divkit/test_data/samples/base/layout_provider.json

{
  "templates": {
    "title": {
      "type": "text",
      "font_size": 20,
      "line_height": 24,
      "font_weight": "bold",
      "paddings": {
        "left": 24,
        "right": 24,
        "bottom": 16
      }
    },
    "subtitle": {
      "font_size": 15,
      "line_height": 20,
      "type": "text",
      "paddings": {
        "left": 24,
        "right": 24
      }
    },
    "block": {
      "type": "container",
      "items": [
        {
          "type": "text",
          "$text": "text",
          "font_size": 16,
          "width": {
            "type": "wrap_content"
          },
          "paddings": {
            "left": 12,
            "right": 12,
            "top": 12,
            "bottom": 12
          }
        }
      ],
      "background": [
        {
          "type": "solid",
          "$color": "background_color"
        }
      ],
      "border": {
        "corner_radius": 8
      }
    }
  },
  "card": {
    "log_id": "layout_provider_sample",
    "variables": [
      {
        "name": "block1_height",
        "type": "integer",
        "value": 0
      },
      {
        "name": "block1_width",
        "type": "integer",
        "value": 0
      },
      {
        "name": "block2_width",
        "type": "integer",
        "value": 0
      }
    ],
    "states": [
      {
        "state_id": 0,
        "div": {
          "type": "container",
          "orientation": "vertical",
          "margins": {
            "top": 24,
            "bottom": 24
          },
          "items": [
            {
              "type": "title",
              "text": "Layout Provider"
            },
            {
              "type": "subtitle",
              "text": "Layout provider allows you to get the actual size of an element and store it in variables. This is useful for creating responsive layouts where one element's size depends on another.",
              "margins": {
                "bottom": 24
              }
            },
            {
              "type": "container",
              "orientation": "vertical",
              "paddings": {
                "left": 16,
                "right": 16
              },
              "items": [
                {
                  "type": "block",
                  "background_color": "#00B341",
                  "text": "This block has wrap_content height.\nIts actual size is stored in variables.",
                  "width": {
                    "type": "fixed",
                    "value": "@{block1_height * 4}"
                  },
                  "layout_provider": {
                    "height_variable_name": "block1_height",
                    "width_variable_name": "block1_width"
                  },
                  "margins": {
                    "bottom": 16
                  }
                },
                {
                  "type": "block",
                  "background_color": "#0077FF",
                  "text": "Height = first block's height\nWidth = wrap_content",
                  "width": {
                    "type": "wrap_content"
                  },
                  "height": {
                    "type": "fixed",
                    "value": "@{block1_height}"
                  },
                  "layout_provider": {
                    "width_variable_name": "block2_width"
                  },
                  "margins": {
                    "bottom": 16
                  }
                },
                {
                  "type": "block",
                  "background_color": "#FFCC00",
                  "text": "Width = second block's width\nHeight = first block's width",
                  "width": {
                    "type": "fixed",
                    "value": "@{block2_width}"
                  },
                  "height": {
                    "type": "fixed",
                    "value": "@{block1_width}"
                  },
                  "margins": {
                    "bottom": 16
                  }
                },
                {
                  "type": "subtitle",
                  "text": "Variables:\n• block1_height = @{block1_height}\n• block1_width = @{block1_width}\n• block2_width = @{block2_width}",
                  "paddings": {
                    "left": 0,
                    "right": 0,
                    "top": 8
                  }
                }
              ]
            }
          ]
        }
      }
    ]
  }
}