ScrollDirection?GetScrollDirection(HexMouseLocation mouseLoc, out TimeSpan interval)
{
// Give prio to scrolling up/down (more common than scrolling left/right)
if (mouseLoc.Point.Y < wpfHexView.ViewportTop)
{
interval = GetVerticalInterval(mouseLoc.Point.Y - wpfHexView.ViewportTop);
return(ScrollDirection.Up);
}
if (mouseLoc.Point.Y >= wpfHexView.ViewportBottom)
{
interval = GetVerticalInterval(mouseLoc.Point.Y - wpfHexView.ViewportBottom);
return(ScrollDirection.Down);
}
if (mouseLoc.Point.X < wpfHexView.ViewportLeft)
{
interval = GetHorizontalInterval(mouseLoc.Point.X - wpfHexView.ViewportLeft);
return(ScrollDirection.Left);
}
if (mouseLoc.Point.X >= wpfHexView.ViewportRight)
{
interval = GetHorizontalInterval(mouseLoc.Point.X - wpfHexView.ViewportRight);
return(ScrollDirection.Right);
}
interval = TimeSpan.Zero;
return(null);
}
void VisualElement_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if (VisualElement.CaptureMouse())
{
var line = HexMouseLocation.Create(wpfHexViewHost.HexView, e, insertionPosition: false).HexViewLine;
editorOperations.SelectLine(line, (Keyboard.Modifiers & ModifierKeys.Shift) != 0);
mouseCaptured = true;
e.Handled = true;
return;
}
}
bool IsInSelection(HexMouseLocation mouseLoc) {
if (wpfHexView.Selection.IsEmpty)
return false;
var position = mouseLoc.HexViewLine.BufferLine.GetClosestCellPosition(mouseLoc.Position, onlyVisibleCells: true);
if (position == null)
return false;
var point = position.Value.BufferPosition;
foreach (var span in wpfHexView.Selection.SelectedSpans) {
if (span.Contains(point))
return true;
}
return false;
}
void WpfHexView_MouseMove(object sender, MouseEventArgs e)
{
if (owner.IsClosed || owner.IsMouseOverOverlayLayerElement(e))
{
ClearMouseHoverPositionAndStopTimer();
return;
}
if (e.LeftButton != MouseButtonState.Released || e.RightButton != MouseButtonState.Released || e.MiddleButton != MouseButtonState.Released)
{
return;
}
var loc = HexMouseLocation.TryCreateTextOnly(owner, e);
LinePosition?newPosition;
if (loc == null)
{
newPosition = null;
}
else if (loc.Position > loc.HexViewLine.TextSpan.End)
{
newPosition = null;
}
else if (!(loc.HexViewLine.TextTop <= loc.Point.Y && loc.Point.Y < loc.HexViewLine.TextBottom))
{
newPosition = null;
}
else if (!(loc.HexViewLine.TextLeft <= loc.Point.X && loc.Point.X < loc.HexViewLine.TextRight))
{
newPosition = null;
}
else
{
newPosition = new LinePosition(loc.HexViewLine.BufferLine, loc.Position);
}
if (newPosition != position)
{
position = newPosition;
StopTimer();
foreach (var h in handlers)
{
h.Raised = false;
}
UpdateTimer();
}
}
bool IsInSelection(HexMouseLocation mouseLoc)
{
if (wpfHexView.Selection.IsEmpty)
{
return(false);
}
var position = mouseLoc.HexViewLine.BufferLine.GetClosestCellPosition(mouseLoc.Position, onlyVisibleCells: true);
if (position == null)
{
return(false);
}
var point = position.Value.BufferPosition;
foreach (var span in wpfHexView.Selection.SelectedSpans)
{
if (span.Contains(point))
{
return(true);
}
}
return(false);
}
void VisualElement_MouseMove(object sender, MouseEventArgs e)
{
if (mouseCaptured)
{
var mouseLoc = HexMouseLocation.Create(wpfHexViewHost.HexView, e, insertionPosition: false);
var line = mouseLoc.HexViewLine;
editorOperations.SelectLine(line, true);
// Needed or the scrolling will stop
if (mouseLoc.Point.Y <= wpfHexViewHost.HexView.ViewportTop)
{
editorOperations.ScrollUpAndMoveCaretIfNecessary();
}
else if (mouseLoc.Point.Y >= wpfHexViewHost.HexView.ViewportBottom)
{
var lastVisLine = wpfHexViewHost.HexView.HexViewLines.LastVisibleLine;
if (!lastVisLine.IsLastDocumentLine() || lastVisLine.VisibilityState != VSTF.VisibilityState.FullyVisible)
{
editorOperations.ScrollDownAndMoveCaretIfNecessary();
}
}
e.Handled = true;
return;
}
}
void SelectToMousePosition(HexMouseLocation mouseLoc, bool extendSelection) => editorOperations.MoveCaret(mouseLoc.HexViewLine, mouseLoc.Point.X, extendSelection, hexMoveToFlags);
HexMouseLocation GetLocation(MouseEventArgs e) => HexMouseLocation.Create(wpfHexView, e, insertionPosition: insertionPosition);
void SelectToMousePosition(HexMouseLocation mouseLoc, bool extendSelection) => editorOperations.MoveCaret(mouseLoc.HexViewLine, mouseLoc.Point.X, extendSelection, hexMoveToFlags);
ScrollDirection? GetScrollDirection(HexMouseLocation mouseLoc, out TimeSpan interval) {
// Give prio to scrolling up/down (more common than scrolling left/right)
if (mouseLoc.Point.Y < wpfHexView.ViewportTop) {
interval = GetVerticalInterval(mouseLoc.Point.Y - wpfHexView.ViewportTop);
return ScrollDirection.Up;
}
if (mouseLoc.Point.Y >= wpfHexView.ViewportBottom) {
interval = GetVerticalInterval(mouseLoc.Point.Y - wpfHexView.ViewportBottom);
return ScrollDirection.Down;
}
if (mouseLoc.Point.X < wpfHexView.ViewportLeft) {
interval = GetHorizontalInterval(mouseLoc.Point.X - wpfHexView.ViewportLeft);
return ScrollDirection.Left;
}
if (mouseLoc.Point.X >= wpfHexView.ViewportRight) {
interval = GetHorizontalInterval(mouseLoc.Point.X - wpfHexView.ViewportRight);
return ScrollDirection.Right;
}
interval = TimeSpan.Zero;
return null;
}
