src/motif/utils.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/motif/utils.cpp
   3 // Purpose:     Various utilities
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     17/09/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #include "wx/utils.h"
  24
  25 #ifndef WX_PRECOMP
  26     #include "wx/app.h"
  27     #include "wx/dcmemory.h"
  28     #include "wx/bitmap.h"
  29 #endif
  30
  31 #include "wx/apptrait.h"
  32 #include "wx/evtloop.h"
  33 #include "wx/motif/private/timer.h"
  34
  35 #include <string.h>
  36
  37 #if (defined(__SUNCC__) || defined(__CLCC__))
  38     #include <sysent.h>
  39 #endif
  40
  41 #ifdef __VMS__
  42 #pragma message disable nosimpint
  43 #endif
  44
  45 #include "wx/unix/execute.h"
  46
  47 #include <Xm/Xm.h>
  48 #include <Xm/Frame.h>
  49
  50 #include "wx/motif/private.h"
  51
  52 #include "X11/Xutil.h"
  53
  54 #ifdef __VMS__
  55 #pragma message enable nosimpint
  56 #endif
  57
  58
  59 // ============================================================================
  60 // implementation
  61 // ============================================================================
  62
  63 // ----------------------------------------------------------------------------
  64 // async event processing
  65 // ----------------------------------------------------------------------------
  66
  67 // Consume all events until no more left
  68 void wxFlushEvents(WXDisplay* wxdisplay)
  69 {
  70     Display *display = (Display*)wxdisplay;
  71     wxEventLoop evtLoop;
  72
  73     XSync (display, False);
  74
  75     while (evtLoop.Pending())
  76     {
  77         XFlush (display);
  78         evtLoop.Dispatch();
  79     }
  80 }
  81
  82 // ----------------------------------------------------------------------------
  83 // wxExecute stuff
  84 // ----------------------------------------------------------------------------
  85
  86 static void xt_notify_end_process(XtPointer data, int *WXUNUSED(fid),
  87                                   XtInputId *id)
  88 {
  89     wxEndProcessData *proc_data = (wxEndProcessData *)data;
  90
  91     wxHandleProcessTermination(proc_data);
  92
  93     // VZ: I think they should be the same...
  94     wxASSERT( (int)*id == proc_data->tag );
  95
  96     XtRemoveInput(*id);
  97 }
  98
  99 int wxGUIAppTraits::AddProcessCallback(wxEndProcessData *proc_data, int fd)
 100 {
 101     XtInputId id = XtAppAddInput((XtAppContext) wxTheApp->GetAppContext(),
 102                                  fd,
 103                                  (XtPointer *) XtInputReadMask,
 104                                  (XtInputCallbackProc) xt_notify_end_process,
 105                                  (XtPointer) proc_data);
 106
 107     return (int)id;
 108 }
 109
 110 // ----------------------------------------------------------------------------
 111 // misc
 112 // ----------------------------------------------------------------------------
 113
 114 // Emit a beeeeeep
 115 #ifndef __EMX__
 116 // on OS/2, we use the wxBell from wxBase library (src/os2/utils.cpp)
 117 void wxBell()
 118 {
 119     // Use current setting for the bell
 120     XBell (wxGlobalDisplay(), 0);
 121 }
 122 #endif
 123
 124 wxPortId wxGUIAppTraits::GetToolkitVersion(int *verMaj, int *verMin) const
 125 {
 126     // XmVERSION and XmREVISION are defined in Xm/Xm.h
 127     if ( verMaj )
 128         *verMaj = XmVERSION;
 129     if ( verMin )
 130         *verMin = XmREVISION;
 131
 132     return wxPORT_MOTIF;
 133 }
 134
 135 wxEventLoopBase* wxGUIAppTraits::CreateEventLoop()
 136 {
 137     return new wxEventLoop;
 138 }
 139
 140 wxTimerImpl* wxGUIAppTraits::CreateTimerImpl(wxTimer* timer)
 141 {
 142     return new wxMotifTimerImpl(timer);
 143 }
 144
 145 // ----------------------------------------------------------------------------
 146 // display info
 147 // ----------------------------------------------------------------------------
 148
 149 void wxGetMousePosition( int* x, int* y )
 150 {
 151 #if wxUSE_NANOX
 152     // TODO
 153     *x = 0;
 154     *y = 0;
 155 #else
 156     XMotionEvent xev;
 157     Window root, child;
 158     XQueryPointer(wxGlobalDisplay(),
 159                   DefaultRootWindow(wxGlobalDisplay()),
 160                   &root, &child,
 161                   &(xev.x_root), &(xev.y_root),
 162                   &(xev.x),      &(xev.y),
 163                   &(xev.state));
 164     *x = xev.x_root;
 165     *y = xev.y_root;
 166 #endif
 167 }
 168
 169 // Return true if we have a colour display
 170 bool wxColourDisplay()
 171 {
 172     return wxDisplayDepth() > 1;
 173 }
 174
 175 // Returns depth of screen
 176 int wxDisplayDepth()
 177 {
 178     Display *dpy = wxGlobalDisplay();
 179
 180     return DefaultDepth (dpy, DefaultScreen (dpy));
 181 }
 182
 183 // Get size of display
 184 void wxDisplaySize(int *width, int *height)
 185 {
 186     Display *dpy = wxGlobalDisplay();
 187
 188     if ( width )
 189         *width = DisplayWidth (dpy, DefaultScreen (dpy));
 190     if ( height )
 191         *height = DisplayHeight (dpy, DefaultScreen (dpy));
 192 }
 193
 194 void wxDisplaySizeMM(int *width, int *height)
 195 {
 196     Display *dpy = wxGlobalDisplay();
 197
 198     if ( width )
 199         *width = DisplayWidthMM(dpy, DefaultScreen (dpy));
 200     if ( height )
 201         *height = DisplayHeightMM(dpy, DefaultScreen (dpy));
 202 }
 203
 204 // Configurable display in wxX11 and wxMotif
 205 static WXDisplay *gs_currentDisplay = NULL;
 206 static wxString gs_displayName;
 207
 208 WXDisplay *wxGetDisplay()
 209 {
 210     if (gs_currentDisplay)
 211         return gs_currentDisplay;
 212     else if (wxTheApp)
 213         return wxTheApp->GetInitialDisplay();
 214     return NULL;
 215 }
 216
 217 bool wxSetDisplay(const wxString& display_name)
 218 {
 219     gs_displayName = display_name;
 220
 221     if ( display_name.empty() )
 222     {
 223         gs_currentDisplay = NULL;
 224
 225         return true;
 226     }
 227     else
 228     {
 229         Cardinal argc = 0;
 230
 231         Display *display = XtOpenDisplay((XtAppContext) wxTheApp->GetAppContext(),
 232             display_name.c_str(),
 233             wxTheApp->GetAppName().c_str(),
 234             wxTheApp->GetClassName().c_str(),
 235             NULL,
 236 #if XtSpecificationRelease < 5
 237             0, &argc,
 238 #else
 239             0, (int *)&argc,
 240 #endif
 241             NULL);
 242
 243         if (display)
 244         {
 245             gs_currentDisplay = (WXDisplay*) display;
 246             return true;
 247         }
 248         else
 249             return false;
 250     }
 251 }
 252
 253 wxString wxGetDisplayName()
 254 {
 255     return gs_displayName;
 256 }
 257
 258 wxWindow* wxFindWindowAtPoint(const wxPoint& pt)
 259 {
 260     return wxGenericFindWindowAtPoint(pt);
 261 }
 262
 263 // ----------------------------------------------------------------------------
 264 // Some colour manipulation routines
 265 // ----------------------------------------------------------------------------
 266
 267 void wxHSVToXColor(wxHSV *hsv,XColor *rgb)
 268 {
 269     int h = hsv->h;
 270     int s = hsv->s;
 271     int v = hsv->v;
 272     int r = 0, g = 0, b = 0;
 273     int i, f;
 274     int p, q, t;
 275     s = (s * wxMAX_RGB) / wxMAX_SV;
 276     v = (v * wxMAX_RGB) / wxMAX_SV;
 277     if (h == 360) h = 0;
 278     if (s == 0) { h = 0; r = g = b = v; }
 279     i = h / 60;
 280     f = h % 60;
 281     p = v * (wxMAX_RGB - s) / wxMAX_RGB;
 282     q = v * (wxMAX_RGB - s * f / 60) / wxMAX_RGB;
 283     t = v * (wxMAX_RGB - s * (60 - f) / 60) / wxMAX_RGB;
 284     switch (i)
 285     {
 286     case 0: r = v, g = t, b = p; break;
 287     case 1: r = q, g = v, b = p; break;
 288     case 2: r = p, g = v, b = t; break;
 289     case 3: r = p, g = q, b = v; break;
 290     case 4: r = t, g = p, b = v; break;
 291     case 5: r = v, g = p, b = q; break;
 292     }
 293     rgb->red = (unsigned short)(r << 8);
 294     rgb->green = (unsigned short)(g << 8);
 295     rgb->blue = (unsigned short)(b << 8);
 296 }
 297
 298 void wxXColorToHSV(wxHSV *hsv,XColor *rgb)
 299 {
 300     int r = rgb->red >> 8;
 301     int g = rgb->green >> 8;
 302     int b = rgb->blue >> 8;
 303     int maxv = wxMax3(r, g, b);
 304     int minv = wxMin3(r, g, b);
 305     int h = 0, s, v;
 306     v = maxv;
 307     if (maxv) s = (maxv - minv) * wxMAX_RGB / maxv;
 308     else s = 0;
 309     if (s == 0) h = 0;
 310     else
 311     {
 312         int rc, gc, bc, hex = 0;
 313         rc = (maxv - r) * wxMAX_RGB / (maxv - minv);
 314         gc = (maxv - g) * wxMAX_RGB / (maxv - minv);
 315         bc = (maxv - b) * wxMAX_RGB / (maxv - minv);
 316         if (r == maxv) { h = bc - gc, hex = 0; }
 317         else if (g == maxv) { h = rc - bc, hex = 2; }
 318         else if (b == maxv) { h = gc - rc, hex = 4; }
 319         h = hex * 60 + (h * 60 / wxMAX_RGB);
 320         if (h < 0) h += 360;
 321     }
 322     hsv->h = h;
 323     hsv->s = (s * wxMAX_SV) / wxMAX_RGB;
 324     hsv->v = (v * wxMAX_SV) / wxMAX_RGB;
 325 }
 326
 327 void wxAllocNearestColor(Display *d,Colormap cmp,XColor *xc)
 328 {
 329 #if !wxUSE_NANOX
 330     int llp;
 331
 332     int screen = DefaultScreen(d);
 333     int num_colors = DisplayCells(d,screen);
 334
 335     XColor *color_defs = new XColor[num_colors];
 336     for(llp = 0;llp < num_colors;llp++) color_defs[llp].pixel = llp;
 337     XQueryColors(d,cmp,color_defs,num_colors);
 338
 339     wxHSV hsv_defs, hsv;
 340     wxXColorToHSV(&hsv,xc);
 341
 342     int diff, min_diff = 0, pixel = 0;
 343
 344     for(llp = 0;llp < num_colors;llp++)
 345     {
 346         wxXColorToHSV(&hsv_defs,&color_defs[llp]);
 347         diff = wxSIGN(wxH_WEIGHT * (hsv.h - hsv_defs.h)) +
 348             wxSIGN(wxS_WEIGHT * (hsv.s - hsv_defs.s)) +
 349             wxSIGN(wxV_WEIGHT * (hsv.v - hsv_defs.v));
 350         if (llp == 0) min_diff = diff;
 351         if (min_diff > diff) { min_diff = diff; pixel = llp; }
 352         if (min_diff == 0) break;
 353     }
 354
 355     xc -> red = color_defs[pixel].red;
 356     xc -> green = color_defs[pixel].green;
 357     xc -> blue = color_defs[pixel].blue;
 358     xc -> flags = DoRed | DoGreen | DoBlue;
 359
 360 /*  FIXME, TODO
 361     if (!XAllocColor(d,cmp,xc))
 362         cout << "wxAllocNearestColor : Warning : Cannot find nearest color !\n";
 363 */
 364
 365     delete[] color_defs;
 366 #endif
 367 }
 368
 369 void wxAllocColor(Display *d,Colormap cmp,XColor *xc)
 370 {
 371     if (!XAllocColor(d,cmp,xc))
 372     {
 373         //          cout << "wxAllocColor : Warning : cannot allocate color, attempt find nearest !\n";
 374         wxAllocNearestColor(d,cmp,xc);
 375     }
 376 }
 377
 378 wxString wxGetXEventName(XEvent& event)
 379 {
 380 #if wxUSE_NANOX
 381     wxString str(wxT("(some event)"));
 382     return str;
 383 #else
 384     int type = event.xany.type;
 385     static char* event_name[] = {
 386         wxMOTIF_STR(""), wxMOTIF_STR("unknown(-)"),                                         // 0-1
 387         wxMOTIF_STR("KeyPress"), wxMOTIF_STR("KeyRelease"), wxMOTIF_STR("ButtonPress"), wxMOTIF_STR("ButtonRelease"), // 2-5
 388         wxMOTIF_STR("MotionNotify"), wxMOTIF_STR("EnterNotify"), wxMOTIF_STR("LeaveNotify"), wxMOTIF_STR("FocusIn"),  // 6-9
 389         wxMOTIF_STR("FocusOut"), wxMOTIF_STR("KeymapNotify"), wxMOTIF_STR("Expose"), wxMOTIF_STR("GraphicsExpose"),   // 10-13
 390         wxMOTIF_STR("NoExpose"), wxMOTIF_STR("VisibilityNotify"), wxMOTIF_STR("CreateNotify"),           // 14-16
 391         wxMOTIF_STR("DestroyNotify"), wxMOTIF_STR("UnmapNotify"), wxMOTIF_STR("MapNotify"), wxMOTIF_STR("MapRequest"),// 17-20
 392         wxMOTIF_STR("ReparentNotify"), wxMOTIF_STR("ConfigureNotify"), wxMOTIF_STR("ConfigureRequest"),  // 21-23
 393         wxMOTIF_STR("GravityNotify"), wxMOTIF_STR("ResizeRequest"), wxMOTIF_STR("CirculateNotify"),      // 24-26
 394         wxMOTIF_STR("CirculateRequest"), wxMOTIF_STR("PropertyNotify"), wxMOTIF_STR("SelectionClear"),   // 27-29
 395         wxMOTIF_STR("SelectionRequest"), wxMOTIF_STR("SelectionNotify"), wxMOTIF_STR("ColormapNotify"),  // 30-32
 396         wxMOTIF_STR("ClientMessage"), wxMOTIF_STR("MappingNotify"),                         // 33-34
 397         wxMOTIF_STR("unknown(+)")};                                            // 35
 398     type = wxMin(35, type); type = wxMax(1, type);
 399     wxString str(event_name[type]);
 400     return str;
 401 #endif
 402 }
 403
 404 // ----------------------------------------------------------------------------
 405 // accelerators
 406 // ----------------------------------------------------------------------------
 407
 408 // Find the letter corresponding to the mnemonic, for Motif
 409 char wxFindMnemonic (const char *s)
 410 {
 411     char mnem = 0;
 412     int len = strlen (s);
 413     int i;
 414
 415     for (i = 0; i < len; i++)
 416     {
 417         if (s[i] == '&')
 418         {
 419             // Carefully handle &&
 420             if ((i + 1) <= len && s[i + 1] == '&')
 421                 i++;
 422             else
 423             {
 424                 mnem = s[i + 1];
 425                 break;
 426             }
 427         }
 428     }
 429     return mnem;
 430 }
 431
 432 char* wxFindAccelerator( const char *s )
 433 {
 434 #if 1
 435     wxUnusedVar(s);
 436     // VZ: this function returns incorrect keysym which completely breaks kbd
 437     //     handling
 438     return NULL;
 439 #else
 440     // The accelerator text is after the \t char.
 441     s = strchr( s, '\t' );
 442
 443     if( !s ) return NULL;
 444
 445     /*
 446     Now we need to format it as X standard:
 447
 448       input            output
 449
 450         F7           --> <Key>F7
 451         Ctrl+N       --> Ctrl<Key>N
 452         Alt+k        --> Meta<Key>k
 453         Ctrl+Shift+A --> Ctrl Shift<Key>A
 454
 455         and handle Ctrl-N & similia
 456     */
 457
 458     static char buf[256];
 459
 460     buf[0] = '\0';
 461     wxString tmp = s + 1; // skip TAB
 462     size_t index = 0;
 463
 464     while( index < tmp.length() )
 465     {
 466         size_t plus  = tmp.find( '+', index );
 467         size_t minus = tmp.find( '-', index );
 468
 469         // neither '+' nor '-', add <Key>
 470         if( plus == wxString::npos && minus == wxString::npos )
 471         {
 472             strcat( buf, "<Key>" );
 473             strcat( buf, tmp.c_str() + index );
 474
 475             return buf;
 476         }
 477
 478         // OK: npos is big and positive
 479         size_t sep = wxMin( plus, minus );
 480         wxString mod = tmp.substr( index, sep - index );
 481
 482         // Ctrl  -> Ctrl
 483         // Shift -> Shift
 484         // Alt   -> Meta
 485         if( mod == "Alt" )
 486             mod = "Meta";
 487
 488         if( buf[0] )
 489             strcat( buf, " " );
 490
 491         strcat( buf, mod.c_str() );
 492
 493         index = sep + 1;
 494     }
 495
 496     return NULL;
 497 #endif
 498 }
 499
 500 XmString wxFindAcceleratorText (const char *s)
 501 {
 502 #if 1
 503     wxUnusedVar(s);
 504     // VZ: this function returns incorrect keysym which completely breaks kbd
 505     //     handling
 506     return NULL;
 507 #else
 508     // The accelerator text is after the \t char.
 509     s = strchr( s, '\t' );
 510
 511     if( !s ) return NULL;
 512
 513     return wxStringToXmString( s + 1 ); // skip TAB!
 514 #endif
 515 }
 516
 517 // Change a widget's foreground and background colours.
 518 void wxDoChangeForegroundColour(WXWidget widget, wxColour& foregroundColour)
 519 {
 520     if (!foregroundColour.IsOk())
 521         return;
 522
 523     // When should we specify the foreground, if it's calculated
 524     // by wxComputeColours?
 525     // Solution: say we start with the default (computed) foreground colour.
 526     // If we call SetForegroundColour explicitly for a control or window,
 527     // then the foreground is changed.
 528     // Therefore SetBackgroundColour computes the foreground colour, and
 529     // SetForegroundColour changes the foreground colour. The ordering is
 530     // important.
 531
 532     XtVaSetValues ((Widget) widget,
 533         XmNforeground, foregroundColour.AllocColour(XtDisplay((Widget) widget)),
 534         NULL);
 535 }
 536
 537 void wxDoChangeBackgroundColour(WXWidget widget, const wxColour& backgroundColour, bool changeArmColour)
 538 {
 539     if (!backgroundColour.IsOk())
 540         return;
 541
 542     wxComputeColours (XtDisplay((Widget) widget), & backgroundColour,
 543         NULL);
 544
 545     XtVaSetValues ((Widget) widget,
 546         XmNbackground, g_itemColors[wxBACK_INDEX].pixel,
 547         XmNtopShadowColor, g_itemColors[wxTOPS_INDEX].pixel,
 548         XmNbottomShadowColor, g_itemColors[wxBOTS_INDEX].pixel,
 549         XmNforeground, g_itemColors[wxFORE_INDEX].pixel,
 550         NULL);
 551
 552     if (changeArmColour)
 553         XtVaSetValues ((Widget) widget,
 554         XmNarmColor, g_itemColors[wxSELE_INDEX].pixel,
 555         NULL);
 556 }
 557
 558 extern void wxDoChangeFont(WXWidget widget, const wxFont& font)
 559 {
 560     // Lesstif 0.87 hangs here, but 0.93 does not; MBN: sometimes it does
 561 #if !wxCHECK_LESSTIF() // || wxCHECK_LESSTIF_VERSION( 0, 93 )
 562     Widget w = (Widget)widget;
 563     XtVaSetValues( w,
 564                    wxFont::GetFontTag(), font.GetFontTypeC( XtDisplay(w) ),
 565                    NULL );
 566 #else
 567     wxUnusedVar(widget);
 568     wxUnusedVar(font);
 569 #endif
 570
 571 }
 572
 573 wxString wxXmStringToString( const XmString& xmString )
 574 {
 575     char *txt;
 576     if( XmStringGetLtoR( xmString, XmSTRING_DEFAULT_CHARSET, &txt ) )
 577     {
 578         wxString str(txt);
 579         XtFree (txt);
 580         return str;
 581     }
 582
 583     return wxEmptyString;
 584 }
 585
 586 XmString wxStringToXmString( const char* str )
 587 {
 588     return XmStringCreateLtoR((char *)str, XmSTRING_DEFAULT_CHARSET);
 589 }
 590
 591 // ----------------------------------------------------------------------------
 592 // wxBitmap utility functions
 593 // ----------------------------------------------------------------------------
 594
 595 // Creates a bitmap with transparent areas drawn in
 596 // the given colour.
 597 wxBitmap wxCreateMaskedBitmap(const wxBitmap& bitmap, const wxColour& colour)
 598 {
 599     wxBitmap newBitmap(bitmap.GetWidth(),
 600                        bitmap.GetHeight(),
 601                        bitmap.GetDepth());
 602     wxMemoryDC destDC;
 603     wxMemoryDC srcDC;
 604
 605     srcDC.SelectObjectAsSource(bitmap);
 606     destDC.SelectObject(newBitmap);
 607
 608     wxBrush brush(colour, wxSOLID);
 609     destDC.SetBackground(brush);
 610     destDC.Clear();
 611     destDC.Blit(0, 0, bitmap.GetWidth(), bitmap.GetHeight(),
 612                 &srcDC, 0, 0, wxCOPY, true);
 613
 614     return newBitmap;
 615 }
 616
 617 // ----------------------------------------------------------------------------
 618 // Miscellaneous functions
 619 // ----------------------------------------------------------------------------
 620
 621 WXWidget wxCreateBorderWidget( WXWidget parent, long style )
 622 {
 623     Widget borderWidget = (Widget)NULL, parentWidget = (Widget)parent;
 624
 625     if (style & wxSIMPLE_BORDER)
 626     {
 627         borderWidget = XtVaCreateManagedWidget
 628                                    (
 629                                     "simpleBorder",
 630                                     xmFrameWidgetClass, parentWidget,
 631                                     XmNshadowType, XmSHADOW_ETCHED_IN,
 632                                     XmNshadowThickness, 1,
 633                                     NULL
 634                                    );
 635     }
 636     else if ((style & wxSUNKEN_BORDER) || (style & wxBORDER_THEME))
 637     {
 638         borderWidget = XtVaCreateManagedWidget
 639                                    (
 640                                     "sunkenBorder",
 641                                     xmFrameWidgetClass, parentWidget,
 642                                     XmNshadowType, XmSHADOW_IN,
 643                                     NULL
 644                                    );
 645     }
 646     else if (style & wxRAISED_BORDER)
 647     {
 648         borderWidget = XtVaCreateManagedWidget
 649                                    (
 650                                     "raisedBorder",
 651                                     xmFrameWidgetClass, parentWidget,
 652                                     XmNshadowType, XmSHADOW_OUT,
 653                                     NULL
 654                                    );
 655     }
 656
 657     return borderWidget;
 658 }