ListView 视图（View）

自定义视图，设置默认ListView,ListViewItems默认样式

public class VirtualStackPanelView : ViewBase
    {
        public static readonly DependencyProperty OrientationProperty =
            VirtualStackPanel.OrientationProperty.AddOwner(typeof(VirtualStackPanelView));

        public Orientation Orientation
        {
            get { return (Orientation)GetValue(OrientationProperty); }
            set { SetValue(OrientationProperty, value); }
        }

        public static readonly DependencyProperty SmallChangesProperty =
           VirtualStackPanel.SmallChangesProperty.AddOwner(typeof(VirtualStackPanelView));

        public uint SmallChanges
        {
            get { return (uint)GetValue(SmallChangesProperty); }
            set { SetValue(SmallChangesProperty, value); }
        }

        public static readonly DependencyProperty ItemContainerStyleProperty =
            ItemsControl.ItemContainerStyleProperty.AddOwner(typeof(VirtualStackPanelView));

        public Style ItemContainerStyle
        {
            get { return (Style)GetValue(ItemContainerStyleProperty); }
            set { SetValue(ItemContainerStyleProperty, value); }
        }

        public static readonly DependencyProperty ItemTemplateProperty =
            ItemsControl.ItemTemplateProperty.AddOwner(typeof(VirtualStackPanelView));

        public DataTemplate ItemTemplate
        {
            get { return (DataTemplate)GetValue(ItemTemplateProperty); }
            set { SetValue(ItemTemplateProperty, value); }
        }

        public static readonly DependencyProperty ItemWidthProperty =
            VirtualStackPanel.ItemWidthProperty.AddOwner(typeof(VirtualStackPanelView));

        public double ItemWidth
        {
            get { return (double)GetValue(ItemWidthProperty); }
            set { SetValue(ItemWidthProperty, value); }
        }

        public static readonly DependencyProperty ItemHeightProperty =
            VirtualStackPanel.ItemHeightProperty.AddOwner(typeof(VirtualStackPanelView));

        public double ItemHeight
        {
            get { return (double)GetValue(ItemHeightProperty); }
            set { SetValue(ItemHeightProperty, value); }
        }


        public static readonly DependencyProperty HorizontalContentAlignmentProperty =
            StackPanel.HorizontalAlignmentProperty.AddOwner(typeof(VirtualStackPanelView));

        public HorizontalAlignment HorizontalContentAlignment
        {
            get { return (HorizontalAlignment)GetValue(HorizontalContentAlignmentProperty); }
            set { SetValue(HorizontalContentAlignmentProperty, value); }
        }
       
        public static readonly DependencyProperty CacheItemCountProperty =
            DependencyProperty.Register("CacheItemCount", typeof(int),
            typeof(VirtualStackPanelView), new UIPropertyMetadata(0));

        public int CacheItemCount
        {
            get { return (int)GetValue(CacheItemCountProperty); }
            set { SetValue(CacheItemCountProperty, value); }
        }
        


        private GridViewColumnCollection _columns = new GridViewColumnCollection();
        public GridViewColumnCollection Columns
        {
            get { return _columns; }            
        }

        public static readonly DependencyProperty ColumnHeaderContainerStyleProperty =
            GridView.ColumnHeaderContainerStyleProperty.AddOwner(typeof(VirtualStackPanelView));
        public Style ColumnHeaderContainerStyle
        {
            get { return (Style)GetValue(ColumnHeaderContainerStyleProperty); }
            set { SetValue(ColumnHeaderContainerStyleProperty, value); }
        }

        public static readonly DependencyProperty ColumnHeaderTemplateSelectorProperty =
            GridView.ColumnHeaderTemplateSelectorProperty.AddOwner(typeof(VirtualStackPanelView));
        public static readonly DependencyProperty ColumnHeaderStringFormatProperty =
             GridView.ColumnHeaderStringFormatProperty.AddOwner(typeof(VirtualStackPanelView));
        public static readonly DependencyProperty AllowsColumnReorderProperty =
            GridView.AllowsColumnReorderProperty.AddOwner(typeof(VirtualStackPanelView));
        public static readonly DependencyProperty ColumnHeaderContextMenuProperty =
            GridView.ColumnHeaderContextMenuProperty.AddOwner(typeof(VirtualStackPanelView));
        public static readonly DependencyProperty ColumnHeaderToolTipProperty =
            GridView.ColumnHeaderToolTipProperty.AddOwner(typeof(VirtualStackPanelView));

        protected override object DefaultStyleKey
        {
            get
            {
                return new ComponentResourceKey(GetType(), "virtualStackPanelViewDSK");                
            }
        }

        protected override object ItemContainerDefaultStyleKey
        {
            get
            {
                return new ComponentResourceKey(GetType(), "virtualStackPanelViewItemDSK");
            }
        }
    }

查看ListView源码发现，当视图改变的时候,用当前视图的DefaultStyleKey，ItemContainerDefaultStyleKey设置ListView的默认样式和项容器样式，对于默认视图和我们自定义的视图

 1 public class ListView : ListBox
 2     {
 3         public static readonly DependencyProperty ViewProperty;
 4         private ViewBase _previousView;
 5         public ViewBase View
 6         {
 7             get
 8             {
 9                 return (ViewBase)base.GetValue(ListView.ViewProperty);
10             }
11             set
12             {
13                 base.SetValue(ListView.ViewProperty, value);
14             }
15         }
16         static ListView()
17         {
18             ListView.ViewProperty = DependencyProperty.Register("View", typeof(ViewBase), typeof(ListView), new PropertyMetadata(new PropertyChangedCallback(ListView.OnViewChanged)));
19             ListBox.SelectionModeProperty.OverrideMetadata(typeof(ListView), new FrameworkPropertyMetadata(SelectionMode.Extended));
20         }
21         private static void OnViewChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
22         {
23             ListView listView = (ListView)d;
24             ViewBase viewBase = (ViewBase)e.OldValue;
25             ViewBase viewBase2 = (ViewBase)e.NewValue;
26             if (viewBase2 != null)
27             {
28                 if (viewBase2.IsUsed)
29                 {
30                     throw new InvalidOperationException(SR.Get("ListView_ViewCannotBeShared"));
31                 }
32                 viewBase2.IsUsed = true;
33             }
34             listView._previousView = viewBase;
35             listView.ApplyNewView();
36             listView._previousView = viewBase2;
37             ListViewAutomationPeer listViewAutomationPeer = UIElementAutomationPeer.FromElement(listView) as ListViewAutomationPeer;
38             if (listViewAutomationPeer != null)
39             {
40                 if (listViewAutomationPeer.ViewAutomationPeer != null)
41                 {
42                     listViewAutomationPeer.ViewAutomationPeer.ViewDetached();
43                 }
44                 if (viewBase2 != null)
45                 {
46                     listViewAutomationPeer.ViewAutomationPeer = viewBase2.GetAutomationPeer(listView);
47                 }
48                 else
49                 {
50                     listViewAutomationPeer.ViewAutomationPeer = null;
51                 }
52                 listViewAutomationPeer.InvalidatePeer();
53             }
54             if (viewBase != null)
55             {
56                 viewBase.IsUsed = false;
57             }
58         }
59         protected override void PrepareContainerForItemOverride(DependencyObject element, object item)
60         {
61             base.PrepareContainerForItemOverride(element, item);
62             ListViewItem listViewItem = element as ListViewItem;
63             if (listViewItem != null)
64             {
65                 ViewBase view = this.View;
66                 if (view != null)
67                 {
68                     listViewItem.SetDefaultStyleKey(view.ItemContainerDefaultStyleKey);
69                     view.PrepareItem(listViewItem);
70                     return;
71                 }
72                 listViewItem.ClearDefaultStyleKey();
73             }
74         }
75                 private void ApplyNewView()
76         {
77             ViewBase view = this.View;
78             if (view != null)
79             {
80                 base.DefaultStyleKey = view.DefaultStyleKey;
81             }
82             else
83             {
84                 base.ClearValue(FrameworkElement.DefaultStyleKeyProperty);
85             }
86             if (base.IsLoaded)
87             {
88                 base.ItemContainerGenerator.Refresh();
89             }
90         }
91       }

定义ListView和ListViewItem的样式，自定义视图里的DefaultStyleKey和ItemContainerDefaultStyleKey就是我们这里设置的样式

 1 <Style x:Key="{ComponentResourceKey TypeInTargetAssembly={x:Type uc:VirtualStackPanelView}, ResourceId=virtualStackPanelViewDSK}" 
 2                                         TargetType="{x:Type ListView}"
 3        >
 4         <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
 5 
 6         <Setter Property="ItemContainerStyle" 
 7           Value="{Binding (ListView.View).ItemContainerStyle,
 8           RelativeSource={RelativeSource Self}}"/>
 9 
10         <Setter Property="ItemTemplate" 
11           Value="{Binding (ListView.View).ItemTemplate,
12           RelativeSource={RelativeSource Self}}"/>
13         <Setter Property="ItemsPanel">
14             <Setter.Value>
15                 <ItemsPanelTemplate>
16                     <uc:VirtualStackPanel Width="{Binding (FrameworkElement.ActualWidth),
17                    RelativeSource={RelativeSource AncestorType=ScrollContentPresenter}}"                                         
18                    Orientation="{Binding (ListView.View).Orientation, RelativeSource={RelativeSource AncestorType=ListView}}"                      
19                    SmallChanges="{Binding (ListView.View).SmallChanges, RelativeSource={RelativeSource AncestorType=ListView}}"                      
20                    ItemWidth="{Binding (ListView.View).ItemWidth, RelativeSource={RelativeSource AncestorType=ListView}}"
21                    MinWidth="{Binding ItemWidth, RelativeSource={RelativeSource Self}}"
22                    ItemHeight="{Binding (ListView.View).ItemHeight, RelativeSource={RelativeSource AncestorType=ListView}}"
23                    CacheItemCount="{Binding (ListView.View).CacheItemCount, RelativeSource={RelativeSource AncestorType=ListView}}"
24                                          />
25                     
26                 </ItemsPanelTemplate>
27             </Setter.Value>
28         </Setter>
29     </Style>
30 
31     <Style x:Key="lvItemSelectStyle" TargetType="{x:Type ListViewItem}">
32         <Style.Resources>
33             <ResourceDictionary Source="pack://application:,,,/QuickZip.UserControls;component/Themes/Brushes.xaml" />
34         </Style.Resources>
35         <!--<Setter Property="Margin" Value="1,2,1,1"/>-->
36         <Setter Property="HorizontalAlignment" Value="Stretch" />
37         <Setter Property="HorizontalContentAlignment" Value="Left" />
38         <Setter Property="VerticalContentAlignment" Value="Stretch" />
39 
40         <!--<Setter Property="Background" Value="{TemplateBinding ListViewItem.Background}" />-->
41         <Setter Property="Template">
42             <Setter.Value>
43                 <ControlTemplate TargetType="{x:Type ListBoxItem}">
44                     <Border x:Name="border" BorderBrush="{StaticResource LightBorderBrush}" 
45                             BorderThickness="0" Padding="1" Background="{TemplateBinding Background}" >                        
46                             <ContentPresenter Margin="5,0" />                        
47                     </Border>
48                     <ControlTemplate.Triggers>
49                         <MultiTrigger>
50                             <MultiTrigger.Conditions>
51                                 <Condition Property="IsMouseOver" Value="True" />
52                                 <Condition Property="IsSelected" Value="False"/>
53                             </MultiTrigger.Conditions>
54                             <Setter Property="Background" Value="{StaticResource HotTrackBrush}" />
55                             <Setter TargetName="border" Property="Padding" Value="0" />
56                             <Setter TargetName="border" Property="BorderThickness" Value="1" />
57                         </MultiTrigger>
58                         <Trigger Property="IsSelected" Value="True">
59                             <Setter Property="Background" Value="{StaticResource SelectedBackgroundBrush}" />
60                             <Setter TargetName="border" Property="Padding" Value="0" />
61                             <Setter TargetName="border" Property="BorderThickness" Value="1" />
62                         </Trigger>
63                         <Trigger Property="uc:SelectionHelper.IsDragging" Value="True">
64                             <Setter Property="Background" Value="{StaticResource HotTrackBrush}" />
65                             <Setter TargetName="border" Property="Padding" Value="0" />
66                             <Setter TargetName="border" Property="BorderThickness" Value="1" />
67                         </Trigger>
68                     </ControlTemplate.Triggers>
69                 </ControlTemplate>
70             </Setter.Value>
71         </Setter>
72     </Style>
73 
74     <Style x:Key="{ComponentResourceKey TypeInTargetAssembly={x:Type uc:VirtualStackPanelView}, ResourceId=virtualStackPanelViewItemDSK}" 
75            TargetType="{x:Type ListViewItem}" BasedOn="{StaticResource lvItemSelectStyle}" >
76     </Style>

设置我们的视图，在视图中定义我么的ItemTemplate样式，用于填充项容器的ContentPresenter的内容

 1 <uc:VirtualWrapPanelView x:Key="IconView"  ColumnHeaderContainerStyle="{StaticResource ColumnHeaderContainerStyle}"                              
 2                              ItemHeight="{Binding RelativeSource={RelativeSource AncestorType=uc:FileList2}, Path=ViewSize, Converter={StaticResource iac}}"
 3                              ItemWidth="{Binding RelativeSource={RelativeSource AncestorType=uc:FileList2}, Path=ViewSize, Converter={StaticResource iac}}"
 4                              SmallChanges="{Binding Path=ItemHeight, RelativeSource={RelativeSource Self}}"                             
 5                              CacheItemCount="0"
 6                              HorizontalContentAlignment="Left" >        
 7         <uc:VirtualWrapPanelView.ItemTemplate>
 8             <DataTemplate>
 9                 <DockPanel Margin="2,1,1,0">
10                     <Image 
11                            x:Name="img" DockPanel.Dock="Top" HorizontalAlignment="Center" Stretch= "UniformToFill"
12                            Height="{Binding RelativeSource={RelativeSource AncestorType=uc:FileList2}, Path=ViewSize}" 
13                            Width="{Binding RelativeSource={RelativeSource AncestorType=uc:FileList2}, Path=ViewSize}" 
14                            Source="{Binding JumboIcon.Item2.Value}"
15                             />
16                     <StackPanel Orientation="Horizontal" HorizontalAlignment="Center">
17                         <uc:EditBox x:Name="eb" Margin="0,0"                            
18                         DisplayValue="{Binding EmbeddedModel.Label}" 
19                         ActualValue="{Binding Name, Mode=TwoWay}" 
20                         IsEditable="{Binding EmbeddedModel.IsEditable}"        
21                         IsEditing="{Binding IsEditing, Mode=TwoWay}"
22                         />
23                         <TextBlock Text="[*]" Visibility="{Binding EmbeddedModel.IsEncrypted, Converter={StaticResource btv}}" />
24                     </StackPanel>
25                 </DockPanel>
26             </DataTemplate>
27         </uc:VirtualWrapPanelView.ItemTemplate>
28         <uc:VirtualWrapPanelView.Columns>
29             <GridViewColumn Width="100" Header="{x:Static trans:Texts.strHeaderFile}"  uc:FileList2.SortPropertyName="sortByFullName" />
30             <GridViewColumn Width="100" Header="{x:Static trans:Texts.strHeaderType}" uc:FileList2.SortPropertyName="sortByType" />
31             <GridViewColumn Width="100" Header="{x:Static trans:Texts.strHeaderTime}" uc:FileList2.SortPropertyName="sortByLastWriteTime" />
32             <GridViewColumn Width="100" Header="{x:Static trans:Texts.strHeaderSize}" uc:FileList2.SortPropertyName="sortByLength" />
33         </uc:VirtualWrapPanelView.Columns>
34     </uc:VirtualWrapPanelView>