class/Managed.Windows.Forms/System.Windows.Forms/XplatUIDriver.cs

   1 // Permission is hereby granted, free of charge, to any person obtaining
   2 // a copy of this software and associated documentation files (the
   3 // "Software"), to deal in the Software without restriction, including
   4 // without limitation the rights to use, copy, modify, merge, publish,
   5 // distribute, sublicense, and/or sell copies of the Software, and to
   6 // permit persons to whom the Software is furnished to do so, subject to
   7 // the following conditions:
   8 //
   9 // The above copyright notice and this permission notice shall be
  10 // included in all copies or substantial portions of the Software.
  11 //
  12 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  13 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  14 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  15 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  16 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  17 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  18 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  19 //
  20 // Copyright (c) 2004-2006 Novell, Inc.
  21 //
  22 // Authors:
  23 //      Peter Bartok            pbartok@novell.com
  24 //      Sebastien Pouliot       sebastien@ximian.com
  25 //
  26
  27 // COMPLETE
  28
  29 using System.Drawing;
  30 using System.Threading;
  31 using System.Runtime.InteropServices;
  32
  33 namespace System.Windows.Forms {
  34         internal abstract class XplatUIDriver {
  35                 internal abstract IntPtr        InitializeDriver();
  36                 internal abstract void          ShutdownDriver(IntPtr token);
  37                 internal delegate IntPtr        WndProc(IntPtr hwnd, Msg msg, IntPtr wParam, IntPtr lParam);
  38
  39
  40                 #region XplatUI Driver Properties
  41                 internal virtual Color ForeColor {
  42                         get {
  43                                 return ThemeEngine.Current.DefaultWindowForeColor;
  44                         }
  45                 }
  46
  47                 internal virtual  Color BackColor {
  48                         get {
  49                                 return ThemeEngine.Current.DefaultWindowBackColor;
  50                         }
  51                 }
  52
  53                 internal virtual Font Font {
  54                         get {
  55                                 return ThemeEngine.Current.DefaultFont;
  56                         }
  57                 }
  58
  59                 internal virtual Keys ModifierKeys {
  60                         get {
  61                                 return Keys.None;
  62                         }
  63                 }
  64
  65                 internal virtual MouseButtons MouseButtons {
  66                         get {
  67                                 return MouseButtons.None;
  68                         }
  69                 }
  70
  71                 internal virtual Size MouseHoverSize {
  72                         get {
  73                                 return new Size (1, 1);
  74                         }
  75                 }
  76
  77                 internal virtual int MouseHoverTime {
  78                         get {
  79                                 return 500;
  80                         }
  81                 }
  82
  83                 internal virtual Point MousePosition {
  84                         get {
  85                                 return Point.Empty;
  86                         }
  87                 }
  88
  89                 internal virtual int MenuHeight {
  90                         get {
  91                                 return 19;
  92                         }
  93                 }
  94
  95                 internal virtual bool DropTarget {
  96                         get {
  97                                 return false;
  98                         }
  99
 100                         set {
 101                         }
 102                 }
 103
 104                 internal virtual int HorizontalScrollBarHeight {
 105                         get {
 106                                 return 16;
 107                         }
 108                 }
 109
 110                 internal virtual bool UserClipWontExposeParent {
 111                         get {
 112                                 return true;
 113                         }
 114                 }
 115
 116                 internal virtual int VerticalScrollBarWidth {
 117                         get {
 118                                 return 16;
 119                         }
 120                 }
 121
 122                 internal abstract int Caption { get; }
 123                 internal abstract Size CursorSize { get; }
 124                 internal abstract bool DragFullWindows { get; }
 125                 internal abstract Size DragSize { get; }
 126                 internal abstract Size FrameBorderSize { get; }
 127                 internal abstract Size IconSize { get; }
 128                 internal abstract Size MaxWindowTrackSize { get; }
 129                 internal abstract Size MinimizedWindowSize { get; }
 130                 internal abstract Size MinimizedWindowSpacingSize { get; }
 131                 internal abstract Size MinimumWindowSize { get; }
 132                 internal abstract Size MinWindowTrackSize { get; }
 133                 internal abstract Size SmallIconSize { get; }
 134                 internal abstract int MouseButtonCount { get; }
 135                 internal abstract bool MouseButtonsSwapped { get; }
 136                 internal abstract bool MouseWheelPresent { get; }
 137                 internal abstract Rectangle VirtualScreen { get; }
 138                 internal abstract Rectangle WorkingArea { get; }
 139                 internal abstract bool ThemesEnabled { get; }
 140
 141                 #endregion      // XplatUI Driver Properties
 142
 143                 internal abstract event EventHandler Idle;
 144
 145                 #region XplatUI Driver Methods
 146                 internal abstract void AudibleAlert();
 147
 148                 internal abstract void EnableThemes();
 149
 150                 internal abstract void GetDisplaySize(out Size size);
 151
 152                 internal abstract IntPtr CreateWindow(CreateParams cp);
 153                 internal abstract IntPtr CreateWindow(IntPtr Parent, int X, int Y, int Width, int Height);
 154                 internal abstract void DestroyWindow(IntPtr handle);
 155
 156                 internal abstract FormWindowState GetWindowState(IntPtr handle);
 157                 internal abstract void SetWindowState(IntPtr handle, FormWindowState state);
 158                 internal abstract void SetWindowMinMax(IntPtr handle, Rectangle maximized, Size min, Size max);
 159
 160                 internal abstract void SetWindowStyle(IntPtr handle, CreateParams cp);
 161
 162                 internal abstract double GetWindowTransparency(IntPtr handle);
 163                 internal abstract void SetWindowTransparency(IntPtr handle, double transparency, Color key);
 164                 internal abstract TransparencySupport SupportsTransparency();
 165
 166                 internal virtual void SetAllowDrop (IntPtr handle, bool value)
 167                 {
 168                         Console.Error.WriteLine ("Drag and Drop is currently " +
 169                                         "not supported on this platform");
 170                 }
 171
 172                 internal virtual DragDropEffects StartDrag(IntPtr handle, object data, DragDropEffects allowedEffects) {
 173                         Console.Error.WriteLine ("Drag and Drop is currently " +
 174                                         "not supported on this platform");
 175                         return DragDropEffects.None;
 176                 }
 177
 178                 internal abstract void SetBorderStyle(IntPtr handle, FormBorderStyle border_style);
 179                 internal abstract void SetMenu(IntPtr handle, Menu menu);
 180
 181                 internal abstract bool GetText(IntPtr handle, out string text);
 182                 internal abstract bool Text(IntPtr handle, string text);
 183                 internal abstract bool SetVisible(IntPtr handle, bool visible, bool activate);
 184                 internal abstract bool IsVisible(IntPtr handle);
 185                 internal abstract bool IsEnabled(IntPtr handle);
 186                 internal abstract IntPtr SetParent(IntPtr handle, IntPtr parent);
 187                 internal abstract IntPtr GetParent(IntPtr handle);
 188
 189                 internal abstract void UpdateWindow(IntPtr handle);
 190                 internal abstract PaintEventArgs PaintEventStart(IntPtr handle, bool client);
 191                 internal abstract void PaintEventEnd(IntPtr handle, bool client);
 192
 193                 internal abstract void SetWindowPos(IntPtr handle, int x, int y, int width, int height);
 194                 internal abstract void GetWindowPos(IntPtr handle, bool is_toplevel, out int x, out int y, out int width, out int height, out int client_width, out int client_height);
 195                 internal abstract void Activate(IntPtr handle);
 196                 internal abstract void EnableWindow(IntPtr handle, bool Enable);
 197                 internal abstract void SetModal(IntPtr handle, bool Modal);
 198                 internal abstract void Invalidate(IntPtr handle, Rectangle rc, bool clear);
 199                 internal abstract void InvalidateNC(IntPtr handle);
 200                 internal abstract IntPtr DefWndProc(ref Message msg);
 201                 internal abstract void HandleException(Exception e);
 202                 internal abstract void DoEvents();
 203                 internal abstract bool PeekMessage(Object queue_id, ref MSG msg, IntPtr hWnd, int wFilterMin, int wFilterMax, uint flags);
 204                 internal abstract void PostQuitMessage(int exitCode);
 205                 internal abstract bool GetMessage(object queue_id, ref MSG msg, IntPtr hWnd, int wFilterMin, int wFilterMax);
 206                 internal abstract bool TranslateMessage(ref MSG msg);
 207                 internal abstract IntPtr DispatchMessage(ref MSG msg);
 208
 209                 internal abstract bool SetZOrder(IntPtr hWnd, IntPtr AfterhWnd, bool Top, bool Bottom);
 210                 internal abstract bool SetTopmost(IntPtr hWnd, IntPtr hWndOwner, bool Enabled);
 211
 212                 internal abstract bool CalculateWindowRect(ref Rectangle ClientRect, int Style, int ExStyle, Menu menu, out Rectangle WindowRect);
 213
 214                 internal abstract Region GetClipRegion(IntPtr hwnd);
 215                 internal abstract void SetClipRegion(IntPtr hwnd, Region region);
 216
 217                 internal abstract void SetCursor(IntPtr hwnd, IntPtr cursor);
 218                 internal abstract void ShowCursor(bool show);
 219                 internal abstract void OverrideCursor(IntPtr cursor);
 220                 internal abstract IntPtr DefineCursor(Bitmap bitmap, Bitmap mask, Color cursor_pixel, Color mask_pixel, int xHotSpot, int yHotSpot);
 221                 internal abstract IntPtr DefineStdCursor(StdCursor id);
 222                 internal abstract void DestroyCursor(IntPtr cursor);
 223                 internal abstract void GetCursorInfo(IntPtr cursor, out int width, out int height, out int hotspot_x, out int hotspot_y);
 224
 225                 internal abstract void GetCursorPos(IntPtr hwnd, out int x, out int y);
 226                 internal abstract void SetCursorPos(IntPtr hwnd, int x, int y);
 227
 228                 internal abstract void ScreenToClient(IntPtr hwnd, ref int x, ref int y);
 229                 internal abstract void ClientToScreen(IntPtr hwnd, ref int x, ref int y);
 230
 231                 internal abstract void GrabWindow(IntPtr hwnd, IntPtr ConfineToHwnd);
 232                 internal abstract void GrabInfo(out IntPtr hwnd, out bool GrabConfined, out Rectangle GrabArea);
 233                 internal abstract void UngrabWindow(IntPtr hwnd);
 234
 235                 internal abstract void SendAsyncMethod (AsyncMethodData method);
 236                 internal abstract void SetTimer (Timer timer);
 237                 internal abstract void KillTimer (Timer timer);
 238
 239                 internal abstract void CreateCaret(IntPtr hwnd, int width, int height);
 240                 internal abstract void DestroyCaret(IntPtr hwnd);
 241                 internal abstract void SetCaretPos(IntPtr hwnd, int x, int y);
 242                 internal abstract void CaretVisible(IntPtr hwnd, bool visible);
 243
 244                 internal abstract IntPtr GetFocus();
 245                 internal abstract void SetFocus(IntPtr hwnd);
 246                 internal abstract IntPtr GetActive();
 247
 248                 internal abstract void ScrollWindow(IntPtr hwnd, Rectangle rectangle, int XAmount, int YAmount, bool with_children);
 249                 internal abstract void ScrollWindow(IntPtr hwnd, int XAmount, int YAmount, bool with_children);
 250
 251                 internal abstract bool GetFontMetrics(Graphics g, Font font, out int ascent, out int descent);
 252
 253                 internal abstract bool SystrayAdd(IntPtr hwnd, string tip, Icon icon, out ToolTip tt);
 254                 internal abstract bool SystrayChange(IntPtr hwnd, string tip, Icon icon, ref ToolTip tt);
 255                 internal abstract void SystrayRemove(IntPtr hwnd, ref ToolTip tt);
 256
 257                 internal abstract Point GetMenuOrigin(IntPtr hwnd);
 258                 internal abstract void MenuToScreen(IntPtr hwnd, ref int x, ref int y);
 259                 internal abstract void ScreenToMenu(IntPtr hwnd, ref int x, ref int y);
 260
 261                 internal abstract void SetIcon(IntPtr handle, Icon icon);
 262
 263                 internal abstract void ClipboardClose(IntPtr handle);
 264                 internal abstract IntPtr ClipboardOpen (bool primary_selection);
 265                 internal abstract int ClipboardGetID(IntPtr handle, string format);
 266                 internal abstract void ClipboardStore(IntPtr handle, object obj, int id, XplatUI.ObjectToClipboard converter);
 267                 internal abstract int[] ClipboardAvailableFormats(IntPtr handle);
 268                 internal abstract object ClipboardRetrieve(IntPtr handle, int id, XplatUI.ClipboardToObject converter);
 269
 270                 internal abstract void DrawReversibleLine(Point start, Point end, Color backColor);
 271                 internal abstract void DrawReversibleRectangle(IntPtr handle, Rectangle rect, int line_width);
 272                 internal abstract void FillReversibleRectangle (Rectangle rectangle, Color backColor);
 273                 internal abstract void DrawReversibleFrame (Rectangle rectangle, Color backColor, FrameStyle style);
 274
 275                 internal abstract SizeF GetAutoScaleSize(Font font);
 276
 277                 internal abstract IntPtr SendMessage(IntPtr hwnd, Msg message, IntPtr wParam, IntPtr lParam);
 278                 internal abstract bool PostMessage(IntPtr hwnd, Msg message, IntPtr wParam, IntPtr lParam);
 279
 280                 internal abstract object StartLoop(Thread thread);
 281                 internal abstract void EndLoop(Thread thread);
 282
 283                 internal abstract void RequestNCRecalc(IntPtr hwnd);
 284                 internal abstract void ResetMouseHover(IntPtr hwnd);
 285                 internal abstract void RequestAdditionalWM_NCMessages(IntPtr hwnd, bool hover, bool leave);
 286
 287                 // System information
 288                 internal abstract int KeyboardSpeed { get; }
 289                 internal abstract int KeyboardDelay { get; }
 290
 291
 292                 // Double buffering
 293                 internal virtual void CreateOffscreenDrawable (IntPtr handle,
 294                                                                int width, int height,
 295                                                                out object offscreen_drawable,
 296                                                                out Graphics offscreen_dc)
 297                 {
 298                         Bitmap bmp = new Bitmap (width, height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
 299
 300                         offscreen_drawable = bmp;
 301                         offscreen_dc = Graphics.FromImage (bmp);
 302                 }
 303
 304                 internal virtual void DestroyOffscreenDrawable (object offscreen_drawable,
 305                                                                 Graphics offscreen_dc)
 306                 {
 307                         Bitmap bmp = (Bitmap)offscreen_drawable;
 308
 309                         bmp.Dispose ();
 310                         offscreen_dc.Dispose ();
 311                 }
 312
 313                 internal virtual void BlitFromOffscreen (IntPtr dest_handle,
 314                                                          Graphics dest_dc,
 315                                                          object offscreen_drawable,
 316                                                          Graphics offscreen_dc,
 317                                                          Rectangle r)
 318                 {
 319                         dest_dc.DrawImage ((Bitmap)offscreen_drawable, r, r, GraphicsUnit.Pixel);
 320                 }
 321
 322 #endregion      // XplatUI Driver Methods
 323         }
 324
 325         internal class XplatUIDriverSupport {
 326                 #region XplatUI Driver Support Methods
 327 #if NET_2_0
 328                 internal static void ExecutionCallback (object state)
 329                 {
 330                         AsyncMethodData data = (AsyncMethodData) state;
 331                         AsyncMethodResult result = data.Result;
 332                         object ret = data.Method.DynamicInvoke (data.Args);
 333                         if (result != null) {
 334                                 result.Complete (ret);
 335                         }
 336                 }
 337
 338                 internal static void ExecuteClientMessage (GCHandle gchandle)
 339                 {
 340                         AsyncMethodData data = (AsyncMethodData) gchandle.Target;
 341                         try {
 342                                 if (data.Context == null) {
 343                                         ExecutionCallback (data);
 344                                 } else {
 345                                         ExecutionContext.Run (data.Context, new ContextCallback (ExecutionCallback), data);
 346                                 }
 347                         }
 348                         finally {
 349                                 gchandle.Free ();
 350                         }
 351                 }
 352 #else
 353                 // for NET_1_0 and NET_1_1 no (public) ExecutionContext exists
 354                 // so we must use the System.Threading.CompressedStack class
 355                 internal static void ExecuteClientMessage (GCHandle gchandle) {
 356                         AsyncMethodData data = (AsyncMethodData) gchandle.Target;
 357                         CompressedStack original = null;
 358
 359 #if !MWF_ON_MSRUNTIME
 360                         // Stack is non-null only if the security manager is active
 361                         if (data.Stack != null) {
 362                                 original = Thread.CurrentThread.GetCompressedStack ();
 363                                 Thread.CurrentThread.SetCompressedStack (data.Stack);
 364                         }
 365 #endif
 366
 367                         try {
 368                                 AsyncMethodResult result = data.Result;
 369                                 object ret = data.Method.DynamicInvoke (data.Args);
 370                                 result.Complete (ret);
 371                         }
 372                         finally {
 373 #if !MWF_ON_MSRUNTIME
 374                                 if (data.Stack != null) {
 375                                         // whatever occurs we must revert to the original compressed
 376                                         // stack (null being a valid, empty, value in this case).
 377                                         Thread.CurrentThread.SetCompressedStack (original);
 378                                 }
 379 #endif
 380                                 gchandle.Free ();
 381                         }
 382                 }
 383 #endif
 384
 385                 #endregion      // XplatUI Driver Support Methods
 386         }
 387 }