include/wx/msw/window.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/msw/window.h
   3 // Purpose:     wxWindow class
   4 // Author:      Julian Smart
   5 // Modified by: Vadim Zeitlin on 13.05.99: complete refont of message handling,
   6 //              elimination of Default(), ...
   7 // Created:     01/02/97
   8 // RCS-ID:      $Id$
   9 // Copyright:   (c) Julian Smart
  10 // Licence:     wxWindows licence
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 #ifndef _WX_WINDOW_H_
  14 #define _WX_WINDOW_H_
  15
  16 // ---------------------------------------------------------------------------
  17 // headers
  18 // ---------------------------------------------------------------------------
  19
  20 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  21     #pragma interface "window.h"
  22 #endif
  23
  24 // [at least] some version of Windows send extra mouse move messages after
  25 // a mouse click or a key press - to temporarily fix this problem, set the
  26 // define below to 1
  27 //
  28 // a better solution should be found later...
  29 #define wxUSE_MOUSEEVENT_HACK 0
  30
  31 // ---------------------------------------------------------------------------
  32 // constants
  33 // ---------------------------------------------------------------------------
  34
  35 // FIXME does anybody use those? they're unused by wxWidgets...
  36 enum
  37 {
  38     wxKEY_SHIFT = 1,
  39     wxKEY_CTRL  = 2
  40 };
  41
  42 // ---------------------------------------------------------------------------
  43 // wxWindow declaration for MSW
  44 // ---------------------------------------------------------------------------
  45
  46 class WXDLLEXPORT wxWindowMSW : public wxWindowBase
  47 {
  48 public:
  49     wxWindowMSW() { Init(); }
  50
  51     wxWindowMSW(wxWindow *parent,
  52                 wxWindowID id,
  53                 const wxPoint& pos = wxDefaultPosition,
  54                 const wxSize& size = wxDefaultSize,
  55                 long style = 0,
  56                 const wxString& name = wxPanelNameStr)
  57     {
  58         Init();
  59         Create(parent, id, pos, size, style, name);
  60     }
  61
  62     virtual ~wxWindowMSW();
  63
  64     bool Create(wxWindow *parent,
  65                 wxWindowID id,
  66                 const wxPoint& pos = wxDefaultPosition,
  67                 const wxSize& size = wxDefaultSize,
  68                 long style = 0,
  69                 const wxString& name = wxPanelNameStr);
  70
  71     // implement base class pure virtuals
  72     virtual void SetTitle( const wxString& title);
  73     virtual wxString GetTitle() const;
  74
  75     virtual void Raise();
  76     virtual void Lower();
  77
  78     virtual bool Show( bool show = TRUE );
  79     virtual bool Enable( bool enable = TRUE );
  80
  81     virtual void SetFocus();
  82     virtual void SetFocusFromKbd();
  83
  84     virtual bool Reparent(wxWindowBase *newParent);
  85
  86     virtual void WarpPointer(int x, int y);
  87
  88     virtual void Refresh( bool eraseBackground = TRUE,
  89                           const wxRect *rect = (const wxRect *) NULL );
  90     virtual void Update();
  91     virtual void Freeze();
  92     virtual void Thaw();
  93
  94     virtual void SetWindowStyleFlag( long style );
  95     virtual bool SetCursor( const wxCursor &cursor );
  96     virtual bool SetFont( const wxFont &font );
  97
  98     virtual int GetCharHeight() const;
  99     virtual int GetCharWidth() const;
 100     virtual void GetTextExtent(const wxString& string,
 101                                int *x, int *y,
 102                                int *descent = (int *) NULL,
 103                                int *externalLeading = (int *) NULL,
 104                                const wxFont *theFont = (const wxFont *) NULL)
 105                                const;
 106
 107 #if wxUSE_MENUS_NATIVE
 108     virtual bool DoPopupMenu( wxMenu *menu, int x, int y );
 109 #endif // wxUSE_MENUS_NATIVE
 110
 111     virtual void SetScrollbar( int orient, int pos, int thumbVisible,
 112                                int range, bool refresh = TRUE );
 113     virtual void SetScrollPos( int orient, int pos, bool refresh = TRUE );
 114     virtual int GetScrollPos( int orient ) const;
 115     virtual int GetScrollThumb( int orient ) const;
 116     virtual int GetScrollRange( int orient ) const;
 117     virtual void ScrollWindow( int dx, int dy,
 118                                const wxRect* rect = (wxRect *) NULL );
 119
 120     virtual bool ScrollLines(int lines);
 121     virtual bool ScrollPages(int pages);
 122
 123 #if wxUSE_DRAG_AND_DROP
 124     virtual void SetDropTarget( wxDropTarget *dropTarget );
 125 #endif // wxUSE_DRAG_AND_DROP
 126
 127     // Accept files for dragging
 128     virtual void DragAcceptFiles(bool accept);
 129
 130 #if WXWIN_COMPATIBILITY_2_4
 131     wxDEPRECATED( bool GetUseCtl3D() const );
 132     wxDEPRECATED( bool GetTransparentBackground() const );
 133     wxDEPRECATED( void SetTransparent(bool t = TRUE) );
 134 #endif // WXWIN_COMPATIBILITY_2_4
 135
 136 #ifndef __WXUNIVERSAL__
 137     // Native resource loading (implemented in src/msw/nativdlg.cpp)
 138     // FIXME: should they really be all virtual?
 139     virtual bool LoadNativeDialog(wxWindow* parent, wxWindowID& id);
 140     virtual bool LoadNativeDialog(wxWindow* parent, const wxString& name);
 141     wxWindow* GetWindowChild1(wxWindowID id);
 142     wxWindow* GetWindowChild(wxWindowID id);
 143 #endif // __WXUNIVERSAL__
 144
 145 #if wxUSE_HOTKEY
 146     // install and deinstall a system wide hotkey
 147     virtual bool RegisterHotKey(int hotkeyId, int modifiers, int keycode);
 148     virtual bool UnregisterHotKey(int hotkeyId);
 149 #endif // wxUSE_HOTKEY
 150
 151     // implementation from now on
 152     // --------------------------
 153
 154     // simple accessors
 155     // ----------------
 156
 157     WXHWND GetHWND() const { return m_hWnd; }
 158     void SetHWND(WXHWND hWnd) { m_hWnd = hWnd; }
 159     virtual WXWidget GetHandle() const { return GetHWND(); }
 160
 161     // event handlers
 162     // --------------
 163
 164     void OnEraseBackground(wxEraseEvent& event);
 165     void OnPaint(wxPaintEvent& event);
 166     void OnInitDialog( wxInitDialogEvent& event );
 167
 168 public:
 169     // For implementation purposes - sometimes decorations make the client area
 170     // smaller
 171     virtual wxPoint GetClientAreaOrigin() const;
 172
 173     // Windows subclassing
 174     void SubclassWin(WXHWND hWnd);
 175     void UnsubclassWin();
 176
 177     WXFARPROC MSWGetOldWndProc() const { return m_oldWndProc; }
 178     void MSWSetOldWndProc(WXFARPROC proc) { m_oldWndProc = proc; }
 179
 180     // return TRUE if the window is of a standard (i.e. not wxWidgets') class
 181     //
 182     // to understand why does it work, look at SubclassWin() code and comments
 183     bool IsOfStandardClass() const { return m_oldWndProc != NULL; }
 184
 185     wxWindow *FindItem(long id) const;
 186     wxWindow *FindItemByHWND(WXHWND hWnd, bool controlOnly = FALSE) const;
 187
 188     // MSW only: TRUE if this control is part of the main control
 189     virtual bool ContainsHWND(WXHWND WXUNUSED(hWnd)) const { return FALSE; };
 190
 191     // translate wxWidgets style flags for this control into the Windows style
 192     // and optional extended style for the corresponding native control
 193     //
 194     // this is the function that should be overridden in the derived classes,
 195     // but you will mostly use MSWGetCreateWindowFlags() below
 196     virtual WXDWORD MSWGetStyle(long flags, WXDWORD *exstyle = NULL) const ;
 197
 198     // get the MSW window flags corresponding to wxWidgets ones
 199     //
 200     // the functions returns the flags (WS_XXX) directly and puts the ext
 201     // (WS_EX_XXX) flags into the provided pointer if not NULL
 202     WXDWORD MSWGetCreateWindowFlags(WXDWORD *exflags = NULL) const
 203         { return MSWGetStyle(GetWindowStyle(), exflags); }
 204
 205     // translate wxWidgets coords into Windows ones suitable to be passed to
 206     // ::CreateWindow()
 207     //
 208     // returns TRUE if non default coords are returned, FALSE otherwise
 209     bool MSWGetCreateWindowCoords(const wxPoint& pos,
 210                                   const wxSize& size,
 211                                   int& x, int& y,
 212                                   int& w, int& h) const;
 213
 214     // get the HWND to be used as parent of this window with CreateWindow()
 215     virtual WXHWND MSWGetParent() const;
 216
 217     // creates the window of specified Windows class with given style, extended
 218     // style, title and geometry (default values
 219     //
 220     // returns TRUE if the window has been created, FALSE if creation failed
 221     bool MSWCreate(const wxChar *wclass,
 222                    const wxChar *title = NULL,
 223                    const wxPoint& pos = wxDefaultPosition,
 224                    const wxSize& size = wxDefaultSize,
 225                    WXDWORD style = 0,
 226                    WXDWORD exendedStyle = 0);
 227
 228     virtual bool MSWCommand(WXUINT param, WXWORD id);
 229
 230 #ifndef __WXUNIVERSAL__
 231     // Create an appropriate wxWindow from a HWND
 232     virtual wxWindow* CreateWindowFromHWND(wxWindow* parent, WXHWND hWnd);
 233
 234     // Make sure the window style reflects the HWND style (roughly)
 235     virtual void AdoptAttributesFromHWND();
 236 #endif // __WXUNIVERSAL__
 237
 238     // Setup background and foreground colours correctly
 239     virtual void SetupColours();
 240
 241     // ------------------------------------------------------------------------
 242     // helpers for message handlers: these perform the same function as the
 243     // message crackers from <windowsx.h> - they unpack WPARAM and LPARAM into
 244     // the correct parameters
 245     // ------------------------------------------------------------------------
 246
 247     void UnpackCommand(WXWPARAM wParam, WXLPARAM lParam,
 248                        WXWORD *id, WXHWND *hwnd, WXWORD *cmd);
 249     void UnpackActivate(WXWPARAM wParam, WXLPARAM lParam,
 250                         WXWORD *state, WXWORD *minimized, WXHWND *hwnd);
 251     void UnpackScroll(WXWPARAM wParam, WXLPARAM lParam,
 252                       WXWORD *code, WXWORD *pos, WXHWND *hwnd);
 253     void UnpackCtlColor(WXWPARAM wParam, WXLPARAM lParam,
 254                         WXWORD *nCtlColor, WXHDC *hdc, WXHWND *hwnd);
 255     void UnpackMenuSelect(WXWPARAM wParam, WXLPARAM lParam,
 256                           WXWORD *item, WXWORD *flags, WXHMENU *hmenu);
 257
 258     // ------------------------------------------------------------------------
 259     // internal handlers for MSW messages: all handlers return a boolean value:
 260     // TRUE means that the handler processed the event and FALSE that it didn't
 261     // ------------------------------------------------------------------------
 262
 263     // there are several cases where we have virtual functions for Windows
 264     // message processing: this is because these messages often require to be
 265     // processed in a different manner in the derived classes. For all other
 266     // messages, however, we do *not* have corresponding MSWOnXXX() function
 267     // and if the derived class wants to process them, it should override
 268     // MSWWindowProc() directly.
 269
 270     // scroll event (both horizontal and vertical)
 271     virtual bool MSWOnScroll(int orientation, WXWORD nSBCode,
 272                              WXWORD pos, WXHWND control);
 273
 274     // child control notifications
 275 #ifdef __WIN95__
 276     virtual bool MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result);
 277 #endif // __WIN95__
 278
 279     // owner-drawn controls need to process these messages
 280     virtual bool MSWOnDrawItem(int id, WXDRAWITEMSTRUCT *item);
 281     virtual bool MSWOnMeasureItem(int id, WXMEASUREITEMSTRUCT *item);
 282
 283     // the rest are not virtual
 284     bool HandleCreate(WXLPCREATESTRUCT cs, bool *mayCreate);
 285     bool HandleInitDialog(WXHWND hWndFocus);
 286     bool HandleDestroy();
 287
 288     bool HandlePaint();
 289     bool HandleEraseBkgnd(WXHDC pDC);
 290
 291     bool HandleMinimize();
 292     bool HandleMaximize();
 293     bool HandleSize(int x, int y, WXUINT flag);
 294     bool HandleSizing(wxRect& rect);
 295     bool HandleGetMinMaxInfo(void *mmInfo);
 296
 297     bool HandleShow(bool show, int status);
 298     bool HandleActivate(int flag, bool minimized, WXHWND activate);
 299
 300     bool HandleCommand(WXWORD id, WXWORD cmd, WXHWND control);
 301
 302     bool HandleCtlColor(WXHBRUSH *hBrush,
 303                         WXHDC hdc,
 304                         WXHWND hWnd,
 305                         WXUINT nCtlColor,
 306                         WXUINT message,
 307                         WXWPARAM wParam,
 308                         WXLPARAM lParam);
 309
 310     bool HandlePaletteChanged(WXHWND hWndPalChange);
 311     bool HandleQueryNewPalette();
 312     bool HandleSysColorChange();
 313     bool HandleDisplayChange();
 314     bool HandleCaptureChanged(WXHWND gainedCapture);
 315
 316     bool HandleQueryEndSession(long logOff, bool *mayEnd);
 317     bool HandleEndSession(bool endSession, long logOff);
 318
 319     bool HandleSetFocus(WXHWND wnd);
 320     bool HandleKillFocus(WXHWND wnd);
 321
 322     bool HandleDropFiles(WXWPARAM wParam);
 323
 324     bool HandleMouseEvent(WXUINT msg, int x, int y, WXUINT flags);
 325     bool HandleMouseMove(int x, int y, WXUINT flags);
 326     bool HandleMouseWheel(WXWPARAM wParam, WXLPARAM lParam);
 327
 328     bool HandleChar(WXWPARAM wParam, WXLPARAM lParam, bool isASCII = FALSE);
 329     bool HandleKeyDown(WXWPARAM wParam, WXLPARAM lParam);
 330     bool HandleKeyUp(WXWPARAM wParam, WXLPARAM lParam);
 331 #if wxUSE_ACCEL
 332     bool HandleHotKey(WXWPARAM wParam, WXLPARAM lParam);
 333 #endif
 334 #ifdef __WIN32__
 335     int HandleMenuChar(int chAccel, WXLPARAM lParam);
 336 #endif
 337
 338     bool HandleQueryDragIcon(WXHICON *hIcon);
 339
 340     bool HandleSetCursor(WXHWND hWnd, short nHitTest, int mouseMsg);
 341
 342     // Window procedure
 343     virtual WXLRESULT MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam);
 344
 345     // Calls an appropriate default window procedure
 346     virtual WXLRESULT MSWDefWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam);
 347
 348     // message processing helpers
 349
 350     // return FALSE if the message shouldn't be translated/preprocessed but
 351     // dispatched normally
 352     virtual bool MSWShouldPreProcessMessage(WXMSG* pMsg);
 353
 354     // return TRUE if the message was preprocessed and shouldn't be dispatched
 355     virtual bool MSWProcessMessage(WXMSG* pMsg);
 356
 357     // return TRUE if the message was translated and shouldn't be dispatched
 358     virtual bool MSWTranslateMessage(WXMSG* pMsg);
 359
 360     // called when the window is about to be destroyed
 361     virtual void MSWDestroyWindow();
 362
 363     // this function should return the brush to paint the window background
 364     // with or 0 for the default brush
 365     virtual WXHBRUSH OnCtlColor(WXHDC hDC,
 366                                 WXHWND hWnd,
 367                                 WXUINT nCtlColor,
 368                                 WXUINT message,
 369                                 WXWPARAM wParam,
 370                                 WXLPARAM lParam);
 371
 372     // Responds to colour changes: passes event on to children.
 373     void OnSysColourChanged(wxSysColourChangedEvent& event);
 374
 375     // initialize various fields of wxMouseEvent (common part of MSWOnMouseXXX)
 376     void InitMouseEvent(wxMouseEvent& event, int x, int y, WXUINT flags);
 377
 378     // check if mouse is in the window
 379     bool IsMouseInWindow() const;
 380
 381     // virtual function for implementing internal idle
 382     // behaviour
 383     virtual void OnInternalIdle() ;
 384
 385 protected:
 386     // the window handle
 387     WXHWND                m_hWnd;
 388
 389     // the old window proc (we subclass all windows)
 390     WXFARPROC             m_oldWndProc;
 391
 392     // additional (MSW specific) flags
 393     bool                  m_mouseInWindow:1;
 394     bool                  m_lastKeydownProcessed:1;
 395
 396     // the size of one page for scrolling
 397     int                   m_xThumbSize;
 398     int                   m_yThumbSize;
 399
 400 #if wxUSE_MOUSEEVENT_HACK
 401     // the coordinates of the last mouse event and the type of it
 402     long                  m_lastMouseX,
 403                           m_lastMouseY;
 404     int                   m_lastMouseEvent;
 405 #endif // wxUSE_MOUSEEVENT_HACK
 406
 407     WXHMENU               m_hMenu; // Menu, if any
 408
 409     // implement the base class pure virtuals
 410     virtual void DoClientToScreen( int *x, int *y ) const;
 411     virtual void DoScreenToClient( int *x, int *y ) const;
 412     virtual void DoGetPosition( int *x, int *y ) const;
 413     virtual void DoGetSize( int *width, int *height ) const;
 414     virtual void DoGetClientSize( int *width, int *height ) const;
 415     virtual void DoSetSize(int x, int y,
 416                            int width, int height,
 417                            int sizeFlags = wxSIZE_AUTO);
 418     virtual void DoSetClientSize(int width, int height);
 419
 420     virtual void DoCaptureMouse();
 421     virtual void DoReleaseMouse();
 422
 423     // has the window been frozen by Freeze()?
 424     bool IsFrozen() const { return m_frozenness > 0; }
 425
 426     // move the window to the specified location and resize it: this is called
 427     // from both DoSetSize() and DoSetClientSize() and would usually just call
 428     // ::MoveWindow() except for composite controls which will want to arrange
 429     // themselves inside the given rectangle
 430     virtual void DoMoveWindow(int x, int y, int width, int height);
 431
 432 #if wxUSE_TOOLTIPS
 433     virtual void DoSetToolTip( wxToolTip *tip );
 434
 435     // process TTN_NEEDTEXT message properly (i.e. fixing the bugs in
 436     // comctl32.dll in our code -- see the function body for more info)
 437     bool HandleTooltipNotify(WXUINT code,
 438                              WXLPARAM lParam,
 439                              const wxString& ttip);
 440 #endif // wxUSE_TOOLTIPS
 441
 442     // the helper functions used by HandleChar/KeyXXX methods
 443     wxKeyEvent CreateKeyEvent(wxEventType evType, int id,
 444                               WXLPARAM lParam = 0, WXWPARAM wParam = 0) const;
 445
 446 private:
 447     // common part of all ctors
 448     void Init();
 449
 450     // the (non-virtual) handlers for the events
 451     bool HandleMove(int x, int y);
 452     bool HandleMoving(wxRect& rect);
 453     bool HandleJoystickEvent(WXUINT msg, int x, int y, WXUINT flags);
 454
 455 #ifdef __WIN95__
 456     bool HandleNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result);
 457 #endif // __WIN95__
 458
 459     // list of disabled children before last call to our Disable()
 460     wxWindowList *m_childrenDisabled;
 461
 462     // number of calls to Freeze() minus number of calls to Thaw()
 463     unsigned int m_frozenness;
 464
 465     DECLARE_DYNAMIC_CLASS(wxWindowMSW)
 466     DECLARE_NO_COPY_CLASS(wxWindowMSW)
 467     DECLARE_EVENT_TABLE()
 468 };
 469
 470 // ----------------------------------------------------------------------------
 471 // inline functions
 472 // ----------------------------------------------------------------------------
 473
 474 #if WXWIN_COMPATIBILITY_2_4
 475
 476 inline bool wxWindowMSW::GetUseCtl3D() const { return false; }
 477 inline bool wxWindowMSW::GetTransparentBackground() const { return false; }
 478 inline void wxWindowMSW::SetTransparent(bool WXUNUSED(t)) { }
 479
 480 #endif // WXWIN_COMPATIBILITY_2_4
 481
 482 // ---------------------------------------------------------------------------
 483 // global functions
 484 // ---------------------------------------------------------------------------
 485
 486 // kbd code translation
 487 WXDLLEXPORT int wxCharCodeMSWToWX(int keySym, WXLPARAM lParam = 0);
 488 WXDLLEXPORT int wxCharCodeWXToMSW(int id, bool *IsVirtual);
 489
 490 // window creation helper class: before creating a new HWND, instantiate an
 491 // object of this class on stack - this allows to process the messages sent to
 492 // the window even before CreateWindow() returns
 493 class wxWindowCreationHook
 494 {
 495 public:
 496     wxWindowCreationHook(wxWindowMSW *winBeingCreated);
 497     ~wxWindowCreationHook();
 498 };
 499
 500 // ----------------------------------------------------------------------------
 501 // global objects
 502 // ----------------------------------------------------------------------------
 503
 504 // notice that this hash must be defined after wxWindow declaration as it
 505 // needs to "see" its dtor and not just forward declaration
 506 #include "wx/hash.h"
 507
 508 // pseudo-template HWND <-> wxWindow hash table
 509 #if WXWIN_COMPATIBILITY_2_4
 510 WX_DECLARE_HASH(wxWindow, wxWindowList, wxWinHashTable);
 511 #else
 512 WX_DECLARE_HASH(wxWindowMSW, wxWindowList, wxWinHashTable);
 513 #endif
 514
 515 extern wxWinHashTable *wxWinHandleHash;
 516
 517 #endif
 518     // _WX_WINDOW_H_