SwingNodePropertyEditor: Use correct sizing for transfer function/his…

…togram chart

src/main/kotlin/sc/iview/ui/SwingNodePropertyEditor.kt

@@ -36,6 +36,7 @@ import graphics.scenery.Settings
 import graphics.scenery.volumes.TransferFunctionEditor
 import graphics.scenery.volumes.Volume
 import net.miginfocom.swing.MigLayout
+import org.jfree.chart.ChartPanel
 import org.joml.Quaternionf
 import org.joml.Vector3f
 import org.scijava.Context
@@ -66,7 +67,6 @@ import java.awt.event.MouseAdapter
 import java.awt.event.MouseEvent
 import java.util.concurrent.TimeUnit
 import java.util.concurrent.locks.ReentrantLock
-import javax.swing.JCheckBox
 import javax.swing.JFrame
 import javax.swing.JLabel
 import javax.swing.JMenuItem
@@ -366,10 +366,7 @@ class SwingNodePropertyEditor(private val sciView: SciView) : UIComponent<JPanel
                         val parent = inputPanel.component.components.find { it.name == "group:Volume" } as? JPanel
                         val tfe = TransferFunctionEditor(sceneNode)
                         tfe.preferredSize = Dimension(300, 300)
-
-                        // the next line is a workaround for a ChangeListener being attached to the Show Histogram checkbox,
-                        // which will continously show/hide the histogram on mouse over. We disable rollover to prevent this.
-                        (tfe.components.find { it is JCheckBox && it.text == "Show Histogram" } as? JCheckBox)?.isRolloverEnabled = false
+                        tfe.components.find { it is ChartPanel }?.minimumSize = Dimension(100, 200)
 
                         tfe.layout = MigLayout("fillx,flowy,insets 0 0 0 0".maybeActivateDebug(uiDebug), "[right,fill,grow]")
                         parent?.add(tfe, "span 2, growx")