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     wxButton*                       pBtnOldDefault = NULL;
 225     wxPanel*                        pPanel = wxDynamicCast(pParent, wxPanel);
 226     long                            lStyle = 0L;
 227
 228     if (pParent)
 229     {
 230         wxWindow*                   pWinOldDefault = pParent->SetDefaultItem(this);
 231
 232         pBtnOldDefault = wxDynamicCast(pWinOldDefault, wxButton);
 233     }
 234     if (pBtnOldDefault && pBtnOldDefault != this)
 235     {
 236         //
 237         // Remove the BS_DEFPUSHBUTTON style from the other button
 238         //
 239         lStyle = ::WinQueryWindowULong(GetHwndOf(pBtnOldDefault), QWL_STYLE);
 240
 241         //
 242         // Don't do it with the owner drawn buttons because it will reset
 243         // BS_OWNERDRAW style bit too (BS_OWNERDRAW & BS_DEFPUSHBUTTON != 0)!
 244         //
 245         if ((lStyle & BS_USERBUTTON) != BS_USERBUTTON)
 246         {
 247             lStyle &= ~BS_DEFAULT;
 248             ::WinSetWindowULong(GetHwndOf(pBtnOldDefault), QWL_STYLE, lStyle);
 249         }
 250         else
 251         {
 252             //
 253             // Redraw the button - it will notice itself that it's not the
 254             // default one any longer
 255             //
 256             pBtnOldDefault->Refresh();
 257         }
 258     }
 259
 260     //
 261     // Set this button as the default
 262     //
 263     lStyle = ::WinQueryWindowULong(GetHwnd(), QWL_STYLE);
 264     if ((lStyle & BS_USERBUTTON) != BS_USERBUTTON)
 265     {
 266         lStyle != BS_DEFAULT;
 267         ::WinSetWindowULong(GetHwnd(), QWL_STYLE, lStyle);
 268     }
 269 } // end of wxButton::SetDefault
 270
 271 // ----------------------------------------------------------------------------
 272 // event/message handlers
 273 // ----------------------------------------------------------------------------
 274
 275 bool wxButton::OS2Command(
 276   WXUINT                            uParam
 277 , WXWORD                            wId
 278 )
 279 {
 280     bool                            bProcessed = FALSE;
 281
 282     switch (uParam)
 283     {
 284         case BN_CLICKED:            // normal buttons send this
 285         case BN_DBLCLICKED:         // owner-drawn ones also send this
 286             bProcessed = SendClickEvent();
 287             break;
 288     }
 289     return bProcessed;
 290 } // end of wxButton::OS2Command
 291
 292 WXHBRUSH wxButton::OnCtlColor(
 293   WXHDC                             pDC
 294 , WXHWND                            pWnd
 295 , WXUINT                            nCtlColor
 296 , WXUINT                            uMessage
 297 , WXWPARAM                          wParam
 298 , WXLPARAM                          lParam
 299 )
 300 {
 301     wxBrush*                        pBackgroundBrush = wxTheBrushList->FindOrCreateBrush( GetBackgroundColour()
 302                                                                                          ,wxSOLID
 303                                                                                         );
 304
 305     return (WXHBRUSH)pBackgroundBrush->GetResourceHandle();
 306 } // end of wxButton::OnCtlColor
 307
 308 void wxButton::MakeOwnerDrawn()
 309 {
 310     long                            lStyle = 0L;
 311
 312     lStyle = ::WinQueryWindowULong(GetHwnd(), QWL_STYLE);
 313     if ((lStyle & BS_USERBUTTON) != BS_USERBUTTON)
 314     {
 315         //
 316         // Make it so
 317         //
 318         lStyle |= BS_USERBUTTON;
 319         ::WinSetWindowULong(GetHwnd(), QWL_STYLE, lStyle);
 320     }
 321 } // end of wxButton::MakeOwnerDrawn
 322
 323 WXDWORD wxButton::OS2GetStyle(
 324   long                              lStyle
 325 , WXDWORD*                          pdwExstyle
 326 ) const
 327 {
 328     //
 329     // Buttons never have an external border, they draw their own one
 330     //
 331     WXDWORD                         dwStyle = wxControl::OS2GetStyle( (lStyle & ~wxBORDER_MASK) | wxBORDER_NONE
 332                                                                      ,pdwExstyle
 333                                                                     );
 334
 335     //
 336     // We must use WS_CLIPSIBLINGS with the buttons or they would draw over
 337     // each other in any resizeable dialog which has more than one button in
 338     // the bottom
 339     //
 340     dwStyle |= WS_CLIPSIBLINGS;
 341     return dwStyle;
 342 } // end of wxButton::OS2GetStyle
 343
 344 MRESULT wxButton::WindowProc(
 345   WXUINT                            uMsg
 346 , WXWPARAM                          wParam
 347 , WXLPARAM                          lParam
 348 )
 349 {
 350     //
 351     // When we receive focus, we want to become the default button in our
 352     // parent panel
 353     //
 354     if (uMsg == WM_SETFOCUS)
 355     {
 356         SetDefault();
 357
 358         //
 359         // Let the default processign take place too
 360         //
 361     }
 362
 363     else if (uMsg == WM_BUTTON1DBLCLK)
 364     {
 365         //
 366         // Emulate a click event to force an owner-drawn button to change its
 367         // appearance - without this, it won't do it
 368         //
 369         (void)wxControl::OS2WindowProc( WM_BUTTON1DOWN
 370                                        ,wParam
 371                                        ,lParam
 372                                       );
 373
 374         //
 375         // And conitnue with processing the message normally as well
 376         //
 377     }
 378
 379     //
 380     // Let the base class do all real processing
 381     //
 382     return (wxControl::OS2WindowProc( uMsg
 383                                      ,wParam
 384                                      ,lParam
 385                                     ));
 386 } // end of wxWindowProc
 387