internal WebViewBackend (SWC.WebBrowser browser)
{
view = browser;
view.Navigating += HandleNavigating;
view.Navigated += HandleNavigated;
view.LoadCompleted += HandleLoadCompleted;
Widget = view;
}
public SelectionChangedInhibitor(WPFControls.TreeView treeView)
{
this.Target = treeView;
OriginalIsSelectionChangeActiveValue = (bool)IsSelectionChangeActiveProperty.GetValue(Target, null);
//# suppress selection change notification
IsSelectionChangeActiveProperty.SetValue(Target, true, null);
}
protected override void OnTemplateChanged(SWC.ControlTemplate oldTemplate, SWC.ControlTemplate newTemplate)
{
base.OnTemplateChanged(oldTemplate, newTemplate);
UpdateTextBox();
}
private void OnSelectionChanged(object sender, selection.SelectionChangedEventArgs e)
{
var mainContainer = this.SelectedItem as MainContainerShapeBase;
if (e.AddedItems.Count > 0 && this.manipulationAdorner != null && mainContainer != null)
{
this.manipulationAdorner.AdditionalHandlersVisibility = System.Windows.Visibility.Visible;
this.UpdateHandlers(mainContainer);
}
else
{
this.manipulationAdorner.AdditionalHandlersVisibility = System.Windows.Visibility.Collapsed;
}
}
internal WebViewBackend(SWC.WebBrowser browser)
{
Widget = browser;
}
public static void SetCancelNextVerticalScrollEvent(WPFControls.TreeView element, bool value)
{
element.SetValue(CancelNextVerticalScrollEventProperty, value);
}
public static void SetPreventAutomaticVerticalScrolling(WPFControls.TreeView element, bool value)
{
element.SetValue(PreventAutomaticVerticalScrollingProperty, value);
}
static void UpdatePreventAutomaticVerticalScrollingSate(WPFControls.TreeView tv, bool isEnabled)
{
if (isEnabled)
{
var scrollViewer = tv.FindVisualDescendant<WPFControls.ScrollViewer>();
if (scrollViewer == null)
return;
scrollViewer.ScrollChanged += scrollViewer_VerticalScrollChanged;
tv.RequestBringIntoView += tv_VerticalRequestBringIntoView;
}
else
{
var scrollViewer = tv.FindVisualDescendant<WPFControls.ScrollViewer>();
if (scrollViewer == null)
return;
scrollViewer.ScrollChanged -= scrollViewer_VerticalScrollChanged;
tv.RequestBringIntoView -= tv_VerticalRequestBringIntoView;
}
}
public static void SetSelectedItems(WPFControls.TreeView element, List<WPFControls.TreeViewItem> value)
{
element.SetValue(SelectedItemsProperty, value);
}
private static bool TryGetNewBlockSelectionDetails(
WPFControls.TreeView treeView,
IEnumerable<WPFControls.TreeViewItem> alreadySelectedItems,
WPFControls.TreeViewItem newlySelectedItem,
out int blockSelectionStartIndex,
out int blockSelectionEndIndex,
out WPFControls.TreeViewItem parentTreeViewItem)
{
blockSelectionStartIndex = -1;
blockSelectionEndIndex = -1;
var parentTvi = newlySelectedItem.FindVisualParent<TreeViewItem>();
parentTreeViewItem = parentTvi;
if (parentTvi == null)
return false;
var hasSelectedItemsFromDifferentParent =
(from i in alreadySelectedItems
where i.FindVisualParent<TreeViewItem>() != parentTvi
select i).Any();
if (!hasSelectedItemsFromDifferentParent)
{
var initiallySelectedItem = GetInitiallySelectedItem(treeView);
// shift pressed but this is a first item selected, so there's no initally selected item yet
if (initiallySelectedItem == null)
{
return false;
}
var initiallySelectedIndex =
parentTvi.ItemContainerGenerator.IndexFromContainer(initiallySelectedItem);
var newSelectedIndex = parentTvi.ItemContainerGenerator.IndexFromContainer(newlySelectedItem);
if (initiallySelectedIndex == -1 || newSelectedIndex == -1)
return false;
blockSelectionStartIndex = Math.Min(initiallySelectedIndex, newSelectedIndex);
blockSelectionEndIndex = Math.Max(initiallySelectedIndex, newSelectedIndex);
return true;
}
return false;
}
public static bool GetAllowMultiSelection(WPFControls.TreeView element)
{
return (bool)element.GetValue(AllowMultiSelectionProperty);
}
public static void SetAllowMultiSelection(WPFControls.TreeView element, bool value)
{
element.SetValue(AllowMultiSelectionProperty, value);
}
static void HandlePreviewSelectionEvent(WPFControls.TreeView tv, TreeViewItem tvi, out bool isEventHandled)
{
isEventHandled = false;
if (tvi.IsSelected)
{
//# Item has been previously selected (we're in preview event and it is already selected)
var allowMultiSelection = GetAllowMultiSelection(tv);
var selectedItems = GetSelectedItems(tv);
if (allowMultiSelection)
{
if ((Keyboard.IsKeyDown(Key.LeftCtrl) || Keyboard.IsKeyDown(Key.RightCtrl)))
{
//# Ctrl pressed and item has been previously selected (IsSelected == true) => Unselect this item
selectedItems.Remove(tvi);
tvi.IsSelected = false;
isEventHandled = true;
return;
}
if (Keyboard.IsKeyDown(Key.LeftShift) || Keyboard.IsKeyDown(Key.RightShift))
{
//# Shift pressed - block selection
//# Item has been previously selected (IsSelected == true) => update selection range
int blockSelectionStartIndex = -1;
int blockSelectionEndIndex = -1;
WPFControls.TreeViewItem parentTvi = null;
if (!TryGetNewBlockSelectionDetails(tv, selectedItems, tvi, out blockSelectionStartIndex, out blockSelectionEndIndex, out parentTvi))
{
//# this is not a valid block selection, clear previous selection data
selectedItems.Clear();
selectedItems.Add(tvi);
isEventHandled = false;
return;
}
using (new SelectionChangedInhibitor(tv))
{
var removedItems =
(from si in selectedItems
let index = parentTvi.ItemContainerGenerator.IndexFromContainer(si)
where index < blockSelectionStartIndex || index > blockSelectionEndIndex
select si)
.ToArray();
foreach (var i in removedItems)
{
i.IsSelected = false;
selectedItems.Remove(i);
}
for (var i = blockSelectionStartIndex; i <= blockSelectionEndIndex; i++)
{
//# mark all selected items as selected
var tvi2 = (parentTvi.ItemContainerGenerator.ContainerFromIndex(i) as TreeViewItem);
tvi2.IsSelected = true;
selectedItems.Add(tvi2);
}
}
isEventHandled = true;
return;
}
}
if (!allowMultiSelection || !isEventHandled)
{
if (selectedItems.Count > 0)
{
// make new selected item the only selection
using (new SelectionChangedInhibitor(tv))
{
foreach (var i in selectedItems)
i.IsSelected = false;
}
selectedItems.Clear();
selectedItems.Add(tvi);
SetInitiallySelectedItem(tv, tvi);
tvi.IsSelected = true;
}
}
}
else
{
// noting to do here for now
}
}
protected override void OnSelectionChanged (SWC.SelectionChangedEventArgs e)
{
base.OnSelectionChanged (e);
OnTextChanged (EventArgs.Empty);
}
public static void SetOriginalVerticalOffset(WPFControls.TreeView element, double value)
{
element.SetValue(OriginalVerticalOffsetProperty, value);
}
public static double GetOriginalVerticalOffset(WPFControls.TreeView element)
{
return (double)element.GetValue(OriginalVerticalOffsetProperty);
}
public static List<WPFControls.TreeViewItem> GetSelectedItems(WPFControls.TreeView element)
{
return (List<WPFControls.TreeViewItem>)element.GetValue(SelectedItemsProperty);
}
static void scrollViewer_VerticalScrollChanged(object sender, WPFControls.ScrollChangedEventArgs e)
{
var sv = sender as WPFControls.ScrollViewer;
var tv = sv.FindVisualParent<WPFControls.TreeView>();
if (tv == null)
return;
if (!GetCancelNextVerticalScrollEvent(tv))
{
SetCancelNextVerticalScrollEvent(tv, false);
return;
}
var originalVerticalOffset = GetOriginalVerticalOffset(tv);
if (originalVerticalOffset != sv.VerticalOffset)
{
sv.ScrollToVerticalOffset(GetOriginalVerticalOffset(tv));
}
SetCancelNextVerticalScrollEvent(tv, false);
}
public static void SetInitiallySelectedItem(WPFControls.TreeView element, WPFControls.TreeViewItem value)
{
element.SetValue(InitiallySelectedItem, value);
}
public static bool GetPreventAutomaticVerticalScrolling(WPFControls.TreeView element)
{
return (bool)element.GetValue(PreventAutomaticVerticalScrollingProperty);
}
public static WPFControls.TreeViewItem GetInitiallySelectedItem(WPFControls.TreeView element)
{
return (WPFControls.TreeViewItem) element.GetValue(InitiallySelectedItem);
}
public static bool GetCancelNextVerticalScrollEvent(WPFControls.TreeView element)
{
return (bool)element.GetValue(CancelNextVerticalScrollEventProperty);
}
/// <summary>
/// Creates image from canvas with map background.
/// </summary>
/// <param name="mapImage">Map image.</param>
/// <param name="canvas">Canvas to draw.</param>
/// <returns>Created image.</returns>
private Image _CreateImage(MapImage mapImage, SysControls.Canvas canvas)
{
Debug.Assert(null != mapImage);
Debug.Assert(null != canvas);
Image imageWithData = null;
RenderTargetBitmap bmp = null;
SysControls.Canvas outer = null;
Image sourceImage = null;
using (MemoryStream sourceStream = new MemoryStream((byte[])mapImage.ImageData))
sourceImage = Image.FromStream(sourceStream);
try
{
var bitmap = sourceImage as Bitmap;
Debug.Assert(null != bitmap);
ImageBrush imageBrush = _CreateImageBrush(bitmap);
outer = new SysControls.Canvas();
outer.Width = mapImage.ImageWidth;
outer.Height = mapImage.ImageHeight;
outer.Children.Add(canvas);
outer.Background = (ImageBrush)imageBrush.GetCurrentValueAsFrozen();
outer.Arrange(new Rect(0, 0, outer.Width, outer.Height));
bmp = new RenderTargetBitmap((int)outer.Width,
(int)outer.Height,
mapImage.ImageDPI,
mapImage.ImageDPI,
PixelFormats.Pbgra32);
bmp.Render(outer);
var encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(bmp));
using (MemoryStream stream = new MemoryStream())
{
encoder.Save(stream);
imageWithData = Image.FromStream(stream);
}
}
finally
{ // Clear and dispose all used stuff
if (outer != null)
{
outer.UpdateLayout();
outer.Children.Clear();
}
canvas.UpdateLayout();
foreach (object child in canvas.Children)
{
var symbolControl = child as SymbolControl;
if (symbolControl != null)
symbolControl.Template = null;
}
canvas.Children.Clear();
if (bmp != null)
bmp.Clear();
if (sourceImage != null)
sourceImage.Dispose();
}
return imageWithData;
}
private void SelectItemFromGenerator(C.ItemContainerGenerator rootItemItemContainerGenerator)
{
RadTreeMapItem russiaContainer = rootItemItemContainerGenerator.ContainerFromIndex(0) as RadTreeMapItem;
russiaContainer.IsSelected = true;
}
void cmb_PopupContentSelectionChanged(object sender, WinControls.SelectionChangedEventArgs e)
{
// При удалении будет RemovedItems содержать элементы.
item = e.AddedItems.Count > 0 ? e.AddedItems[0].ToString() : null;
}
