org.simantics.district.network.ui/src/org/simantics/district/network/ui/DistrictTransformUtil.java

   1 package org.simantics.district.network.ui;
   2
   3 import java.awt.geom.AffineTransform;
   4 import java.awt.geom.Rectangle2D;
   5
   6 import org.simantics.g2d.participant.TransformUtil;
   7 import org.simantics.scenegraph.utils.GeometryUtils;
   8 import org.simantics.utils.page.MarginUtils;
   9 import org.simantics.utils.page.MarginUtils.Margins;
  10
  11 public class DistrictTransformUtil extends TransformUtil {
  12
  13     @Override
  14     public void fitArea(Rectangle2D controlArea, Rectangle2D diagramArea, Margins margins) {
  15         if (margins == null) {
  16             MarginUtils.Margin margin = MarginUtils.marginOf(40, 0, 0);
  17             margins = new MarginUtils.Margins(margin, margin, margin, margin);
  18         }
  19         org.simantics.scenegraph.utils.GeometryUtils.expandRectangle(diagramArea, -1);
  20         diagramArea = GeometryUtils.expandRectangle(diagramArea,
  21                 margins.top.diagramAbsolute,
  22                 margins.bottom.diagramAbsolute,
  23                 margins.left.diagramAbsolute,
  24                 margins.right.diagramAbsolute);
  25         controlArea = GeometryUtils.expandRectangle(controlArea,
  26                 -margins.top.controlAbsolute    - margins.top.controlRelative * controlArea.getHeight(),
  27                 -margins.bottom.controlAbsolute - margins.bottom.controlRelative * controlArea.getHeight(),
  28                 -margins.left.controlAbsolute   - margins.left.controlRelative * controlArea.getWidth(),
  29                 -margins.right.controlAbsolute  - margins.right.controlRelative * controlArea.getWidth());
  30
  31         double controlAspectRatio = controlArea.getWidth() / controlArea.getHeight();
  32         double canvasAspectRatio  = diagramArea.getWidth() / diagramArea.getHeight();
  33         // Control is really wide => center canvas horizontally, match vertically
  34         double scale = 1.0;
  35         double tx = 0.0;
  36         double ty = 0.0;
  37         if (controlAspectRatio>canvasAspectRatio)
  38         {
  39             scale = controlArea.getHeight() / diagramArea.getHeight();
  40             tx = ( controlArea.getWidth() - diagramArea.getWidth() * scale ) / 2;
  41         } else
  42             // Control is really tall => center canvas vertically, match horizontally
  43         {
  44             scale = controlArea.getWidth() / diagramArea.getWidth();
  45             ty = ( controlArea.getHeight() - diagramArea.getHeight() * scale ) / 2;
  46         }
  47         AffineTransform current = getTransform();
  48         double currentX = current.getScaleX();
  49         double targetX = scale;
  50         double toBeX = currentX;
  51         if (targetX > 0) {
  52             if (toBeX < targetX) {
  53                 while ((toBeX) < targetX) {
  54                     toBeX = toBeX * 2;
  55                 }
  56             } else {
  57                 while ((toBeX * 0.5) > targetX) {
  58                     toBeX = toBeX * 0.5;
  59                 }
  60             }
  61             //tx = tx * (1 - toBeX);
  62             //ty = ty * (1 - toBeX);
  63             AffineTransform at = new AffineTransform();
  64             at.translate(tx, ty);
  65             at.translate(controlArea.getMinX(), controlArea.getMinY());
  66             at.scale(toBeX, toBeX);
  67             at.translate(-diagramArea.getMinX(), -diagramArea.getMinY());
  68
  69             setTransform(at);
  70         } else {
  71             // negative, how, no can do?
  72
  73         }
  74     }
  75 }