/// <summary>
/// Draws the snap-to indicator to give the user a visual cue that snapping is occurring</summary>
/// <param name="sender">The TimelineControl whose Paint event is being raised</param>
/// <param name="e">The paint event args</param>
/// <remarks>Draws a vertical line at the snapping location</remarks>
private void owner_DrawingD2d(object sender, EventArgs e)
{
if (m_snapInfo.Count == 0)
{
return;
}
D2dGraphics g = m_owner.D2dGraphics;
Rectangle clipRectangle = m_owner.VisibleClientRectangle;
try
{
g.PushAxisAlignedClip(clipRectangle);
Matrix worldToView = m_owner.Transform;
foreach (SnapOffsetInfo info in m_snapInfo)
{
float viewXCoord = GdiUtil.Transform(worldToView, info.SnapToPoint);
g.DrawLine(viewXCoord, clipRectangle.Top, viewXCoord, clipRectangle.Bottom, s_color, 3.0f, null);
}
}
finally
{
g.PopAxisAlignedClip();
}
}
private void owner_DrawingD2d(object sender, EventArgs e)
{
// Tighten clipping region. The TimelineRenderer assumes that it has to shrink the current
// Graphics.Clip region by the header width.
D2dGraphics g = Owner.D2dGraphics;
Rectangle clipRectangle = Owner.VisibleClientRectangle;
try
{
g.PushAxisAlignedClip(clipRectangle);
DrawManipulator(g, out m_handleRect);
}
finally
{
g.PopAxisAlignedClip();
}
}
private void owner_DrawingD2d(object sender, EventArgs e)
{
// Test if anything is visible.
m_visibleManipulator =
D2dTimelineControl.CalculateRange(Owner.EditableSelection, out m_worldMin, out m_worldMax);
if (!m_visibleManipulator)
{
return;
}
D2dGraphics g = Owner.D2dGraphics;
Matrix worldToView = Owner.Transform;
// Make the TimelineRenderer draw the ghosts, if necessary. Must happen before
// the manipulator is drawn so that snap-to info is created.
if (IsScaling)
{
TimelineLayout layout = Owner.GetLayout();
GhostInfo[] ghosts = m_resizer.CreateGhostInfo(
layout,
Owner.GetDragOffset().X,
worldToView);
Owner.Renderer.DrawGhosts(
ghosts,
DraggedSide,
worldToView,
Owner.ClientRectangle);
}
// Tighten clipping region. Has to occur after DrawGhosts because the TimelineRenderer
// assumes that it has to shrink the current Graphics.Clip region by the header width.
try
{
g.PushAxisAlignedClip(Owner.VisibleClientRectangle);
// Draw the manipulator, giving client code a customization point.
DrawManipulator(g, out m_leftHandle, out m_rightHandle);
}
finally
{
g.PopAxisAlignedClip();
}
}
