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