Added automatic text flipping option for text readability in TextNode

refs #7112

Change-Id: I6027ff66e3bc60d81385088fcf072e09dff7e6a7

diff --git a/bundles/org.simantics.diagram/src/org/simantics/diagram/elements/TextNode.java b/bundles/org.simantics.diagram/src/org/simantics/diagram/elements/TextNode.java
index 85923bc35763923d5d2015178c867d73b84a98a7..4554decee2c01a41b032be9dab5c77ecec2af2f7 100644 (file)
--- a/bundles/org.simantics.diagram/src/org/simantics/diagram/elements/TextNode.java
+++ b/bundles/org.simantics.diagram/src/org/simantics/diagram/elements/TextNode.java
@@ -34,7 +34,6 @@ import java.awt.font.TextLayout;
 import java.awt.geom.AffineTransform;
 import java.awt.geom.Point2D;
 import java.awt.geom.Rectangle2D;
-import java.io.IOException;
 import java.text.AttributedCharacterIterator;
 import java.text.AttributedString;
 import java.util.ArrayList;
@@ -75,13 +74,7 @@ import org.simantics.ui.dnd.PlaintextTransfer;
 import org.simantics.ui.fonts.Fonts;
 import org.simantics.utils.threads.AWTThread;
 
-import com.lowagie.text.DocumentException;
-import com.lowagie.text.Element;
-import com.lowagie.text.Rectangle;
-import com.lowagie.text.pdf.FontMapper;
-import com.lowagie.text.pdf.PdfFormField;
 import com.lowagie.text.pdf.PdfWriter;
-import com.lowagie.text.pdf.TextField;
 
 import gnu.trove.list.array.TIntArrayList;
 
@@ -99,7 +92,6 @@ import gnu.trove.list.array.TIntArrayList;
  * TODO:
  * o proper support for defining clipping bounds for the text (needed for page templates) (currently through fixedWidth)
  * o fix editing xOffset to work with fixed width and multi-line text
- * o 
  * 
  * @see Line
  * @see TextLayout
@@ -108,6 +100,12 @@ public class TextNode extends G2DNode implements IDynamicSelectionPainterNode, L
 
     private static final long                serialVersionUID           = 654692698101485672L;
 
+    public static enum TextFlipping {
+        Disabled,
+        VerticalTextUpwards,
+        VerticalTextDownwards,
+    }
+
     /**
      * TODO: justify existence for this
      */
@@ -191,6 +189,8 @@ public class TextNode extends G2DNode implements IDynamicSelectionPainterNode, L
     protected transient static final int STATE_X_OFFSET_IS_DIRTY = (1 << 7);
     protected static final int STATE_ALWAYS_ADD_LISTENERS = (1 << 8);
     protected static final int STATE_LISTENERS_ADDED = (1 << 9);
+    protected static final int STATE_AUTOMATIC_TEXT_FLIP_ENABLED = (1 << 10);
+    protected static final int STATE_AUTOMATIC_TEXT_FLIP_VERTICAL_DOWN = (1 << 11);
 
     /**
      * A combination of all the STATE_ constants defined in this class,
@@ -413,6 +413,21 @@ public class TextNode extends G2DNode implements IDynamicSelectionPainterNode, L
         resetCaches();
     }
 
+    public void setAutomaticTextFlipping(TextFlipping type) {
+        switch (type) {
+        case Disabled:
+            clearState(STATE_AUTOMATIC_TEXT_FLIP_ENABLED | STATE_AUTOMATIC_TEXT_FLIP_VERTICAL_DOWN);
+            break;
+        case VerticalTextDownwards:
+            setState(STATE_AUTOMATIC_TEXT_FLIP_ENABLED | STATE_AUTOMATIC_TEXT_FLIP_VERTICAL_DOWN);
+            break;
+        case VerticalTextUpwards:
+            setState(STATE_AUTOMATIC_TEXT_FLIP_ENABLED);
+            clearState(STATE_AUTOMATIC_TEXT_FLIP_VERTICAL_DOWN);
+            break;
+        }
+    }
+
     @SyncField({"paddingX", "paddingY"})
     public void setPadding(double x, double y) {
         this.paddingX = x;
@@ -628,7 +643,8 @@ public class TextNode extends G2DNode implements IDynamicSelectionPainterNode, L
         // Safety for not rendering when the scale of this text is too small.
         // When the scale is too small it will cause internal exceptions while
         // stroking fonts.
-        double currentScale = GeometryUtils.getScale(g.getTransform());
+        AffineTransform curTr = g.getTransform();
+        double currentScale = GeometryUtils.getScale(curTr);
         //System.out.println("currentScale: " + currentScale);
         if (currentScale < 1e-6)
             return;
@@ -652,6 +668,27 @@ public class TextNode extends G2DNode implements IDynamicSelectionPainterNode, L
             r.setRect(x, y, w, h);
         }
 
+        if (hasState(STATE_AUTOMATIC_TEXT_FLIP_ENABLED)) {
+            boolean needsXFlip;
+            boolean needsYFlip;
+            if (curTr.getScaleX() != 0) {
+                needsXFlip = curTr.getScaleX() < 0.0;
+                needsYFlip = curTr.getScaleY() < 0.0;
+            } else {
+                boolean flipAll = !hasState(STATE_AUTOMATIC_TEXT_FLIP_VERTICAL_DOWN);
+                needsXFlip = (curTr.getShearY() < 0.0) ^ flipAll;
+                needsYFlip = (curTr.getShearX() > 0.0) ^ flipAll;
+            }
+            if (needsXFlip || needsYFlip) {
+                double centerX = r.getWidth()*0.5 + r.getX();
+                double centerY = r.getHeight()*0.5 + r.getY();
+
+                g.translate(centerX, centerY);
+                g.scale(needsXFlip ? -1.0 : 1.0, needsYFlip ? -1.0 : 1.0);
+                g.translate(-centerX, -centerY);
+            }
+        }
+
         Rectangle2D textClip = r.getBounds2D();
 
         expandBoundsUnscaled(r);
@@ -674,22 +711,12 @@ public class TextNode extends G2DNode implements IDynamicSelectionPainterNode, L
         // PDF 
         PdfWriter writer = (PdfWriter) g.getRenderingHint(G2DPDFRenderingHints.KEY_PDF_WRITER);
         boolean isRenderingPdf = writer != null;
-        boolean isPdfField = false;
-        String fieldName = null;
-        if (writer != null) {
-               // TODO: replace this hack with proper text field name field
-               fieldName = NodeUtil.getNodeName(this);
-               isPdfField = ( fieldName.equals("approved_by") ||
-                                               fieldName.equals("checked_by") ||
-                                               fieldName.equals("designer name") ||
-                                               fieldName.equals("created_by") );
-        }
+        /// PDF
 
         Color backgroundColor = hasState(STATE_VALID) ? this.backgroundColor : Color.red;
 
         // RENDER
-        if ( !isPdfField ) {
-
+        {
             // Fill background if necessary
             if (backgroundColor != null) {
                 g.setColor(backgroundColor);
@@ -727,10 +754,7 @@ public class TextNode extends G2DNode implements IDynamicSelectionPainterNode, L
 
                 g.setClip(clip);
 
-                // Caret
-                
                 renderCaret(g);
-                
 
             } else {
 
@@ -740,95 +764,7 @@ public class TextNode extends G2DNode implements IDynamicSelectionPainterNode, L
                 }
 
             }
-        } else {
-            // PDF 
-            // TODO: multiline support
-//                             try {
-                           AffineTransform at = g.getTransform();
-                           float height = writer.getPageSize().getHeight();
-                           Rectangle2D rr = textClip;
-       //                  Point2D pt1 = new Point2D.Double(rr.getX(), rr.getY()+rr.getHeight());
-       //                  Point2D pt2 = new Point2D.Double(rr.getX()+rr.getWidth(), rr.getY());
-                           Point2D pt1 = new Point2D.Double(0, 0);
-                           Point2D pt2 = new Point2D.Double(47.f/*+rr.getWidth()*/, -rr.getHeight());
-                           pt1 = at.transform(pt1, pt1);
-                           pt2 = at.transform(pt2, pt2);
-                               Rectangle rectangle = new Rectangle(
-                                               (float) pt1.getX(), 
-                                               height-(float) pt1.getY(), 
-                                               (float) pt2.getX(), 
-                                               height-(float) pt2.getY()); 
-
-                           FontMapper mapper = (FontMapper) g.getRenderingHint(G2DPDFRenderingHints.KEY_PDF_FONTMAPPER);
-//                             FontMetrics fm    = g.getFontMetrics(font);
-
-                               // TODO Oikea leveys
-                               // TODO Uniikki nimi
-                               /*
-                               PdfFormField field = PdfFormField.createTextField(writer, false, false, 20);
-                               field.setFieldName(this.getId().toString());
-                               field.setWidget(rectangle, PdfAnnotation.HIGHLIGHT_NONE);
-                               field.setQuadding(PdfFormField.Q_RIGHT);
-                               field.setFieldFlags(PdfFormField.FF_READ_ONLY);
-                               field.setRotate(90);
-                               writer.addAnnotation(field);
-                               */
-
-
-                               // Signature Field
-                               /*
-                               if (text==null) {
-                                       PdfFormField field = PdfFormField.createSignature(writer);
-                                       field.setWidget(rectangle, PdfAnnotation.HIGHLIGHT_NONE);
-                                       field.setFieldName(fieldName);
-                                       field.setQuadding(PdfFormField.Q_LEFT);
-                                       field.setFlags(PdfAnnotation.FLAGS_PRINT);
-                                       //field.setFieldFlags(PdfFormField.FF_READ_ONLY)
-                                       field.setFieldFlags(PdfFormField.FF_EDIT);
-                                       field.setPage();
-                                       field.setMKBackgroundColor( backgroundColor!=null?Color.WHITE:backgroundColor );
-                                       PdfAppearance tp = PdfAppearance.createAppearance(writer, 72, 48);
-                                       tp.rectangle(rectangle);
-                                       tp.stroke();                            
-                                       field.setAppearance(PdfAnnotation.APPEARANCE_NORMAL, tp);
-                                       writer.addAnnotation(field);
-                               } else */ 
-                               {
-                                       // Text Field
-                                               try {
-                                               TextField textField = new TextField(writer, rectangle, fieldName);
-                                               textField.setFieldName(fieldName);
-                                               textField.setFont(mapper.awtToPdf(font));
-                                               textField.setBorderStyle(0);
-                                           //textField.setAlignment(Element.ALIGN_LEFT);
-                                           textField.setAlignment(Element.ALIGN_BOTTOM);
-                                           textField.setRotation(90);
-                                       textField.setOptions(TextField.EDIT|TextField.DO_NOT_SPELL_CHECK);
-                                           if ( text!=null ) {
-                                                       textField.setText(text);
-                                           }
-                                           if ( color!=null ) {
-                                               textField.setTextColor(color);
-                                           }
-                                               textField.setBackgroundColor( backgroundColor!=null?Color.WHITE:backgroundColor );
-                                           PdfFormField field = textField.getTextField();
-                                           writer.addAnnotation(field);
-                                               } catch (IOException e) {
-                                                       e.printStackTrace();
-                                               } catch (DocumentException e) {
-                                                       e.printStackTrace();
-                                               }
-                               }
-
-//                             } catch (IOException e) {
-//                                     // TODO Auto-generated catch block
-//                                     e.printStackTrace();
-//                             } catch (DocumentException e) {
-//                                     // TODO Auto-generated catch block
-//                                     e.printStackTrace();
-//                             }
         }
-        /// PDF
 
         g.setClip(clipSave);