internal override void StartDrag(MouseEventArgs e)
{
_startLoc = new Point(e.X, e.Y);
_previousLoc = new Point(e.X, e.Y);
screenGraphics = Chart.CreateGraphics();
backBuffer = new MemGraphics(Chart.Width, Chart.Height);
frontBuffer = new MemGraphics(Chart.Width, Chart.Height);
Chart.Draw(backBuffer.Graphics);
var rect = CurrentPane.ClientToChart(CurrentPane.CanvasRect);
frontBuffer.Graphics.SetClip(rect);
pen = new Pen(ForeColor);
brush = new SolidBrush(BackColor);
DrawSelection(_startLoc, _startLoc);
}
internal override void FinishDrag(MouseEventArgs e)
{
if (PaneFrameTool.PaneMoveStyle == PaneMoveStyle.Blend)
{
_imageAttr.Dispose();
_imageAttr = null;
_colorMatrix = null;
}
else
{
_pen.Dispose();
}
_screenGraphics.Dispose();
_backBuffer.Dispose();
_frontBuffer.Dispose();
Point point = CurrentPane.ClientToChart(new Point(e.X, e.Y));
Pane topPane;
if (point.Y < Chart.ClientRect.Top)
{
topPane = Chart.Panes.TopPane;
}
else if (point.Y > ((Chart.ClientRect.Bottom - 1) - Chart.Panes.XAxisPane.FixedHeight))
{
topPane = Chart.Panes.BottomPane;
}
else
{
topPane = Owner.FindPane(Chart.ClientRect.Left, point.Y);
}
if ((topPane != CurrentPane) && (topPane != null))
{
int index = Chart.Panes.PositionList.IndexOf(CurrentPane);
if (Chart.Panes.PositionList.IndexOf(topPane) > index)
{
Chart.Panes.PositionList.Remove(CurrentPane);
int num3 = Chart.Panes.PositionList.IndexOf(topPane);
Chart.Panes.PositionList.Insert(num3 + 1, CurrentPane);
}
else
{
Chart.Panes.PositionList.Remove(CurrentPane);
int num4 = Chart.Panes.PositionList.IndexOf(topPane);
Chart.Panes.PositionList.Insert(num4, CurrentPane);
}
}
Chart.PerformLayout();
}
private void DrawSelection(Point previousLoc, Point currentLoc)
{
Point point = CurrentPane.ClientToChart(_startLoc);
previousLoc = CurrentPane.ClientToChart(previousLoc);
currentLoc = CurrentPane.ClientToChart(currentLoc);
Rectangle rectangle = CurrentPane.ClientToChart(CurrentPane.CanvasRect);
Rectangle rectangle2 = previousLoc.X > point.X
? new Rectangle(point.X, rectangle.Y, (previousLoc.X - point.X) + 1, rectangle.Height)
: new Rectangle(previousLoc.X, rectangle.Y, (point.X - previousLoc.X) + 1, rectangle.Height);
Rectangle rectangle3 = currentLoc.X > point.X
? new Rectangle(point.X, rectangle.Y, (currentLoc.X - point.X) + 1, rectangle.Height)
: new Rectangle(currentLoc.X, rectangle.Y, (point.X - currentLoc.X) + 1, rectangle.Height);
backBuffer.Render(frontBuffer, rectangle2);
frontBuffer.Graphics.FillRectangle(brush, rectangle3);
frontBuffer.Graphics.DrawLine(pen, rectangle3.Left, rectangle3.Top, rectangle3.Left, rectangle3.Bottom);
if (rectangle3.Width > 0)
{
frontBuffer.Graphics.DrawLine(pen, rectangle3.Right - 1, rectangle3.Top, rectangle3.Right - 1,
rectangle3.Bottom);
}
frontBuffer.Render(screenGraphics, Rectangle.Union(rectangle2, rectangle3));
}
