render_metrics 1.0.1
render_metrics: ^1.0.1
render_metrics: ^1.0.2-dev.4

Flutter Android iOS web

Library for getting widget metrics. Uses RenderObject to get the size and position of widgets relative to the screen window, as well as the difference between widgets.

render_metrics #

SurfGear

pub package

A library that helps to perform actions with some periodicity

Usage of RenderMetrics #

main classes:

  1. RenderMetricsObject
  2. RenderMetricsBox
  3. RenderManager
  4. RenderParametersManager
  5. RenderData
  6. ComparisonDiff
  7. CoordsMetrics

Library for getting widget metrics. #

Allows you to get the sizes of widgets even without their explicit indication and coordinates relative to the screen.

Classes in the library #

Render classes #

RenderMetricsObject - Descendant of SingleChildRenderObjectWidget. Accepts the widget from which to get metrics.

RenderMetricsBox - descendant of RenderProxyBox. Provides metric data.

Data classes #

RenderData - class provides widget metrics data.

CoordsMetrics - coordinate point class.

ComparisonDiff - class with a difference of coordinates between two RenderData List of available values:

Managers #

RenderManager - Base class for the manager. Your own managers should inherit from it. RenderParametersManager - Ready Render Manager successor storing the RenderMetricsBox list and functionality for working with them.


Metric Data Provided #

double data: #

width - Widget width.

height - Widget height.

yTop - Top Y position relative to the screen.

yBottom - Lower Y position relative to the screen.

yCenter - Center Y position relative to the screen.

xLeft - Left X position relative to the screen.

xRight - Right X position relative to the screen.

xCenter - Center X position relative to the screen.

CoordsMetrics Instances: #

topLeft - Upper left coordinate.

topRight - Upper right coordinate.

bottomLeft - Lower left coordinate.

bottomRight - Lower right coordinate.

center - Central coordinate.

topCenter - Upper center coordinate.

bottomCenter - Lower central coordinate.

centerLeft - Center left coordinate.

centerRight - Center right coordinate.


RenderData difference data in ComparisonDiff #

yTop - Difference of the upper Y position relative to the screen.

yBottom - Difference of the lower Y position relative to the screen.

yCenter - Difference of the central Y position relative to the screen.

xLeft - Difference left X position relative to the screen.

xRight - Difference of the right X position relative to the screen.

xCenter - Difference of the central X position relative to the screen.

diffTopToBottom - Difference of the upper border.

diffBottomToTop - Difference of the lower border.

diffLeftToRight - Difference of the left border.

diffRightToLeft - Difference of the right border.

width - Difference in width of elements.

height - Difference in element heights.

topLeft - The difference between the upper left coordinates.

topRight - The difference between the upper right coordinates.

bottomLeft - The difference between the lower left coordinates.

bottomRight - The difference between the lower right coordinates.

center - The difference between the central coordinates.

topCenter - The difference between the upper center coordinates.

bottomCenter - The difference between the lower center coordinates.

centerLeft - The difference between the central left coordinates.

centerRight - The difference between the center right coordinates.

RenderParametersManager functionality #

addRenderObject - Add an instance of RenderObject.

getRenderObject - Add an instance of RenderObject by id.

getRenderData - Get an instance of RenderData with metrics. widget by id.

removeRenderObject - Remove an instance of RenderObject.

Usage: #

  1. Wrap the widget from which you want to get metrics (size, position, etc.) in [RenderMetricsObject].
  2. Pass the id. Only required when using RenderManager.
  3. onMount method - will work when creating a RenderObject. Takes in the parameters: Passed id. An instance of the RenderMetricsBox - the successor to the RenderProxyBox.
  4. The onUnMount method will work when deleting widgets from the tree. Takes in the parameters: Passed id.
  5. manager - an optional parameter. Waiting for a RenderManager descendant. [RenderParametersManager] - a ready-made descendant of the RenderManager. Allows you to get widget metrics: Position and dimensions in [RenderData] The difference between the two [RenderData] in the class instance [ComparisonDiff] You can use your heir [RenderManager].
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Publisher

surf.ru

Library for getting widget metrics. Uses RenderObject to get the size and position of widgets relative to the screen window, as well as the difference between widgets.

Repository (GitHub)
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Documentation

API reference

License

Apache 2.0 (LICENSE)

Dependencies

flutter

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