22fb04bddf
It is not uncommon to want to scroll to the most recently added child of a ScrollContainer (e.g. a chat box or activity log). This is a little tricky, since `ensure_control_visible` will not work on a node on the same frame as you add it. Let's at least document that you need to wait until the next frame. Relates to https://github.com/godotengine/godot-proposals/issues/3629. Backport of https://github.com/godotengine/godot/pull/55609. Co-authored-by: Yuri Sizov <pycbouh@users.noreply.github.com>
79 lines
4.3 KiB
XML
79 lines
4.3 KiB
XML
<?xml version="1.0" encoding="UTF-8" ?>
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<class name="ScrollContainer" inherits="Container" version="3.5">
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<brief_description>
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A helper node for displaying scrollable elements such as lists.
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</brief_description>
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<description>
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A ScrollContainer node meant to contain a [Control] child. ScrollContainers will automatically create a scrollbar child ([HScrollBar], [VScrollBar], or both) when needed and will only draw the Control within the ScrollContainer area. Scrollbars will automatically be drawn at the right (for vertical) or bottom (for horizontal) and will enable dragging to move the viewable Control (and its children) within the ScrollContainer. Scrollbars will also automatically resize the grabber based on the [member Control.rect_min_size] of the Control relative to the ScrollContainer. Works great with a [Panel] control. You can set [code]EXPAND[/code] on the children's size flags, so they will upscale to the ScrollContainer's size if it's larger (scroll is invisible for the chosen dimension).
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</description>
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<tutorials>
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</tutorials>
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<methods>
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<method name="ensure_control_visible">
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<return type="void" />
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<argument index="0" name="control" type="Control" />
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<description>
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Ensures the given [code]control[/code] is visible (must be a direct or indirect child of the ScrollContainer). Used by [member follow_focus].
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[b]Note:[/b] This will not work on a node that was just added during the same frame. If you want to scroll to a newly added child, you must wait until the next frame using [signal SceneTree.idle_frame]:
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[codeblock]
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add_child(child_node)
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yield(get_tree(), "idle_frame")
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ensure_control_visible(child_node)
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[/codeblock]
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</description>
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</method>
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<method name="get_h_scrollbar">
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<return type="HScrollBar" />
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<description>
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Returns the horizontal scrollbar [HScrollBar] of this [ScrollContainer].
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[b]Warning:[/b] This is a required internal node, removing and freeing it may cause a crash. If you wish to disable the horizontal scrollbar, use [member scroll_horizontal_enabled]. If you want to only hide it instead, use its [member CanvasItem.visible] property.
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</description>
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</method>
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<method name="get_v_scrollbar">
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<return type="VScrollBar" />
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<description>
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Returns the vertical scrollbar [VScrollBar] of this [ScrollContainer].
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[b]Warning:[/b] This is a required internal node, removing and freeing it may cause a crash. If you wish to disable the vertical scrollbar, use [member scroll_vertical_enabled]. If you want to only hide it instead, use its [member CanvasItem.visible] property.
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</description>
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</method>
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</methods>
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<members>
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<member name="follow_focus" type="bool" setter="set_follow_focus" getter="is_following_focus" default="false">
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If [code]true[/code], the ScrollContainer will automatically scroll to focused children (including indirect children) to make sure they are fully visible.
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</member>
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<member name="rect_clip_content" type="bool" setter="set_clip_contents" getter="is_clipping_contents" overrides="Control" default="true" />
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<member name="scroll_deadzone" type="int" setter="set_deadzone" getter="get_deadzone" default="0">
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</member>
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<member name="scroll_horizontal" type="int" setter="set_h_scroll" getter="get_h_scroll" default="0">
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The current horizontal scroll value.
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</member>
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<member name="scroll_horizontal_enabled" type="bool" setter="set_enable_h_scroll" getter="is_h_scroll_enabled" default="true">
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If [code]true[/code], enables horizontal scrolling.
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</member>
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<member name="scroll_vertical" type="int" setter="set_v_scroll" getter="get_v_scroll" default="0">
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The current vertical scroll value.
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</member>
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<member name="scroll_vertical_enabled" type="bool" setter="set_enable_v_scroll" getter="is_v_scroll_enabled" default="true">
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If [code]true[/code], enables vertical scrolling.
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</member>
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</members>
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<signals>
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<signal name="scroll_ended">
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<description>
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Emitted when scrolling stops.
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</description>
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</signal>
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<signal name="scroll_started">
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<description>
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Emitted when scrolling is started.
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</description>
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</signal>
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</signals>
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<constants>
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</constants>
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<theme_items>
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<theme_item name="bg" data_type="style" type="StyleBox">
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The background [StyleBox] of the [ScrollContainer].
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</theme_item>
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</theme_items>
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</class>
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