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, WXDWORD style)
  62 {
  63     // VZ: if someone could put a comment here explaining what exactly this is
  64     //     needed for, it would be nice...
  65     bool want3D;
  66
  67     // all controls have these childs (wxWindows creates all controls visible
  68     // by default)
  69     style |= WS_CHILD | WS_VISIBLE;
  70
  71     m_hWnd = (WXHWND)::CreateWindowEx
  72                        (
  73                         GetExStyle(style, &want3D), // extended style
  74                         classname,          // the kind of control to create
  75                         NULL,               // the window name
  76                         style,              // the window style
  77                         0, 0, 0, 0,         // the window position and size
  78                         GetHwndOf(GetParent()),  // parent
  79                         (HMENU)GetId(),     // child id
  80                         wxGetInstance(),    // app instance
  81                         NULL                // creation parameters
  82                        );
  83
  84     if ( !m_hWnd )
  85     {
  86 #ifdef __WXDEBUG__
  87         wxLogError(wxT("Failed to create a control of class '%s'"), classname);
  88 #endif // DEBUG
  89
  90         return FALSE;
  91     }
  92
  93 #if wxUSE_CTL3D
  94     if ( want3D )
  95     {
  96         Ctl3dSubclassCtl(GetHwnd());
  97         m_useCtl3D = TRUE;
  98     }
  99 #endif // wxUSE_CTL3D
 100
 101     // subclass again for purposes of dialog editing mode
 102     SubclassWin(m_hWnd);
 103
 104     // controls use the same font and colours as their parent dialog by default
 105     InheritAttributes();
 106
 107     return TRUE;
 108 }
 109
 110 wxSize wxControl::DoGetBestSize()
 111 {
 112     return wxSize(DEFAULT_ITEM_WIDTH, DEFAULT_ITEM_HEIGHT);
 113 }
 114
 115 bool wxControl::ProcessCommand(wxCommandEvent& event)
 116 {
 117 #if WXWIN_COMPATIBILITY
 118     if ( m_callback )
 119     {
 120         (void)(*m_callback)(this, event);
 121
 122         return TRUE;
 123     }
 124     else
 125 #endif // WXWIN_COMPATIBILITY
 126
 127     return GetEventHandler()->ProcessEvent(event);
 128 }
 129
 130 #ifdef __WIN95__
 131 bool wxControl::MSWOnNotify(int idCtrl,
 132                             WXLPARAM lParam,
 133                             WXLPARAM* result)
 134 {
 135     wxCommandEvent event(wxEVT_NULL, m_windowId);
 136     wxEventType eventType = wxEVT_NULL;
 137     NMHDR *hdr1 = (NMHDR*) lParam;
 138     switch ( hdr1->code )
 139     {
 140         case NM_CLICK:
 141             eventType = wxEVT_COMMAND_LEFT_CLICK;
 142             break;
 143
 144         case NM_DBLCLK:
 145             eventType = wxEVT_COMMAND_LEFT_DCLICK;
 146             break;
 147
 148         case NM_RCLICK:
 149             eventType = wxEVT_COMMAND_RIGHT_CLICK;
 150             break;
 151
 152         case NM_RDBLCLK:
 153             eventType = wxEVT_COMMAND_RIGHT_DCLICK;
 154             break;
 155
 156         case NM_SETFOCUS:
 157             eventType = wxEVT_COMMAND_SET_FOCUS;
 158             break;
 159
 160         case NM_KILLFOCUS:
 161             eventType = wxEVT_COMMAND_KILL_FOCUS;
 162             break;
 163
 164         case NM_RETURN:
 165             eventType = wxEVT_COMMAND_ENTER;
 166             break;
 167
 168         default:
 169             return wxWindow::MSWOnNotify(idCtrl, lParam, result);
 170     }
 171
 172     event.SetEventType(eventType);
 173     event.SetEventObject(this);
 174
 175     return GetEventHandler()->ProcessEvent(event);
 176 }
 177 #endif // Win95
 178
 179 void wxControl::OnEraseBackground(wxEraseEvent& event)
 180 {
 181     // In general, you don't want to erase the background of a control,
 182     // or you'll get a flicker.
 183     // TODO: move this 'null' function into each control that
 184     // might flicker.
 185
 186     RECT rect;
 187     ::GetClientRect(GetHwnd(), &rect);
 188
 189     HBRUSH hBrush = ::CreateSolidBrush(wxColourToRGB(GetBackgroundColour()));
 190
 191     HDC hdc = GetHdcOf((*event.GetDC()));
 192     int mode = ::SetMapMode(hdc, MM_TEXT);
 193
 194     ::FillRect(hdc, &rect, hBrush);
 195     ::DeleteObject(hBrush);
 196     ::SetMapMode(hdc, mode);
 197 }
 198
 199 WXDWORD wxControl::GetExStyle(WXDWORD& style, bool *want3D) const
 200 {
 201     WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, want3D);
 202
 203     // Even with extended styles, need to combine with WS_BORDER for them to
 204     // look right.
 205     if ( *want3D || wxStyleHasBorder(m_windowStyle) )
 206         style |= WS_BORDER;
 207
 208     return exStyle;
 209 }
 210
 211 // ---------------------------------------------------------------------------
 212 // global functions
 213 // ---------------------------------------------------------------------------
 214
 215 // Call this repeatedly for several wnds to find the overall size
 216 // of the widget.
 217 // Call it initially with -1 for all values in rect.
 218 // Keep calling for other widgets, and rect will be modified
 219 // to calculate largest bounding rectangle.
 220 void wxFindMaxSize(WXHWND wnd, RECT *rect)
 221 {
 222     int left = rect->left;
 223     int right = rect->right;
 224     int top = rect->top;
 225     int bottom = rect->bottom;
 226
 227     GetWindowRect((HWND) wnd, rect);
 228
 229     if (left < 0)
 230         return;
 231
 232     if (left < rect->left)
 233         rect->left = left;
 234
 235     if (right > rect->right)
 236         rect->right = right;
 237
 238     if (top < rect->top)
 239         rect->top = top;
 240
 241     if (bottom > rect->bottom)
 242         rect->bottom = bottom;
 243 }
 244