UIAnchorLayout

Class

Source: UIAnchorLayout.h

Inherits from: UILayout

Description

Layout that positions elements at fixed anchor points on the screen.

This layout positions UI elements at fixed anchor points (corners, center, etc.) without reflow. Very efficient for HUDs, debug UI, and fixed-position elements. Positions are calculated once or when screen size changes.

Inheritance

UILayout → UIAnchorLayout

Methods

void addElement(UIElement* element, Anchor anchor)

Description:

Adds a UI element with a specific anchor point.

Parameters:

• element: Pointer to the element to add.
• anchor: Anchor point for positioning.

void addElement(UIElement* element)

Description:

Adds a UI element to the layout (defaults to TOP_LEFT anchor).

Parameters:

• element: Pointer to the element to add.

void removeElement(UIElement* element)

Description:

Removes a UI element from the layout.

Parameters:

• element: Pointer to the element to remove.

void updateLayout()

Description:

Recalculates positions of all elements based on anchors.

void handleInput(const pixelroot32::input::InputManager& input)

Description:

Handles input (no-op for anchor layout, elements handle their own input).

Parameters:

• input: Reference to the InputManager.

void update(unsigned long deltaTime)

Description:

Updates the layout and child elements.

Parameters:

• deltaTime: Time elapsed since last frame in milliseconds.

void draw(pixelroot32::graphics::Renderer& renderer)

Description:

Draws all elements.

Parameters:

• renderer: Reference to the renderer.

void setScreenSize(int screenWidth, int screenHeight)

Description:

Sets the screen size for anchor calculations.

Parameters:

• screenWidth: Screen width in pixels.
• screenHeight: Screen height in pixels.

pixelroot32::math::Scalar getScreenWidth() const

Description:

Gets the screen width.

Returns: Screen width in pixels.

pixelroot32::math::Scalar getScreenHeight() const

Description:

Gets the screen height.

Returns: Screen height in pixels.

void calculateAnchorPosition(UIElement* element, Anchor anchor, pixelroot32::math::Scalar& outX, pixelroot32::math::Scalar& outY) const

Description:

Calculates position for an element based on its anchor.

Parameters:

• element: The element to position.
• anchor: The anchor point.
• outX: Output parameter for calculated X position.
• outY: Output parameter for calculated Y position.