Dynamic expanding multi-level menus

As users have become accustomed in many applications, top menus with context-sensitive sub-menus are the norm, but are not part of the standard Power Apps “suite”, so creating this type of function is a useful enhancement to user experience using a “look and feel” familiar to them.
Firstly, the App and the Excel file (which is already imported) can be downloaded here. 
I will start this a bit backwards, showing the end result of a three-level menu based on a list as below and then discuss what needs to be done to accomplish this.

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Slide Show Into Screen

This image show can be used on any screen, but would be good as a company intro when the app is opened.

The example above has three images, but as many as required can be loaded. What is going on is fairly simple.

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Alternate shading in Galleries

One of the things that improves the presentation of an app and the readability of a gallery is if “every other” line was able to be shaded. There is no built-in function for this in Power Apps, but it can be done quote easily.

The first thing you need to do is “number” the entries of the gallery. As you also may be sorting and filtering the gallery during the operation of app, this numbering needs to be dynamic to the gallery contents as it changes.

The following is an example of a gallery with two filters based on a list, however it could be any sort and/or filtered gallery. 

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The rogue wrap-around

When you are designing a (particularly larger) form with a lot of fields and have many card widths different to the standard “equal width” automatically set by Power Apps, you get a long way in, change a card width and suddenly the whole screen of cards rearranges itself to something quite different than the items per line you planned? Sometimes this is a nightmare to fix (you fix one line and another breaks). So how do you avoid (or more accurately) mitigate the effect?

Firstly, frequently you will have a need for different numbers of cards per line and within this naturally different card widths. You may also have a need for the widths of all the cards on the particular line to equal the form width.

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Duplicating a Canvas App Form into SharePoint Integration

You have just finished your Canvas app and now you would like users to also have the facility directly from the SharePoint list. You already have the form in the Canvas App set out the way you want, and now need to duplicate this on SharePoint

This is a perceived barrier that really is not one. A lot of people envisage having to maintain two apps or go for the integration option and have to manage the limitations this brings. Any form created in a stand-alone app (SA) can be directly copied and pasted into a SharePoint Integration (SPI) screen doing the following: –

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Using Variables when you change the standard design

You do not like the color scheme, font and sizes that Power Apps provides as “standard”. The Themes also do not exactly meet your needs. If you are going to make changes to the design, I recommend you go the extra effort and capture all of this at App OnStart in Variables.

To explain, I generally use a colour scheme around a base colour (generally a dark one) with various shades of ColorFade on different elements. If you set this base color as a Variable (as well as the more commonly used lighter ones), you simply refer to these in the elements of all the controls.

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