Using a styles Scrollbar for TextBox

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Hello,

I want to style a vertical scrollbar for my textbox.

I am NOT allowed to add/use a style that is automatically used for all textboxes,
or scrollviewers, because I am not allowed to override anything common.

So I need a style with a key/name I can use for each textbox (or not).

Here my XAML code for styling the textbox:

HTML

<Style x:Key="PortalTextBox" TargetType="{x:Type TextBox}">
    <setter property="OverridesDefaultStyle" value="true" />
    <setter property="AllowDrop" value="true" />
    <setter property="MinWidth" value="0" />
    <setter property="MinHeight" value="0" />
    <setter property="FocusVisualStyle" value="{x:Null}" />
    <setter property="Template">
        <setter.value>
            <controltemplate targettype="{x:Type TextBox}">
                <!--<scrollviewer focusable="false" removed="Transparent" x:name="PART_ContentHost" horizontalscrollbarvisibility="Hidden" verticalscrollbarvisibility="Hidden" style="{StaticResource {ComponentResourceKey ResourceId=PortalScrollViewer, TypeInTargetAssembly=SiControls:SiCResourceKeys}}" xmlns:x="#unknown" />-->
                <!--<scrollcontentpresenter x:name="PART_ScrollContentPresenter" cancontentscroll="{TemplateBinding CanContentScroll}" canhorizontallyscroll="False" canverticallyscroll="False" contenttemplate="{TemplateBinding ContentTemplate}" content="{TemplateBinding Content}" grid.column="0" margin="{TemplateBinding Padding}" grid.row="0" xmlns:x="#unknown" />-->
                <scrollbar x:name="PART_VerticalScrollBar" automationproperties.automationid="VerticalScrollBar" cursor="Arrow" grid.column="1" minimum="0" grid.row="0" visibility="{TemplateBinding VerticalScrollBarVisibility}" value="{Binding VerticalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}" viewportsize="{TemplateBinding ActualHeight}" style="{StaticResource {ComponentResourceKey ResourceId=PortalVerticalScrollBarStyle, TypeInTargetAssembly=SiControls:SiCResourceKeys}}" xmlns:x="#unknown" />
            </controltemplate>
        </setter.value>
    </setter>
</Style>

I have already Styles for PortalVerticalScrollBarStyle and PortalHorizontalScrollBarStyle which are working (on a ScrollViewer).

I try to style the Textbox then:

HTML

<textbox x:name="txtAdditionalInstructions" horizontalalignment="Stretch" verticalalignment="Stretch" uselayoutrounding="True" fontsize="16" text="{Binding CurrentOrder.AdditionalInstructions, ElementName=AddExtraInformation}" height="322" acceptsreturn="True" acceptstab="True" margin="4,0,0,0" borderthickness="0" horizontalscrollbarvisibility="Hidden" verticalscrollbarvisibility="Auto" width="316" textwrapping="Wrap" style="{DynamicResource {ComponentResourceKey ResourceId=PortalTextBox, TypeInTargetAssembly=SiControls:SiCResourceKeys}}" xmlns:x="#unknown"></textbox>

But somehow it is not working.
I am also not sure for the texbox how the PART_Scroll.. stuff must look like.
Any idea what I am doing wrong? Thanks a lot!

Posted 28-Jul-11 23:36pm

EriBeh

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EriBeh 29-Jul-11 5:56am

Some additional info:

I can see my styled scrollbar in the textbox, the bindings are working.

But it is somehow wrong, it appears in the middle and is not scrolling.

So the error is in the Textbox style, somewhere at the "PART"... stuff,
I don't know how to use that exactly.

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EriBeh · Answer 1 · 2011-07-29T01:08:00

Solution:

XML

<Style x:Key="PortalTextBox" TargetType="{x:Type TextBox}">
    <Setter Property="OverridesDefaultStyle" Value="true"/>
    <Setter Property="AllowDrop" Value="true"/>
    <Setter Property="MinWidth" Value="0"/>
    <Setter Property="MinHeight" Value="0"/>
    <Setter Property="FocusVisualStyle" Value="{x:Null}"/>
    <Setter Property="Template">
        <Setter.Value>
                <ControlTemplate TargetType="{x:Type TextBox}">
                    <Microsoft_Windows_Themes:ListBoxChrome x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" RenderMouseOver="{TemplateBinding IsMouseOver}" RenderFocused="{TemplateBinding IsKeyboardFocusWithin}" SnapsToDevicePixels="true">
                    <ScrollViewer x:Name="PART_ContentHost" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" Style="{StaticResource {ComponentResourceKey ResourceId=PortalScrollViewer, TypeInTargetAssembly=SiControls:SiCResourceKeys}}"/>
                </Microsoft_Windows_Themes:ListBoxChrome>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsEnabled" Value="false">
                            <Setter Property="Background" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}"/>
                            <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>

        </Setter.Value>
    </Setter>
</Style>