背水一戰 Windows 10 之 控制項(集合類 - ItemsControl 的佈局控制項): ItemsStackPanel, ItemsWrapGrid ...
背水一戰 Windows 10 (53) - 控制項(集合類): ItemsControl 的佈局控制項 - ItemsStackPanel, ItemsWrapGrid
作者:webabcd
介紹
背水一戰 Windows 10 之 控制項(集合類 - ItemsControl 的佈局控制項)
- ItemsStackPanel
- ItemsWrapGrid
示例
1、ItemsStackPanel 的示例
Controls/CollectionControl/ItemsControlDemo/LayoutControl/ItemsStackPanelDemo.xaml
<Page x:Class="Windows10.Controls.CollectionControl.ItemsControlDemo.LayoutControl.ItemsStackPanelDemo" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="using:Windows10.Controls.CollectionControl.ItemsControlDemo.LayoutControl" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" xmlns:common="using:Windows10.Common"> <Grid Background="Transparent"> <StackPanel Margin="10 0 10 10" Orientation="Horizontal"> <StackPanel Margin="5"> <!-- ItemsStackPanel - 虛擬化佈局控制項,ListView 的預設佈局控制項 Orientation - 子元素的排列方向 Vertical - 垂直排列,預設值 Horizontal - 水平排列 CacheLength - 可見區外的需要緩存的數據的大小(以可見區條數大小的倍數為單位),預設值為 4.0 比如當可見區可以顯示 10 條數據,CacheLength 為 4 時,可見區外的需要緩存的數據的大小則為 4 * 10 = 40,也就是說整個緩存數據的大小為 10 + 4 * 10 = 50 實際測試發現,可能會有一定的偏差,但是大體是準確的 --> <ListView Name="listView1" Margin="5" Width="400" Height="400" HorizontalAlignment="Left" ItemsSource="{x:Bind MyData.View}"> <ListView.ItemTemplate> <DataTemplate x:DataType="common:NavigationModel"> <Grid Background="Blue"> <TextBlock Text="{x:Bind Title}" /> </Grid> </DataTemplate> </ListView.ItemTemplate> <ListView.ItemsPanel> <ItemsPanelTemplate> <ItemsStackPanel Orientation="Vertical" CacheLength="4" /> </ItemsPanelTemplate> </ListView.ItemsPanel> </ListView> <TextBlock Name="lblMsg1" Margin="5" /> </StackPanel> <StackPanel Margin="5"> <!-- ItemsStackPanel - 虛擬化佈局控制項,ListView 的預設佈局控制項 GroupPadding - 每一個數據組的 padding GroupHeaderPlacement - 每一個數據組的 header 的顯示位置 Top - 頂部。預設值 Left - 左側 AreStickyGroupHeadersEnabled - 組 header 是否是固定的,即不隨組數據的滾動而滾動。預設值為 true --> <ListView Name="listView2" Margin="5" Width="400" Height="400" HorizontalAlignment="Left" ItemsSource="{x:Bind MyData.View}"> <ListView.GroupStyle> <GroupStyle> <GroupStyle.HeaderTemplate> <DataTemplate> <TextBlock Text="{Binding Title}" /> </DataTemplate> </GroupStyle.HeaderTemplate> </GroupStyle> </ListView.GroupStyle> <ListView.ItemTemplate> <DataTemplate> <TextBlock Text="{Binding Title}" /> </DataTemplate> </ListView.ItemTemplate> <ListView.ItemsPanel> <ItemsPanelTemplate> <ItemsStackPanel GroupPadding="4" GroupHeaderPlacement="Top" AreStickyGroupHeadersEnabled="{Binding IsChecked, ElementName=chkAreStickyGroupHeadersEnabled}" /> </ItemsPanelTemplate> </ListView.ItemsPanel> </ListView> <ComboBox x:Name="cmbGroupHeaderPlacement" Margin="5" PlaceholderText="GroupHeaderPlacement" SelectionChanged="cmbGroupHeaderPlacement_SelectionChanged"> <ComboBoxItem>Top</ComboBoxItem> <ComboBoxItem>Left</ComboBoxItem> </ComboBox> <CheckBox Name="chkAreStickyGroupHeadersEnabled" Content="AreStickyGroupHeadersEnabled" IsChecked="True" Margin="5" /> </StackPanel> </StackPanel> </Grid> </Page>
Controls/CollectionControl/ItemsControlDemo/LayoutControl/ItemsStackPanelDemo.xaml.cs
/* * ItemsStackPanel - 虛擬化佈局控制項,ListView 的預設佈局控制項(繼承自 Panel, 請參見 /Controls/LayoutControl/PanelDemo.xaml) * FirstCacheIndex - 緩存中的第一項在全部數據中的索引位置 * FirstVisibleIndex - 屏幕上顯示的第一項在全部數據中的索引位置 * LastCacheIndex - 緩存中的最後一項在全部數據中的索引位置 * LastVisibleIndex - 屏幕上顯示的最後一項在全部數據中的索引位置 * CacheLength - 可見區外的需要緩存的數據的大小(以可見區條數大小的倍數為單位),預設值為 4.0 * 比如當可見區可以顯示 10 條數據,CacheLength 為 4 時,可見區外的需要緩存的數據的大小則為 4 * 10 = 40,也就是說整個緩存數據的大小為 10 + 4 * 10 = 50 * 實際測試發現,可能會有一定的偏差,但是大體是準確的 */ using System; using System.Collections.Generic; using System.Linq; using System.Xml.Linq; using Windows.UI.Xaml; using Windows.UI.Xaml.Controls; using Windows.UI.Xaml.Controls.Primitives; using Windows.UI.Xaml.Data; using Windows10.Common; namespace Windows10.Controls.CollectionControl.ItemsControlDemo.LayoutControl { public sealed partial class ItemsStackPanelDemo : Page { public CollectionViewSource MyData { get { XElement root = XElement.Load("SiteMap.xml"); var items = LoadData(root); // 構造數據源 CollectionViewSource source = new CollectionViewSource(); source.IsSourceGrouped = true; source.Source = items; source.ItemsPath = new PropertyPath("Items"); return source; } } private ItemsStackPanel _itemsStackPanel1 = null; private ItemsStackPanel _itemsStackPanel2 = null; public ItemsStackPanelDemo() { this.InitializeComponent(); this.Loaded += ItemsStackPanelDemo_Loaded; } private void ItemsStackPanelDemo_Loaded(object sender, RoutedEventArgs e) { DispatcherTimer dTimer = new DispatcherTimer(); dTimer.Interval = TimeSpan.Zero; dTimer.Tick += DTimer_Tick; dTimer.Start(); // 獲取 ListView 中的 ItemsStackPanel 控制項 _itemsStackPanel1 = listView1.ItemsPanelRoot as ItemsStackPanel; _itemsStackPanel2 = listView2.ItemsPanelRoot as ItemsStackPanel; // 獲取 ListView 中的 ItemsStackPanel 控制項 // _itemsStackPanel1 = Helper.GetVisualChild<ItemsStackPanel>(listView1); // _itemsStackPanel2 = Helper.GetVisualChild<ItemsStackPanel>(listView2); } private void DTimer_Tick(object sender, object e) { lblMsg1.Text = "FirstCacheIndex: " + _itemsStackPanel1.FirstCacheIndex.ToString(); lblMsg1.Text += Environment.NewLine; lblMsg1.Text += "FirstVisibleIndex: " + _itemsStackPanel1.FirstVisibleIndex.ToString(); lblMsg1.Text += Environment.NewLine; lblMsg1.Text += "LastCacheIndex: " + _itemsStackPanel1.LastCacheIndex.ToString(); lblMsg1.Text += Environment.NewLine; lblMsg1.Text += "LastVisibleIndex: " + _itemsStackPanel1.LastVisibleIndex.ToString(); lblMsg1.Text += Environment.NewLine; lblMsg1.Text += "CacheLength: " + _itemsStackPanel1.CacheLength.ToString(); } private void cmbGroupHeaderPlacement_SelectionChanged(object sender, SelectionChangedEventArgs e) { _itemsStackPanel2.GroupHeaderPlacement = (GroupHeaderPlacement)Enum.Parse(typeof(GroupHeaderPlacement), (e.AddedItems[0] as ComboBoxItem).Content.ToString()); } // 解析 xml 數據 private List<NavigationModel> LoadData(XElement root) { if (root == null) return null; var items = from n in root.Elements("node") select new NavigationModel { Title = (string)n.Attribute("title"), Url = (string)n.Attribute("url"), Items = LoadData(n) }; return items.ToList(); } } }
2、ItemsWrapGrid 的示例
Controls/CollectionControl/ItemsControlDemo/LayoutControl/ItemsWrapGridDemo.xaml
<Page x:Class="Windows10.Controls.CollectionControl.ItemsControlDemo.LayoutControl.ItemsWrapGridDemo" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="using:Windows10.Controls.CollectionControl.ItemsControlDemo.LayoutControl" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" xmlns:common="using:Windows10.Common"> <Grid Background="Transparent"> <StackPanel Margin="10 0 10 10" Orientation="Horizontal"> <StackPanel Margin="5"> <!-- ItemsWrapGrid - 虛擬化佈局控制項,GridView 的預設佈局控制項 Orientation - 子元素的排列方向 Vertical - 垂直排列,預設值 Horizontal - 水平排列 ItemWidth - 每個 item 的寬 ItemHeight - 每個 item 的高 MaximumRowsOrColumns - 最大行數或最大列數(預設值為 -1) CacheLength - 可見區外的需要緩存的數據的大小(以可見區條數大小的倍數為單位),預設值為 4.0 比如當可見區可以顯示 10 條數據,CacheLength 為 4 時,可見區外的需要緩存的數據的大小則為 4 * 10 = 40,也就是說整個緩存數據的大小為 10 + 4 * 10 = 50 實際測試發現,可能會有一定的偏差,但是大體是準確的 --> <GridView Name="gridView1" Margin="5" Width="400" Height="400" HorizontalAlignment="Left" ItemsSource="{x:Bind MyData.View}"> <GridView.ItemTemplate> <DataTemplate x:DataType="common:NavigationModel"> <Grid Background="Blue"> <TextBlock Text="{x:Bind Title}" /> </Grid> </DataTemplate> </GridView.ItemTemplate> <GridView.ItemsPanel> <ItemsPanelTemplate> <ItemsWrapGrid Orientation="Horizontal" ItemWidth="120" ItemHeight="50" MaximumRowsOrColumns="3" CacheLength="4" /> </ItemsPanelTemplate> </GridView.ItemsPanel> </GridView> <TextBlock Name="lblMsg1" Margin="5" /> </StackPanel> <StackPanel Margin="5"> <!-- ItemsWrapGrid - 虛擬化佈局控制項,GridView 的預設佈局控制項 GroupPadding - 每一個數據組的 padding GroupHeaderPlacement - 每一個數據組的 header 的顯示位置 Top - 頂部。預設值 Left - 左側 AreStickyGroupHeadersEnabled - 組 header 是否是固定的,即不隨組數據的滾動而滾動。預設值為 true --> <ListView Name="gridView2" Margin="5" Width="400" Height="400" HorizontalAlignment="Left" ItemsSource="{x:Bind MyData.View}"> <ListView.GroupStyle> <GroupStyle> <GroupStyle.HeaderTemplate> <DataTemplate> <TextBlock Text="{Binding Title}" /> </DataTemplate> </GroupStyle.HeaderTemplate> </GroupStyle> </ListView.GroupStyle> <ListView.ItemTemplate> <DataTemplate> <TextBlock Text="{Binding Title}" Width="100" /> </DataTemplate> </ListView.ItemTemplate> <ListView.ItemsPanel> <ItemsPanelTemplate> <ItemsWrapGrid Orientation="Horizontal" MaximumRowsOrColumns="3" GroupPadding="4" GroupHeaderPlacement="Top" AreStickyGroupHeadersEnabled="{Binding IsChecked, ElementName=chkAreStickyGroupHeadersEnabled}" /> </ItemsPanelTemplate> </ListView.ItemsPanel> </ListView> <ComboBox x:Name="cmbGroupHeaderPlacement" Margin="5" PlaceholderText="GroupHeaderPlacement" SelectionChanged="cmbGroupHeaderPlacement_SelectionChanged"> <ComboBoxItem>Top</ComboBoxItem> <ComboBoxItem>Left</ComboBoxItem> </ComboBox> <CheckBox Name="chkAreStickyGroupHeadersEnabled" Content="AreStickyGroupHeadersEnabled" IsChecked="True" Margin="5" /> </StackPanel> </StackPanel> </Grid> </Page>
Controls/CollectionControl/ItemsControlDemo/LayoutControl/ItemsWrapGridDemo.xaml.cs
/* * ItemsWrapGrid - 虛擬化佈局控制項,GridView 的預設佈局控制項(繼承自 Panel, 請參見 /Controls/LayoutControl/PanelDemo.xaml) * FirstCacheIndex - 緩存中的第一項在全部數據中的索引位置 * FirstVisibleIndex - 屏幕上顯示的第一項在全部數據中的索引位置 * LastCacheIndex - 緩存中的最後一項在全部數據中的索引位置 * LastVisibleIndex - 屏幕上顯示的最後一項在全部數據中的索引位置 * CacheLength - 可見區外的需要緩存的數據的大小(以可見區條數大小的倍數為單位),預設值為 4.0 * 比如當可見區可以顯示 10 條數據,CacheLength 為 4 時,可見區外的需要緩存的數據的大小則為 4 * 10 = 40,也就是說整個緩存數據的大小為 10 + 4 * 10 = 50 * 實際測試發現,可能會有一定的偏差,但是大體是準確的 */ using System; using System.Collections.Generic; using System.Linq; using System.Xml.Linq; using Windows.UI.Xaml; using Windows.UI.Xaml.Controls; using Windows.UI.Xaml.Controls.Primitives; using Windows.UI.Xaml.Data; using Windows10.Common; namespace Windows10.Controls.CollectionControl.ItemsControlDemo.LayoutControl { public sealed partial class ItemsWrapGridDemo : Page { public CollectionViewSource MyData { get { XElement root = XElement.Load("SiteMap.xml"); var items = LoadData(root); // 構造數據源 CollectionViewSource source = new CollectionViewSource(); source.IsSourceGrouped = true; source.Source = items; source.ItemsPath = new PropertyPath("Items"); return source; } } private ItemsWrapGrid _itemsWrapGrid1 = null; private ItemsWrapGrid _itemsWrapGrid2 = null; public ItemsWrapGridDemo() { this.InitializeComponent(); this.Loaded += ItemsWrapGridDemo_Loaded; } private void ItemsWrapGridDemo_Loaded(object sender, RoutedEventArgs e) { DispatcherTimer dTimer = new DispatcherTimer(); dTimer.Interval = TimeSpan.Zero; dTimer.Tick += DTimer_Tick; dTimer.Start(); // 獲取 GridView 中的 ItemsWrapGrid 控制項 _itemsWrapGrid1 = gridView1.ItemsPanelRoot as ItemsWrapGrid; _itemsWrapGrid2 = gridView2.ItemsPanelRoot as ItemsWrapGrid; // 獲取 GridView 中的 ItemsWrapGrid 控制項 // _itemsWrapGrid1 = Helper.GetVisualChild<ItemsWrapGrid>(gridView1); // _itemsWrapGrid2 = Helper.GetVisualChild<ItemsWrapGrid>(gridView2); } private void DTimer_Tick(object sender, object e) { lblMsg1.Text = "FirstCacheIndex: " + _itemsWrapGrid1.FirstCacheIndex.ToString(); lblMsg1.Text += Environment.NewLine; lblMsg1.Text += "FirstVisibleIndex: " + _itemsWrapGrid1.FirstVisibleIndex.ToString(); lblMsg1.Text += Environment.NewLine; lblMsg1.Text += "LastCacheIndex: " + _itemsWrapGrid1.LastCacheIndex.ToString(); lblMsg1.Text += Environment.NewLine; lblMsg1.Text += "LastVisibleIndex: " + _itemsWrapGrid1.LastVisibleIndex.ToString(); lblMsg1.Text += Environment.NewLine; lblMsg1.Text += "CacheLength: " + _itemsWrapGrid1.CacheLength.ToString(); } private void cmbGroupHeaderPlacement_SelectionChanged(object sender, SelectionChangedEventArgs e) { _itemsWrapGrid2.GroupHeaderPlacement = (GroupHeaderPlacement)Enum.Parse(typeof(GroupHeaderPlacement), (e.AddedItems[0] as ComboBoxItem).Content.ToString()); } // 解析 xml 數據 private List<NavigationModel> LoadData(XElement root) { if (root == null) return null; var items = from n in root.Elements("node") select new NavigationModel { Title = (string)n.Attribute("title"), Url = (string)n.Attribute("url"), Items = LoadData(n) }; return items.ToList(); } } }
OK
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