Fix Regression with iOS button resizing with text or image change #25122
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Yes thanks! I believe this is a rounding issue and have pushed a hopeful improvement |
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I was a little confused about this image, but testing on main, this also fails in the same pixel off way as here. I think this is okay
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| // _isFirstMeasure is a flag to make sure we manually recalculate the titleRect when there are dynamic changes to the button. | ||
| // There are times the platformButton.TitleLabel is updated on dynamic changes and reacts to the change by truncating the label when we actually | ||
| // have space in our constraints. We provide the space to be used in our first measure of the titleRect and then use the newly laid out titleRect in later iterations. | ||
| bool _isFirstMeasure = true; | ||
| internal bool _isFirstMeasure = true; |
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Instead of making this internal can we add a method that gets called?
ResetToFirstMeasureOfNewContent()
Or something of that nature?
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@tj-devel709 The image in the last button (Button 2) has moved a few pixel from the center to the right. Its no longer centered.
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Yes this is true. The way it was working prior to this PR worked pretty well when we would create a button, but it had some regressions with things on the button changing dynamically such as the text changing. It also led to some inconsistent behavior. The changes in this PR try to manually measure the title of the button when laying it out instead of using the UIButton.TitleLabel.Bounds since that UIButton.TitleLabel.Bounds is not updated right away when these dynamic changes happen. In .NET8 SR8 and before, it also used this same manually measure process but there are a few more optimizations now that will get the measuring and alignment a lot closer in most cases. There will be a few cases where the image may be a pixel off (particularly when the image is on top or bottom of the text of the button) and this will be corrected in the future.
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/backport to 8.0.1xx-sr9 |
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Started backporting to 8.0.1xx-sr9: https://github.com/dotnet/maui/actions/runs/11298662578 |
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/backport to 8.0.1xx-sr9 |
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Started backporting to 8.0.1xx-sr9: https://github.com/dotnet/maui/actions/runs/11298681931 |
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Manually backported here to SR9 here: #25214 |
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Description of Change
This PR fixes a regression with iOS buttons re-updating the size of the button when the text changes. There was some code that was trying to use the UIButton.TitleLabel.Bounds for sizing, but there are times the TitleLabel is still set to the old title. This PR also allows changes to the button size when the image is changed.
Issues Fixed
Fixes #25074
Small demo showing changing text and images triggers a resize when needed. The small jump in animation was already there and is not new to this PR.
Screen.Recording.2024-10-07.at.4.01.35.PM.mov