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