JAL-1432 updated copyright notices

[jalview.git] / src / jalview / gui / FontChooser.java

diff --git a/src/jalview/gui/FontChooser.java b/src/jalview/gui/FontChooser.java
index 310361a..1149591 100755 (executable)
--- a/src/jalview/gui/FontChooser.java
+++ b/src/jalview/gui/FontChooser.java
@@ -1,19 +1,20 @@
 /*
- * Jalview - A Sequence Alignment Editor and Viewer (Version 2.7)
- * Copyright (C) 2011 J Procter, AM Waterhouse, J Engelhardt, LM Lui, G Barton, M Clamp, S Searle
+ * Jalview - A Sequence Alignment Editor and Viewer (Version 2.8.0b1)
+ * Copyright (C) 2014 The Jalview Authors
  * 
  * This file is part of Jalview.
  * 
  * Jalview is free software: you can redistribute it and/or
  * modify it under the terms of the GNU General Public License 
  * as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
- * 
+ *  
  * Jalview 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 for more details.
  * 
  * You should have received a copy of the GNU General Public License along with Jalview.  If not, see <http://www.gnu.org/licenses/>.
+ * The Jalview Authors are detailed in the 'AUTHORS' file.
  */
 package jalview.gui;
 
@@ -179,14 +180,50 @@ public class FontChooser extends GFontChooser
     }
   }
 
+  private Font lastSelected = null;
+
+  private int lastSelStyle = 0;
+
+  private int lastSelSize = 0;
+
+  private boolean lastSelMono = false;
+
   /**
    * DOCUMENT ME!
    */
   void changeFont()
   {
+    if (lastSelected == null)
+    {
+      // initialise with original font
+      lastSelected = oldFont;
+      lastSelSize = oldFont.getSize();
+      lastSelStyle = oldFont.getStyle();
+      FontMetrics fm = getGraphics().getFontMetrics(oldFont);
+      double mw = fm.getStringBounds("M", getGraphics()).getWidth(), iw = fm
+              .getStringBounds("I", getGraphics()).getWidth();
+      lastSelMono = mw == iw;
+    }
+
     Font newFont = new Font(fontName.getSelectedItem().toString(),
             fontStyle.getSelectedIndex(), Integer.parseInt(fontSize
                     .getSelectedItem().toString()));
+    FontMetrics fm = getGraphics().getFontMetrics(newFont);
+    double mw = fm.getStringBounds("M", getGraphics()).getWidth(), iw = fm
+            .getStringBounds("I", getGraphics()).getWidth();
+    if (mw < 1 || iw < 1)
+    {
+      fontName.setSelectedItem(lastSelected.getName());
+      fontStyle.setSelectedIndex(lastSelStyle);
+      fontSize.setSelectedItem("" + lastSelSize);
+      monospaced.setSelected(lastSelMono);
+      JOptionPane
+              .showInternalMessageDialog(
+                      this,
+                      "Font doesn't have letters defined\nso cannot be used\nwith alignment data.",
+                      "Invalid Font", JOptionPane.WARNING_MESSAGE);
+      return;
+    }
     if (tp != null)
     {
       tp.setTreeFont(newFont);
@@ -197,12 +234,9 @@ public class FontChooser extends GFontChooser
       ap.fontChanged();
     }
 
-    FontMetrics fm = getGraphics().getFontMetrics(newFont);
-
-    monospaced.setSelected(fm.getStringBounds("M", getGraphics())
-            .getWidth() == fm.getStringBounds("|", getGraphics())
-            .getWidth());
-
+    monospaced.setSelected(mw == iw);
+    // remember last selected
+    lastSelected = newFont;
   }
 
   /**