Adding to the book

Hi, there are some parts of the book that I think don't need a druid expert in order to write. Would it be fine to leave this issue here and track what parts need help or entire additions? I can probably add a task list.

So this is a rough task list split by chapters:

Getting Started With Druid

• Finish Application state section
• Write Handle user input section
• Write Putting it all together section

Localization

• I don't know what needs to be done here.

Command

• I also don't know what need to be done here.

Widgets in Depth

• Layout
• how constraints work
• child widgets and set_layout_rect
• paint bounds
• container widgets
• widgetpod & architecture
• commands and widgetid
• focus, active, hot, (disabled when it gets there)
• request paint & request layout
• changing widgets at runtime

More information

• Add more to the projects using druid ( There are a few new projects in #1360 )