Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.diagram / src / org / simantics / diagram / elements / TextElementHandler.java

diff --git a/bundles/org.simantics.diagram/src/org/simantics/diagram/elements/TextElementHandler.java b/bundles/org.simantics.diagram/src/org/simantics/diagram/elements/TextElementHandler.java
new file mode 100644 (file)
index 0000000..2e9f1bf
--- /dev/null
+++ b/bundles/org.simantics.diagram/src/org/simantics/diagram/elements/TextElementHandler.java
@@ -0,0 +1,108 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.diagram.elements;\r
+\r
+import java.awt.Font;\r
+import java.awt.font.FontRenderContext;\r
+import java.awt.font.TextLayout;\r
+import java.awt.geom.AffineTransform;\r
+import java.awt.geom.Rectangle2D;\r
+\r
+import org.simantics.g2d.element.ElementHints;\r
+import org.simantics.g2d.element.ElementUtils;\r
+import org.simantics.g2d.element.IElement;\r
+import org.simantics.g2d.element.handler.InternalSize;\r
+import org.simantics.g2d.utils.Alignment;\r
+\r
+/**\r
+ * ElementHandler for text elements\r
+ * In-line editing supported.\r
+ * \r
+ * @author Marko Luukkainen <marko.luukkainen@vtt.fi>\r
+ */\r
+public class TextElementHandler extends TextElementNoBounds implements InternalSize {\r
+\r
+    private static final long serialVersionUID = 2560598115620905271L;\r
+\r
+    public static final TextElementHandler INSTANCE         = new TextElementHandler();\r
+\r
+    public TextElementHandler() {\r
+        super();\r
+    }\r
+\r
+    public TextElementHandler(double originX, double originY, Alignment horizontalAlignment) {\r
+        super(originX, originY, horizontalAlignment);\r
+    }\r
+\r
+    public TextElementHandler(double originX, double originY, Alignment horizontalAlignment, double borderWidth) {\r
+        super(originX, originY, horizontalAlignment, borderWidth);\r
+    }\r
+\r
+    public TextElementHandler(double originX, double originY, Alignment horizontalAlignment, double borderWidth,\r
+            double paddingX, double paddingY, boolean editable) {\r
+        super(originX, originY, horizontalAlignment, borderWidth, paddingX, paddingY, editable);\r
+    }\r
+    \r
+\r
+    @Override\r
+    public Rectangle2D getBounds(IElement e, Rectangle2D size) {\r
+        return calculateBounds(e, size, horizontalAlignment, SCALE, paddingX, paddingY);\r
+    }\r
+    \r
+    public static Rectangle2D calculateBounds(\r
+            IElement e,\r
+            Rectangle2D size, \r
+            Alignment horizontalAlignment, \r
+            double scale,\r
+            double paddingX,\r
+            double paddingY) {\r
+        \r
+        TextNode node = (TextNode) e.getHint(SG_NODE);\r
+        Rectangle2D b = e.getHint(ElementHints.KEY_BOUNDS);\r
+\r
+        if (size == null)\r
+            size = new Rectangle2D.Double();\r
+        if (node != null)\r
+            size.setRect(node.getBoundsInLocal());\r
+        else if(b != null && ElementUtils.getHintOrDefault(e, ElementHints.KEY_RESIZABLE, false))\r
+            size.setRect(b);\r
+        else {\r
+            String text = e.getHint(ElementHints.KEY_TEXT);\r
+            Font font = e.getHint(ElementHints.KEY_FONT);\r
+            if(text == null || font == null)\r
+                size.setFrame(0, 0, 0, 0);\r
+            else {\r
+                FontRenderContext FRC = new FontRenderContext(new AffineTransform(), true, true);\r
+                TextLayout tl = new TextLayout(text, font, FRC);\r
+                Rectangle2D bounds = tl.getLogicalHighlightShape(0, text.length()).getBounds2D();   \r
+                size.setFrame(\r
+                        getAlignedXCoordinate(bounds, horizontalAlignment) * scale - paddingX,\r
+                        bounds.getY() * scale -paddingY, \r
+                        bounds.getWidth()* scale + paddingX + paddingX, \r
+                        bounds.getHeight()* scale + paddingY + paddingY);\r
+            }\r
+        }\r
+        return size;\r
+        \r
+    }\r
+    \r
+    \r
+    public static double getAlignedXCoordinate(Rectangle2D bounds, Alignment horizontalAlignment) {\r
+        if(horizontalAlignment == Alignment.CENTER) {\r
+            return bounds.getX() - bounds.getWidth() / 2;\r
+        } else if(horizontalAlignment == Alignment.TRAILING) {\r
+            return - bounds.getWidth();\r
+        }\r
+        return bounds.getX();\r
+    }\r
+\r
+}
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