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__)
  34 #include <commctrl.h>
  35 #endif
  36
  37 #ifdef GetCharWidth
  38 #undef GetCharWidth
  39 #undef GetWindowProc
  40 #endif
  41
  42 #if !USE_SHARED_LIBRARY
  43 IMPLEMENT_ABSTRACT_CLASS(wxControl, wxWindow)
  44
  45 BEGIN_EVENT_TABLE(wxControl, wxWindow)
  46     EVT_ERASE_BACKGROUND(wxControl::OnEraseBackground)
  47 END_EVENT_TABLE()
  48 #endif
  49
  50 // Item members
  51 wxControl::wxControl(void)
  52 {
  53   m_backgroundColour = *wxWHITE;
  54   m_foregroundColour = *wxBLACK;
  55   m_callback = 0;
  56 //  m_windowCursor = wxNullCursor; // To avoid the standard cursor being used
  57 }
  58
  59 wxControl::~wxControl(void)
  60 {
  61   m_isBeingDeleted = TRUE;
  62
  63   // If we delete an item, we should initialize the parent panel,
  64   // because it could now be invalid.
  65   wxWindow *parent = (wxWindow *)GetParent();
  66   if (parent)
  67   {
  68     if (parent->GetDefaultItem() == (wxButton*) this)
  69         parent->SetDefaultItem(NULL);
  70   }
  71 }
  72
  73 void wxControl::SetLabel(const wxString& label)
  74 {
  75   if (GetHWND())
  76     SetWindowText((HWND) GetHWND(), (const char *)label);
  77 }
  78
  79 wxString wxControl::GetLabel(void) const
  80 {
  81     wxBuffer[0] = 0;
  82     if (GetHWND())
  83     {
  84         int len = GetWindowText((HWND)GetHWND(), wxBuffer, 256);
  85         wxBuffer[len] = 0;
  86     }
  87
  88   return wxString(wxBuffer);
  89 }
  90
  91 // Call this repeatedly for several wnds to find the overall size
  92 // of the widget.
  93 // Call it initially with -1 for all values in rect.
  94 // Keep calling for other widgets, and rect will be modified
  95 // to calculate largest bounding rectangle.
  96 void wxFindMaxSize(WXHWND wnd, RECT *rect)
  97 {
  98   int left = rect->left;
  99   int right = rect->right;
 100   int top = rect->top;
 101   int bottom = rect->bottom;
 102
 103   GetWindowRect((HWND) wnd, rect);
 104
 105   if (left < 0)
 106     return;
 107
 108   if (left < rect->left)
 109     rect->left = left;
 110
 111   if (right > rect->right)
 112     rect->right = right;
 113
 114   if (top < rect->top)
 115     rect->top = top;
 116
 117   if (bottom > rect->bottom)
 118     rect->bottom = bottom;
 119
 120 }
 121
 122 #ifdef __WIN95__
 123 bool wxControl::MSWOnNotify(int idCtrl,
 124                             WXLPARAM lParam,
 125                             WXLPARAM* result)
 126 {
 127     wxCommandEvent event(wxEVT_NULL, m_windowId);
 128     wxEventType eventType = wxEVT_NULL;
 129     NMHDR *hdr1 = (NMHDR*) lParam;
 130     switch ( hdr1->code )
 131     {
 132         case NM_CLICK:
 133             eventType = wxEVT_COMMAND_LEFT_CLICK;
 134             break;
 135
 136         case NM_DBLCLK:
 137             eventType = wxEVT_COMMAND_LEFT_DCLICK;
 138             break;
 139
 140         case NM_RCLICK:
 141             eventType = wxEVT_COMMAND_RIGHT_CLICK;
 142             break;
 143
 144         case NM_RDBLCLK:
 145             eventType = wxEVT_COMMAND_RIGHT_DCLICK;
 146             break;
 147
 148         case NM_SETFOCUS:
 149             eventType = wxEVT_COMMAND_SET_FOCUS;
 150             break;
 151
 152         case NM_KILLFOCUS:
 153             eventType = wxEVT_COMMAND_KILL_FOCUS;
 154             break;
 155
 156         case NM_RETURN:
 157             eventType = wxEVT_COMMAND_ENTER;
 158             break;
 159
 160         default:
 161             return wxWindow::MSWOnNotify(idCtrl, lParam, result);
 162     }
 163
 164     event.SetEventType(eventType);
 165     event.SetEventObject(this);
 166
 167     return GetEventHandler()->ProcessEvent(event);
 168 }
 169 #endif // Win95
 170
 171 void wxControl::ProcessCommand (wxCommandEvent & event)
 172 {
 173   // Tries:
 174   // 1) A callback function (to become obsolete)
 175   // 2) OnCommand, starting at this window and working up parent hierarchy
 176   // 3) OnCommand then calls ProcessEvent to search the event tables.
 177   if (m_callback)
 178     {
 179       (void) (*(m_callback)) (*this, event);
 180     }
 181     else
 182     {
 183       GetEventHandler()->OnCommand(*this, event);
 184     }
 185 }
 186
 187 void wxControl::OnEraseBackground(wxEraseEvent& event)
 188 {
 189   // In general, you don't want to erase the background of a control,
 190   // or you'll get a flicker.
 191   // TODO: move this 'null' function into each control that
 192   // might flicker.
 193
 194   RECT rect;
 195   ::GetClientRect((HWND) GetHWND(), &rect);
 196
 197   HBRUSH hBrush = ::CreateSolidBrush(PALETTERGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 198   int mode = ::SetMapMode((HDC) event.GetDC()->GetHDC(), MM_TEXT);
 199
 200   ::FillRect ((HDC) event.GetDC()->GetHDC(), &rect, hBrush);
 201   ::DeleteObject(hBrush);
 202   ::SetMapMode((HDC) event.GetDC()->GetHDC(), mode);
 203 }
 204
 205 void wxControl::SetClientSize (int width, int height)
 206 {
 207   SetSize (-1, -1, width, height);
 208 }
 209
 210 void wxControl::Centre (int direction)
 211 {
 212   int x, y, width, height, panel_width, panel_height, new_x, new_y;
 213
 214   wxWindow *parent = (wxWindow *) GetParent ();
 215   if (!parent)
 216     return;
 217
 218   parent->GetClientSize (&panel_width, &panel_height);
 219   GetSize (&width, &height);
 220   GetPosition (&x, &y);
 221
 222   new_x = x;
 223   new_y = y;
 224
 225   if (direction & wxHORIZONTAL)
 226     new_x = (int) ((panel_width - width) / 2);
 227
 228   if (direction & wxVERTICAL)
 229     new_y = (int) ((panel_height - height) / 2);
 230
 231   SetSize (new_x, new_y, width, height);
 232   int temp_x, temp_y;
 233   GetPosition (&temp_x, &temp_y);
 234   GetPosition (&temp_x, &temp_y);
 235 }
 236
 237