Add "DragAndDropEnabled" option for window

Add "FileDraggingExited" event

v3/V3 Changes.md

@@ -43,8 +43,8 @@ When emitting an event in JS, it now sends the event to the application. This wi
 
 ## Window
 
-The Window API has largely remained the same, however there are a few changes to note. 
-
+The Window API has largely remained the same, however the methods are now on an instance of a window rather than the runtime. 
+Some notable differences are:
 - Windows now have a Name that identifies them. This is used to identify the window when emitting events.
 
 ## ClipBoard
@@ -61,11 +61,11 @@ Dialogs are now available in JavaScript!
 
 ## Drag and Drop
 
-TBD
+Native drag and drop can be enabled per-window. Simply set the `EnableDragAndDrop` window config option to `true` and the window will allow files to be dragged onto it. When this happens, the `events.FilesDropped` event will be emitted. The filenames can then be retrieved from the WindowEventContext using the `DroppedFiles()` method. This returns a slice of strings containing the filenames.
 
 ## Context Menus
 
-Context menus are contextual menus that are shown when the user right clicks on an element. Creating a context menu is the same as creating a standard menu , by using `app.NewMenu()`. To make the context menu available to a window, call `window.RegisterContextMenu(name, menu)`. The name will be the id of the context menu and used by the frontend.
+Context menus are contextual menus that are shown when the user right-clicks on an element. Creating a context menu is the same as creating a standard menu , by using `app.NewMenu()`. To make the context menu available to a window, call `window.RegisterContextMenu(name, menu)`. The name will be the id of the context menu and used by the frontend.
 
 To indicate that an element has a context menu, add the `data-contextmenu` attribute to the element. The value of this attribute should be the name of a context menu previously registered with the window.
 

v3/examples/drag-n-drop/main.go

@@ -32,6 +32,7 @@ func main() {
 			TitleBar:                application.MacTitleBarHiddenInsetUnified,
 			InvisibleTitleBarHeight: 50,
 		},
+		EnableDragAndDrop: true,
 	})
 
 	window.On(events.FilesDropped, func(ctx *application.WindowEventContext) {

v3/pkg/application/options_webview_window.go

@@ -39,6 +39,7 @@ type WebviewWindowOptions struct {
 	Hidden                          bool
 	EnableFraudulentWebsiteWarnings bool
 	Zoom                            float64
+	EnableDragAndDrop               bool
 }
 
 var WebviewWindowDefaults = &WebviewWindowOptions{

v3/pkg/application/webview_drag.m

@@ -22,7 +22,7 @@ extern void processDragItems(unsigned int windowId, char** arr, int length);
 - (NSDragOperation)draggingEntered:(id<NSDraggingInfo>)sender {
     NSPasteboard *pasteboard = [sender draggingPasteboard];
     if ([[pasteboard types] containsObject:NSFilenamesPboardType]) {
-        processWindowEvent(self.windowId, EventWebViewDraggingEntered);
+        processWindowEvent(self.windowId, EventWindowFileDraggingEntered);
         return NSDragOperationCopy;
     }
     return NSDragOperationNone;
@@ -30,7 +30,7 @@ extern void processDragItems(unsigned int windowId, char** arr, int length);
 
 
 - (void)draggingExited:(id<NSDraggingInfo>)sender {
-    NSLog(@"I am here!!!!");
+    processWindowEvent(self.windowId, EventWindowFileDraggingExited);
 }
 
 - (BOOL)prepareForDragOperation:(id<NSDraggingInfo>)sender {
@@ -39,6 +39,7 @@ extern void processDragItems(unsigned int windowId, char** arr, int length);
 
 - (BOOL)performDragOperation:(id<NSDraggingInfo>)sender {
     NSPasteboard *pasteboard = [sender draggingPasteboard];
+    processWindowEvent(self.windowId, EventWindowFileDraggingPerformed);
     if ([[pasteboard types] containsObject:NSFilenamesPboardType]) {
         NSArray *files = [pasteboard propertyListForType:NSFilenamesPboardType];
 		NSUInteger count = [files count];

v3/pkg/application/webview_window.go

@@ -657,8 +657,6 @@ func (w *WebviewWindow) error(message string, args ...any) {
 }
 
 func (w *WebviewWindow) handleDragAndDropMessage(event *dragAndDropMessage) {
-	println("Drag and drop message received for " + w.Name())
-	// Print filenames
 	ctx := newWindowEventContext()
 	ctx.setDroppedFiles(event.filenames)
 	for _, listener := range w.eventListeners[uint(events.FilesDropped)] {

v3/pkg/application/webview_window.m

@@ -525,6 +525,24 @@ extern bool hasListeners(unsigned int);
     }
 }
 
+- (void)windowFileDraggingEntered:(NSNotification *)notification {
+    if( hasListeners(EventWindowFileDraggingEntered) ) {
+        processWindowEvent(self.windowId, EventWindowFileDraggingEntered);
+    }
+}
+
+- (void)windowFileDraggingPerformed:(NSNotification *)notification {
+    if( hasListeners(EventWindowFileDraggingPerformed) ) {
+        processWindowEvent(self.windowId, EventWindowFileDraggingPerformed);
+    }
+}
+
+- (void)windowFileDraggingExited:(NSNotification *)notification {
+    if( hasListeners(EventWindowFileDraggingExited) ) {
+        processWindowEvent(self.windowId, EventWindowFileDraggingExited);
+    }
+}
+
 - (void)webView:(WKWebView *)webview didStartProvisionalNavigation:(WKNavigation *)navigation {
     if( hasListeners(EventWebViewDidStartProvisionalNavigation) ) {
         processWindowEvent(self.windowId, EventWebViewDidStartProvisionalNavigation);
@@ -549,17 +567,5 @@ extern bool hasListeners(unsigned int);
     }
 }
 
-- (void)webView:(WKWebView *)webview draggingEntered:(WKNavigation *)navigation {
-    if( hasListeners(EventWebViewDraggingEntered) ) {
-        processWindowEvent(self.windowId, EventWebViewDraggingEntered);
-    }
-}
-
-- (void)webView:(WKWebView *)webview draggingPerformed:(WKNavigation *)navigation {
-    if( hasListeners(EventWebViewDraggingPerformed) ) {
-        processWindowEvent(self.windowId, EventWebViewDraggingPerformed);
-    }
-}
-
 // GENERATED EVENTS END
 @end

v3/pkg/application/webview_window_darwin.go

@@ -18,7 +18,7 @@ package application
 extern void registerListener(unsigned int event);
 
 // Create a new Window
-void* windowNew(unsigned int id, int width, int height, bool fraudulentWebsiteWarningEnabled, bool frameless) {
+void* windowNew(unsigned int id, int width, int height, bool fraudulentWebsiteWarningEnabled, bool frameless, bool enableDragAndDrop) {
 
 	NSWindowStyleMask styleMask = NSWindowStyleMaskTitled | NSWindowStyleMaskClosable | NSWindowStyleMaskMiniaturizable | NSWindowStyleMaskResizable;
 	if (frameless) {
@@ -72,10 +72,12 @@ void* windowNew(unsigned int id, int width, int height, bool fraudulentWebsiteWa
 	delegate.webView = webView;
 	delegate.hideOnClose = false;
 
+	if( enableDragAndDrop ) {
 		WebviewDrag* dragView = [[WebviewDrag alloc] initWithFrame:NSMakeRect(0, 0, width-1, height-1)];
 		[view setAutoresizingMask:NSViewWidthSizable | NSViewHeightSizable];
 		[view addSubview:dragView];
 		dragView.windowId = id;
+	}
 
 	return window;
 }
@@ -1064,6 +1066,7 @@ func (w *macosWebviewWindow) run() {
 			C.int(w.parent.options.Height),
 			C.bool(w.parent.options.EnableFraudulentWebsiteWarnings),
 			C.bool(w.parent.options.Frameless),
+			C.bool(w.parent.options.EnableDragAndDrop),
 		)
 		w.setTitle(w.parent.options.Title)
 		w.setAlwaysOnTop(w.parent.options.AlwaysOnTop)

v3/pkg/events/events.go

@@ -130,8 +130,9 @@ type macEvents struct {
 	WebViewDidReceiveServerRedirectForProvisionalNavigation WindowEventType
 	WebViewDidFinishNavigation                              WindowEventType
 	WebViewDidCommitNavigation                              WindowEventType
-	WebViewDraggingEntered                                  WindowEventType
-	WebViewDraggingPerformed                                WindowEventType
+	WindowFileDraggingEntered                               WindowEventType
+	WindowFileDraggingPerformed                             WindowEventType
+	WindowFileDraggingExited                                WindowEventType
 }
 
 func newMacEvents() macEvents {
@@ -256,7 +257,8 @@ func newMacEvents() macEvents {
 		WebViewDidReceiveServerRedirectForProvisionalNavigation: 1141,
 		WebViewDidFinishNavigation:                              1142,
 		WebViewDidCommitNavigation:                              1143,
-		WebViewDraggingEntered:                                  1144,
-		WebViewDraggingPerformed:                                1145,
+		WindowFileDraggingEntered:                               1144,
+		WindowFileDraggingPerformed:                             1145,
+		WindowFileDraggingExited:                                1146,
 	}
 }

v3/pkg/events/events.h

@@ -126,10 +126,11 @@ extern void processWindowEvent(unsigned int, unsigned int);
 #define EventWebViewDidReceiveServerRedirectForProvisionalNavigation 1141
 #define EventWebViewDidFinishNavigation 1142
 #define EventWebViewDidCommitNavigation 1143
-#define EventWebViewDraggingEntered 1144
-#define EventWebViewDraggingPerformed 1145
+#define EventWindowFileDraggingEntered 1144
+#define EventWindowFileDraggingPerformed 1145
+#define EventWindowFileDraggingExited 1146
 
-#define MAX_EVENTS 1146
+#define MAX_EVENTS 1147
 
 
 #endif

v3/pkg/events/events.txt

@@ -118,7 +118,7 @@ mac:WebViewDidStartProvisionalNavigation
 mac:WebViewDidReceiveServerRedirectForProvisionalNavigation
 mac:WebViewDidFinishNavigation
 mac:WebViewDidCommitNavigation
-mac:WebViewDraggingEntered
-mac:WebViewDraggingPerformed
-
+mac:WindowFileDraggingEntered
+mac:WindowFileDraggingPerformed
+mac:WindowFileDraggingExited