com.inet.html.views
Class ContentPainter

java.lang.Object
  com.inet.html.views.ContentPainter

Direct Known Subclasses:

RotationPainter

public class ContentPainter
extends java.lang.Object

This class is similar to the JRE GlyphView.GlyphPainter. But since HTML does not support tabs and has no predefined Break length, these parts of the functions are removed.

Constructor Summary

ContentPainter(ContentView view)
Creates the painter

Method Summary

ContentPainter	copy(ContentView target) Returns a copy of this painter
int	getAscent() Fetches the ascent above the baseline.
float[]	getCharOffsets() Returns the char offsets buffer of this painter.
int	getDescent() Fetches the descent below the baseline.
int	getHeight() Fetches the height of the font in PX
float	getSpan() Determines the span the glyphs given a start location (for tab expansion).
boolean	isCharOffsetsSet() If this returns true, the char offsets were set.
boolean	isReversed() Returns true if this painter paints an RTL content
java.awt.Shape	modelToView(int pos, javax.swing.text.Position.Bias bias, java.awt.Shape a) Returns the display shape for a model position
void	paint(java.awt.Graphics g, java.awt.Shape a, int start, int length, int baseline) Paints the glyphs representing the given range.
void	reset() Causes this painter to recalculate on the next run;
void	setCharOffsets(float[] charOffsets) Sets the char offset buffer of this painter
void	setReversed() Marks this painter als RTL.
void	setView(ContentView view) Sets the view this painter is bound to
void	sync() This method has to be called whenever there are changes to the render environment of the painted view.
int	viewToModel(float x, float y, java.awt.Shape a, javax.swing.text.Position.Bias[] biasReturn) Provides a mapping from the view coordinate space to the logical coordinate space of the model.

Methods inherited from class java.lang.Object

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

Constructor Detail

ContentPainter

public ContentPainter(ContentView view)

Creates the painter

Parameters:

view - the view, whose content will be painted by this painter, can be null

Method Detail

setView

public void setView(ContentView view)

Sets the view this painter is bound to

Parameters:

view - the view, whose content will be painted by this painter

getSpan

public float getSpan()

Determines the span the glyphs given a start location (for tab expansion).

Returns:

the span in PX

getAscent

public int getAscent()

Fetches the ascent above the baseline.

Returns:

the ascend in PX

getDescent

public int getDescent()

Fetches the descent below the baseline.

Returns:

the descent in PX

getHeight

public int getHeight()

Fetches the height of the font in PX

Returns:

the height in PX

paint

public void paint(java.awt.Graphics g,
                  java.awt.Shape a,
                  int start,
                  int length,
                  int baseline)

Paints the glyphs representing the given range.

Parameters:

g - the graphics to paint to

a - the allocation to paint to

start - the start index within the text of the view

length - the end index within the text of the view

baseline - the offset from the top of the shape to the baseline of the current line

modelToView

public java.awt.Shape modelToView(int pos,
                                  javax.swing.text.Position.Bias bias,
                                  java.awt.Shape a)
                           throws javax.swing.text.BadLocationException

Returns the display shape for a model position

Parameters:

pos - the model position

bias - forward or backward search bias

a - the shape of the parent view

Returns:

the modified shape to represent the selected model position

Throws:

javax.swing.text.BadLocationException - thrown on location errors

viewToModel

public int viewToModel(float x,
                       float y,
                       java.awt.Shape a,
                       javax.swing.text.Position.Bias[] biasReturn)

Provides a mapping from the view coordinate space to the logical coordinate space of the model.

Parameters:

x - the X coordinate

y - the Y coordinate

a - the allocated region to render into

biasReturn - always returns Position.Bias.Forward as the zero-th element of this array

Returns:

the location within the model that best represents the given point in the view

sync

public void sync()

This method has to be called whenever there are changes to the render environment of the painted view. Otherwise the text positions can become inaccurate

getCharOffsets

public float[] getCharOffsets()

Returns the char offsets buffer of this painter. If the buffer is not yet set, this calls will force a fill of this buffer.

Returns:

the char offsets buffer of this painter, may be null

setCharOffsets

public void setCharOffsets(float[] charOffsets)

Sets the char offset buffer of this painter

Parameters:

charOffsets - the char offset buffer of this painter

isCharOffsetsSet

public boolean isCharOffsetsSet()

If this returns true, the char offsets were set.

Returns:

if true, the char offsets were set.

copy

public ContentPainter copy(ContentView target)

Returns a copy of this painter

Parameters:

target - the view to bind to

Returns:

the copy of this painter

setReversed

public void setReversed()

Marks this painter als RTL. This will invert the caret positions

isReversed

public boolean isReversed()

Returns true if this painter paints an RTL content

Returns:

true if this painter paints an RTL content

reset

public void reset()

Causes this painter to recalculate on the next run;