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
  29         private Color fErrorMsgAreaBackground;
  30
  31         /**
  32          * Creates a new message line as a child of the given parent.
  33          */
  34         public MessageLine(Composite parent) {
  35                 this(parent, SWT.LEFT);
  36         }
  37
  38         /**
  39          * Creates a new message line as a child of the parent and with the given
  40          * SWT stylebits.
  41          */
  42         public MessageLine(Composite parent, int style) {
  43                 super(parent, style);
  44                 fNormalMsgAreaBackground = getBackground();
  45                 fErrorMsgAreaBackground = null;
  46         }
  47
  48         private Image findImage(IStatus status) {
  49                 if (status.isOK()) {
  50                         return null;
  51                 } else if (status.matches(IStatus.ERROR)) {
  52                         return PlatformUI.getWorkbench().getSharedImages().getImage(
  53                                         ISharedImages.IMG_OBJS_ERROR_TSK);
  54                 } else if (status.matches(IStatus.WARNING)) {
  55                         return PlatformUI.getWorkbench().getSharedImages().getImage(
  56                                         ISharedImages.IMG_OBJS_WARN_TSK);
  57                 } else if (status.matches(IStatus.INFO)) {
  58                         return PlatformUI.getWorkbench().getSharedImages().getImage(
  59                                         ISharedImages.IMG_OBJS_INFO_TSK);
  60                 }
  61                 return null;
  62         }
  63
  64         /**
  65          * Sets the message and image to the given status. <code>null</code> is a
  66          * valid argument and will set the empty text and no image
  67          */
  68         public void setErrorStatus(IStatus status) {
  69                 if (status != null) {
  70                         String message = status.getMessage();
  71                         if (message != null && message.length() > 0) {
  72                                 setText(message);
  73                                 setImage(findImage(status));
  74                                 if (fErrorMsgAreaBackground == null) {
  75                                         fErrorMsgAreaBackground = new Color(getDisplay(),
  76                                                         ERROR_BACKGROUND_RGB);
  77                                 }
  78                                 setBackground(fErrorMsgAreaBackground);
  79                                 return;
  80                         }
  81                 }
  82                 setText(""); //$NON-NLS-1$
  83                 setImage(null);
  84                 setBackground(fNormalMsgAreaBackground);
  85         }
  86
  87         /*
  88          * @see Widget#dispose()
  89          */
  90         public void dispose() {
  91                 if (fErrorMsgAreaBackground != null) {
  92                         fErrorMsgAreaBackground.dispose();
  93                         fErrorMsgAreaBackground = null;
  94                 }
  95                 super.dispose();
  96         }
  97 }