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180 lines
2.5 KiB
Java
180 lines
2.5 KiB
Java
Label (CustomLabel)
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import java.awt.*;
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/**
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* This class implments a label control by subclassing Canvas.
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*/
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public class CustomLabel extends
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Canvas {
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private String text; // The text to be displayed.
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private Insets margins; // determines size of margins
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private FontMetrics fm; // metrics for current font
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/**
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* Construct a CustomLabel object that displays the specified text.
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* @param text text to be displayed.
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*/
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public CustomLabel(String text) {
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this.text = text;
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margins = new Insets(4,4,4,4);
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} // setText(String)
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/**
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* Sets the font for this object.
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*/
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public void setFont(Font f) {
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super.setFont(f);
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fm = getFontMetrics(f);
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} // setFont(Font)
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/**
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* Notifies the Component that it has been added to a container
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* and if a peer is required, it should be created.
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* This method should be called by Container.add, and not by user
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* code directly.
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* @see #removeNotify
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*/
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public void addNotify() {
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super.addNotify();
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fm = getFontMetrics(getFont());
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} // addNotify()
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/**
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* Returns the minimum size that this component must be to paint
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* itself properly.
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*/
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public Dimension minimumSize() {
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int width = margins.left + fm.stringWidth(text) + margins.right;
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int height = margins.top + fm.getHeight() + margins.bottom;
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return new Dimension(width, height);
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} // minimumSize()
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/**
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* Returns the preferred size for this component.
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*/
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public Dimension preferredSize() {
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return minimumSize();
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} // preferredSize()
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/**
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* Paint this label.
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*/
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public void paint(Graphics g) {
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super.paint(g);
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g.setFont(getFont());
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g.setColor(getForeground());
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g.drawString(text, margins.left, margins.top+fm.getHeight());
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} // paint(Graphics)
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/**
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* Get the text displayed by this object.
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*/
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public String getText() {
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return text;
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} // getText()
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/**
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* Set the text displayed by this object.
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* @param text text to be displayed.
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*/
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public void setText(String text) {
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this.text = text;
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} // setText(String)
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} // class CustomLabel
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