Dogcows Code - chaz/openbox/blob - otk/widget.cc

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2
   3 #include "config.h"
   4 #include "widget.hh"
   5 #include "display.hh"
   6 #include "surface.hh"
   7 #include "rendertexture.hh"
   8 #include "rendercolor.hh"
   9 #include "eventdispatcher.hh"
  10 #include "screeninfo.hh"
  11
  12 #include <climits>
  13 #include <cassert>
  14 #include <algorithm>
  15
  16 namespace otk {
  17
  18 Widget::Widget(int screen, EventDispatcher *ed, Direction direction, int bevel,
  19                bool overrideredir)
  20   : _texture(0),
  21     _screen(screen),
  22     _parent(0),
  23     _window(0),
  24     _surface(0),
  25     _event_mask(ButtonPressMask | ButtonReleaseMask | ButtonMotionMask |
  26                 ExposureMask | StructureNotifyMask),
  27     _alignment(RenderStyle::CenterJustify),
  28     _direction(direction),
  29     _max_size(INT_MAX, INT_MAX),
  30     _visible(false),
  31     _bordercolor(0),
  32     _borderwidth(0),
  33     _bevel(bevel),
  34     _dirty(true),
  35     _dispatcher(ed),
  36     _ignore_config(0)
  37 {
  38   createWindow(overrideredir);
  39   _dispatcher->registerHandler(_window, this);
  40 }
  41
  42 Widget::Widget(Widget *parent, Direction direction, int bevel)
  43   : _texture(0),
  44     _screen(parent->_screen),
  45     _parent(parent),
  46     _window(0),
  47     _surface(0),
  48     _event_mask(ButtonPressMask | ButtonReleaseMask | ButtonMotionMask |
  49                 ExposureMask | StructureNotifyMask),
  50     _alignment(RenderStyle::CenterJustify),
  51     _direction(direction),
  52     _max_size(INT_MAX, INT_MAX),
  53     _visible(false),
  54     _bordercolor(0),
  55     _borderwidth(0),
  56     _bevel(bevel),
  57     _dirty(true),
  58     _dispatcher(parent->_dispatcher),
  59     _ignore_config(0)
  60 {
  61   assert(parent);
  62   createWindow(false);
  63   parent->addChild(this);
  64   if (parent->visible()) parent->layout();
  65   _dispatcher->registerHandler(_window, this);
  66   styleChanged(*RenderStyle::style(_screen));
  67 }
  68
  69 Widget::~Widget()
  70 {
  71   assert(_children.empty()); // this would be bad. theyd have a hanging _parent
  72
  73   if (_surface) delete _surface;
  74   if (_parent) _parent->removeChild(this);
  75
  76   _dispatcher->clearHandler(_window);
  77   XDestroyWindow(**display, _window);
  78 }
  79
  80 void Widget::show(bool children)
  81 {
  82   if (children) {
  83     std::list<Widget*>::iterator it , end = _children.end();
  84     for (it = _children.begin(); it != end; ++it) {
  85       (*it)->show(true);
  86     }
  87   }
  88   if (!_visible) {
  89     if (_parent) _parent->calcDefaultSizes();
  90     else resize(_area.size()); // constrain sizes
  91     _visible = true;
  92     XMapWindow(**display, _window);
  93     update();
  94   }
  95 }
  96
  97 void Widget::hide()
  98 {
  99   if (_visible) {
 100     _visible = false;
 101     XUnmapWindow(**display, _window);
 102     if (_parent) {
 103       _parent->calcDefaultSizes();
 104       _parent->layout();
 105     }
 106   }
 107 }
 108
 109 void Widget::setEventMask(long e)
 110 {
 111   XSelectInput(**display, _window, e);
 112   _event_mask = e;
 113 }
 114
 115 void Widget::update()
 116 {
 117   if (!_visible) return;
 118   _dirty = true;
 119   if (_parent) {
 120     _parent->calcDefaultSizes();
 121     _parent->layout(); // relay-out us and our siblings
 122   } else {
 123     render();
 124     layout();
 125   }
 126 }
 127
 128 void Widget::moveresize(const Rect &r)
 129 {
 130   int w, h;
 131   w = std::max(std::min(r.width(), maxSize().width()), minSize().width());
 132   h = std::max(std::min(r.height(), maxSize().height()), minSize().height());
 133
 134   bool sizechange = !(w == area().width() && h == area().height());
 135
 136   if (r.x() == area().x() && r.y() == area().y() && !sizechange)
 137     return; // no change, don't cause a big layout chain to occur!
 138
 139   internal_moveresize(r.x(), r.y(), w, h);
 140
 141   if (sizechange)
 142     update();
 143 }
 144
 145 void Widget::internal_moveresize(int x, int y, int w, int h)
 146 {
 147   assert(w > 0);
 148   assert(h > 0);
 149   assert(_borderwidth >= 0);
 150   _dirty = true;
 151   if (!(x == _area.x() && y == _area.y())) {
 152     if (!(w == _area.width() && h == _area.height()))
 153       XMoveResizeWindow(**display, _window, x, y,
 154                         w - _borderwidth * 2,
 155                         h - _borderwidth * 2);
 156     else
 157       XMoveWindow(**display, _window, x, y);
 158   } else
 159     XResizeWindow(**display, _window, w - _borderwidth*2, h - _borderwidth*2);
 160   _ignore_config++;
 161
 162   _area = Rect(x, y, w, h);
 163 }
 164
 165 void Widget::setAlignment(RenderStyle::Justify a)
 166 {
 167   _alignment = a;
 168   layout();
 169 }
 170
 171 void Widget::createWindow(bool overrideredir)
 172 {
 173   const ScreenInfo *info = display->screenInfo(_screen);
 174   XSetWindowAttributes attrib;
 175   unsigned long mask = CWEventMask | CWBorderPixel;
 176
 177   attrib.event_mask = _event_mask;
 178   attrib.border_pixel = (_bordercolor ?
 179                          _bordercolor->pixel():
 180                          BlackPixel(**display, _screen));
 181
 182   if (overrideredir) {
 183     mask |= CWOverrideRedirect;
 184     attrib.override_redirect = true;
 185   }
 186
 187   _window = XCreateWindow(**display, (_parent ?
 188                                       _parent->_window :
 189                                       RootWindow(**display, _screen)),
 190                           _area.x(), _area.y(),
 191                           _area.width(), _area.height(),
 192                           _borderwidth,
 193                           info->depth(),
 194                           InputOutput,
 195                           info->visual(),
 196                           mask,
 197                           &attrib);
 198   assert(_window != None);
 199   ++_ignore_config;
 200 }
 201
 202 void Widget::calcDefaultSizes()
 203 {
 204   std::list<Widget*>::const_iterator it, end = _children.end();
 205   int min_biggest = 0, max_biggest = 0;
 206   int min_sum = _bevel + _borderwidth * 2;
 207   int max_sum = _bevel + _borderwidth * 2;
 208   bool fullmax = false;
 209
 210   for (it = _children.begin(); it != end; ++it) {
 211     const otk::Size &min = (*it)->minSize();
 212     const otk::Size &max = (*it)->maxSize();
 213     if (_direction == Horizontal) {
 214       if (min.height() > min_biggest) min_biggest = min.height();
 215       if (max.height() > max_biggest) max_biggest = max.height();
 216       min_sum += _bevel + min.width();
 217       if (max.width() == INT_MAX)
 218         fullmax = true;
 219       else if (!fullmax)
 220         max_sum += _bevel + max.width();
 221     } else {
 222       if (min.width() > min_biggest) min_biggest = min.width();
 223       if (max.width() > max_biggest) max_biggest = max.width();
 224       min_sum += _bevel + min.height();
 225       if (max.height() == INT_MAX)
 226         fullmax = true;
 227       else if (!fullmax)
 228         max_sum += _bevel + max.height();
 229     }
 230   }
 231   if (_direction == Horizontal) {
 232     _min_size = otk::Size(min_sum + (_bevel + _borderwidth) * 2,
 233                           min_biggest + (_bevel + _borderwidth) * 2);
 234     _max_size = otk::Size((fullmax ? INT_MAX :
 235                            max_sum  + (_bevel + _borderwidth) * 2),
 236                           max_biggest);
 237   } else {
 238     _min_size = otk::Size(min_biggest + (_bevel + _borderwidth) * 2,
 239                           min_sum + (_bevel + _borderwidth) * 2);
 240     _max_size = otk::Size(max_biggest, (fullmax ? INT_MAX : max_sum +
 241                                         (_bevel + _borderwidth) * 2));
 242   }
 243   update();
 244 }
 245
 246 void Widget::setBorderWidth(int w)
 247 {
 248   assert(w >= 0);
 249   if (!parent()) return; // top-level windows cannot have borders
 250   if (w == borderWidth()) return; // no change
 251
 252   _borderwidth = w;
 253   XSetWindowBorderWidth(**display, _window, _borderwidth);
 254
 255   calcDefaultSizes();
 256   update();
 257 }
 258
 259 void Widget::setMinSize(const Size &s)
 260 {
 261   _min_size = s;
 262   update();
 263 }
 264
 265 void Widget::setMaxSize(const Size &s)
 266 {
 267   _max_size = s;
 268   update();
 269 }
 270
 271 void Widget::setBorderColor(const RenderColor *c)
 272 {
 273   _bordercolor = c;
 274   XSetWindowBorder(**otk::display, _window,
 275                    c ? c->pixel() : BlackPixel(**otk::display, _screen));
 276 }
 277
 278 void Widget::setBevel(int b)
 279 {
 280   _bevel = b;
 281   calcDefaultSizes();
 282   layout();
 283 }
 284
 285 void Widget::layout()
 286 {
 287   if (_children.empty() || !_visible) return;
 288   if (_direction == Horizontal)
 289     layoutHorz();
 290   else
 291     layoutVert();
 292 }
 293
 294 void Widget::layoutHorz()
 295 {
 296   std::list<Widget*>::iterator it, end;
 297
 298   // work with just the visible children
 299   std::list<Widget*> visible;
 300   for (it = _children.begin(), end = _children.end(); it != end; ++it)
 301     if ((*it)->visible())
 302       visible.push_back(*it);
 303
 304   if (visible.empty()) return;
 305
 306   int x, y, w, h; // working area
 307   x = y = _bevel;
 308   w = _area.width() - _borderwidth * 2 - _bevel * 2;
 309   h = _area.height() - _borderwidth * 2 - _bevel * 2;
 310   if (w < 0 || h < 0) return; // not worth laying anything out!
 311
 312   int free = w - (visible.size() - 1) * _bevel;
 313   if (free < 0) free = 0;
 314   int each;
 315
 316   std::list<Widget*> adjustable;
 317
 318   // find the 'free' space, and how many children will be using it
 319   for (it = visible.begin(), end = visible.end(); it != end; ++it) {
 320     free -= (*it)->minSize().width();
 321     if (free < 0) free = 0;
 322     if ((*it)->maxSize().width() - (*it)->minSize().width() > 0)
 323       adjustable.push_back(*it);
 324   }
 325   // some widgets may have max widths that restrict them, find the 'true'
 326   // amount of free space after these widgets are not included
 327   if (!adjustable.empty()) {
 328     do {
 329       each = free / adjustable.size();
 330       for (it = adjustable.begin(), end = adjustable.end(); it != end;) {
 331         std::list<Widget*>::iterator next = it; ++next;
 332         int m = (*it)->maxSize().width() - (*it)->minSize().width();
 333         if (m > 0 && m < each) {
 334           free -= m;
 335           if (free < 0) free = 0;
 336           adjustable.erase(it);
 337           break; // if one is found to be fixed, then the free space needs to
 338                  // change, and the rest need to be reexamined
 339         }
 340         it = next;
 341       }
 342     } while (it != end && !adjustable.empty());
 343   }
 344
 345   // place/size the widgets
 346   if (!adjustable.empty())
 347     each = free / adjustable.size();
 348   else
 349     each = 0;
 350   for (it = visible.begin(), end = visible.end(); it != end; ++it) {
 351     int w;
 352     // is the widget adjustable?
 353     std::list<Widget*>::const_iterator
 354       found = std::find(adjustable.begin(), adjustable.end(), *it);
 355     if (found != adjustable.end()) {
 356       // adjustable
 357       w = (*it)->minSize().width() + each;
 358     } else {
 359       // fixed
 360       w = (*it)->minSize().width();
 361     }
 362     // align it vertically
 363     int yy = y;
 364     int hh = std::max(std::min(h, (*it)->_max_size.height()),
 365                       (*it)->_min_size.height());
 366     if (hh < h) {
 367       switch(_alignment) {
 368       case RenderStyle::RightBottomJustify:
 369         yy += h - hh;
 370         break;
 371       case RenderStyle::CenterJustify:
 372         yy += (h - hh) / 2;
 373         break;
 374       case RenderStyle::LeftTopJustify:
 375         break;
 376       }
 377     }
 378     (*it)->internal_moveresize(x, yy, w, hh);
 379     (*it)->render();
 380     (*it)->layout();
 381     x += w + _bevel;
 382   }
 383 }
 384
 385 void Widget::layoutVert()
 386 {
 387   std::list<Widget*>::iterator it, end;
 388
 389   // work with just the visible children
 390   std::list<Widget*> visible;
 391   for (it = _children.begin(), end = _children.end(); it != end; ++it)
 392     if ((*it)->visible())
 393       visible.push_back(*it);
 394
 395   if (visible.empty()) return;
 396
 397   int x, y, w, h; // working area
 398   x = y = _bevel;
 399   w = _area.width() - _borderwidth * 2 - _bevel * 2;
 400   h = _area.height() - _borderwidth * 2 - _bevel * 2;
 401   if (w < 0 || h < 0) return; // not worth laying anything out!
 402
 403   int free = h - (visible.size() - 1) * _bevel;
 404   if (free < 0) free = 0;
 405   int each;
 406
 407   std::list<Widget*> adjustable;
 408
 409   // find the 'free' space, and how many children will be using it
 410   for (it = visible.begin(), end = visible.end(); it != end; ++it) {
 411     free -= (*it)->minSize().height();
 412     if (free < 0) free = 0;
 413     if ((*it)->maxSize().height() - (*it)->minSize().height() > 0)
 414       adjustable.push_back(*it);
 415   }
 416   // some widgets may have max heights that restrict them, find the 'true'
 417   // amount of free space after these widgets are not included
 418   if (!adjustable.empty()) {
 419     do {
 420       each = free / adjustable.size();
 421       for (it = adjustable.begin(), end = adjustable.end(); it != end;) {
 422         std::list<Widget*>::iterator next = it; ++next;
 423         int m = (*it)->maxSize().height() - (*it)->minSize().height();
 424         if (m > 0 && m < each) {
 425           free -= m;
 426           if (free < 0) free = 0;
 427           adjustable.erase(it);
 428           break; // if one is found to be fixed, then the free space needs to
 429                  // change, and the rest need to be reexamined
 430         }
 431         it = next;
 432       }
 433     } while (it != end && !adjustable.empty());
 434   }
 435
 436   // place/size the widgets
 437   if (!adjustable.empty())
 438     each = free / adjustable.size();
 439   else
 440     each = 0;
 441   for (it = visible.begin(), end = visible.end(); it != end; ++it) {
 442     int h;
 443     // is the widget adjustable?
 444     std::list<Widget*>::const_iterator
 445       found = std::find(adjustable.begin(), adjustable.end(), *it);
 446     if (found != adjustable.end()) {
 447       // adjustable
 448       h = (*it)->minSize().height() + each;
 449     } else {
 450       // fixed
 451       h = (*it)->minSize().height();
 452     }
 453     // align it horizontally
 454     int xx = x;
 455     int ww = std::max(std::min(w, (*it)->_max_size.width()),
 456                       (*it)->_min_size.width());
 457     if (ww < w) {
 458       switch(_alignment) {
 459       case RenderStyle::RightBottomJustify:
 460         xx += w - ww;
 461         break;
 462       case RenderStyle::CenterJustify:
 463         xx += (w - ww) / 2;
 464         break;
 465       case RenderStyle::LeftTopJustify:
 466         break;
 467       }
 468     }
 469     (*it)->internal_moveresize(xx, y, ww, h);
 470     (*it)->render();
 471     (*it)->layout();
 472     y += h + _bevel;
 473   }
 474 }
 475
 476 void Widget::render()
 477 {
 478   if (!_dirty) return;
 479   if (!_texture) {
 480     // set a solid color as the default background
 481     XSetWindowBackground(**display, _window,
 482                          RenderStyle::style(_screen)->
 483                          titlebarUnfocusBackground()->color().pixel());
 484     return;
 485   }
 486   if (_borderwidth * 2 > _area.width() ||
 487       _borderwidth * 2 > _area.height())
 488     return; // no surface to draw on
 489
 490   Surface *s = new Surface(_screen, Size(_area.width() - _borderwidth * 2,
 491                                          _area.height() - _borderwidth * 2));
 492   display->renderControl(_screen)->drawBackground(*s, *_texture);
 493
 494   renderForeground(*s); // for inherited types to render onto the _surface
 495
 496   XSetWindowBackgroundPixmap(**display, _window, s->pixmap());
 497   XClearWindow(**display, _window);
 498
 499   // delete the old surface *after* its pixmap isn't in use anymore
 500   if (_surface) delete _surface;
 501
 502   s->freePixelData(); // done rendering with this surface
 503   _surface = s;
 504
 505   _dirty = false;
 506 }
 507
 508 void Widget::renderChildren()
 509 {
 510   std::list<Widget*>::iterator it, end = _children.end();
 511   for (it = _children.begin(); it != end; ++it)
 512     (*it)->render();
 513 }
 514
 515 void Widget::styleChanged(const RenderStyle &)
 516 {
 517   refresh();
 518 }
 519
 520 void Widget::exposeHandler(const XExposeEvent &e)
 521 {
 522   EventHandler::exposeHandler(e);
 523   XClearArea(**display, _window, e.x, e.y, e.width, e.height, false);
 524 }
 525
 526 void Widget::configureHandler(const XConfigureEvent &e)
 527 {
 528   if (_ignore_config) {
 529     _ignore_config--;
 530   } else {
 531     // only interested in these for top level windows
 532     if (_parent) return;
 533
 534     XEvent ev;
 535     ev.xconfigure.width = e.width;
 536     ev.xconfigure.height = e.height;
 537     while (XCheckTypedWindowEvent(**display, window(), ConfigureNotify, &ev));
 538
 539     if (!(ev.xconfigure.width == area().width() &&
 540           ev.xconfigure.height == area().height())) {
 541       _area = Rect(_area.position(), Size(e.width, e.height));
 542       update();
 543     }
 544   }
 545 }
 546
 547 }