从以编程方式生成的子元素访问放置在父元素中的 InkToolbar
Access InkToolbar placed in parent element from programmatically generated child elements
我有一个 UserControl
,其中包含一个 InkToolbar
。在此控件中,我根据用户输入生成了另一组 UserControls
。在每个以编程方式生成的控件中,都包含一个 InkCanvas
.
这是父级 UserControl
& 后面的代码。
Main.xaml
<UserControl
x:Class="uwp.Main"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:uwp_mvvm"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
d:DesignHeight="300"
d:DesignWidth="400">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition />
</Grid.RowDefinitions>
<StackPanel Orientation="Horizontal" Grid.Row="0">
<InkToolbar x:Name="InkToolbar" Background="Black" Margin="10 0 0 0" VerticalAlignment="Center"/>
</StackPanel>
<ScrollViewer ZoomMode="Enabled" Background="DarkGray" x:Name="ScrollViewer" VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto" MinZoomFactor="0.25" Width="Auto" Height="Auto" MaxZoomFactor="4" Grid.Row="1">
<StackPanel Orientation="Vertical" VerticalAlignment="Center" HorizontalAlignment="Center">
<ItemsControl x:Name="PagesItemsControl" ItemsSource="{x:Bind Pages, Mode=OneWay}" HorizontalAlignment="Center" VerticalAlignment="Top">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<WrapGrid Orientation="Vertical"/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<local:TestControl x:Name="TestControl" Page="{Binding}" Margin="4 4" InkToolbarControl="{Binding Path=InkToolbar, ElementName=InkToolbar}" />
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</StackPanel>
</ScrollViewer>
</Grid>
</UserControl>
Main.xaml.cs
public sealed partial class MainViewer : UserControl
{
public MainViewer()
{
this.InitializeComponent();
}
private void EventTriggerChanged(object sender, PropertyChangedEventArgs e)
{
var trigger = sender as EventTriggerTestControl;
if (trigger != null)
RaiseChanged(e.PropertyName);
}
public event PropertyChangedEventHandler PropertyChanged;
private void RaiseChanged(string propName)
{
if (PropertyChanged != null)
PropertyChanged.Invoke(this, new PropertyChangedEventArgs(propName));
}
private PdfDocument pdfDocument = null;
private string password = string.Empty;
private ObservableCollection<PdfPage> pages = new ObservableCollection<PdfPage>();
public string Password
{
private get { return password; }
set { if (value != password) { password = value; } }
}
public ObservableCollection<PdfPage> Pages
{
get { return pages; }
set { if (value != pages) { pages = value; } }
}
public StorageFile File
{
get { return (StorageFile)GetValue(FileProperty); }
set { SetValue(FileProperty, value); }
}
public static readonly DependencyProperty FileProperty =
DependencyProperty.Register(nameof(File), typeof(StorageFile), typeof(MainViewer), new PropertyMetadata(null, new PropertyChangedCallback(OnDocumentChanged)));
private static void OnDocumentChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (object.Equals(e.NewValue, e.OldValue) || e.NewValue is null)
return;
d.RegisterPropertyChangedCallback(FileProperty, CaptureDocument);
}
private async static void CaptureDocument(DependencyObject sender, DependencyProperty dp) => await (sender as MainViewer).OpenFileAsync(sender.GetValue(dp) as StorageFile);
private async Task OpenFileAsync(StorageFile file)
{
try
{
if (file == null)
throw new ArgumentNullException(nameof(file));
var files = await ApplicationData.Current.LocalFolder.GetFilesAsync(CommonFileQuery.OrderByName);
if (files.Where(x => x.Name == file.Name).ToList().Count == 0)
await file.CopyAsync(ApplicationData.Current.LocalFolder, file.Name, NameCollisionOption.ReplaceExisting);
file = await ApplicationData.Current.LocalFolder.GetFileAsync(file.Name);
pdfDocument = new PdfDocument(file.Path, Password);
pdfDocument.Pages.ToList().ForEach(x => Pages.Add(x));
}
catch (Exception ex) { throw ex; }
}
}
我想使用 TestControl
中的父控件中的 InkToolbar
TestControl.xaml
<UserControl
x:Class="uwp.TestControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="using:uwp_mvvm.ViewModels" xmlns:converter="using:uwp_mvvm"
mc:Ignorable="d"
d:DesignHeight="300"
d:DesignWidth="400">
<UserControl.Resources>
<converter:BoolToVisibilityConverter x:Key="BoolToVisibilityConverter" />
</UserControl.Resources>
<Grid x:Name="Viewport" VerticalAlignment="Top" HorizontalAlignment="Center">
<Border x:Name="ViewportBorder" Background="White" BorderThickness="2, 2, 2, 2" BorderBrush="#FF353334" />
<Image x:Name="Image" Margin="0" UseLayoutRounding="True" ManipulationMode="Scale"/>
<Canvas x:Name="SelectionCanvas" CompositeMode="MinBlend" Opacity="1" />
<InkCanvas x:Name="InkCanvas" />
</Grid>
</UserControl>
TastControl.xaml.cs
public sealed partial class TestControl : UserControl
{
private const float DPI = 256;
public PdfPage Page
{
get { return (PdfPage)GetValue(PageProperty); }
set { SetValue(PageProperty, value); }
}
public static readonly DependencyProperty PageProperty =
DependencyProperty.Register(nameof(Page), typeof(PdfPage), typeof(TestControl), new PropertyMetadata(null, new PropertyChangedCallback(OnPageChanged)));
private static void OnPageChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (object.Equals(e.NewValue, e.OldValue) || e.NewValue is null)
return;
d.RegisterPropertyChangedCallback(PageProperty, CapturePage);
}
private static void CapturePage(DependencyObject sender, DependencyProperty dp) => (sender as TestControl).RenderPage(sender.GetValue(dp) as PdfPage);
public InkToolbar InkToolbarControl
{
get { return (InkToolbar)GetValue(InkToolbarControlProperty); }
set { SetValue(InkToolbarControlProperty, value); }
}
public static readonly DependencyProperty InkToolbarControlProperty =
DependencyProperty.Register(nameof(InkToolbarControl), typeof(InkToolbar), typeof(TestControl), new PropertyMetadata(null));
public TestControl()
{
this.InitializeComponent();
ConfigureInkCanvas();
}
private void ConfigureInkCanvas()
{
InkCanvas.InkPresenter.InputDeviceTypes = CoreInputDeviceTypes.Mouse | CoreInputDeviceTypes.Pen | CoreInputDeviceTypes.Touch;
InkCanvas.InkPresenter.InputProcessingConfiguration.Mode = InkInputProcessingMode.None;
InkCanvas.InkPresenter.UpdateDefaultDrawingAttributes(
new InkDrawingAttributes
{
IgnorePressure = false,
FitToCurve = true,
Color = Colors.Black,
PenTip = PenTipShape.Circle
});
InkCanvas.InkPresenter.UnprocessedInput.PointerEntered -= InkCanvasUnprocessedInputPointerEntered;
InkCanvas.InkPresenter.UnprocessedInput.PointerEntered += InkCanvasUnprocessedInputPointerEntered;
InkCanvas.InkPresenter.UnprocessedInput.PointerExited -= InkCanvasUnprocessedInputPointerExited;
InkCanvas.InkPresenter.UnprocessedInput.PointerExited += InkCanvasUnprocessedInputPointerExited;
}
private void InkCanvasUnprocessedInputPointerExited(InkUnprocessedInput sender, PointerEventArgs args)
{
//InkCanvas.InkPresenter.InputProcessingConfiguration.Mode = InkInputProcessingMode.Inking;
//InkToolbarControl.TargetInkCanvas = InkCanvas;
}
private void InkCanvasUnprocessedInputPointerEntered(InkUnprocessedInput sender, PointerEventArgs args)
{
//InkCanvas.InkPresenter.InputProcessingConfiguration.Mode = InkInputProcessingMode.None;
//InkToolbarControl.TargetInkCanvas = null;
}
private void RenderPage(PdfPage page, float dpi = DPI)
{
if (page is null)
return;
this.DataContext = page;
var width = (DataContext as PdfPage).Width;
var height = (DataContext as PdfPage).Height;
var writableBitmap = new WriteableBitmap((int)(width / 72f * dpi), (int)(height / 72f * dpi));
(DataContext as PdfPage).Render(writableBitmap, PageOrientations.Normal, RenderingFlags.Annotations);
Image.Width = width;
Image.Height = height;
Image.Source = writableBitmap;
SelectionCanvas.Width = width;
SelectionCanvas.Height = height;
InkCanvas.Width = width;
InkCanvas.Height = height;
Canvas.SetZIndex(Image, 0);
ConfigureInkCanvas();
}
}
我尝试使用 DependencyProperty
将 InkToolbar
发送到 TestControl
但它似乎没有用。
有人可以帮我解决这个问题吗?我不确定是否也可以像这样设置 TargetInkCanvas
。因此,如果对此有更好的方法,我们也将不胜感激。
非常感谢任何帮助。谢谢。
Access InkToolbar placed in parent element from programmatically generated child elements
以上使用 DependencyProperty 传递父级的解决方案 InkToolBar
是正确的。但是,您为 InkToolbarControl
属性.
绑定了错误的值
请直接绑定不带路径的ElementName
<local:TestControl
x:Name="TestControl"
Margin="4,4"
InkToolbarControl="{Binding ElementName=InkToolbar}" />
然后更新 InkCanvasUnprocessedInputPointerExited
和 InkCanvasUnprocessedInputPointerEntered
流程逻辑。
private void InkCanvasUnprocessedInputPointerExited(InkUnprocessedInput sender, PointerEventArgs args)
{
InkCanvas.InkPresenter.InputProcessingConfiguration.Mode = InkInputProcessingMode.Inking;
InkToolbarControl.TargetInkCanvas = null;
}
private void InkCanvasUnprocessedInputPointerEntered(InkUnprocessedInput sender, PointerEventArgs args)
{
InkCanvas.InkPresenter.InputProcessingConfiguration.Mode = InkInputProcessingMode.None;
InkToolbarControl.TargetInkCanvas = InkCanvas;
}
我有一个 UserControl
,其中包含一个 InkToolbar
。在此控件中,我根据用户输入生成了另一组 UserControls
。在每个以编程方式生成的控件中,都包含一个 InkCanvas
.
这是父级 UserControl
& 后面的代码。
Main.xaml
<UserControl
x:Class="uwp.Main"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:uwp_mvvm"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
d:DesignHeight="300"
d:DesignWidth="400">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition />
</Grid.RowDefinitions>
<StackPanel Orientation="Horizontal" Grid.Row="0">
<InkToolbar x:Name="InkToolbar" Background="Black" Margin="10 0 0 0" VerticalAlignment="Center"/>
</StackPanel>
<ScrollViewer ZoomMode="Enabled" Background="DarkGray" x:Name="ScrollViewer" VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto" MinZoomFactor="0.25" Width="Auto" Height="Auto" MaxZoomFactor="4" Grid.Row="1">
<StackPanel Orientation="Vertical" VerticalAlignment="Center" HorizontalAlignment="Center">
<ItemsControl x:Name="PagesItemsControl" ItemsSource="{x:Bind Pages, Mode=OneWay}" HorizontalAlignment="Center" VerticalAlignment="Top">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<WrapGrid Orientation="Vertical"/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<local:TestControl x:Name="TestControl" Page="{Binding}" Margin="4 4" InkToolbarControl="{Binding Path=InkToolbar, ElementName=InkToolbar}" />
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</StackPanel>
</ScrollViewer>
</Grid>
</UserControl>
Main.xaml.cs
public sealed partial class MainViewer : UserControl
{
public MainViewer()
{
this.InitializeComponent();
}
private void EventTriggerChanged(object sender, PropertyChangedEventArgs e)
{
var trigger = sender as EventTriggerTestControl;
if (trigger != null)
RaiseChanged(e.PropertyName);
}
public event PropertyChangedEventHandler PropertyChanged;
private void RaiseChanged(string propName)
{
if (PropertyChanged != null)
PropertyChanged.Invoke(this, new PropertyChangedEventArgs(propName));
}
private PdfDocument pdfDocument = null;
private string password = string.Empty;
private ObservableCollection<PdfPage> pages = new ObservableCollection<PdfPage>();
public string Password
{
private get { return password; }
set { if (value != password) { password = value; } }
}
public ObservableCollection<PdfPage> Pages
{
get { return pages; }
set { if (value != pages) { pages = value; } }
}
public StorageFile File
{
get { return (StorageFile)GetValue(FileProperty); }
set { SetValue(FileProperty, value); }
}
public static readonly DependencyProperty FileProperty =
DependencyProperty.Register(nameof(File), typeof(StorageFile), typeof(MainViewer), new PropertyMetadata(null, new PropertyChangedCallback(OnDocumentChanged)));
private static void OnDocumentChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (object.Equals(e.NewValue, e.OldValue) || e.NewValue is null)
return;
d.RegisterPropertyChangedCallback(FileProperty, CaptureDocument);
}
private async static void CaptureDocument(DependencyObject sender, DependencyProperty dp) => await (sender as MainViewer).OpenFileAsync(sender.GetValue(dp) as StorageFile);
private async Task OpenFileAsync(StorageFile file)
{
try
{
if (file == null)
throw new ArgumentNullException(nameof(file));
var files = await ApplicationData.Current.LocalFolder.GetFilesAsync(CommonFileQuery.OrderByName);
if (files.Where(x => x.Name == file.Name).ToList().Count == 0)
await file.CopyAsync(ApplicationData.Current.LocalFolder, file.Name, NameCollisionOption.ReplaceExisting);
file = await ApplicationData.Current.LocalFolder.GetFileAsync(file.Name);
pdfDocument = new PdfDocument(file.Path, Password);
pdfDocument.Pages.ToList().ForEach(x => Pages.Add(x));
}
catch (Exception ex) { throw ex; }
}
}
我想使用 TestControl
InkToolbar
TestControl.xaml
<UserControl
x:Class="uwp.TestControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="using:uwp_mvvm.ViewModels" xmlns:converter="using:uwp_mvvm"
mc:Ignorable="d"
d:DesignHeight="300"
d:DesignWidth="400">
<UserControl.Resources>
<converter:BoolToVisibilityConverter x:Key="BoolToVisibilityConverter" />
</UserControl.Resources>
<Grid x:Name="Viewport" VerticalAlignment="Top" HorizontalAlignment="Center">
<Border x:Name="ViewportBorder" Background="White" BorderThickness="2, 2, 2, 2" BorderBrush="#FF353334" />
<Image x:Name="Image" Margin="0" UseLayoutRounding="True" ManipulationMode="Scale"/>
<Canvas x:Name="SelectionCanvas" CompositeMode="MinBlend" Opacity="1" />
<InkCanvas x:Name="InkCanvas" />
</Grid>
</UserControl>
TastControl.xaml.cs
public sealed partial class TestControl : UserControl
{
private const float DPI = 256;
public PdfPage Page
{
get { return (PdfPage)GetValue(PageProperty); }
set { SetValue(PageProperty, value); }
}
public static readonly DependencyProperty PageProperty =
DependencyProperty.Register(nameof(Page), typeof(PdfPage), typeof(TestControl), new PropertyMetadata(null, new PropertyChangedCallback(OnPageChanged)));
private static void OnPageChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (object.Equals(e.NewValue, e.OldValue) || e.NewValue is null)
return;
d.RegisterPropertyChangedCallback(PageProperty, CapturePage);
}
private static void CapturePage(DependencyObject sender, DependencyProperty dp) => (sender as TestControl).RenderPage(sender.GetValue(dp) as PdfPage);
public InkToolbar InkToolbarControl
{
get { return (InkToolbar)GetValue(InkToolbarControlProperty); }
set { SetValue(InkToolbarControlProperty, value); }
}
public static readonly DependencyProperty InkToolbarControlProperty =
DependencyProperty.Register(nameof(InkToolbarControl), typeof(InkToolbar), typeof(TestControl), new PropertyMetadata(null));
public TestControl()
{
this.InitializeComponent();
ConfigureInkCanvas();
}
private void ConfigureInkCanvas()
{
InkCanvas.InkPresenter.InputDeviceTypes = CoreInputDeviceTypes.Mouse | CoreInputDeviceTypes.Pen | CoreInputDeviceTypes.Touch;
InkCanvas.InkPresenter.InputProcessingConfiguration.Mode = InkInputProcessingMode.None;
InkCanvas.InkPresenter.UpdateDefaultDrawingAttributes(
new InkDrawingAttributes
{
IgnorePressure = false,
FitToCurve = true,
Color = Colors.Black,
PenTip = PenTipShape.Circle
});
InkCanvas.InkPresenter.UnprocessedInput.PointerEntered -= InkCanvasUnprocessedInputPointerEntered;
InkCanvas.InkPresenter.UnprocessedInput.PointerEntered += InkCanvasUnprocessedInputPointerEntered;
InkCanvas.InkPresenter.UnprocessedInput.PointerExited -= InkCanvasUnprocessedInputPointerExited;
InkCanvas.InkPresenter.UnprocessedInput.PointerExited += InkCanvasUnprocessedInputPointerExited;
}
private void InkCanvasUnprocessedInputPointerExited(InkUnprocessedInput sender, PointerEventArgs args)
{
//InkCanvas.InkPresenter.InputProcessingConfiguration.Mode = InkInputProcessingMode.Inking;
//InkToolbarControl.TargetInkCanvas = InkCanvas;
}
private void InkCanvasUnprocessedInputPointerEntered(InkUnprocessedInput sender, PointerEventArgs args)
{
//InkCanvas.InkPresenter.InputProcessingConfiguration.Mode = InkInputProcessingMode.None;
//InkToolbarControl.TargetInkCanvas = null;
}
private void RenderPage(PdfPage page, float dpi = DPI)
{
if (page is null)
return;
this.DataContext = page;
var width = (DataContext as PdfPage).Width;
var height = (DataContext as PdfPage).Height;
var writableBitmap = new WriteableBitmap((int)(width / 72f * dpi), (int)(height / 72f * dpi));
(DataContext as PdfPage).Render(writableBitmap, PageOrientations.Normal, RenderingFlags.Annotations);
Image.Width = width;
Image.Height = height;
Image.Source = writableBitmap;
SelectionCanvas.Width = width;
SelectionCanvas.Height = height;
InkCanvas.Width = width;
InkCanvas.Height = height;
Canvas.SetZIndex(Image, 0);
ConfigureInkCanvas();
}
}
我尝试使用 DependencyProperty
将 InkToolbar
发送到 TestControl
但它似乎没有用。
有人可以帮我解决这个问题吗?我不确定是否也可以像这样设置 TargetInkCanvas
。因此,如果对此有更好的方法,我们也将不胜感激。
非常感谢任何帮助。谢谢。
Access InkToolbar placed in parent element from programmatically generated child elements
以上使用 DependencyProperty 传递父级的解决方案 InkToolBar
是正确的。但是,您为 InkToolbarControl
属性.
请直接绑定不带路径的ElementName
<local:TestControl
x:Name="TestControl"
Margin="4,4"
InkToolbarControl="{Binding ElementName=InkToolbar}" />
然后更新 InkCanvasUnprocessedInputPointerExited
和 InkCanvasUnprocessedInputPointerEntered
流程逻辑。
private void InkCanvasUnprocessedInputPointerExited(InkUnprocessedInput sender, PointerEventArgs args)
{
InkCanvas.InkPresenter.InputProcessingConfiguration.Mode = InkInputProcessingMode.Inking;
InkToolbarControl.TargetInkCanvas = null;
}
private void InkCanvasUnprocessedInputPointerEntered(InkUnprocessedInput sender, PointerEventArgs args)
{
InkCanvas.InkPresenter.InputProcessingConfiguration.Mode = InkInputProcessingMode.None;
InkToolbarControl.TargetInkCanvas = InkCanvas;
}