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