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jtstand-common is a library derived from jcommon, used by jtstand-chart, which is derived from jfreechart
/*
* Copyright (c) 2009 Albert Kurucz.
*
* This file, TextLine.java is part of JTStand.
*
* JTStand is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* JTStand is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with GTStand. If not, see null not permitted).
*/
public TextLine(final String text) {
this(text, TextFragment.DEFAULT_FONT);
}
/**
* Creates a new text line.
*
* @param text the text (null not permitted).
* @param font the text font (null not permitted).
*/
public TextLine(final String text, final Font font) {
this.fragments = new java.util.ArrayList();
final TextFragment fragment = new TextFragment(text, font);
this.fragments.add(fragment);
}
/**
* Creates a new text line.
*
* @param text the text (null not permitted).
* @param font the text font (null not permitted).
* @param paint the text color (null not permitted).
*/
public TextLine(final String text, final Font font, final Paint paint) {
if (text == null) {
throw new IllegalArgumentException("Null 'text' argument.");
}
if (font == null) {
throw new IllegalArgumentException("Null 'font' argument.");
}
if (paint == null) {
throw new IllegalArgumentException("Null 'paint' argument.");
}
this.fragments = new java.util.ArrayList();
final TextFragment fragment = new TextFragment(text, font, paint);
this.fragments.add(fragment);
}
/**
* Adds a text fragment to the text line.
*
* @param fragment the text fragment (null not permitted).
*/
public void addFragment(final TextFragment fragment) {
this.fragments.add(fragment);
}
/**
* Removes a fragment from the line.
*
* @param fragment the fragment to remove.
*/
public void removeFragment(final TextFragment fragment) {
this.fragments.remove(fragment);
}
/**
* Draws the text line.
*
* @param g2 the graphics device.
* @param anchorX the x-coordinate for the anchor point.
* @param anchorY the y-coordinate for the anchor point.
* @param anchor the point on the text line that is aligned to the anchor
* point.
* @param rotateX the x-coordinate for the rotation point.
* @param rotateY the y-coordinate for the rotation point.
* @param angle the rotation angle (in radians).
*/
public void draw(final Graphics2D g2,
final float anchorX, final float anchorY,
final TextAnchor anchor,
final float rotateX, final float rotateY,
final double angle) {
float x = anchorX;
final float yOffset = calculateBaselineOffset(g2, anchor);
final Iterator iterator = this.fragments.iterator();
while (iterator.hasNext()) {
final TextFragment fragment = (TextFragment) iterator.next();
final Size2D d = fragment.calculateDimensions(g2);
fragment.draw(
g2, x, anchorY + yOffset, TextAnchor.BASELINE_LEFT,
rotateX, rotateY, angle
);
x = x + (float) d.getWidth();
}
}
/**
* Calculates the width and height of the text line.
*
* @param g2 the graphics device.
*
* @return The width and height.
*/
public Size2D calculateDimensions(final Graphics2D g2) {
double width = 0.0;
double height = 0.0;
final Iterator iterator = this.fragments.iterator();
while (iterator.hasNext()) {
final TextFragment fragment = (TextFragment) iterator.next();
final Size2D dimension = fragment.calculateDimensions(g2);
width = width + dimension.getWidth();
height = Math.max(height, dimension.getHeight());
}
return new Size2D(width, height);
}
/**
* Returns the first text fragment in the line.
*
* @return The first text fragment in the line.
*/
public TextFragment getFirstTextFragment() {
TextFragment result = null;
if (this.fragments.size() > 0) {
result = (TextFragment) this.fragments.get(0);
}
return result;
}
/**
* Returns the last text fragment in the line.
*
* @return The last text fragment in the line.
*/
public TextFragment getLastTextFragment() {
TextFragment result = null;
if (this.fragments.size() > 0) {
result = (TextFragment) this.fragments.get(this.fragments.size()
- 1);
}
return result;
}
/**
* Calculate the offsets required to translate from the specified anchor
* position to the left baseline position.
*
* @param g2 the graphics device.
* @param anchor the anchor position.
*
* @return The offsets.
*/
private float calculateBaselineOffset(final Graphics2D g2,
final TextAnchor anchor) {
float result = 0.0f;
Iterator iterator = this.fragments.iterator();
while (iterator.hasNext()) {
TextFragment fragment = (TextFragment) iterator.next();
result = Math.max(result,
fragment.calculateBaselineOffset(g2, anchor));
}
return result;
}
/**
* Tests this object for equality with an arbitrary object.
*
* @param obj the object to test against (null permitted).
*
* @return A boolean.
*/
public boolean equals(final Object obj) {
if (obj == null) {
return false;
}
if (obj == this) {
return true;
}
if (obj instanceof TextLine) {
final TextLine line = (TextLine) obj;
return this.fragments.equals(line.fragments);
}
return false;
}
/**
* Returns a hash code for this object.
*
* @return A hash code.
*/
public int hashCode() {
return (this.fragments != null ? this.fragments.hashCode() : 0);
}
}
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