C++ (Cpp) WCanvasPaintDevice示例

示例#1

文件： WPaintedWidget.C 项目： gokulavasan/wt

void WWidgetCanvasPainter::updateContents(std::vector<DomElement *>& result,
					  WPaintDevice *device)
{
  WCanvasPaintDevice *canvasDevice = dynamic_cast<WCanvasPaintDevice *>(device);

  if (widget_->sizeChanged_) {
    DomElement *canvas = DomElement::getForUpdate('c' + widget_->id(),
						  DomElement_CANVAS);
    canvas->setAttribute("width",
		 boost::lexical_cast<std::string>(widget_->renderWidth_));
    canvas->setAttribute("height",
		 boost::lexical_cast<std::string>(widget_->renderHeight_));
    result.push_back(canvas);

    widget_->sizeChanged_ = false;
  }

  bool domText = canvasDevice->textMethod() == WCanvasPaintDevice::DomText;

  DomElement *el
    = DomElement::getForUpdate(domText ? 't' + widget_->id() : widget_->id(),
			       DomElement_DIV);
  if (domText)
    el->removeAllChildren();

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

  result.push_back(el);

  delete device;
}

示例#2

文件： WPaintedWidget.C 项目： bvanhauwaert/wt

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;
}

示例#3

文件： WPaintedWidget.C 项目： pgquiles/wt

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;
}

示例#4

文件： WPaintedWidget.C 项目： pgquiles/wt

void WWidgetCanvasPainter::updateContents(std::vector<DomElement *>& result,
					  WPaintDevice *device)
{
  WCanvasPaintDevice *canvasDevice = dynamic_cast<WCanvasPaintDevice *>(device);

  if (widget_->sizeChanged_) {
    DomElement *canvas = DomElement::getForUpdate('c' + widget_->id(),
						  DomElement_CANVAS);
    canvas->setAttribute("width",
		 boost::lexical_cast<std::string>(widget_->renderWidth_));
    canvas->setAttribute("height",
		 boost::lexical_cast<std::string>(widget_->renderHeight_));
    result.push_back(canvas);

    widget_->sizeChanged_ = false;
  }

  bool domText = canvasDevice->textMethod() == WCanvasPaintDevice::DomText;

  DomElement *el
    = DomElement::getForUpdate(domText ? 't' + widget_->id() : widget_->id(),
			       DomElement_DIV);
  if (domText)
    el->removeAllChildren();

  bool hasJsObjects = widget_->jsObjects_.size() > 0;

  if (hasJsObjects) {
    WStringStream ss;
    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());
  }

  result.push_back(el);

  delete device;
}