TextboxHelper.ClearTextButton does not work when is applied via Trigger

[erdmenchen]

I am trying to achieve something similar to #788, but dont want to show any icon when no text is inserted.

What I've come up so far maybe exposes a bug with the TextboxHelper.ClearTextButton:

<TextBox>
<TextBox.Style>
    <Style TargetType="{x:Type TextBox}" BasedOn="{StaticResource MetroTextBox}">
          <Style.Triggers>
                <Trigger Property="metro:TextboxHelper.HasText" Value="True">
                       <Setter Property="metro:TextboxHelper.ClearTextButton" Value="True"/>
                </Trigger>
          </Style.Triggers>
    </Style>
</TextBox.Style>
</TextBox>

It works fine, the ClearTextButton is only visible, when the TextBox has Text.

But the problem is, that the ClearTextButton does not clear the TextBox any more...

When the TextboxHelper.ClearTextButton=True is set on the TextBox, then the Trigger wount work any more.

One or both of those behaviors are wrong to me...what is the solution?

[punker76]

@erdmenchen here is a working example for you (also now included in the main demo)

<TextBox Margin="0, 10, 0, 0"
            Controls:TextboxHelper.ButtonCommand="{Binding TextBoxButtonCmd, Mode=OneWay}"
            Text="Clear button">
    <TextBox.Style>
        <Style TargetType="{x:Type TextBox}"
                BasedOn="{StaticResource MetroTextBox}">
            <Setter Property="Controls:TextboxHelper.ClearTextButton" Value="True"></Setter>
            <Style.Triggers>
                <Trigger Property="Controls:TextboxHelper.HasText"
                            Value="False">
                    <Setter Property="Controls:TextboxHelper.ClearTextButton"
                            Value="False" />
                    <Setter Property="Controls:TextboxHelper.Watermark"
                            Value="Now enter some text..." />
                </Trigger>
                <Trigger Property="Controls:TextboxHelper.HasText"
                            Value="True">
                    <Setter Property="Controls:TextboxHelper.ClearTextButton"
                            Value="True" />
                </Trigger>
            </Style.Triggers>
        </Style>
    </TextBox.Style>
</TextBox>