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Merge pull request #97223 from AdriaandeJongh/clarify-canvasitem-visility-changed

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Docs: Clarify `CanvasItem` visibility properties and signals
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Rémi Verschelde 2024-09-23 16:13:53 +02:00
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doc/classes/CanvasItem.xml
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@ -528,6 +528,7 @@
<description>
Returns [code]true[/code] if the node is present in the [SceneTree], its [member visible] property is [code]true[/code] and all its ancestors are also visible. If any ancestor is hidden, this node will not be visible in the scene tree, and is therefore not drawn (see [method _draw]).
Visibility is checked only in parent nodes that inherit from [CanvasItem], [CanvasLayer], and [Window]. If the parent is of any other type (such as [Node], [AnimationPlayer], or [Node3D]), it is assumed to be visible.
[b]Note:[/b] This method does not take [member visibility_layer] into account, so even if this method returns [code]true[/code] the node might end up not being rendered.
</description>
</method>
<method name="make_canvas_position_local" qualifiers="const">
@ -622,7 +623,7 @@
The rendering layer in which this [CanvasItem] is rendered by [Viewport] nodes. A [Viewport] will render a [CanvasItem] if it and all its parents share a layer with the [Viewport]'s canvas cull mask.
</member>
<member name="visible" type="bool" setter="set_visible" getter="is_visible" default="true">
If [code]true[/code], this [CanvasItem] is drawn. The node is only visible if all of its ancestors are visible as well (in other words, [method is_visible_in_tree] must return [code]true[/code]).
If [code]true[/code], this [CanvasItem] may be drawn. Whether this [CanvasItem] is actually drawn depends on the visibility of all of its [CanvasItem] ancestors. In other words: this [CanvasItem] will be drawn when [method is_visible_in_tree] returns [code]true[/code] and all [CanvasItem] ancestors share at least one [member visibility_layer] with this [CanvasItem].
[b]Note:[/b] For controls that inherit [Popup], the correct way to make them visible is to call one of the multiple [code]popup*()[/code] functions instead.
</member>
<member name="y_sort_enabled" type="bool" setter="set_y_sort_enabled" getter="is_y_sort_enabled" default="false">
@ -647,17 +648,17 @@
</signal>
<signal name="hidden">
<description>
Emitted when becoming hidden.
Emitted when the [CanvasItem] becomes hidden, either because its own [member visible] property was set to [code]false[/code] or the [member visible] property of one of its [CanvasItem] ancestors was set to [code]false[/code].
</description>
</signal>
<signal name="item_rect_changed">
<description>
Emitted when the item's [Rect2] boundaries (position or size) have changed, or when an action is taking place that may have impacted these boundaries (e.g. changing [member Sprite2D.texture]).
Emitted when the [CanvasItem]'s boundaries (position or size) change, or when an action took place that may have affected these boundaries (e.g. changing [member Sprite2D.texture]).
</description>
</signal>
<signal name="visibility_changed">
<description>
Emitted when the visibility (hidden/visible) changes.
Emitted when the [CanvasItem]'s visibility changes, either because its own [member visible] property changed or because the visility of one of its [CanvasItem] ancestors changed (equivalent to a change in [method is_visible_in_tree]).
</description>
</signal>
</signals>