[Bug] Apply an explicit style to an Entry using TextValidationBehavior with InvalidStyle

[Cfun1]

Description

from #748

It seems impossible to apply an explicit style on an Entry which is using the InvalidStyle of TextValidationBehavior, you may say just append/add the explicit style to the InvalidStyle definition, but the issue is that the latter is only triggered upon text changed event I believe, thus the style won't be applied all the time.

Any ideas?

If I remove the Behaviors, SomeEntryStyle is applied, if I put back, only InvalidEntryStyle style will be applied when conditions met. the issue here is that SomeEntryStyle should be applied regardless.

I am not sure if I am missing something or something needs to change/improve in xct that why I have put it as a bug for now.

Steps to Reproduce

      <Entry Text="text"
                   Placeholder="palceholder"
                   Style="{StaticResource SomeEntryStyle}">
                <Entry.Behaviors>
                    <xct:EmailValidationBehavior DecorationFlags="Trim"
                                                 InvalidStyle="{StaticResource InvalidEntryStyle}"/>
                </Entry.Behaviors>
            </Entry>

    <ContentPage.Resources>
        <Style x:Key="SomeEntryStyle"
               TargetType="Entry">
            <Setter Property="TextColor" Value="White"/>
            <Setter Property="PlaceholderColor" Value="Blue"/>
            <Setter Property="BackgroundColor" Value="Purple"/>
            <Setter Property="Visual" Value="Material"/>
        </Style>

        <Style x:Key="InvalidEntryStyle"
               TargetType="Entry">
            <Setter Property="TextColor" Value="Red"/>
        </Style>
    </ContentPage.Resources>

Basic Information

• Version with issue: 1.0.2
• Last known good version: -
• IDE: vs2019
• Platform Target Frameworks: All

[AndreiMisiukevich]

Hi
The problem is that InvalidStyle overrides Style, right?

you can set Valid style instead of setting Style property

[Cfun1]

@AndreiMisiukevich it will not work because only one style will be applied at a time either valid or invalid.
In my example I want that PlaceholderColor, BackgroundColor and Visual properties are always applied from SomeEntryStyle weather is it valid or no.

It will be nice if invalidstyle will only override concerned properties (in example TextColor) not overwrite the whole style. A solution would be to define styles like this (but it is duplicate and ugly):

        <Style x:Key="InvalidEntryStyle"
               TargetType="Entry">
            <Setter Property="TextColor" Value="Red"/>
            <Setter Property="PlaceholderColor" Value="Blue"/>
            <Setter Property="BackgroundColor" Value="Purple"/>
            <Setter Property="Visual" Value="Material"/>
        </Style>

        <Style x:Key="ValidEntryStyle"
               TargetType="Entry">
            <Setter Property="TextColor" Value="White"/>
            <Setter Property="PlaceholderColor" Value="Blue"/>
            <Setter Property="BackgroundColor" Value="Purple"/>
            <Setter Property="Visual" Value="Material"/>
        </Style>

      <Entry Text="text"
                   Placeholder="palceholder">
                <Entry.Behaviors>
                    <xct:EmailValidationBehavior DecorationFlags="Trim"
                                                 InvalidStyle="{StaticResource InvalidEntryStyle}"
                                                 ValidStyle="{StaticResource ValidEntryStyle}"/>
                </Entry.Behaviors>
            </Entry>

[Cfun1]

@AndreiMisiukevich is this to be considered as a verified bug or an enhacement ?

[AndreiMisiukevich]

@AndreiMisiukevich is this to be considered as a verified bug or an enhacement ?

Actually, I am not sure that such behavior can be implemented at all...

[Cfun1]

@AndreiMisiukevich I believe the VSM approach will be a solution to this issue.

[Cfun1]

Closed in #955