WP7自定义控件 评分控件
WP7自定义控件 评分控件
最近在写一个新的APP程序，需要使用评分功能，WP的Toolkit里面没有包含，只能自己写一个了。
评分控件要点
评分控件已经很熟悉了，还是总结一下要点。
1. 由10个（可配置）横排的五星组成，默认非高亮色（灰色）
2. 得分由从左到右高亮（如红色，颜色可配置）显示得分数量的五星，控件能够提供获取和设置得分的属性。
3. 可以点击其中一个五星修改评分。
4. 为了提高触摸体验，支持拖动控件修改得分
根据要点设计控件
根据要点1设计控件布局
Horizontal排列的StackPanel（包含在ItemsControl 控件内部） 和 绘制五星的Path 组成。
最上面提供一个透明的Rectangle扩展触摸空间（WP只能在绘制的控件上触摸）。
<ItemsControl x:Name="stars">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal" />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Path Data="M16,0 L19.77688,12.223213 L32.000001,12.222913 L22.111121,19.776973 L25.888544,32.000001 L16,24.445454 L6.1114563,32.000001 L9.88888,19.776973 L2.2971745E-08,12.222913 L12.22312,12.223213 z"
Fill="{Binding Fill}" HorizontalAlignment="Left" Height="32" Margin="1,0" Width="32"
Stretch="Fill" VerticalAlignment="Top" />
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
<Rectangle Fill="#00000000"/>
根据要点1、2设计控件属性
Brush MarkedFill 选中了的五星刷子
Brush UnMarkedFill 未选中的五星刷子
int MaxStars 最大五星数量
Marked 当前评价值
根据要点2设计控件属性改变行为
很简单获取Marked 然后将每个五星都修改一下颜色
private void FillStars(int index)
{
if (!VerifyValue(index)) return;
for (int i = 0, length = starItems.Count; i < length; i++)
{
var star = starItems[i];
if (i > index)
{
star.Fill = UnMarkedFill;
}
else
{
star.Fill = MarkedFill;
}
}
}
根据要点3、4设计控件触控行为
将2个要点合并了，实现方法为：
• 滑动前（点中）： 修改为当前X轴的高亮位置
• 滑动中：根据X轴变化高亮位置
• 滑动完成（放开）： 修改为当前X轴的高亮位置，并更新评分Marked 当前评价值
通过五星的宽度可以获取X轴所在的五星
代码如下：
protected override void OnManipulationStarted(ManipulationStartedEventArgs e)
{
e.Handled = true;
UpdateStar(e.ManipulationOrigin);
base.OnManipulationStarted(e);
}
protected override void OnManipulationDelta(ManipulationDeltaEventArgs e)
{
e.Handled = true;
UpdateStar(e.ManipulationOrigin);
base.OnManipulationDelta(e);
}
protected override void OnManipulationCompleted(ManipulationCompletedEventArgs e)
{
e.Handled = true;
var index = UpdateStar(e.ManipulationOrigin);
if (VerifyValue(index)) { Marked = index + 1; }
base.OnManipulationCompleted(e);
}
完整代码
View Code
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Diagnostics;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
namespace KimiStudio.Controls
{
public class StarMark : Control
{
private ItemsControl stars;
private const int StarSize = 34;
private ObservableCollection<StarItem> starItems;
#region DependencyPropertys
public static readonly DependencyProperty MarkedFillProperty =
DependencyProperty.Register("MarkedFill", typeof(Brush), typeof(StarMark),
new PropertyMetadata(new SolidColorBrush(Colors.Red)));
public static readonly DependencyProperty UnMarkedFillProperty =
DependencyProperty.Register("UnMarkedFill", typeof(Brush), typeof(StarMark),
new PropertyMetadata(new SolidColorBrush(Colors.DarkGray)));
public static readonly DependencyProperty MaxStarsProperty =
DependencyProperty.Register("MaxStars", typeof(int), typeof(StarMark),
new PropertyMetadata(10));
public static readonly DependencyProperty MarkedProperty =
DependencyProperty.Register("Marked", typeof(int), typeof(StarMark),
new PropertyMetadata(0, OnMarkedPropertyChanged));
public int Marked
{
get { return (int)GetValue(MarkedProperty); }
set { SetValue(MarkedProperty, value); }
}
public int MaxStars
{
get { return (int)GetValue(MaxStarsProperty); }
set { SetValue(MaxStarsProperty, value); }
}
public Brush UnMarkedFill
{
get { return (Brush)GetValue(UnMarkedFillProperty); }
set { SetValue(UnMarkedFillProperty, value); }
}
public Brush MarkedFill
{
get { return (Brush)GetValue(MarkedFillProperty); }
set { SetValue(MarkedFillProperty, value); }
}
private static void OnMarkedPropertyChanged(DependencyObject o, DependencyPropertyChangedEventArgs args)
{
var starMark = o as StarMark;
if (starMark == null || args.NewValue == args.OldValue) return;
starMark.SetMarked((int)args.NewValue);
}
#endregion
public StarMark()
{
this.DefaultStyleKey = typeof(StarMark);
}
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
stars = (ItemsControl)GetTemplateChild("stars");
starItems = new ObservableCollection<StarItem>();
for (int i = 0, length = MaxStars; i < length; i++)
{
starItems.Add(new StarItem { Fill = UnMarkedFill });
}
stars.ItemsSource = starItems;
SetMarked(Marked);
}
private void SetMarked(int value)
{
if (stars == null) return; ;
FillStars(value - 1);
}
protected override void OnManipulationStarted(ManipulationStartedEventArgs e)
{
e.Handled = true;
UpdateStar(e.ManipulationOrigin);
base.OnManipulationStarted(e);
}
protected override void OnManipulationDelta(ManipulationDeltaEventArgs e)
{
e.Handled = true;
UpdateStar(e.ManipulationOrigin);
base.OnManipulationDelta(e);
}
protected override void OnManipulationCompleted(ManipulationCompletedEventArgs e)
{
e.Handled = true;
var index = UpdateStar(e.ManipulationOrigin);
if (VerifyValue(index)) { Marked = index + 1; }
base.OnManipulationCompleted(e);
}
private int UpdateStar(Point point)
{
int x = (int)point.X;
int index = x / StarSize;
FillStars(index);
return index;
}
//SL可用
//protected override void OnMouseLeftButtonUp(MouseButtonEventArgs e)
//{
// int x = (int)e.GetPosition(stars).X;
// int index = x / StarSize;
// FillStars(index);
// if (VerifyValue(index)) { Marked = index + 1; }
// base.OnMouseLeftButtonUp(e);
//}
private bool VerifyValue(int index)
{
if (index < 0 || index >= stars.Items.Count) return false;
return true;
}
private void FillStars(int index)
{
if (!VerifyValue(index)) return;
for (int i = 0, length = starItems.Count; i < length; i++)
{
var star = starItems[i];
if (i > index)
{
star.Fill = UnMarkedFill;
}
else
{
star.Fill = MarkedFill;
}
}
}
public class StarItem : INotifyPropertyChanged
{
private Brush fill;
public event PropertyChangedEventHandler PropertyChanged;
public Brush Fill
{
get { return fill; }
set
{
if (fill == value) return;
fill = value;
OnPropertyChanged("Fill");
}
}
private void OnPropertyChanged(string propertyName)
{
var handler = PropertyChanged;
if (handler == null) return;
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
}
}
对应的Generic.xaml
View Code
<Style TargetType="local:StarMark">
<Setter Property="Width" Value="340"/>
<Setter Property="Height" Value="35"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="local:StarMark">
<Grid>
<ItemsControl x:Name="stars">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal" />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Path Data="M16,0 L19.77688,12.223213 L32.000001,12.222913 L22.111121,19.776973 L25.888544,32.000001 L16,24.445454 L6.1114563,32.000001 L9.88888,19.776973 L2.2971745E-08,12.222913 L12.22312,12.223213 z"
Fill="{Binding Fill}" HorizontalAlignment="Left" Height="32" Margin="1,0" Width="32"
Stretch="Fill" VerticalAlignment="Top" />
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
<Rectangle Fill="#00000000"/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
摘自 kiminozo
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