Extension-Druid/docs_md/components/base/static_grid_manual.md

Druid Static Grid Component

Description

The Static Grid component handles the positioning of UI elements in a grid layout with rows and columns. It provides a way to organize nodes in a structured grid with consistent spacing.

Features

• Automatic positioning of nodes in rows and columns
• Customizable number of elements per row
• Dynamic addition and removal of nodes
• Node sorting capabilities
• Events for grid changes
• Automatic size calculation

Basic Usage

local grid = self.druid:new_grid("parent_node", "item_prefab", 3)

-- Add nodes to the grid
local node1 = gui.clone(prefab)
local node2 = gui.clone(prefab)
grid:add(node1)
grid:add(node2)

Parameters

• parent_node: The node or node_id of the parent container where grid items will be placed
• item_prefab: The node or node_id of the item prefab (used to determine item size)
• in_row: (optional) Number of items per row (default: 1)

Methods

-- Add a node to the grid
local node = gui.clone(prefab)
grid:add(node)

-- Add multiple nodes
grid:add_many({node1, node2, node3})

-- Remove a node from the grid
grid:remove(node)

-- Clear all nodes from the grid
grid:clear()

-- Get node position by index
local position = grid:get_pos(5)

-- Get grid size for a specific number of elements
local size = grid:get_size_for(10)

-- Get current grid borders
local borders = grid:get_borders()

-- Get all node positions
local positions = grid:get_all_pos()

-- Set custom position function
grid:set_position_function(function(node, pos)
    -- Custom positioning logic
    gui.set_position(node, pos)
end)

-- Change items per row
grid:set_in_row(4)

-- Set item size
grid:set_item_size(100, 50)

-- Sort grid nodes
grid:sort_nodes(function(a, b)
    -- Custom sorting logic
    return gui.get_id(a) < gui.get_id(b)
end)

Events

-- Subscribe to node addition
grid.on_add_item:subscribe(function(self, node)
    print("Node added to grid")
end)

-- Subscribe to node removal
grid.on_remove_item:subscribe(function(self, node)
    print("Node removed from grid")
end)

-- Subscribe to grid changes
grid.on_change_items:subscribe(function(self)
    print("Grid items changed")
end)

-- Subscribe to grid clear
grid.on_clear:subscribe(function(self)
    print("Grid cleared")
end)

-- Subscribe to position updates
grid.on_update_positions:subscribe(function(self)
    print("Grid positions updated")
end)

Notes

• The grid component calculates positions based on the size of the item prefab
• The grid's pivot point affects how items are positioned within the grid
• You can customize the grid's behavior with style settings:
  • IS_DYNAMIC_NODE_POSES: If true, always centers grid content based on the grid's pivot
  • IS_ALIGN_LAST_ROW: If true, always aligns the last row of the grid based on the grid's pivot
• The grid component does not automatically delete GUI nodes when cleared or when nodes are removed
• The grid can be used with the Scroll component to create scrollable lists
• When used with DataList, the grid can efficiently handle large collections of data