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 wxWindows...
  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
 167 public:
 168     // For implementation purposes - sometimes decorations make the client area
 169     // smaller
 170     virtual wxPoint GetClientAreaOrigin() const;
 171
 172     // Windows subclassing
 173     void SubclassWin(WXHWND hWnd);
 174     void UnsubclassWin();
 175
 176     WXFARPROC MSWGetOldWndProc() const { return m_oldWndProc; }
 177     void MSWSetOldWndProc(WXFARPROC proc) { m_oldWndProc = proc; }
 178
 179     // return TRUE if the window is of a standard (i.e. not wxWindows') class
 180     //
 181     // to understand why does it work, look at SubclassWin() code and comments
 182     bool IsOfStandardClass() const { return m_oldWndProc != NULL; }
 183
 184     wxWindow *FindItem(long id) const;
 185     wxWindow *FindItemByHWND(WXHWND hWnd, bool controlOnly = FALSE) const;
 186
 187     // MSW only: TRUE if this control is part of the main control
 188     virtual bool ContainsHWND(WXHWND WXUNUSED(hWnd)) const { return FALSE; };
 189
 190     // translate wxWindows style flags for this control into the Windows style
 191     // and optional extended style for the corresponding native control
 192     //
 193     // this is the function that should be overridden in the derived classes,
 194     // but you will mostly use MSWGetCreateWindowFlags() below
 195     virtual WXDWORD MSWGetStyle(long flags, WXDWORD *exstyle = NULL) const ;
 196
 197     // get the MSW window flags corresponding to wxWindows ones
 198     //
 199     // the functions returns the flags (WS_XXX) directly and puts the ext
 200     // (WS_EX_XXX) flags into the provided pointer if not NULL
 201     WXDWORD MSWGetCreateWindowFlags(WXDWORD *exflags = NULL) const
 202         { return MSWGetStyle(GetWindowStyle(), exflags); }
 203
 204     // translate wxWindows coords into Windows ones suitable to be passed to
 205     // ::CreateWindow()
 206     //
 207     // returns TRUE if non default coords are returned, FALSE otherwise
 208     bool MSWGetCreateWindowCoords(const wxPoint& pos,
 209                                   const wxSize& size,
 210                                   int& x, int& y,
 211                                   int& w, int& h) const;
 212
 213     // get the HWND to be used as parent of this window with CreateWindow()
 214     virtual WXHWND MSWGetParent() const;
 215
 216     // creates the window of specified Windows class with given style, extended
 217     // style, title and geometry (default values
 218     //
 219     // returns TRUE if the window has been created, FALSE if creation failed
 220     bool MSWCreate(const wxChar *wclass,
 221                    const wxChar *title = NULL,
 222                    const wxPoint& pos = wxDefaultPosition,
 223                    const wxSize& size = wxDefaultSize,
 224                    WXDWORD style = 0,
 225                    WXDWORD exendedStyle = 0);
 226
 227     virtual bool MSWCommand(WXUINT param, WXWORD id);
 228
 229 #ifndef __WXUNIVERSAL__
 230     // Create an appropriate wxWindow from a HWND
 231     virtual wxWindow* CreateWindowFromHWND(wxWindow* parent, WXHWND hWnd);
 232
 233     // Make sure the window style reflects the HWND style (roughly)
 234     virtual void AdoptAttributesFromHWND();
 235 #endif // __WXUNIVERSAL__
 236
 237     // Setup background and foreground colours correctly
 238     virtual void SetupColours();
 239
 240     // ------------------------------------------------------------------------
 241     // helpers for message handlers: these perform the same function as the
 242     // message crackers from <windowsx.h> - they unpack WPARAM and LPARAM into
 243     // the correct parameters
 244     // ------------------------------------------------------------------------
 245
 246     void UnpackCommand(WXWPARAM wParam, WXLPARAM lParam,
 247                        WXWORD *id, WXHWND *hwnd, WXWORD *cmd);
 248     void UnpackActivate(WXWPARAM wParam, WXLPARAM lParam,
 249                         WXWORD *state, WXWORD *minimized, WXHWND *hwnd);
 250     void UnpackScroll(WXWPARAM wParam, WXLPARAM lParam,
 251                       WXWORD *code, WXWORD *pos, WXHWND *hwnd);
 252     void UnpackCtlColor(WXWPARAM wParam, WXLPARAM lParam,
 253                         WXWORD *nCtlColor, WXHDC *hdc, WXHWND *hwnd);
 254     void UnpackMenuSelect(WXWPARAM wParam, WXLPARAM lParam,
 255                           WXWORD *item, WXWORD *flags, WXHMENU *hmenu);
 256
 257     // ------------------------------------------------------------------------
 258     // internal handlers for MSW messages: all handlers return a boolean value:
 259     // TRUE means that the handler processed the event and FALSE that it didn't
 260     // ------------------------------------------------------------------------
 261
 262     // there are several cases where we have virtual functions for Windows
 263     // message processing: this is because these messages often require to be
 264     // processed in a different manner in the derived classes. For all other
 265     // messages, however, we do *not* have corresponding MSWOnXXX() function
 266     // and if the derived class wants to process them, it should override
 267     // MSWWindowProc() directly.
 268
 269     // scroll event (both horizontal and vertical)
 270     virtual bool MSWOnScroll(int orientation, WXWORD nSBCode,
 271                              WXWORD pos, WXHWND control);
 272
 273     // child control notifications
 274 #ifdef __WIN95__
 275     virtual bool MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result);
 276 #endif // __WIN95__
 277
 278     // owner-drawn controls need to process these messages
 279     virtual bool MSWOnDrawItem(int id, WXDRAWITEMSTRUCT *item);
 280     virtual bool MSWOnMeasureItem(int id, WXMEASUREITEMSTRUCT *item);
 281
 282     // the rest are not virtual
 283     bool HandleCreate(WXLPCREATESTRUCT cs, bool *mayCreate);
 284     bool HandleInitDialog(WXHWND hWndFocus);
 285     bool HandleDestroy();
 286
 287     bool HandlePaint();
 288     bool HandleEraseBkgnd(WXHDC pDC);
 289
 290     bool HandleMinimize();
 291     bool HandleMaximize();
 292     bool HandleSize(int x, int y, WXUINT flag);
 293     bool HandleSizing(wxRect& rect);
 294     bool HandleGetMinMaxInfo(void *mmInfo);
 295
 296     bool HandleShow(bool show, int status);
 297     bool HandleActivate(int flag, bool minimized, WXHWND activate);
 298
 299     bool HandleCommand(WXWORD id, WXWORD cmd, WXHWND control);
 300     bool HandleSysCommand(WXWPARAM wParam, WXLPARAM lParam);
 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     // move the window to the specified location and resize it: this is called
 424     // from both DoSetSize() and DoSetClientSize() and would usually just call
 425     // ::MoveWindow() except for composite controls which will want to arrange
 426     // themselves inside the given rectangle
 427     virtual void DoMoveWindow(int x, int y, int width, int height);
 428
 429 #if wxUSE_TOOLTIPS
 430     virtual void DoSetToolTip( wxToolTip *tip );
 431
 432     // process TTN_NEEDTEXT message properly (i.e. fixing the bugs in
 433     // comctl32.dll in our code -- see the function body for more info)
 434     bool HandleTooltipNotify(WXUINT code,
 435                              WXLPARAM lParam,
 436                              const wxString& ttip);
 437 #endif // wxUSE_TOOLTIPS
 438
 439     // the helper functions used by HandleChar/KeyXXX methods
 440     wxKeyEvent CreateKeyEvent(wxEventType evType, int id,
 441                               WXLPARAM lParam = 0, WXWPARAM wParam = 0) const;
 442
 443 private:
 444     // common part of all ctors
 445     void Init();
 446
 447     // the (non-virtual) handlers for the events
 448     bool HandleMove(int x, int y);
 449     bool HandleMoving(wxRect& rect);
 450     bool HandleJoystickEvent(WXUINT msg, int x, int y, WXUINT flags);
 451
 452 #ifdef __WIN95__
 453     bool HandleNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result);
 454 #endif // __WIN95__
 455
 456     // list of disabled children before last call to our Disable()
 457     wxWindowList *m_childrenDisabled;
 458
 459     // number of calls to Freeze() minus number of calls to Thaw()
 460     unsigned int m_frozenness;
 461
 462     DECLARE_DYNAMIC_CLASS(wxWindowMSW)
 463     DECLARE_NO_COPY_CLASS(wxWindowMSW)
 464     DECLARE_EVENT_TABLE()
 465 };
 466
 467 // ----------------------------------------------------------------------------
 468 // inline functions
 469 // ----------------------------------------------------------------------------
 470
 471 #if WXWIN_COMPATIBILITY_2_4
 472
 473 inline bool wxWindowMSW::GetUseCtl3D() const { return false; }
 474 inline bool wxWindowMSW::GetTransparentBackground() const { return false; }
 475 inline void wxWindowMSW::SetTransparent(bool WXUNUSED(t)) { }
 476
 477 #endif // WXWIN_COMPATIBILITY_2_4
 478
 479 // ---------------------------------------------------------------------------
 480 // global functions
 481 // ---------------------------------------------------------------------------
 482
 483 // kbd code translation
 484 WXDLLEXPORT int wxCharCodeMSWToWX(int keySym, WXLPARAM lParam = 0);
 485 WXDLLEXPORT int wxCharCodeWXToMSW(int id, bool *IsVirtual);
 486
 487 // window creation helper class: before creating a new HWND, instantiate an
 488 // object of this class on stack - this allows to process the messages sent to
 489 // the window even before CreateWindow() returns
 490 class wxWindowCreationHook
 491 {
 492 public:
 493     wxWindowCreationHook(wxWindowMSW *winBeingCreated);
 494     ~wxWindowCreationHook();
 495 };
 496
 497 // ----------------------------------------------------------------------------
 498 // global objects
 499 // ----------------------------------------------------------------------------
 500
 501 // notice that this hash must be defined after wxWindow declaration as it
 502 // needs to "see" its dtor and not just forward declaration
 503 #include "wx/hash.h"
 504
 505 // pseudo-template HWND <-> wxWindow hash table
 506 WX_DECLARE_HASH(wxWindow, wxWindowList, wxWinHashTable);
 507
 508 extern wxWinHashTable *wxWinHandleHash;
 509
 510 #endif
 511     // _WX_WINDOW_H_