dorkbox/Utilities
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Moved swing font util method into utils class

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nathan 2017-02-23 01:31:33 +01:00
parent e9585ce5b7
commit c03a8f0b71
1 changed files with 37 additions and 0 deletions
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37
src/dorkbox/util/SwingUtil.java
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@ -22,6 +22,8 @@ import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.FontFormatException;
import java.awt.FontMetrics;
import java.awt.Graphics2D;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Image;
@ -34,6 +36,7 @@ import java.awt.event.HierarchyEvent;
import java.awt.event.HierarchyListener;
import java.awt.event.KeyEvent;
import java.awt.event.WindowListener;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.InputStream;
@ -239,6 +242,40 @@ class SwingUtil {
}
}
/**
* Gets the correct font (in GENERAL) for a specified pixel height.
* @param font the font we are checking
* @param height the height in pixels we want to get as close as possible to
*
* @return the font (derived from the specified font) that is as close as possible to the requested height
*/
private static
Font getFontForSpecificHeight(final Font font, final int height) {
int size = font.getSize();
Boolean lastAction = null;
BufferedImage image = new BufferedImage(1, 1, BufferedImage.TYPE_INT_RGB);
Graphics2D g = image.createGraphics();
while (true) {
Font fontCheck = new Font(font.getName(), Font.PLAIN, size);
FontMetrics metrics = g.getFontMetrics(fontCheck);
Rectangle2D rect = metrics.getStringBounds("Tj|", g); // Tj| are letters that are at the top/bottom of the fontset (usually)
int testHeight = (int) rect.getHeight();
if (testHeight < height && lastAction != Boolean.FALSE) {
size++;
lastAction = Boolean.TRUE;
} else if (testHeight > height && lastAction != Boolean.TRUE) {
size--;
lastAction = Boolean.FALSE;
} else {
// either we are the exact size, or we are ONE font size to big/small (depending on what our initial guess was)
return fontCheck;
}
}
}
/**
* Centers a component according to the window location.
*