C++ DomElement::setId方法代码示例

void WWidgetCanvasPainter::createContents(DomElement *result,
					  WPaintDevice *device)
{
  std::string wstr = boost::lexical_cast<std::string>(widget_->renderWidth_);
  std::string hstr = boost::lexical_cast<std::string>(widget_->renderHeight_);

  result->setProperty(PropertyStylePosition, "relative");
  result->setProperty(PropertyStyleOverflowX, "hidden");

  DomElement *canvas = DomElement::createNew(DomElement_CANVAS);
  canvas->setId('c' + widget_->id());
  canvas->setProperty(PropertyStyleDisplay, "block");
  canvas->setAttribute("width", wstr);
  canvas->setAttribute("height", hstr);
  result->addChild(canvas);

  WCanvasPaintDevice *canvasDevice = dynamic_cast<WCanvasPaintDevice *>(device);

  DomElement *text = 0;
  if (canvasDevice->textMethod() == WCanvasPaintDevice::DomText) {
    text = DomElement::createNew(DomElement_DIV);
    text->setId('t' + widget_->id());
    text->setProperty(PropertyStylePosition, "absolute");
    text->setProperty(PropertyStyleZIndex, "1");
    text->setProperty(PropertyStyleTop, "0px");
    text->setProperty(PropertyStyleLeft, "0px");
  }

  canvasDevice->render("c" + widget_->id(), text ? text : result);

  if (text)
    result->addChild(text);

  delete device;
}

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");

  DomElement *colgroup = DomElement::createNew(DomElement_COLGROUP);

  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);
    colgroup->addChild(c);
  }

  table->addChild(colgroup);
  
  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 = createRowDomElement(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;
}

void WWidgetCanvasPainter::createContents(DomElement *result,
					  WPaintDevice *device)
{
  std::string wstr = boost::lexical_cast<std::string>(widget_->renderWidth_);
  std::string hstr = boost::lexical_cast<std::string>(widget_->renderHeight_);

  result->setProperty(PropertyStylePosition, "relative");
  result->setProperty(PropertyStyleOverflowX, "hidden");
  result->setProperty(PropertyStyleOverflowY, "hidden");

  DomElement *canvas = DomElement::createNew(DomElement_CANVAS);
  canvas->setId('c' + widget_->id());
  canvas->setProperty(PropertyStyleDisplay, "block");
  canvas->setAttribute("width", wstr);
  canvas->setAttribute("height", hstr);
  result->addChild(canvas);
  widget_->sizeChanged_ = false;

  WCanvasPaintDevice *canvasDevice = dynamic_cast<WCanvasPaintDevice *>(device);

  DomElement *text = 0;
  if (canvasDevice->textMethod() == WCanvasPaintDevice::DomText) {
    text = DomElement::createNew(DomElement_DIV);
    text->setId('t' + widget_->id());
    text->setProperty(PropertyStylePosition, "absolute");
    text->setProperty(PropertyStyleZIndex, "1");
    text->setProperty(PropertyStyleTop, "0px");
    text->setProperty(PropertyStyleLeft, "0px");
  }

  DomElement *el = text ? text : result;
  bool hasJsObjects = widget_->jsObjects_.size() > 0;

  if (hasJsObjects) {
    WStringStream ss;
    WApplication *app = WApplication::instance();
    ss << "new " WT_CLASS ".WPaintedWidget("
      << app->javaScriptClass() << "," << widget_->jsRef() << ");";
    widget_->jsObjects_.updateJs(ss);
    el->callJavaScript(ss.str());
  }

  canvasDevice->render('c' + widget_->id(), el);

  if (hasJsObjects) {
    WStringStream ss;
    ss << widget_->objJsRef() << ".repaint=function(){";
    ss << canvasDevice->recordedJs_.str();
    ss << "};";
    el->callJavaScript(ss.str());
  }

  if (text)
    result->addChild(text);

  delete device;
}

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);
}

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;
}

void WPushButton::updateDom(DomElement& element, bool all)
{
  if (all && element.type() == DomElement_BUTTON)
    element.setAttribute("type", "button");

  bool updateInnerHtml = !icon_.isNull() && flags_.test(BIT_TEXT_CHANGED);

  if (updateInnerHtml || flags_.test(BIT_ICON_CHANGED)
      || (all && !icon_.isNull())) {
    DomElement *image = DomElement::createNew(DomElement_IMG);
    image->setProperty(PropertySrc, icon_.resolveUrl(WApplication::instance()));
    image->setId("im" + formName());
    element.insertChildAt(image, 0);
    flags_.set(BIT_ICON_RENDERED);
    flags_.reset(BIT_ICON_CHANGED);
  }

  if (flags_.test(BIT_TEXT_CHANGED) || all) {
    element.setProperty(Wt::PropertyInnerHTML, text_.formattedText());

    flags_.reset(BIT_TEXT_CHANGED);
  }

  // bool needsUrlResolution = false;

  if (flags_.test(BIT_LINK_CHANGED) || all) {
    if (element.type() == DomElement_A) {
      /* needsUrlResolution = */ WAnchor::renderHRef(this, linkState_, element);
      WAnchor::renderHTarget(linkState_, element, all);
    } else
      renderHRef(element);

    flags_.reset(BIT_LINK_CHANGED);
  }

  if (isCheckable()) {
    if (flags_.test(BIT_CHECKED_CHANGED) || all) {
      if (!all || flags_.test(BIT_IS_CHECKED)) {
	toggleStyleClass("active", flags_.test(BIT_IS_CHECKED), true);
      }

      flags_.reset(BIT_CHECKED_CHANGED);
    }
  }

  if (!all)
    WApplication::instance()->theme()->apply(this, element,
					     MainElementThemeRole);

  WFormWidget::updateDom(element, all);
}

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);
}

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 WWidgetRasterPainter::createContents(DomElement *result,
					  WPaintDevice *device)
{
  std::string wstr = boost::lexical_cast<std::string>(widget_->renderWidth_);
  std::string hstr = boost::lexical_cast<std::string>(widget_->renderHeight_);

  DomElement *img = DomElement::createNew(DomElement_IMG);
  img->setId('i' + widget_->id());
  img->setAttribute("width", wstr);
  img->setAttribute("height", hstr);
  img->setAttribute("class", "unselectable");
  img->setAttribute("unselectable", "on");
  img->setAttribute("onselectstart", "return false;");
  img->setAttribute("onmousedown", "return false;");

  WResource *resource = dynamic_cast<WResource *>(device);
  img->setAttribute("src", resource->generateUrl());

  result->addChild(img);
}

DomElement *WWebWidget::createSDomElement()
{
  if (hidden_ && wApp && wApp->loading()) {
    /*
     * just create a stub, but let the element believe that it is
     * up-to-date so that static slots are loaded correctly.
     */
    DomElement *real = createDomElement();
    delete real;

    stubbed_ = true;

    DomElement *stub = DomElement::createNew(DomElement::SPAN);
    stub->setId(this);
    return stub;
  } else {
    stubbed_ = false;
    return createDomElement();
  }
}

DomElement *WTable::createRowDomElement(int row, bool withIds, WApplication *app)
{
  DomElement *tr = DomElement::createNew(DomElement_TR);
  if (withIds)
    tr->setId(rows_[row]->id());
  rows_[row]->updateDom(*tr, true);

  // because of the mix of addChild() and insertChildAt()
  tr->setWasEmpty(false);
  int spanCounter = 0;

  for (int col = 0; col < columnCount(); ++col) {
    WTableRow::TableData& d = itemAt(row, col);

    if (!d.overSpanned) {
      DomElement *td = d.cell->createSDomElement(app);

      /*
       * So, IE gets confused when doing appendChild() for TH followed by
       * insertCell(-1) for TD. But, we cannot insertChild() for element 0,
       * so we do TH with appendChild, and insertCell(col).
       */
      if (col < headerColumnCount_ || row < headerRowCount_)
	tr->addChild(td);
      else
	tr->insertChildAt(td, col - spanCounter);

      for (int i = 0; i < d.cell->rowSpan(); ++i)
	for (int j = 0; j < d.cell->columnSpan(); ++j)
	  if (i + j > 0) {
	    itemAt(row + i, col + j).overSpanned = true;
	    itemAt(row + i, col + j).cell->setRendered(false);
	  }
    } else {
      spanCounter++;
    }
  }

  return tr;
}

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);
}

DomElement *WFileUpload::createDomElement(WApplication *app)
{
  DomElement *result = DomElement::createNew(domElementType());
  if (result->type() == DomElement_FORM)
    result->setId(id());
  else
    result->setName(id());

  EventSignal<> *change = voidEventSignal(CHANGE_SIGNAL, false);

  if (fileUploadTarget_) {
    DomElement *i = DomElement::createNew(DomElement_IFRAME);
    i->setProperty(PropertyClass, "Wt-resource");
    i->setProperty(PropertySrc, fileUploadTarget_->url());
    i->setName("if" + id());
    if (app->environment().agentIsIE()) {
      // http://msdn.microsoft.com/en-us/library/ms536474%28v=vs.85%29.aspx
      // HTA's (started by mshta.exe) have a different security model than
      // a normal web app, and therefore a HTA browser does not allow
      // interaction from iframes to the parent window unless this
      // attribute is set. If omitted, this causes the 'uploaded()'
      // signal to be blocked when a Wt app is executed as a HTA.
      i->setAttribute("APPLICATION", "yes");
    }

    DomElement *form = result;

    form->setAttribute("method", "post");
    form->setAttribute("action", fileUploadTarget_->url());
    form->setAttribute("enctype", "multipart/form-data");
    form->setProperty(PropertyStyle, "margin:0;padding:0;display:inline");
    form->setProperty(PropertyTarget, "if" + id());

    /*
     * wrap iframe in an extra span to work around bug in IE which does
     * not set the name use DOM methods
     */
    DomElement *d = DomElement::createNew(DomElement_SPAN);
    d->addChild(i);

    form->addChild(d);

    DomElement *input = DomElement::createNew(DomElement_INPUT);
    input->setAttribute("type", "file");
    if (flags_.test(BIT_MULTIPLE))
      input->setAttribute("multiple", "multiple");
    input->setAttribute("name", "data");
    input->setAttribute("size", boost::lexical_cast<std::string>(textSize_));
    input->setId("in" + id());

    if (!isEnabled())
      input->setProperty(Wt::PropertyDisabled, "true");

    if (change)
      updateSignalConnection(*input, *change, "change", true);

    form->addChild(input);

  } else {
    result->setAttribute("type", "file");
    if (flags_.test(BIT_MULTIPLE))
      result->setAttribute("multiple", "multiple");
    result->setAttribute("size", boost::lexical_cast<std::string>(textSize_));

    if (!isEnabled())
      result->setProperty(Wt::PropertyDisabled, "true");

    if (change)
      updateSignalConnection(*result, *change, "change", true);
  }

  updateDom(*result, true);

  flags_.reset(BIT_ENABLE_AJAX);

  return result;
}

void WContainerWidget::createDomChildren(DomElement& parent, WApplication *app)
{
  if (layout_) {
#ifndef WT_NO_LAYOUT
    bool fitWidth = contentAlignment_ & AlignJustify;
    bool fitHeight = !(contentAlignment_ & AlignVerticalMask);

    DomElement *c = layoutImpl()->createDomElement(fitWidth, fitHeight, app);

    /*
     * Take the hint: if the container is relative, then we can use an absolute
     * layout for its contents, under the assumption that a .wtResize or
     * auto-javascript sets the width too (like in WTreeView, WTableView)
     */
    if (positionScheme() == Relative || positionScheme() == Absolute) {
      c->setProperty(PropertyStylePosition, "absolute");
      c->setProperty(PropertyStyleLeft, "0");
      c->setProperty(PropertyStyleRight, "0");
    } else if (app->environment().agentIsIE()) {
      /*
       * position: relative element needs to be in a position: relative
       * parent otherwise scrolling is broken
       */
      if (app->environment().agentIsIE()
	  && this->parent()->positionScheme() != Static)
	parent.setProperty(PropertyStylePosition, "relative");
    }

    switch (contentAlignment_ & AlignHorizontalMask) {
    case AlignCenter: {
      DomElement *itable = DomElement::createNew(DomElement_TABLE);
      itable->setProperty(PropertyClass, "Wt-hcenter");
      if (fitHeight)
	itable->setProperty(PropertyStyle, "height:100%;");
      DomElement *irow = DomElement::createNew(DomElement_TR);
      DomElement *itd = DomElement::createNew(DomElement_TD);
      if (fitHeight)
	itd->setProperty(PropertyStyle, "height:100%;");
      itd->addChild(c);
      irow->addChild(itd);
      itable->addChild(irow);
      itable->setId(id() + "l");
      c = itable;

      break;
    }
    case AlignLeft:
      break;
    case AlignRight:
      c->setProperty(PropertyStyleFloat, "right");
      break;
    default:
      break;
    }

    parent.addChild(c);

    flags_.reset(BIT_LAYOUT_NEEDS_RERENDER);
#endif // WT_NO_LAYOUT
  } else {
    for (unsigned i = 0; i < children_->size(); ++i)
      parent.addChild((*children_)[i]->createSDomElement(app));
  }

  if (transientImpl_)
    transientImpl_->addedChildren_.clear();
}

DomElement *WAbstractMedia::createDomElement(WApplication *app)
{
  DomElement *result = 0;

  if (isInLayout()) {
    // It's easier to set WT_RESIZE_JS after the following code,
    // but if it's not set, the alternative content will think that
    // it is not included in a layout manager. Set some phony function
    // now, which will be overwritten later in this method.
    setJavaScriptMember(WT_RESIZE_JS, "function() {}");
  }

  if (app->environment().agentIsIElt(9) ||
      app->environment().agent() == WEnvironment::MobileWebKitAndroid) {
    // Shortcut: IE misbehaves when it encounters a media element
    result = DomElement::createNew(DomElement_DIV);
    if (alternative_)
      result->addChild(alternative_->createSDomElement(app));
  } else {
    DomElement *media = createMediaDomElement();
    DomElement *wrap = 0;
    if (isInLayout()) {
      media->setProperty(PropertyStylePosition, "absolute");
      media->setProperty(PropertyStyleLeft, "0");
      media->setProperty(PropertyStyleRight, "0");
      wrap = DomElement::createNew(DomElement_DIV);
      wrap->setProperty(PropertyStylePosition, "relative");
    }
    result = wrap ? wrap : media;
    if (wrap) {
      mediaId_ = id() + "_media";
      media->setId(mediaId_);
    } else {
      mediaId_ = id();
    }

    updateMediaDom(*media, true);
    // Create the 'source' elements
    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;

    if (wrap) {
      wrap->addChild(media);
    }
  }

  if (isInLayout()) {
    std::stringstream ss;
    ss <<
      """function(self, w, h) {";
    if (!mediaId_.empty()) {
      ss <<
        ""  "v=" + jsMediaRef() + ";"
        ""  "if (v) {"
	""    "if (w >= 0) "
        ""      "v.setAttribute('width', w);"
        ""    "if (h >= 0) "
	""      "v.setAttribute('height', h);"
        ""  "}";
    }
    if (alternative_) {
      ss <<
        """a=" + alternative_->jsRef() + ";"
        ""  "if (a && a." << WT_RESIZE_JS <<")"
        ""    "a." << WT_RESIZE_JS << "(a, w, h);";
    }
    ss
      <<"}";
    setJavaScriptMember(WT_RESIZE_JS, ss.str());
  }

  setId(result, app);
  updateDom(*result, true);

  if (isInLayout()) {
    result->setEvent(PLAYBACKSTARTED_SIGNAL, std::string());
    result->setEvent(PLAYBACKPAUSED_SIGNAL, std::string());
    result->setEvent(ENDED_SIGNAL, std::string());
    result->setEvent(TIMEUPDATED_SIGNAL, std::string());
    result->setEvent(VOLUMECHANGED_SIGNAL, std::string());
  }

  setJavaScriptMember("mediaId", "'" + mediaId_ + "'");

  return result;
}