allow multi line text

distribution/ReleaseNotes.txt

@@ -5,11 +5,11 @@ planned as v0.13
 - If an error occurs, the name of the affected circuit file is shown.
 - An input can have "high z" value as its default value.
   CAUTION: All default values are lost! If you have built a circuit that contains
-  test cases that depend on a non-null default value, this tests will fail. To
-  resolve this issue, reset the default value.
+           test cases that depend on a non-null default value, this tests will fail. To
+           resolve this issue, reset the default value.
 - added an enable input to the T flip-flop
   CAUTION: By default this input is activated now. In circuits which used the T flip-flop
-  in the past, the new input needs to be disabled.
+           in the past, the new input needs to be disabled.
 - A warning message shows up if a circuit with unnamed inputs/outputs is analysed.
 - A warning message shows up if a circuit with missing pin numbers is exported to a
   hardware-related file.
@@ -17,6 +17,9 @@ planned as v0.13
 - Comments are allowed in hex files.
 - Added zooming to measurement graphs.
 - Test results can be displayed as measurement graphs.
+- The Text component is able to show multiple lines.
+  CAUTION: If you modify the text in an text component created in the past, you have to
+           reenter the text.
 
 v0.12.1, released on 05. Jun 2016
 - added a fuse to simulate a PROM or PAL.

src/main/java/de/neemann/digital/draw/shapes/TextShape.java

@@ -31,6 +31,10 @@ public class TextShape implements Shape {
      */
     public TextShape(ElementAttributes attr, PinDescriptions inputs, PinDescriptions outputs) {
         String text = attr.get(Keys.DESCRIPTION);
+
+        if (text.length() == 0)  // ToDo: used to show the text from old files.
+            text = attr.getLabel();
+
         if (text.length() == 0)
             text = Lang.get("elem_Text");
         this.text = text;