mcs/class/Managed.Windows.Forms/System.Windows.Forms.CarbonInternal/ControlHandler.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) 2007 Novell, Inc.
  21 //
  22 // Authors:
  23 //      Geoff Norton  <gnorton@novell.com>
  24 //
  25 //
  26
  27 using System;
  28 using System.Drawing;
  29 using System.Runtime.InteropServices;
  30
  31 namespace System.Windows.Forms.CarbonInternal {
  32         internal class ControlHandler : EventHandlerBase, IEventHandler {
  33                 internal const uint kEventControlInitialize = 1000;
  34                 internal const uint kEventControlDispose = 1001;
  35                 internal const uint kEventControlGetOptimalBounds = 1003;
  36                 internal const uint kEventControlDefInitialize = kEventControlInitialize;
  37                 internal const uint kEventControlDefDispose = kEventControlDispose;
  38                 internal const uint kEventControlHit = 1;
  39                 internal const uint kEventControlSimulateHit = 2;
  40                 internal const uint kEventControlHitTest = 3;
  41                 internal const uint kEventControlDraw = 4;
  42                 internal const uint kEventControlApplyBackground = 5;
  43                 internal const uint kEventControlApplyTextColor = 6;
  44                 internal const uint kEventControlSetFocusPart = 7;
  45                 internal const uint kEventControlGetFocusPart = 8;
  46                 internal const uint kEventControlActivate = 9;
  47                 internal const uint kEventControlDeactivate = 10;
  48                 internal const uint kEventControlSetCursor = 11;
  49                 internal const uint kEventControlContextualMenuClick = 12;
  50                 internal const uint kEventControlClick = 13;
  51                 internal const uint kEventControlGetNextFocusCandidate = 14;
  52                 internal const uint kEventControlGetAutoToggleValue = 15;
  53                 internal const uint kEventControlInterceptSubviewClick = 16;
  54                 internal const uint kEventControlGetClickActivation = 17;
  55                 internal const uint kEventControlDragEnter = 18;
  56                 internal const uint kEventControlDragWithin = 19;
  57                 internal const uint kEventControlDragLeave = 20;
  58                 internal const uint kEventControlDragReceive = 21;
  59                 internal const uint kEventControlInvalidateForSizeChange = 22;
  60                 internal const uint kEventControlTrackingAreaEntered = 23;
  61                 internal const uint kEventControlTrackingAreaExited = 24;
  62                 internal const uint kEventControlTrack = 51;
  63                 internal const uint kEventControlGetScrollToHereStartPoint = 52;
  64                 internal const uint kEventControlGetIndicatorDragConstraint = 53;
  65                 internal const uint kEventControlIndicatorMoved = 54;
  66                 internal const uint kEventControlGhostingFinished = 55;
  67                 internal const uint kEventControlGetActionProcPart = 56;
  68                 internal const uint kEventControlGetPartRegion = 101;
  69                 internal const uint kEventControlGetPartBounds = 102;
  70                 internal const uint kEventControlSetData = 103;
  71                 internal const uint kEventControlGetData = 104;
  72                 internal const uint kEventControlGetSizeConstraints= 105;
  73                 internal const uint kEventControlGetFrameMetrics = 106;
  74                 internal const uint kEventControlValueFieldChanged = 151;
  75                 internal const uint kEventControlAddedSubControl = 152;
  76                 internal const uint kEventControlRemovingSubControl = 153;
  77                 internal const uint kEventControlBoundsChanged = 154;
  78                 internal const uint kEventControlVisibilityChanged = 157;
  79                 internal const uint kEventControlTitleChanged = 158;
  80                 internal const uint kEventControlOwningWindowChanged = 159;
  81                 internal const uint kEventControlHiliteChanged = 160;
  82                 internal const uint kEventControlEnabledStateChanged = 161;
  83                 internal const uint kEventControlLayoutInfoChanged = 162;
  84                 internal const uint kEventControlArbitraryMessage = 201;
  85
  86                 internal const uint kEventParamCGContextRef = 1668183160;
  87                 internal const uint kEventParamDirectObject = 757935405;
  88                 internal const uint kEventParamControlPart = 1668313716;
  89                 internal const uint kEventParamControlLikesDrag = 1668047975;
  90                 internal const uint typeControlRef = 1668575852;
  91                 internal const uint typeCGContextRef = 1668183160;
  92                 internal const uint typeQDPoint = 1363439732;
  93                 internal const uint typeControlPartCode = 1668313716;
  94                 internal const uint typeBoolean = 1651470188;
  95
  96                 internal ControlHandler (XplatUICarbon driver) : base (driver) {}
  97
  98                 public bool ProcessEvent (IntPtr callref, IntPtr eventref, IntPtr handle, uint kind, ref MSG msg) {
  99                         Hwnd hwnd;
 100                         bool client;
 101
 102                         GetEventParameter (eventref, kEventParamDirectObject, typeControlRef, IntPtr.Zero, (uint) Marshal.SizeOf (typeof (IntPtr)), IntPtr.Zero, ref handle);
 103                         hwnd = Hwnd.ObjectFromHandle (handle);
 104
 105                         if (hwnd == null)
 106                                 return false;
 107
 108                         msg.hwnd = hwnd.Handle;
 109                         client = (hwnd.ClientWindow == handle ? true : false);
 110
 111                         switch (kind) {
 112                                 case kEventControlDraw: {
 113                                         //TODO: This is a hack which masks our over-redraw-expose problem
 114                                         if (client) {
 115                                                 HIRect bounds = new HIRect ();
 116                                                 HIViewGetBounds (handle, ref bounds);
 117                                                 Driver.AddExpose (hwnd, client, bounds);
 118                                         }
 119
 120                                         if (!hwnd.visible) {
 121                                                 if (client) {
 122                                                         hwnd.expose_pending = false;
 123                                                 } else {
 124                                                         hwnd.nc_expose_pending = false;
 125                                                 }
 126                                                 return false;
 127                                         }
 128
 129                                         if (client) {
 130                                                 if (!hwnd.expose_pending) {
 131                                                         return false;
 132                                                 }
 133                                                 msg.message = Msg.WM_PAINT;
 134                                         } else {
 135                                                 if (!hwnd.nc_expose_pending) {
 136                                                         return false;
 137                                                 }
 138                                                 //DrawBackground here
 139                                                 DrawBorders (hwnd);
 140                                                 Region region = new Region (hwnd.Invalid);
 141                                                 IntPtr hrgn = region.GetHrgn (null); // Graphics object isn't needed
 142                                                 msg.message = Msg.WM_NCPAINT;
 143                                                 msg.wParam = hrgn == IntPtr.Zero ? (IntPtr)1 : hrgn;
 144                                                 msg.refobject = region;
 145
 146                                         }
 147                                         return true;
 148                                 }
 149                                 case kEventControlVisibilityChanged: {
 150                                         HIRect bounds = new HIRect ();
 151
 152                                         HIViewGetBounds (handle, ref bounds);
 153                                         Driver.AddExpose (hwnd, client, bounds);
 154                                         if (client) {
 155                                                 msg.message = Msg.WM_SHOWWINDOW;
 156                                                 msg.lParam = (IntPtr) 0;
 157                                                 msg.wParam = (HIViewIsVisible (handle) ? (IntPtr)1 : (IntPtr)0);
 158                                                 return true;
 159                                         }
 160                                         return false;
 161                                 }
 162                                 case kEventControlBoundsChanged: {
 163                                         HIRect view_frame = new HIRect ();
 164
 165                                         HIViewGetFrame (handle, ref view_frame);
 166                                         if (!client) {
 167                                                 hwnd.X = (int) view_frame.origin.x;
 168                                                 hwnd.Y = (int) view_frame.origin.y;
 169                                                 hwnd.Width = (int) view_frame.size.width;
 170                                                 hwnd.Height = (int) view_frame.size.height;
 171                                                 Driver.PerformNCCalc (hwnd);
 172                                         }
 173                                         return false;
 174                                 }
 175                                 case kEventControlGetFocusPart: {
 176                                         short pcode = 0;
 177                                         SetEventParameter (eventref, kEventParamControlPart, typeControlPartCode, (uint)Marshal.SizeOf (typeof (short)), ref pcode);
 178                                         return false;
 179                                 }
 180                                 case kEventControlDragEnter:
 181                                 case kEventControlDragWithin:
 182                                 case kEventControlDragLeave:
 183                                 case kEventControlDragReceive:
 184                                         return Dnd.HandleEvent (callref, eventref, handle, kind, ref msg);
 185                         }
 186                         return false;
 187                 }
 188
 189                 private void DrawBackground (Hwnd hwnd, IntPtr eventref, HIRect bounds) {
 190                         if (XplatUICarbon.WindowBackgrounds [hwnd] != null) {
 191                                 IntPtr context = IntPtr.Zero;
 192                                 Color color = (Color) XplatUICarbon.WindowBackgrounds [hwnd];
 193
 194                                 GetEventParameter (eventref, kEventParamCGContextRef, typeCGContextRef, IntPtr.Zero, (uint) Marshal.SizeOf (typeof (IntPtr)), IntPtr.Zero, ref context);
 195
 196                                 CGContextSetRGBFillColor (context, (float) color.R / 255, (float) color.G / 255, (float) color.B / 255, (float) color.A / 255);
 197                                 CGContextFillRect (context, bounds);
 198                         }
 199                 }
 200
 201                 private void DrawBorders (Hwnd hwnd) {
 202                         switch (hwnd.border_style) {
 203                                 case FormBorderStyle.Fixed3D: {
 204                                         Graphics g;
 205
 206                                         g = Graphics.FromHwnd(hwnd.whole_window);
 207                                         if (hwnd.border_static)
 208                                                 ControlPaint.DrawBorder3D(g, new Rectangle(0, 0, hwnd.Width, hwnd.Height), Border3DStyle.SunkenOuter);
 209                                         else
 210                                                 ControlPaint.DrawBorder3D(g, new Rectangle(0, 0, hwnd.Width, hwnd.Height), Border3DStyle.Sunken);
 211                                         g.Dispose();
 212                                         break;
 213                                 }
 214
 215                                 case FormBorderStyle.FixedSingle: {
 216                                         Graphics g;
 217
 218                                         g = Graphics.FromHwnd(hwnd.whole_window);
 219                                         ControlPaint.DrawBorder(g, new Rectangle(0, 0, hwnd.Width, hwnd.Height), Color.Black, ButtonBorderStyle.Solid);
 220                                         g.Dispose();
 221                                         break;
 222                                 }
 223                         }
 224                 }
 225
 226                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 227                 static extern int GetEventParameter (IntPtr eventref, uint name, uint type, IntPtr outtype, uint size, IntPtr outsize, ref IntPtr data);
 228                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 229                 static extern int SetEventParameter (IntPtr eventref, uint name, uint type, uint size, ref short data);
 230
 231                 [DllImport("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 232                 static extern int HIViewGetBounds (IntPtr handle, ref HIRect rect);
 233                 [DllImport("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 234                 static extern int HIViewGetFrame (IntPtr handle, ref HIRect rect);
 235                 [DllImport("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 236                 extern static bool HIViewIsVisible (IntPtr vHnd);
 237
 238                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 239                 static extern int CGContextSetRGBFillColor (IntPtr cgContext, float r, float g, float b, float alpha);
 240                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 241                 static extern int CGContextFillRect (IntPtr context, HIRect rect);
 242         }
 243 }