/*
* /// <summary>
* /// Move the position of the object at the specified index
* /// to the new relative position in the list.</summary>
* /// <remarks>For Graphic type objects, this method controls the
* /// Z-Order of the items. Objects at the beginning of the list
* /// appear in front of objects at the end of the list.</remarks>
* /// <param name="index">The zero-based index of the object
* /// to be moved.</param>
* /// <param name="relativePos">The relative number of positions to move
* /// the object. A value of -1 will move the
* /// object one position earlier in the list, a value
* /// of 1 will move it one position later. To move an item to the
* /// beginning of the list, use a large negative value (such as -999).
* /// To move it to the end of the list, use a large positive value.
* /// </param>
* /// <returns>The new position for the object, or -1 if the object
* /// was not found.</returns>
* public int Move( int index, int relativePos )
* {
* if ( index < 0 || index >= Count )
* return -1;
*
* GraphObj graphObj = this[index];
* this.RemoveAt( index );
*
* index += relativePos;
* if ( index < 0 )
* index = 0;
* if ( index > Count )
* index = Count;
*
* Insert( index, graphObj );
* return index;
* }
*/
#endregion
#region Render Methods
/// <summary>
/// Render text to the specified <see cref="Graphics"/> device
/// by calling the Draw method of each <see cref="GraphObj"/> object in
/// the collection.
/// </summary>
/// <remarks>This method is normally only called by the Draw method
/// of the parent <see cref="GraphPane"/> object.
/// </remarks>
/// <param name="g">
/// A graphic device object to be drawn into. This is normally e.Graphics from the
/// PaintEventArgs argument to the Paint() method.
/// </param>
/// <param name="pane">
/// A reference to the <see cref="PaneBase"/> object that is the parent or
/// owner of this object.
/// </param>
/// <param name="scaleFactor">
/// The scaling factor to be used for rendering objects. This is calculated and
/// passed down by the parent <see cref="GraphPane"/> object using the
/// <see cref="PaneBase.CalcScaleFactor"/> method, and is used to proportionally adjust
/// font sizes, etc. according to the actual size of the graph.
/// </param>
/// <param name="zOrder">A <see cref="ZOrder"/> enumeration that controls
/// the placement of this <see cref="GraphObj"/> relative to other
/// graphic objects. The order of <see cref="GraphObj"/>'s with the
/// same <see cref="ZOrder"/> value is control by their order in
/// this <see cref="GraphObjList"/>.</param>
public void Draw(Graphics g, PaneBase pane, float scaleFactor,
ZOrder zOrder)
{
// Draw the items in reverse order, so the last items in the
// list appear behind the first items (consistent with
// CurveList)
for (int i = this.Count - 1; i >= 0; i--)
{
GraphObj item = this[i];
if (item.ZOrder == zOrder && item.IsVisible)
{
Region region = null;
if (item.IsClippedToChartRect && pane is GraphPane)
{
region = g.Clip.Clone();
g.SetClip(((GraphPane)pane).Chart._rect);
}
item.Draw(g, pane, scaleFactor);
if (item.IsClippedToChartRect && pane is GraphPane)
{
g.Clip = region;
}
}
}
}
/// <summary>
/// Render text to the specified <see cref="Graphics"/> device
/// by calling the Draw method of each <see cref="GraphObj"/> object in
/// the collection.
/// </summary>
/// <remarks>This method is normally only called by the Draw method
/// of the parent <see cref="GraphPane"/> object.
/// </remarks>
/// <param name="g">
/// A graphic device object to be drawn into. This is normally e.Graphics from the
/// PaintEventArgs argument to the Paint() method.
/// </param>
/// <param name="pane">
/// A reference to the <see cref="PaneBase"/> object that is the parent or
/// owner of this object.
/// </param>
/// <param name="scaleFactor">
/// The scaling factor to be used for rendering objects. This is calculated and
/// passed down by the parent <see cref="GraphPane"/> object using the
/// <see cref="PaneBase.CalcScaleFactor"/> method, and is used to proportionally adjust
/// font sizes, etc. according to the actual size of the graph.
/// </param>
/// <param name="zOrder">A <see cref="ZOrder"/> enumeration that controls
/// the placement of this <see cref="GraphObj"/> relative to other
/// graphic objects. The order of <see cref="GraphObj"/>'s with the
/// same <see cref="ZOrder"/> value is control by their order in
/// this <see cref="GraphObjList"/>.</param>
public void Draw(Graphics g, PaneBase pane, float scaleFactor,
ZOrder zOrder)
{
GraphPane graphPane = pane as GraphPane;
int minX = int.MinValue;
int maxX = int.MaxValue;
int minY = int.MinValue;
int maxY = int.MaxValue;
bool isOptDraw = false;
if (graphPane != null)
{
isOptDraw = true;
minX = (int)graphPane.Chart.Rect.Left;
maxX = (int)graphPane.Chart.Rect.Right;
minY = (int)graphPane.Chart.Rect.Top;
maxY = (int)graphPane.Chart.Rect.Bottom;
if (isOptDraw)
{
if (isPixelDrawn == null)
{
isPixelDrawn = new MultiDimBitArray(maxX, maxY);
}
else
{
isPixelDrawn.TryResize(maxX, maxY);
}
}
}
// Draw the items in reverse order, so the last items in the
// list appear behind the first items (consistent with
// CurveList)
List <GraphObj> graphObjs = zOrderList[(int)zOrder];
for (int i = graphObjs.Count - 1; i >= 0; i--)
{
GraphObj item = graphObjs[i];
PointF pix = item.Location.Transform(pane);
if (item.ZOrder == zOrder && item.IsVisible &&
pix.X >= minX && pix.X <= maxX &&
pix.Y >= minY && pix.Y <= maxY)
{
// Don't try to draw where we already drew.
// This is a huge optimization when there are
// many more draw items than pixels in the rectangle.
if (isPixelDrawn[(int)pix.X, (int)pix.Y])
{
continue;
}
isPixelDrawn[(int)pix.X, (int)pix.Y] = true;
Region region = null;
if (item.IsClippedToChartRect && pane is GraphPane)
{
region = g.Clip.Clone();
g.SetClip(((GraphPane)pane).Chart._rect);
}
item.Draw(g, pane, scaleFactor);
if (item.IsClippedToChartRect && pane is GraphPane)
{
g.Clip = region;
}
}
}
}
