public void Load(IPdfSource source, string password = null)
{
this.scrollViewer = this.ChildOfType <ScrollViewer>();
this.imageProvider = new PdfImageProvider(source, this.parent.TotalPages,
new PageDisplaySettings(this.parent.GetPagesPerRow(), this.parent.ViewType, this.parent.HorizontalMargin, this.parent.Rotation), false, password);
if (scrollViewer != null)
{
scrollViewer.RemoveHandler(UIElement.MouseWheelEvent, new MouseWheelEventHandler(this.OnScrollWheel));
scrollViewer.AddHandler(UIElement.MouseWheelEvent, new MouseWheelEventHandler(this.OnScrollWheel), true);
}
this.CurrentPageIndex = 0;
if (this.scrollViewer != null)
{
this.scrollViewer.Visibility = System.Windows.Visibility.Visible;
}
if (this.parent.ZoomType == ZoomType.Fixed)
{
this.SetItemsSource();
}
else if (this.parent.ZoomType == ZoomType.FitToHeight)
{
this.ZoomToHeight();
}
else if (this.parent.ZoomType == ZoomType.FitToWidth)
{
this.ZoomToWidth();
}
}
private void OnManipulationStarted(object sender, ManipulationStartedEventArgs e)
{
if (_scrollViewer.VerticalOffset <= 0.0)
{
_setup = true;
_scrollViewer.AddHandler(ManipulationDeltaEvent,
new EventHandler <ManipulationDeltaEventArgs>(
OnManipulationDelta), true);
_scrollViewer.ManipulationCompleted += OnManipulationCompleted;
}
}
private void ScrollViewerLoadedHandler(object sender, RoutedEventArgs e)
{
_scrollViewer = (ScrollViewer)sender;
_scrollViewer.ViewChanged += ViewChangedHandler;
_scrollViewer.AddHandler(PointerPressedEvent, new PointerEventHandler(PageViewControl_OnPointerPressed), true);
var zoomInButton = (Button)_scrollViewer.FindDescendantByName("zoomInButton");
var zoomOutButton = (Button)_scrollViewer.FindDescendantByName("zoomOutButton");
var zoomControlsContainer = (Panel)_scrollViewer.FindDescendantByName("zoomControlsContainer");
if (new MouseCapabilities().MousePresent == 0)
{
zoomControlsContainer.Visibility = Visibility.Collapsed;
}
zoomInButton.Click += ZoomInButtonClickHandler;
zoomOutButton.Click += ZoomOutButtonClickHandler;
}
/// <summary>
/// Invoked whenever application code or internal processes (such as a rebuilding
/// layout pass) call <see cref="OnApplyTemplate"/>. In simplest terms, this means the method
/// is called just before a UI element displays in an application. Override this
/// method to influence the default post-template logic of a class.
/// </summary>
protected override void OnApplyTemplate()
{
m_root = this.GetTemplateChild(PART_ROOT) as UIElement;
m_scroller = this.GetTemplateChild(PART_SCROLLER) as ScrollViewer;
m_scrollerContent = this.GetTemplateChild(PART_SCROLLER_CONTENT) as UIElement;
m_refreshIndicatorContainer = this.GetTemplateChild(PART_REFRESH_INDICATOR) as FrameworkElement;
m_defaultRefreshIndicatorTextBlock = this.GetTemplateChild(PART_DEFAULT_REFRESH_INDICATOR_CONTENT) as TextBlock;
if (m_root != null &&
m_scroller != null &&
m_scrollerContent != null &&
m_refreshIndicatorContainer != null)
{
m_scroller.DirectManipulationStarted += Scroller_DirectManipulationStarted;
m_scroller.DirectManipulationCompleted += Scroller_DirectManipulationCompleted;
m_scroller.ViewChanged += Scroller_ViewChanged;
m_scroller.AddHandler(UIElement.PointerPressedEvent, new PointerEventHandler(Scroller_PointerPressed), true);
// In AutoRefresh mode, zoom factors smaller or larger than 1.0 are not supported.
if (this.AutoRefresh)
{
m_scroller.MinZoomFactor = 1.0f;
m_scroller.MaxZoomFactor = 1.0f;
m_scroller.ZoomMode = ZoomMode.Disabled;
}
m_refreshIndicatorContainer.SizeChanged += RefreshIndicatorContainer_SizeChanged;
}
if (m_defaultRefreshIndicatorTextBlock != null)
{
m_defaultRefreshIndicatorTextBlock.Visibility = this.RefreshIndicatorContent == null ? Visibility.Visible : Visibility.Collapsed;
}
base.OnApplyTemplate();
}
public MainWindow()
{
InitializeComponent();
Random rand = new Random();
StackPanel sp = new StackPanel();
for (int i = 0; i < 20; i++)
{
Button btn = new Button();
btn.HorizontalAlignment = HorizontalAlignment.Center;
btn.Margin = new Thickness(5);
btn.FontSize += rand.Next(10);
btn.Name = ((char)('A' + i)).ToString();
btn.Content = $"Button {btn.Name} says 'Click me'";
//btn.Click += Btn_Click;
sp.Children.Add(btn);
}
sp.HorizontalAlignment = HorizontalAlignment.Center;
//sp.AddHandler(Button.ClickEvent, new RoutedEventHandler(Btn_Click));
ScrollViewer scroll = new ScrollViewer();
scroll.Content = sp;
scroll.AddHandler(Button.ClickEvent, new RoutedEventHandler(Btn_Click));
this.MaxHeight = 500;
this.SizeToContent = SizeToContent.WidthAndHeight;
this.ResizeMode = ResizeMode.CanMinimize;
this.Content = scroll;
//sp.Children[5]
//sp.Children.IndexOf(btnC)
}
