feat: preset batch editing (#2)

- feat: preset batch editing (1ddfe15347c7b903039dc270775dff267f5293fe)

presets.py

@@ -0,0 +1,101 @@
+"""
+ presets.py - Batch Generation Presets for Qwen Image Editor
+
+ Predefined prompt templates that enable batch generation
+ of images with common variations. Each preset defines a set of related prompts
+ that can be automatically applied to a base instruction to create multiple
+ diverse outputs.
+
+ Structure:
+ Each preset contains:
+ - 'count': Number of images to generate (1-4 depending on the preset and requirements)
+ - 'prompts': List of template strings to append to the base prompt
+ - 'description': Human-readable description shown in the UI
+
+ Example:
+ Base prompt: "a red car"
+ Multiview preset generates:
+ 1. "a red car, frontal view of the subject, facing camera directly"
+ 2. "a red car, left side view of subject, profile view from the left side"
+ 3. "a red car, right side view of subject, profile view from the right side"
+ 4. "a red car, back side view of subject, showing the rear/back view"
+
+ Borderless R&D
+ 
+"""
+
+PRESETS = {
+    "Multiview": {
+        "count": 4,
+        "prompts": [
+            "frontal view of the subject, facing camera directly",
+            "left side view of subject, profile view from the left side", 
+            "right side view of subject, profile view from the right side",
+            "back side view of subject, showing the rear/back view"
+        ],
+        "description": "Generate 4 different views of the subject"
+    },
+    "Style Variations": {
+        "count": 3, 
+        "prompts": [
+            "in realistic photography style, high detail",
+            "in cartoon/anime style, vibrant colors",
+            "in sketch drawing style, black and white outline"
+        ],
+        "description": "Apply different artistic styles to the subject"
+    },
+    "Lighting Conditions": {
+        "count": 3,
+        "prompts": [
+            "in bright daylight, clear sunny conditions",
+            "in golden hour lighting, warm sunset glow",
+            "in studio lighting, professional portrait setup"
+        ],
+        "description": "Render the subject under different lighting"
+    },
+    "Quick Hairstyles": {
+        "count": 3,
+        "prompts": [
+            "with long straight dark hair",
+            "with short blonde combover",
+            "with brunette hair tied up into updo style"
+        ],
+        "description": "Show the subject in different hairstyles"
+    },
+    "Color Comparison": {
+        "count": 2,
+        "prompts": [
+            "painted in matte black paint and red accents",
+            "covered in gold glitter over white fabric"
+        ],
+        "description": "Simple two-tone color comparison"
+    }
+}
+
+def get_preset_choices():
+    """
+    Return list of preset choices for Gradio dropdown.
+    
+    Returns:
+        list: [None] + list of preset names for dropdown selection
+    """
+    return [None] + list(PRESETS.keys())
+
+def get_preset_info(preset_name):
+    """
+    Get preset configuration by name.
+    
+    Args:
+        preset_name (str): Name of the preset to retrieve
+        
+    Returns:
+        dict or None: Preset configuration dictionary or None if not found
+    """
+    return PRESETS.get(preset_name, None)
+
+# To add presets at runtime:
+# PRESETS["New Preset Name"] = {
+#     "count": 2,
+#     "prompts": ["variation 1", "variation 2"],
+#     "description": "Description of new preset"
+# }