Source for gnu.java.awt.peer.gtk.GtkLabelPeer

   1: /* GtkLabelPeer.java -- Implements LabelPeer with GTK
   2:    Copyright (C) 1998, 1999, 2005, 2006  Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: 
  39: package gnu.java.awt.peer.gtk;
  40: 
  41: import java.awt.Label;
  42: import java.awt.peer.LabelPeer;
  43: 
  44: // A composite widget.  GtkLabels have transparent backgrounds.  An
  45: // AWT Label is opaque.  To compensate, a GtkLabelPeer is a GtkLabel
  46: // packed in a GtkEventBox.
  47: public class GtkLabelPeer extends GtkComponentPeer
  48:     implements LabelPeer
  49: {
  50:   native void create (String text, float alignment);
  51: 
  52:   /**
  53:    * Overridden to set the Font of the label inside the gtk_event_box.
  54:    */
  55:   protected native void gtkWidgetModifyFont(String name, int style, int size);
  56: 
  57:   native void nativeSetAlignment (float alignment);
  58: 
  59:   public native void setNativeText(String text);
  60:   native void setNativeBounds (int x, int y, int width, int height);
  61: 
  62:   // Because this is a composite widget, we need to retrieve the
  63:   // GtkLabel's preferred dimensions, not the enclosing GtkEventBox's.
  64:   native void gtkWidgetGetPreferredDimensions (int[] dim);
  65: 
  66:   void create ()
  67:   {
  68:     Label label = (Label) awtComponent;
  69:     create (label.getText (), getGtkAlignment (label.getAlignment ()));
  70:   }
  71: 
  72:   public void setText(String text)
  73:   {
  74:     if (text != null)
  75:       setNativeText(text);
  76:   }
  77: 
  78:   public GtkLabelPeer (Label l)
  79:   {
  80:     super (l);
  81:   }
  82: 
  83:   public void setAlignment (int alignment)
  84:   {
  85:     nativeSetAlignment (getGtkAlignment (alignment));
  86:   }
  87: 
  88:   float getGtkAlignment (int alignment)
  89:   {
  90:     switch (alignment)
  91:       {
  92:       case Label.LEFT:
  93:         return 0.0f;
  94:       case Label.CENTER:
  95:         return 0.5f;
  96:       case Label.RIGHT:
  97:         return 1.0f;
  98:       }
  99: 
 100:     return 0.0f;
 101:   }
 102: }