feat(main.py): add feedback message system for operations and update UI rendering

croppa/main.py

@@ -125,6 +125,11 @@ class VideoEditor:
         self.progress_bar_text = ""
         self.progress_bar_fps = 0.0  # Current rendering FPS
         
+        # Feedback message state
+        self.feedback_message = ""
+        self.feedback_message_time = None
+        self.feedback_message_duration = 2.0  # seconds to show message
+        
         # Crop adjustment settings
         self.crop_size_step = self.CROP_SIZE_STEP
 
@@ -208,12 +213,15 @@ class VideoEditor:
             success = cv2.imwrite(str(screenshot_path), processed_frame)
             if success:
                 print(f"Screenshot saved: {screenshot_name}")
+                self.show_feedback_message(f"Screenshot saved: {screenshot_name}")
                 return True
             else:
                 print(f"Error: Could not save screenshot to {screenshot_path}")
+                self.show_feedback_message("Error: Could not save screenshot")
                 return False
         else:
             print("Error: Could not process frame for screenshot")
+            self.show_feedback_message("Error: Could not process frame")
             return False
 
     def _get_media_files_from_directory(self, directory: Path) -> List[Path]:
@@ -578,6 +586,52 @@ class VideoEditor:
         self.progress_bar_complete_time = None
         self.progress_bar_fps = 0.0
 
+    def show_feedback_message(self, message: str):
+        """Show a feedback message on screen for a few seconds"""
+        self.feedback_message = message
+        self.feedback_message_time = time.time()
+
+    def draw_feedback_message(self, frame):
+        """Draw feedback message on frame if visible"""
+        if not self.feedback_message or not self.feedback_message_time:
+            return
+        
+        # Check if message should still be shown
+        elapsed = time.time() - self.feedback_message_time
+        if elapsed > self.feedback_message_duration:
+            self.feedback_message = ""
+            self.feedback_message_time = None
+            return
+        
+        height, width = frame.shape[:2]
+        
+        # Calculate message position (center of frame)
+        font = cv2.FONT_HERSHEY_SIMPLEX
+        font_scale = 1.0
+        thickness = 2
+        
+        # Get text size
+        text_size = cv2.getTextSize(self.feedback_message, font, font_scale, thickness)[0]
+        text_x = (width - text_size[0]) // 2
+        text_y = (height + text_size[1]) // 2
+        
+        # Draw background rectangle
+        padding = 10
+        rect_x1 = text_x - padding
+        rect_y1 = text_y - text_size[1] - padding
+        rect_x2 = text_x + text_size[0] + padding
+        rect_y2 = text_y + padding
+        
+        # Semi-transparent background
+        overlay = frame.copy()
+        cv2.rectangle(overlay, (rect_x1, rect_y1), (rect_x2, rect_y2), (0, 0, 0), -1)
+        alpha = 0.7
+        cv2.addWeighted(overlay, alpha, frame, 1 - alpha, 0, frame)
+        
+        # Draw text with shadow
+        cv2.putText(frame, self.feedback_message, (text_x + 2, text_y + 2), font, font_scale, (0, 0, 0), thickness + 1)
+        cv2.putText(frame, self.feedback_message, (text_x, text_y), font, font_scale, (255, 255, 255), thickness)
+
     def draw_progress_bar(self, frame):
         """Draw progress bar on frame if visible - positioned at top with full width"""
         if not self.progress_bar_visible:
@@ -980,6 +1034,9 @@ class VideoEditor:
         # Draw progress bar (if visible)
         self.draw_progress_bar(canvas)
 
+        # Draw feedback message (if visible)
+        self.draw_feedback_message(canvas)
+
         window_title = "Image Editor" if self.is_image_mode else "Video Editor"
         cv2.imshow(window_title, canvas)