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Expressions V4


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Cookbook

exprv4:reference:objects:gui_snake

snake

`snake()` creates a Snake game widget.

This object is a GUI component. It supports the common GUI methods, but it does not expose additional Snake-specific methods.

Constructor

snake()

Creates a snake object.

Item Description
Syntax `snake()`
Arguments none
Returns snake object
game = snake().position(10, 10).size(300, 300);

Properties

Properties are read-only. Use methods to change values.

Property Type Description
`position_x` number X position.
`position_y` number Y position.
`size_width` number Width.
`size_height` number Height.
`visible` boolean Visibility state.
`enabled` boolean Enabled state.

Common Object Methods

to_string()

Returns a display string for the object.

Item Description
Syntax `value.to_string()`
Arguments none
Returns string

Example:

text = value.to_string();

`clone()` is not supported for `snake`.

Common GUI Methods

Most visible GUI controls support these methods.

position(x, y)

Sets the component position in pixels.

Item Description
Syntax `component.position(x, y)`
Arguments `x`: x position; `y`: y position
Returns component object

Example:

label().position(20, 10);

size(width, height)

Sets the component size in pixels. Width and height are clamped to at least `1`.

Some container objects, such as `panel()` and `group()`, use `size(-1, -1)` as a special fit-parent mode.

Item Description
Syntax `component.size(width, height)`
Arguments `width`: width in pixels; `height`: height in pixels
Returns component object

Example:

textinput().size(220, 26);

visible(enabled)

Shows or hides the component.

Item Description
Syntax `component.visible(enabled)`
Arguments `enabled`: boolean
Returns component object

Example:

status.visible(false);

enabled(enabled)

Enables or disables user interaction with the component.

Item Description
Syntax `component.enabled(enabled)`
Arguments `enabled`: boolean
Returns component object

Example:

run_button.enabled(false);

Methods

`snake` currently exposes the common GUI methods only.

Example

game = snake().position(10, 10).size(300, 300);
window().title('Snake').size(340, 360).add(game).show();

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exprv4/reference/objects/gui_snake.txt · Last modified: by andrej

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