Inactive Drawing in Custom Cell

Targets iOS
1

Hi, I’m sure I’ll kick myself with the answer to this, but I was to create a custom drawing in a custom cell (let’s say it’s a square with two rounded and two right-angle sides), but I don’t want it to interfere with UI allowing the user to tap to fire the SelectionChanged event.

I think the only way yo do this is using a canvas, but I can’t stop the canvas from accepting PointerUp/Down events.

Does anyone know how to do this?

Thanks in advance

Chris

2

I don’t remember the exact name but @Jeremie_L iOSDesignExtensions have a method that allows you to disable the selection in a table. I think it’s for the entire table though if I remember that well.

If you only need to disable one line of the table, I usually use another method of Jeremie’s iOSDesignExtensions, which sets the cell’s selected color to transparent.

3

Thanks Christoph. I think you might have misunderstood me? I want the table to perform as normal (as if the canvas didn’t exist), so when you tap on it, it you can push the screen as normal

4

Sorry, I indeed misunderstood. So you have some code in the PointerDown or PointerUp events of the canvas? If not, I don’t think it should interfere with the table’s SelectionChanged event.

5

Solution 1
You could also create the custom drawing in a method and assign the resulting picture to a MobileImageViewer.

Dim cell As MobileTableCellData
cell = table.CreateCustomCell(GetTypeInfo(theCustomCell)) 

theCustomCell(cell.Control).CreateCustomDrawing // <- this is a method in your custom cell
table.AddRow(0, cell)

The downside of drawing outside of the MobileCanvas is that you need to handle the screen’s scale factor on your own.

Solution 2 (untested)
Try disabling user interaction with the canvas with this code:

Declare Sub userInteractionEnabled Lib "UIKit" Selector "setUserInteractionEnabled:" _
(obj As ptr, value As Boolean)

userInteractionEnabled(theCanvas.handle, false)
6

Thanks very much Jeremie. TheMobileImageViewer was the only solution I could come up with but I just thought there must be an easier way.

I’ll try your userInteractionEnabled suggestion and let you know if it works.

Thanks again for taking the time.

7

Nice one Jeremie! You’re untested code worked a treat. I just can’t imagine how good your tested code is :slight_smile:

Thanks again. It saved me a lot of bother

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