src/os2/button.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        button.cpp
   3 // Purpose:     wxButton
   4 // Author:      David Webster
   5 // Modified by:
   6 // Created:     10/13/99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) David Webster
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifndef WX_PRECOMP
  16     #include "wx/button.h"
  17     #include "wx/brush.h"
  18     #include "wx/panel.h"
  19     #include "wx/bmpbuttn.h"
  20     #include "wx/settings.h"
  21     #include "wx/dcscreen.h"
  22     #include "wx/scrolwin.h"
  23 #endif
  24
  25 #include "wx/os2/private.h"
  26
  27 #define BUTTON_HEIGHT_FROM_CHAR_HEIGHT(cy) (11*EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)/10)
  28
  29 //
  30 // Should be at the very least less than winDEFAULT_BUTTON_MARGIN
  31 //
  32 #define FOCUS_MARGIN 3
  33
  34 #ifndef BST_CHECKED
  35 #define BST_CHECKED 0x0001
  36 #endif
  37
  38 IMPLEMENT_DYNAMIC_CLASS(wxButton, wxControl)
  39
  40 // Button
  41
  42 bool wxButton::Create(
  43   wxWindow*                         pParent
  44 , wxWindowID                        vId
  45 , const wxString&                   rsLabel
  46 , const wxPoint&                    rPos
  47 , const wxSize&                     rSize
  48 , long                              lStyle
  49 #if wxUSE_VALIDATORS
  50 , const wxValidator&                rValidator
  51 #endif
  52 , const wxString&                   rsName
  53 )
  54 {
  55     SetName(rsName);
  56 #if wxUSE_VALIDATORS
  57     SetValidator(rValidator);
  58 #endif
  59     m_windowStyle = lStyle;
  60     pParent->AddChild((wxButton *)this);
  61     if (vId == -1)
  62         m_windowId = NewControlId();
  63     else
  64         m_windowId = vId;
  65     lStyle = WS_VISIBLE | WS_TABSTOP | BS_PUSHBUTTON;
  66
  67     //
  68     // OS/2 PM does not have Right/Left/Top/Bottom styles.
  69     // We will have to define an additional style when we implement notebooks
  70     // for a notebook page button
  71     //
  72     if (m_windowStyle & wxCLIP_SIBLINGS )
  73         lStyle |= WS_CLIPSIBLINGS;
  74
  75     m_hWnd = (WXHWND)::WinCreateWindow( GetHwndOf(pParent)   // Parent handle
  76                                        ,WC_BUTTON            // A Button class window
  77                                        ,(PSZ)rsLabel.c_str() // Button text
  78                                        ,lStyle               // Button style
  79                                        ,0, 0, 0, 0           // Location and size
  80                                        ,GetHwndOf(pParent)   // Owner handle
  81                                        ,HWND_TOP             // Top of Z-Order
  82                                        ,vId                  // Identifier
  83                                        ,NULL                 // No control data
  84                                        ,NULL                 // No Presentation parameters
  85                                       );
  86     if (m_hWnd == 0)
  87     {
  88         return FALSE;
  89     }
  90
  91     //
  92     // Subclass again for purposes of dialog editing mode
  93     //
  94     SubclassWin(m_hWnd);
  95     wxFont*                          pButtonFont = new wxFont( 8
  96                                                               ,wxSWISS
  97                                                               ,wxNORMAL
  98                                                               ,wxNORMAL
  99                                                              );
 100     SetFont(*pButtonFont);
 101     SetXComp(0);
 102     SetYComp(0);
 103     SetSize( rPos.x
 104             ,rPos.y
 105             ,rSize.x
 106             ,rSize.y
 107            );
 108     delete pButtonFont;
 109     return TRUE;
 110 } // end of wxButton::Create
 111
 112 wxButton::~wxButton()
 113 {
 114     wxPanel*                        pPanel = wxDynamicCast(GetParent(), wxPanel);
 115
 116     if (pPanel)
 117     {
 118         if (pPanel->GetDefaultItem() == this)
 119         {
 120             //
 121             // Don't leave the panel with invalid default item
 122             //
 123             pPanel->SetDefaultItem(NULL);
 124         }
 125     }
 126 } // end of wxButton::~wxButton
 127
 128 // ----------------------------------------------------------------------------
 129 // size management including autosizing
 130 // ----------------------------------------------------------------------------
 131
 132 wxSize wxButton::DoGetBestSize() const
 133 {
 134     wxString                        rsLabel = wxGetWindowText(GetHWND());
 135     int                             nWidthButton;
 136     int                             nWidthChar;
 137     int                             nHeightChar;
 138
 139     GetTextExtent( rsLabel
 140                   ,&nWidthButton
 141                   ,NULL
 142                  );
 143
 144     wxGetCharSize( GetHWND()
 145                   ,&nWidthChar
 146                   ,&nHeightChar
 147                   ,(wxFont*)&GetFont()
 148                  );
 149
 150     //
 151     // Add a margin - the button is wider than just its label
 152     //
 153     nWidthButton += 3 * nWidthChar;
 154
 155     //
 156     // The button height is proportional to the height of the font used
 157     //
 158     int                             nHeightButton = BUTTON_HEIGHT_FROM_CHAR_HEIGHT(nHeightChar);
 159
 160     //
 161     // Need a little extra to make it look right
 162     //
 163     nHeightButton += nHeightChar/1.5;
 164
 165     wxSize                          vSize = GetDefaultSize();
 166
 167     if (nWidthButton > vSize.x)
 168         vSize.x = nWidthButton;
 169     if (nHeightButton > vSize.y)
 170         vSize.y = nHeightButton;
 171     return vSize;
 172 } // end of wxButton::DoGetBestSize
 173
 174 /* static */
 175 wxSize wxButton::GetDefaultSize()
 176 {
 177     static wxSize                   vSizeBtn;
 178
 179     if (vSizeBtn.x == 0)
 180     {
 181         wxScreenDC                  vDc;
 182
 183         vDc.SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 184
 185         //
 186         // The size of a standard button in the dialog units is 50x14,
 187         // translate this to pixels
 188         // NB1: the multipliers come from the Windows convention
 189         // NB2: the extra +1/+2 were needed to get the size be the same as the
 190         //      size of the buttons in the standard dialog - I don't know how
 191         //      this happens, but on my system this size is 75x23 in pixels and
 192         //      23*8 isn't even divisible by 14... Would be nice to understand
 193         //      why these constants are needed though!
 194         vSizeBtn.x = (50 * (vDc.GetCharWidth() + 1))/4;
 195         vSizeBtn.y = ((14 * vDc.GetCharHeight()) + 2)/8;
 196     }
 197     return vSizeBtn;
 198 } // end of wxButton::GetDefaultSize
 199
 200 void wxButton::Command (
 201   wxCommandEvent&                   rEvent
 202 )
 203 {
 204     ProcessCommand (rEvent);
 205 } // end of wxButton::Command
 206
 207 // ----------------------------------------------------------------------------
 208 // helpers
 209 // ----------------------------------------------------------------------------
 210
 211 bool wxButton::SendClickEvent()
 212 {
 213     wxCommandEvent                  vEvent( wxEVT_COMMAND_BUTTON_CLICKED
 214                                            ,GetId()
 215                                           );
 216
 217     vEvent.SetEventObject(this);
 218     return ProcessCommand(vEvent);
 219 } // end of wxButton::SendClickEvent
 220
 221 void wxButton::SetDefault()
 222 {
 223     wxWindow*                       pParent = GetParent();
 224
 225     wxCHECK_RET( pParent, _T("button without parent?") );
 226
 227     //
 228     // Set this one as the default button both for wxWindows and Windows
 229     //
 230     wxWindow*                       pWinOldDefault = pParent->SetDefaultItem(this);
 231     UpdateDefaultStyle( this
 232                        ,pWinOldDefault
 233                       );
 234 } // end of wxButton::SetDefault
 235
 236 void wxButton::SetTmpDefault()
 237 {
 238     wxWindow*                       pParent = GetParent();
 239
 240     wxCHECK_RET( pParent, _T("button without parent?") );
 241
 242     wxWindow*                       pWinOldDefault = pParent->GetDefaultItem();
 243     pParent->SetTmpDefaultItem(this);
 244     if (pWinOldDefault != this)
 245     {
 246         UpdateDefaultStyle( this
 247                            ,pWinOldDefault
 248                           );
 249     }
 250     //else: no styles to update
 251 } // end of wxButton::SetTmpDefault
 252
 253 void wxButton::UnsetTmpDefault()
 254 {
 255     wxWindow*                       pParent = GetParent();
 256
 257     wxCHECK_RET( pParent, _T("button without parent?") );
 258
 259     pParent->SetTmpDefaultItem(NULL);
 260
 261     wxWindow*                       pWinOldDefault = pParent->GetDefaultItem();
 262
 263     if (pWinOldDefault != this)
 264     {
 265         UpdateDefaultStyle( pWinOldDefault
 266                            ,this
 267                           );
 268     }
 269     //else: we had been default before anyhow
 270 } // end of wxButton::UnsetTmpDefault
 271
 272 void wxButton::UpdateDefaultStyle(
 273   wxWindow*                         pWinDefault
 274 , wxWindow*                         pWinOldDefault)
 275 {
 276     wxButton*                       pBtnOldDefault = wxDynamicCast(pWinOldDefault, wxButton);
 277     long                            lStyle;
 278
 279     if ( pBtnOldDefault && pBtnOldDefault != pWinDefault )
 280     {
 281         lStyle = ::WinQueryWindowULong(GetHwndOf(pBtnOldDefault), QWL_STYLE);
 282         if ((lStyle & BS_USERBUTTON) != BS_USERBUTTON)
 283         {
 284             lStyle &= ~BS_DEFAULT;
 285             ::WinSetWindowULong(GetHwndOf(pBtnOldDefault), QWL_STYLE, lStyle);
 286         }
 287         else
 288         {
 289             // redraw the button - it will notice itself that it's not the
 290             // default one any longer
 291             pBtnOldDefault->Refresh();
 292         }
 293     }
 294
 295     wxButton*                       pBtnDefault = wxDynamicCast(pWinDefault, wxButton);
 296
 297     if (pBtnDefault)
 298     {
 299         lStyle = ::WinQueryWindowULong(GetHwndOf(pBtnDefault), QWL_STYLE);
 300         if ((lStyle & BS_USERBUTTON) != BS_USERBUTTON)
 301         {
 302             lStyle != BS_DEFAULT;
 303             ::WinSetWindowULong(GetHwndOf(pBtnDefault), QWL_STYLE, lStyle);
 304         }
 305     }
 306 } // end of wxButton::UpdateDefaultStyle
 307
 308 // ----------------------------------------------------------------------------
 309 // event/message handlers
 310 // ----------------------------------------------------------------------------
 311
 312 bool wxButton::OS2Command(
 313   WXUINT                            uParam
 314 , WXWORD                            wId
 315 )
 316 {
 317     bool                            bProcessed = FALSE;
 318
 319     switch (uParam)
 320     {
 321         case BN_CLICKED:            // normal buttons send this
 322         case BN_DBLCLICKED:         // owner-drawn ones also send this
 323             bProcessed = SendClickEvent();
 324             break;
 325     }
 326     return bProcessed;
 327 } // end of wxButton::OS2Command
 328
 329 WXHBRUSH wxButton::OnCtlColor(
 330   WXHDC                             pDC
 331 , WXHWND                            pWnd
 332 , WXUINT                            nCtlColor
 333 , WXUINT                            uMessage
 334 , WXWPARAM                          wParam
 335 , WXLPARAM                          lParam
 336 )
 337 {
 338     wxBrush*                        pBackgroundBrush = wxTheBrushList->FindOrCreateBrush( GetBackgroundColour()
 339                                                                                          ,wxSOLID
 340                                                                                         );
 341
 342     return (WXHBRUSH)pBackgroundBrush->GetResourceHandle();
 343 } // end of wxButton::OnCtlColor
 344
 345 void wxButton::MakeOwnerDrawn()
 346 {
 347     long                            lStyle = 0L;
 348
 349     lStyle = ::WinQueryWindowULong(GetHwnd(), QWL_STYLE);
 350     if ((lStyle & BS_USERBUTTON) != BS_USERBUTTON)
 351     {
 352         //
 353         // Make it so
 354         //
 355         lStyle |= BS_USERBUTTON;
 356         ::WinSetWindowULong(GetHwnd(), QWL_STYLE, lStyle);
 357     }
 358 } // end of wxButton::MakeOwnerDrawn
 359
 360 WXDWORD wxButton::OS2GetStyle(
 361   long                              lStyle
 362 , WXDWORD*                          pdwExstyle
 363 ) const
 364 {
 365     //
 366     // Buttons never have an external border, they draw their own one
 367     //
 368     WXDWORD                         dwStyle = wxControl::OS2GetStyle( (lStyle & ~wxBORDER_MASK) | wxBORDER_NONE
 369                                                                      ,pdwExstyle
 370                                                                     );
 371
 372     //
 373     // We must use WS_CLIPSIBLINGS with the buttons or they would draw over
 374     // each other in any resizeable dialog which has more than one button in
 375     // the bottom
 376     //
 377     dwStyle |= WS_CLIPSIBLINGS;
 378     return dwStyle;
 379 } // end of wxButton::OS2GetStyle
 380
 381 MRESULT wxButton::WindowProc(
 382   WXUINT                            uMsg
 383 , WXWPARAM                          wParam
 384 , WXLPARAM                          lParam
 385 )
 386 {
 387     //
 388     // When we receive focus, we want to temporary become the default button in
 389     // our parent panel so that pressing "Enter" would activate us -- and when
 390     // losing it we should restore the previous default button as well
 391     //
 392     if (uMsg == WM_SETFOCUS)
 393     {
 394         if (SHORT1FROMMP(lParam) == TRUE)
 395             SetTmpDefault();
 396         else
 397             UnsetTmpDefault();
 398
 399         //
 400         // Let the default processign take place too
 401         //
 402     }
 403
 404     else if (uMsg == WM_BUTTON1DBLCLK)
 405     {
 406         //
 407         // Emulate a click event to force an owner-drawn button to change its
 408         // appearance - without this, it won't do it
 409         //
 410         (void)wxControl::OS2WindowProc( WM_BUTTON1DOWN
 411                                        ,wParam
 412                                        ,lParam
 413                                       );
 414
 415         //
 416         // And conitnue with processing the message normally as well
 417         //
 418     }
 419
 420     //
 421     // Let the base class do all real processing
 422     //
 423     return (wxControl::OS2WindowProc( uMsg
 424                                      ,wParam
 425                                      ,lParam
 426                                     ));
 427 } // end of wxWindowProc
 428