View Mixin¶

Viewport operations (zoom), undo/redo history, screenshot capture, and view export.

adapters.mixins.view_mixin.ViewMixin ¶

Mixin for view operations.

get_screenshot ¶

get_screenshot() -> Dict[str, str]

Capture a screenshot of the CAD application window.

RETURNS	DESCRIPTION
`dict`	Dictionary with 'path' and 'data' (base64) TYPE: `Dict[str, str]`

RAISES	DESCRIPTION
`Exception`	If screenshot fails

export_view ¶

export_view() -> Dict[str, str]

Export current view using internal PNGOUT command.

This method uses ZWCAD's built-in PNGOUT command to export the drawing view to a PNG file. Unlike get_screenshot(), this method: - Works even if the window is minimized or obscured - Captures only the drawing content (no UI chrome) - Uses the CAD application's internal rendering

RETURNS	DESCRIPTION
`Dict[str, str]`	Dictionary with 'path' and 'data' (base64 encoded image)

RAISES	DESCRIPTION
`Exception`	If export fails

zoom_extents ¶

zoom_extents() -> bool

Zoom the active viewport to fit all drawing entities via COM.

RETURNS	DESCRIPTION
`bool`	True if successful, False otherwise.

refresh_view ¶

refresh_view() -> bool

Refresh the view using multiple techniques for maximum compatibility.

Uses a combination of techniques in fallback order: 1. Application.Refresh() (COM API - no undo/redo impact) 2. SendCommand with REDRAW (most reliable visual update) 3. Window click simulation (forces UI update)

Note: REDRAW command is not wrapped in UNDO to avoid complicating the undo/redo stack. If refresh_view is called during user operations, the REDRAW will be undone by the user's undo command anyway.

RETURNS	DESCRIPTION
`bool`	True if refresh was attempted (best effort approach)

undo ¶

undo(count: int = 1) -> bool

Undo last action(s).

PARAMETER	DESCRIPTION
`count`	Number of operations to undo (default: 1) TYPE: `int` DEFAULT: `1`

RETURNS	DESCRIPTION
`bool`	True if successful, False otherwise

redo ¶

redo(count: int = 1) -> bool

Redo last undone action(s).

PARAMETER	DESCRIPTION
`count`	Number of operations to redo (default: 1) TYPE: `int` DEFAULT: `1`

RETURNS	DESCRIPTION
`bool`	True if successful, False otherwise