http://blog.csdn.net/wangrenzhu2011/article/details/7732907 (转)
实现方法:
对Manipulation进行抽象化 使不同容器可共用多点缩放事件,
C# 代码如下:
- using System;
- using System.Collections.Generic;
- using System.Linq;
- using System.Text;
- using System.Threading.Tasks;
- using Windows.Foundation;
- using Windows.UI.Xaml;
- using Windows.UI.Xaml.Controls;
- using Windows.UI.Xaml.Input;
- using Windows.UI.Xaml.Media;
- using Windows.UI.Xaml.Media.Animation;
- namespace MetroTimeline
- {
- public class MetroManipulationHelper
- {
- /// <summary>
- /// 发生碰撞时的操作方法库
- /// </summary>
- public static Dictionary<Predicate<string>, Action<ManipulationDeltaRoutedEventArgs>>
- BoundaryFeedbackDict = new Dictionary<Predicate<string>, Action<ManipulationDeltaRoutedEventArgs>>();
- /// <summary>
- /// 多点触控开始后方法库
- /// </summary>
- public static Dictionary<Predicate<string>, Action<ManipulationStartedRoutedEventArgs>>
- ManipulationStartedDict = new Dictionary<Predicate<string>, Action<ManipulationStartedRoutedEventArgs>>();
- /// <summary>
- /// 多点触控完成后方法库
- /// </summary>
- public static Dictionary<Predicate<string>, Action<ManipulationCompletedRoutedEventArgs>>
- ManipulationCompletedDict = new Dictionary<Predicate<string>, Action<ManipulationCompletedRoutedEventArgs>>();
- /// <summary>
- /// 需要执行的方法的关键字
- /// </summary>
- private static string methodTag;
- public static string MethodTag
- {
- get { return MetroManipulationHelper.methodTag; }
- set { MetroManipulationHelper.methodTag = value; }
- }
- /// <summary>
- /// 将容器变为多点操控容器
- /// </summary>
- /// <param name="container"></param>
- /// <param name="mode"></param>
- /// <param name="trans"></param>
- /// <param name="scale"></param>
- /// <param name="rotation"></param>
- /// <param name="containerRect">容器相对父级菜单位置</param>
- public static void InitManipulation(FrameworkElement container, ManipulationModes mode,
- double trans, double scale, double rotation, Rect containerRect)
- {
- BoundaryFeedbackDict.Add(s => s.Equals("default"), e =>
- {
- var element = e.OriginalSource as FrameworkElement;
- var con = e.Container as Panel;
- var elementBounds = element.RenderTransform.TransformBounds(new Rect(e.Position, element.RenderSize));
- Point fp = new Point((elementBounds.Left + elementBounds.Right) / 2, (elementBounds.Top + elementBounds.Bottom) / 2);
- if (fp.X < containerRect.Left ||
- fp.X > containerRect.Right ||
- fp.Y < containerRect.Top ||
- fp.Y > containerRect.Bottom)
- {
- e.Complete();
- }
- });
- container.ManipulationStarting += ElementManipulationEventHandler(container, mode);
- container.ManipulationDelta += ElementManipulationDeltaEventHandler();
- container.ManipulationStarted += ElementManipulationStartedEventHandler();
- container.ManipulationCompleted += ElementManipulationCompletedEventHandler();
- container.ManipulationInertiaStarting += ElementManipulationInertiaStartingEventHandler(trans, scale, rotation);
- foreach (var item in (container as Panel).Children)
- {
- if (item.ManipulationMode == ManipulationModes.All)
- {
- var group = new TransformGroup();
- group.Children.Add(new TranslateTransform());
- group.Children.Add(new ScaleTransform());
- group.Children.Add(new RotateTransform());
- item.RenderTransform = group;
- }
- }
- }
- #region 多点手势方法
- #region 多点触控手势开始操作
- public static ManipulationStartingEventHandler ElementManipulationEventHandler(FrameworkElement element, ManipulationModes mode)
- {
- return (sender, e) =>
- {
- e.Container = element;
- e.Mode = mode;
- };
- }
- #endregion
- #region 多点触控手势过程中操作
- public static ManipulationDeltaEventHandler ElementManipulationDeltaEventHandler()
- {
- return ((sender, e) =>
- {
- var element = e.OriginalSource as FrameworkElement;
- var center = new Point(element.ActualWidth / 2, element.ActualHeight / 2);
- var tt = (element.RenderTransform as TransformGroup).Children[0] as TranslateTransform;
- tt.X += e.Delta.Translation.X;
- tt.Y += e.Delta.Translation.Y;
- var st = (element.RenderTransform as TransformGroup).Children[1] as ScaleTransform;
- st.CenterX = center.X;
- st.CenterY = center.Y;
- st.ScaleX *= e.Delta.Scale;
- st.ScaleY *= e.Delta.Scale;
- var rt = (element.RenderTransform as TransformGroup).Children[2] as RotateTransform;
- rt.CenterX = center.X;
- rt.CenterY = center.Y;
- rt.Angle += e.Delta.Rotation;
- if (e.IsInertial)
- if (null != BoundaryFeedbackDict)
- foreach (var item in BoundaryFeedbackDict)
- {
- if (null != MethodTag)
- if (item.Key(MethodTag)) item.Value(e);
- };
- });
- }
- #endregion
- #region 多点手势开始后
- private static ManipulationStartedEventHandler ElementManipulationStartedEventHandler()
- {
- return (sender, e) =>
- {
- if (null != ManipulationStartedDict)
- foreach (var item in ManipulationStartedDict)
- {
- if (null != MethodTag)
- if (item.Key(MethodTag)) item.Value(e);
- };
- };
- }
- #endregion
- #region 多点手势完成
- private static ManipulationCompletedEventHandler ElementManipulationCompletedEventHandler()
- {
- return (sender, e) =>
- {
- if (null != ManipulationCompletedDict)
- foreach (var item in ManipulationCompletedDict)
- {
- if (null != MethodTag)
- if (item.Key(MethodTag)) item.Value(e);
- };
- };
- }
- #endregion
- #region 多点手势惯性开始
- /// <summary>
- ///
- /// </summary>
- /// <param name="trans">10</param>
- /// <param name="scale">0.1</param>
- /// <param name="rotation">540</param>
- /// <returns></returns>
- private static ManipulationInertiaStartingEventHandler ElementManipulationInertiaStartingEventHandler(double trans, double scale, double rotation)
- {
- return (sender, e) =>
- {
- e.TranslationBehavior.DesiredDeceleration = trans * 96.0 / (1000.0 * 1000.0);
- e.ExpansionBehavior.DesiredDeceleration = scale * 96 / 1000.0 * 1000.0;
- e.RotationBehavior.DesiredDeceleration = rotation / (1000.0 * 1000.0);
- };
- }
- #endregion
- #endregion
- }
- }
xaml :
- <Page
- x:Class="MetroTimeline.MainPage"
- IsTabStop="false"
- xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
- xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
- xmlns:local="using:MetroTimeline"
- xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
- xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
- mc:Ignorable="d">
- <Canvas Background="{StaticResource ApplicationPageBackgroundThemeBrush}"
- Width="1080" Height="500"
- x:Name="cvsContent" Tag="default">
- <TextBlock Canvas.Left="573" TextWrapping="Wrap" Text="TextBlock" x:Name="tbInfo" ManipulationMode="All" Margin="219,597,171,10"/>
- <Image Source="Assets/PicWallLoading.jpg" ManipulationMode="All" Height="202" Canvas.Left="75" Canvas.Top="209" Width="153"/>
- <Image Source="Assets/PicWallLoading.jpg" ManipulationMode="All" Height="202" Canvas.Left="333" Canvas.Top="83" Width="153"/>
- </Canvas>
- </Page>
使用方式:
- using System;
- using System.Collections.Generic;
- using System.IO;
- using System.Linq;
- using System.Threading.Tasks;
- using Windows.Foundation;
- using Windows.Foundation.Collections;
- using Windows.UI.Xaml;
- using Windows.UI.Xaml.Controls;
- using Windows.UI.Xaml.Controls.Primitives;
- using Windows.UI.Xaml.Data;
- using Windows.UI.Xaml.Input;
- using Windows.UI.Xaml.Media;
- using Windows.UI.Xaml.Navigation;
- // The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234238
- namespace MetroTimeline
- {
- /// <summary>
- /// An empty page that can be used on its own or navigated to within a Frame.
- /// </summary>
- public sealed partial class MainPage : Page
- {
- public MainPage()
- {
- this.InitializeComponent();
- var conRect = new Rect(Canvas.GetLeft(cvsContent), Canvas.GetTop(cvsContent),
- cvsContent.Width, cvsContent.Height);
- MetroManipulationHelper.InitManipulation(cvsContent, ManipulationModes.All, 5, 0.5, 360, conRect);
- MetroManipulationHelper.MethodTag = cvsContent.Tag.ToString();
- }
- /// <summary>
- /// Invoked when this page is about to be displayed in a Frame.
- /// </summary>
- /// <param name="e">Event data that describes how this page was reached. The Parameter
- /// property is typically used to configure the page.</param>
- protected override void OnNavigatedTo(NavigationEventArgs e)
- {
- }
- }
- }
conRect 为当前需要操作的容器 相对他父级容器的大小以及位置,用于判断多点元素的活动范围,
如果范围是全屏的话 则无需传该参数,进行相应修改即可
最后是效果图:
demo 下载地址:http://download.csdn.net/detail/wangrenzhu2011/4420853