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/*
* Copyright (c) 2007 through 2024 David Berkman
*
* This file is part of the SmallMind Code Project.
*
* The SmallMind Code Project is free software, you can redistribute
* it and/or modify it under either, at your discretion...
*
* 1) The terms of GNU Affero General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* ...or...
*
* 2) The terms of the Apache License, Version 2.0.
*
* The SmallMind Code Project 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
* General Public License or Apache License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* and the Apache License along with the SmallMind Code Project. If not, see
* or .
*
* Additional permission under the GNU Affero GPL version 3 section 7
* ------------------------------------------------------------------
* If you modify this Program, or any covered work, by linking or
* combining it with other code, such other code is not for that reason
* alone subject to any of the requirements of the GNU Affero GPL
* version 3.
*/
package org.smallmind.swing.icon;
import java.awt.Component;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import javax.swing.Icon;
public class VerticalTextIcon implements Icon {
private static final String sDrawsInTopRight = "\u3041\u3043\u3045\u3047\u3049\u3063\u3083\u3085\u3087\u308E" + // hiragana
"\u30A1\u30A3\u30A5\u30A7\u30A9\u30C3\u30E3\u30E5\u30E7\u30EE\u30F5\u30F6"; // katakana
private static final String sDrawsInFarTopRight = "\u3001\u3002"; // comma, full stop
private static final double NINETY_DEGREES = Math.toRadians(90.0);
private static final int POSITION_NORMAL = 0;
private static final int POSITION_TOP_RIGHT = 1;
private static final int POSITION_FAR_TOP_RIGHT = 2;
private static final int kBufferSpace = 5;
public static final int ROTATE_DEFAULT = 0x00;
public static final int ROTATE_NONE = 0x01;
public static final int ROTATE_LEFT = 0x02;
public static final int ROTATE_RIGHT = 0x04;
private final FontMetrics fontMetrics;
private final int rotation;
private String text;
private String[] fCharStrings; // for efficiency, break the text into one-char strings to be passed to drawString
private int[] fCharWidths; // Roman characters should be centered when not rotated (Japanese fonts are monospaced)
private int[] fPosition; // Japanese half-height characters need to be shifted when drawn vertically
private int fWidth, fHeight, fCharHeight, fDescent;
public VerticalTextIcon (FontMetrics fontMetrics, String text, int rotation) {
this.fontMetrics = fontMetrics;
this.text = text;
this.rotation = rotation;
calcDimensions();
}
public void setLabel (String text) {
this.text = text;
calcDimensions();
}
public int getIconWidth () {
return fWidth;
}
public int getIconHeight () {
return fHeight;
}
void calcDimensions () {
fCharHeight = fontMetrics.getAscent() + fontMetrics.getDescent();
fDescent = fontMetrics.getDescent();
if (rotation == ROTATE_NONE) {
int len = text.length();
char[] data = new char[len];
text.getChars(0, len, data, 0);
// if not rotated, width is that of the widest char in the string
fWidth = 0;
// we need an array of one-char strings for drawString
fCharStrings = new String[len];
fCharWidths = new int[len];
fPosition = new int[len];
char ch;
for (int i = 0; i < len; i++) {
ch = data[i];
fCharWidths[i] = fontMetrics.charWidth(ch);
if (fCharWidths[i] > fWidth) {
fWidth = fCharWidths[i];
}
fCharStrings[i] = new String(data, i, 1);
// small kana and punctuation
if (sDrawsInTopRight.indexOf(ch) >= 0) // if ch is in sDrawsInTopRight
{
fPosition[i] = POSITION_TOP_RIGHT;
} else if (sDrawsInFarTopRight.indexOf(ch) >= 0) {
fPosition[i] = POSITION_FAR_TOP_RIGHT;
} else {
fPosition[i] = POSITION_NORMAL;
}
}
// and height is the font height * the char count, + one extra leading at the bottom
fHeight = fCharHeight * len + fDescent;
} else {
// if rotated, width is the height of the string
fWidth = fCharHeight;
// and height is the width, plus some buffer space
fHeight = fontMetrics.stringWidth(text) + 2 * kBufferSpace;
}
}
public void paintIcon (Component c, Graphics g, int x, int y) {
g.setColor(c.getForeground());
g.setFont(c.getFont());
((Graphics2D)g).setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
if (rotation == ROTATE_NONE) {
int yPos = y + fCharHeight;
for (int i = 0; i < fCharStrings.length; i++) {
// Special rules for Japanese - "half-height" characters (like ya, yu, yo in combinations)
// should draw in the top-right quadrant when drawn vertically
// - they draw in the bottom-left normally
int tweak;
switch (fPosition[i]) {
case POSITION_NORMAL:
// Roman fonts should be centered. Japanese fonts are always monospaced.
g.drawString(fCharStrings[i], x + ((fWidth - fCharWidths[i]) / 2), yPos);
break;
case POSITION_TOP_RIGHT:
tweak = fCharHeight / 3; // Should be 2, but they aren't actually half-height
g.drawString(fCharStrings[i], x + (tweak / 2), yPos - tweak);
break;
case POSITION_FAR_TOP_RIGHT:
tweak = fCharHeight - fCharHeight / 3;
g.drawString(fCharStrings[i], x + (tweak / 2), yPos - tweak);
break;
}
yPos += fCharHeight;
}
} else if (rotation == ROTATE_LEFT) {
g.translate(x + fWidth, y + fHeight);
((Graphics2D)g).rotate(-NINETY_DEGREES);
g.drawString(text, kBufferSpace, -fDescent);
((Graphics2D)g).rotate(NINETY_DEGREES);
g.translate(-(x + fWidth), -(y + fHeight));
} else if (rotation == ROTATE_RIGHT) {
g.translate(x, y);
((Graphics2D)g).rotate(NINETY_DEGREES);
g.drawString(text, kBufferSpace, -fDescent);
((Graphics2D)g).rotate(-NINETY_DEGREES);
g.translate(-x, -y);
}
}
}
