org.tizen.common/src/org/tizen/common/swt/PictureLabel.java

   1 /*\r
   2 *  Common\r
   3 *\r
   4 * Copyright (c) 2000 - 2011 Samsung Electronics Co., Ltd. All rights reserved.\r
   5 *\r
   6 * Contact: \r
   7 * Kangho Kim <kh5325.kim@samsung.com>\r
   8 * \r
   9 * Licensed under the Apache License, Version 2.0 (the "License");\r
  10 * you may not use this file except in compliance with the License.\r
  11 * You may obtain a copy of the License at\r
  12 *\r
  13 * http://www.apache.org/licenses/LICENSE-2.0\r
  14 *\r
  15 * Unless required by applicable law or agreed to in writing, software\r
  16 * distributed under the License is distributed on an "AS IS" BASIS,\r
  17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
  18 * See the License for the specific language governing permissions and\r
  19 * limitations under the License.\r
  20 *\r
  21 * Contributors:\r
  22 * - S-Core Co., Ltd\r
  23 *\r
  24 */\r
  25 \r
  26 package org.tizen.common.swt;\r
  27 \r
  28 import java.util.List;\r
  29 import java.util.ArrayList;\r
  30 \r
  31 import org.eclipse.swt.*;\r
  32 import org.eclipse.swt.graphics.*;\r
  33 import org.eclipse.swt.widgets.*;\r
  34 import org.eclipse.swt.events.*;\r
  35 \r
  36 /**\r
  37  * Reference to http://www.eclipse.org/articles/Article-Writing%20Your%20Own%20Widget/Writing%20Your%20Own%20Widget.htm\r
  38  * \r
  39  * @author Jihoon Song {@literal <jihoon80.song@samsung.com>} (S-Core)\r
  40  */\r
  41 public class PictureLabel extends Canvas {\r
  42         private Image image;\r
  43         private String text;\r
  44         private boolean selected;\r
  45         private List<ImageClickedListener> imageClickedListeners = new ArrayList<ImageClickedListener>();\r
  46 \r
  47         public PictureLabel(Composite parent, int style) {\r
  48                 super(parent, style);\r
  49 \r
  50                 // default background color\r
  51                 setBackground(getDisplay().getSystemColor(SWT.COLOR_WHITE));\r
  52 \r
  53                 // add listener\r
  54                 addDisposeListener(new DisposeListener() {\r
  55                         public void widgetDisposed(DisposeEvent e) {}\r
  56                 });\r
  57                 addPaintListener(new PaintListener() {\r
  58                         public void paintControl(PaintEvent e) {\r
  59                                 PictureLabel.this.paintControl(e);\r
  60                         }\r
  61                 });\r
  62                 addMouseListener(new MouseAdapter() {\r
  63                         public void mouseDown(MouseEvent event) {\r
  64                                 if (event.button == java.awt.event.MouseEvent.BUTTON1) {\r
  65                                         PictureLabel.this.mouseDown(event);\r
  66                                 }\r
  67                         }\r
  68                 });\r
  69                 addMouseTrackListener(new MouseTrackAdapter() {\r
  70                         public void mouseEnter(MouseEvent event) {\r
  71                                 PictureLabel.this.mouseEnter(event);\r
  72                         }\r
  73                         public void mouseExit(MouseEvent event) {\r
  74                                 PictureLabel.this.mouseExit(event);\r
  75                         }\r
  76                 });\r
  77 \r
  78                 setSelection(false);\r
  79         }\r
  80 \r
  81         public void mouseDown(MouseEvent event) {\r
  82                 ImageClickedEvent e = new ImageClickedEvent(this, event.x, event.y);\r
  83                 setSelection(!selected);\r
  84                 for (ImageClickedListener listener : imageClickedListeners) {\r
  85                         listener.imageClicked(e);\r
  86                 }\r
  87         }\r
  88 \r
  89         protected void mouseEnter(MouseEvent event) {\r
  90                 setBackground(getDisplay().getSystemColor(SWT.COLOR_WIDGET_LIGHT_SHADOW));\r
  91         }\r
  92 \r
  93         protected void mouseExit(MouseEvent event) {\r
  94                 setBackground(getDisplay().getSystemColor(selected ? SWT.COLOR_GRAY : SWT.COLOR_WHITE));\r
  95         }\r
  96 \r
  97         public void setSelection(boolean selected) {\r
  98                 this.selected = selected;\r
  99                 setBackground(getDisplay().getSystemColor(selected ? SWT.COLOR_GRAY : SWT.COLOR_WHITE));\r
 100         }\r
 101 \r
 102         public void addImageClickedListener(ImageClickedListener listener) {\r
 103                 imageClickedListeners.add(listener);\r
 104         }\r
 105 \r
 106         public void removeImageClickedListener(ImageClickedListener listener) {\r
 107                 imageClickedListeners.remove(listener);\r
 108         }\r
 109 \r
 110         void paintControl(PaintEvent e) {\r
 111                 GC gc = e.gc;\r
 112                 int x = 1;\r
 113                 int y = 1;\r
 114                 int clientAreaWidth = getClientArea().width;\r
 115                 int textWidth = gc.stringExtent(text).x;\r
 116                 int imageWidth = image.getBounds().width;\r
 117                 int imageHeght = image.getBounds().height;\r
 118                 int maxWidth = Math.max(Math.max(imageWidth, imageWidth), clientAreaWidth);\r
 119 \r
 120                 if ((image != null) & (text != null)) {\r
 121                         x = 1 + (maxWidth - imageWidth) / 2;\r
 122                         gc.drawImage(image, x, y);\r
 123                         y = y + imageHeght + 5;\r
 124                         x = 1 + (maxWidth - textWidth) / 2;\r
 125                         gc.drawText(text, x, y);\r
 126                 } else if (image != null) {\r
 127                         x = 1 + (maxWidth - imageWidth) / 2;\r
 128                         gc.drawImage(image, x, 1);\r
 129                 } else if (text != null) {\r
 130                         x = 1 + (maxWidth - textWidth) / 2;\r
 131                         gc.drawText(text, x, 1);\r
 132                 }\r
 133                 gc.dispose();\r
 134         }\r
 135 \r
 136         public Image getImage() {\r
 137                 return image;\r
 138         }\r
 139 \r
 140         public void setImage(Image image) {\r
 141                 this.image = image;\r
 142                 redraw();\r
 143         }\r
 144 \r
 145         public String getText() {\r
 146                 return text;\r
 147         }\r
 148 \r
 149         public void setText(String text) {\r
 150                 this.text = text;\r
 151                 redraw();\r
 152         }\r
 153 \r
 154         public Point computeSize(int wHint, int hHint, boolean changed) {\r
 155                 int width = 0;\r
 156                 int height = 0;\r
 157                 if (image != null && text != null) {\r
 158                         GC gc = new GC(this);\r
 159                         int textWidth = gc.stringExtent(text).x;\r
 160                         int textHeight = gc.stringExtent(text).y;\r
 161                         int imageWidth = image.getBounds().width;\r
 162                         int imageHeight = image.getBounds().height;\r
 163                         gc.dispose();\r
 164                         if (imageWidth >= textWidth)\r
 165                                 width = imageWidth + 2;\r
 166                         else\r
 167                                 width = textWidth + 2;\r
 168                         height = textHeight + imageHeight + 7;\r
 169                 } else if (image != null) {\r
 170                         Rectangle bounds = image.getBounds();\r
 171                         width = bounds.width + 2;\r
 172                         height = bounds.height + 2;\r
 173                 } else if (text != null) {\r
 174                         GC gc = new GC(this);\r
 175                         Point extent = gc.stringExtent(text);\r
 176                         gc.dispose();\r
 177                         width = extent.x + 2;\r
 178                         height = extent.y + 2;\r
 179                 }\r
 180                 if (wHint != -1)\r
 181                         width = wHint;\r
 182                 if (hHint != -1)\r
 183                         height = hHint;\r
 184 \r
 185                 return new Point(width + 2, height + 2);\r
 186         }\r
 187 \r
 188         public boolean isSelected() {\r
 189                 return selected;\r
 190         }\r
 191 }\r
 192 \r
 193 class ImageClickedEvent extends java.util.EventObject {\r
 194         public int x, y;\r
 195 \r
 196         public ImageClickedEvent(Object source, int x, int y) {\r
 197                 super(source);\r
 198 \r
 199                 this.x = x;\r
 200                 this.y = y;\r
 201         }\r
 202 }\r
 203 \r
 204 interface ImageClickedListener extends java.util.EventListener {\r
 205         public void imageClicked(ImageClickedEvent event);\r
 206 }\r