com.realtime.crossfire.jxclient.gui.log

Class RenderStateManager

java.lang.Object

com.realtime.crossfire.jxclient.gui.log.RenderStateManager

public class RenderStateManager
extends java.lang.Object

Encapsulates the state for rendering a Buffer instance.

Constructor Summary

Constructors

Constructor and Description
RenderStateManager(@NotNull RenderStateListener renderStateListener, @NotNull Buffer buffer) Creates a new instance.

Method Summary

Modifier and Type	Method and Description
boolean	canScrollDown() Returns whether scrolling down is possible.
boolean	canScrollUp() Returns whether scrolling up is possible.
void	dispose() Destroys this instance.
int	getHeight() Returns the height of the viewable area.
int	getScrollPos() Returns the location of the view area in pixels.
int	getTopIndex() Returns the first line to render.
int	getTopOffset() Returns the number of pixels to shift the first displayed line.
void	resetScroll() Resets the scrolling range to default values.
void	scrollDown(int dy) Scrolls down by pixels.
void	scrollTo(int y) Scrolls to a location.
void	scrollUp(int dy) Scrolls up by pixels.
void	setHeight(int height) Sets the viewable height in pixel.
void	update(int oldBufferHeight) Updates the internal state after the buffer has changed.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RenderStateManager

public RenderStateManager(@NotNull
                          @NotNull RenderStateListener renderStateListener,
                          @NotNull
                          @NotNull Buffer buffer)

Creates a new instance.

Parameters:

renderStateListener - the listener to notify about state changes

buffer - the rendered buffer

Method Detail

setHeight

public void setHeight(int height)

Sets the viewable height in pixel.

Parameters:

height - the viewable height

update

public void update(int oldBufferHeight)

Updates the internal state after the buffer has changed.

Parameters:

oldBufferHeight - the buffer height before the change

dispose

public void dispose()

Destroys this instance. Must be called when the instance is not needed anymore.

getHeight

public int getHeight()

Returns the height of the viewable area.

Returns:

the height

getTopIndex

public int getTopIndex()

Returns the first line to render.

Returns:

the line index

getTopOffset

public int getTopOffset()

Returns the number of pixels to shift the first displayed line.

Returns:

the pixel offset

getScrollPos

public int getScrollPos()

Returns the location of the view area in pixels.

Returns:

the location

resetScroll

public void resetScroll()

Resets the scrolling range to default values.

scrollUp

public void scrollUp(int dy)

Scrolls up by pixels.

Parameters:

dy - the number of pixels to scroll

scrollDown

public void scrollDown(int dy)

Scrolls down by pixels.

Parameters:

dy - the number of pixels to scroll

scrollTo

public void scrollTo(int y)

Scrolls to a location.

Parameters:

y - the location

canScrollUp

public boolean canScrollUp()

Returns whether scrolling up is possible.

Returns:

whether scrolling up is possible

canScrollDown

public boolean canScrollDown()

Returns whether scrolling down is possible.

Returns:

whether scrolling down is possible