public override void Execute(SnapAction action, IJobContext context)
{
var workingArea = context.Display.WorkingArea;
var bounds = context.Window.Bounds;
switch (action.ResizeType)
{
case ResizeType.Vertical:
bounds = new Rectangle(
bounds.Left,
workingArea.Top,
bounds.Width,
workingArea.Height);
break;
case ResizeType.Horizontal:
bounds = new Rectangle(
workingArea.Left,
bounds.Top,
workingArea.Width,
bounds.Height);
break;
default:
return;
}
bounds += context.Window.Border;
User32Api.SetWindowPos(context.Window.Handle, IntPtr.Zero, bounds.X, bounds.Y, bounds.Width, bounds.Height, WindowPos.SWP_SHOWWINDOW);
}
public void SetTopMost(bool isTopMost)
{
var topMostHandle = isTopMost ? HWnd.TopMost : HWnd.NoTopMost;
User32Api.SetWindowPos(WindowHandle, topMostHandle, 0, 0, 0, 0,
SetWindowPosFlags.IgnoreMove | SetWindowPosFlags.IgnoreResize);
}
public override void Execute(PlacementAction action, IJobContext context)
{
var display = context.Display;
if (action.Placement.DisplayIndex is int displayIndex)
{
if (_displayService.Displays.ContainsKey(displayIndex))
{
display = _displayService.Displays[displayIndex];
}
else
{
return;
}
}
if (action.Placement.Bounds == null)
{
var bounds = display.WorkingArea;
User32Api.SetWindowPos(context.Window.Handle, IntPtr.Zero, bounds.X, bounds.Y, bounds.Width, bounds.Height, WindowPos.SWP_SHOWWINDOW);
User32Api.ShowWindow(context.Window.Handle, ShowWindowCommands.ShowMaximized);
}
else
{
var bounds = display.WorkingArea.CropByPercentage(action.Placement.Bounds) + context.Window.Border;
User32Api.SetWindowPos(context.Window.Handle, IntPtr.Zero, bounds.X, bounds.Y, bounds.Width, bounds.Height, WindowPos.SWP_SHOWWINDOW);
}
}
/// <summary>
/// Show the thumbnail of the supplied window above (or under) the parent Control
/// </summary>
/// <param name="window">WindowDetails</param>
/// <param name="parentControl">Control</param>
public void ShowThumbnail(IInteropWindow window, Control parentControl)
{
UnregisterThumbnail();
Dwm.DwmRegisterThumbnail(Handle, window.Handle, out _thumbnailHandle);
if (_thumbnailHandle == IntPtr.Zero)
{
return;
}
Dwm.DwmQueryThumbnailSourceSize(_thumbnailHandle, out var sourceSize);
var thumbnailHeight = 200;
var thumbnailWidth = (int)(thumbnailHeight * (sourceSize.Width / (float)sourceSize.Height));
if (parentControl != null && thumbnailWidth > parentControl.Width)
{
thumbnailWidth = parentControl.Width;
thumbnailHeight = (int)(thumbnailWidth * (sourceSize.Height / (float)sourceSize.Width));
}
Width = thumbnailWidth;
Height = thumbnailHeight;
// Prepare the displaying of the Thumbnail
var props = new DwmThumbnailProperties
{
Opacity = 255,
Visible = true,
SourceClientAreaOnly = false,
Destination = new NativeRect(0, 0, thumbnailWidth, thumbnailHeight)
};
Dwm.DwmUpdateThumbnailProperties(_thumbnailHandle, ref props);
if (parentControl != null)
{
AlignToControl(parentControl);
}
if (!Visible)
{
Show();
}
// Make sure it's on "top"!
if (parentControl != null)
{
User32Api.SetWindowPos(Handle, parentControl.Handle, 0, 0, 0, 0, WindowPos.SWP_NOMOVE | WindowPos.SWP_NOSIZE | WindowPos.SWP_NOACTIVATE);
}
}
/// <summary>
/// Move the specified window to a new location
/// </summary>
/// <param name="interopWindow">IInteropWindow</param>
/// <param name="location">NativePoint with the offset</param>
/// <returns>IInteropWindow for fluent calls</returns>
public static IInteropWindow MoveTo(this IInteropWindow interopWindow, NativePoint location)
{
User32Api.SetWindowPos(interopWindow.Handle, IntPtr.Zero, location.X, location.Y, 0, 0, WindowPos.SWP_NOSIZE | WindowPos.SWP_SHOWWINDOW | WindowPos.SWP_NOACTIVATE | WindowPos.SWP_NOZORDER);
interopWindow.Info = null;
return(interopWindow);
}
/// <summary>
/// Message handler of the Per_Monitor_DPI_Aware window.
/// The handles the WM_DPICHANGED message and adjusts window size, graphics and text based on the DPI of the monitor.
/// The window message provides the new window size (lparam) and new DPI (wparam)
/// See
/// <a href="https://msdn.microsoft.com/en-us/library/windows/desktop/dn312083(v=vs.85).aspx">WM_DPICHANGED message</a>
/// </summary>
/// <param name="windowMessageInfo">WindowMessageInfo</param>
/// <returns>IntPtr</returns>
internal bool HandleWindowMessages(WindowMessageInfo windowMessageInfo)
{
bool handled = false;
var currentDpi = DefaultScreenDpi;
bool isDpiMessage = false;
switch (windowMessageInfo.Message)
{
// Handle the WM_NCCREATE for Forms / controls, for WPF this is done differently
case WindowsMessages.WM_NCCREATE:
if (Log.IsVerboseEnabled())
{
Log.Verbose().WriteLine("Processing {0} event, enabling DPI scaling for window {1}", windowMessageInfo.Message, windowMessageInfo.Handle);
}
TryEnableNonClientDpiScaling(windowMessageInfo.Handle);
break;
// Handle the WM_CREATE, this is where we can get the DPI via system calls
case WindowsMessages.WM_CREATE:
isDpiMessage = true;
if (Log.IsVerboseEnabled())
{
Log.Verbose().WriteLine("Processing {0} event, retrieving DPI for window {1}", windowMessageInfo.Message, windowMessageInfo.Handle);
}
currentDpi = NativeDpiMethods.GetDpi(windowMessageInfo.Handle);
_scopedThreadDpiAwarenessContext.Dispose();
break;
// Handle the DPI change message, this is where it's supplied
case WindowsMessages.WM_DPICHANGED:
isDpiMessage = true;
if (Log.IsVerboseEnabled())
{
Log.Verbose().WriteLine("Processing {0} event, resizing / positioning window {1}", windowMessageInfo.Message, windowMessageInfo.Handle);
}
// Retrieve the adviced location
var lprNewRect = (NativeRect)Marshal.PtrToStructure(windowMessageInfo.LongParam, typeof(NativeRect));
// Move the window to it's location, and resize
User32Api.SetWindowPos(windowMessageInfo.Handle,
IntPtr.Zero,
lprNewRect.Left,
lprNewRect.Top,
lprNewRect.Width,
lprNewRect.Height,
WindowPos.SWP_NOZORDER | WindowPos.SWP_NOOWNERZORDER | WindowPos.SWP_NOACTIVATE);
currentDpi = (uint)windowMessageInfo.WordParam & 0xFFFF;
// specify that the message was handled
handled = true;
break;
case WindowsMessages.WM_PAINT:
// This is a workaround for non DPI aware applications, these don't seem to get a WM_CREATE
if (Dpi == 0)
{
isDpiMessage = true;
currentDpi = NativeDpiMethods.GetDpi(windowMessageInfo.Handle);
}
break;
case WindowsMessages.WM_SETICON:
// This is a workaround for handling WinProc outside of the class
if (_needsListenerWorkaround)
{
isDpiMessage = true;
// disable workaround
_needsListenerWorkaround = false;
currentDpi = NativeDpiMethods.GetDpi(windowMessageInfo.Handle);
}
break;
case WindowsMessages.WM_DPICHANGED_BEFOREPARENT:
if (Log.IsVerboseEnabled())
{
Log.Verbose().WriteLine("Dpi changed on {0} before parent", windowMessageInfo.Handle);
}
break;
case WindowsMessages.WM_DPICHANGED_AFTERPARENT:
if (Log.IsVerboseEnabled())
{
Log.Verbose().WriteLine("Dpi changed on {0} after parent", windowMessageInfo.Handle);
}
break;
case WindowsMessages.WM_DESTROY:
if (Log.IsVerboseEnabled())
{
Log.Verbose().WriteLine("Completing the observable for {0}", windowMessageInfo.Handle);
}
// If the window is destroyed, we complete the subject
_onDpiChanged.OnCompleted();
// Dispose all resources
Dispose();
break;
}
// Check if the DPI was changed, if so call the action (if any)
if (!isDpiMessage)
{
return(false);
}
if (Dpi != currentDpi)
{
var beforeDpi = Dpi;
if (Log.IsVerboseEnabled())
{
Log.Verbose().WriteLine("Changing DPI from {0} to {1}", beforeDpi, currentDpi);
}
Dpi = currentDpi;
_onDpiChanged.OnNext(new DpiChangeInfo(beforeDpi, currentDpi));
}
else if (Log.IsVerboseEnabled())
{
Log.Verbose().WriteLine("DPI was unchanged from {0}", Dpi);
}
return(handled);
}
/// <summary>
/// Message handler of the Per_Monitor_DPI_Aware window.
/// The handles the WM_DPICHANGED message and adjusts window size, graphics and text based on the DPI of the monitor.
/// The window message provides the new window size (lparam) and new DPI (wparam)
/// See
/// <a href="https://msdn.microsoft.com/en-us/library/windows/desktop/dn312083(v=vs.85).aspx">WM_DPICHANGED message</a>
/// </summary>
/// <param name="hwnd">IntPtr with the hWnd</param>
/// <param name="msg">The Windows message</param>
/// <param name="wParam">IntPtr</param>
/// <param name="lParam">IntPtr</param>
/// <param name="handled">ref bool</param>
/// <returns>IntPtr</returns>
internal IntPtr HandleWindowMessages(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
var windowsMessage = (WindowsMessages)msg;
var currentDpi = (int)DefaultScreenDpi;
bool isDpiMessage = false;
switch (windowsMessage)
{
// Handle the WM_NCCREATE for Forms / controls, for WPF this is done differently
case WindowsMessages.WM_NCCREATE:
TryEnableNonClientDpiScaling(hwnd);
break;
// Handle the WM_CREATE, this is where we can get the DPI via system calls
case WindowsMessages.WM_CREATE:
isDpiMessage = true;
Log.Verbose().WriteLine("Processing {0} event, retrieving DPI for window {1}", windowsMessage, hwnd);
currentDpi = GetDpi(hwnd);
break;
// Handle the DPI change message, this is where it's supplied
case WindowsMessages.WM_DPICHANGED:
isDpiMessage = true;
Log.Verbose().WriteLine("Processing {0} event, resizing / positioning window {1}", windowsMessage, hwnd);
// Retrieve the adviced location
var lprNewRect = (NativeRect)Marshal.PtrToStructure(lParam, typeof(NativeRect));
// Move the window to it's location, and resize
User32Api.SetWindowPos(hwnd,
IntPtr.Zero,
lprNewRect.Left,
lprNewRect.Top,
lprNewRect.Width,
lprNewRect.Height,
WindowPos.SWP_NOZORDER | WindowPos.SWP_NOOWNERZORDER | WindowPos.SWP_NOACTIVATE);
currentDpi = wParam.ToInt32() & 0xFFFF;
// specify that the message was handled
handled = true;
break;
case WindowsMessages.WM_PAINT:
// This is a workaround for non DPI aware applications, these don't seem to get a WM_CREATE
if (Math.Abs(Dpi) < double.Epsilon && !IsDpiAware)
{
isDpiMessage = true;
currentDpi = GetDpi(hwnd);
}
break;
case WindowsMessages.WM_SETICON:
// This is a workaround for handling WinProc outside of the class
if (_needsListenerWorkaround)
{
isDpiMessage = true;
// disable workaround
_needsListenerWorkaround = false;
currentDpi = GetDpi(hwnd);
}
break;
case WindowsMessages.WM_DESTROY:
// If the window is destroyed, we complete the subject
_onDpiChanged.OnCompleted();
break;
}
// Check if the DPI was changed, if so call the action (if any)
if (!isDpiMessage)
{
return(IntPtr.Zero);
}
if (!IsEqual(Dpi, currentDpi))
{
var beforeDpi = Dpi;
Log.Verbose().WriteLine("Changing DPI from {0} to {1}", beforeDpi, currentDpi);
_onDpiChangeInfo.OnNext(new DpiChangeInfo(DpiChangeEventTypes.Before, beforeDpi, currentDpi));
Dpi = currentDpi;
_onDpiChanged.OnNext(Dpi);
_onDpiChangeInfo.OnNext(new DpiChangeInfo(DpiChangeEventTypes.Change, beforeDpi, currentDpi));
_onDpiChangeInfo.OnNext(new DpiChangeInfo(DpiChangeEventTypes.After, beforeDpi, currentDpi));
}
else
{
Log.Verbose().WriteLine("DPI was unchanged from {0}", Dpi);
}
return(IntPtr.Zero);
}
