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/app.h"
  17     #include "wx/button.h"
  18     #include "wx/brush.h"
  19     #include "wx/panel.h"
  20     #include "wx/bmpbuttn.h"
  21     #include "wx/settings.h"
  22     #include "wx/dcscreen.h"
  23     #include "wx/scrolwin.h"
  24 #endif
  25
  26 #include "wx/stockitem.h"
  27 #include "wx/os2/private.h"
  28
  29 #define BUTTON_HEIGHT_FROM_CHAR_HEIGHT(cy) (11*EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)/10)
  30
  31 //
  32 // Should be at the very least less than winDEFAULT_BUTTON_MARGIN
  33 //
  34 #define FOCUS_MARGIN 3
  35
  36 #ifndef BST_CHECKED
  37 #define BST_CHECKED 0x0001
  38 #endif
  39
  40 IMPLEMENT_DYNAMIC_CLASS(wxButton, wxControl)
  41
  42 // Button
  43
  44 bool wxButton::Create(
  45   wxWindow*                         pParent
  46 , wxWindowID                        vId
  47 , const wxString&                   rsLbl
  48 , const wxPoint&                    rPos
  49 , const wxSize&                     rSize
  50 , long                              lStyle
  51 , const wxValidator&                rValidator
  52 , const wxString&                   rsName
  53 )
  54 {
  55     wxString rsLabel(rsLbl);
  56     if (rsLabel.empty() && wxIsStockID(vId))
  57         rsLabel = wxGetStockLabel(vId);
  58
  59     wxString                        sLabel = ::wxPMTextToLabel(rsLabel);
  60
  61     SetName(rsName);
  62 #if wxUSE_VALIDATORS
  63     SetValidator(rValidator);
  64 #endif
  65     m_windowStyle = lStyle;
  66     pParent->AddChild((wxButton *)this);
  67     if (vId == -1)
  68         m_windowId = NewControlId();
  69     else
  70         m_windowId = vId;
  71     lStyle = WS_VISIBLE | WS_TABSTOP | BS_PUSHBUTTON;
  72
  73     //
  74     // OS/2 PM does not have Right/Left/Top/Bottom styles.
  75     // We will have to define an additional style when we implement notebooks
  76     // for a notebook page button
  77     //
  78     if (m_windowStyle & wxCLIP_SIBLINGS )
  79         lStyle |= WS_CLIPSIBLINGS;
  80
  81     m_hWnd = (WXHWND)::WinCreateWindow( GetHwndOf(pParent)   // Parent handle
  82                                        ,WC_BUTTON            // A Button class window
  83                                        ,(PSZ)sLabel.c_str()  // Button text
  84                                        ,lStyle               // Button style
  85                                        ,0, 0, 0, 0           // Location and size
  86                                        ,GetHwndOf(pParent)   // Owner handle
  87                                        ,HWND_TOP             // Top of Z-Order
  88                                        ,vId                  // Identifier
  89                                        ,NULL                 // No control data
  90                                        ,NULL                 // No Presentation parameters
  91                                       );
  92     if (m_hWnd == 0)
  93     {
  94         return FALSE;
  95     }
  96
  97     //
  98     // Subclass again for purposes of dialog editing mode
  99     //
 100     SubclassWin(m_hWnd);
 101     wxFont*                          pButtonFont = new wxFont( 8
 102                                                               ,wxSWISS
 103                                                               ,wxNORMAL
 104                                                               ,wxNORMAL
 105                                                              );
 106     SetFont(*pButtonFont);
 107     SetXComp(0);
 108     SetYComp(0);
 109     SetSize( rPos.x
 110             ,rPos.y
 111             ,rSize.x
 112             ,rSize.y
 113            );
 114     delete pButtonFont;
 115     return TRUE;
 116 } // end of wxButton::Create
 117
 118 wxButton::~wxButton()
 119 {
 120     wxPanel*                        pPanel = wxDynamicCast(GetParent(), wxPanel);
 121
 122     if (pPanel)
 123     {
 124         if (pPanel->GetDefaultItem() == this)
 125         {
 126             //
 127             // Don't leave the panel with invalid default item
 128             //
 129             pPanel->SetDefaultItem(NULL);
 130         }
 131     }
 132 } // end of wxButton::~wxButton
 133
 134 // ----------------------------------------------------------------------------
 135 // size management including autosizing
 136 // ----------------------------------------------------------------------------
 137
 138 wxSize wxButton::DoGetBestSize() const
 139 {
 140     wxString                        rsLabel = wxGetWindowText(GetHWND());
 141     int                             nWidthButton;
 142     int                             nWidthChar;
 143     int                             nHeightChar;
 144     wxFont                          vFont = (wxFont)GetFont();
 145
 146     GetTextExtent( rsLabel
 147                   ,&nWidthButton
 148                   ,NULL
 149                  );
 150
 151     wxGetCharSize( GetHWND()
 152                   ,&nWidthChar
 153                   ,&nHeightChar
 154                   ,&vFont
 155                  );
 156
 157     //
 158     // Add a margin - the button is wider than just its label
 159     //
 160     nWidthButton += 3 * nWidthChar;
 161
 162     //
 163     // The button height is proportional to the height of the font used
 164     //
 165     int                             nHeightButton = BUTTON_HEIGHT_FROM_CHAR_HEIGHT(nHeightChar);
 166
 167     //
 168     // Need a little extra to make it look right
 169     //
 170     nHeightButton += (int)(nHeightChar/1.5);
 171
 172     if (!HasFlag(wxBU_EXACTFIT))
 173     {
 174         wxSize                      vSize = GetDefaultSize();
 175
 176         if (nWidthButton > vSize.x)
 177             vSize.x = nWidthButton;
 178         if (nHeightButton > vSize.y)
 179             vSize.y = nHeightButton;
 180         return vSize;
 181     }
 182     return wxSize( nWidthButton
 183                   ,nHeightButton
 184                  );
 185 } // end of wxButton::DoGetBestSize
 186
 187 /* static */
 188 wxSize wxButton::GetDefaultSize()
 189 {
 190     static wxSize                   vSizeBtn;
 191
 192     if (vSizeBtn.x == 0)
 193     {
 194         wxScreenDC                  vDc;
 195
 196         vDc.SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 197
 198         //
 199         // The size of a standard button in the dialog units is 50x14,
 200         // translate this to pixels
 201         // NB1: the multipliers come from the Windows convention
 202         // NB2: the extra +1/+2 were needed to get the size be the same as the
 203         //      size of the buttons in the standard dialog - I don't know how
 204         //      this happens, but on my system this size is 75x23 in pixels and
 205         //      23*8 isn't even divisible by 14... Would be nice to understand
 206         //      why these constants are needed though!
 207         vSizeBtn.x = (50 * (vDc.GetCharWidth() + 1))/4;
 208         vSizeBtn.y = ((14 * vDc.GetCharHeight()) + 2)/8;
 209     }
 210     return vSizeBtn;
 211 } // end of wxButton::GetDefaultSize
 212
 213 void wxButton::Command (
 214   wxCommandEvent&                   rEvent
 215 )
 216 {
 217     ProcessCommand (rEvent);
 218 } // end of wxButton::Command
 219
 220 // ----------------------------------------------------------------------------
 221 // helpers
 222 // ----------------------------------------------------------------------------
 223
 224 bool wxButton::SendClickEvent()
 225 {
 226     wxCommandEvent                  vEvent( wxEVT_COMMAND_BUTTON_CLICKED
 227                                            ,GetId()
 228                                           );
 229
 230     vEvent.SetEventObject(this);
 231     return ProcessCommand(vEvent);
 232 } // end of wxButton::SendClickEvent
 233
 234 void wxButton::SetDefault()
 235 {
 236     wxWindow*                       pParent = GetParent();
 237
 238     wxCHECK_RET( pParent, _T("button without parent?") );
 239
 240     //
 241     // Set this one as the default button both for wxWidgets and Windows
 242     //
 243     wxWindow*                       pWinOldDefault = pParent->SetDefaultItem(this);
 244
 245     SetDefaultStyle( wxDynamicCast(pWinOldDefault, wxButton)
 246                     ,FALSE
 247                    );
 248     SetDefaultStyle( this
 249                     ,TRUE
 250                    );
 251 } // end of wxButton::SetDefault
 252
 253 void wxButton::SetTmpDefault()
 254 {
 255     wxWindow*                       pParent = GetParent();
 256
 257     wxCHECK_RET( pParent, _T("button without parent?") );
 258
 259     wxWindow*                       pWinOldDefault = pParent->GetDefaultItem();
 260
 261     pParent->SetTmpDefaultItem(this);
 262     SetDefaultStyle( wxDynamicCast(pWinOldDefault, wxButton)
 263                     ,FALSE
 264                    );
 265     SetDefaultStyle( this
 266                     ,TRUE
 267                    );
 268 } // end of wxButton::SetTmpDefault
 269
 270 void wxButton::UnsetTmpDefault()
 271 {
 272     wxWindow*                       pParent = GetParent();
 273
 274     wxCHECK_RET( pParent, _T("button without parent?") );
 275
 276     pParent->SetTmpDefaultItem(NULL);
 277
 278     wxWindow*                       pWinOldDefault = pParent->GetDefaultItem();
 279
 280     SetDefaultStyle( this
 281                     ,FALSE
 282                    );
 283     SetDefaultStyle( wxDynamicCast(pWinOldDefault, wxButton)
 284                     ,TRUE
 285                    );
 286 } // end of wxButton::UnsetTmpDefault
 287
 288 void wxButton::SetDefaultStyle(
 289   wxButton*                         pBtn
 290 , bool                              bOn
 291 )
 292 {
 293     long                            lStyle;
 294     //
 295     // We may be called with NULL pointer -- simpler to do the check here than
 296     // in the caller which does wxDynamicCast()
 297     //
 298     if (!pBtn)
 299         return;
 300
 301     //
 302     // First, let DefDlgProc() know about the new default button
 303     //
 304     if (bOn)
 305     {
 306         if (!wxTheApp->IsActive())
 307             return;
 308
 309         //
 310         // In OS/2 the dialog/panel doesn't really know it has a default
 311         // button, the default button simply has that style.  We'll just
 312         // simulate by setting focus to it
 313         //
 314         pBtn->SetFocus();
 315     }
 316     lStyle = ::WinQueryWindowULong(GetHwndOf(pBtn), QWL_STYLE);
 317     if (!(lStyle & BS_DEFAULT) == bOn)
 318     {
 319         if ((lStyle & BS_USERBUTTON) != BS_USERBUTTON)
 320         {
 321             if (bOn)
 322                 lStyle |= BS_DEFAULT;
 323             else
 324                 lStyle &= ~BS_DEFAULT;
 325             ::WinSetWindowULong(GetHwndOf(pBtn), QWL_STYLE, lStyle);
 326         }
 327         else
 328         {
 329             //
 330             // Redraw the button - it will notice itself that it's not the
 331             // default one any longer
 332             //
 333             pBtn->Refresh();
 334         }
 335     }
 336 } // end of wxButton::UpdateDefaultStyle
 337
 338 // ----------------------------------------------------------------------------
 339 // event/message handlers
 340 // ----------------------------------------------------------------------------
 341
 342 bool wxButton::OS2Command(
 343   WXUINT                            uParam
 344 , WXWORD                            wId
 345 )
 346 {
 347     bool                            bProcessed = FALSE;
 348
 349     switch (uParam)
 350     {
 351         case BN_CLICKED:            // normal buttons send this
 352         case BN_DBLCLICKED:         // owner-drawn ones also send this
 353             bProcessed = SendClickEvent();
 354             break;
 355     }
 356     return bProcessed;
 357 } // end of wxButton::OS2Command
 358
 359 WXHBRUSH wxButton::OnCtlColor(
 360   WXHDC                             pDC
 361 , WXHWND                            pWnd
 362 , WXUINT                            nCtlColor
 363 , WXUINT                            uMessage
 364 , WXWPARAM                          wParam
 365 , WXLPARAM                          lParam
 366 )
 367 {
 368     wxBrush*                        pBackgroundBrush = wxTheBrushList->FindOrCreateBrush( GetBackgroundColour()
 369                                                                                          ,wxSOLID
 370                                                                                         );
 371
 372     return (WXHBRUSH)pBackgroundBrush->GetResourceHandle();
 373 } // end of wxButton::OnCtlColor
 374
 375 void wxButton::MakeOwnerDrawn()
 376 {
 377     long                            lStyle = 0L;
 378
 379     lStyle = ::WinQueryWindowULong(GetHwnd(), QWL_STYLE);
 380     if ((lStyle & BS_USERBUTTON) != BS_USERBUTTON)
 381     {
 382         //
 383         // Make it so
 384         //
 385         lStyle |= BS_USERBUTTON;
 386         ::WinSetWindowULong(GetHwnd(), QWL_STYLE, lStyle);
 387     }
 388 } // end of wxButton::MakeOwnerDrawn
 389
 390 WXDWORD wxButton::OS2GetStyle(
 391   long                              lStyle
 392 , WXDWORD*                          pdwExstyle
 393 ) const
 394 {
 395     //
 396     // Buttons never have an external border, they draw their own one
 397     //
 398     WXDWORD                         dwStyle = wxControl::OS2GetStyle( (lStyle & ~wxBORDER_MASK) | wxBORDER_NONE
 399                                                                      ,pdwExstyle
 400                                                                     );
 401
 402     //
 403     // We must use WS_CLIPSIBLINGS with the buttons or they would draw over
 404     // each other in any resizeable dialog which has more than one button in
 405     // the bottom
 406     //
 407     dwStyle |= WS_CLIPSIBLINGS;
 408     return dwStyle;
 409 } // end of wxButton::OS2GetStyle
 410
 411 MRESULT wxButton::WindowProc(
 412   WXUINT                            uMsg
 413 , WXWPARAM                          wParam
 414 , WXLPARAM                          lParam
 415 )
 416 {
 417     //
 418     // When we receive focus, we want to temporary become the default button in
 419     // our parent panel so that pressing "Enter" would activate us -- and when
 420     // losing it we should restore the previous default button as well
 421     //
 422     if (uMsg == WM_SETFOCUS)
 423     {
 424         if (SHORT1FROMMP(lParam) == TRUE)
 425             SetTmpDefault();
 426         else
 427             UnsetTmpDefault();
 428
 429         //
 430         // Let the default processign take place too
 431         //
 432     }
 433
 434     else if (uMsg == WM_BUTTON1DBLCLK)
 435     {
 436         //
 437         // Emulate a click event to force an owner-drawn button to change its
 438         // appearance - without this, it won't do it
 439         //
 440         (void)wxControl::OS2WindowProc( WM_BUTTON1DOWN
 441                                        ,wParam
 442                                        ,lParam
 443                                       );
 444
 445         //
 446         // And conitnue with processing the message normally as well
 447         //
 448     }
 449
 450     //
 451     // Let the base class do all real processing
 452     //
 453     return (wxControl::OS2WindowProc( uMsg
 454                                      ,wParam
 455                                      ,lParam
 456                                     ));
 457 } // end of wxWindowProc
 458