WPF TextBox - how to stop width change with value-CodePudding

I have a problem setting my TextBox exactly as I need. I was reading similar questions here, but none of them have same requirements as me.

Basicaly I need text box with some MaxWidth to always try to fit the MaxWidth property. If user changes size of the window, it should shrink if needed, or grow up to the MaxWidth. But at the same time, I need it to be alignet to the left, to create this look:

But when I set HorizontalAlignment to "Left" - the text box change width based on inner value. When I set HorizontalAlignment to "Stretch" - then the text box is in middle of the screen, not by left side next to the buttons.

I need some combination of these two properties, but I have no idea how I should do it.

I do not use GridColumns as my layout, as there are other problems, thanks to which I am not able to create my desired result.

Here is example of my ButtonEdit - which is TextBox with buttons:

 <dxe:ButtonEdit 
        x:Name="SearchPanel"
        Margin="52,4,0,0"            
        HorizontalAlignment="Left"       
        VerticalAlignment="Top"      
        NullText="Zadejte hledaný text.."
        Height="23" MaxWidth="200" AllowDefaultButton="False"
        Grid.Row="0">
        <dxe:ButtonEdit.Buttons>
            <dxe:ButtonInfo
                ...
            </dxe:ButtonInfo>
            <dxe:ButtonInfo
                ...
            </dxe:ButtonInfo>
        </dxe:ButtonEdit.Buttons>
    </dxe:ButtonEdit>

Can someone help me please?

Thank you.

CodePudding user response：

You should be able to use the solution in https://stackoverflow.com/a/280402/19496 and wrap it in a single cell grid with a max column width.

That is, something like this:

<Grid Grid.Row="0" VerticalAlignment="Top">
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="*" MaxWidth="200"/>
    </Grid.ColumnDefinitions>    
    <dxe:ButtonEdit 
        x:Name="SearchPanel"
        Margin="52,4,0,0"
        NullText="Zadejte hledaný text.."
        Height="23" AllowDefaultButton="False">
        <dxe:ButtonEdit.Buttons>
            <dxe:ButtonInfo
                ...
            </dxe:ButtonInfo>
            <dxe:ButtonInfo
                ...
            </dxe:ButtonInfo>
        </dxe:ButtonEdit.Buttons>
    </dxe:ButtonEdit>
</Grid>

The problem is that HorizontalAlignment="Stretch" always implies centering for a control (as far as I know). Doesn't matter most of the time, except, e.g., when combined with MaxWidth.

A Grid column behaves slightly different and stays left aligned in the grid even when told to take up all available space (i.e., stretch) with Width="*".

CodePudding user response：

Ok, I managed to solve this, the trick is to calculate With in runtime using bindings. As I use DevExpress controls, this is the solution:

Width="{DXBinding '@a($Grid).ActualWidth - 50'}"

Or without DevExpress - this should work too:

{Binding Path=ActualWidth, RelativeSource={RelativeSource AncestorType=Grid}, Converter={local:WidthConverter}}