1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/GUI/GadgetWindow.cs Mon Sep 06 19:53:13 2010 +0000
1.3 @@ -0,0 +1,423 @@
1.4 +/*
1.5 +
1.6 + Version: MPL 1.1/GPL 2.0/LGPL 2.1
1.7 +
1.8 + The contents of this file are subject to the Mozilla Public License Version
1.9 + 1.1 (the "License"); you may not use this file except in compliance with
1.10 + the License. You may obtain a copy of the License at
1.11 +
1.12 + http://www.mozilla.org/MPL/
1.13 +
1.14 + Software distributed under the License is distributed on an "AS IS" basis,
1.15 + WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
1.16 + for the specific language governing rights and limitations under the License.
1.17 +
1.18 + The Original Code is the Open Hardware Monitor code.
1.19 +
1.20 + The Initial Developer of the Original Code is
1.21 + Michael Möller <m.moeller@gmx.ch>.
1.22 + Portions created by the Initial Developer are Copyright (C) 2010
1.23 + the Initial Developer. All Rights Reserved.
1.24 +
1.25 + Contributor(s):
1.26 +
1.27 + Alternatively, the contents of this file may be used under the terms of
1.28 + either the GNU General Public License Version 2 or later (the "GPL"), or
1.29 + the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
1.30 + in which case the provisions of the GPL or the LGPL are applicable instead
1.31 + of those above. If you wish to allow use of your version of this file only
1.32 + under the terms of either the GPL or the LGPL, and not to allow others to
1.33 + use your version of this file under the terms of the MPL, indicate your
1.34 + decision by deleting the provisions above and replace them with the notice
1.35 + and other provisions required by the GPL or the LGPL. If you do not delete
1.36 + the provisions above, a recipient may use your version of this file under
1.37 + the terms of any one of the MPL, the GPL or the LGPL.
1.38 +
1.39 +*/
1.40 +
1.41 +using System;
1.42 +using System.Drawing;
1.43 +using System.Reflection;
1.44 +using System.Runtime.InteropServices;
1.45 +using System.Windows.Forms;
1.46 +
1.47 +namespace OpenHardwareMonitor.GUI {
1.48 + public class GadgetWindow : NativeWindow {
1.49 +
1.50 + private bool visible = false;
1.51 + private bool lockPosition = false;
1.52 + private bool alwaysOnTop = false;
1.53 + private byte opacity = 255;
1.54 + private Point location = new Point(100, 100);
1.55 + private Size size = new Size(130, 84);
1.56 + private ContextMenu contextMenu = null;
1.57 + private MethodInfo commandDispatch;
1.58 +
1.59 + public GadgetWindow() {
1.60 + Type commandType =
1.61 + typeof(Form).Assembly.GetType("System.Windows.Forms.Command");
1.62 + commandDispatch = commandType.GetMethod("DispatchID",
1.63 + BindingFlags.Static | BindingFlags.NonPublic | BindingFlags.Public,
1.64 + null, new Type[]{ typeof(int) }, null);
1.65 +
1.66 + this.CreateHandle(CreateParams);
1.67 +
1.68 + // move window to the bottom
1.69 + MoveToBottom(Handle);
1.70 +
1.71 + // prevent window from fading to a glass sheet when peek is invoked
1.72 + try {
1.73 + bool value = true;
1.74 + int r = NativeMethods.DwmSetWindowAttribute(Handle,
1.75 + WindowAttribute.DWMWA_EXCLUDED_FROM_PEEK, ref value,
1.76 + Marshal.SizeOf(value));
1.77 + } catch (DllNotFoundException) { } catch (EntryPointNotFoundException) { }
1.78 + }
1.79 +
1.80 + private void ShowDesktopChanged(bool showDesktop) {
1.81 + if (showDesktop) {
1.82 + MoveToTopMost(Handle);
1.83 + } else {
1.84 + MoveToBottom(Handle);
1.85 + }
1.86 + }
1.87 +
1.88 + private void MoveToBottom(IntPtr handle) {
1.89 + NativeMethods.SetWindowPos(handle, HWND_BOTTOM, 0, 0, 0, 0,
1.90 + SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE | SWP_NOSENDCHANGING);
1.91 + }
1.92 +
1.93 + private void MoveToTopMost(IntPtr handle) {
1.94 + NativeMethods.SetWindowPos(handle, HWND_TOPMOST, 0, 0, 0, 0,
1.95 + SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE | SWP_NOSENDCHANGING);
1.96 + }
1.97 +
1.98 + private void ShowContextMenu(Point position) {
1.99 + NativeMethods.TrackPopupMenuEx(contextMenu.Handle,
1.100 + TPM_RIGHTBUTTON | TPM_VERTICAL, position.X,
1.101 + position.Y, Handle, IntPtr.Zero);
1.102 + }
1.103 +
1.104 + protected virtual CreateParams CreateParams {
1.105 + get {
1.106 + CreateParams cp = new CreateParams();
1.107 + cp.Width = size.Width;
1.108 + cp.Height = size.Height;
1.109 + cp.X = location.X;
1.110 + cp.Y = location.Y;
1.111 + cp.ExStyle = WS_EX_LAYERED | WS_EX_TOOLWINDOW;
1.112 + return cp;
1.113 + }
1.114 + }
1.115 +
1.116 + protected override void WndProc(ref Message message) {
1.117 + switch (message.Msg) {
1.118 + case WM_COMMAND:
1.119 + // need to dispatch the message for the context menu
1.120 + if (message.LParam == IntPtr.Zero)
1.121 + commandDispatch.Invoke(null, new object[] {
1.122 + message.WParam.ToInt32() & 0xFFFF });
1.123 + break;
1.124 + case WM_NCHITTEST:
1.125 + // all pixels of the form belong to the caption
1.126 + message.Result = HTCAPTION;
1.127 + break;
1.128 + case WM_NCLBUTTONDBLCLK:
1.129 + message.Result = IntPtr.Zero; break;
1.130 + case WM_NCRBUTTONDOWN:
1.131 + message.Result = IntPtr.Zero; break;
1.132 + case WM_NCRBUTTONUP:
1.133 + if (contextMenu != null)
1.134 + ShowContextMenu(new Point(
1.135 + (int)((uint)message.LParam & 0xFFFF),
1.136 + (int)(((uint)message.LParam >>16) & 0xFFFF)));
1.137 + message.Result = IntPtr.Zero;
1.138 + break;
1.139 + case WM_WINDOWPOSCHANGING:
1.140 + WindowPos wp = (WindowPos)Marshal.PtrToStructure(
1.141 + message.LParam, typeof(WindowPos));
1.142 +
1.143 + // add the nomove flag if position is locked
1.144 + if (lockPosition)
1.145 + wp.flags |= SWP_NOMOVE;
1.146 +
1.147 + // prevent the window from leaving the screen
1.148 + if ((wp.flags & SWP_NOMOVE) == 0) {
1.149 + Rectangle rect = Screen.GetWorkingArea(new Point(wp.x, wp.y));
1.150 + const int margin = 20;
1.151 + wp.x = Math.Max(wp.x, rect.Left - wp.cx + margin);
1.152 + wp.x = Math.Min(wp.x, rect.Right - margin);
1.153 + wp.y = Math.Max(wp.y, rect.Top - wp.cy + margin);
1.154 + wp.y = Math.Min(wp.y, rect.Bottom - margin);
1.155 +
1.156 + // raise the event if location changed
1.157 + if (location.X != wp.x || location.Y != wp.y) {
1.158 + location = new Point(wp.x, wp.y);
1.159 + if (LocationChanged != null)
1.160 + LocationChanged(this, EventArgs.Empty);
1.161 + }
1.162 + }
1.163 +
1.164 + Marshal.StructureToPtr(wp, message.LParam, false);
1.165 + message.Result = IntPtr.Zero;
1.166 + break;
1.167 + default:
1.168 + base.WndProc(ref message); break;
1.169 + }
1.170 + }
1.171 +
1.172 + private BlendFunction CreateBlendFunction() {
1.173 + BlendFunction blend = new BlendFunction();
1.174 + blend.BlendOp = AC_SRC_OVER;
1.175 + blend.BlendFlags = 0;
1.176 + blend.SourceConstantAlpha = opacity;
1.177 + blend.AlphaFormat = AC_SRC_ALPHA;
1.178 + return blend;
1.179 + }
1.180 +
1.181 + public void Update(Bitmap bitmap) {
1.182 + IntPtr screen = NativeMethods.GetDC(IntPtr.Zero);
1.183 + IntPtr memory = NativeMethods.CreateCompatibleDC(screen);
1.184 + IntPtr newHBitmap = IntPtr.Zero;
1.185 + IntPtr oldHBitmap = IntPtr.Zero;
1.186 +
1.187 + try {
1.188 + newHBitmap = bitmap.GetHbitmap(Color.Black);
1.189 + oldHBitmap = NativeMethods.SelectObject(memory, newHBitmap);
1.190 +
1.191 + Size size = bitmap.Size;
1.192 + Point pointSource = Point.Empty;
1.193 + Point topPos = Location;
1.194 +
1.195 + BlendFunction blend = CreateBlendFunction();
1.196 + NativeMethods.UpdateLayeredWindow(Handle, screen, ref topPos,
1.197 + ref size, memory, ref pointSource, 0, ref blend, ULW_ALPHA);
1.198 + } finally {
1.199 + NativeMethods.ReleaseDC(IntPtr.Zero, screen);
1.200 + if (newHBitmap != IntPtr.Zero) {
1.201 + NativeMethods.SelectObject(memory, oldHBitmap);
1.202 + NativeMethods.DeleteObject(newHBitmap);
1.203 + }
1.204 + NativeMethods.DeleteDC(memory);
1.205 + }
1.206 + }
1.207 +
1.208 + public byte Opacity {
1.209 + get {
1.210 + return opacity;
1.211 + }
1.212 + set {
1.213 + if (opacity != value) {
1.214 + opacity = value;
1.215 + BlendFunction blend = CreateBlendFunction();
1.216 + NativeMethods.UpdateLayeredWindow(Handle, IntPtr.Zero, IntPtr.Zero,
1.217 + IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, 0, ref blend, ULW_ALPHA);
1.218 + }
1.219 + }
1.220 + }
1.221 +
1.222 + public bool Visible {
1.223 + get {
1.224 + return visible;
1.225 + }
1.226 + set {
1.227 + if (visible != value) {
1.228 + visible = value;
1.229 + NativeMethods.SetWindowPos(Handle, IntPtr.Zero, 0, 0, 0, 0,
1.230 + SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE | SWP_NOZORDER |
1.231 + (value ? SWP_SHOWWINDOW : SWP_HIDEWINDOW));
1.232 + if (value)
1.233 + ShowDesktop.Instance.ShowDesktopChanged += ShowDesktopChanged;
1.234 + else
1.235 + ShowDesktop.Instance.ShowDesktopChanged -= ShowDesktopChanged;
1.236 + }
1.237 + }
1.238 + }
1.239 +
1.240 + // if locked, the window can not be moved
1.241 + public bool LockPosition {
1.242 + get {
1.243 + return lockPosition;
1.244 + }
1.245 + set {
1.246 + lockPosition = value;
1.247 + }
1.248 + }
1.249 +
1.250 + public bool AlwaysOnTop {
1.251 + get {
1.252 + return alwaysOnTop;
1.253 + }
1.254 + set {
1.255 + if (value != alwaysOnTop) {
1.256 + alwaysOnTop = value;
1.257 + if (alwaysOnTop) {
1.258 + ShowDesktop.Instance.ShowDesktopChanged -= ShowDesktopChanged;
1.259 + MoveToTopMost(Handle);
1.260 + } else {
1.261 + MoveToBottom(Handle);
1.262 + ShowDesktop.Instance.ShowDesktopChanged += ShowDesktopChanged;
1.263 + }
1.264 + }
1.265 + }
1.266 + }
1.267 +
1.268 + public Size Size {
1.269 + get {
1.270 + return size;
1.271 + }
1.272 + set {
1.273 + if (size != value) {
1.274 + size = value;
1.275 + NativeMethods.SetWindowPos(Handle, IntPtr.Zero, 0, 0, size.Width,
1.276 + size.Height, SWP_NOMOVE | SWP_NOACTIVATE | SWP_NOZORDER |
1.277 + SWP_NOSENDCHANGING);
1.278 + }
1.279 + }
1.280 + }
1.281 +
1.282 + public Point Location {
1.283 + get {
1.284 + return location;
1.285 + }
1.286 + set {
1.287 + NativeMethods.SetWindowPos(Handle, IntPtr.Zero, value.X, value.Y, 0,
1.288 + 0, SWP_NOSIZE | SWP_NOACTIVATE | SWP_NOZORDER | SWP_NOSENDCHANGING);
1.289 + location = value;
1.290 + if (LocationChanged != null)
1.291 + LocationChanged(this, EventArgs.Empty);
1.292 + }
1.293 + }
1.294 +
1.295 + public event EventHandler LocationChanged;
1.296 +
1.297 + public ContextMenu ContextMenu {
1.298 + get {
1.299 + return contextMenu;
1.300 + }
1.301 + set {
1.302 + this.contextMenu = value;
1.303 + }
1.304 + }
1.305 +
1.306 + [StructLayout(LayoutKind.Sequential, Pack = 1)]
1.307 + private struct BlendFunction {
1.308 + public byte BlendOp;
1.309 + public byte BlendFlags;
1.310 + public byte SourceConstantAlpha;
1.311 + public byte AlphaFormat;
1.312 + }
1.313 +
1.314 + [StructLayout(LayoutKind.Sequential, Pack = 1)]
1.315 + private struct WindowPos {
1.316 + public IntPtr hwnd;
1.317 + public IntPtr hwndInsertAfter;
1.318 + public int x;
1.319 + public int y;
1.320 + public int cx;
1.321 + public int cy;
1.322 + public uint flags;
1.323 + }
1.324 +
1.325 + public static readonly IntPtr HWND_BOTTOM = (IntPtr)1;
1.326 + public static readonly IntPtr HWND_TOPMOST = (IntPtr)(-1);
1.327 +
1.328 + public const int WS_EX_LAYERED = 0x00080000;
1.329 + public const int WS_EX_TOOLWINDOW = 0x00000080;
1.330 +
1.331 + public const uint SWP_NOSIZE = 0x0001;
1.332 + public const uint SWP_NOMOVE = 0x0002;
1.333 + public const uint SWP_NOACTIVATE = 0x0010;
1.334 + public const uint SWP_HIDEWINDOW = 0x0080;
1.335 + public const uint SWP_SHOWWINDOW = 0x0040;
1.336 + public const uint SWP_NOZORDER = 0x0004;
1.337 + public const uint SWP_NOSENDCHANGING = 0x0400;
1.338 +
1.339 + public const int ULW_COLORKEY = 0x00000001;
1.340 + public const int ULW_ALPHA = 0x00000002;
1.341 + public const int ULW_OPAQUE = 0x00000004;
1.342 +
1.343 + public const byte AC_SRC_OVER = 0x00;
1.344 + public const byte AC_SRC_ALPHA = 0x01;
1.345 +
1.346 + public const int WM_NCHITTEST = 0x0084;
1.347 + public const int WM_NCLBUTTONDBLCLK = 0x00A3;
1.348 + public const int WM_NCLBUTTONDOWN = 0x00A1;
1.349 + public const int WM_NCLBUTTONUP = 0x00A2;
1.350 + public const int WM_NCRBUTTONDOWN = 0x00A4;
1.351 + public const int WM_NCRBUTTONUP = 0x00A5;
1.352 + public const int WM_WINDOWPOSCHANGING = 0x0046;
1.353 + public const int WM_COMMAND = 0x0111;
1.354 +
1.355 + public const int TPM_RIGHTBUTTON = 0x0002;
1.356 + public const int TPM_VERTICAL = 0x0040;
1.357 +
1.358 + public readonly IntPtr HTCAPTION = (IntPtr)2;
1.359 +
1.360 + private enum WindowAttribute : int {
1.361 + DWMWA_NCRENDERING_ENABLED = 1,
1.362 + DWMWA_NCRENDERING_POLICY,
1.363 + DWMWA_TRANSITIONS_FORCEDISABLED,
1.364 + DWMWA_ALLOW_NCPAINT,
1.365 + DWMWA_CAPTION_BUTTON_BOUNDS,
1.366 + DWMWA_NONCLIENT_RTL_LAYOUT,
1.367 + DWMWA_FORCE_ICONIC_REPRESENTATION,
1.368 + DWMWA_FLIP3D_POLICY,
1.369 + DWMWA_EXTENDED_FRAME_BOUNDS,
1.370 + DWMWA_HAS_ICONIC_BITMAP,
1.371 + DWMWA_DISALLOW_PEEK,
1.372 + DWMWA_EXCLUDED_FROM_PEEK,
1.373 + DWMWA_LAST
1.374 + }
1.375 +
1.376 + private static class NativeMethods {
1.377 + private const string USER = "user32.dll";
1.378 + private const string GDI = "gdi32.dll";
1.379 + public const string DWMAPI = "dwmapi.dll";
1.380 +
1.381 + [DllImport(USER, CallingConvention = CallingConvention.Winapi)]
1.382 + [return: MarshalAs(UnmanagedType.Bool)]
1.383 + public static extern bool UpdateLayeredWindow(IntPtr hwnd, IntPtr hdcDst,
1.384 + ref Point pptDst, ref Size psize, IntPtr hdcSrc, ref Point pprSrc,
1.385 + int crKey, ref BlendFunction pblend, int dwFlags);
1.386 +
1.387 + [DllImport(USER, CallingConvention = CallingConvention.Winapi)]
1.388 + [return: MarshalAs(UnmanagedType.Bool)]
1.389 + public static extern bool UpdateLayeredWindow(IntPtr hwnd, IntPtr hdcDst,
1.390 + IntPtr pptDst, IntPtr psize, IntPtr hdcSrc, IntPtr pprSrc,
1.391 + int crKey, ref BlendFunction pblend, int dwFlags);
1.392 +
1.393 + [DllImport(USER, CallingConvention = CallingConvention.Winapi)]
1.394 + public static extern IntPtr GetDC(IntPtr hWnd);
1.395 +
1.396 + [DllImport(USER, CallingConvention = CallingConvention.Winapi)]
1.397 + public static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC);
1.398 +
1.399 + [DllImport(USER, CallingConvention = CallingConvention.Winapi)]
1.400 + public static extern bool SetWindowPos(IntPtr hWnd,
1.401 + IntPtr hWndInsertAfter, int X, int Y, int cx, int cy, uint uFlags);
1.402 +
1.403 + [DllImport(USER, CallingConvention = CallingConvention.Winapi)]
1.404 + public static extern bool TrackPopupMenuEx(IntPtr hMenu, uint uFlags,
1.405 + int x, int y, IntPtr hWnd, IntPtr tpmParams);
1.406 +
1.407 + [DllImport(GDI, CallingConvention = CallingConvention.Winapi)]
1.408 + public static extern IntPtr CreateCompatibleDC(IntPtr hDC);
1.409 +
1.410 + [DllImport(GDI, CallingConvention = CallingConvention.Winapi)]
1.411 + [return: MarshalAs(UnmanagedType.Bool)]
1.412 + public static extern bool DeleteDC(IntPtr hdc);
1.413 +
1.414 + [DllImport(GDI, CallingConvention = CallingConvention.Winapi)]
1.415 + public static extern IntPtr SelectObject(IntPtr hDC, IntPtr hObject);
1.416 +
1.417 + [DllImport(GDI, CallingConvention = CallingConvention.Winapi)]
1.418 + [return: MarshalAs(UnmanagedType.Bool)]
1.419 + public static extern bool DeleteObject(IntPtr hObject);
1.420 +
1.421 + [DllImport(DWMAPI, CallingConvention = CallingConvention.Winapi)]
1.422 + public static extern int DwmSetWindowAttribute(IntPtr hwnd,
1.423 + WindowAttribute dwAttribute, ref bool pvAttribute, int cbAttribute);
1.424 + }
1.425 + }
1.426 +}