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 }
  57
  58 wxControl::~wxControl(void)
  59 {
  60   m_isBeingDeleted = TRUE;
  61
  62   // If we delete an item, we should initialize the parent panel,
  63   // because it could now be invalid.
  64   wxWindow *parent = (wxWindow *)GetParent();
  65   if (parent)
  66   {
  67     if (parent->GetDefaultItem() == (wxButton*) this)
  68         parent->SetDefaultItem(NULL);
  69   }
  70 }
  71
  72 void wxControl::SetLabel(const wxString& label)
  73 {
  74   if (GetHWND())
  75     SetWindowText((HWND) GetHWND(), (const char *)label);
  76 }
  77
  78 wxString wxControl::GetLabel(void) const
  79 {
  80     wxBuffer[0] = 0;
  81     if (GetHWND())
  82     {
  83         int len = GetWindowText((HWND)GetHWND(), wxBuffer, 256);
  84         wxBuffer[len] = 0;
  85     }
  86
  87   return wxString(wxBuffer);
  88 }
  89
  90 // Call this repeatedly for several wnds to find the overall size
  91 // of the widget.
  92 // Call it initially with -1 for all values in rect.
  93 // Keep calling for other widgets, and rect will be modified
  94 // to calculate largest bounding rectangle.
  95 void wxFindMaxSize(WXHWND wnd, RECT *rect)
  96 {
  97   int left = rect->left;
  98   int right = rect->right;
  99   int top = rect->top;
 100   int bottom = rect->bottom;
 101
 102   GetWindowRect((HWND) wnd, rect);
 103
 104   if (left < 0)
 105     return;
 106
 107   if (left < rect->left)
 108     rect->left = left;
 109
 110   if (right > rect->right)
 111     rect->right = right;
 112
 113   if (top < rect->top)
 114     rect->top = top;
 115
 116   if (bottom > rect->bottom)
 117     rect->bottom = bottom;
 118
 119 }
 120
 121 /*
 122 // Not currently used
 123 void wxConvertDialogToPixels(wxWindow *control, int *x, int *y)
 124 {
 125   if (control->m_windowParent && control->m_windowParent->is_dialog)
 126   {
 127     DWORD word = GetDialogBaseUnits();
 128     int xs = LOWORD(word);
 129     int ys = HIWORD(word);
 130     *x = (int)(*x * xs/4);
 131     *y = (int)(*y * ys/8);
 132   }
 133   else
 134   {
 135     *x = *x;
 136     *y = *y;
 137   }
 138 }
 139 */
 140
 141 void wxControl::MSWOnMouseMove(int x, int y, WXUINT flags)
 142 {
 143 /*
 144   // Trouble with this is that it sets the cursor for controls too :-(
 145   if (m_windowCursor.Ok() && !wxIsBusy())
 146     ::SetCursor(m_windowCursor.GetHCURSOR());
 147 */
 148
 149   if (!m_mouseInWindow)
 150   {
 151     // Generate an ENTER event
 152     m_mouseInWindow = TRUE;
 153     MSWOnMouseEnter(x, y, flags);
 154   }
 155
 156   wxMouseEvent event(wxEVT_MOTION);
 157
 158   event.m_x = x; event.m_y = y;
 159   event.m_shiftDown = ((flags & MK_SHIFT) != 0);
 160   event.m_controlDown = ((flags & MK_CONTROL) != 0);
 161   event.m_leftDown = ((flags & MK_LBUTTON) != 0);
 162   event.m_middleDown = ((flags & MK_MBUTTON) != 0);
 163   event.m_rightDown = ((flags & MK_RBUTTON) != 0);
 164   event.SetTimestamp(wxApp::sm_lastMessageTime);
 165   event.SetEventObject( this );
 166
 167   // Window gets a click down message followed by a mouse move
 168   // message even if position isn't changed!  We want to discard
 169   // the trailing move event if x and y are the same.
 170   if ((m_lastEvent == wxEVT_RIGHT_DOWN || m_lastEvent == wxEVT_LEFT_DOWN ||
 171        m_lastEvent == wxEVT_MIDDLE_DOWN) &&
 172       (m_lastXPos == event.GetX() && m_lastYPos == event.GetY()))
 173   {
 174     m_lastXPos = event.GetX(); m_lastYPos = event.GetY();
 175     m_lastEvent = wxEVT_MOTION;
 176     return;
 177   }
 178
 179   m_lastEvent = wxEVT_MOTION;
 180   m_lastXPos = event.GetX(); m_lastYPos = event.GetY();
 181
 182   if (!GetEventHandler()->ProcessEvent(event))
 183     Default();
 184 }
 185
 186 bool wxControl::MSWNotify(WXWPARAM wParam, WXLPARAM lParam,
 187                           WXLPARAM* result)
 188 {
 189 #if defined(__WIN95__)
 190         wxCommandEvent event(wxEVT_NULL, m_windowId);
 191         wxEventType eventType = wxEVT_NULL;
 192         NMHDR *hdr1 = (NMHDR*) lParam;
 193         switch ( hdr1->code )
 194         {
 195                 case NM_CLICK:
 196                 {
 197                         eventType = wxEVT_COMMAND_LEFT_CLICK;
 198                         break;
 199                 }
 200                 case NM_DBLCLK:
 201                 {
 202                         eventType = wxEVT_COMMAND_LEFT_DCLICK;
 203                         break;
 204                 }
 205                 case NM_RCLICK:
 206                 {
 207                         eventType = wxEVT_COMMAND_RIGHT_CLICK;
 208                         break;
 209                 }
 210                 case NM_RDBLCLK:
 211                 {
 212                         eventType = wxEVT_COMMAND_RIGHT_DCLICK;
 213                         break;
 214                 }
 215                 case NM_SETFOCUS:
 216                 {
 217                         eventType = wxEVT_COMMAND_SET_FOCUS;
 218                         break;
 219                 }
 220                 case NM_KILLFOCUS:
 221                 {
 222                         eventType = wxEVT_COMMAND_KILL_FOCUS;
 223                         break;
 224                 }
 225                 case NM_RETURN:
 226                 {
 227                         eventType = wxEVT_COMMAND_ENTER;
 228                         break;
 229                 }
 230 /* Not implemented
 231                 case NM_OUTOFMEMORY:
 232                 {
 233                         eventType = wxEVT_COMMAND_OUT_OF_MEMORY;
 234                         break;
 235                 }
 236 */
 237                 default:
 238             return wxWindow::MSWNotify(wParam, lParam, result);
 239         }
 240
 241     event.SetEventType(eventType);
 242         event.SetEventObject(this);
 243
 244         if ( !GetEventHandler()->ProcessEvent(event) )
 245                 return FALSE;
 246         return TRUE;
 247 #else   // !Win95
 248     return FALSE;
 249 #endif
 250 }
 251
 252 /*
 253  * Allocates control IDs within the appropriate range
 254  */
 255
 256
 257 int NewControlId(void)
 258 {
 259   static int controlId = 0;
 260   controlId ++;
 261   return controlId;
 262 }
 263
 264 void wxControl::ProcessCommand (wxCommandEvent & event)
 265 {
 266   // Tries:
 267   // 1) A callback function (to become obsolete)
 268   // 2) OnCommand, starting at this window and working up parent hierarchy
 269   // 3) OnCommand then calls ProcessEvent to search the event tables.
 270   if (m_callback)
 271     {
 272       (void) (*(m_callback)) (*this, event);
 273     }
 274     else
 275     {
 276       GetEventHandler()->OnCommand(*this, event);
 277     }
 278 }
 279
 280 void wxControl::OnEraseBackground(wxEraseEvent& event)
 281 {
 282   // In general, you don't want to erase the background of a control,
 283   // or you'll get a flicker.
 284   // TODO: move this 'null' function into each control that
 285   // might flicker.
 286
 287   RECT rect;
 288   ::GetClientRect((HWND) GetHWND(), &rect);
 289
 290   HBRUSH hBrush = ::CreateSolidBrush(PALETTERGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 291   int mode = ::SetMapMode((HDC) event.GetDC()->GetHDC(), MM_TEXT);
 292
 293   ::FillRect ((HDC) event.GetDC()->GetHDC(), &rect, hBrush);
 294   ::DeleteObject(hBrush);
 295   ::SetMapMode((HDC) event.GetDC()->GetHDC(), mode);
 296 }
 297
 298 void wxControl::SetClientSize (int width, int height)
 299 {
 300   SetSize (-1, -1, width, height);
 301 }
 302
 303 void wxControl::Centre (int direction)
 304 {
 305   int x, y, width, height, panel_width, panel_height, new_x, new_y;
 306
 307   wxWindow *parent = (wxWindow *) GetParent ();
 308   if (!parent)
 309     return;
 310
 311   parent->GetClientSize (&panel_width, &panel_height);
 312   GetSize (&width, &height);
 313   GetPosition (&x, &y);
 314
 315   new_x = x;
 316   new_y = y;
 317
 318   if (direction & wxHORIZONTAL)
 319     new_x = (int) ((panel_width - width) / 2);
 320
 321   if (direction & wxVERTICAL)
 322     new_y = (int) ((panel_height - height) / 2);
 323
 324   SetSize (new_x, new_y, width, height);
 325   int temp_x, temp_y;
 326   GetPosition (&temp_x, &temp_y);
 327   GetPosition (&temp_x, &temp_y);
 328 }
 329
 330