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org.zaval.lw
Class LwImgRender

java.lang.Object
  |
  +--org.zaval.lw.LwView
        |
        +--org.zaval.lw.LwRender
              |
              +--org.zaval.lw.LwImgRender
All Implemented Interfaces:
Validationable

public class LwImgRender
extends LwRender

This class implements image render that knows how to draw the target java.awt.Image object. It is possible to render whole image or only specified part of the targer image object.


Fields inherited from class org.zaval.lw.LwView
MOSAIC, ORIGINAL, STRETCH
 
Constructor Summary
LwImgRender(java.awt.Image img, int type)
          Constructs the render with the specified target image and the view type.
LwImgRender(java.awt.Image img, int x, int y, int w, int h, int type)
          Constructs the render with the specified target image, the view type and the specified rectangular image part that should be rendered.
LwImgRender(java.lang.String name)
          Constructs the render with the specified target image name.
LwImgRender(java.lang.String name, int type)
          Constructs the render with the specified target image name and the view type.
LwImgRender(java.lang.String name, int x, int y, int w, int h, int type)
          Constructs the render with the specified target image name, the view type and the specified rectangular image part that should be rendered.
 
Method Summary
protected  java.awt.Dimension calcPreferredSize()
          Calculates and returns the view preferred size.
 java.awt.Image getImage()
          Gets the target image object that is painted with the render.
 void paint(java.awt.Graphics g, int x, int y, int w, int h, Layoutable d)
          Paints the view using the given width and height.
 
Methods inherited from class org.zaval.lw.LwRender
getTarget, setTarget, targetWasChanged
 
Methods inherited from class org.zaval.lw.LwView
getBottom, getLeft, getPreferredSize, getRight, getTop, getType, invalidate, isValid, ownerChanged, paint, recalc, setType, validate
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

LwImgRender

public LwImgRender(java.awt.Image img,
                   int type)
Constructs the render with the specified target image and the view type.
Parameters:
img - the specified target image to be rendered.
type - the specified view type.

LwImgRender

public LwImgRender(java.lang.String name)
Constructs the render with the specified target image name. The name is a path to the image file relatively LwVCL resources base (see the LwToolkit.getResourcesBase method) directory. The constructor sets MOSAIC view type as default.
Parameters:
name - the specified image name.

LwImgRender

public LwImgRender(java.lang.String name,
                   int type)
Constructs the render with the specified target image name and the view type. The name is a path to the image file relatively LwVCL resources base (see the LwToolkit.getResourcesBase method) directory.
Parameters:
name - the specified image name.
type - the specified view type.

LwImgRender

public LwImgRender(java.lang.String name,
                   int x,
                   int y,
                   int w,
                   int h,
                   int type)
Constructs the render with the specified target image name, the view type and the specified rectangular image part that should be rendered.
Parameters:
name - the specified target image name.
x - the x coordinate of the top left corner the rendered part of the image.
y - the y coordinate of the top left corner the rendered part of the image.
w - the width the rendered part of the image.
h - the height the rendered part of the image.
type - the specified view type.

LwImgRender

public LwImgRender(java.awt.Image img,
                   int x,
                   int y,
                   int w,
                   int h,
                   int type)
Constructs the render with the specified target image, the view type and the specified rectangular image part that should be rendered.
Parameters:
img - the specified target image to be rendered.
x - the x coordinate of the top left corner the rendered part of the image.
y - the y coordinate of the top left corner the rendered part of the image.
w - the width the rendered part of the image.
h - the height the rendered part of the image.
type - the specified view type.
Method Detail

getImage

public java.awt.Image getImage()
Gets the target image object that is painted with the render.
Returns:
a target image object.

paint

public void paint(java.awt.Graphics g,
                  int x,
                  int y,
                  int w,
                  int h,
                  Layoutable d)
Paints the view using the given width and height. The location where the view has to be painted is determined with x and y coordinates.
Overrides:
paint in class LwView
Parameters:
g - the specified context to be used for painting.
x - the x coordinate.
y - the y coordinate.
w - the width of the view.
h - the height of the view.
d - the owner component.

calcPreferredSize

protected java.awt.Dimension calcPreferredSize()
Calculates and returns the view preferred size. The render returns the target image size as the "pure" preferred size.
Overrides:
calcPreferredSize in class LwView
Returns:
a "pure" preferred size of the view.
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