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 #ifdef __VMS
  24 #define XtDisplay XTDISPLAY
  25 #endif
  26
  27 #include "wx/utils.h"
  28
  29 #ifndef WX_PRECOMP
  30     #include "wx/app.h"
  31     #include "wx/dcmemory.h"
  32     #include "wx/bitmap.h"
  33 #endif
  34
  35 #include "wx/apptrait.h"
  36 #include "wx/evtloop.h"
  37 #include "wx/motif/private/timer.h"
  38
  39 #include <string.h>
  40
  41 #if (defined(__SUNCC__) || defined(__CLCC__))
  42     #include <sysent.h>
  43 #endif
  44
  45 #ifdef __VMS__
  46 #pragma message disable nosimpint
  47 #endif
  48
  49 #include "wx/unix/execute.h"
  50
  51 #include <Xm/Xm.h>
  52 #include <Xm/Frame.h>
  53
  54 #include "wx/motif/private.h"
  55
  56 #include "X11/Xutil.h"
  57
  58 #ifdef __VMS__
  59 #pragma message enable nosimpint
  60 #endif
  61
  62
  63 // ============================================================================
  64 // implementation
  65 // ============================================================================
  66
  67 // ----------------------------------------------------------------------------
  68 // async event processing
  69 // ----------------------------------------------------------------------------
  70
  71 // Consume all events until no more left
  72 void wxFlushEvents(WXDisplay* wxdisplay)
  73 {
  74     Display *display = (Display*)wxdisplay;
  75     wxEventLoop evtLoop;
  76
  77     XSync (display, False);
  78
  79     while (evtLoop.Pending())
  80     {
  81         XFlush (display);
  82         evtLoop.Dispatch();
  83     }
  84 }
  85
  86 // ----------------------------------------------------------------------------
  87 // wxExecute stuff
  88 // ----------------------------------------------------------------------------
  89
  90 static void xt_notify_end_process(XtPointer data, int *WXUNUSED(fid),
  91                                   XtInputId *id)
  92 {
  93     wxEndProcessData *proc_data = (wxEndProcessData *)data;
  94
  95     wxHandleProcessTermination(proc_data);
  96
  97     // VZ: I think they should be the same...
  98     wxASSERT( (int)*id == proc_data->tag );
  99
 100     XtRemoveInput(*id);
 101 }
 102
 103 int wxAddProcessCallback(wxEndProcessData *proc_data, int fd)
 104 {
 105     XtInputId id = XtAppAddInput((XtAppContext) wxTheApp->GetAppContext(),
 106                                  fd,
 107                                  (XtPointer *) XtInputReadMask,
 108                                  (XtInputCallbackProc) xt_notify_end_process,
 109                                  (XtPointer) proc_data);
 110
 111     return (int)id;
 112 }
 113
 114 // ----------------------------------------------------------------------------
 115 // misc
 116 // ----------------------------------------------------------------------------
 117
 118 // Emit a beeeeeep
 119 #ifndef __EMX__
 120 // on OS/2, we use the wxBell from wxBase library (src/os2/utils.cpp)
 121 void wxBell()
 122 {
 123     // Use current setting for the bell
 124     XBell (wxGlobalDisplay(), 0);
 125 }
 126 #endif
 127
 128 wxPortId wxGUIAppTraits::GetToolkitVersion(int *verMaj, int *verMin) const
 129 {
 130     // XmVERSION and XmREVISION are defined in Xm/Xm.h
 131     if ( verMaj )
 132         *verMaj = XmVERSION;
 133     if ( verMin )
 134         *verMin = XmREVISION;
 135
 136     return wxPORT_MOTIF;
 137 }
 138
 139 wxEventLoopBase* wxGUIAppTraits::CreateEventLoop()
 140 {
 141     return new wxEventLoop;
 142 }
 143
 144 wxTimerImpl* wxGUIAppTraits::CreateTimerImpl(wxTimer* timer)
 145 {
 146     return new wxMotifTimerImpl(timer);
 147 }
 148
 149 // ----------------------------------------------------------------------------
 150 // display info
 151 // ----------------------------------------------------------------------------
 152
 153 void wxGetMousePosition( int* x, int* y )
 154 {
 155 #if wxUSE_NANOX
 156     // TODO
 157     *x = 0;
 158     *y = 0;
 159 #else
 160     XMotionEvent xev;
 161     Window root, child;
 162     XQueryPointer(wxGlobalDisplay(),
 163                   DefaultRootWindow(wxGlobalDisplay()),
 164                   &root, &child,
 165                   &(xev.x_root), &(xev.y_root),
 166                   &(xev.x),      &(xev.y),
 167                   &(xev.state));
 168     *x = xev.x_root;
 169     *y = xev.y_root;
 170 #endif
 171 }
 172
 173 // Return true if we have a colour display
 174 bool wxColourDisplay()
 175 {
 176     return wxDisplayDepth() > 1;
 177 }
 178
 179 // Returns depth of screen
 180 int wxDisplayDepth()
 181 {
 182     Display *dpy = wxGlobalDisplay();
 183
 184     return DefaultDepth (dpy, DefaultScreen (dpy));
 185 }
 186
 187 // Get size of display
 188 void wxDisplaySize(int *width, int *height)
 189 {
 190     Display *dpy = wxGlobalDisplay();
 191
 192     if ( width )
 193         *width = DisplayWidth (dpy, DefaultScreen (dpy));
 194     if ( height )
 195         *height = DisplayHeight (dpy, DefaultScreen (dpy));
 196 }
 197
 198 void wxDisplaySizeMM(int *width, int *height)
 199 {
 200     Display *dpy = wxGlobalDisplay();
 201
 202     if ( width )
 203         *width = DisplayWidthMM(dpy, DefaultScreen (dpy));
 204     if ( height )
 205         *height = DisplayHeightMM(dpy, DefaultScreen (dpy));
 206 }
 207
 208 // Configurable display in wxX11 and wxMotif
 209 static WXDisplay *gs_currentDisplay = NULL;
 210 static wxString gs_displayName;
 211
 212 WXDisplay *wxGetDisplay()
 213 {
 214     if (gs_currentDisplay)
 215         return gs_currentDisplay;
 216     else if (wxTheApp)
 217         return wxTheApp->GetInitialDisplay();
 218     return NULL;
 219 }
 220
 221 bool wxSetDisplay(const wxString& display_name)
 222 {
 223     gs_displayName = display_name;
 224
 225     if ( display_name.empty() )
 226     {
 227         gs_currentDisplay = NULL;
 228
 229         return true;
 230     }
 231     else
 232     {
 233         Cardinal argc = 0;
 234
 235         Display *display = XtOpenDisplay((XtAppContext) wxTheApp->GetAppContext(),
 236             display_name.c_str(),
 237             wxTheApp->GetAppName().c_str(),
 238             wxTheApp->GetClassName().c_str(),
 239             NULL,
 240 #if XtSpecificationRelease < 5
 241             0, &argc,
 242 #else
 243             0, (int *)&argc,
 244 #endif
 245             NULL);
 246
 247         if (display)
 248         {
 249             gs_currentDisplay = (WXDisplay*) display;
 250             return true;
 251         }
 252         else
 253             return false;
 254     }
 255 }
 256
 257 wxString wxGetDisplayName()
 258 {
 259     return gs_displayName;
 260 }
 261
 262 wxWindow* wxFindWindowAtPoint(const wxPoint& pt)
 263 {
 264     return wxGenericFindWindowAtPoint(pt);
 265 }
 266
 267 // ----------------------------------------------------------------------------
 268 // Some colour manipulation routines
 269 // ----------------------------------------------------------------------------
 270
 271 void wxHSVToXColor(wxHSV *hsv,XColor *rgb)
 272 {
 273     int h = hsv->h;
 274     int s = hsv->s;
 275     int v = hsv->v;
 276     int r = 0, g = 0, b = 0;
 277     int i, f;
 278     int p, q, t;
 279     s = (s * wxMAX_RGB) / wxMAX_SV;
 280     v = (v * wxMAX_RGB) / wxMAX_SV;
 281     if (h == 360) h = 0;
 282     if (s == 0) { h = 0; r = g = b = v; }
 283     i = h / 60;
 284     f = h % 60;
 285     p = v * (wxMAX_RGB - s) / wxMAX_RGB;
 286     q = v * (wxMAX_RGB - s * f / 60) / wxMAX_RGB;
 287     t = v * (wxMAX_RGB - s * (60 - f) / 60) / wxMAX_RGB;
 288     switch (i)
 289     {
 290     case 0: r = v, g = t, b = p; break;
 291     case 1: r = q, g = v, b = p; break;
 292     case 2: r = p, g = v, b = t; break;
 293     case 3: r = p, g = q, b = v; break;
 294     case 4: r = t, g = p, b = v; break;
 295     case 5: r = v, g = p, b = q; break;
 296     }
 297     rgb->red = (unsigned short)(r << 8);
 298     rgb->green = (unsigned short)(g << 8);
 299     rgb->blue = (unsigned short)(b << 8);
 300 }
 301
 302 void wxXColorToHSV(wxHSV *hsv,XColor *rgb)
 303 {
 304     int r = rgb->red >> 8;
 305     int g = rgb->green >> 8;
 306     int b = rgb->blue >> 8;
 307     int maxv = wxMax3(r, g, b);
 308     int minv = wxMin3(r, g, b);
 309     int h = 0, s, v;
 310     v = maxv;
 311     if (maxv) s = (maxv - minv) * wxMAX_RGB / maxv;
 312     else s = 0;
 313     if (s == 0) h = 0;
 314     else
 315     {
 316         int rc, gc, bc, hex = 0;
 317         rc = (maxv - r) * wxMAX_RGB / (maxv - minv);
 318         gc = (maxv - g) * wxMAX_RGB / (maxv - minv);
 319         bc = (maxv - b) * wxMAX_RGB / (maxv - minv);
 320         if (r == maxv) { h = bc - gc, hex = 0; }
 321         else if (g == maxv) { h = rc - bc, hex = 2; }
 322         else if (b == maxv) { h = gc - rc, hex = 4; }
 323         h = hex * 60 + (h * 60 / wxMAX_RGB);
 324         if (h < 0) h += 360;
 325     }
 326     hsv->h = h;
 327     hsv->s = (s * wxMAX_SV) / wxMAX_RGB;
 328     hsv->v = (v * wxMAX_SV) / wxMAX_RGB;
 329 }
 330
 331 void wxAllocNearestColor(Display *d,Colormap cmp,XColor *xc)
 332 {
 333 #if !wxUSE_NANOX
 334     int llp;
 335
 336     int screen = DefaultScreen(d);
 337     int num_colors = DisplayCells(d,screen);
 338
 339     XColor *color_defs = new XColor[num_colors];
 340     for(llp = 0;llp < num_colors;llp++) color_defs[llp].pixel = llp;
 341     XQueryColors(d,cmp,color_defs,num_colors);
 342
 343     wxHSV hsv_defs, hsv;
 344     wxXColorToHSV(&hsv,xc);
 345
 346     int diff, min_diff = 0, pixel = 0;
 347
 348     for(llp = 0;llp < num_colors;llp++)
 349     {
 350         wxXColorToHSV(&hsv_defs,&color_defs[llp]);
 351         diff = wxSIGN(wxH_WEIGHT * (hsv.h - hsv_defs.h)) +
 352             wxSIGN(wxS_WEIGHT * (hsv.s - hsv_defs.s)) +
 353             wxSIGN(wxV_WEIGHT * (hsv.v - hsv_defs.v));
 354         if (llp == 0) min_diff = diff;
 355         if (min_diff > diff) { min_diff = diff; pixel = llp; }
 356         if (min_diff == 0) break;
 357     }
 358
 359     xc -> red = color_defs[pixel].red;
 360     xc -> green = color_defs[pixel].green;
 361     xc -> blue = color_defs[pixel].blue;
 362     xc -> flags = DoRed | DoGreen | DoBlue;
 363
 364 /*  FIXME, TODO
 365     if (!XAllocColor(d,cmp,xc))
 366         cout << "wxAllocNearestColor : Warning : Cannot find nearest color !\n";
 367 */
 368
 369     delete[] color_defs;
 370 #endif
 371 }
 372
 373 void wxAllocColor(Display *d,Colormap cmp,XColor *xc)
 374 {
 375     if (!XAllocColor(d,cmp,xc))
 376     {
 377         //          cout << "wxAllocColor : Warning : Can not allocate color, attempt find nearest !\n";
 378         wxAllocNearestColor(d,cmp,xc);
 379     }
 380 }
 381
 382 #ifdef __WXDEBUG__
 383 wxString wxGetXEventName(XEvent& event)
 384 {
 385 #if wxUSE_NANOX
 386     wxString str(wxT("(some event)"));
 387     return str;
 388 #else
 389     int type = event.xany.type;
 390     static char* event_name[] = {
 391         wxMOTIF_STR(""), wxMOTIF_STR("unknown(-)"),                                         // 0-1
 392         wxMOTIF_STR("KeyPress"), wxMOTIF_STR("KeyRelease"), wxMOTIF_STR("ButtonPress"), wxMOTIF_STR("ButtonRelease"), // 2-5
 393         wxMOTIF_STR("MotionNotify"), wxMOTIF_STR("EnterNotify"), wxMOTIF_STR("LeaveNotify"), wxMOTIF_STR("FocusIn"),  // 6-9
 394         wxMOTIF_STR("FocusOut"), wxMOTIF_STR("KeymapNotify"), wxMOTIF_STR("Expose"), wxMOTIF_STR("GraphicsExpose"),   // 10-13
 395         wxMOTIF_STR("NoExpose"), wxMOTIF_STR("VisibilityNotify"), wxMOTIF_STR("CreateNotify"),           // 14-16
 396         wxMOTIF_STR("DestroyNotify"), wxMOTIF_STR("UnmapNotify"), wxMOTIF_STR("MapNotify"), wxMOTIF_STR("MapRequest"),// 17-20
 397         wxMOTIF_STR("ReparentNotify"), wxMOTIF_STR("ConfigureNotify"), wxMOTIF_STR("ConfigureRequest"),  // 21-23
 398         wxMOTIF_STR("GravityNotify"), wxMOTIF_STR("ResizeRequest"), wxMOTIF_STR("CirculateNotify"),      // 24-26
 399         wxMOTIF_STR("CirculateRequest"), wxMOTIF_STR("PropertyNotify"), wxMOTIF_STR("SelectionClear"),   // 27-29
 400         wxMOTIF_STR("SelectionRequest"), wxMOTIF_STR("SelectionNotify"), wxMOTIF_STR("ColormapNotify"),  // 30-32
 401         wxMOTIF_STR("ClientMessage"), wxMOTIF_STR("MappingNotify"),                         // 33-34
 402         wxMOTIF_STR("unknown(+)")};                                            // 35
 403     type = wxMin(35, type); type = wxMax(1, type);
 404     wxString str(event_name[type]);
 405     return str;
 406 #endif
 407 }
 408 #endif
 409
 410 // ----------------------------------------------------------------------------
 411 // accelerators
 412 // ----------------------------------------------------------------------------
 413
 414 // Find the letter corresponding to the mnemonic, for Motif
 415 char wxFindMnemonic (const char *s)
 416 {
 417     char mnem = 0;
 418     int len = strlen (s);
 419     int i;
 420
 421     for (i = 0; i < len; i++)
 422     {
 423         if (s[i] == '&')
 424         {
 425             // Carefully handle &&
 426             if ((i + 1) <= len && s[i + 1] == '&')
 427                 i++;
 428             else
 429             {
 430                 mnem = s[i + 1];
 431                 break;
 432             }
 433         }
 434     }
 435     return mnem;
 436 }
 437
 438 char* wxFindAccelerator( const char *s )
 439 {
 440 #if 1
 441     wxUnusedVar(s);
 442     // VZ: this function returns incorrect keysym which completely breaks kbd
 443     //     handling
 444     return NULL;
 445 #else
 446     // The accelerator text is after the \t char.
 447     s = strchr( s, '\t' );
 448
 449     if( !s ) return NULL;
 450
 451     /*
 452     Now we need to format it as X standard:
 453
 454       input            output
 455
 456         F7           --> <Key>F7
 457         Ctrl+N       --> Ctrl<Key>N
 458         Alt+k        --> Meta<Key>k
 459         Ctrl+Shift+A --> Ctrl Shift<Key>A
 460
 461         and handle Ctrl-N & similia
 462     */
 463
 464     static char buf[256];
 465
 466     buf[0] = '\0';
 467     wxString tmp = s + 1; // skip TAB
 468     size_t index = 0;
 469
 470     while( index < tmp.length() )
 471     {
 472         size_t plus  = tmp.find( '+', index );
 473         size_t minus = tmp.find( '-', index );
 474
 475         // neither '+' nor '-', add <Key>
 476         if( plus == wxString::npos && minus == wxString::npos )
 477         {
 478             strcat( buf, "<Key>" );
 479             strcat( buf, tmp.c_str() + index );
 480
 481             return buf;
 482         }
 483
 484         // OK: npos is big and positive
 485         size_t sep = wxMin( plus, minus );
 486         wxString mod = tmp.substr( index, sep - index );
 487
 488         // Ctrl  -> Ctrl
 489         // Shift -> Shift
 490         // Alt   -> Meta
 491         if( mod == "Alt" )
 492             mod = "Meta";
 493
 494         if( buf[0] )
 495             strcat( buf, " " );
 496
 497         strcat( buf, mod.c_str() );
 498
 499         index = sep + 1;
 500     }
 501
 502     return NULL;
 503 #endif
 504 }
 505
 506 XmString wxFindAcceleratorText (const char *s)
 507 {
 508 #if 1
 509     wxUnusedVar(s);
 510     // VZ: this function returns incorrect keysym which completely breaks kbd
 511     //     handling
 512     return NULL;
 513 #else
 514     // The accelerator text is after the \t char.
 515     s = strchr( s, '\t' );
 516
 517     if( !s ) return NULL;
 518
 519     return wxStringToXmString( s + 1 ); // skip TAB!
 520 #endif
 521 }
 522
 523 // Change a widget's foreground and background colours.
 524 void wxDoChangeForegroundColour(WXWidget widget, wxColour& foregroundColour)
 525 {
 526     if (!foregroundColour.Ok())
 527         return;
 528
 529     // When should we specify the foreground, if it's calculated
 530     // by wxComputeColours?
 531     // Solution: say we start with the default (computed) foreground colour.
 532     // If we call SetForegroundColour explicitly for a control or window,
 533     // then the foreground is changed.
 534     // Therefore SetBackgroundColour computes the foreground colour, and
 535     // SetForegroundColour changes the foreground colour. The ordering is
 536     // important.
 537
 538     XtVaSetValues ((Widget) widget,
 539         XmNforeground, foregroundColour.AllocColour(XtDisplay((Widget) widget)),
 540         NULL);
 541 }
 542
 543 void wxDoChangeBackgroundColour(WXWidget widget, const wxColour& backgroundColour, bool changeArmColour)
 544 {
 545     if (!backgroundColour.Ok())
 546         return;
 547
 548     wxComputeColours (XtDisplay((Widget) widget), & backgroundColour,
 549         (wxColour*) NULL);
 550
 551     XtVaSetValues ((Widget) widget,
 552         XmNbackground, g_itemColors[wxBACK_INDEX].pixel,
 553         XmNtopShadowColor, g_itemColors[wxTOPS_INDEX].pixel,
 554         XmNbottomShadowColor, g_itemColors[wxBOTS_INDEX].pixel,
 555         XmNforeground, g_itemColors[wxFORE_INDEX].pixel,
 556         NULL);
 557
 558     if (changeArmColour)
 559         XtVaSetValues ((Widget) widget,
 560         XmNarmColor, g_itemColors[wxSELE_INDEX].pixel,
 561         NULL);
 562 }
 563
 564 extern void wxDoChangeFont(WXWidget widget, const wxFont& font)
 565 {
 566     // Lesstif 0.87 hangs here, but 0.93 does not; MBN: sometimes it does
 567 #if !wxCHECK_LESSTIF() // || wxCHECK_LESSTIF_VERSION( 0, 93 )
 568     Widget w = (Widget)widget;
 569     XtVaSetValues( w,
 570                    wxFont::GetFontTag(), font.GetFontTypeC( XtDisplay(w) ),
 571                    NULL );
 572 #else
 573     wxUnusedVar(widget);
 574     wxUnusedVar(font);
 575 #endif
 576
 577 }
 578
 579 wxString wxXmStringToString( const XmString& xmString )
 580 {
 581     char *txt;
 582     if( XmStringGetLtoR( xmString, XmSTRING_DEFAULT_CHARSET, &txt ) )
 583     {
 584         wxString str(txt);
 585         XtFree (txt);
 586         return str;
 587     }
 588
 589     return wxEmptyString;
 590 }
 591
 592 XmString wxStringToXmString( const char* str )
 593 {
 594     return XmStringCreateLtoR((char *)str, XmSTRING_DEFAULT_CHARSET);
 595 }
 596
 597 // ----------------------------------------------------------------------------
 598 // wxBitmap utility functions
 599 // ----------------------------------------------------------------------------
 600
 601 // Creates a bitmap with transparent areas drawn in
 602 // the given colour.
 603 wxBitmap wxCreateMaskedBitmap(const wxBitmap& bitmap, const wxColour& colour)
 604 {
 605     wxBitmap newBitmap(bitmap.GetWidth(),
 606                        bitmap.GetHeight(),
 607                        bitmap.GetDepth());
 608     wxMemoryDC destDC;
 609     wxMemoryDC srcDC;
 610
 611     srcDC.SelectObjectAsSource(bitmap);
 612     destDC.SelectObject(newBitmap);
 613
 614     wxBrush brush(colour, wxSOLID);
 615     destDC.SetBackground(brush);
 616     destDC.Clear();
 617     destDC.Blit(0, 0, bitmap.GetWidth(), bitmap.GetHeight(),
 618                 &srcDC, 0, 0, wxCOPY, true);
 619
 620     return newBitmap;
 621 }
 622
 623 // ----------------------------------------------------------------------------
 624 // Miscellaneous functions
 625 // ----------------------------------------------------------------------------
 626
 627 WXWidget wxCreateBorderWidget( WXWidget parent, long style )
 628 {
 629     Widget borderWidget = (Widget)NULL, parentWidget = (Widget)parent;
 630
 631     if (style & wxSIMPLE_BORDER)
 632     {
 633         borderWidget = XtVaCreateManagedWidget
 634                                    (
 635                                     "simpleBorder",
 636                                     xmFrameWidgetClass, parentWidget,
 637                                     XmNshadowType, XmSHADOW_ETCHED_IN,
 638                                     XmNshadowThickness, 1,
 639                                     NULL
 640                                    );
 641     }
 642     else if (style & wxSUNKEN_BORDER)
 643     {
 644         borderWidget = XtVaCreateManagedWidget
 645                                    (
 646                                     "sunkenBorder",
 647                                     xmFrameWidgetClass, parentWidget,
 648                                     XmNshadowType, XmSHADOW_IN,
 649                                     NULL
 650                                    );
 651     }
 652     else if (style & wxRAISED_BORDER)
 653     {
 654         borderWidget = XtVaCreateManagedWidget
 655                                    (
 656                                     "raisedBorder",
 657                                     xmFrameWidgetClass, parentWidget,
 658                                     XmNshadowType, XmSHADOW_OUT,
 659                                     NULL
 660                                    );
 661     }
 662
 663     return borderWidget;
 664 }