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Positioning Components on Render Relative to Unknown Size of Other Components

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I'm developing a Node JS App using Electron and rendering the UI using React.
Simply, the user enters print commands in a word-processor component on the left side of the UI, and React interperets those commands and renders the content connected to those commands in real-time on the right side of the UI.
For example, Render Text "X" at coordinates X1, Y1. Rendering this kind of command is simple to do by triggering a change in state when the user enters a new command, and updating the rendered view of the command with a draw(). However, I am having difficulty deciding the best way to handle a problem senario when (1) the command coordinate given is not absolute but instead is relative to a prior command rendered component, and (2) the relational component does not have a known size that can be determined without rendering it first (usually it contains text with various fonts and font-sizes and varying character content). I'm trying to figure out the best way to implement the draw() calls in a way that will get me an accurately rendered image without unnecessary additional draw commands for both the statically positioned and dynamically positioned components.

I have thought about inserting the unknown relational components directly into the DOM with javascript, finding the size and saving it for the render, then hiding/removing them, but realize that this is poor practice when using React because obfuscates the true state of the DOM.
I googled this problem, and found this topic on StackOverflow (Get the height of a Component in React) which discusses using the ref variable as a callback to re-render the UI once the size is known. However, I wasn't sure if this solution was out-dated (this post is 3 years old), or if this was a practical solution for my use case since the rendered view on the right side is constantly changing as the user enters input on the command side of the UI instead of rendered a single time on page load.

I'm relatively new to React, and hope that I'm not overlooking a simple answer in my ignorance. Any insights into the theory of how to approach and deal with this problem would be much appreciated!

html reactjs

share|improve this question

asked Mar 22 at 18:41

ChrisChris

798

add a comment | 

0

I'm developing a Node JS App using Electron and rendering the UI using React.
Simply, the user enters print commands in a word-processor component on the left side of the UI, and React interperets those commands and renders the content connected to those commands in real-time on the right side of the UI.
For example, Render Text "X" at coordinates X1, Y1. Rendering this kind of command is simple to do by triggering a change in state when the user enters a new command, and updating the rendered view of the command with a draw(). However, I am having difficulty deciding the best way to handle a problem senario when (1) the command coordinate given is not absolute but instead is relative to a prior command rendered component, and (2) the relational component does not have a known size that can be determined without rendering it first (usually it contains text with various fonts and font-sizes and varying character content). I'm trying to figure out the best way to implement the draw() calls in a way that will get me an accurately rendered image without unnecessary additional draw commands for both the statically positioned and dynamically positioned components.

I have thought about inserting the unknown relational components directly into the DOM with javascript, finding the size and saving it for the render, then hiding/removing them, but realize that this is poor practice when using React because obfuscates the true state of the DOM.
I googled this problem, and found this topic on StackOverflow (Get the height of a Component in React) which discusses using the ref variable as a callback to re-render the UI once the size is known. However, I wasn't sure if this solution was out-dated (this post is 3 years old), or if this was a practical solution for my use case since the rendered view on the right side is constantly changing as the user enters input on the command side of the UI instead of rendered a single time on page load.

I'm relatively new to React, and hope that I'm not overlooking a simple answer in my ignorance. Any insights into the theory of how to approach and deal with this problem would be much appreciated!

html reactjs

share|improve this question

asked Mar 22 at 18:41

ChrisChris

798

add a comment | 

I'm developing a Node JS App using Electron and rendering the UI using React.
Simply, the user enters print commands in a word-processor component on the left side of the UI, and React interperets those commands and renders the content connected to those commands in real-time on the right side of the UI.
For example, Render Text "X" at coordinates X1, Y1. Rendering this kind of command is simple to do by triggering a change in state when the user enters a new command, and updating the rendered view of the command with a draw(). However, I am having difficulty deciding the best way to handle a problem senario when (1) the command coordinate given is not absolute but instead is relative to a prior command rendered component, and (2) the relational component does not have a known size that can be determined without rendering it first (usually it contains text with various fonts and font-sizes and varying character content). I'm trying to figure out the best way to implement the draw() calls in a way that will get me an accurately rendered image without unnecessary additional draw commands for both the statically positioned and dynamically positioned components.

I have thought about inserting the unknown relational components directly into the DOM with javascript, finding the size and saving it for the render, then hiding/removing them, but realize that this is poor practice when using React because obfuscates the true state of the DOM.
I googled this problem, and found this topic on StackOverflow (Get the height of a Component in React) which discusses using the ref variable as a callback to re-render the UI once the size is known. However, I wasn't sure if this solution was out-dated (this post is 3 years old), or if this was a practical solution for my use case since the rendered view on the right side is constantly changing as the user enters input on the command side of the UI instead of rendered a single time on page load.

I'm relatively new to React, and hope that I'm not overlooking a simple answer in my ignorance. Any insights into the theory of how to approach and deal with this problem would be much appreciated!

html reactjs

share|improve this question

asked Mar 22 at 18:41

ChrisChris

798

share|improve this question

asked Mar 22 at 18:41

ChrisChris

798

share|improve this question

asked Mar 22 at 18:41

ChrisChris

798

asked Mar 22 at 18:41

ChrisChris

798

asked Mar 22 at 18:41

ChrisChris

798