JavaFX/ScalaFX & 剪贴板：无法复制文件？
JavaFX/ScalaFX & Clipboard: Cannot copy files?
复制文件不起作用：
def toClipboard(selectedLinesOnly: Boolean = false): Unit = {
val clipboard = Clipboard.systemClipboard
val content = new ClipboardContent
val items: Iterable[FileRecord] = selectedLinesOnly match {
case true => tableView.selectionModel.value.selectedItems.toSeq
case false => tableView.items.value
}
val files = items.map(_.file)
println(s"COPY $files")
content.putFiles(files.toSeq)
clipboard.content = content
}
输出：[info] COPY [SFX][/tmp/test/a.txt, /tmp/test/b.txt]
没有要粘贴的文件。
def toClipboard(selectedLinesOnly: Boolean = false): Unit = {
val clipboard = Clipboard.systemClipboard
val content = new ClipboardContent
val items: Iterable[FileRecord] = selectedLinesOnly match {
case true => tableView.selectionModel.value.selectedItems.toSeq
case false => tableView.items.value
}
val files = items.map(_.file.getPath)
println(s"COPY $files")
content.putFilesByPath(files.toSeq)
clipboard.content = content
}
输出：[info] COPY [SFX][/tmp/test/a.txt, /tmp/test/b.txt]
没有要粘贴的文件。
def toClipboard(selectedLinesOnly: Boolean = false): Unit = {
val clipboard = Clipboard.systemClipboard
val content = new ClipboardContent
val items: Iterable[FileRecord] = selectedLinesOnly match {
case true => tableView.selectionModel.value.selectedItems.toSeq
case false => tableView.items.value
}
val files = items.map("file://" + _.file.getPath)
println(s"COPY $files")
content.putFilesByPath(files.toSeq)
clipboard.content = content
}
输出：[info] COPY [SFX][file:///tmp/test/a.txt, file:///tmp/test/b.txt]
没有要粘贴的文件。
但是可以将路径复制到字符串剪贴板：
def toClipboard(selectedLinesOnly: Boolean = false): Unit = {
val clipboard = Clipboard.systemClipboard
val content = new ClipboardContent
val items: Iterable[FileRecord] = selectedLinesOnly match {
case true => tableView.selectionModel.value.selectedItems.toSeq
case false => tableView.items.value
}
val files = items.map(_.file.getPath)
println(s"COPY $files")
content.putString(files.mkString(" "))
clipboard.content = content
}
现在这是在我的剪贴板中：“/tmp/test/a.txt /tmp/test/b.txt”
但我需要的是文件形式，而不是字符串形式。
如何在我的应用程序中复制文件？
我正在 Ubuntu 上使用 OpenJFX 8。
ClipBoard 没有像 FileUtils.copyDirectoryToDirectory 和 FileUtils.moveDirectoryToDirectory 那样的功能（又名复制或剪切）。剪贴板只能提供路径或一般数据。使用 Dragboard.
的拖放可以实现此功能
JavaFX 的拖板：
During the drag-and-drop gesture, various types of data can be
transferred such as text, images, URLs, files, bytes, and strings.
The javafx.scene.input.DragEvent class is the basic class used to
implement the drag-and-drop gesture. For more information on
particular methods and other classes in the javafx.scene.input
package, see the API documentation.
想了解更多，可以看这篇教程：Drag-and-Drop Feature in JavaFX Applications
拖板 JavaFX 代码示例：HelloDragAndDrop.java
package hellodraganddrop;
import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.input.*;
import javafx.scene.paint.Color;
import javafx.scene.text.Text;
import javafx.stage.Stage;
/**
* Demonstrates a drag-and-drop feature.
*/
public class HelloDragAndDrop extends Application {
@Override public void start(Stage stage) {
stage.setTitle("Hello Drag And Drop");
Group root = new Group();
Scene scene = new Scene(root, 400, 200);
scene.setFill(Color.LIGHTGREEN);
final Text source = new Text(50, 100, "DRAG ME");
source.setScaleX(2.0);
source.setScaleY(2.0);
final Text target = new Text(250, 100, "DROP HERE");
target.setScaleX(2.0);
target.setScaleY(2.0);
source.setOnDragDetected(new EventHandler <MouseEvent>() {
public void handle(MouseEvent event) {
/* drag was detected, start drag-and-drop gesture*/
System.out.println("onDragDetected");
/* allow any transfer mode */
Dragboard db = source.startDragAndDrop(TransferMode.ANY);
/* put a string on dragboard */
ClipboardContent content = new ClipboardContent();
content.putString(source.getText());
db.setContent(content);
event.consume();
}
});
target.setOnDragOver(new EventHandler <DragEvent>() {
public void handle(DragEvent event) {
/* data is dragged over the target */
System.out.println("onDragOver");
/* accept it only if it is not dragged from the same node
* and if it has a string data */
if (event.getGestureSource() != target &&
event.getDragboard().hasString()) {
/* allow for both copying and moving, whatever user chooses */
event.acceptTransferModes(TransferMode.COPY_OR_MOVE);
}
event.consume();
}
});
target.setOnDragEntered(new EventHandler <DragEvent>() {
public void handle(DragEvent event) {
/* the drag-and-drop gesture entered the target */
System.out.println("onDragEntered");
/* show to the user that it is an actual gesture target */
if (event.getGestureSource() != target &&
event.getDragboard().hasString()) {
target.setFill(Color.GREEN);
}
event.consume();
}
});
target.setOnDragExited(new EventHandler <DragEvent>() {
public void handle(DragEvent event) {
/* mouse moved away, remove the graphical cues */
target.setFill(Color.BLACK);
event.consume();
}
});
target.setOnDragDropped(new EventHandler <DragEvent>() {
public void handle(DragEvent event) {
/* data dropped */
System.out.println("onDragDropped");
/* if there is a string data on dragboard, read it and use it */
Dragboard db = event.getDragboard();
boolean success = false;
if (db.hasString()) {
target.setText(db.getString());
success = true;
}
/* let the source know whether the string was successfully
* transferred and used */
event.setDropCompleted(success);
event.consume();
}
});
source.setOnDragDone(new EventHandler <DragEvent>() {
public void handle(DragEvent event) {
/* the drag-and-drop gesture ended */
System.out.println("onDragDone");
/* if the data was successfully moved, clear it */
if (event.getTransferMode() == TransferMode.MOVE) {
source.setText("");
}
event.consume();
}
});
root.getChildren().add(source);
root.getChildren().add(target);
stage.setScene(scene);
stage.show();
}
public static void main(String[] args) {
Application.launch(args);
}
}
实际上Java有一些复制文件的方法：4 Ways to Copy File in Java
资源Link：
我用 Ubuntu 测试成功的解决方案：
FilesTransferable.scala
package myapp.clipboard
import java.awt.datatransfer._
case class FilesTransferable(files: Iterable[String]) extends Transferable {
val clipboardString: String = "copy\n" + files.map(path => s"file://$path").mkString("\n")
val dataFlavor = new DataFlavor("x-special/gnome-copied-files")
def getTransferDataFlavors(): Array[DataFlavor] = {
Seq(dataFlavor).toArray
}
def isDataFlavorSupported(flavor: DataFlavor): Boolean = {
dataFlavor.equals(flavor)
}
@throws(classOf[UnsupportedFlavorException])
@throws(classOf[java.io.IOException])
def getTransferData(flavor: DataFlavor): Object = {
if(flavor.getRepresentationClass() == classOf[java.io.InputStream]) {
new java.io.ByteArrayInputStream(clipboardString.getBytes())
} else {
return null;
}
}
}
Clipboard.scala
package myapp.clipboard
import java.awt.Toolkit
import java.awt.datatransfer._
object Clipboard {
def toClipboard(
transferable: Transferable,
lostOwnershipCallback: (Clipboard, Transferable) => Unit =
{ (clipboard: Clipboard, contents: Transferable) => Unit }
): Unit = {
Toolkit.getDefaultToolkit.getSystemClipboard.setContents(
transferable,
new ClipboardOwner {
def lostOwnership(clipboard: Clipboard, contents: Transferable): Unit = {
lostOwnershipCallback(clipboard, contents)
}
}
)
}
}
这样的基本功能有很多代码（但仍然不是 OS 独立的）。
用法示例：
val transferable = FilesTransferable(filePaths)
myapp.clipboard.Clipboard.toClipboard(transferable, { (cb, contents) =>
println(s"lost clipboard ownership (clipboard: $cb)")
})
如果 Java-AWT/Swing/JavaFX/Scala-Swing/ScalaFX 中确实还没有任何解决方案（实际上，我仍然不敢相信），我的计划是构建一个易于使用的剪贴板至少支持 OS X、Ubuntu 和 Windows.
的库
复制文件不起作用：
def toClipboard(selectedLinesOnly: Boolean = false): Unit = {
val clipboard = Clipboard.systemClipboard
val content = new ClipboardContent
val items: Iterable[FileRecord] = selectedLinesOnly match {
case true => tableView.selectionModel.value.selectedItems.toSeq
case false => tableView.items.value
}
val files = items.map(_.file)
println(s"COPY $files")
content.putFiles(files.toSeq)
clipboard.content = content
}
输出：[info] COPY [SFX][/tmp/test/a.txt, /tmp/test/b.txt]
没有要粘贴的文件。
def toClipboard(selectedLinesOnly: Boolean = false): Unit = {
val clipboard = Clipboard.systemClipboard
val content = new ClipboardContent
val items: Iterable[FileRecord] = selectedLinesOnly match {
case true => tableView.selectionModel.value.selectedItems.toSeq
case false => tableView.items.value
}
val files = items.map(_.file.getPath)
println(s"COPY $files")
content.putFilesByPath(files.toSeq)
clipboard.content = content
}
输出：[info] COPY [SFX][/tmp/test/a.txt, /tmp/test/b.txt]
没有要粘贴的文件。
def toClipboard(selectedLinesOnly: Boolean = false): Unit = {
val clipboard = Clipboard.systemClipboard
val content = new ClipboardContent
val items: Iterable[FileRecord] = selectedLinesOnly match {
case true => tableView.selectionModel.value.selectedItems.toSeq
case false => tableView.items.value
}
val files = items.map("file://" + _.file.getPath)
println(s"COPY $files")
content.putFilesByPath(files.toSeq)
clipboard.content = content
}
输出：[info] COPY [SFX][file:///tmp/test/a.txt, file:///tmp/test/b.txt]
没有要粘贴的文件。
但是可以将路径复制到字符串剪贴板：
def toClipboard(selectedLinesOnly: Boolean = false): Unit = {
val clipboard = Clipboard.systemClipboard
val content = new ClipboardContent
val items: Iterable[FileRecord] = selectedLinesOnly match {
case true => tableView.selectionModel.value.selectedItems.toSeq
case false => tableView.items.value
}
val files = items.map(_.file.getPath)
println(s"COPY $files")
content.putString(files.mkString(" "))
clipboard.content = content
}
现在这是在我的剪贴板中：“/tmp/test/a.txt /tmp/test/b.txt”
但我需要的是文件形式，而不是字符串形式。
如何在我的应用程序中复制文件？
我正在 Ubuntu 上使用 OpenJFX 8。
ClipBoard 没有像 FileUtils.copyDirectoryToDirectory 和 FileUtils.moveDirectoryToDirectory 那样的功能（又名复制或剪切）。剪贴板只能提供路径或一般数据。使用 Dragboard.
JavaFX 的拖板：
During the drag-and-drop gesture, various types of data can be transferred such as
text, images, URLs, files, bytes, and strings.The
javafx.scene.input.DragEventclass is the basic class used to implement the drag-and-drop gesture. For more information on particular methods and other classes in thejavafx.scene.inputpackage, see the API documentation.
想了解更多，可以看这篇教程：Drag-and-Drop Feature in JavaFX Applications
拖板 JavaFX 代码示例：HelloDragAndDrop.java
package hellodraganddrop;
import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.input.*;
import javafx.scene.paint.Color;
import javafx.scene.text.Text;
import javafx.stage.Stage;
/**
* Demonstrates a drag-and-drop feature.
*/
public class HelloDragAndDrop extends Application {
@Override public void start(Stage stage) {
stage.setTitle("Hello Drag And Drop");
Group root = new Group();
Scene scene = new Scene(root, 400, 200);
scene.setFill(Color.LIGHTGREEN);
final Text source = new Text(50, 100, "DRAG ME");
source.setScaleX(2.0);
source.setScaleY(2.0);
final Text target = new Text(250, 100, "DROP HERE");
target.setScaleX(2.0);
target.setScaleY(2.0);
source.setOnDragDetected(new EventHandler <MouseEvent>() {
public void handle(MouseEvent event) {
/* drag was detected, start drag-and-drop gesture*/
System.out.println("onDragDetected");
/* allow any transfer mode */
Dragboard db = source.startDragAndDrop(TransferMode.ANY);
/* put a string on dragboard */
ClipboardContent content = new ClipboardContent();
content.putString(source.getText());
db.setContent(content);
event.consume();
}
});
target.setOnDragOver(new EventHandler <DragEvent>() {
public void handle(DragEvent event) {
/* data is dragged over the target */
System.out.println("onDragOver");
/* accept it only if it is not dragged from the same node
* and if it has a string data */
if (event.getGestureSource() != target &&
event.getDragboard().hasString()) {
/* allow for both copying and moving, whatever user chooses */
event.acceptTransferModes(TransferMode.COPY_OR_MOVE);
}
event.consume();
}
});
target.setOnDragEntered(new EventHandler <DragEvent>() {
public void handle(DragEvent event) {
/* the drag-and-drop gesture entered the target */
System.out.println("onDragEntered");
/* show to the user that it is an actual gesture target */
if (event.getGestureSource() != target &&
event.getDragboard().hasString()) {
target.setFill(Color.GREEN);
}
event.consume();
}
});
target.setOnDragExited(new EventHandler <DragEvent>() {
public void handle(DragEvent event) {
/* mouse moved away, remove the graphical cues */
target.setFill(Color.BLACK);
event.consume();
}
});
target.setOnDragDropped(new EventHandler <DragEvent>() {
public void handle(DragEvent event) {
/* data dropped */
System.out.println("onDragDropped");
/* if there is a string data on dragboard, read it and use it */
Dragboard db = event.getDragboard();
boolean success = false;
if (db.hasString()) {
target.setText(db.getString());
success = true;
}
/* let the source know whether the string was successfully
* transferred and used */
event.setDropCompleted(success);
event.consume();
}
});
source.setOnDragDone(new EventHandler <DragEvent>() {
public void handle(DragEvent event) {
/* the drag-and-drop gesture ended */
System.out.println("onDragDone");
/* if the data was successfully moved, clear it */
if (event.getTransferMode() == TransferMode.MOVE) {
source.setText("");
}
event.consume();
}
});
root.getChildren().add(source);
root.getChildren().add(target);
stage.setScene(scene);
stage.show();
}
public static void main(String[] args) {
Application.launch(args);
}
}
实际上Java有一些复制文件的方法：4 Ways to Copy File in Java
资源Link：
我用 Ubuntu 测试成功的解决方案：
FilesTransferable.scala
package myapp.clipboard
import java.awt.datatransfer._
case class FilesTransferable(files: Iterable[String]) extends Transferable {
val clipboardString: String = "copy\n" + files.map(path => s"file://$path").mkString("\n")
val dataFlavor = new DataFlavor("x-special/gnome-copied-files")
def getTransferDataFlavors(): Array[DataFlavor] = {
Seq(dataFlavor).toArray
}
def isDataFlavorSupported(flavor: DataFlavor): Boolean = {
dataFlavor.equals(flavor)
}
@throws(classOf[UnsupportedFlavorException])
@throws(classOf[java.io.IOException])
def getTransferData(flavor: DataFlavor): Object = {
if(flavor.getRepresentationClass() == classOf[java.io.InputStream]) {
new java.io.ByteArrayInputStream(clipboardString.getBytes())
} else {
return null;
}
}
}
Clipboard.scala
package myapp.clipboard
import java.awt.Toolkit
import java.awt.datatransfer._
object Clipboard {
def toClipboard(
transferable: Transferable,
lostOwnershipCallback: (Clipboard, Transferable) => Unit =
{ (clipboard: Clipboard, contents: Transferable) => Unit }
): Unit = {
Toolkit.getDefaultToolkit.getSystemClipboard.setContents(
transferable,
new ClipboardOwner {
def lostOwnership(clipboard: Clipboard, contents: Transferable): Unit = {
lostOwnershipCallback(clipboard, contents)
}
}
)
}
}
这样的基本功能有很多代码（但仍然不是 OS 独立的）。
用法示例：
val transferable = FilesTransferable(filePaths)
myapp.clipboard.Clipboard.toClipboard(transferable, { (cb, contents) =>
println(s"lost clipboard ownership (clipboard: $cb)")
})
如果 Java-AWT/Swing/JavaFX/Scala-Swing/ScalaFX 中确实还没有任何解决方案（实际上，我仍然不敢相信），我的计划是构建一个易于使用的剪贴板至少支持 OS X、Ubuntu 和 Windows.
的库