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 /*
 123 // Not currently used
 124 void wxConvertDialogToPixels(wxWindow *control, int *x, int *y)
 125 {
 126   if (control->m_windowParent && control->m_windowParent->is_dialog)
 127   {
 128     DWORD word = GetDialogBaseUnits();
 129     int xs = LOWORD(word);
 130     int ys = HIWORD(word);
 131     *x = (int)(*x * xs/4);
 132     *y = (int)(*y * ys/8);
 133   }
 134   else
 135   {
 136     *x = *x;
 137     *y = *y;
 138   }
 139 }
 140 */
 141
 142 void wxControl::MSWOnMouseMove(int x, int y, WXUINT flags)
 143 {
 144 /*
 145   // Trouble with this is that it sets the cursor for controls too :-(
 146   if (m_windowCursor.Ok() && !wxIsBusy())
 147     ::SetCursor(m_windowCursor.GetHCURSOR());
 148 */
 149
 150   if (!m_mouseInWindow)
 151   {
 152     // Generate an ENTER event
 153     m_mouseInWindow = TRUE;
 154     MSWOnMouseEnter(x, y, flags);
 155   }
 156
 157   wxMouseEvent event(wxEVT_MOTION);
 158
 159   event.m_x = x; event.m_y = y;
 160   event.m_shiftDown = ((flags & MK_SHIFT) != 0);
 161   event.m_controlDown = ((flags & MK_CONTROL) != 0);
 162   event.m_leftDown = ((flags & MK_LBUTTON) != 0);
 163   event.m_middleDown = ((flags & MK_MBUTTON) != 0);
 164   event.m_rightDown = ((flags & MK_RBUTTON) != 0);
 165   event.SetTimestamp(wxApp::sm_lastMessageTime);
 166   event.SetEventObject( this );
 167
 168   // Window gets a click down message followed by a mouse move
 169   // message even if position isn't changed!  We want to discard
 170   // the trailing move event if x and y are the same.
 171   if ((m_lastEvent == wxEVT_RIGHT_DOWN || m_lastEvent == wxEVT_LEFT_DOWN ||
 172        m_lastEvent == wxEVT_MIDDLE_DOWN) &&
 173       (m_lastXPos == event.GetX() && m_lastYPos == event.GetY()))
 174   {
 175     m_lastXPos = event.GetX(); m_lastYPos = event.GetY();
 176     m_lastEvent = wxEVT_MOTION;
 177     return;
 178   }
 179
 180   m_lastEvent = wxEVT_MOTION;
 181   m_lastXPos = event.GetX(); m_lastYPos = event.GetY();
 182
 183   if (!GetEventHandler()->ProcessEvent(event))
 184     Default();
 185 }
 186
 187 bool wxControl::MSWNotify(WXWPARAM wParam, WXLPARAM lParam,
 188                           WXLPARAM* result)
 189 {
 190 #if defined(__WIN95__)
 191         wxCommandEvent event(wxEVT_NULL, m_windowId);
 192         wxEventType eventType = wxEVT_NULL;
 193         NMHDR *hdr1 = (NMHDR*) lParam;
 194         switch ( hdr1->code )
 195         {
 196                 case NM_CLICK:
 197                 {
 198                         eventType = wxEVT_COMMAND_LEFT_CLICK;
 199                         break;
 200                 }
 201                 case NM_DBLCLK:
 202                 {
 203                         eventType = wxEVT_COMMAND_LEFT_DCLICK;
 204                         break;
 205                 }
 206                 case NM_RCLICK:
 207                 {
 208                         eventType = wxEVT_COMMAND_RIGHT_CLICK;
 209                         break;
 210                 }
 211                 case NM_RDBLCLK:
 212                 {
 213                         eventType = wxEVT_COMMAND_RIGHT_DCLICK;
 214                         break;
 215                 }
 216                 case NM_SETFOCUS:
 217                 {
 218                         eventType = wxEVT_COMMAND_SET_FOCUS;
 219                         break;
 220                 }
 221                 case NM_KILLFOCUS:
 222                 {
 223                         eventType = wxEVT_COMMAND_KILL_FOCUS;
 224                         break;
 225                 }
 226                 case NM_RETURN:
 227                 {
 228                         eventType = wxEVT_COMMAND_ENTER;
 229                         break;
 230                 }
 231 /* Not implemented
 232                 case NM_OUTOFMEMORY:
 233                 {
 234                         eventType = wxEVT_COMMAND_OUT_OF_MEMORY;
 235                         break;
 236                 }
 237 */
 238                 default:
 239             return wxWindow::MSWNotify(wParam, lParam, result);
 240         }
 241
 242     event.SetEventType(eventType);
 243         event.SetEventObject(this);
 244
 245         if ( !GetEventHandler()->ProcessEvent(event) )
 246                 return FALSE;
 247         return TRUE;
 248 #else   // !Win95
 249     return FALSE;
 250 #endif
 251 }
 252
 253 /*
 254  * Allocates control IDs within the appropriate range
 255  */
 256
 257
 258 int NewControlId(void)
 259 {
 260   static int controlId = 0;
 261   controlId ++;
 262   return controlId;
 263 }
 264
 265 void wxControl::ProcessCommand (wxCommandEvent & event)
 266 {
 267   // Tries:
 268   // 1) A callback function (to become obsolete)
 269   // 2) OnCommand, starting at this window and working up parent hierarchy
 270   // 3) OnCommand then calls ProcessEvent to search the event tables.
 271   if (m_callback)
 272     {
 273       (void) (*(m_callback)) (*this, event);
 274     }
 275     else
 276     {
 277       GetEventHandler()->OnCommand(*this, event);
 278     }
 279 }
 280
 281 void wxControl::OnEraseBackground(wxEraseEvent& event)
 282 {
 283   // In general, you don't want to erase the background of a control,
 284   // or you'll get a flicker.
 285   // TODO: move this 'null' function into each control that
 286   // might flicker.
 287
 288   RECT rect;
 289   ::GetClientRect((HWND) GetHWND(), &rect);
 290
 291   HBRUSH hBrush = ::CreateSolidBrush(PALETTERGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 292   int mode = ::SetMapMode((HDC) event.GetDC()->GetHDC(), MM_TEXT);
 293
 294   ::FillRect ((HDC) event.GetDC()->GetHDC(), &rect, hBrush);
 295   ::DeleteObject(hBrush);
 296   ::SetMapMode((HDC) event.GetDC()->GetHDC(), mode);
 297 }
 298
 299 void wxControl::SetClientSize (int width, int height)
 300 {
 301   SetSize (-1, -1, width, height);
 302 }
 303
 304 void wxControl::Centre (int direction)
 305 {
 306   int x, y, width, height, panel_width, panel_height, new_x, new_y;
 307
 308   wxWindow *parent = (wxWindow *) GetParent ();
 309   if (!parent)
 310     return;
 311
 312   parent->GetClientSize (&panel_width, &panel_height);
 313   GetSize (&width, &height);
 314   GetPosition (&x, &y);
 315
 316   new_x = x;
 317   new_y = y;
 318
 319   if (direction & wxHORIZONTAL)
 320     new_x = (int) ((panel_width - width) / 2);
 321
 322   if (direction & wxVERTICAL)
 323     new_y = (int) ((panel_height - height) / 2);
 324
 325   SetSize (new_x, new_y, width, height);
 326   int temp_x, temp_y;
 327   GetPosition (&temp_x, &temp_y);
 328   GetPosition (&temp_x, &temp_y);
 329 }
 330
 331