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