Define new ControlTemplate keeping the original events

Question

I want to use the ExtendedWPFToolkits's ColorPicker but with a custom ButtonStyle. I can create a new look overriding the Template property of the item but the original templates click event is missing.

I want to keep it, but how?

<Controls:ColorPicker >
    <Controls:ColorPicker.ButtonStyle>
        <Style TargetType="{x:Type ToggleButton}">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate>
                        <Button Content="ColorPicker"></Button>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Controls:ColorPicker.ButtonStyle>
</Controls:ColorPicker>

Answer 1

What you have is not valid. You are putting a Button in the ControlTemplate of a ToggleButton, so basically a button in a button.

You'd need to do something like:

<Controls:ColorPicker >
    <Controls:ColorPicker.ButtonStyle>
        <Style TargetType="{x:Type ToggleButton}">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate>
                        <Border Background="Transparent">
                            <TextBlock Text="ColorPicker" />
                        </Border>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Controls:ColorPicker.ButtonStyle>
</Controls:ColorPicker>

I added a transparent Border so the button will be able to receive mouse events for areas not covered by the text.