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.maps.MapScalingTransform;
   8 import org.simantics.scenegraph.utils.GeometryUtils;
   9 import org.simantics.utils.page.MarginUtils;
  10 import org.simantics.utils.page.MarginUtils.Margins;
  11
  12 public class DistrictTransformUtil extends TransformUtil {
  13
  14     @Override
  15     public void fitArea(Rectangle2D controlArea, Rectangle2D diagramArea, Margins margins) {
  16         if (margins == null) {
  17             MarginUtils.Margin margin = MarginUtils.marginOf(40, 0, 0);
  18             margins = new MarginUtils.Margins(margin, margin, margin, margin);
  19         }
  20         org.simantics.scenegraph.utils.GeometryUtils.expandRectangle(diagramArea, -1);
  21         diagramArea = GeometryUtils.expandRectangle(diagramArea,
  22                 margins.top.diagramAbsolute,
  23                 margins.bottom.diagramAbsolute,
  24                 margins.left.diagramAbsolute,
  25                 margins.right.diagramAbsolute);
  26         controlArea = GeometryUtils.expandRectangle(controlArea,
  27                 -margins.top.controlAbsolute    - margins.top.controlRelative * controlArea.getHeight(),
  28                 -margins.bottom.controlAbsolute - margins.bottom.controlRelative * controlArea.getHeight(),
  29                 -margins.left.controlAbsolute   - margins.left.controlRelative * controlArea.getWidth(),
  30                 -margins.right.controlAbsolute  - margins.right.controlRelative * controlArea.getWidth());
  31
  32         double controlAspectRatio = controlArea.getWidth() / controlArea.getHeight();
  33         double canvasAspectRatio  = diagramArea.getWidth() / diagramArea.getHeight();
  34         // Control is really wide => center canvas horizontally, match vertically
  35         double scale = 1.0;
  36         double tx = 0.0;
  37         double ty = 0.0;
  38         if (controlAspectRatio>canvasAspectRatio)
  39         {
  40             scale = controlArea.getHeight() / diagramArea.getHeight();
  41             tx = ( controlArea.getWidth() - diagramArea.getWidth() * scale ) / 2;
  42         } else
  43             // Control is really tall => center canvas vertically, match horizontally
  44         {
  45             scale = controlArea.getWidth() / diagramArea.getWidth();
  46             ty = ( controlArea.getHeight() - diagramArea.getHeight() * scale ) / 2;
  47         }
  48         AffineTransform current = getTransform();
  49         double currentX = current.getScaleX();
  50         double targetX = scale;
  51         double toBeX = currentX;
  52         if (targetX > 0) {
  53             // let's check that targetX zoomLevel is between 0-20
  54             AffineTransform tar = new AffineTransform();
  55             tar.scale(toBeX, toBeX);
  56             int tarZoomLevel = MapScalingTransform.zoomLevel(tar);
  57             if (tarZoomLevel < 20 && tarZoomLevel > 0) {
  58                 if (toBeX < targetX) {
  59                     while ((toBeX * 0.5) < targetX) {
  60                         toBeX = toBeX * 2;
  61                         AffineTransform tr = new AffineTransform();
  62                         tr.scale(toBeX, toBeX);
  63                         int zoomLevel = MapScalingTransform.zoomLevel(tr);
  64                         if (zoomLevel >= 20) { // let's not zoom too close
  65                             break;
  66                         }
  67                     }
  68                 } else {
  69                     while ((toBeX * 0.25) > targetX) {
  70                         toBeX = toBeX * 0.5;
  71                         AffineTransform tr = new AffineTransform();
  72                         tr.scale(toBeX, toBeX);
  73                         if (MapScalingTransform.zoomLevel(tr) <= 0) { // let's not zoom too far away
  74                             break;
  75                         }
  76                     }
  77                 }
  78             }
  79             AffineTransform at = new AffineTransform();
  80             at.translate(tx, ty);
  81             at.translate(controlArea.getMinX(), controlArea.getMinY());
  82             at.scale(toBeX, toBeX);
  83             at.translate(-diagramArea.getMinX(), -diagramArea.getMinY());
  84             setTransform(at);
  85         } else {
  86             // negative, how, no can do?
  87
  88         }
  89     }
  90 }