches:
+    include:
+    - main
+
+pool:
+  vmImage: 'windows-latest'
+
+variables:
+  buildConfiguration: 'Release'
+
+steps:
+
+- task: DotNetCoreCLI@2
+  displayName: 'dotnet build'
+  inputs:
+    command: 'build'
+    arguments: '--configuration $(buildConfiguration)'
+    projects: 'Wpf.Windows.SnappingWindow.csproj'
+
+- task: DotNetCoreCLI@2
+  displayName: "dotnet pack"
+  inputs:
+    command: 'pack'
+    arguments: '--configuration $(buildConfiguration)'
+    packagesToPack: 'Wpf.Windows.SnappingWindow.csproj'
+    nobuild: true
+    versioningScheme: 'byBuildNumber'
+
+- task: NuGetCommand@2
+  displayName: 'nuget push'
+  inputs:
+    command: 'push'
+    feedsToUse: 'select'
+    packagesToPush: '$(Build.ArtifactStagingDirectory)/**/*.nupkg;!$(Build.ArtifactStagingDirectory)/**/*.symbols.nupkg'
+    nuGetFeedType: external
+    publishFeedCredentials: 'NuGet'
+    publishVstsFeed: 'Packages'
+    versioningScheme: 'byBuildNumber'
+    allowPackageConflicts: true