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| public class JText extends JComponent {
/**
*
*/
private static final long serialVersionUID = 1L;
public enum VerticalAlignmentType {
BASELINE,
FONTHEIGHT,
TEXTHEIGHT
}
private String text;
private int halign;
private int valign;
private boolean borderBox;
private VerticalAlignmentType vcentermode;
public JText() {
this("");
}
public JText(String text) {
this(text, SwingConstants.CENTER, SwingConstants.CENTER);
}
public JText(String text, int halign, int valign) {
this.text=text==null?"":text;
this.halign = halign;
this.valign = valign;
this.borderBox = false;
this.vcentermode = VerticalAlignmentType.FONTHEIGHT;
setOpaque(false);
setPreferredSize(null);
}
public void setText(String text) {
text = text==null?"":text;
String oldValue = this.text;
this.text = text;
if ( !Objects.equals(oldValue, text) ) {
firePropertyChange("TEXT", oldValue, text);
repaint();
}
}
public void setBorderBox(boolean borderBox) {
boolean oldValue = this.borderBox;
this.borderBox = borderBox;
if ( oldValue!=borderBox ) {
firePropertyChange("BORDERBOX", oldValue, borderBox);
repaint();
}
}
public boolean isBorderBox() {
return borderBox;
}
public void setTextVerticalCenterMode(VerticalAlignmentType vcentermode) {
VerticalAlignmentType oldValue = this.vcentermode;
this.vcentermode = vcentermode==null?VerticalAlignmentType.FONTHEIGHT:vcentermode;
if ( oldValue!=vcentermode ) {
firePropertyChange("VERTICAL_CENTER_MODE", oldValue, vcentermode);
repaint();
}
}
public VerticalAlignmentType getTextVerticalCenterMode() {
return vcentermode;
}
@Override
public Dimension getPreferredSize() {
if ( isPreferredSizeSet() ) {
return super.getPreferredSize();
}
else {
return computePrefSize();
}
}
private Dimension computePrefSize() {
Font font = getFont();
FontMetrics fontMetrics = getFontMetrics(font);
return new Dimension(fontMetrics.stringWidth(text),fontMetrics.getHeight());
}
@Override
public void paint(Graphics g) {
super.paint(g);
if ( isOpaque() && getBackground()!=null ) {
g.setColor(getBackground());
g.fillRect(0, 0, getWidth(), getHeight());
}
paintBorder(g);
paintComponent(g);
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
g.setColor(getForeground());
Insets insets = getInsets();
Rectangle2D bounds;
if ( borderBox ) {
bounds = new Rectangle2D.Double(insets.left, insets.top,
getWidth()-insets.left-insets.right,
getHeight()-insets.top-insets.bottom);
}
else {
bounds = new Rectangle2D.Double(0, 0,
getWidth(),
getHeight());
}
Graphics2D g2d = (Graphics2D)g;
FontMetrics fontMetrics = g.getFontMetrics();
Rectangle2D textBounds = fontMetrics.getStringBounds(text, g2d);
double textWidth = textBounds.getWidth();
double x,y;
switch (halign) {
case SwingConstants.LEFT:
x = bounds.getX();
break;
case SwingConstants.RIGHT:
x = bounds.getX() + bounds.getWidth() - textWidth;
break;
case SwingConstants.CENTER:
default:
x = bounds.getX()
+ (bounds.getWidth() - textWidth) / 2;
break;
}
switch (valign) {
case SwingConstants.TOP:
y = bounds.getY() + fontMetrics.getAscent() - fontMetrics.getDescent();
break;
case SwingConstants.BOTTOM:
y = bounds.getY()
+ bounds.getHeight() - fontMetrics.getDescent() ;
break;
case SwingConstants.CENTER:
default:
double height;
switch(vcentermode) {
case BASELINE:
height= fontMetrics.getAscent() + fontMetrics.getDescent();
break;
case TEXTHEIGHT:
height=textBounds.getHeight();
break;
case FONTHEIGHT:
default:
height=fontMetrics.getHeight();
break;
}
y = bounds.getY()
+ bounds.getHeight()/ 2 - height / 2 + fontMetrics.getAscent() ;
break;
}
g2d.drawString(text, (int)x, (int)y);
}
} |
