Update osxgl.m

Author: MarekRatajczak2024

src/macosx/osxgl.m

@@ -65,6 +65,10 @@
 #define MINIMUM_WIDTH 48
 #define MINIMUM_HEIGHT 48
 
+/* by MAREK */
+#define FILE_URL_SIZE 254
+/* end by MAREK */
+
 /* Unsigned integer; data type only avaliable for OS X >= 10.5 */
 #if MAC_OS_X_VERSION_MIN_REQUIRED < 1050
 typedef unsigned int NSUInteger;
@@ -212,6 +216,9 @@ @interface ALOpenGLView : NSOpenGLView
    /* This is passed onto the event functions so we know where the event came from */
    ALLEGRO_DISPLAY* dpy_ptr;
 }
+/* by MAREK */
+- (id)initWithFrame:(NSRect)frameRect;
+/* end by MAREK */
 -(void)setAllegroDisplay: (ALLEGRO_DISPLAY*) ptr;
 -(ALLEGRO_DISPLAY*) allegroDisplay;
 -(void) reshape;
@@ -292,8 +299,119 @@ void _al_osx_mouse_was_installed(BOOL install) {
    });
 }
 
+/* by MAREK */
+@implementation NSString (Char)
+
+/*
+ * Convert a NSString to a char pointer
+*/
+-(char *)toChar{
+  const char* strUtf8 = [self UTF8String];
+  size_t len          = strlen(strUtf8) + 1;
+  char *toChar        = malloc(len);
+  memcpy(toChar, strUtf8, len);
+  return toChar;
+}
+@end
+/* end by MAREK */
+
 @implementation ALOpenGLView
 
+/*by MAREK*/
+- (id)initWithFrame:(NSRect)frameRect
+{
+    self = [super initWithFrame:frameRect];
+    if (self) {
+        // Register for file URL drops (e.g., images)
+        [self registerForDraggedTypes:@[NSPasteboardTypeFileURL]];
+        // Or other types like NSStringPboardType, NSFileContentsPboardType, etc.
+    }
+
+    NSString *cachesDirectory = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0];
+
+    // NSString *logPath = @"allegro5.log";
+    // freopen([logPath cStringUsingEncoding:NSASCIIStringEncoding], "a+", stderr);
+
+    return self;
+}
+
+// Drag-and-drop methods
+
+- (NSDragOperation)draggingEntered:(id<NSDraggingInfo>)sender {
+    NSPasteboard *pasteboard = [sender draggingPasteboard];
+    if ([[pasteboard types] containsObject:NSPasteboardTypeFileURL]) {
+        return NSDragOperationCopy;  // Accept copy operation for files
+    }
+    return NSDragOperationNone;
+}
+
+- (BOOL)prepareForDragOperation:(id<NSDraggingInfo>)sender {
+    return YES;  // Prepare to accept the drop
+}
+
+- (BOOL)performDragOperation:(id<NSDraggingInfo>)sender {
+    NSPasteboard *pasteboard = [sender draggingPasteboard];
+    NSArray *classes = @[NSURL.class];
+    NSDictionary *options = @{NSPasteboardURLReadingFileURLsOnlyKey: @YES};
+
+    int n=0;
+
+    NSArray<NSURL *> *fileURLs = [pasteboard readObjectsForClasses:classes options:options];
+    if (fileURLs.count > 0)
+    {
+        // Handle multiple dropped files here
+
+        for (NSURL *fileURL in fileURLs)
+        {
+                NSString *filePath = [fileURL path];
+                unsigned long ul=[filePath length];
+                NSLog(@"Dropped file: %@   len:%d", filePath, (int)ul);
+                const char *cfileURL= [filePath cStringUsingEncoding:NSUTF8StringEncoding];
+
+                // Process the file: e.g., load as texture, model, or data into OpenGL
+                // Example: If it's an image, use NSImage to load and upload to GL texture
+                // NSImage *image = [[NSImage alloc] initWithContentsOfURL:fileURL];
+                // Then convert to OpenGL texture...
+                ALLEGRO_DISPLAY_OSX_WIN* dpy =  (ALLEGRO_DISPLAY_OSX_WIN*) dpy_ptr;
+                NSWindow *window = dpy->win;
+
+                NSPoint mousePos = [window mouseLocationOutsideOfEventStream];
+                // mousePos.x and mousePos.y now contain the cursor's coordinates relative to the window's bottom-left corner.
+
+                NSRect rc = [window frame];
+                NSRect content = [window contentRectForFrameRect: rc];
+                content = [self convertRectToBacking: content];
+                ALLEGRO_EVENT_SOURCE *es = &dpy->parent.es;
+
+                _al_event_source_lock(es);
+                ALLEGRO_EVENT event;
+
+                event.drop.type = ALLEGRO_EVENT_DROP;
+                event.drop.timestamp = al_get_time();
+                event.drop.x = (int)mousePos.x;
+                event.drop.y = (int)mousePos.y;
+                NSLog(@"Event with file (%d/%d) : %@", n+1, (int)fileURLs.count, filePath);
+                event.drop.text = (char*) cfileURL;
+                event.drop.is_file = true;
+                event.drop.row = n;
+                if ((n+1)<(int)fileURLs.count) event.drop.is_complete = false;
+                else event.drop.is_complete = true;
+                _al_event_source_emit_event(es, &event);
+                _al_event_source_unlock(es);
+                n++;
+        }
+
+        return YES;
+    }
+    return NO;
+}
+
+- (void)concludeDragOperation:(id<NSDraggingInfo>)sender {
+    // Optional: Any cleanup after drop
+}
+
+/* end by MAREK*/
+
 -(void) prepareOpenGL
 {
    [super prepareOpenGL];