1 files changed, 83 insertions, 0 deletions
diff --git a/src/main/scala/graphyx/gui/GravityPanel.scala b/src/main/scala/graphyx/gui/GravityPanel.scala
new file mode 100644
index 0000000..bdf5245
--- /dev/null
+++ b/src/main/scala/graphyx/gui/GravityPanel.scala
@@ -0,0 +1,83 @@
+/*
+ * Graphyx
+ * copyright (c) 2009 Jakob Odersky
+ * made available under the MIT License
+*/
+
+package graphyx.gui
+
+import scala.swing._
+import scala.swing.event._
+import scala.swing.GridBagPanel._
+import sims.geometry._
+
+class GravityPanel(container: Container) extends GridBagPanel{
+  
+  val c = new Constraints
+  c.fill = Fill.Both
+  this.border = Swing.EmptyBorder(3,3,3,3)
+  
+  val sldX = new Slider {max = 500; min = -500; preferredSize = minimumSize}
+  val lblX = new Label("0.0")
+  val sldY = new Slider {max = 500; min = -500; preferredSize = minimumSize}
+  val lblY = new Label("-9.81")
+  
+  c.gridx = 0
+  c.gridy = 0
+  c.weightx = 1.0
+  c.weighty = 0.0
+  super.add(new Label("Gravity"), c)
+  
+  c.gridx = 0
+  c.gridy = 1
+  c.weightx = 1.0
+  c.weighty = 0.0
+  super.add(new Label("X: "), c)
+  
+  c.gridx = 1
+  c.gridy = 1
+  c.weightx = 1.0
+  c.weighty = 0.0
+  super.add(sldX, c)
+  
+  c.gridx = 2
+  c.gridy = 1
+  c.weightx = 0.0
+  c.weighty = 0.0
+  super.add(lblX, c)
+  
+  c.gridx = 0
+  c.gridy = 2
+  c.weightx = 1.0
+  c.weighty = 0.0
+  super.add(new Label("Y: "), c)
+  
+  c.gridx = 1
+  c.gridy = 2
+  c.weightx = 1.0
+  c.weighty = 0.0
+  super.add(sldY, c)
+  
+  c.gridx = 2
+  c.gridy = 2
+  c.weightx = 0.0
+  c.weighty = 0.0
+  super.add(lblY, c)
+  
+  
+  listenTo(sldX, sldY)
+  
+  reactions += {
+    case ValueChanged(s) if (s == sldX || s == sldY) =>
+      container.scene.real.gravity = Vector2D(sldX.value / 10.0, sldY.value / 10.0)
+  }
+  
+  def update() = {
+    val g = container.scene.world.gravity
+    sldX.value = (g.x * 10).toInt
+    lblX.text = ((g.x * 10).toInt / 10.0).toString
+    sldY.value = (g.y * 10).toInt
+    lblY.text = ((g.y * 10).toInt / 10.0).toString
+  }
+  
+}