open markdown files by dropping them to main window

Author: DevCharly

CHANGES.md

@@ -3,6 +3,7 @@ Markdown Writer FX Change Log
 
 ## 0.8
 
+- Open markdown files by dropping them to main window.
 - Support Definition lists extension (FlexMark only).
 - "Cut", "Copy", "Paste" and "Select All" commands added to "Edit" menu.
 - "Cut" and "Copy" now cut/copy whole line if selection is empty.

src/main/java/org/markdownwriterfx/MainWindow.java

@@ -52,6 +52,7 @@
 import javafx.scene.control.ToolBar;
 import javafx.scene.input.KeyCode;
 import javafx.scene.input.KeyEvent;
+import javafx.scene.input.TransferMode;
 import javafx.scene.layout.BorderPane;
 import javafx.scene.layout.HBox;
 import javafx.scene.layout.Priority;
@@ -120,6 +121,22 @@ class MainWindow
 				e.consume();
 		});
 
+		// open markdown files dropped to main window
+		scene.setOnDragOver(e -> {
+			if (e.getDragboard().hasFiles())
+				e.acceptTransferModes(TransferMode.COPY);
+			e.consume();
+		});
+		scene.setOnDragDropped(e -> {
+			boolean success = false;
+			if (e.getDragboard().hasFiles()) {
+				fileEditorTabPane.openEditors(e.getDragboard().getFiles(), 0);
+				success = true;
+			}
+			e.setDropCompleted(success);
+			e.consume();
+		});
+
 		Platform.runLater(() -> stageFocusedProperty.bind(scene.getWindow().focusedProperty()));
 	}
 

src/main/java/org/markdownwriterfx/preview/WebViewPreview.java

@@ -67,6 +67,14 @@ private void createNodes() {
 		webView = new WebView();
 		webView.setFocusTraversable(false);
 
+		// disable WebView default drag and drop handler to allow dropping markdown files
+		webView.setOnDragEntered(null);
+		webView.setOnDragExited(null);
+		webView.setOnDragOver(null);
+		webView.setOnDragDropped(null);
+		webView.setOnDragDetected(null);
+		webView.setOnDragDone(null);
+
 		webView.getEngine().getLoadWorker().stateProperty().addListener((ob,o,n) -> {
 			if (n == State.SUCCEEDED && !runWhenLoadedList.isEmpty()) {
 				ArrayList<Runnable> runnables = new ArrayList<>(runWhenLoadedList);