Implement wrapping in table cells

Author: Pyrofab

src/main/kotlin/ladysnake/translationhelper/TranslationHelper.kt

@@ -9,10 +9,12 @@ import ladysnake.translationhelper.view.TranslatorView
 import tornadofx.App
 import tornadofx.find
 import tornadofx.launch
+import tornadofx.reloadStylesheetsOnFocus
 import java.io.File
 
 class TranslationHelper: App(TranslatorView::class, AppStyle::class) {
     init {
+        reloadStylesheetsOnFocus()
         TranslationLoader.registerAdapter(PlainLanguageMapAdapter())
         TranslationLoader.registerAdapter(JsonLanguageMapAdapter())
     }

src/main/kotlin/ladysnake/translationhelper/view/TextAreaTableCell.kt

@@ -0,0 +1,108 @@
+package ladysnake.translationhelper.view
+
+import javafx.beans.property.ObjectProperty
+import javafx.beans.property.SimpleObjectProperty
+import javafx.event.EventHandler
+import javafx.scene.control.TableCell
+import javafx.scene.control.TextArea
+import javafx.scene.input.KeyCode
+import javafx.scene.input.KeyEvent
+import javafx.scene.text.Text
+import javafx.util.StringConverter
+
+class TextAreaTableCell<S, T>(converter: StringConverter<T>? = null) : TableCell<S, T>() {
+
+    private fun resizeToFitText() {
+        // Hack: to find out the text's actual height, we use a temporary Text widget
+        val txt = Text("${this.text}\n")
+        txt.wrappingWidth = this.tableColumn.width  // not using this cell's width, it can be 0 during init
+        this.prefHeight = txt.layoutBounds.height
+    }
+
+    private var textArea: TextArea? = null
+    private val converter: ObjectProperty<StringConverter<T>?> = SimpleObjectProperty(this, "converter")
+    fun converterProperty(): ObjectProperty<StringConverter<T>?> {
+        return converter
+    }
+
+    fun setConverter(value: StringConverter<T>?) {
+        converterProperty().set(value)
+    }
+
+    fun getConverter(): StringConverter<T>? {
+        return converterProperty().get()
+    }
+
+    override fun startEdit() {
+        if (!isEditable || !tableView.isEditable || !tableColumn.isEditable) {
+            return
+        }
+        super.startEdit()
+        if (isEditing) {
+            val textArea = this.textArea ?: this.createTextArea().also { this.textArea = it }
+            textArea.text = getItemText()
+            this.text = null
+            this.graphic = textArea
+            textArea.selectAll()
+            textArea.requestFocus()
+        }
+    }
+
+    private fun getItemText() = getConverter()?.toString(this.item) ?: this.item?.toString() ?: ""
+
+    private fun createTextArea(): TextArea {
+        val converter = getConverter()
+        val textArea = TextArea(getItemText())
+        textArea.addEventFilter(KeyEvent.KEY_PRESSED) { t: KeyEvent ->
+            if (t.code == KeyCode.ENTER && !t.isShiftDown) {
+                checkNotNull(converter) {
+                    ("Attempting to convert text input into Object, but provided "
+                            + "StringConverter is null. Be sure to set a StringConverter "
+                            + "in your cell factory.")
+                }
+                this.commitEdit(converter.fromString(textArea.text))
+                t.consume()
+            }
+        }
+        textArea.onKeyReleased = EventHandler { t: KeyEvent ->
+            if (t.code == KeyCode.ESCAPE) {
+                this.cancelEdit()
+                t.consume()
+            }
+        }
+        textArea.isWrapText = true
+        return textArea
+    }
+
+    override fun cancelEdit() {
+        super.cancelEdit()
+        this.text = getItemText()
+        this.graphic = null
+    }
+
+    override fun updateItem(item: T, empty: Boolean) {
+        super.updateItem(item, empty)
+        if (this.isEmpty) {
+            this.text = null
+            this.setGraphic(null)
+        } else {
+            if (this.isEditing) {
+                val textArea = textArea
+                if (textArea != null) {
+                    textArea.text = getItemText()
+                }
+                this.text = null
+                this.setGraphic(textArea)
+            } else {
+                this.text = getItemText()
+                this.setGraphic(null)
+            }
+        }
+        this.resizeToFitText()
+    }
+
+    init {
+        styleClass.add("text-area-table-cell")
+        setConverter(converter)
+    }
+}

src/main/kotlin/ladysnake/translationhelper/view/TranslatorView.kt

@@ -9,7 +9,6 @@ import javafx.scene.control.SelectionMode
 import javafx.scene.control.TableColumn
 import javafx.scene.control.TableView
 import javafx.scene.control.ToggleButton
-import javafx.scene.control.cell.TextFieldTableCell
 import javafx.scene.image.Image
 import javafx.stage.DirectoryChooser
 import javafx.stage.FileChooser
@@ -223,9 +222,10 @@ class TranslatorView : View() {
                 source.editableProperty.bindBidirectional(selectedProperty())
             }
             setCellFactory {
-                TextFieldTableCell<TranslationMap.TranslationRow, String>(DefaultStringConverter())
+                TextAreaTableCell<TranslationMap.TranslationRow, String>(DefaultStringConverter()).apply {
+                    isWrapText = true
+                }
             }
         }
     }
-
 }