ClockController.Seek(TimeSpan, TimeSeekOrigin) Метод
Определение
Важно!
Некоторые сведения относятся к предварительной версии продукта, в которую до выпуска могут быть внесены существенные изменения. Майкрософт не предоставляет никаких гарантий, явных или подразумеваемых, относительно приведенных здесь сведений.
Выполняет поиск целевого объекта Clock по указанной величине при следующем тике. Если часы целевого объекта остановлены, поиск делает их активными.
public:
void Seek(TimeSpan offset, System::Windows::Media::Animation::TimeSeekOrigin origin);public void Seek (TimeSpan offset, System.Windows.Media.Animation.TimeSeekOrigin origin);member this.Seek : TimeSpan * System.Windows.Media.Animation.TimeSeekOrigin -> unitPublic Sub Seek (offset As TimeSpan, origin As TimeSeekOrigin)Параметры
- offset
- TimeSpan
Смещение поиска, измеряемое по часам целевого объекта. Это смещение относится к BeginTime или Duration часов в зависимости от значения origin.
- origin
- TimeSeekOrigin
Значение, которое указывает, относится ли указанное смещение к BeginTime или Duration часов целевого объекта.
Примеры
В следующем примере показано, как искать с помощью ClockController.
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Data;
using System.Xml;
using System.Configuration;
namespace SDKSample
{
/// <summary>
/// Shows how to interactively control a clock.
/// </summary>
public class SeekAlignedToLastTickExample : Page
{
private AnimationClock myClock;
private TextBlock currentTimeIndicator;
private TextBox seekDestination;
private TextBlock rectangleWidthIndicator;
private Rectangle myRectangle;
public SeekAlignedToLastTickExample()
{
this.WindowTitle = "Controlling a Storyboard";
this.Background = Brushes.White;
StackPanel myStackPanel = new StackPanel();
myStackPanel.Margin = new Thickness(20);
// Create a rectangle.
myRectangle = new Rectangle();
myRectangle.Width = 100;
myRectangle.Height = 20;
myRectangle.Margin = new Thickness(12,0,0,5);
myRectangle.Fill = new SolidColorBrush(Color.FromArgb(170, 51, 51, 255));
myRectangle.HorizontalAlignment = HorizontalAlignment.Left;
myStackPanel.Children.Add(myRectangle);
//
// Create an animation and a storyboard to animate the
// rectangle.
//
DoubleAnimation myDoubleAnimation =
new DoubleAnimation(100, 500, new Duration(TimeSpan.FromSeconds(60)));
myClock = myDoubleAnimation.CreateClock();
myRectangle.ApplyAnimationClock(Rectangle.WidthProperty, myClock);
myClock.Controller.Stop();
//
// Create some buttons to control the storyboard
// and a panel to contain them.
//
StackPanel buttonPanel = new StackPanel();
buttonPanel.Orientation = Orientation.Horizontal;
Button beginButton = new Button();
beginButton.Content = "Begin";
beginButton.Click += new RoutedEventHandler(beginButton_Clicked);
buttonPanel.Children.Add(beginButton);
Button pauseButton = new Button();
pauseButton.Content = "Pause";
pauseButton.Click +=new RoutedEventHandler(pauseButton_Clicked);
buttonPanel.Children.Add(pauseButton);
Button resumeButton = new Button();
resumeButton.Content = "Resume";
resumeButton.Click +=new RoutedEventHandler(resumeButton_Clicked);
buttonPanel.Children.Add(resumeButton);
Button skipToFillButton = new Button();
skipToFillButton.Content = "Skip to Fill";
skipToFillButton.Click +=new RoutedEventHandler(skipToFillButton_Clicked);
buttonPanel.Children.Add(skipToFillButton);
Button setSpeedRatioButton = new Button();
setSpeedRatioButton.Content = "Triple Speed";
setSpeedRatioButton.Click +=new RoutedEventHandler(setSpeedRatioButton_Clicked);
buttonPanel.Children.Add(setSpeedRatioButton);
Button stopButton = new Button();
stopButton.Content = "Stop";
stopButton.Click +=new RoutedEventHandler(stopButton_Clicked);
buttonPanel.Children.Add(stopButton);
Button removeButton = new Button();
removeButton.Content = "Remove";
removeButton.Click +=new RoutedEventHandler(removeButton_Clicked);
buttonPanel.Children.Add(removeButton);
myStackPanel.Children.Add(buttonPanel);
// Create some controls to display the
// storyboard's current time and the
// current width of the rectangle.
StackPanel seekPanel = new StackPanel();
seekPanel.Margin = new Thickness(10);
StackPanel aPanel = new StackPanel();
Label aLabel = new Label();
aPanel.Orientation = Orientation.Horizontal;
aLabel.Content = "Current Time: ";
aPanel.Children.Add(aLabel);
currentTimeIndicator = new TextBlock();
aPanel.Children.Add(currentTimeIndicator);
seekPanel.Children.Add(aPanel);
aPanel = new StackPanel();
aPanel.Orientation = Orientation.Horizontal;
aLabel = new Label();
aLabel.Content = "Rectangle Width: ";
aPanel.Children.Add(aLabel);
rectangleWidthIndicator = new TextBlock();
rectangleWidthIndicator.Text = myRectangle.Width.ToString();
aPanel.Children.Add(rectangleWidthIndicator);
seekPanel.Children.Add(aPanel);
// Create some controls to enable the
// user to specify a seek position.
aPanel = new StackPanel();
aPanel.Orientation = Orientation.Horizontal;
aLabel = new Label();
aLabel.Content = "Seek Offset: " ;
aPanel.Children.Add(aLabel);
seekDestination = new TextBox();
seekDestination.Text = "0";
aPanel.Children.Add(seekDestination);
seekPanel.Children.Add(aPanel);
Button seekButton = new Button();
seekButton.Content = "Seek";
seekButton.Click += new RoutedEventHandler(seekButton_Clicked);
seekPanel.Children.Add(seekButton);
Button seekAlignedToLastTickButton = new Button();
seekAlignedToLastTickButton.Content = "Seek Aligned to Last Tick";
seekAlignedToLastTickButton.Click += new RoutedEventHandler(seekAlignedToLastTickButton_Clicked);
seekPanel.Children.Add(seekAlignedToLastTickButton);
myStackPanel.Children.Add(seekPanel);
this.Content = myStackPanel;
myClock.CurrentTimeInvalidated += new EventHandler(myClock_CurrentTimeInvalidated);
}
// Begins the clock.
private void beginButton_Clicked(object sender, RoutedEventArgs args)
{
myClock.Controller.Begin();
}
// Pauses the clock.
private void pauseButton_Clicked(object sender, RoutedEventArgs args)
{
myClock.Controller.Pause();
}
// Resumes the clock.
private void resumeButton_Clicked(object sender, RoutedEventArgs args)
{
myClock.Controller.Resume();
}
// Advances the clock to its fill period.
private void skipToFillButton_Clicked(object sender, RoutedEventArgs args)
{
myClock.Controller.SkipToFill();
}
// Updates the clock's speed.
private void setSpeedRatioButton_Clicked(object sender, RoutedEventArgs args)
{
// Makes the clock progress three times as fast as normal.
myClock.Controller.SpeedRatio = 3;
}
// Stops the clock.
private void stopButton_Clicked(object sender, RoutedEventArgs args)
{
myClock.Controller.Stop();
}
// Removes the clock.
private void removeButton_Clicked(object sender, RoutedEventArgs args)
{
myClock.Controller.Remove();
}
private void seekButton_Clicked(object sender, RoutedEventArgs args)
{
try {
// The rectangle width will probably not be at its new
// value when this call is made, because the
// clock probably hasn't ticked yet.
TimeSpan seekTime = TimeSpan.Parse(seekDestination.Text);
myClock.Controller.Seek(seekTime, TimeSeekOrigin.BeginTime);
rectangleWidthIndicator.Text = myRectangle.Width.ToString();
}catch(FormatException ex)
{
MessageBox.Show("Invalid TimeSpan value.");
seekDestination.Focus();
}
}
private void seekAlignedToLastTickButton_Clicked(object sender, RoutedEventArgs args)
{
try {
// The rectangle width will be at its new
// value when this call is made, because SeekAlignedToLastTick
// operation immediately updates timeline and animation
// values.
TimeSpan seekTime = TimeSpan.Parse(seekDestination.Text);
myClock.Controller.SeekAlignedToLastTick(seekTime, TimeSeekOrigin.BeginTime);
rectangleWidthIndicator.Text = myRectangle.Width.ToString();
}catch(FormatException ex)
{
MessageBox.Show("Invalid TimeSpan value.");
seekDestination.Focus();
}
}
private void myClock_CurrentTimeInvalidated(object sender, EventArgs e)
{
currentTimeIndicator.Text = myClock.CurrentTime.ToString();
}
}
}
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Media
Imports System.Windows.Media.Animation
Imports System.Windows.Navigation
Imports System.Windows.Shapes
Imports System.Data
Imports System.Xml
Imports System.Configuration
Namespace SDKSample
''' <summary>
''' Shows how to interactively control a clock.
''' </summary>
Public Class SeekAlignedToLastTickExample
Inherits Page
Private myClock As AnimationClock
Private currentTimeIndicator As TextBlock
Private seekDestination As TextBox
Private rectangleWidthIndicator As TextBlock
Private myRectangle As Rectangle
Public Sub New()
Me.WindowTitle = "Controlling a Storyboard"
Me.Background = Brushes.White
Dim myStackPanel As New StackPanel()
myStackPanel.Margin = New Thickness(20)
' Create a rectangle.
myRectangle = New Rectangle()
With myRectangle
.Width = 100
.Height = 20
.Margin = New Thickness(12, 0, 0, 5)
.Fill = New SolidColorBrush(Color.FromArgb(170, 51, 51, 255))
.HorizontalAlignment = HorizontalAlignment.Left
End With
myStackPanel.Children.Add(myRectangle)
'
' Create an animation and a storyboard to animate the
' rectangle.
'
Dim myDoubleAnimation As New DoubleAnimation(100, 500, New Duration(TimeSpan.FromSeconds(60)))
myClock = myDoubleAnimation.CreateClock()
myRectangle.ApplyAnimationClock(Rectangle.WidthProperty, myClock)
myClock.Controller.Stop()
'
' Create some buttons to control the storyboard
' and a panel to contain them.
'
Dim buttonPanel As New StackPanel()
buttonPanel.Orientation = Orientation.Horizontal
Dim beginButton As New Button()
beginButton.Content = "Begin"
AddHandler beginButton.Click, AddressOf beginButton_Clicked
buttonPanel.Children.Add(beginButton)
Dim pauseButton As New Button()
pauseButton.Content = "Pause"
AddHandler pauseButton.Click, AddressOf pauseButton_Clicked
buttonPanel.Children.Add(pauseButton)
Dim resumeButton As New Button()
resumeButton.Content = "Resume"
AddHandler resumeButton.Click, AddressOf resumeButton_Clicked
buttonPanel.Children.Add(resumeButton)
Dim skipToFillButton As New Button()
skipToFillButton.Content = "Skip to Fill"
AddHandler skipToFillButton.Click, AddressOf skipToFillButton_Clicked
buttonPanel.Children.Add(skipToFillButton)
Dim setSpeedRatioButton As New Button()
setSpeedRatioButton.Content = "Triple Speed"
AddHandler setSpeedRatioButton.Click, AddressOf setSpeedRatioButton_Clicked
buttonPanel.Children.Add(setSpeedRatioButton)
Dim stopButton As New Button()
stopButton.Content = "Stop"
AddHandler stopButton.Click, AddressOf stopButton_Clicked
buttonPanel.Children.Add(stopButton)
Dim removeButton As New Button()
removeButton.Content = "Remove"
AddHandler removeButton.Click, AddressOf removeButton_Clicked
buttonPanel.Children.Add(removeButton)
myStackPanel.Children.Add(buttonPanel)
' Create some controls to display the
' storyboard's current time and the
' current width of the rectangle.
Dim seekPanel As New StackPanel()
seekPanel.Margin = New Thickness(10)
Dim aPanel As New StackPanel()
Dim aLabel As New Label()
aPanel.Orientation = Orientation.Horizontal
aLabel.Content = "Current Time: "
aPanel.Children.Add(aLabel)
currentTimeIndicator = New TextBlock()
aPanel.Children.Add(currentTimeIndicator)
seekPanel.Children.Add(aPanel)
aPanel = New StackPanel()
aPanel.Orientation = Orientation.Horizontal
aLabel = New Label()
aLabel.Content = "Rectangle Width: "
aPanel.Children.Add(aLabel)
rectangleWidthIndicator = New TextBlock()
rectangleWidthIndicator.Text = myRectangle.Width.ToString()
aPanel.Children.Add(rectangleWidthIndicator)
seekPanel.Children.Add(aPanel)
' Create some controls to enable the
' user to specify a seek position.
aPanel = New StackPanel()
aPanel.Orientation = Orientation.Horizontal
aLabel = New Label()
aLabel.Content = "Seek Offset: "
aPanel.Children.Add(aLabel)
seekDestination = New TextBox()
seekDestination.Text = "0"
aPanel.Children.Add(seekDestination)
seekPanel.Children.Add(aPanel)
Dim seekButton As New Button()
seekButton.Content = "Seek"
AddHandler seekButton.Click, AddressOf seekButton_Clicked
seekPanel.Children.Add(seekButton)
Dim seekAlignedToLastTickButton As New Button()
seekAlignedToLastTickButton.Content = "Seek Aligned to Last Tick"
AddHandler seekAlignedToLastTickButton.Click, AddressOf seekAlignedToLastTickButton_Clicked
seekPanel.Children.Add(seekAlignedToLastTickButton)
myStackPanel.Children.Add(seekPanel)
Me.Content = myStackPanel
AddHandler myClock.CurrentTimeInvalidated, AddressOf myClock_CurrentTimeInvalidated
End Sub
' Begins the clock.
Private Sub beginButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
myClock.Controller.Begin()
End Sub
' Pauses the clock.
Private Sub pauseButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
myClock.Controller.Pause()
End Sub
' Resumes the clock.
Private Sub resumeButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
myClock.Controller.Resume()
End Sub
' Advances the clock to its fill period.
Private Sub skipToFillButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
myClock.Controller.SkipToFill()
End Sub
' Updates the clock's speed.
Private Sub setSpeedRatioButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
' Makes the clock progress three times as fast as normal.
myClock.Controller.SpeedRatio = 3
End Sub
' Stops the clock.
Private Sub stopButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
myClock.Controller.Stop()
End Sub
' Removes the clock.
Private Sub removeButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
myClock.Controller.Remove()
End Sub
Private Sub seekButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
Try
' The rectangle width will probably not be at its new
' value when this call is made, because the
' clock probably hasn't ticked yet.
Dim seekTime As TimeSpan = TimeSpan.Parse(seekDestination.Text)
myClock.Controller.Seek(seekTime, TimeSeekOrigin.BeginTime)
rectangleWidthIndicator.Text = myRectangle.Width.ToString()
Catch ex As FormatException
MessageBox.Show("Invalid TimeSpan value.")
seekDestination.Focus()
End Try
End Sub
Private Sub seekAlignedToLastTickButton_Clicked(ByVal sender As Object, ByVal args As RoutedEventArgs)
Try
' The rectangle width will be at its new
' value when this call is made, because SeekAlignedToLastTick
' operation immediately updates timeline and animation
' values.
Dim seekTime As TimeSpan = TimeSpan.Parse(seekDestination.Text)
myClock.Controller.SeekAlignedToLastTick(seekTime, TimeSeekOrigin.BeginTime)
rectangleWidthIndicator.Text = myRectangle.Width.ToString()
Catch ex As FormatException
MessageBox.Show("Invalid TimeSpan value.")
seekDestination.Focus()
End Try
End Sub
Private Sub myClock_CurrentTimeInvalidated(ByVal sender As Object, ByVal e As EventArgs)
currentTimeIndicator.Text = myClock.CurrentTime.ToString()
End Sub
End Class
End Namespace
Комментарии
Операции поиска не учитывают SpeedRatio параметры или SlipBehavior временная шкала часов: часы обрабатываются так, как будто их временная шкала имеет SpeedRatio значение 1, а нет SlipBehavior.
Этот метод изменяет часы CurrentState на Active. Этот метод не влияет на дерево времени до следующей обработки деления. В качестве побочных эффектов соответствующие события также не будут вызываться до тех пор.
Поиск раскадровки активирует CurrentGlobalSpeedInvalidated события и CurrentStateInvalidated .
Если у целевых часов есть дочерние часы, их текущее время обновляется соответствующим образом.
Применяется к
См. также раздел
Совместная работа с нами на GitHub
Источник этого содержимого можно найти на GitHub, где также можно создавать и просматривать проблемы и запросы на вытягивание. Дополнительные сведения см. в нашем руководстве для участников.
