Re: Compilation in javax/swing/plaf/basic/BasicGraphicsUtils.java

[Sascha Brawer]

Stephen Crawley <address@hidden> wrote on Thu, 19 Jun 2003 02:36:42
+1000:

>Found 1 semantic error compiling "../javax/swing/plaf/basic/
>BasicGraphicsUtils.java":
>
>   483.     lineMetrics = font.getLineMetrics(text, frc);
>                          <---------------------------->
>*** Error: No method named "getLineMetrics" was found in type "java/awt/
Font".

I am sorry for this. Given the unfortunately still very desolate state of
our graphics support, I could not test my Swing code if I compiled it
with the rest of Classpath. Therefore, if some other package does not
conform to the API spec, it can happen that I do not get any compilation
errors.

In any case, here's a patch for java/awt/Font.java which should make
things compile again (already in CVS).

-- Sascha

Sascha Brawer, address@hidden, http://www.dandelis.ch/people/brawer/ 



Index: java/awt/Font.java
===================================================================
RCS file: /cvsroot/classpath//classpath/java/awt/Font.java,v
retrieving revision 1.9
diff -u -r1.9 Font.java
--- java/awt/Font.java  22 May 2003 07:14:25 -0000      1.9
+++ java/awt/Font.java  19 Jun 2003 00:25:15 -0000
@@ -39,6 +39,8 @@
 package java.awt;
 
 import java.awt.peer.FontPeer;
+import java.awt.font.FontRenderContext;
+import java.awt.font.LineMetrics;
 import java.io.Serializable;
 import java.util.StringTokenizer;
 
@@ -484,5 +486,28 @@
          ",size=" + size + ")");
 }
 
+
+  /**
+   * Determines the line metrics for a run of text.
+   *
+   * @param str the text run to be measured.
+   *
+   * @param frc the font rendering parameters that are used for the
+   *        measurement. The exact placement and size of text slightly
+   *        depends on device-specific characteristics, for instance
+   *        the device resolution or anti-aliasing.  For this reason,
+   *        the returned measurement will only be accurate if the
+   *        passed <code>FontRenderContext</code> correctly reflects
+   *        the relevant parameters. Hence, <code>frc</code> should be
+   *        obtained from the same <code>Graphics2D</code> that will
+   *        be used for drawing, and any rendering hints should be set
+   *        to the desired values before obtaining <code>frc</code>.
+   *
+   * @see java.awt.Graphics2D#getFontRenderContext()
+   */
+  public LineMetrics getLineMetrics(String str, FontRenderContext frc)
+  {
+    throw new UnsupportedOperationException(); // FIXME
+  }
 } // class Font