net.sourceforge.phpeclipse.externaltools/src/net/sourceforge/phpdt/externaltools/internal/ui/MessageLine.java

   1 package net.sourceforge.phpdt.externaltools.internal.ui;
   2
   3 /**********************************************************************
   4 Copyright (c) 2000, 2002 IBM Corp.  All rights reserved.
   5 This file is made available under the terms of the Common Public License v1.0
   6 which accompanies this distribution, and is available at
   7 http://www.eclipse.org/legal/cpl-v10.html
   8 **********************************************************************/
   9
  10 import org.eclipse.core.runtime.IStatus;
  11 import org.eclipse.swt.SWT;
  12 import org.eclipse.swt.custom.CLabel;
  13 import org.eclipse.swt.graphics.Color;
  14 import org.eclipse.swt.graphics.Image;
  15 import org.eclipse.swt.graphics.RGB;
  16 import org.eclipse.swt.widgets.Composite;
  17 import org.eclipse.ui.ISharedImages;
  18 import org.eclipse.ui.PlatformUI;
  19
  20 /**
  21  * A message line displaying a status.
  22  */
  23 public class MessageLine extends CLabel {
  24
  25         private static final RGB ERROR_BACKGROUND_RGB = new RGB(230, 226, 221);
  26
  27         private Color fNormalMsgAreaBackground;
  28         private Color fErrorMsgAreaBackground;
  29
  30         /**
  31          * Creates a new message line as a child of the given parent.
  32          */
  33         public MessageLine(Composite parent) {
  34                 this(parent, SWT.LEFT);
  35         }
  36
  37         /**
  38          * Creates a new message line as a child of the parent and with the given SWT stylebits.
  39          */
  40         public MessageLine(Composite parent, int style) {
  41                 super(parent, style);
  42                 fNormalMsgAreaBackground= getBackground();
  43                 fErrorMsgAreaBackground= null;
  44         }
  45
  46
  47         private Image findImage(IStatus status) {
  48                 if (status.isOK()) {
  49                         return null;
  50                 } else if (status.matches(IStatus.ERROR)) {
  51                         return PlatformUI.getWorkbench().getSharedImages().getImage(ISharedImages.IMG_OBJS_ERROR_TSK);
  52                 } else if (status.matches(IStatus.WARNING)) {
  53                         return PlatformUI.getWorkbench().getSharedImages().getImage(ISharedImages.IMG_OBJS_WARN_TSK);
  54                 } else if (status.matches(IStatus.INFO)) {
  55                         return PlatformUI.getWorkbench().getSharedImages().getImage(ISharedImages.IMG_OBJS_INFO_TSK);
  56                 }
  57                 return null;
  58         }
  59
  60         /**
  61          * Sets the message and image to the given status.
  62          * <code>null</code> is a valid argument and will set the empty text and no image
  63          */
  64         public void setErrorStatus(IStatus status) {
  65                 if (status != null) {
  66                         String message= status.getMessage();
  67                         if (message != null && message.length() > 0) {
  68                                 setText(message);
  69                                 setImage(findImage(status));
  70                                 if (fErrorMsgAreaBackground == null) {
  71                                         fErrorMsgAreaBackground= new Color(getDisplay(), ERROR_BACKGROUND_RGB);
  72                                 }
  73                                 setBackground(fErrorMsgAreaBackground);
  74                                 return;
  75                         }
  76                 }
  77                 setText(""); //$NON-NLS-1$
  78                 setImage(null);
  79                 setBackground(fNormalMsgAreaBackground);
  80         }
  81
  82         /*
  83          * @see Widget#dispose()
  84          */
  85         public void dispose() {
  86                 if (fErrorMsgAreaBackground != null) {
  87                         fErrorMsgAreaBackground.dispose();
  88                         fErrorMsgAreaBackground= null;
  89                 }
  90                 super.dispose();
  91         }
  92 }