Module: gameui.context

Source: ./gameui/context.reef

Overview

gameui/context.reef - Immediate mode UI context Part of reef-stdlib Game UI module

The UIContext is the core of the immediate mode UI system. Unlike retained mode UI where widgets are created once and persist, immediate mode rebuilds the UI every frame. This is simpler for game UIs that change frequently.

Usage pattern: let ctx = ui_context(surface, input) ui_begin_frame(ctx) if ui_button(ctx, "Play") { start_game() } if ui_checkbox(ctx, "Sound", &sound_enabled) { ... } ui_end_frame(ctx)

Types

StateEntry

Fields:

Name	Type
`id`	`int`
`float_value`	`float`
`bool_value`	`bool`
`has_float`	`bool`
`has_bool`	`bool`

UIContext

Fields:

Name	Type
`surf`	`surface.Surface`
`inp`	`input.InputState`
`st`	`style.Style`
`next_id`	`int`
`id_stack`	`[int]`
`id_stack_size`	`int`
`hot_id`	`int`
`active_id`	`int`
`cursor_x`	`float`
`cursor_y`	`float`
`line_height`	`float`
`indent_level`	`float`
`same_line`	`bool`
`clip_stack`	`[core.Rect]`
`clip_stack_size`	`int`
`state`	`[StateEntry]`
`state_count`	`int`

Functions

`fn ui_context(surf: surface.Surface, inp: input.InputState): UIContext`

`fn ui_context_with_style(surf: surface.Surface, inp: input.InputState, st: style.Style): UIContext`

`fn ui_surface(ctx: UIContext): surface.Surface`

`fn ui_input(ctx: UIContext): input.InputState`

`fn ui_style(ctx: UIContext): style.Style`

`fn ui_hot_id(ctx: UIContext): int`

`fn ui_active_id(ctx: UIContext): int`

`fn ui_gen_id(ctx: UIContext): int`

`fn ui_push_id(ctx: UIContext, id: int): UIContext`

`fn ui_pop_id(ctx: UIContext): UIContext`

`fn ui_get_id(ctx: UIContext, name: string): int`

`fn string_hash(s: string): int`

`fn string_length(s: string): int`

`fn char_at(s: string, idx: int): int`

`fn ui_set_hot(ctx: UIContext, id: int): UIContext`

`fn ui_set_active(ctx: UIContext, id: int): UIContext`

`fn ui_clear_active(ctx: UIContext): UIContext`

`fn ui_is_hot(ctx: UIContext, id: int): bool`

`fn ui_is_active(ctx: UIContext, id: int): bool`

`fn ui_cursor(ctx: UIContext): core.Point`

`fn ui_set_cursor(ctx: UIContext, x: float, y: float): UIContext`

`fn ui_advance_cursor(ctx: UIContext, dx: float, dy: float): UIContext`

`fn ui_same_line(ctx: UIContext): UIContext`

`fn ui_new_line(ctx: UIContext): UIContext`

`fn ui_indent(ctx: UIContext, amount: float): UIContext`

`fn ui_unindent(ctx: UIContext, amount: float): UIContext`

`fn ui_space(ctx: UIContext, amount: float): UIContext`

`fn ui_push_clip(ctx: UIContext, rect: core.Rect): UIContext`

`fn ui_pop_clip(ctx: UIContext): UIContext`

`fn ui_get_clip(ctx: UIContext): core.Rect`

`fn find_state(ctx: UIContext, id: int): int`

`fn ensure_state(ctx: UIContext, id: int): int`

`fn ui_get_float(ctx: UIContext, id: int, default: float): float`

`fn ui_set_float(ctx: UIContext, id: int, value: float): UIContext`

`fn ui_get_bool(ctx: UIContext, id: int, default: bool): bool`

`fn ui_set_bool(ctx: UIContext, id: int, value: bool): UIContext`

`fn reef_int_to_float(i: int): float`

`fn int_to_float_ctx(i: int): float`

Procedures

`proc ui_begin_frame(ctx: UIContext)`

`proc ui_end_frame(ctx: UIContext)`

`proc update_line_height(ctx: UIContext, height: float)`

`proc advance_after_widget(ctx: UIContext, width: float, height: float)`

Called after drawing a widget to advance cursor

Generated by reefc doc