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/app.h"
  25 #include "wx/dcclient.h"
  26 #endif
  27
  28 #include "wx/msw/private.h"
  29
  30 #if defined(__WIN95__) && !defined(__GNUWIN32__)
  31 #include <commctrl.h>
  32 #endif
  33
  34 #ifdef GetCharWidth
  35 #undef GetCharWidth
  36 #undef GetWindowProc
  37 #endif
  38
  39 #if !USE_SHARED_LIBRARY
  40 IMPLEMENT_ABSTRACT_CLASS(wxControl, wxWindow)
  41
  42 BEGIN_EVENT_TABLE(wxControl, wxWindow)
  43         EVT_ERASE_BACKGROUND(wxControl::OnEraseBackground)
  44 END_EVENT_TABLE()
  45 #endif
  46
  47 // Item members
  48 wxControl::wxControl(void)
  49 {
  50   m_backgroundColour = *wxWHITE;
  51   m_foregroundColour = *wxBLACK;
  52   m_callback = 0;
  53 }
  54
  55 wxControl::~wxControl(void)
  56 {
  57   m_isBeingDeleted = TRUE;
  58
  59   // If we delete an item, we should initialize the parent panel,
  60   // because it could now be invalid.
  61   wxWindow *parent = (wxWindow *)GetParent();
  62   if (parent)
  63   {
  64     if (parent->GetDefaultItem() == this)
  65         parent->SetDefaultItem(NULL);
  66   }
  67 }
  68
  69 void wxControl::SetLabel(const wxString& label)
  70 {
  71   if (GetHWND())
  72     SetWindowText((HWND) GetHWND(), (const char *)label);
  73 }
  74
  75 wxString wxControl::GetLabel(void) const
  76 {
  77   wxBuffer[0] = 0;
  78   if (GetHWND())
  79     GetWindowText((HWND)GetHWND(), wxBuffer, 1000);
  80
  81   return wxString(wxBuffer);
  82 }
  83
  84 // Call this repeatedly for several wnds to find the overall size
  85 // of the widget.
  86 // Call it initially with -1 for all values in rect.
  87 // Keep calling for other widgets, and rect will be modified
  88 // to calculate largest bounding rectangle.
  89 void wxFindMaxSize(WXHWND wnd, RECT *rect)
  90 {
  91   int left = rect->left;
  92   int right = rect->right;
  93   int top = rect->top;
  94   int bottom = rect->bottom;
  95
  96   GetWindowRect((HWND) wnd, rect);
  97
  98   if (left < 0)
  99     return;
 100
 101   if (left < rect->left)
 102     rect->left = left;
 103
 104   if (right > rect->right)
 105     rect->right = right;
 106
 107   if (top < rect->top)
 108     rect->top = top;
 109
 110   if (bottom > rect->bottom)
 111     rect->bottom = bottom;
 112
 113 }
 114
 115 /*
 116 // Not currently used
 117 void wxConvertDialogToPixels(wxWindow *control, int *x, int *y)
 118 {
 119   if (control->m_windowParent && control->m_windowParent->is_dialog)
 120   {
 121     DWORD word = GetDialogBaseUnits();
 122     int xs = LOWORD(word);
 123     int ys = HIWORD(word);
 124     *x = (int)(*x * xs/4);
 125     *y = (int)(*y * ys/8);
 126   }
 127   else
 128   {
 129     *x = *x;
 130     *y = *y;
 131   }
 132 }
 133 */
 134
 135 void wxControl::MSWOnMouseMove(int x, int y, WXUINT flags)
 136 {
 137 /*
 138   // Trouble with this is that it sets the cursor for controls too :-(
 139   if (m_windowCursor.Ok() && !wxIsBusy())
 140     ::SetCursor(m_windowCursor.GetHCURSOR());
 141 */
 142
 143   if (!m_mouseInWindow)
 144   {
 145     // Generate an ENTER event
 146     m_mouseInWindow = TRUE;
 147     MSWOnMouseEnter(x, y, flags);
 148   }
 149
 150   wxMouseEvent event(wxEVT_MOTION);
 151
 152   event.m_x = x; event.m_y = y;
 153   event.m_shiftDown = ((flags & MK_SHIFT) != 0);
 154   event.m_controlDown = ((flags & MK_CONTROL) != 0);
 155   event.m_leftDown = ((flags & MK_LBUTTON) != 0);
 156   event.m_middleDown = ((flags & MK_MBUTTON) != 0);
 157   event.m_rightDown = ((flags & MK_RBUTTON) != 0);
 158   event.SetTimestamp(wxApp::sm_lastMessageTime);
 159   event.SetEventObject( this );
 160
 161   // Window gets a click down message followed by a mouse move
 162   // message even if position isn't changed!  We want to discard
 163   // the trailing move event if x and y are the same.
 164   if ((m_lastEvent == wxEVT_RIGHT_DOWN || m_lastEvent == wxEVT_LEFT_DOWN ||
 165        m_lastEvent == wxEVT_MIDDLE_DOWN) &&
 166       (m_lastXPos == event.GetX() && m_lastYPos == event.GetY()))
 167   {
 168     m_lastXPos = event.GetX(); m_lastYPos = event.GetY();
 169     m_lastEvent = wxEVT_MOTION;
 170     return;
 171   }
 172
 173   m_lastEvent = wxEVT_MOTION;
 174   m_lastXPos = event.GetX(); m_lastYPos = event.GetY();
 175
 176   if (!GetEventHandler()->ProcessEvent(event))
 177     Default();
 178 }
 179
 180 long wxControl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 181 {
 182   return wxWindow::MSWWindowProc(nMsg, wParam, lParam);
 183 }
 184
 185 bool wxControl::MSWNotify(WXWPARAM wParam, WXLPARAM lParam)
 186 {
 187 #if defined(__WIN95__)
 188         wxCommandEvent event(wxEVT_NULL, m_windowId);
 189         wxEventType eventType = wxEVT_NULL;
 190         NMHDR *hdr1 = (NMHDR*) lParam;
 191         switch ( hdr1->code )
 192         {
 193                 case NM_CLICK:
 194                 {
 195                         eventType = wxEVT_COMMAND_LEFT_CLICK;
 196                         break;
 197                 }
 198                 case NM_DBLCLK:
 199                 {
 200                         eventType = wxEVT_COMMAND_LEFT_DCLICK;
 201                         break;
 202                 }
 203                 case NM_RCLICK:
 204                 {
 205                         eventType = wxEVT_COMMAND_RIGHT_CLICK;
 206                         break;
 207                 }
 208                 case NM_RDBLCLK:
 209                 {
 210                         eventType = wxEVT_COMMAND_RIGHT_DCLICK;
 211                         break;
 212                 }
 213                 case NM_SETFOCUS:
 214                 {
 215                         eventType = wxEVT_COMMAND_SET_FOCUS;
 216                         break;
 217                 }
 218                 case NM_KILLFOCUS:
 219                 {
 220                         eventType = wxEVT_COMMAND_KILL_FOCUS;
 221                         break;
 222                 }
 223                 case NM_RETURN:
 224                 {
 225                         eventType = wxEVT_COMMAND_ENTER;
 226                         break;
 227                 }
 228 /* Not implemented
 229                 case NM_OUTOFMEMORY:
 230                 {
 231                         eventType = wxEVT_COMMAND_OUT_OF_MEMORY;
 232                         break;
 233                 }
 234 */
 235                 default :
 236                         return FALSE;
 237                         break;
 238         }
 239     event.SetEventType(eventType);
 240         event.SetEventObject(this);
 241
 242         if ( !ProcessEvent(event) )
 243                 return FALSE;
 244         return TRUE;
 245 #else
 246   return FALSE;
 247 #endif
 248 }
 249
 250 /*
 251  * Allocates control IDs within the appropriate range
 252  */
 253
 254
 255 int NewControlId(void)
 256 {
 257   static int controlId = 0;
 258   controlId ++;
 259   return controlId;
 260 }
 261
 262 void wxControl::ProcessCommand (wxCommandEvent & event)
 263 {
 264   // Tries:
 265   // 1) A callback function (to become obsolete)
 266   // 2) OnCommand, starting at this window and working up parent hierarchy
 267   // 3) OnCommand then calls ProcessEvent to search the event tables.
 268   if (m_callback)
 269     {
 270       (void) (*(m_callback)) (*this, event);
 271     }
 272     else
 273     {
 274       GetEventHandler()->OnCommand(*this, event);
 275     }
 276 }
 277
 278 void wxControl::OnEraseBackground(wxEraseEvent& event)
 279 {
 280   // In general, you don't want to erase the background of a control,
 281   // or you'll get a flicker.
 282   // TODO: move this 'null' function into each control that
 283   // might flicker.
 284
 285   RECT rect;
 286   ::GetClientRect((HWND) GetHWND(), &rect);
 287
 288   HBRUSH hBrush = ::CreateSolidBrush(PALETTERGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 289   int mode = ::SetMapMode((HDC) event.GetDC()->GetHDC(), MM_TEXT);
 290
 291   ::FillRect ((HDC) event.GetDC()->GetHDC(), &rect, hBrush);
 292   ::DeleteObject(hBrush);
 293   ::SetMapMode((HDC) event.GetDC()->GetHDC(), mode);
 294 }
 295
 296 void wxControl::SetClientSize (int width, int height)
 297 {
 298   SetSize (-1, -1, width, height);
 299 }
 300
 301 void wxControl::Centre (int direction)
 302 {
 303   int x, y, width, height, panel_width, panel_height, new_x, new_y;
 304
 305   wxWindow *parent = (wxWindow *) GetParent ();
 306   if (!parent)
 307     return;
 308
 309   parent->GetClientSize (&panel_width, &panel_height);
 310   GetSize (&width, &height);
 311   GetPosition (&x, &y);
 312
 313   new_x = x;
 314   new_y = y;
 315
 316   if (direction & wxHORIZONTAL)
 317     new_x = (int) ((panel_width - width) / 2);
 318
 319   if (direction & wxVERTICAL)
 320     new_y = (int) ((panel_height - height) / 2);
 321
 322   SetSize (new_x, new_y, width, height);
 323   int temp_x, temp_y;
 324   GetPosition (&temp_x, &temp_y);
 325   GetPosition (&temp_x, &temp_y);
 326 }
 327
 328