/// <summary>
/// MouseMove method for PlotDrag interaction
/// </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)
{
Rectangle area = ps.PlotAreaBoundingBoxCache;
// Mouse Left-Button gives Plot Drag, Ctrl.Left-Button Zooms
if (((keys & Modifier.Button1) != 0) && dragInitiated_)
{
ps.CacheAxes();
double dX = X - lastPoint_.X; // distance mouse has moved
double dY = Y - lastPoint_.Y;
lastPoint_ = new Point(X, Y);
if ((keys & Modifier.Control) != 0)
{
// Axis re-ranging required
double factor = Sensitivity;
if ((keys & Modifier.Alt) != 0)
{
factor *= 0.25; // arbitrary change
}
double xProportion = +dX * factor / area.Width;
double yProportion = -dY * factor / area.Height;
if (horizontal_)
{
ps.ZoomXAxes(xProportion, focusX);
}
if (vertical_)
{
ps.ZoomYAxes(yProportion, focusY);
}
}
else
{
// Axis translation required
double xShift = -dX / area.Width;
double yShift = +dY / area.Height;
if (horizontal_)
{
ps.TranslateXAxes(xShift);
}
if (vertical_)
{
ps.TranslateYAxes(yShift);
}
}
return(true);
}
return(false);
}
/// <summary>
/// Handler for KeyPress events
/// </summary>
/// <param name="key">the NPlot key enumeration</param>
/// <param name="ps">the InteractivePlotSurface2D</param>
/// <returns></returns>
public override bool DoKeyPress(Modifier keys, InteractivePlotSurface2D ps)
{
double factor = Sensitivity;
if (((keys & Modifier.Alt) != 0))
{
factor *= altFactor;
}
if ((keys & Modifier.Home) != 0)
{
ps.SetOriginalDimensions();
return(true);
}
if ((keys & Modifier.Left) != 0)
{
ps.CacheAxes();
ps.TranslateXAxes(left * factor);
return(true);
}
if ((keys & Modifier.Right) != 0)
{
ps.CacheAxes();
ps.TranslateXAxes(right * factor);
return(true);
}
if ((keys & Modifier.Up) != 0)
{
ps.CacheAxes();
ps.TranslateYAxes(up * factor);
return(true);
}
if ((keys & Modifier.Down) != 0)
{
ps.CacheAxes();
ps.TranslateYAxes(down * factor);
return(true);
}
if ((keys & Modifier.Plus) != 0)
{
ps.CacheAxes();
ps.ZoomXAxes(zoomIn * factor, symmetrical);
ps.ZoomYAxes(zoomIn * factor, symmetrical);
return(true);
}
if ((keys & Modifier.Minus) != 0)
{
ps.CacheAxes();
ps.ZoomXAxes(zoomOut * factor, symmetrical);
ps.ZoomYAxes(zoomOut * factor, symmetrical);
return(true);
}
return(false);
}
/// <summary>
/// Mouse Scroll (wheel) method for AxisZoom interaction
/// </summary>
public override bool DoMouseScroll(int X, int Y, int direction, Modifier keys, InteractivePlotSurface2D ps)
{
// Add timeout into Gtk loop when scroll starts - Omit for now
// GLib.Timeout.Add (500, new GLib.TimeoutHandler (zoomTimeout) );
zoomActive = true;
surface = ps;
double proportion = 0.1 * sensitivity_; // use initial zoom of 10%
double focusX = 0.5, focusY = 0.5; // default focus point
// Zoom direction is +1 for Up/ZoomIn, or -1 for Down/ZoomOut
proportion *= -direction;
// delete previous focusPoint drawing - this is all a bit 'tentative'
ps.QueueDraw(focusRect);
Rectangle area = ps.PlotAreaBoundingBoxCache;
if (area.Contains(X, Y))
{
p.X = X;
p.Y = Y;
focusX = (double)(X - area.Left) / (double)area.Width;
focusY = (double)(area.Bottom - Y) / (double)area.Height;
}
// Zoom in/out for all defined axes
ps.CacheAxes();
ps.ZoomXAxes(proportion, focusX);
ps.ZoomYAxes(proportion, focusY);
// Note: r = 16, and Focus extents range from x-2*r-1 to x+2*r+1, y-2*r-1 to y+2*r+1
int x = p.X - 31;
int y = p.Y - 31;
focusRect = new Rectangle(x, y, 64, 64);
// draw new focusRect
ps.QueueDraw(focusRect);
return(true);
}
/// <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;
// delete previous overlay rectangle
ps.QueueDraw(selection);
if (selectionActive)
{
selectionActive = false;
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.DefineXAxes(xMinProp, xMaxProp);
ps.DefineYAxes(yMinProp, yMaxProp);
modified = true;
}
}
return(modified);
}
/// <summary>
/// MouseMove method for AxisDrag interaction
/// </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) && dragging_ && physicalAxis_ != null)
{
ps.CacheAxes();
float dX = (X - lastPoint_.X);
float dY = (Y - lastPoint_.Y);
lastPoint_ = new Point(X, Y);
// In case the physical axis is not horizontal/vertical, combine dX and dY
// in a way which preserves their sign and intuitive axis zoom sense, ie
// because the physical origin is top-left, expand with +ve dX, but -ve dY
double distance = dX - dY;
double proportion = distance * sensitivity_ / physicalAxis_.PhysicalLength;
axis_.IncreaseRange(proportion, focusRatio_);
return(true);
}
return(false);
}
/// <summary>
/// MouseMove method for AxisDrag interaction
/// </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) && dragging_ && physicalAxis_ != null)
{
ps.CacheAxes();
float dX = (X - lastPoint_.X);
float dY = (Y - lastPoint_.Y);
lastPoint_ = new Point(X, Y);
// In case the physical axis is not horizontal/vertical, combine dX and dY
// in a way which preserves their sign and intuitive axis zoom sense, ie
// because the physical origin is top-left, expand with +ve dX, but -ve dY
double distance = dX - dY;
double proportion = distance * sensitivity_ / physicalAxis_.PhysicalLength;
axis_.IncreaseRange(proportion, focusRatio_);
return true;
}
return false;
}
/// <summary>
/// Handler for KeyPress events
/// </summary>
/// <param name="key">the NPlot key enumeration</param>
/// <param name="ps">the InteractivePlotSurface2D</param>
/// <returns></returns>
public override bool DoKeyPress(Modifier keys, InteractivePlotSurface2D ps)
{
double factor = Sensitivity;
if (((keys & Modifier.Alt) != 0))
{
factor *= altFactor;
}
if ((keys & Modifier.Home) != 0)
{
ps.SetOriginalDimensions();
return true;
}
if ((keys & Modifier.Left) != 0)
{
ps.CacheAxes();
ps.TranslateXAxes(left * factor);
return true;
}
if ((keys & Modifier.Right) != 0)
{
ps.CacheAxes();
ps.TranslateXAxes(right * factor);
return true;
}
if ((keys & Modifier.Up) != 0)
{
ps.CacheAxes();
ps.TranslateYAxes(up * factor);
return true;
}
if ((keys & Modifier.Down) != 0)
{
ps.CacheAxes();
ps.TranslateYAxes(down * factor);
return true;
}
if ((keys & Modifier.Plus) != 0)
{
ps.CacheAxes();
ps.ZoomXAxes(zoomIn * factor, symmetrical);
ps.ZoomYAxes(zoomIn * factor, symmetrical);
return true;
}
if ((keys & Modifier.Minus) != 0)
{
ps.CacheAxes();
ps.ZoomXAxes(zoomOut * factor, symmetrical);
ps.ZoomYAxes(zoomOut * factor, symmetrical);
return true;
}
return false;
}
/// <summary>
/// MouseMove method for PlotDrag interaction
/// </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)
{
Rectangle area = ps.PlotAreaBoundingBoxCache;
// Mouse Left-Button gives Plot Drag, Ctrl.Left-Button Zooms
if (((keys & Modifier.Button1) != 0) && dragInitiated_)
{
ps.CacheAxes();
double dX = X - lastPoint_.X; // distance mouse has moved
double dY = Y - lastPoint_.Y;
lastPoint_ = new Point(X, Y);
if ((keys & Modifier.Control) != 0)
{
// Axis re-ranging required
double factor = Sensitivity;
if ((keys & Modifier.Alt) != 0)
{
factor *= 0.25; // arbitrary change
}
double xProportion = +dX * factor / area.Width;
double yProportion = -dY * factor / area.Height;
if (horizontal_)
{
ps.ZoomXAxes(xProportion, focusX);
}
if (vertical_)
{
ps.ZoomYAxes(yProportion, focusY);
}
}
else
{
// Axis translation required
double xShift = -dX / area.Width;
double yShift = +dY / area.Height;
if (horizontal_)
{
ps.TranslateXAxes(xShift);
}
if (vertical_)
{
ps.TranslateYAxes(yShift);
}
}
return 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;
// delete previous overlay rectangle
ps.QueueDraw(selection);
if (selectionActive)
{
selectionActive = false;
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.DefineXAxes(xMinProp, xMaxProp);
ps.DefineYAxes(yMinProp, yMaxProp);
modified = true;
}
}
return modified;
}
/// <summary>
/// Mouse Scroll (wheel) method for AxisZoom interaction
/// </summary>
public override bool DoMouseScroll(int X, int Y, int direction, Modifier keys, InteractivePlotSurface2D ps)
{
// Add timeout into Gtk loop when scroll starts - Omit for now
// GLib.Timeout.Add (500, new GLib.TimeoutHandler (zoomTimeout) );
zoomActive = true;
surface = ps;
double proportion = 0.1 * sensitivity_; // use initial zoom of 10%
double focusX = 0.5, focusY = 0.5; // default focus point
// Zoom direction is +1 for Up/ZoomIn, or -1 for Down/ZoomOut
proportion *= -direction;
// delete previous focusPoint drawing - this is all a bit 'tentative'
ps.QueueDraw(focusRect);
Rectangle area = ps.PlotAreaBoundingBoxCache;
if (area.Contains(X, Y))
{
p.X = X;
p.Y = Y;
focusX = (double)(X - area.Left) / (double)area.Width;
focusY = (double)(area.Bottom - Y) / (double)area.Height;
}
// Zoom in/out for all defined axes
ps.CacheAxes();
ps.ZoomXAxes(proportion, focusX);
ps.ZoomYAxes(proportion, focusY);
// Note: r = 16, and Focus extents range from x-2*r-1 to x+2*r+1, y-2*r-1 to y+2*r+1
int x = p.X - 31;
int y = p.Y - 31;
focusRect = new Rectangle(x, y, 64, 64);
// draw new focusRect
ps.QueueDraw(focusRect);
return (true);
}