jschneider · November 8, 2018 07:41 · Nov 8, 2018
diff --git a/MigPaneExtensions.kt b/MigPaneExtensions.kt
@@ -0,0 +1,96 @@
+import javafx.event.EventTarget
+import javafx.scene.Node
+import javafx.scene.Parent
+import net.miginfocom.layout.AC
+import net.miginfocom.layout.CC
+import net.miginfocom.layout.ConstraintParser
+import net.miginfocom.layout.LC
+import org.tbee.javafx.scene.layout.MigPane
+import tornadofx.*
+
+/**
+ * Contains helper classes for mig pane
+ *
+ * @author Johannes Schneider ([[email protected]](mailto:[email protected]))
+ */
+
+/**
+ * Creates a new mig pane
+ */
+fun EventTarget.migPane(op: MigPane.() -> Unit = {}): MigPane {
+  val migPane = MigPane()
+  return migPane.attachTo(this, op)
+}
+
+/**
+ * Modifies the layout constraints
+ */
+fun MigPane.layoutConstraints(op: LC.() -> Unit = {}) {
+  op(this.layoutConstraints)
+
+  //Force recalculation of debug state. The debug state is only checked when the setter is called
+  layoutConstraints = layoutConstraints
+}
+
+/**
+ * Parses the layout constraints from the given string
+ */
+fun MigPane.layoutConstraints(constraints: String) {
+  layoutConstraints = ConstraintParser.parseLayoutConstraint(ConstraintParser.prepare(constraints))
+
+  //Force recalculation of debug state. The debug state is only checked when the setter is called
+  layoutConstraints = layoutConstraints
+}
+
+/**
+ * Modifies the columns constraints
+ */
+fun MigPane.columnConstraints(op: AC.() -> Unit = {}) {
+  op(this.columnConstraints)
+}
+
+fun MigPane.columnConstraints(constraints: String) {
+  columnConstraints = ConstraintParser.parseColumnConstraints(ConstraintParser.prepare(constraints))
+}
+
+fun MigPane.rowConstraints(constraints: String) {
+  rowConstraints = ConstraintParser.parseRowConstraints(ConstraintParser.prepare(constraints))
+}
+
+/**
+ * Modifies the row constraints
+ */
+fun MigPane.rowConstraints(op: AC.() -> Unit = {}) {
+  op(this.rowConstraints)
+}
+
+fun <T : Node> T.componentConstraints(constraints: String): T {
+  val parent: Parent = this.parent ?: throw IllegalStateException("No parent set")
+
+  if (parent !is MigPane) {
+    throw IllegalStateException("Invalid parent type <${parent.javaClass.name}>. Expected <${MigPane::class.java.name}>")
+  }
+
+  parent.setComponentConstraints(this, constraints)
+  return this
+}
+
+/**
+ * Helper method to modify the constraints
+ */
+inline fun <T : Node> T.componentConstraints(op: (CC.() -> Unit)): T {
+  val parent: Parent = this.parent ?: throw IllegalStateException("No parent set")
+
+  if (parent !is MigPane) {
+    throw IllegalStateException("Invalid parent type <${parent.javaClass.name}>. Expected <${MigPane::class.java.name}>")
+  }
+
+  //Ensure there are components. If there are none, create them
+  if (parent.getComponentConstraints(this) == null) {
+    parent.setComponentConstraints(this, "")
+  }
+
+  val componentConstraints = parent.getComponentConstraints(this) ?: throw IllegalStateException("No constraints found")
+  componentConstraints.op()
+  return this
+}