org.jogamp.glg2d

Interface G2DDrawingHelper

All Known Subinterfaces:

GLG2DColorHelper, GLG2DImageHelper, GLG2DShapeHelper, GLG2DTextHelper, GLG2DTransformHelper

All Known Implementing Classes:

AbstractColorHelper, AbstractImageHelper, AbstractMatrixHelper, AbstractShapeHelper, AbstractTextDrawer, GL2ColorHelper, GL2ES2ColorHelper, GL2ES2ImageDrawer, GL2ES2ShapeDrawer, GL2ES2TextDrawer, GL2ES2TransformHelper, GL2ImageDrawer, GL2ShapeDrawer, GL2StringDrawer, GL2Transformhelper

public interface G2DDrawingHelper

Assists in the drawing of a particular aspect of the Graphics2D object. This allows the drawing to be segregated into certain aspects, such as image, text or shape drawing.

Method Summary

Methods

Modifier and Type	Method and Description
void	dispose() Disposes the helper object.
void	pop(GLGraphics2D parentG2d) Sets the new GLGraphics2D context in a stack after a pop.
void	push(GLGraphics2D newG2d) Sets the new GLGraphics2D context in a stack.
void	resetHints() Clears all hints back to their default states.
void	setG2D(GLGraphics2D g2d) Sets the current GLGraphics2D parent.
void	setHint(RenderingHints.Key key, Object value) Sets a new rendering hint.

Method Detail

setG2D

void setG2D(GLGraphics2D g2d)

Sets the current GLGraphics2D parent. The current GL and GLContext objects can be accessed from this. This should clear all internal stacks in the helper object because previous painting iterations may not have called dispose() for each time they called create().

Parameters:

g2d - The parent context for subsequent drawing operations.

push

void push(GLGraphics2D newG2d)

Sets the new GLGraphics2D context in a stack. This is called when Graphics2D.create() is called and each helper is given notice to push any necessary information onto the stack. This is used in conjunction with pop(GLGraphics2D).

Parameters:

newG2d - The new context, top of the stack.

pop

void pop(GLGraphics2D parentG2d)

Sets the new GLGraphics2D context in a stack after a pop. This is called when Graphics2D.dispose() is called and each helper is given notice to pop any necessary information off the stack. This is used in conjunction with push(GLGraphics2D).

Parameters:

parentG2d - The new context, top of the stack - which is actually the parent of what was popped.

setHint

void setHint(RenderingHints.Key key,
           Object value)

Sets a new rendering hint. The state of all rendering hints is kept by the GLGraphics2D object, but all new state changes are propagated to all listeners.

Parameters:

key - The rendering hint key.

value - The new hint value.

resetHints

void resetHints()

Clears all hints back to their default states.

dispose

void dispose()

Disposes the helper object. This is not called during the dispose operation of the Graphics2D object. This should dispose all GL resources when all drawing is finished and no more calls will be executing on this OpenGL context and these resources.