class Block

Instantiates and returns a new instance of jsx3.vector.Canvas. The implementation of createVector() in this class calls this method to create the base vector tag. This method may be overridden to provide a base tag of another type that Canvas.

Creates the vector tag tree that will render this GUI control. Subclasses of this class should override this method to specify the manner in which they render.

The basic template for a method overriding this method is:

CustomVector.prototype.createVector = function() {
  var objCanvas = this.jsxsuper();
  // modify objCanvas, add children, etc.
  return objCanvas;
};

This method should do the work of creating and updating the vector tree to the state when it is ready to be rendered on screen, but without calling updateVector() directly.

Returns the vector canvas on which this control paints itself. If no canvas has already been created, then createVector() is called to create it.

Renders a cross-platform vector event handler. When an event of type strEvtType bubbles up to the HTML element rendered by objElm, the instance method of this object whose name is strMethod will be called with two parameters: the browser event wrapped in an instance of jsx3.gui.Event, and the native HTMLElement that defined the event handler.

Updates the pre-existing vector tree of this control on, for example, a resize or repaint event. Methods overriding this method should return true if the update is successful or false to force the vector tree to be completely recreated with createVector().

The basic template for a method overriding this method is:

CustomVector.prototype.updateVector = function(objVector) {
  this.jsxsuper(objVector);
  // modify objCanvas, modify children, etc.
  return true;
};