wpf日历控件制作过程分析(1)---定义header

希望通过分析能更好的理解wpf控件的开发

<PathGeometry x:Key="geometry" Figures="M0,0 4.5,4 9,0 5.5,0 4.5,1 3.5,0z"/>

2.定义4个不同状态下的笔刷(可自由发挥)

<LinearGradientBrush x:Key="MonthCalendarButtonFillNormal" StartPoint="0,0" EndPoint="1,1">

<LinearGradientBrush.GradientStops>

<GradientStop Color="#FFE1EAFE" Offset="0"/>

<GradientStop Color="#FFC3D3FD" Offset="0.3"/>

<GradientStop Color="#FFC3D3FD" Offset="0.6"/>

<GradientStop Color="#FFBBCDF9" Offset="1"/>

</LinearGradientBrush.GradientStops>

</LinearGradientBrush>

<LinearGradientBrush x:Key="MonthCalendarButtonFillHover" StartPoint="0, 0" EndPoint="1, 1">

<LinearGradientBrush.GradientStops>

<GradientStop Color="#FFD6E7FF" Offset="0"/>

<GradientStop Color="#FFD6E7FF" Offset="0.6"/>

<GradientStop Color="#FFB9DAFB" Offset="1"/>

</LinearGradientBrush.GradientStops>

</LinearGradientBrush>

<LinearGradientBrush x:Key="MonthCalendarButtonFillPressed" StartPoint="0, 0" EndPoint="1, 1">

<LinearGradientBrush.GradientStops>

<GradientStop Color="#FF93A8D9" Offset="0"/>

<GradientStop Color="#FFA5BDFB" Offset="0.3"/>

<GradientStop Color="#FFA5BDFB" Offset="0.7"/>

<GradientStop Color="#FFD2DEEB" Offset="1.0"/>

</LinearGradientBrush.GradientStops>

</LinearGradientBrush>

<LinearGradientBrush x:Key="MonthCalendarButtonFillDisabled" StartPoint="0, 0" EndPoint="1, 1">

<LinearGradientBrush.GradientStops>

<GradientStop Color="#FFF7F7F7" Offset="0"/>

<GradientStop Color="#FFF0F0F0" Offset="0.3"/>

<GradientStop Color="#FFECECEC" Offset="0.6"/>

<GradientStop Color="#FFE3E3E3" Offset="1.0"/>

</LinearGradientBrush.GradientStops>

</LinearGradientBrush>

3.定义按钮样式,按钮上再使用上面的笔刷

<Style x:Key="{ComponentResourceKey TypeInTargetAssembly={x:Type DateControls:MonthCalendar},ResourceId=PreviousButtonStyleKey}" TargetType="{x:Type ButtonBase}">

<Setter Property="Width" Value="16" />

<Setter Property="Height" Value="16" />

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

<Setter Property="Foreground" Value="#FF4D6185"/>

<Setter Property="Focusable" Value="false"/>

<Setter Property="VerticalAlignment" Value="Top"/>

</Style>

<Style x:Key="{ComponentResourceKey TypeInTargetAssembly={x:Type DateControls:MonthCalendar},ResourceId=NextButtonStyleKey}" TargetType="{x:Type ButtonBase}">

<Setter Property="Width" Value="16" />

<Setter Property="Height" Value="16" />

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

<Setter Property="Foreground" Value="#FF4D6185"/>

<Setter Property="Focusable" Value="false"/>

<Setter Property="VerticalAlignment" Value="Top"/>

</Style>

注意点

1.这里的TargetType是ButtonBase,因为有可能按钮是Button或RepeatButton都有可能,这里指向为ButtonBase是一种通用的做法

2.为何不直接定义还要为Button定义样式?,这里提供的样式为默认样式(下面我们会讲到)

3.ComponentResourceKey将资源定义在指定程序集中,在后端访问的方法如下

FindResource(new ComponentResourceKey(typeof(MonthCalendar), "PreviousButtonStyleKey")) as Style;

4.定义Title类,在静态构造函数中用OverrideMetadata方法重写样式(多数控件都需要这么做)

static MonthCalendarTitle()

<Style x:Key="{x:Type DateControls:MonthCalendarTitle}" TargetType="{x:Type DateControls:MonthCalendarTitle}">

<Setter Property="Background" Value="Blue"/>

<Setter Property="Foreground" Value="White"/>

<Setter Property="FontWeight" Value="Bold"/>

<Setter Property="Padding" Value="8"/>

<Setter Property="Focusable" Value="false"/>

<Setter Property="HorizontalContentAlignment" Value="Center"/>

<Setter Property="VerticalContentAlignment" Value="Center"/>

<Setter Property="Template">

<Setter.Value>

<ControlTemplate TargetType="{x:Type DateControls:MonthCalendarTitle}">

<Border Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}">

<TextBlock [b]Text="{Binding Converter={StaticResource MonthCalendarMonthYearHeaderConverter}}"[/b] FontFamily="{TemplateBinding FontFamily}" FontSize="{TemplateBinding FontSize}" FontStretch="{TemplateBinding FontStretch}" FontStyle="{TemplateBinding FontStyle}" FontWeight="{TemplateBinding FontWeight}"

HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"

Margin="{TemplateBinding Padding}" Foreground="{TemplateBinding Foreground}"/>

</Border>

</ControlTemplate>

</Setter.Value>

</Setter>

<Style.Triggers>

<Trigger Property="IsEnabled" Value="false">

<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>

</Trigger>

</Style.Triggers>

</Style>

注意上面黑字,这里使用了数据绑定的类型转换器,只要给这个控件指定数据源就可以了,其作用是把日期转换上面第二张截图的格式

5.整合header

<!--header beginer-->

<Grid x:Name="Title">

<DateControls:MonthCalendarTitle x:Name="TitleHost" DataContext="{TemplateBinding VisibleMonth}" Style="{TemplateBinding TitleStyle}"/>

<RepeatButton x:Name="PART_PreviousButton" Command="DateControls:MonthCalendar.PreviousCommand"

Margin="7 5 0 0" HorizontalAlignment="Left" >

<Viewbox>

<Path Data="{StaticResource geometry}" Fill="Black">

<Path.LayoutTransform>

<RotateTransform Angle="90"/>

</Path.LayoutTransform>

</Path>

</Viewbox>

</RepeatButton>

<RepeatButton x:Name="PART_NextButton" Command="DateControls:MonthCalendar.NextCommand"

Margin="0 5 7 0" HorizontalAlignment="Right">

<Viewbox>

<Path Data="{StaticResource geometry}" Fill="Black">

<Path.LayoutTransform>

<RotateTransform Angle="-90"/>

</Path.LayoutTransform>

</Path>

</Viewbox>

</RepeatButton>

</Grid>

<!--heander end-->

注意点:

1.使用DataContext作为数据源

2.用RepeatButton当作按钮(可重复触发事件)

3.使用LayoutTransform翻转Geometry图形

4.自定义样式TitleStyle,默认为空

5.未见RepeatButton使用定义的ButtonBase样式?(可与第四点比较)

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