Hover label profile for district elements.

[simantics/district.git] / org.simantics.district.network.ui / src / org / simantics / district / network / ui / nodes / DistrictNetworkHoverInfoNode.java

diff --git a/org.simantics.district.network.ui/src/org/simantics/district/network/ui/nodes/DistrictNetworkHoverInfoNode.java b/org.simantics.district.network.ui/src/org/simantics/district/network/ui/nodes/DistrictNetworkHoverInfoNode.java
new file mode 100644 (file)
index 0000000..cb7053a
--- /dev/null
+++ b/org.simantics.district.network.ui/src/org/simantics/district/network/ui/nodes/DistrictNetworkHoverInfoNode.java
@@ -0,0 +1,109 @@
+package org.simantics.district.network.ui.nodes;
+
+import java.awt.Color;
+import java.awt.Font;
+import java.awt.Graphics2D;
+import java.awt.geom.AffineTransform;
+import java.awt.geom.Point2D;
+import java.awt.geom.Rectangle2D;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicReference;
+
+import org.simantics.scenegraph.g2d.G2DNode;
+import org.simantics.scl.runtime.Lists;
+import org.simantics.scl.runtime.tuple.Tuple3;
+
+public class DistrictNetworkHoverInfoNode extends G2DNode implements HoverSensitiveNode {
+
+       private static final Font FONT = new Font(Font.DIALOG, Font.PLAIN, 12);
+
+       private static final long serialVersionUID = 1L;
+
+       public static final String NODE_KEY = "DISTRICT_NETWORK_HOVER_INFO";
+
+       private static final int W1 = 50;
+       private static final int W2 = 30;
+       private static final int PAD = 5;
+
+       private List<Tuple3> labels;
+
+       private Point2D origin;
+
+       private boolean hover = false;
+       
+       private static AtomicReference<DistrictNetworkHoverInfoNode> activeNode = new AtomicReference<>();
+
+       @Override
+       public void render(Graphics2D g) {
+               if (!hover || activeNode.get() != this)
+                       return;
+
+               AffineTransform ot = g.getTransform();
+               Font of = g.getFont();
+               doRender(g);
+               g.setFont(of);
+               g.setTransform(ot);
+       }
+
+       private void doRender(Graphics2D g) {
+               g.translate(origin.getX(), origin.getY());
+               double scale = 1.5 / g.getTransform().getScaleX();
+               g.scale(scale, scale);
+
+               g.setFont(FONT);
+               double rowHeight = g.getFontMetrics().getHeight() * 1.1;
+
+               g.setColor(Color.BLACK);
+               
+               for (Tuple3 t : labels) {
+                       g.translate(0.f, -rowHeight);
+                       
+                       if (t.c0 != null) {
+                               g.drawString((String) t.c0, -(W1 + PAD + W2), 0.f);
+                       }
+                       
+                       if (t.c1 != null) {
+                               int width1 = g.getFontMetrics().stringWidth((String) t.c1);
+                               g.drawString((String) t.c1, - width1, 0.f);
+                       }
+                       
+                       if (t.c2 != null) {
+                               g.drawString((String) t.c2, PAD, 0.f);
+                       }
+               }
+       }
+
+       @Override
+       public Rectangle2D getBoundsInLocal() {
+               return null;
+       }
+
+       @SuppressWarnings("unchecked")
+       public void setLabels(List<Tuple3> list) {
+               this.labels = Lists.reverse(list);
+       }
+
+       public void setOrigin(Point2D origin) {
+               this.origin = origin;
+       }
+
+       @Override
+       public boolean hover(boolean hover, boolean isConnectionTool) {
+               hover = hover && activeNode.updateAndGet(current -> current == null ? this : current) == this;
+               boolean changed = hover != this.hover;
+               this.hover = hover;
+               
+               if (changed) {
+                       if (!hover) activeNode.updateAndGet(current -> current == this ? null : current);
+                       repaint();
+               }
+               
+               return changed;
+       }
+       
+       @Override
+       public void delete() {
+               super.delete();
+               activeNode.getAndUpdate(current -> current == this ? null : current);
+       }
+}