src/msw/spinctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/spinctrl.cpp
   3 // Purpose:     wxSpinCtrl class implementation for Win32
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     22.07.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Vadim Zeitlin
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 #ifdef __GNUG__
  17     #pragma implementation "spinctrlbase.h"
  18     #pragma implementation "spinctrl.h"
  19 #endif
  20
  21 // ----------------------------------------------------------------------------
  22 // headers
  23 // ----------------------------------------------------------------------------
  24
  25 // for compilers that support precompilation, includes "wx.h".
  26 #include "wx/wxprec.h"
  27
  28 #ifdef __BORLANDC__
  29     #pragma hdrstop
  30 #endif
  31
  32 #ifndef WX_PRECOMP
  33     #include "wx/wx.h"
  34 #endif
  35
  36 #if wxUSE_SPINCTRL
  37
  38 #if defined(__WIN95__)
  39
  40 #include "wx/spinctrl.h"
  41 #include "wx/msw/private.h"
  42
  43 #if defined(__WIN95__) && !(defined(__GNUWIN32_OLD__) || defined(__TWIN32__))
  44     #include <commctrl.h>
  45 #endif
  46
  47 #include <limits.h>         // for INT_MIN
  48
  49 // ----------------------------------------------------------------------------
  50 // macros
  51 // ----------------------------------------------------------------------------
  52
  53 IMPLEMENT_DYNAMIC_CLASS(wxSpinCtrl, wxControl)
  54
  55 BEGIN_EVENT_TABLE(wxSpinCtrl, wxSpinButton)
  56     EVT_CHAR(wxSpinCtrl::OnChar)
  57     EVT_SPIN(-1, wxSpinCtrl::OnSpinChange)
  58 END_EVENT_TABLE()
  59
  60 #define GetBuddyHwnd()      (HWND)(m_hwndBuddy)
  61
  62 // ----------------------------------------------------------------------------
  63 // constants
  64 // ----------------------------------------------------------------------------
  65
  66 // the margin between the up-down control and its buddy (can be arbitrary,
  67 // choose what you like - or may be decide during run-time depending on the
  68 // font size?)
  69 static const int MARGIN_BETWEEN = 1;
  70
  71 // ============================================================================
  72 // implementation
  73 // ============================================================================
  74
  75 wxArraySpins wxSpinCtrl::ms_allSpins;
  76
  77 // ----------------------------------------------------------------------------
  78 // wnd proc for the buddy text ctrl
  79 // ----------------------------------------------------------------------------
  80
  81 LRESULT APIENTRY _EXPORT wxBuddyTextWndProc(HWND hwnd,
  82                                             UINT message,
  83                                             WPARAM wParam,
  84                                             LPARAM lParam)
  85 {
  86     wxSpinCtrl *spin = (wxSpinCtrl *)::GetWindowLong(hwnd, GWL_USERDATA);
  87
  88     // forward some messages (the key ones only so far) to the spin ctrl
  89     switch ( message )
  90     {
  91         case WM_CHAR:
  92         case WM_DEADCHAR:
  93         case WM_KEYUP:
  94         case WM_KEYDOWN:
  95             spin->MSWWindowProc(message, wParam, lParam);
  96
  97             // The control may have been deleted at this point, so check.
  98             if (!(::IsWindow(hwnd) && ((wxSpinCtrl *)::GetWindowLong(hwnd, GWL_USERDATA)) == spin))
  99                 return 0;
 100             break;
 101
 102         case WM_GETDLGCODE:
 103             // we want to get WXK_RETURN in order to generate the event for it
 104             return DLGC_WANTCHARS;
 105     }
 106
 107     return ::CallWindowProc(CASTWNDPROC spin->GetBuddyWndProc(),
 108                             hwnd, message, wParam, lParam);
 109 }
 110
 111 /* static */
 112 wxSpinCtrl *wxSpinCtrl::GetSpinForTextCtrl(WXHWND hwndBuddy)
 113 {
 114     wxSpinCtrl *spin = (wxSpinCtrl *)::GetWindowLong((HWND)hwndBuddy,
 115                                                      GWL_USERDATA);
 116
 117     int i = ms_allSpins.Index(spin);
 118
 119     if ( i == wxNOT_FOUND )
 120         return NULL;
 121
 122     // sanity check
 123     wxASSERT_MSG( spin->m_hwndBuddy == hwndBuddy,
 124                   _T("wxSpinCtrl has incorrect buddy HWND!") );
 125
 126     return spin;
 127 }
 128
 129 // process a WM_COMMAND generated by the buddy text control
 130 bool wxSpinCtrl::ProcessTextCommand(WXWORD cmd, WXWORD WXUNUSED(id))
 131 {
 132     switch (cmd)
 133     {
 134     case EN_CHANGE:
 135         {
 136             wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId());
 137             event.SetEventObject(this);
 138             wxString val = wxGetWindowText(m_hwndBuddy);
 139             event.SetString(val);
 140             event.SetInt(GetValue());
 141             return GetEventHandler()->ProcessEvent(event);
 142         }
 143     case EN_SETFOCUS:
 144     case EN_KILLFOCUS:
 145         {
 146             wxFocusEvent event(cmd == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
 147                     : wxEVT_SET_FOCUS,
 148                     m_windowId);
 149             event.SetEventObject( this );
 150             return GetEventHandler()->ProcessEvent(event);
 151         }
 152      default:
 153         break;
 154     }
 155
 156     // not processed
 157     return FALSE;
 158 }
 159
 160 void wxSpinCtrl::OnChar(wxKeyEvent& event)
 161 {
 162     switch ( event.KeyCode() )
 163     {
 164         case WXK_RETURN:
 165             {
 166                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 167                 InitCommandEvent(event);
 168                 wxString val = wxGetWindowText(m_hwndBuddy);
 169                 event.SetString(val);
 170                 event.SetInt(GetValue());
 171                 if ( GetEventHandler()->ProcessEvent(event) )
 172                     return;
 173                 break;
 174             }
 175
 176         case WXK_TAB:
 177             // always produce navigation event - even if we process TAB
 178             // ourselves the fact that we got here means that the user code
 179             // decided to skip processing of this TAB - probably to let it
 180             // do its default job.
 181             {
 182                 wxNavigationKeyEvent eventNav;
 183                 eventNav.SetDirection(!event.ShiftDown());
 184                 eventNav.SetWindowChange(event.ControlDown());
 185                 eventNav.SetEventObject(this);
 186
 187                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
 188                     return;
 189             }
 190             break;
 191     }
 192
 193     // no, we didn't process it
 194     event.Skip();
 195 }
 196
 197 // ----------------------------------------------------------------------------
 198 // construction
 199 // ----------------------------------------------------------------------------
 200
 201 bool wxSpinCtrl::Create(wxWindow *parent,
 202                         wxWindowID id,
 203                         const wxString& value,
 204                         const wxPoint& pos,
 205                         const wxSize& size,
 206                         long style,
 207                         int min, int max, int initial,
 208                         const wxString& name)
 209 {
 210     // before using DoGetBestSize(), have to set style to let the base class
 211     // know whether this is a horizontal or vertical control (we're always
 212     // vertical)
 213     style |= wxSP_VERTICAL;
 214     SetWindowStyle(style);
 215
 216     // calculate the sizes: the size given is the toal size for both controls
 217     // and we need to fit them both in the given width (height is the same)
 218     wxSize sizeText(size), sizeBtn(size);
 219     sizeBtn.x = wxSpinButton::DoGetBestSize().x;
 220     if ( sizeText.x <= 0 )
 221     {
 222         // DEFAULT_ITEM_WIDTH is the default width for the text control
 223         sizeText.x = DEFAULT_ITEM_WIDTH + MARGIN_BETWEEN + sizeBtn.x;
 224     }
 225
 226     sizeText.x -= sizeBtn.x + MARGIN_BETWEEN;
 227     if ( sizeText.x <= 0 )
 228     {
 229         wxLogDebug(_T("not enough space for wxSpinCtrl!"));
 230     }
 231
 232     wxPoint posBtn(pos);
 233     posBtn.x += sizeText.x + MARGIN_BETWEEN;
 234
 235     // create the spin button
 236     if ( !wxSpinButton::Create(parent, id, posBtn, sizeBtn, style, name) )
 237     {
 238         return FALSE;
 239     }
 240
 241     SetRange(min, max);
 242     SetValue(initial);
 243
 244     bool want3D;
 245     WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D);
 246     int msStyle = WS_CHILD;
 247
 248     // Even with extended styles, need to combine with WS_BORDER for them to
 249     // look right.
 250     if ( want3D || wxStyleHasBorder(style) )
 251         msStyle |= WS_BORDER;
 252
 253     if ( style & wxCLIP_SIBLINGS )
 254         msStyle |= WS_CLIPSIBLINGS;
 255
 256     // create the text window
 257     m_hwndBuddy = (WXHWND)::CreateWindowEx
 258                     (
 259                      exStyle,       // sunken border
 260                      _T("EDIT"),             // window class
 261                      NULL,                   // no window title
 262                      msStyle /* | WS_CLIPSIBLINGS */,   // style (will be shown later)
 263                      pos.x, pos.y,           // position
 264                      0, 0,                   // size (will be set later)
 265                      GetHwndOf(parent),      // parent
 266                      (HMENU)-1,              // control id
 267                      wxGetInstance(),        // app instance
 268                      NULL                    // unused client data
 269                     );
 270
 271     if ( !m_hwndBuddy )
 272     {
 273         wxLogLastError(wxT("CreateWindow(buddy text window)"));
 274
 275         return FALSE;
 276     }
 277
 278     // subclass the text ctrl to be able to intercept some events
 279     m_wndProcBuddy = (WXFARPROC)::GetWindowLong(GetBuddyHwnd(), GWL_WNDPROC);
 280     ::SetWindowLong(GetBuddyHwnd(), GWL_USERDATA, (LONG)this);
 281     ::SetWindowLong(GetBuddyHwnd(), GWL_WNDPROC, (LONG)wxBuddyTextWndProc);
 282
 283     // should have the same font as the other controls
 284     SetFont(GetParent()->GetFont());
 285
 286     // set the size of the text window - can do it only now, because we
 287     // couldn't call DoGetBestSize() before as font wasn't set
 288     if ( sizeText.y <= 0 )
 289     {
 290         int cx, cy;
 291         wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
 292
 293         sizeText.y = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
 294     }
 295
 296     DoMoveWindow(pos.x, pos.y,
 297                  sizeText.x + sizeBtn.x + MARGIN_BETWEEN, sizeText.y);
 298
 299     (void)::ShowWindow(GetBuddyHwnd(), SW_SHOW);
 300
 301     // associate the text window with the spin button
 302     (void)::SendMessage(GetHwnd(), UDM_SETBUDDY, (WPARAM)m_hwndBuddy, 0);
 303
 304     if ( !value.IsEmpty() )
 305     {
 306         SetValue(value);
 307     }
 308
 309     // do it after finishing with m_hwndBuddy creation to avoid generating
 310     // initial wxEVT_COMMAND_TEXT_UPDATED message
 311     ms_allSpins.Add(this);
 312
 313     return TRUE;
 314 }
 315
 316 wxSpinCtrl::~wxSpinCtrl()
 317 {
 318     ms_allSpins.Remove(this);
 319
 320     // destroy the buddy window because this pointer which wxBuddyTextWndProc
 321     // uses will not soon be valid any more
 322     ::DestroyWindow(GetBuddyHwnd());
 323 }
 324
 325 // ----------------------------------------------------------------------------
 326 // wxTextCtrl-like methods
 327 // ----------------------------------------------------------------------------
 328
 329 void wxSpinCtrl::SetValue(const wxString& text)
 330 {
 331     if ( !::SetWindowText(GetBuddyHwnd(), text.c_str()) )
 332     {
 333         wxLogLastError(wxT("SetWindowText(buddy)"));
 334     }
 335 }
 336
 337 int wxSpinCtrl::GetValue() const
 338 {
 339     wxString val = wxGetWindowText(m_hwndBuddy);
 340
 341     long n;
 342     if ( (wxSscanf(val, wxT("%lu"), &n) != 1) )
 343         n = INT_MIN;
 344
 345     return n;
 346 }
 347
 348 // ----------------------------------------------------------------------------
 349 // forward some methods to subcontrols
 350 // ----------------------------------------------------------------------------
 351
 352 bool wxSpinCtrl::SetFont(const wxFont& font)
 353 {
 354     if ( !wxWindowBase::SetFont(font) )
 355     {
 356         // nothing to do
 357         return FALSE;
 358     }
 359
 360     WXHANDLE hFont = GetFont().GetResourceHandle();
 361     (void)::SendMessage(GetBuddyHwnd(), WM_SETFONT, (WPARAM)hFont, TRUE);
 362
 363     return TRUE;
 364 }
 365
 366 bool wxSpinCtrl::Show(bool show)
 367 {
 368     if ( !wxControl::Show(show) )
 369     {
 370         return FALSE;
 371     }
 372
 373     ::ShowWindow(GetBuddyHwnd(), show ? SW_SHOW : SW_HIDE);
 374
 375     return TRUE;
 376 }
 377
 378 bool wxSpinCtrl::Enable(bool enable)
 379 {
 380     if ( !wxControl::Enable(enable) )
 381     {
 382         return FALSE;
 383     }
 384
 385     ::EnableWindow(GetBuddyHwnd(), enable);
 386
 387     return TRUE;
 388 }
 389
 390 void wxSpinCtrl::SetFocus()
 391 {
 392     ::SetFocus(GetBuddyHwnd());
 393 }
 394
 395 // ----------------------------------------------------------------------------
 396 // event processing
 397 // ----------------------------------------------------------------------------
 398
 399 void wxSpinCtrl::OnSpinChange(wxSpinEvent& eventSpin)
 400 {
 401     wxCommandEvent event(wxEVT_COMMAND_SPINCTRL_UPDATED, GetId());
 402     event.SetEventObject(this);
 403     event.SetInt(eventSpin.GetPosition());
 404
 405     (void)GetEventHandler()->ProcessEvent(event);
 406
 407     if ( eventSpin.GetSkipped() )
 408     {
 409         event.Skip();
 410     }
 411 }
 412
 413 // ----------------------------------------------------------------------------
 414 // size calculations
 415 // ----------------------------------------------------------------------------
 416
 417 wxSize wxSpinCtrl::DoGetBestSize() const
 418 {
 419     wxSize sizeBtn = wxSpinButton::DoGetBestSize();
 420     sizeBtn.x += DEFAULT_ITEM_WIDTH + MARGIN_BETWEEN;
 421
 422     int y;
 423     wxGetCharSize(GetHWND(), NULL, &y, &GetFont());
 424     y = EDIT_HEIGHT_FROM_CHAR_HEIGHT(y);
 425
 426     if ( sizeBtn.y < y )
 427     {
 428         // make the text tall enough
 429         sizeBtn.y = y;
 430     }
 431
 432     return sizeBtn;
 433 }
 434
 435 void wxSpinCtrl::DoMoveWindow(int x, int y, int width, int height)
 436 {
 437     int widthBtn = wxSpinButton::DoGetBestSize().x;
 438     int widthText = width - widthBtn - MARGIN_BETWEEN;
 439     if ( widthText <= 0 )
 440     {
 441         wxLogDebug(_T("not enough space for wxSpinCtrl!"));
 442     }
 443
 444     if ( !::MoveWindow(GetBuddyHwnd(), x, y, widthText, height, TRUE) )
 445     {
 446         wxLogLastError(wxT("MoveWindow(buddy)"));
 447     }
 448
 449     x += widthText + MARGIN_BETWEEN;
 450     if ( !::MoveWindow(GetHwnd(), x, y, widthBtn, height, TRUE) )
 451     {
 452         wxLogLastError(wxT("MoveWindow"));
 453     }
 454 }
 455
 456 // get total size of the control
 457 void wxSpinCtrl::DoGetSize(int *x, int *y) const
 458 {
 459     RECT spinrect, textrect, ctrlrect;
 460     GetWindowRect(GetHwnd(), &spinrect);
 461     GetWindowRect(GetBuddyHwnd(), &textrect);
 462     UnionRect(&ctrlrect,&textrect, &spinrect);
 463
 464     if ( x )
 465         *x = ctrlrect.right - ctrlrect.left;
 466     if ( y )
 467         *y = ctrlrect.bottom - ctrlrect.top;
 468 }
 469
 470 void wxSpinCtrl::DoGetPosition(int *x, int *y) const
 471 {
 472     // hack: pretend that our HWND is the text control just for a moment
 473     WXHWND hWnd = GetHWND();
 474     wxConstCast(this, wxSpinCtrl)->m_hWnd = m_hwndBuddy;
 475
 476     wxSpinButton::DoGetPosition(x, y);
 477
 478     wxConstCast(this, wxSpinCtrl)->m_hWnd = hWnd;
 479 }
 480
 481 #endif // __WIN95__
 482
 483 #endif
 484        // wxUSE_SPINCTRL
 485