104 lines
3.1 KiB
GDScript3
104 lines
3.1 KiB
GDScript3
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extends Control
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#"soft" because it isn't enforced if the grid wouldn't fit otherwise
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export var soft_minimum_columns : int = 2
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#these should come from the theme or from theme overrides
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export var grid_hseperation : int = 4
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export var grid_vseperation : int = 4
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var _node_width = -1
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var _node_height = -1
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onready var grid_container = $Scroll/VBox/GridContainer
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func _update_node_size():
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if len(grid_container.get_children()) == 0:
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return -1
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#duplicate a node, assuming they are all the same
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$MinSizeTesting.add_child(grid_container.get_child(0).duplicate())
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#set the size to the minimum
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$MinSizeTesting.get_child(0).rect_size = Vector2(0, 0)
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#get the smallest possible size they can contain
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_node_width = $MinSizeTesting.get_child(0).rect_size.x
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_node_height = $MinSizeTesting.get_child(0).rect_size.y
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#plus any seperation due to the grid
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_node_width += grid_hseperation
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_node_height += grid_vseperation
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#remove the copied node
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$MinSizeTesting.get_child(0).queue_free()
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func _process(_delta: float) -> void:
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_move_children_to_grid()
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#don't do anything if there are no children
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if len(grid_container.get_children()) == 0:
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return
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#don't do anything if the node's haven't got a size yet
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if _node_width == -1 or _node_height == -1:
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_update_node_size()
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return
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#window_size in case an issue occures with resizing
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var screen_width = min(rect_size.x, OS.window_size.x)
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var screen_height = min(rect_size.y, OS.window_size.y)
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#(columns - 1) means that it can still shrink in size
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grid_container.columns = max(1, int(screen_width/_node_width) - 1)
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#don't allow more columns than children (wasted space)
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grid_container.columns = min(grid_container.columns, grid_container.get_child_count())
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#this is used to adjust the columns so that maximum space avalible is used
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for _i in 10:
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var empty_rows = _calculate_empty_rows(grid_container.columns, screen_height)
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#check if perfect height already
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if empty_rows <= 0:
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break
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#disallow single width (unless required previously)
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if grid_container.columns <= soft_minimum_columns:
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break
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#check that it won't need to scroll if columns change
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if _get_rows(grid_container.columns - 1) * _node_height > screen_height:
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break
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grid_container.columns -= 1
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func _calculate_empty_rows(columns, screen_height):
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var rows = _get_rows(columns)
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var height_not_used : int = screen_height - rows * _node_height
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var empty_rows : int = height_not_used / _node_height
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return empty_rows
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func _get_rows(columns):
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# rows = children // columns + 1 (if remainder)
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var rows = grid_container.get_child_count() / columns
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rows += 1 if grid_container.get_child_count() % columns != 0 else 0
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return rows
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func _move_children_to_grid():
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#puts the children into the grid container
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#ignores the first 2 children (container and size tester)
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for _i in range(2, get_child_count()):
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var child = get_child(2)
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remove_child(child)
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grid_container.add_child(child)
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#allow getting nodes from the grid (null, no error version)
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func get_node_from_grid(node_path : NodePath) -> Node:
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if grid_container.has_node(node_path):
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return grid_container.get_node(node_path)
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else:
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return null
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