/// <summary>
/// MouseMove method for RubberBand selection
/// </summary>
/// <param name="X">mouse X position</param>
/// <param name="Y"> mouse Y position</param>
/// <param name="keys"> mouse and keyboard modifiers</param>
/// <param name="ps">the InteractivePlotSurface2D</param>
public override bool DoMouseMove(int X, int Y, Modifier keys, InteractivePlotSurface2D ps)
{
if (((keys & Modifier.Button1) != 0) && selectionActive_)
{
// clip X and Y to PlotArea
Rectangle bounds = ps.PlotAreaBoundingBoxCache;
X = Math.Max(X, bounds.Left);
X = Math.Min(X, bounds.Right);
Y = Math.Max(Y, bounds.Top);
Y = Math.Min(Y, bounds.Bottom);
Point here = new Point(X,Y);
// delete previous overlay rectangle
if (endPoint_ != unset_) {
ps.DrawOverlayRectangle(startPoint_, endPoint_, Color.White, false);
}
endPoint_ = here;
// draw the latest rectangle
ps.DrawOverlayRectangle(startPoint_, endPoint_, Color.White, true);
}
return false;
}
/// <summary>
/// MouseUp method for RubberBand selection
/// </summary>
/// <param name="X">mouse X position</param>
/// <param name="Y"> mouse Y position</param>
/// <param name="keys"> mouse and keyboard modifiers</param>
/// <param name="ps">the InteractivePlotSurface2D</param>
public override bool DoMouseUp(int X, int Y, Modifier keys, InteractivePlotSurface2D ps)
{
bool modified = false;
if (selectionActive_) {
// erase current (clipped) rectangle
ps.DrawOverlayRectangle(startPoint_, endPoint_, Color.White, false);
endPoint_.X = X;
endPoint_.Y = Y;
Rectangle bounds = ps.PlotAreaBoundingBoxCache;
if (!bounds.Contains(endPoint_)) {
// MouseUp outside plotArea - cancel selection
modified = false;
}
else {
ps.CacheAxes();
// Redefine range based on selection. The proportions for
// Min and Max do not require Min < Max, since they will
// be re-ordered by Axis.DefineRange if necessary
double xMin = startPoint_.X - bounds.Left;
double yMin = bounds.Bottom - startPoint_.Y;
double xMax = endPoint_.X - bounds.Left;
double yMax = bounds.Bottom - endPoint_.Y;
double xMinProp = xMin/bounds.Width;
double xMaxProp = xMax/bounds.Width;
double yMinProp = yMin/bounds.Height;
double yMaxProp = yMax/bounds.Height;
ps.DefineAxis(ps.XAxis1, xMinProp, xMaxProp);
ps.DefineAxis(ps.XAxis2, xMinProp, xMaxProp);
ps.DefineAxis(ps.YAxis1, yMinProp, yMaxProp);
ps.DefineAxis(ps.YAxis2, yMinProp, yMaxProp);
modified = true;
}
selectionActive_ = false;
startPoint_ = unset_;
endPoint_ = unset_;
}
return modified;
}
/// <summary>
/// MouseLeave method for RubberBand selection
/// </summary>
/// <param name="ps">the InteractivePlotSurface2D</param>
public override bool DoMouseLeave(InteractivePlotSurface2D ps)
{
if (selectionActive_) {
selectionActive_ = false;
if (endPoint_ != unset_) {
// erase latest rectangle
ps.DrawOverlayRectangle(startPoint_, endPoint_, Color.White, false);
}
startPoint_ = unset_;
endPoint_ = unset_;
}
return false;
}