com.google.gwt.dom.client

## Class CanvasElement

- java.lang.Object
- - com.google.gwt.core.client.JavaScriptObject
  - - com.google.gwt.dom.client.Node
    - - com.google.gwt.dom.client.Element
      - - com.google.gwt.dom.client.CanvasElement

-     @TagName(value="canvas")
      public class CanvasElement
      extends Element

  Canvas element.
  See Also:
    W3C HTML 5 Specification

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static java.lang.String` | `TAG` The tag for this element.

    - ### Fields inherited from class com.google.gwt.dom.client.Element

      `DRAGGABLE_AUTO, DRAGGABLE_FALSE, DRAGGABLE_TRUE`

    - ### Fields inherited from class com.google.gwt.dom.client.Node

      `DOCUMENT_NODE, ELEMENT_NODE, TEXT_NODE`

  - ### Constructor Summary

    Constructors
    Modifier | Constructor and Description
    --- | ---
    `protected` | `CanvasElement()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `Context` | `getContext(java.lang.String contextId)` Gets the rendering context that may be used to draw on this canvas.
    `Context2d` | `getContext2d()` Returns a 2D rendering context.
    `int` | `getHeight()` Gets the height of the canvas.
    `int` | `getWidth()` Gets the width of the canvas.
    `void` | `setHeight(int height)` Sets the height of the canvas.
    `void` | `setWidth(int width)` Sets the width of the canvas.
    `java.lang.String` | `toDataUrl()` Returns a data URL for the current content of the canvas element.
    `java.lang.String` | `toDataUrl(java.lang.String type)` Returns a data URL for the current content of the canvas element, with a specified type.

    - ### Methods inherited from class com.google.gwt.dom.client.Element

      `addClassName, as, as, blur, dispatchEvent, focus, getAbsoluteBottom, getAbsoluteLeft, getAbsoluteRight, getAbsoluteTop, getAttribute, getClassName, getClientHeight, getClientWidth, getDir, getDraggable, getElementsByTagName, getFirstChildElement, getId, getInnerHTML, getInnerText, getLang, getNextSiblingElement, getOffsetHeight, getOffsetLeft, getOffsetParent, getOffsetTop, getOffsetWidth, getPreviousSiblingElement, getPropertyBoolean, getPropertyDouble, getPropertyInt, getPropertyJSO, getPropertyObject, getPropertyString, getScrollHeight, getScrollLeft, getScrollTop, getScrollWidth, getString, getStyle, getTabIndex, getTagName, getTitle, hasAttribute, hasTagName, indexOfName, is, is, removeAttribute, removeClassName, replaceClassName, scrollIntoView, setAttribute, setClassName, setDir, setDraggable, setId, setInnerHTML, setInnerSafeHtml, setInnerText, setLang, setPropertyBoolean, setPropertyDouble, setPropertyInt, setPropertyJSO, setPropertyObject, setPropertyString, setScrollLeft, setScrollTop, setTabIndex, setTitle`

    - ### Methods inherited from class com.google.gwt.dom.client.Node

      `appendChild, cloneNode, getChild, getChildCount, getChildNodes, getFirstChild, getLastChild, getNextSibling, getNodeName, getNodeType, getNodeValue, getOwnerDocument, getParentElement, getParentNode, getPreviousSibling, hasChildNodes, hasParentElement, insertAfter, insertBefore, insertFirst, isOrHasChild, removeChild, removeFromParent, replaceChild, setNodeValue`

    - ### Methods inherited from class com.google.gwt.core.client.JavaScriptObject

      `cast, createArray, createFunction, createObject, equals, hashCode, toSource, toString`

    - ### Methods inherited from class java.lang.Object

      `clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

- - ### Field Detail

    - #### TAG

          public static final java.lang.String TAG

      The tag for this element.
      See Also:
        Constant Field Values

  - ### Constructor Detail

    - #### CanvasElement

          protected CanvasElement()

  - ### Method Detail

    - #### getContext

          public final Context getContext(java.lang.String contextId)

      Gets the rendering context that may be used to draw on this canvas.
      Parameters:
        `contextId` - the context id as a String
      Returns:
        the canvas rendering context

    - #### getContext2d

          public final Context2d getContext2d()

      Returns a 2D rendering context. This is a convenience method, see `getContext(String)`.
      Returns:
        a 2D canvas rendering context

    - #### getHeight

          public final int getHeight()

      Gets the height of the canvas.
      Returns:
        the height, in pixels
      See Also:
        `setHeight(int)`

    - #### getWidth

          public final int getWidth()

      Gets the width of the canvas.
      Returns:
        the width, in pixels
      See Also:
        `setWidth(int)`

    - #### setHeight

          public final void setHeight(int height)

      Sets the height of the canvas.
      Parameters:
        `height` - the height, in pixels
      See Also:
        `getHeight()`

    - #### setWidth

          public final void setWidth(int width)

      Sets the width of the canvas.
      Parameters:
        `width` - the width, in pixels
      See Also:
        `getWidth()`

    - #### toDataUrl

          public final java.lang.String toDataUrl()

      Returns a data URL for the current content of the canvas element.
      Returns:
        a data URL for the current content of this element.

    - #### toDataUrl

          public final java.lang.String toDataUrl(java.lang.String type)

      Returns a data URL for the current content of the canvas element, with a specified type.
      Parameters:
        `type` - the type of the data url, e.g., image/jpeg or image/png.
      Returns:
        a data URL for the current content of this element with the specified type.