//TODO: This has not been revisited yet.
/*
* private void MouseMove_DragMoving_OLD(MouseEventArgs e)
* {
* Point gridLocation = translateLocation(e.Location);
*
* // if we don't have anything selected, there's no point dragging anything...
* if (SelectedElements.Count() == 0)
* return;
*
* Point d = new Point(e.X - m_lastMouseLocation.X, e.Y - m_lastMouseLocation.Y);
* m_lastMouseLocation = e.Location;
*
* // calculate the points at which we should start dragging; ie. account for any selected elements.
* // (we subtract VisibleTimeStart to make it relative to the control, instead of the grid canvas.)
* TimeSpan earliestTime = GetEarliestTimeForElements(SelectedElements);
* TimeSpan latestTime = GetLatestTimeForElements(SelectedElements);
* int leftBoundary = (int)timeToPixels(earliestTime - VisibleTimeStart + DragTimeLeftOver);
* int rightBoundary = (int)timeToPixels(latestTime - VisibleTimeStart + DragTimeLeftOver);
*
* // if the mouse moved left, only add it to the scroll size if:
* // 1) the elements are hard left (or more) in the viewport
* // 2) the elements are hard right, and we are moving right. This provides deceleration.
* // Cap this value to 0.
* if (d.X < 0)
* {
* if (leftBoundary <= 0)
* m_dragAutoscrollDistance.Width += d.X;
* else if (rightBoundary >= ClientSize.Width && m_dragAutoscrollDistance.Width > 0)
* m_dragAutoscrollDistance.Width = Math.Max(0, m_dragAutoscrollDistance.Width + d.X);
* }
*
* // if the mouse moved right, do the inverse of the above rules.
* if (d.X > 0)
* {
* if (rightBoundary >= ClientSize.Width)
* m_dragAutoscrollDistance.Width += d.X;
* else if (leftBoundary <= 0 && m_dragAutoscrollDistance.Width < 0)
* m_dragAutoscrollDistance.Width = Math.Min(0, m_dragAutoscrollDistance.Width + d.X);
* }
*
* // if the left and right boundaries are within the viewport, then stop all
* // horizontal scrolling. This can happen if the user scrolls, and mouse-wheels
* // (to zoom out). the control is stuck scrolling, and can't be stopped.
* if (leftBoundary > 0 && rightBoundary < ClientSize.Width)
* m_dragAutoscrollDistance.Width = 0;
*
* m_dragAutoscrollDistance.Height = (e.Y < 0) ? e.Y : ((e.Y > ClientSize.Height) ? e.Y - ClientSize.Height : 0);
*
* // if we're scrolling, start the timer if needed. If not, vice-versa.
* if (m_dragAutoscrollDistance.Width != 0 || m_dragAutoscrollDistance.Height != 0)
* {
* if (!ScrollTimer.Enabled)
* ScrollTimer.Start();
* }
* else
* {
* if (ScrollTimer.Enabled)
* ScrollTimer.Stop();
* }
*
* // only move the elements here if we aren't going to be auto-dragging while scrolling in the timer events.
* if (d.X != 0 && m_dragAutoscrollDistance.Width == 0)
* {
* TimeSpan desiredMoveTime = DragTimeLeftOver + pixelsToTime(d.X);
* TimeSpan realMoveTime = OffsetElementsByTime(SelectedElements, desiredMoveTime);
* DragTimeLeftOver = desiredMoveTime - realMoveTime;
* }
*
* // if we've moved vertically, we may need to move elements between rows
* if (d.Y != 0 && !ResizingElement)
* {
* MoveElementsVerticallyToLocation(SelectedElements, gridLocation);
* }
* }
*/
/// <summary>
/// Handles mouse move events while in the "Moving" state.
/// </summary>
/// <param name="gridLocation">Mouse location on the grid.</param>
private void MouseMove_DragMoving(Point gridLocation)
{
// if we don't have anything selected, there's no point dragging anything...
if (SelectedElements.Count() == 0)
{
return;
}
TimeSpan dt = pixelsToTime(gridLocation.X - m_elemMoveInfo.InitialGridLocation.X);
int dy = gridLocation.Y - m_elemMoveInfo.InitialGridLocation.Y;
// If we didn't move, get outta here.
if (dt == TimeSpan.Zero && dy == 0)
{
return;
}
// Calculate what our actual dt value will be.
TimeSpan earliest = m_elemMoveInfo.OriginalElements.Values.Min(x => x.StartTime);
if ((earliest + dt) < TimeSpan.Zero)
{
dt = -earliest;
}
TimeSpan latest = m_elemMoveInfo.OriginalElements.Values.Max(x => x.EndTime);
if ((latest + dt) > TimeInfo.TotalTime)
{
dt = TimeInfo.TotalTime - latest;
}
// modify the dt time based on snap points (ie. marks, and borders of other elements)
dt = FindSnapTimeForElements(SelectedElements, dt, ResizeZone.None);
foreach (var elem in SelectedElements)
{
// Get this elemenent's original times (before resize started)
ElementTimeInfo orig = m_elemMoveInfo.OriginalElements[elem];
elem.StartTime = orig.StartTime + dt;
}
// if we've moved vertically, we may need to move elements between rows
if (dy != 0)
{
MoveElementsVerticallyToLocation(SelectedElements, gridLocation);
}
Invalidate();
}