javafx框架tornadofx入门实战23_treeview_advanced

import com.dlsc.gemsfx.PDFView
import javafx.scene.control.*
import javafx.scene.image.Image
import javafx.scene.image.ImageView
import javafx.scene.layout.Priority
import javafx.scene.layout.StackPane
import javafx.scene.web.WebView
import org.apache.tika.Tika
import tornadofx.*
import java.io.File


class FileBrowserView : View("tornadofx入门23_treeview_advanced") {
    val leftFile = objectProperty<File>()
    val rightFile = objectProperty<File>()
    val fileTyle = stringProperty()
    lateinit var webEngine: WebView
    val pdfview = PDFView().apply { vgrow = Priority.ALWAYS }

    val img = objectProperty<Image>()
    val txt = stringProperty()
    lateinit var contentView: StackPane
    //    lateinit var txtV: TextArea
    lateinit var imgV: ImageView
    val rightRoot = objectProperty<TreeItem<File>>(TreeItem(File(".")))
    lateinit var rightTree: TreeView<File>

    val tika = Tika()

    override val root = borderpane {
        top {
        }
        left = hbox(4) {
            treeview<File> {
                root = TreeItem(File("."))
                populate {
                    it.value.listFiles()?.asList()?.filter {
                        it.isDirectory
                    }
                }
                bindSelected(leftFile)
                leftFile.onChange {
                    rightRoot.value = TreeItem(leftFile.value)
                    rightTree.populate {
                        it.value.listFiles()?.asList()
                    }
                }
                cellFormat {
                    text = it.name
                    graphic = nodeGraphic(it)
                }
                vgrow = Priority.ALWAYS
            }
            treeview<File> {
                rightTree = this
//                root = TreeItem(File("."))
                rootProperty().bind(rightRoot)
                isShowRoot = false
                populate {
                    it.value.listFiles()?.asList()
                }
                bindSelected(rightFile)
                rightFile.onChange {
                    val f = rightFile.value
                    displayFile(f)
                }
                cellFormat {
                    text = it.name
                    graphic =nodeGraphic(it)
                }
                vgrow = Priority.ALWAYS
            }
        }
        center = vbox {
            stackpane {
                imageview(img) {
                    imgV = this
                    fitWidth = 400.0
                    fitHeight = 400.0
                }
//                    textarea(txt) {
//                        txtV = this
//                        vgrow = Priority.ALWAYS
//                    }
                webview {//用于显示文本内容
                    webEngine = this
                    vgrow = Priority.ALWAYS
                }
                stackpane {
                    label()
                    contentView = this
                    vgrow = Priority.ALWAYS
                }
                vgrow = Priority.ALWAYS

            }
            label(stringBinding(fileTyle) { "文件类型：${this.value}" })
        }

        setPrefSize(1024.0, 768.0)
    }