src/msw/control.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        control.cpp
   3 // Purpose:     wxControl class
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "control.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #include "wx/event.h"
  25 #include "wx/app.h"
  26 #include "wx/dcclient.h"
  27 #endif
  28
  29 #include "wx/control.h"
  30
  31 #include "wx/msw/private.h"
  32
  33 #if (defined(__WIN95__) && !defined(__GNUWIN32__)) || defined(__TWIN32__) || defined(wxUSE_NORLANDER_HEADERS)
  34 #include <commctrl.h>
  35 #endif
  36
  37 IMPLEMENT_ABSTRACT_CLASS(wxControl, wxWindow)
  38
  39 BEGIN_EVENT_TABLE(wxControl, wxWindow)
  40     EVT_ERASE_BACKGROUND(wxControl::OnEraseBackground)
  41 END_EVENT_TABLE()
  42
  43 // Item members
  44 wxControl::wxControl()
  45 {
  46     m_backgroundColour = *wxWHITE;
  47     m_foregroundColour = *wxBLACK;
  48
  49 #if WXWIN_COMPATIBILITY
  50     m_callback = 0;
  51 #endif // WXWIN_COMPATIBILITY
  52 }
  53
  54 wxControl::~wxControl()
  55 {
  56     m_isBeingDeleted = TRUE;
  57 }
  58
  59
  60 bool wxControl::Create(wxWindow *parent, wxWindowID id,
  61                        const wxPoint& pos,
  62                        const wxSize& size, long style,
  63 #if wxUSE_VALIDATORS
  64                        const wxValidator& validator,
  65 #endif
  66                        const wxString& name)
  67 {
  68     bool rval = wxWindow::Create(parent, id, pos, size, style, name);
  69     if (rval) {
  70 #if wxUSE_VALIDATORS
  71         SetValidator(validator);
  72 #endif
  73     }
  74     return rval;
  75 }
  76
  77 bool wxControl::MSWCreateControl(const wxChar *classname,
  78                                  WXDWORD style,
  79                                  const wxPoint& pos,
  80                                  const wxSize& size,
  81                                  const wxString& label,
  82                                  WXDWORD exstyle)
  83 {
  84     // VZ: if someone could put a comment here explaining what exactly this is
  85     //     needed for, it would be nice...
  86     bool want3D;
  87
  88     // if no extended style given, determine it ourselves
  89     if ( exstyle == (WXDWORD)-1 )
  90     {
  91         exstyle = GetExStyle(style, &want3D);
  92     }
  93
  94     // all controls have these childs (wxWindows creates all controls visible
  95     // by default)
  96     style |= WS_CHILD | WS_VISIBLE;
  97
  98     m_hWnd = (WXHWND)::CreateWindowEx
  99                        (
 100                         exstyle,            // extended style
 101                         classname,          // the kind of control to create
 102                         label,              // the window name
 103                         style,              // the window style
 104                         pos.x, pos.y,       // the window position
 105                         size.x, size.y,     //            and size
 106                         GetHwndOf(GetParent()),  // parent
 107                         (HMENU)GetId(),     // child id
 108                         wxGetInstance(),    // app instance
 109                         NULL                // creation parameters
 110                        );
 111
 112     if ( !m_hWnd )
 113     {
 114 #ifdef __WXDEBUG__
 115         wxLogError(wxT("Failed to create a control of class '%s'"), classname);
 116 #endif // DEBUG
 117
 118         return FALSE;
 119     }
 120
 121 #if wxUSE_CTL3D
 122     if ( want3D )
 123     {
 124         Ctl3dSubclassCtl(GetHwnd());
 125         m_useCtl3D = TRUE;
 126     }
 127 #endif // wxUSE_CTL3D
 128
 129     // subclass again for purposes of dialog editing mode
 130     SubclassWin(m_hWnd);
 131
 132     // controls use the same font and colours as their parent dialog by default
 133     InheritAttributes();
 134
 135     return TRUE;
 136 }
 137
 138 wxSize wxControl::DoGetBestSize() const
 139 {
 140     return wxSize(DEFAULT_ITEM_WIDTH, DEFAULT_ITEM_HEIGHT);
 141 }
 142
 143 bool wxControl::ProcessCommand(wxCommandEvent& event)
 144 {
 145 #if WXWIN_COMPATIBILITY
 146     if ( m_callback )
 147     {
 148         (void)(*m_callback)(this, event);
 149
 150         return TRUE;
 151     }
 152     else
 153 #endif // WXWIN_COMPATIBILITY
 154
 155     return GetEventHandler()->ProcessEvent(event);
 156 }
 157
 158 #ifdef __WIN95__
 159 bool wxControl::MSWOnNotify(int idCtrl,
 160                             WXLPARAM lParam,
 161                             WXLPARAM* result)
 162 {
 163     wxCommandEvent event(wxEVT_NULL, m_windowId);
 164     wxEventType eventType = wxEVT_NULL;
 165     NMHDR *hdr1 = (NMHDR*) lParam;
 166     switch ( hdr1->code )
 167     {
 168         case NM_CLICK:
 169             eventType = wxEVT_COMMAND_LEFT_CLICK;
 170             break;
 171
 172         case NM_DBLCLK:
 173             eventType = wxEVT_COMMAND_LEFT_DCLICK;
 174             break;
 175
 176         case NM_RCLICK:
 177             eventType = wxEVT_COMMAND_RIGHT_CLICK;
 178             break;
 179
 180         case NM_RDBLCLK:
 181             eventType = wxEVT_COMMAND_RIGHT_DCLICK;
 182             break;
 183
 184         case NM_SETFOCUS:
 185             eventType = wxEVT_COMMAND_SET_FOCUS;
 186             break;
 187
 188         case NM_KILLFOCUS:
 189             eventType = wxEVT_COMMAND_KILL_FOCUS;
 190             break;
 191
 192         case NM_RETURN:
 193             eventType = wxEVT_COMMAND_ENTER;
 194             break;
 195
 196         default:
 197             return wxWindow::MSWOnNotify(idCtrl, lParam, result);
 198     }
 199
 200     event.SetEventType(eventType);
 201     event.SetEventObject(this);
 202
 203     return GetEventHandler()->ProcessEvent(event);
 204 }
 205 #endif // Win95
 206
 207 void wxControl::OnEraseBackground(wxEraseEvent& event)
 208 {
 209     // In general, you don't want to erase the background of a control,
 210     // or you'll get a flicker.
 211     // TODO: move this 'null' function into each control that
 212     // might flicker.
 213
 214     RECT rect;
 215     ::GetClientRect(GetHwnd(), &rect);
 216
 217     HBRUSH hBrush = ::CreateSolidBrush(wxColourToRGB(GetBackgroundColour()));
 218
 219     HDC hdc = GetHdcOf((*event.GetDC()));
 220     int mode = ::SetMapMode(hdc, MM_TEXT);
 221
 222     ::FillRect(hdc, &rect, hBrush);
 223     ::DeleteObject(hBrush);
 224     ::SetMapMode(hdc, mode);
 225 }
 226
 227 WXHBRUSH wxControl::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
 228                                WXUINT message,
 229                                WXWPARAM wParam,
 230                                WXLPARAM lParam)
 231 {
 232 #if wxUSE_CTL3D
 233     if ( m_useCtl3D )
 234     {
 235         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
 236         return (WXHBRUSH) hbrush;
 237     }
 238 #endif // wxUSE_CTL3D
 239
 240     HDC hdc = (HDC)pDC;
 241     if (GetParent()->GetTransparentBackground())
 242         SetBkMode(hdc, TRANSPARENT);
 243     else
 244         SetBkMode(hdc, OPAQUE);
 245
 246     const wxColour& colBack = GetBackgroundColour();
 247     ::SetBkColor(hdc, wxColourToRGB(colBack));
 248     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
 249
 250     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
 251
 252     return (WXHBRUSH)brush->GetResourceHandle();
 253 }
 254
 255 WXDWORD wxControl::GetExStyle(WXDWORD& style, bool *want3D) const
 256 {
 257     WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, want3D);
 258
 259     // Even with extended styles, need to combine with WS_BORDER for them to
 260     // look right.
 261     if ( *want3D || wxStyleHasBorder(m_windowStyle) )
 262         style |= WS_BORDER;
 263
 264     return exStyle;
 265 }
 266
 267 // ---------------------------------------------------------------------------
 268 // global functions
 269 // ---------------------------------------------------------------------------
 270
 271 // Call this repeatedly for several wnds to find the overall size
 272 // of the widget.
 273 // Call it initially with -1 for all values in rect.
 274 // Keep calling for other widgets, and rect will be modified
 275 // to calculate largest bounding rectangle.
 276 void wxFindMaxSize(WXHWND wnd, RECT *rect)
 277 {
 278     int left = rect->left;
 279     int right = rect->right;
 280     int top = rect->top;
 281     int bottom = rect->bottom;
 282
 283     GetWindowRect((HWND) wnd, rect);
 284
 285     if (left < 0)
 286         return;
 287
 288     if (left < rect->left)
 289         rect->left = left;
 290
 291     if (right > rect->right)
 292         rect->right = right;
 293
 294     if (top < rect->top)
 295         rect->top = top;
 296
 297     if (bottom > rect->bottom)
 298         rect->bottom = bottom;
 299 }
 300