# source_browser
## Grouping Selector
## Source Browser Item Model
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### SourceBrowserItem
``` python
def SourceBrowserItem(
item_type:str, group_key:str='', group_display:str='', group_count:int=0, grouping_mode:str='',
record:Optional=None, is_selected:bool=False
)->None:
```
*Item in the source browser virtual collection (header or record).*
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### build_source_items
``` python
def build_source_items(
transcriptions:List, # Available transcription records
selected_sources:List, # Currently selected sources
grouping_mode:str='media_path', # Grouping mode: "media_path" or "batch_id"
)->List: # Flat list with interleaved headers and records
```
*Build the items list for the source browser virtual collection.*
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### is_source_item_skippable
``` python
def is_source_item_skippable(
item:SourceBrowserItem, # Item to check
)->bool: # True if item is a group header (cursor should skip)
```
*Predicate for virtual collection is_skippable parameter.*
## Virtual Collection Column Definitions & Cell Renderer
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### render_source_empty
``` python
def render_source_empty(
)->Any: # Empty state component
```
*Render empty state when no transcription sources are available.*
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### create_source_cell_renderer
``` python
def create_source_cell_renderer(
toggle_url:str='', # URL for toggling source selection
select_all_url:str='', # URL for selecting all in a group
)->Callable: # render_cell(item: SourceBrowserItem, ctx: CellRenderContext) -> Any
```
*Create a render_cell callback for the source browser virtual
collection.*
## Source Browser (Virtual Collection)