arek
7874a5f7c6
Add configurable key bindings (TOML), modifier-aware dispatch, mouse-driven pattern placement with preview and rotation, cell grid storage/rendering, and fractional/integer HiDPI scaling. Archive the input-and-placement change and sync its specs to main specs. Tests: Hashtable, Config, Grid, Pattern (4/4 pass).
61 lines
2.6 KiB
Markdown
61 lines
2.6 KiB
Markdown
# Spec Delta
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## Purpose
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Lets users select a Game of Life pattern, preview it under the mouse cursor, rotate it, and place copies on the grid with a click.
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## ADDED Requirements
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### Requirement: Selecting a pattern arms a placement tool
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The system SHALL activate a placement tool for the selected pattern when a `select:<pattern>` action is triggered, and show a preview following the cursor.
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#### Scenario: Tool activation
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- **WHEN** the user triggers `select:glider`
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- **THEN** a glider preview appears at the current cursor position
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- **AND** the placement tool remains active
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### Requirement: Preview follows cursor motion
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The system SHALL update the preview position to track the current mouse cursor cell while a tool is active.
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#### Scenario: Mouse moves
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- **WHEN** the user moves the mouse while a tool is active
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- **THEN** the preview moves to the cell under the cursor
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### Requirement: Tool can be rotated in 90-degree steps
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The system SHALL rotate the active preview by 90 degrees each time the rotate action is triggered.
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#### Scenario: Rotate preview
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- **WHEN** the user triggers the rotate action while a tool is active
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- **THEN** the preview rotates 90 degrees clockwise
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- **AND** remains at the same anchor cell
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### Requirement: Left click places the pattern when valid
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The system SHALL write the active pattern's alive cells into the grid at the preview position when the user left-clicks and the pattern fits entirely within the grid.
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#### Scenario: Valid placement
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- **WHEN** the user left-clicks while a tool is active and the preview fits in the grid
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- **THEN** the pattern's cells become alive in the grid
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- **AND** the tool remains active for further placement
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### Requirement: Invalid placement is rejected
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The system SHALL not modify the grid when a left click occurs while the preview extends outside the grid.
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#### Scenario: Out of bounds
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- **WHEN** the user left-clicks while the preview extends outside the grid
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- **THEN** no cells are changed
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- **AND** the tool remains active
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### Requirement: Escape cancels the active tool
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The system SHALL deactivate the placement tool and remove the preview when the cancel action is triggered.
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#### Scenario: Cancel placement
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- **WHEN** the user triggers the cancel action while a tool is active
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- **THEN** the preview disappears
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- **AND** no further clicks place a pattern until a tool is selected again
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### Requirement: Click without active tool does nothing
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The system SHALL ignore left clicks when no placement tool is active.
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#### Scenario: No tool
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- **WHEN** the user left-clicks while no tool is active
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- **THEN** the grid is unchanged |