private void ResizeDisplayViewport( DragDeltaEventArgs e, ResizeEdge relativeTo )
{
// get the existing viewport rect and scale
Rect viewportRect = _viewFinderDisplay.ViewportRect;
double scale = _viewFinderDisplay.Scale;
// ensure that we stay within the bounds of the VisualBrush
double x = Math.Max( _resizeViewportBounds.Left, Math.Min( _resizeDraggingPoint.X + e.HorizontalChange, _resizeViewportBounds.Right ) );
double y = Math.Max( _resizeViewportBounds.Top, Math.Min( _resizeDraggingPoint.Y + e.VerticalChange, _resizeViewportBounds.Bottom ) );
// get the selected region in the coordinate space of the content
Point anchorPoint = new Point( _resizeAnchorPoint.X / scale, _resizeAnchorPoint.Y / scale );
Vector newRegionVector = new Vector( ( x - _resizeAnchorPoint.X ) / scale / _viewboxFactor, ( y - _resizeAnchorPoint.Y ) / scale / _viewboxFactor );
Rect region = new Rect( anchorPoint, newRegionVector );
// now translate the region from the coordinate space of the content
// to the coordinate space of the content presenter
region =
new Rect(
_content.TranslatePoint( region.TopLeft, _contentPresenter ),
_content.TranslatePoint( region.BottomRight, _contentPresenter ) );
// calculate actual scale value
double aspectX = _content.DesiredSize.Width / region.Width;
double aspectY = _content.DesiredSize.Height / region.Height;
scale = aspectX < aspectY ? aspectX : aspectY;
// scale relative to the anchor point
this.ZoomTo( scale, anchorPoint, false, false );
}
protected void OnMouseLeftUp(MouseEventArgs e)
{
dragging = false;
resizeEdge = ResizeEdge.None;
}
protected void OnMouseLeftDown(MouseEventArgs e)
{
Vector2 mousePosition = GetPositionInScene(new Vector2(e.Location));
// unselect all items
foreach (ObsSceneItem item in scene.Items)
item.Selected = false;
const float edgeSize = 0.01f;
// select item under the mouse cursor
using (ObsSceneItem mouseItem = GetItemAtPosition(mousePosition, edgeSize))
{
if (mouseItem == null || dragging)
return;
mouseItem.Selected = true;
Vector3 transformedPos = Vector3.GetTransform(
new Vector3(mousePosition), mouseItem.BoxTransform.GetInverse());
bool edgeTop = transformedPos.y <= edgeSize;
bool edgeBottom = transformedPos.y >= 1.0f-edgeSize;
bool edgeLeft = transformedPos.x <= edgeSize;
bool edgeRight = transformedPos.x >= 1.0f-edgeSize;
bool center = !edgeTop && !edgeBottom && !edgeLeft && !edgeRight;
if (center)
{
resizeEdge = ResizeEdge.None;
Cursor.Current = Cursors.Hand;
dragging = true;
dragLastPosition = mousePosition;
dragStartPosition = mousePosition;
}
else
{
dragLastPosition = mousePosition;
dragStartPosition = mousePosition;
itemLastPosition = mouseItem.Position;
itemLastBounds = mouseItem.Bounds;
resizeEdge = ResizeEdge.None;
if (edgeTop)
{
Cursor.Current = Cursors.SizeNS;
resizeEdge |= ResizeEdge.Top;
}
else if (edgeBottom)
{
Cursor.Current = Cursors.SizeNS;
resizeEdge |= ResizeEdge.Bottom;
}
if (edgeLeft)
{
Cursor.Current = Cursors.SizeWE;
resizeEdge |= ResizeEdge.Left;
}
else if (edgeRight)
{
Cursor.Current = Cursors.SizeWE;
resizeEdge |= ResizeEdge.Right;
}
}
if (mouseItem == hoveredItem)
SetHoveredItem(null);
}
}
private void ResizeDisplayViewport(DragDeltaEventArgs e, ResizeEdge relativeTo)
{
return;// NOT IMPLEMENTED
// get the existing viewport rect and scale
/*
var viewportRect = _viewFinderDisplay.ViewportRect;
var scale = _viewFinderDisplay.Scale;
// ensure that we stay within the bounds of the VisualBrush
var x = Math.Max(_resizeViewportBounds.Left, Math.Min(_resizeDraggingPoint.X + e.HorizontalChange, _resizeViewportBounds.Right));
var y = Math.Max(_resizeViewportBounds.Top, Math.Min(_resizeDraggingPoint.Y + e.VerticalChange, _resizeViewportBounds.Bottom));
// get the selected region in the coordinate space of the content
var anchorPoint = new Point(_resizeAnchorPoint.X / scale, _resizeAnchorPoint.Y / scale);
var newRegionVector = new Vector((x - _resizeAnchorPoint.X) / scale / _viewboxFactor, (y - _resizeAnchorPoint.Y) / scale / _viewboxFactor);
var region2 = new Rect(anchorPoint, newRegionVector);
// now translate the region from the coordinate space of the content
// to the coordinate space of the content presenter
var region =
new Rect(
(Content as UIElement).TranslatePoint(region2.TopLeft, _presenter),
(Content as UIElement).TranslatePoint(region2.BottomRight, _presenter));
// calculate actual scale value
var aspectX = RenderSize.Width / region.Width;
var aspectY = RenderSize.Height / region.Height;
scale = aspectX < aspectY ? aspectX : aspectY;
// scale relative to the anchor point
ZoomToInternal(region2);
*/
}
protected void OnMouseLeftUp(MouseEventArgs e)
{
dragging = false;
resizeEdge = ResizeEdge.None;
}
protected void OnMouseLeftDown(MouseEventArgs e)
{
Vector2 mousePosition = GetPositionInScene(new Vector2(e.Location));
// unselect all items
foreach (ObsSceneItem item in scene.Items)
{
item.Selected = false;
}
const float edgeSize = 0.01f;
// select item under the mouse cursor
using (ObsSceneItem mouseItem = GetItemAtPosition(mousePosition, edgeSize))
{
if (mouseItem == null || dragging)
{
return;
}
mouseItem.Selected = true;
Vector3 transformedPos = Vector3.GetTransform(
new Vector3(mousePosition), mouseItem.BoxTransform.GetInverse());
bool edgeTop = transformedPos.y <= edgeSize;
bool edgeBottom = transformedPos.y >= 1.0f - edgeSize;
bool edgeLeft = transformedPos.x <= edgeSize;
bool edgeRight = transformedPos.x >= 1.0f - edgeSize;
bool center = !edgeTop && !edgeBottom && !edgeLeft && !edgeRight;
if (center)
{
resizeEdge = ResizeEdge.None;
Cursor.Current = Cursors.Hand;
dragging = true;
dragLastPosition = mousePosition;
dragStartPosition = mousePosition;
}
else
{
dragLastPosition = mousePosition;
dragStartPosition = mousePosition;
itemLastPosition = mouseItem.Position;
itemLastBounds = mouseItem.Bounds;
resizeEdge = ResizeEdge.None;
if (edgeTop)
{
Cursor.Current = Cursors.SizeNS;
resizeEdge |= ResizeEdge.Top;
}
else if (edgeBottom)
{
Cursor.Current = Cursors.SizeNS;
resizeEdge |= ResizeEdge.Bottom;
}
if (edgeLeft)
{
Cursor.Current = Cursors.SizeWE;
resizeEdge |= ResizeEdge.Left;
}
else if (edgeRight)
{
Cursor.Current = Cursors.SizeWE;
resizeEdge |= ResizeEdge.Right;
}
}
if (mouseItem == hoveredItem)
{
SetHoveredItem(null);
}
}
}
