C++ DomElement::addChild方法代码示例

DomElement *WPaintedWidget::createDomElement(WApplication *app)
{
  createPainter();

  DomElement *result = DomElement::createNew(domElementType());
  setId(result, app);

  DomElement *wrap = result;

  if (width().isAuto() && height().isAuto()) {
    result->setProperty(PropertyStylePosition, "relative");

    wrap = DomElement::createNew(DomElement_DIV);
    wrap->setProperty(PropertyStylePosition, "absolute");
    wrap->setProperty(PropertyStyleLeft, "0");
    wrap->setProperty(PropertyStyleRight, "0");
  }

  DomElement *canvas = DomElement::createNew(DomElement_DIV);

  if (!app->environment().agentIsSpiderBot())
    canvas->setId('p' + id());

  WPaintDevice *device = painter_->getPaintDevice(false);

  //handle the widget correctly when inline and using VML 
  if (painter_->renderType() == WWidgetPainter::InlineVml && isInline()) {
    result->setProperty(PropertyStyle, "zoom: 1;");
    canvas->setProperty(PropertyStyleDisplay, "inline");
    canvas->setProperty(PropertyStyle, "zoom: 1;");
  }

  if (renderWidth_ != 0 && renderHeight_ != 0) {
    paintEvent(device);

#ifdef WT_TARGET_JAVA
    if (device->painter())
      device->painter()->end();
#endif // WT_TARGET_JAVA
  }

  painter_->createContents(canvas, device);

  needRepaint_ = false;

  wrap->addChild(canvas);
  if (wrap != result)
    result->addChild(wrap);

  updateDom(*result, true);

  return result;
}

DomElement *WTable::createDomElement(WApplication *app)
{
  bool withIds = !app->environment().agentIsSpiderBot();

  DomElement *table = DomElement::createNew(domElementType());
  setId(table, app);

  DomElement *thead = 0;
  if (headerRowCount_ != 0) {
    thead = DomElement::createNew(DomElement_THEAD);
    if (withIds)
      thead->setId(id() + "th");
  }

  DomElement *tbody = DomElement::createNew(DomElement_TBODY);
  if (withIds)
    tbody->setId(id() + "tb");

  for (unsigned col = 0; col < columns_.size(); ++col) {
    DomElement *c = DomElement::createNew(DomElement_COL);
    if (withIds)
      c->setId(columns_[col]->id());
    columns_[col]->updateDom(*c, true);
    table->addChild(c);
  }
  
  flags_.reset(BIT_COLUMNS_CHANGED);

  for (unsigned row = 0; row < (unsigned)rowCount(); ++row)
    for (unsigned col = 0; col < (unsigned)columnCount(); ++col)
      itemAt(row, col).overSpanned = false;
  
  for (unsigned row = 0; row < (unsigned)rowCount(); ++row) {
    DomElement *tr = createRow(row, withIds, app);
    if (row < static_cast<unsigned>(headerRowCount_))
      thead->addChild(tr);
    else
      tbody->addChild(tr);
  }
  rowsAdded_ = 0;

  if (thead)
    table->addChild(thead);
  table->addChild(tbody);

  updateDom(*table, true);

  flags_.reset(BIT_GRID_CHANGED);
  delete rowsChanged_;
  rowsChanged_ = 0;

  return table;
}

DomElement *WGLWidget::createDomElement(WApplication *app)
{
  DomElement *result = 0;
  if (app->environment().agentIsIElt(9) ||
      app->environment().agent() == WEnvironment::MobileWebKitAndroid) {
    // Shortcut: IE misbehaves when it encounters a canvas element
    result = DomElement::createNew(DomElement_DIV);
    if (alternative_)
      result->addChild(alternative_->createSDomElement(app));
  } else {
    result = DomElement::createNew(DomElement_CANVAS);;
    if (alternative_) {
      result->addChild(alternative_->createSDomElement(app));
    }
  }
  setId(result, app);

  std::stringstream tmp;
    tmp <<
      "{\n"
      """var o = new " WT_CLASS ".WGLWidget(" << app->javaScriptClass() << "," << jsRef() << ");\n"
      """o.discoverContext(function(){" << webglNotAvailable_.createCall() << "});\n";

    js_.str("");
    initializeGL();
    tmp <<
      """o.initializeGL=function(){\n"
      //"""debugger;\n"
      """var obj=" << glObjJsRef() << ";\n"
      """var ctx=obj.ctx; if(!ctx) return;\n" <<
      "" << js_.str() <<
      """obj.initialized = true;\n"
      // updates are queued until initialization is complete
      """var key;\n"
      """for(key in obj.updates) obj.updates[key]();\n"
      """obj.updates = new Array();\n"
      // Similar, resizeGL is not executed until initialized
      """obj.resizeGL();\n"
      "};\n"
      "}\n";
  tmp << delayedJavaScript_.str();
  delayedJavaScript_.str("");
  result->callJavaScript(tmp.str());

  repaintGL(PAINT_GL | RESIZE_GL);

  updateDom(*result, true);


  return result;
}

void WFileUpload::updateDom(DomElement& element, bool all)
{
  bool containsProgress = progressBar_ && progressBar_->parent() == this;
  DomElement *inputE = 0;

  if (element.type() != DomElement_INPUT
      && flags_.test(BIT_DO_UPLOAD)
      && containsProgress && !progressBar_->isRendered())
    element.addChild(progressBar_->createSDomElement(WApplication::instance()));

  // upload() + disable() does not work. -- fix after this release,
  // change order of javaScript_ and properties rendering in DomElement

  if (fileUploadTarget_ && flags_.test(BIT_DO_UPLOAD)) {
    element.callMethod("submit()");
    flags_.reset(BIT_DO_UPLOAD);

    if (containsProgress) {
      inputE = DomElement::getForUpdate("in" + id(), DomElement_INPUT);
      inputE->setProperty(PropertyStyleDisplay, "none");
    }
  }

  if (flags_.test(BIT_ENABLED_CHANGED)) {
    if (!inputE)
      inputE = DomElement::getForUpdate("in" + id(), DomElement_INPUT);

    if (isDisabled())
      inputE->callMethod("disabled=true");
    else
      inputE->callMethod("disabled=false");

    flags_.reset(BIT_ENABLED_CHANGED);
  }

  EventSignal<> *change = voidEventSignal(CHANGE_SIGNAL, false);
  if (change && change->needsUpdate(all)) {
    if (!inputE)
      inputE = DomElement::getForUpdate("in" + id(), DomElement_INPUT);

    updateSignalConnection(*inputE, *change, "change", all);
  }

  if (inputE)
    element.addChild(inputE);

  WWebWidget::updateDom(element, all);
}

void WAbstractMedia::getDomChanges(std::vector<DomElement *>& result,
				   WApplication *app)
{
  if (!mediaId_.empty()) {
    DomElement *media = DomElement::getForUpdate(mediaId_, DomElement_DIV);
    updateMediaDom(*media, false);
    if (sourcesChanged_) {
      // Updating source elements seems to be ill-supported in at least FF,
      // so we delete them all and reinsert them.
      // Delete source elements that are no longer required
      for (std::size_t i = 0; i < sourcesRendered_; ++i)
	media->callJavaScript
	  (WT_CLASS ".remove('" + mediaId_ + "s"
	   + boost::lexical_cast<std::string>(i) + "');",
	   true);
      sourcesRendered_ = 0;
      for (std::size_t i = 0; i < sources_.size(); ++i) {
        DomElement *src = DomElement::createNew(DomElement_SOURCE);
        src->setId(mediaId_ + "s" + boost::lexical_cast<std::string>(i));
        renderSource(src, *sources_[i], i + 1 >= sources_.size());
        media->addChild(src);
      }
      sourcesRendered_ = sources_.size();
      sourcesChanged_ = false;
      // Explicitly request rerun of media selection algorithm
      // 4.8.9.2 says it should happen automatically, but FF doesn't
      media->callJavaScript(jsMediaRef() + ".load();");
    }
    result.push_back(media);
  }
  WInteractWidget::getDomChanges(result, app);
}

void WComboBox::updateDom(DomElement& element, bool all)
{
  if (itemsChanged_ || all) {
    if (!all)
      element.removeAllChildren();

    for (unsigned i = 0; i < items_.size(); ++i) {
      DomElement *item = DomElement::createNew(DomElement::OPTION);
      item->setAttribute("value", boost::lexical_cast<std::string>(i));
      item->setProperty(Wt::PropertyInnerHTML, items_[i]);
      if ((int)i == currentIndex_)
	item->setProperty(Wt::PropertySelected, "true");

      element.addChild(item);
    }

    itemsChanged_ = false;
  }

  if (selectionChanged_) {
    element.setProperty(Wt::PropertySelectedIndex,
			boost::lexical_cast<std::string>(currentIndex_));
    selectionChanged_ = false;
  }

  const WSignalInstance_ *s1 = getSignal(SIGNAL(activated(int)));
  const WSignalInstance_ *s2 = getSignal(SIGNAL(activated(const std::string)));
  if (isConnected(s1) || isConnected(s2))
    connect(this, SIGNAL(changed()), this, SLOT(propagateChanged()));

  WFormWidget::updateDom(element, all);

  renderOk();
}

void PaintedSlider::doUpdateDom(DomElement& element, bool all)
{
  if (all) {
    WApplication *app = WApplication::instance();

    element.addChild(createSDomElement(app));
    element.addChild(((WWebWidget *)handle_)->createSDomElement(app));

    DomElement *west = DomElement::createNew(DomElement_DIV);
    west->setProperty(PropertyClass, "Wt-w");
    element.addChild(west);

    DomElement *east = DomElement::createNew(DomElement_DIV);
    east->setProperty(PropertyClass, "Wt-e");
    element.addChild(east);
  }
}

void WPaintedWidget::updateDom(DomElement& element, bool all)
{
  if ((all && areaImage_) || areaImageAdded_) {
    element.addChild(areaImage_->createSDomElement(WApplication::instance()));
    areaImageAdded_ = false;
  }

  WInteractWidget::updateDom(element, all);
}

void WProgressBar::updateDom(DomElement& element, bool all)
{
  DomElement *bar = 0, *label = 0;

  if (all) {
    WApplication *app = WApplication::instance();

    bar = DomElement::createNew(DomElement_DIV);
    bar->setId("bar" + id());
    bar->setProperty(PropertyClass, valueStyleClass_);
    app->theme()->apply(this, *bar, ProgressBarBarRole);

    label = DomElement::createNew(DomElement_DIV);
    label->setId("lbl" + id());
    app->theme()->apply(this, *label, ProgressBarLabelRole);
  }

  if (changed_ || all) {
    if (!bar)
      bar = DomElement::getForUpdate("bar" + id(), DomElement_DIV);
    if (!label)
      label = DomElement::getForUpdate("lbl" + id(), DomElement_DIV);

    bar->setProperty(PropertyStyleWidth,
		     boost::lexical_cast<std::string>(percentage()) + "%");

    WString s = text();
    removeScript(s);

    label->setProperty(PropertyInnerHTML, s.toUTF8());

    changed_ = false;
  }

  if (bar)
    element.addChild(bar);

  if (label)
    element.addChild(label);

  WInteractWidget::updateDom(element, all);
}

void WImage::updateDom(DomElement& element, bool all)
{
  DomElement *img = &element;
  if (all && element.type() == DomElement_SPAN) {
    DomElement *map = map_->createSDomElement(WApplication::instance());
    element.addChild(map);

    img = DomElement::createNew(DomElement_IMG);
    img->setId("i" + id());
  }

  if (flags_.test(BIT_IMAGE_LINK_CHANGED) || all) {
    if (!imageLink_.isNull()) {
      std::string url = resolveRelativeUrl(imageLink_.url());

      WApplication *app = WApplication::instance();
      url = app->encodeUntrustedUrl(url);

      img->setProperty(Wt::PropertySrc, url);
    } else
      img->setProperty(Wt::PropertySrc, "#");

    flags_.reset(BIT_IMAGE_LINK_CHANGED);
  }

  if (flags_.test(BIT_ALT_TEXT_CHANGED) || all) {
    img->setAttribute("alt", altText_.toUTF8());
    flags_.reset(BIT_ALT_TEXT_CHANGED);
  }

  if (flags_.test(BIT_MAP_CREATED) || (all && map_)) {
    img->setAttribute("usemap", '#' + map_->id());
    flags_.reset(BIT_MAP_CREATED);
  }

  WInteractWidget::updateDom(*img, all);

  if (&element != img)
    element.addChild(img);
}

void WAbstractMedia::updateMediaDom(DomElement& element, bool all)
{
  // Only if not IE
  if (all && alternative_) {
    element.setAttribute("onerror",
      """if(event.target.error && event.target.error.code=="
      ""   "event.target.error.MEDIA_ERR_SRC_NOT_SUPPORTED){"
      ""  "while (this.hasChildNodes())"
      ""    "if (" WT_CLASS ".hasTag(this.firstChild,'SOURCE')){"
      ""      "this.removeChild(this.firstChild);"
      ""    "}else{"
      ""      "this.parentNode.insertBefore(this.firstChild, this);"
      ""    "}"
      ""  "this.style.display= 'none';"
      """}"
      );
  }
  if (all || flagsChanged_) {
    if ((!all) || flags_.test(PlayerOption::Controls))
      element.setAttribute("controls",
			   flags_.test(PlayerOption::Controls) ? "controls" : "");
    if ((!all) || flags_.test(PlayerOption::Autoplay))
      element.setAttribute("autoplay",
			   flags_.test(PlayerOption::Autoplay) ? "autoplay" : "");
    if ((!all) || flags_.test(PlayerOption::Loop))
      element.setAttribute("loop",
			   flags_.test(PlayerOption::Loop) ? "loop" : "");
  }
  if (all || preloadChanged_) {
    switch (preloadMode_) {
    case MediaPreloadMode::None:
      element.setAttribute("preload", "none");
      break;
    default:
    case MediaPreloadMode::Auto:
      element.setAttribute("preload", "auto");
      break;
    case MediaPreloadMode::Metadata:
      element.setAttribute("preload", "metadata");
      break;
    }
  }

  updateEventSignals(element, all);

  if (all)
    if (alternative_) {
      element.addChild(alternative_->createSDomElement(wApp));
    }
  flagsChanged_ = preloadChanged_ = false;
}

void WTable::getDomChanges(std::vector<DomElement *>& result,
			   WApplication *app)
{
  DomElement *e = DomElement::getForUpdate(this, domElementType());

  if (!isStubbed() && flags_.test(BIT_GRID_CHANGED)) {
    DomElement *newE = createDomElement(app);
    e->replaceWith(newE);
  } else {
    if (rowsChanged_) {
      for (std::set<WTableRow *>::iterator i = rowsChanged_->begin();
	   i != rowsChanged_->end(); ++i) {
	DomElement *e2 = DomElement::getForUpdate(*i, DomElement_TR);
	(*i)->updateDom(*e2, false);
	result.push_back(e2);
      }

      delete rowsChanged_;
      rowsChanged_ = 0;
    }

    if (rowsAdded_) {
      DomElement *etb = DomElement::getForUpdate(id() + "tb",
						 DomElement_TBODY);
      for (unsigned i = 0; i < static_cast<unsigned>(rowsAdded_); ++i) {
        DomElement *tr = createRowDomElement(rowCount() - rowsAdded_ + i, true, app);
	etb->addChild(tr);
      }

      result.push_back(etb);

      rowsAdded_ = 0;
    }

    if (flags_.test(BIT_COLUMNS_CHANGED)) {
	for (unsigned i = 0; i < columns_.size(); ++i) {
	  DomElement *e2
	    = DomElement::getForUpdate(columns_[i], DomElement_COL);
	  columns_[i]->updateDom(*e2, false);
	  result.push_back(e2);
	}

      flags_.reset(BIT_COLUMNS_CHANGED);
    }

    updateDom(*e, false);
  }

  result.push_back(e);
}

void WGroupBox::updateDom(DomElement& element, bool all)
{
  if (all || titleChanged_) {
    DomElement *legend;
    if (all) {
      legend = DomElement::createNew(DomElement_LEGEND);
      legend->setId(id() + "l");
    } else
      legend = DomElement::getForUpdate(id() + "l", DomElement_LEGEND);

    legend->setProperty(Wt::PropertyInnerHTML, escapeText(title_).toUTF8());
    element.addChild(legend);

    titleChanged_ = false;
  }

  WContainerWidget::updateDom(element, all);
}

DomElement *WGLWidget::createDomElement(WApplication *app)
{
  DomElement *result = nullptr;

  if (!pImpl_) { // no GL support whatsoever
    result = DomElement::createNew(DomElementType::DIV);
    result->addChild(alternative_->createSDomElement(app));
    webGlNotAvailable_ = true;
  } else {
    result = DomElement::createNew(domElementType());
    repaintGL(GLClientSideRenderer::PAINT_GL | GLClientSideRenderer::RESIZE_GL);
  }
  setId(result, app);

  updateDom(*result, true);

  return result;
}

void WContainerWidget::updateDomChildren(DomElement& parent, WApplication *app)
{
  if (!app->session()->renderer().preLearning() && !layout_) {
    if (parent.mode() == DomElement::ModeUpdate)
      parent.setWasEmpty(wasEmpty());

    if (transientImpl_) {
      std::vector<int> orderedInserts;
      std::vector<WWidget *>& ac = transientImpl_->addedChildren_;

      for (unsigned i = 0; i < ac.size(); ++i)
	orderedInserts.push_back(Utils::indexOf(*children_, ac[i]));

      Utils::sort(orderedInserts);

      int addedCount = transientImpl_->addedChildren_.size();
      int totalCount = children_->size();
      int insertCount = 0;
      for (unsigned i = 0; i < orderedInserts.size(); ++i) {
	int pos = orderedInserts[i];
	
	DomElement *c = (*children_)[pos]->createSDomElement(app);

	if (pos + (addedCount - insertCount) == totalCount)
	  parent.addChild(c);
	else
	  parent.insertChildAt(c, pos + firstChildIndex());

	++insertCount;
      }

      transientImpl_->addedChildren_.clear();
    }
  }

#ifndef WT_NO_LAYOUT
  if (flags_.test(BIT_LAYOUT_NEEDS_UPDATE)) {
    if (layout_)
      layoutImpl()->updateDom(parent);

    flags_.reset(BIT_LAYOUT_NEEDS_UPDATE);
  }
#endif // WT_NO_LAYOUT
}