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 #if 0
 136 // We can't rely on Windows giving us events corresponding to the wxWindows Z-ordering.
 137 // E.g. we can't push a wxGroupBox to the back for editing purposes.
 138 // Convert the item event to parent coordinates, then search for
 139 // an item that could receive this event.
 140 wxControl *wxFakeItemEvent(wxWindow *parent, wxControl *item, wxMouseEvent& event)
 141 {
 142   int x, y;
 143   item->GetPosition(&x, &y);
 144   event.m_x += x;
 145   event.m_y += y;
 146
 147   wxNode *node = parent->GetChildren()->Last();
 148   while (node)
 149   {
 150     wxControl *newItem = (wxControl *)node->Data();
 151     if (newItem->IsSelected() && newItem->SelectionHandleHitTest(event.x, event.GetY()))
 152     {
 153       // This event belongs to the panel.
 154       parent->GetEventHandler()->OldOnMouseEvent(event);
 155       return NULL;
 156     }
 157     else if (newItem->HitTest(event.x, event.GetY()))
 158     {
 159       int x1, y1;
 160       newItem->GetPosition(&x1, &y1);
 161       event.x -= x1;
 162       event.GetY() -= y1;
 163       newItem->OldOnMouseEvent(event);
 164       return newItem;
 165     }
 166     node = node->Previous();
 167   }
 168   // No takers, so do what we would have done anyway.
 169   event.x -= x;
 170   event.y -= y;
 171   item->OldOnMouseEvent(event);
 172   return item;
 173 }
 174 #endif
 175
 176 void wxControl::MSWOnMouseMove(const int x, const int y, const WXUINT flags)
 177 {
 178   // 'normal' move event...
 179   // Set cursor, but only if we're not in 'busy' mode
 180
 181 /*
 182   // Trouble with this is that it sets the cursor for controls too :-(
 183   if (m_windowCursor.Ok() && !wxIsBusy())
 184     ::SetCursor(m_windowCursor.GetHCURSOR());
 185 */
 186
 187   wxMouseEvent event(wxEVENT_TYPE_MOTION);
 188
 189 /*
 190   float px = (float)x;
 191   float py = (float)y;
 192
 193   MSWDeviceToLogical(&px, &py);
 194
 195   CalcUnscrolledPosition((int)px, (int)py, &event.m_x, &event.m_y);
 196 */
 197
 198   event.m_x = x; event.m_y = y;
 199   event.m_shiftDown = ((flags & MK_SHIFT) != 0);
 200   event.m_controlDown = ((flags & MK_CONTROL) != 0);
 201   event.m_leftDown = ((flags & MK_LBUTTON) != 0);
 202   event.m_middleDown = ((flags & MK_MBUTTON) != 0);
 203   event.m_rightDown = ((flags & MK_RBUTTON) != 0);
 204   event.SetTimestamp(wxApp::sm_lastMessageTime);
 205   event.SetEventObject( this );
 206
 207   // Window gets a click down message followed by a mouse move
 208   // message even if position isn't changed!  We want to discard
 209   // the trailing move event if x and y are the same.
 210   if ((m_lastEvent == wxEVENT_TYPE_RIGHT_DOWN || m_lastEvent == wxEVENT_TYPE_LEFT_DOWN ||
 211        m_lastEvent == wxEVENT_TYPE_MIDDLE_DOWN) &&
 212       (m_lastXPos == event.GetX() && m_lastYPos == event.GetY()))
 213   {
 214     m_lastXPos = event.GetX(); m_lastYPos = event.GetY();
 215     m_lastEvent = wxEVENT_TYPE_MOTION;
 216     return;
 217   }
 218
 219   m_lastEvent = wxEVENT_TYPE_MOTION;
 220   m_lastXPos = event.GetX(); m_lastYPos = event.GetY();
 221   GetEventHandler()->OldOnMouseEvent(event);
 222 }
 223
 224 long wxControl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 225 {
 226   return wxWindow::MSWWindowProc(nMsg, wParam, lParam);
 227 }
 228
 229 bool wxControl::MSWNotify(const WXWPARAM wParam, const WXLPARAM lParam)
 230 {
 231 #if defined(__WIN95__)
 232         wxCommandEvent event(0, m_windowId);
 233         int eventType = 0;
 234         NMHDR *hdr1 = (NMHDR*) lParam;
 235         switch ( hdr1->code )
 236         {
 237                 case NM_CLICK:
 238                 {
 239                         eventType = wxEVT_COMMAND_LEFT_CLICK;
 240                         break;
 241                 }
 242                 case NM_DBLCLK:
 243                 {
 244                         eventType = wxEVT_COMMAND_LEFT_DCLICK;
 245                         break;
 246                 }
 247                 case NM_RCLICK:
 248                 {
 249                         eventType = wxEVT_COMMAND_RIGHT_CLICK;
 250                         break;
 251                 }
 252                 case NM_RDBLCLK:
 253                 {
 254                         eventType = wxEVT_COMMAND_RIGHT_DCLICK;
 255                         break;
 256                 }
 257                 case NM_SETFOCUS:
 258                 {
 259                         eventType = wxEVT_COMMAND_SET_FOCUS;
 260                         break;
 261                 }
 262                 case NM_KILLFOCUS:
 263                 {
 264                         eventType = wxEVT_COMMAND_KILL_FOCUS;
 265                         break;
 266                 }
 267                 case NM_RETURN:
 268                 {
 269                         eventType = wxEVT_COMMAND_ENTER;
 270                         break;
 271                 }
 272 /* Not implemented
 273                 case NM_OUTOFMEMORY:
 274                 {
 275                         eventType = wxEVT_COMMAND_OUT_OF_MEMORY;
 276                         break;
 277                 }
 278 */
 279                 default :
 280                         return FALSE;
 281                         break;
 282         }
 283     event.SetEventType(eventType);
 284         event.SetEventObject(this);
 285
 286         if ( !ProcessEvent(event) )
 287                 return FALSE;
 288         return TRUE;
 289 #else
 290   return FALSE;
 291 #endif
 292 }
 293
 294 /*
 295  * Allocates control IDs within the appropriate range
 296  */
 297
 298
 299 int NewControlId(void)
 300 {
 301   static int controlId = 0;
 302   controlId ++;
 303   return controlId;
 304 }
 305
 306 void wxControl::ProcessCommand (wxCommandEvent & event)
 307 {
 308   // Tries:
 309   // 1) A callback function (to become obsolete)
 310   // 2) OnCommand, starting at this window and working up parent hierarchy
 311   // 3) OnCommand then calls ProcessEvent to search the event tables.
 312   if (m_callback)
 313     {
 314       (void) (*(m_callback)) (*this, event);
 315     }
 316     else
 317     {
 318       GetEventHandler()->OnCommand(*this, event);
 319     }
 320 }
 321
 322 void wxControl::OnEraseBackground(wxEraseEvent& event)
 323 {
 324   // In general, you don't want to erase the background of a control,
 325   // or you'll get a flicker.
 326   // TODO: move this 'null' function into each control that
 327   // might flicker.
 328
 329   RECT rect;
 330   ::GetClientRect((HWND) GetHWND(), &rect);
 331
 332   HBRUSH hBrush = ::CreateSolidBrush(PALETTERGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 333   int mode = ::SetMapMode((HDC) event.GetDC()->GetHDC(), MM_TEXT);
 334
 335   ::FillRect ((HDC) event.GetDC()->GetHDC(), &rect, hBrush);
 336   ::DeleteObject(hBrush);
 337   ::SetMapMode((HDC) event.GetDC()->GetHDC(), mode);
 338 }
 339
 340 void wxControl::SetClientSize (const int width, const int height)
 341 {
 342   SetSize (-1, -1, width, height);
 343 }
 344
 345 void wxControl::Centre (const int direction)
 346 {
 347   int x, y, width, height, panel_width, panel_height, new_x, new_y;
 348
 349   wxWindow *parent = (wxWindow *) GetParent ();
 350   if (!parent)
 351     return;
 352
 353   parent->GetClientSize (&panel_width, &panel_height);
 354   GetSize (&width, &height);
 355   GetPosition (&x, &y);
 356
 357   new_x = x;
 358   new_y = y;
 359
 360   if (direction & wxHORIZONTAL)
 361     new_x = (int) ((panel_width - width) / 2);
 362
 363   if (direction & wxVERTICAL)
 364     new_y = (int) ((panel_height - height) / 2);
 365
 366   SetSize (new_x, new_y, width, height);
 367   int temp_x, temp_y;
 368   GetPosition (&temp_x, &temp_y);
 369   GetPosition (&temp_x, &temp_y);
 370 }
 371
 372