Windows Phone 7中帶題頭的TextBox和PasswordBox

之前在做豆瓣電臺的時候想實現一個登入介面，起初是把TextBlock和TextBox放在一起（效果如下），但是這樣實現出來的效果既浪費空間，又不美觀。

因為之前寫WPF對自定義控制元件有一些基礎，所以就對TextBox和Password的Template做了些手腳，讓題頭融合到控制元件裡。這樣既美觀又節省空間，同時還可以保證不會推動系統控制元件風格和功能，如下圖：

實現上面的效果非常簡單，只需要在Blend中建立一個新的TextBox，然後右鍵-Edit Template-Edit a Copy。在彈出的對話方塊中的Name設定一個名字，如“LabelTextBox”，然後在Define in中選擇Application以在整個程式範圍內都可以使用它。

操作完這些以後Blend會自動在App.xaml裡建立一個新的Style資源，我們在裡面搜尋一下ContentControl，這就是TextBox中顯示文字的元素了。剩下的就是對這個元素進行改造，如調整位置，新增新元素等等。下面是我寫的TextBox和PasswordBox的資源：

        <ControlTemplate x:Key="PhoneDisabledTextBoxTemplate" TargetType="TextBox">

            <ContentControl x:Name="ContentElement" BorderThickness="0" HorizontalContentAlignment="Stretch" Margin="{StaticResource PhoneTextBoxInnerMargin}" Padding="{TemplateBinding Padding}" VerticalContentAlignment="Stretch"/>

        </ControlTemplate>

        <Style x:Key="LabelTextBox" TargetType="TextBox">

            <Setter Property="FontFamily" Value="{StaticResource PhoneFontFamilyNormal}"/>

            <Setter Property="FontSize" Value="{StaticResource PhoneFontSizeMediumLarge}"/>

            <Setter Property="Background" Value="{StaticResource PhoneTextBoxBrush}"/>

            <Setter Property="Foreground" Value="{StaticResource PhoneTextBoxForegroundBrush}"/>

            <Setter Property="BorderBrush" Value="{StaticResource PhoneTextBoxBrush}"/>

            <Setter Property="SelectionBackground" Value="{StaticResource PhoneAccentBrush}"/>

            <Setter Property="SelectionForeground" Value="{StaticResource PhoneTextBoxSelectionForegroundBrush}"/>

            <Setter Property="BorderThickness" Value="{StaticResource PhoneBorderThickness}"/>

            <Setter Property="Padding" Value="2"/>

            <Setter Property="Template">

                <Setter.Value>

                    <ControlTemplate TargetType="TextBox">

                        <Grid Background="Transparent">

                            <VisualStateManager.VisualStateGroups>

                                <VisualStateGroup x:Name="CommonStates">

                                    <VisualState x:Name="Normal"/>

                                    <VisualState x:Name="MouseOver"/>

                                    <VisualState x:Name="Disabled">

                                        <Storyboard>

                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility" Storyboard.TargetName="EnabledBorder">

                                                <DiscreteObjectKeyFrame KeyTime="0">

                                                    <DiscreteObjectKeyFrame.Value>

                                                        <Visibility>Collapsed</Visibility>

                                                    </DiscreteObjectKeyFrame.Value>

                                                </DiscreteObjectKeyFrame>

                                            </ObjectAnimationUsingKeyFrames>

                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility" Storyboard.TargetName="DisabledOrReadonlyBorder">

                                                <DiscreteObjectKeyFrame KeyTime="0">

                                                    <DiscreteObjectKeyFrame.Value>

                                                        <Visibility>Visible</Visibility>

                                                    </DiscreteObjectKeyFrame.Value>

                                                </DiscreteObjectKeyFrame>

                                            </ObjectAnimationUsingKeyFrames>

                                        </Storyboard>

                                    </VisualState>

                                    <VisualState x:Name="ReadOnly">

                                        <Storyboard>

                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility" Storyboard.TargetName="EnabledBorder">

                                                <DiscreteObjectKeyFrame KeyTime="0">

                                                    <DiscreteObjectKeyFrame.Value>

                                                        <Visibility>Collapsed</Visibility>

                                                    </DiscreteObjectKeyFrame.Value>

                                                </DiscreteObjectKeyFrame>

                                            </ObjectAnimationUsingKeyFrames>

                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility" Storyboard.TargetName="DisabledOrReadonlyBorder">

                                                <DiscreteObjectKeyFrame KeyTime="0">

                                                    <DiscreteObjectKeyFrame.Value>

                                                        <Visibility>Visible</Visibility>

                                                    </DiscreteObjectKeyFrame.Value>

                                                </DiscreteObjectKeyFrame>

                                            </ObjectAnimationUsingKeyFrames>

                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="DisabledOrReadonlyBorder">

                                                <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PhoneTextBoxBrush}"/>

                                            </ObjectAnimationUsingKeyFrames>

                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush" Storyboard.TargetName="DisabledOrReadonlyBorder">

                                                <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PhoneTextBoxBrush}"/>

                                            </ObjectAnimationUsingKeyFrames>

                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="DisabledOrReadonlyContent">

                                                <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PhoneTextBoxReadOnlyBrush}"/>

                                            </ObjectAnimationUsingKeyFrames>

                                        </Storyboard>

                                    </VisualState>

                                </VisualStateGroup>

                                <VisualStateGroup x:Name="FocusStates">

                                    <VisualState x:Name="Focused">

                                        <Storyboard>

                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="EnabledBorder">

                                                <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PhoneTextBoxEditBackgroundBrush}"/>

                                            </ObjectAnimationUsingKeyFrames>

                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush" Storyboard.TargetName="EnabledBorder">

                                                <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PhoneTextBoxEditBorderBrush}"/>

                                            </ObjectAnimationUsingKeyFrames>

                                        </Storyboard>

                                    </VisualState>

                                    <VisualState x:Name="Unfocused"/>

                                </VisualStateGroup>

                            </VisualStateManager.VisualStateGroups>

                            <Border x:Name="EnabledBorder" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Margin="{StaticResource PhoneTouchTargetOverhang}">

                                <Grid>

                                    <Grid.ColumnDefinitions>

                                        <ColumnDefinition Width="Auto" />

                                        <ColumnDefinition Width="*" />

                                    </Grid.ColumnDefinitions>

                                    <TextBlock Grid.Column="0" Margin="10, 0" Text="{TemplateBinding Tag}" VerticalAlignment="Center" />

                                    <ContentControl Grid.Column="1" x:Name="ContentElement" BorderThickness="0" HorizontalContentAlignment="Stretch" Margin="1,2,1,2" Padding="{TemplateBinding Padding}" VerticalContentAlignment="Stretch" VerticalAlignment="Center"/>

                                </Grid>

                            </Border>

                            <Border x:Name="DisabledOrReadonlyBorder" BorderBrush="{StaticResource PhoneDisabledBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="Transparent" Margin="{StaticResource PhoneTouchTargetOverhang}" Visibility="Collapsed">

                                <Grid>

                                    <Grid.ColumnDefinitions>

                                        <ColumnDefinition Width="Auto" />

                                        <ColumnDefinition Width="*" />

                                    </Grid.ColumnDefinitions>

                                    <TextBlock Grid.Column="0" Margin="10, 0" Text="{TemplateBinding Tag}" VerticalAlignment="Center" Foreground="{StaticResource PhoneDisabledBrush}" FontWeight="{TemplateBinding FontWeight}" FontStyle="{TemplateBinding FontStyle}" FontSize="{TemplateBinding FontSize}" FontFamily="{TemplateBinding FontFamily}" />

                                    <TextBox Grid.Column="1" x:Name="DisabledOrReadonlyContent" Background="Transparent" Foreground="{StaticResource PhoneDisabledBrush}" FontWeight="{TemplateBinding FontWeight}" FontStyle="{TemplateBinding FontStyle}" FontSize="{TemplateBinding FontSize}" FontFamily="{TemplateBinding FontFamily}" IsReadOnly="True" SelectionForeground="{TemplateBinding SelectionForeground}" SelectionBackground="{TemplateBinding SelectionBackground}" TextAlignment="{TemplateBinding TextAlignment}" TextWrapping="{TemplateBinding TextWrapping}" Text="{TemplateBinding Text}" Template="{StaticResource PhoneDisabledTextBoxTemplate}"/>

                                </Grid>

                            </Border>

                        </Grid>

                    </ControlTemplate>

                </Setter.Value>

            </Setter>

        </Style>

        <ControlTemplate x:Key="PhoneDisabledPasswordBoxTemplate" TargetType="PasswordBox">

            <Border x:Name="ContentElement" BorderThickness="0" Margin="{StaticResource PhonePasswordBoxInnerMargin}" Padding="{TemplateBinding Padding}"/>

        </ControlTemplate>

        <Style x:Key="LabelPassword" TargetType="PasswordBox">

            <Setter Property="FontFamily" Value="{StaticResource PhoneFontFamilyNormal}"/>

            <Setter Property="FontSize" Value="{StaticResource PhoneFontSizeMediumLarge}"/>

            <Setter Property="Background" Value="{StaticResource PhoneTextBoxBrush}"/>

            <Setter Property="Foreground" Value="{StaticResource PhoneTextBoxForegroundBrush}"/>

            <Setter Property="BorderBrush" Value="{StaticResource PhoneTextBoxBrush}"/>

            <Setter Property="BorderThickness" Value="{StaticResource PhoneBorderThickness}"/>

            <Setter Property="SelectionBackground" Value="{StaticResource PhoneAccentBrush}"/>

            <Setter Property="SelectionForeground" Value="{StaticResource PhoneContrastBackgroundBrush}"/>

            <Setter Property="Padding" Value="2"/>

            <Setter Property="Template">

                <Setter.Value>

                    <ControlTemplate TargetType="PasswordBox">

                        <Grid Background="Transparent">

                            <VisualStateManager.VisualStateGroups>

                                <VisualStateGroup x:Name="CommonStates">

                                    <VisualState x:Name="Normal"/>

                                    <VisualState x:Name="MouseOver"/>

                                    <VisualState x:Name="Disabled">

                                        <Storyboard>

                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility" Storyboard.TargetName="EnabledBorder">

                                                <DiscreteObjectKeyFrame KeyTime="0">

                                                    <DiscreteObjectKeyFrame.Value>

                                                        <Visibility>Collapsed</Visibility>

                                                    </DiscreteObjectKeyFrame.Value>

                                                </DiscreteObjectKeyFrame>

                                            </ObjectAnimationUsingKeyFrames>

                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility" Storyboard.TargetName="DisabledBorder">

                                                <DiscreteObjectKeyFrame KeyTime="0">

                                                    <DiscreteObjectKeyFrame.Value>

                                                        <Visibility>Visible</Visibility>

                                                    </DiscreteObjectKeyFrame.Value>

                                                </DiscreteObjectKeyFrame>

                                            </ObjectAnimationUsingKeyFrames>

                                        </Storyboard>

                                    </VisualState>

                                </VisualStateGroup>

                                <VisualStateGroup x:Name="FocusStates">

                                    <VisualState x:Name="Focused">

                                        <Storyboard>

                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="EnabledBorder">

                                                <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PhoneTextBoxEditBackgroundBrush}"/>

                                            </ObjectAnimationUsingKeyFrames>

                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush" Storyboard.TargetName="EnabledBorder">

                                                <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PhoneTextBoxEditBorderBrush}"/>

                                            </ObjectAnimationUsingKeyFrames>

                                        </Storyboard>

                                    </VisualState>

                                    <VisualState x:Name="Unfocused"/>

                                </VisualStateGroup>

                            </VisualStateManager.VisualStateGroups>

                            <Border x:Name="EnabledBorder" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Margin="{StaticResource PhoneTouchTargetOverhang}">

                                <Grid>

                                    <Grid.ColumnDefinitions>

                                        <ColumnDefinition Width="Auto" />

                                        <ColumnDefinition Width="*" />

                                    </Grid.ColumnDefinitions>

                                    <TextBlock Grid.Column="0" Margin="10, 0" Text="{TemplateBinding Tag}" VerticalAlignment="Center" />

                                    <Border Grid.Column="1" x:Name="ContentElement" BorderThickness="0" Margin="{StaticResource PhonePasswordBoxInnerMargin}" Padding="{TemplateBinding Padding}"/>

                                </Grid>

                            </Border>

                            <Border x:Name="DisabledBorder" BorderBrush="{StaticResource PhoneDisabledBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="Transparent" Margin="{StaticResource PhoneTouchTargetOverhang}" Visibility="Collapsed">

                                <Grid>

                                    <Grid.ColumnDefinitions>

                                        <ColumnDefinition Width="Auto" />

                                        <ColumnDefinition Width="*" />

                                    </Grid.ColumnDefinitions>

                                    <TextBlock Grid.Column="0" Margin="10, 0" Text="{TemplateBinding Tag}" VerticalAlignment="Center" Foreground="{StaticResource PhoneDisabledBrush}" FontWeight="{TemplateBinding FontWeight}" FontStyle="{TemplateBinding FontStyle}" FontSize="{TemplateBinding FontSize}" FontFamily="{TemplateBinding FontFamily}" />

                                    <PasswordBox Grid.Column="1" x:Name="DisabledContent" Background="Transparent" Foreground="{StaticResource PhoneDisabledBrush}" Password="{TemplateBinding Password}" PasswordChar="{TemplateBinding PasswordChar}" Template="{StaticResource PhoneDisabledPasswordBoxTemplate}"/>

                                </Grid>

                            </Border>

                        </Grid>

                    </ControlTemplate>

                </Setter.Value>

            </Setter>

        </Style>

Ok，樣式設定完畢，要使用的時候就非常簡單了，在專案裡的任何一個TextBox或者PasswordBox中像這樣使用它就可以了：

<TextBox Tag="帳號：" Style="{StaticResource LabelTextBox}" Name="Username" />

<PasswordBox Tag="密碼：" Style="{StaticResource LabelPassword}" Name="Password" />

其中Tag是控制元件前面題頭裡的文字，而TextBox和PasswordBox的功能不會受到任何影響~