public override bool OnButtonPressed(ButtonEventArgs args, PlotCanvas pc)
{
// Only start scaling if mouse is inside plot area (excluding axes)
Rectangle area = pc.PlotAreaBoundingBoxCache;
if (area.Contains(args.Position))
{
scaling = true;
lastPoint = new Point(args.X, args.Y);
if (args.Button == PointerButton.Left)
{
if (Horizontal)
{
; //pc.plotCursor = CursorType.LeftRight;
}
if (Vertical)
{
; //pc.plotCursor = CursorType.UpDown;
}
if (Horizontal && Vertical)
{
; //pc.plotCursor = CursorType.Zoom;
}
}
// evaluate focusPoint about which axis is expanded
focusX = (double)(args.X - area.Left) / (double)area.Width;
focusY = (double)(area.Bottom - args.Y) / (double)area.Height;
}
return(false);
}
public override bool OnMouseMoved(MouseMovedEventArgs args, PlotCanvas pc)
{
Rectangle area = pc.PlotAreaBoundingBoxCache;
if (dragging && physicalAxis != null)
{
pc.CacheAxes();
double dX = args.X - lastPoint.X;
double dY = args.Y - lastPoint.Y;
lastPoint = new Point(args.X, args.Y);
double length = physicalAxis.PhysicalLength;
if (translateX)
{
double xShift = -dX / length;
pc.TranslateXAxes(xShift);
}
if (translateY)
{
double yShift = +dY / length;
pc.TranslateYAxes(yShift);
}
return(true);
}
return(false);
}
public override bool OnMouseMoved(MouseMovedEventArgs args, PlotCanvas pc)
{
double X = args.X;
double Y = args.Y;
if (selectionActive)
{
// note last selection rectangle
Rectangle lastSelection = selection;
Rectangle bounds = pc.PlotAreaBoundingBoxCache;
// clip selection rectangle to PlotArea
X = Math.Max(X, bounds.Left);
X = Math.Min(X, bounds.Right);
Y = Math.Max(Y, bounds.Top);
Y = Math.Min(Y, bounds.Bottom);
endPoint.X = X;
endPoint.Y = Y;
selection = FromPoints(startPoint, endPoint);
pc.Canvas.QueueDraw(lastSelection);
//Console.WriteLine ("Erase: {0} {1} {2} {3} ", lastSelection.X, lastSelection.Y, lastSelection.Width, lastSelection.Height);
pc.Canvas.QueueDraw(selection);
}
return(false);
}
public override bool OnMouseMoved(MouseMovedEventArgs args, PlotCanvas pc)
{
Rectangle area = pc.PlotAreaBoundingBoxCache;
if (dragging)
{
pc.CacheAxes();
double dX = args.X - lastPoint.X; // distance mouse has moved
double dY = args.Y - lastPoint.Y;
lastPoint = new Point(args.X, args.Y);
// Axis translation required
double xShift = -dX / area.Width;
double yShift = +dY / area.Height;
if (Horizontal)
{
pc.TranslateXAxes(xShift);
}
if (Vertical)
{
pc.TranslateYAxes(yShift);
}
return(true);
}
return(false);
}
public override bool OnMouseMoved(MouseMovedEventArgs args, PlotCanvas pc)
{
Rectangle area = pc.PlotAreaBoundingBoxCache;
if (scaling)
{
pc.CacheAxes();
double dX = args.X - lastPoint.X; // distance mouse has moved
double dY = args.Y - lastPoint.Y;
lastPoint = new Point(args.X, args.Y);
// Alt key reduces sensitivity
double factor = Sensitivity;
if (key == Key.AltLeft || key == Key.AltRight)
{
factor *= 0.25; // arbitrary change
}
double xProportion = +dX * factor / area.Width;
double yProportion = -dY * factor / area.Height;
if (Horizontal)
{
pc.ZoomXAxes(xProportion, focusX);
}
if (Vertical)
{
pc.ZoomYAxes(yProportion, focusY);
}
return(true);
}
return(false);
}
public override bool OnMouseExited(EventArgs args, PlotCanvas pc)
{
if (selectionActive)
{
pc.Canvas.QueueDraw(selection);
selectionActive = false;
}
return(false);
}
public override bool OnButtonReleased(ButtonEventArgs args, PlotCanvas pc)
{
if (scaling)
{
lastPoint = unset;
scaling = false;
//pc.plotCursor = CursorType.LeftPointer;
}
return(false);
}
/// <summary>
/// OnButtonPressed method for AxisScale interaction
/// </summary>
public override bool OnButtonPressed(ButtonEventArgs args, PlotCanvas pc)
{
// if the mouse is inside the plot area (the tick marks may be here,
// and are counted as part of the axis), then *don't* invoke scaling
if (pc.PlotAreaBoundingBoxCache.Contains(args.X, args.Y))
{
return(false);
}
if (args.Button == PointerButton.Left)
{
// see if hit with axis. NB Only one axis object will be returned
ArrayList objects = pc.HitTest(new Point(args.X, args.Y));
foreach (object o in objects)
{
if (o is Axis)
{
dragging = true;
axis = (Axis)o;
if (pc.PhysicalXAxis1Cache.Axis == axis)
{
physicalAxis = pc.PhysicalXAxis1Cache;
//pc.plotCursor = CursorType.LeftRight;
}
else if (pc.PhysicalXAxis2Cache.Axis == axis)
{
physicalAxis = pc.PhysicalXAxis2Cache;
//ps.plotCursor = CursorType.LeftRight;
}
else if (pc.PhysicalYAxis1Cache.Axis == axis)
{
physicalAxis = pc.PhysicalYAxis1Cache;
//pc.plotCursor = CursorType.UpDown;
}
else if (pc.PhysicalYAxis2Cache.Axis == axis)
{
physicalAxis = pc.PhysicalYAxis2Cache;
//pc.plotCursor = CursorType.UpDown;
}
startPoint = new Point(args.X, args.Y);
lastPoint = startPoint;
// evaluate focusRatio about which axis is expanded
double x = startPoint.X - physicalAxis.PhysicalMin.X;
double y = startPoint.Y - physicalAxis.PhysicalMin.Y;
double r = Math.Sqrt(x * x + y * y);
focusRatio = r / physicalAxis.PhysicalLength;
return(false);
}
}
}
return(false);
}
/// <summary>
/// OnButtonReleased method for AxisDrag interaction
/// </summary>
public override bool OnButtonReleased(ButtonEventArgs args, PlotCanvas pc)
{
if (dragging)
{
physicalAxis = null;
lastPoint = unset;
dragging = false;
translateX = false;
translateY = false;
}
return(false);
}
/// <summary>
/// OnButtonReleased method for AxisScale interaction
/// </summary>
public override bool OnButtonReleased(ButtonEventArgs args, PlotCanvas pc)
{
if (dragging)
{
dragging = false;
axis = null;
physicalAxis = null;
lastPoint = new Point();
//pc.plotCursor = CursorType.LeftPointer;
}
return(false);
}
public override bool OnButtonPressed(ButtonEventArgs args, PlotCanvas pc)
{
// Only start selection if mouse is inside plot area (excluding axes)
Rectangle area = pc.PlotAreaBoundingBoxCache;
if (args.Button == PointerButton.Left && area.Contains(args.Position))
{
selectionActive = true;
startPoint.X = args.X;
startPoint.Y = args.Y;
endPoint = startPoint;
}
return(false);
}
/// <summary>
/// Handler for KeyPressed events
/// </summary>
/// <param name="args">the Xwt.KeyEventArgs</param>
/// <param name="pc">the PlotCanvas</param>
/// <returns>
/// true if the underlying (cached) plot requires redrawing, otherwise false
/// </returns>
public override bool OnKeyPressed(KeyEventArgs args, PlotCanvas pc)
{
double factor = Sensitivity;
Key key = args.Key;
ModifierKeys modifiers = args.Modifiers;
if ((modifiers & ModifierKeys.Alt) != 0) {
factor = Sensitivity * altFactor;
}
if (key == Key.Home || key == Key.NumPadHome) {
pc.SetOriginalDimensions ();
return true;
}
if (key == Key.Left || key == Key.NumPadLeft) {
pc.CacheAxes();
pc.TranslateXAxes (factor * left);
return true;
}
if (key == Key.Right || key == Key.NumPadRight) {
pc.CacheAxes();
pc.TranslateXAxes (factor*right);
return true;
}
if (key == Key.Up || key == Key.NumPadUp) {
pc.CacheAxes ();
pc.TranslateYAxes (factor*up);
return true;
}
if (key == Key.Down || key == Key.NumPadDown) {
pc.CacheAxes ();
pc.TranslateYAxes (factor*down);
return true;
}
if (key == Key.Plus || key == Key.NumPadAdd) {
pc.CacheAxes ();
pc.ZoomXAxes (zoomIn*factor, symmetrical);
pc.ZoomYAxes (zoomIn*factor, symmetrical);
return true;
}
if (key == Key.Minus || key == Key.NumPadSubtract) {
pc.CacheAxes ();
pc.ZoomXAxes (zoomOut*factor, symmetrical);
pc.ZoomYAxes (zoomOut*factor, symmetrical);
return true;
}
return false;
}
/// <summary>
/// OnButtonPressed method for AxisDrag interaction
/// </summary>
public override bool OnButtonPressed(ButtonEventArgs args, PlotCanvas pc)
{
// if the mouse is inside the plot area (the tick marks may be here,
// and are counted as part of the axis), then *don't* invoke scaling
if (pc.PlotAreaBoundingBoxCache.Contains(args.X, args.Y))
{
return(false);
}
if (args.Button == PointerButton.Left)
{
// see if hit with axis. NB Only one axis object will be returned
ArrayList objects = pc.HitTest(new Point(args.X, args.Y));
foreach (object o in objects)
{
if (o is Axis)
{
dragging = true;
Axis axis = (Axis)o;
if (pc.PhysicalXAxis1Cache.Axis == axis)
{
physicalAxis = pc.PhysicalXAxis1Cache;
translateX = true;
}
else if (pc.PhysicalXAxis2Cache.Axis == axis)
{
physicalAxis = pc.PhysicalXAxis2Cache;
translateX = true;
}
else if (pc.PhysicalYAxis1Cache.Axis == axis)
{
physicalAxis = pc.PhysicalYAxis1Cache;
translateY = true;
}
else if (pc.PhysicalYAxis2Cache.Axis == axis)
{
physicalAxis = pc.PhysicalYAxis2Cache;
translateY = true;
}
lastPoint = new Point(args.X, args.Y);
return(false);
}
}
}
return(false);
}
public override bool OnButtonPressed(ButtonEventArgs args, PlotCanvas pc)
{
// Only start drag if mouse is inside plot area (excluding axes)
Rectangle area = pc.PlotAreaBoundingBoxCache;
if (area.Contains(args.Position))
{
dragging = true;
lastPoint = new Point(args.X, args.Y);
if (args.Button == PointerButton.Left)
{
if (Horizontal || Vertical)
{
//pc.plotCursor = CursorType.Hand;
}
}
}
return(false);
}
/// <summary>
/// Mouse Scroll (wheel) method for PlotZoom interaction
/// </summary>
public override bool OnMouseScrolled(MouseScrolledEventArgs args, PlotCanvas pc)
{
double proportion = 0.1 * Sensitivity; // use initial zoom of 10%
double focusX = 0.5, focusY = 0.5; // default focus point
double direction = 1;
if (args.Direction == ScrollDirection.Down)
{
direction = -1;
}
// Zoom direction is +1 for Up/ZoomIn, or -1 for Down/ZoomOut
proportion *= -direction;
// delete previous focusPoint drawing
pc.Canvas.QueueDraw(focusRect);
Rectangle area = pc.PlotAreaBoundingBoxCache;
if (area.Contains(args.X, args.Y))
{
focus.X = args.X;
focus.Y = args.Y;
focusX = (double)(args.X - area.Left) / (double)area.Width;
focusY = (double)(area.Bottom - args.Y) / (double)area.Height;
}
// Zoom in/out for all defined axes
pc.CacheAxes();
pc.ZoomXAxes(proportion, focusX);
pc.ZoomYAxes(proportion, focusY);
double x = focus.X - 32;
double y = focus.Y - 32;
focusRect = new Rectangle(x, y, 64, 64);
// draw new focusRect
pc.Canvas.QueueDraw(focusRect);
return(true);
}
/// <summary>
/// OnMouseMoved method for AxisScale interaction
/// </summary>
public override bool OnMouseMoved(MouseMovedEventArgs args, PlotCanvas pc)
{
if (dragging && physicalAxis != null)
{
pc.CacheAxes();
double dX = (args.X - lastPoint.X);
double dY = (args.Y - lastPoint.Y);
lastPoint = new Point(args.X, args.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);
}
public override bool OnButtonReleased(ButtonEventArgs args, PlotCanvas pc)
{
bool modified = false;
// delete previous overlay rectangle
pc.Canvas.QueueDraw(selection);
if (selectionActive)
{
selectionActive = false;
Rectangle bounds = pc.PlotAreaBoundingBoxCache;
if (!bounds.Contains(endPoint))
{
// MouseUp outside plotArea - cancel selection
modified = false;
}
else
{
pc.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;
pc.DefineXAxes(xMinProp, xMaxProp);
pc.DefineYAxes(yMinProp, yMaxProp);
modified = true;
}
}
return(modified);
}
/// <summary>
/// OnButtonPressed method for AxisDrag interaction
/// </summary>
public override bool OnButtonPressed(ButtonEventArgs args, PlotCanvas pc)
{
// if the mouse is inside the plot area (the tick marks may be here,
// and are counted as part of the axis), then *don't* invoke scaling
if (pc.PlotAreaBoundingBoxCache.Contains(args.X, args.Y)) {
return false;
}
if (args.Button == PointerButton.Left) {
// see if hit with axis. NB Only one axis object will be returned
ArrayList objects = pc.HitTest (new Point(args.X, args.Y));
foreach (object o in objects) {
if (o is Axis) {
dragging = true;
Axis axis = (Axis)o;
if (pc.PhysicalXAxis1Cache.Axis == axis) {
physicalAxis = pc.PhysicalXAxis1Cache;
translateX = true;
}
else if (pc.PhysicalXAxis2Cache.Axis == axis) {
physicalAxis = pc.PhysicalXAxis2Cache;
translateX = true;
}
else if (pc.PhysicalYAxis1Cache.Axis == axis) {
physicalAxis = pc.PhysicalYAxis1Cache;
translateY = true;
}
else if (pc.PhysicalYAxis2Cache.Axis == axis) {
physicalAxis = pc.PhysicalYAxis2Cache;
translateY = true;
}
lastPoint = new Point (args.X, args.Y);
return false;
}
}
}
return false;
}
/// <summary>
/// MouseMove method for PlotScroll
/// </summary>
public override bool OnMouseMoved(MouseMovedEventArgs args, PlotCanvas pc)
{
// delete previous focusPoint drawing
pc.Canvas.QueueDraw(focusRect);
return(false);
}
public override bool OnMouseMoved(MouseMovedEventArgs args, PlotCanvas pc)
{
Rectangle area = pc.PlotAreaBoundingBoxCache;
if (scaling) {
pc.CacheAxes();
double dX = args.X - lastPoint.X; // distance mouse has moved
double dY = args.Y - lastPoint.Y;
lastPoint = new Point (args.X, args.Y);
// Alt key reduces sensitivity
double factor = Sensitivity;
if (key == Key.AltLeft || key == Key.AltRight) {
factor *= 0.25; // arbitrary change
}
double xProportion = +dX*factor/area.Width;
double yProportion = -dY*factor/area.Height;
if (Horizontal) {
pc.ZoomXAxes (xProportion, focusX);
}
if (Vertical) {
pc.ZoomYAxes (yProportion, focusY);
}
return true;
}
return false;
}
public override bool OnKeyReleased(KeyEventArgs args, PlotCanvas pc)
{
key = args.Key;
return false;
}
public override bool OnButtonPressed(ButtonEventArgs args, PlotCanvas pc)
{
// Only start scaling if mouse is inside plot area (excluding axes)
Rectangle area = pc.PlotAreaBoundingBoxCache;
if (area.Contains (args.Position)) {
scaling = true;
lastPoint = new Point (args.X, args.Y);
if (args.Button == PointerButton.Left) {
if (Horizontal) {
;//pc.plotCursor = CursorType.LeftRight;
}
if (Vertical) {
;//pc.plotCursor = CursorType.UpDown;
}
if (Horizontal && Vertical) {
;//pc.plotCursor = CursorType.Zoom;
}
}
// evaluate focusPoint about which axis is expanded
focusX = (double)(args.X - area.Left)/(double)area.Width;
focusY = (double)(area.Bottom - args.Y)/(double)area.Height;
}
return false;
}
public override bool OnMouseExited(EventArgs args, PlotCanvas pc)
{
if (selectionActive) {
pc.Canvas.QueueDraw (selection);
selectionActive = false;
}
return false;
}
public override bool OnMouseMoved(MouseMovedEventArgs args, PlotCanvas pc)
{
Rectangle area = pc.PlotAreaBoundingBoxCache;
if (dragging && physicalAxis != null) {
pc.CacheAxes();
double dX = args.X - lastPoint.X;
double dY = args.Y - lastPoint.Y;
lastPoint = new Point (args.X, args.Y);
double length = physicalAxis.PhysicalLength;
if (translateX) {
double xShift = -dX / length;
pc.TranslateXAxes (xShift);
}
if (translateY) {
double yShift = +dY / length;
pc.TranslateYAxes (yShift);
}
return true;
}
return false;
}
/// <summary>
/// MouseMove method for PlotScroll
/// </summary>
public override bool OnMouseMoved(MouseMovedEventArgs args, PlotCanvas pc)
{
// delete previous focusPoint drawing
pc.Canvas.QueueDraw (focusRect);
return false;
}
public override bool OnButtonPressed(ButtonEventArgs args, PlotCanvas pc)
{
// Only start selection if mouse is inside plot area (excluding axes)
Rectangle area = pc.PlotAreaBoundingBoxCache;
if (args.Button == PointerButton.Left && area.Contains (args.Position)) {
selectionActive = true;
startPoint.X = args.X;
startPoint.Y = args.Y;
endPoint = startPoint;
}
return false;
}
public virtual bool OnMouseScrolled(MouseScrolledEventArgs args, PlotCanvas pc)
{
return(false);
}
public virtual bool OnMouseExited(EventArgs args, PlotCanvas pc)
{
return(false);
}
public override bool OnMouseMoved(MouseMovedEventArgs args, PlotCanvas pc)
{
double X = args.X;
double Y = args.Y;
if (selectionActive) {
// note last selection rectangle
Rectangle lastSelection = selection;
Rectangle bounds = pc.PlotAreaBoundingBoxCache;
// clip selection rectangle to PlotArea
X = Math.Max(X, bounds.Left);
X = Math.Min(X, bounds.Right);
Y = Math.Max(Y, bounds.Top);
Y = Math.Min(Y, bounds.Bottom);
endPoint.X = X;
endPoint.Y = Y;
selection = FromPoints (startPoint, endPoint);
pc.Canvas.QueueDraw (lastSelection);
//Console.WriteLine ("Erase: {0} {1} {2} {3} ", lastSelection.X, lastSelection.Y, lastSelection.Width, lastSelection.Height);
pc.Canvas.QueueDraw (selection);
}
return false;
}
/// <summary>
/// Mouse Scroll (wheel) method for PlotZoom interaction
/// </summary>
public override bool OnMouseScrolled(MouseScrolledEventArgs args, PlotCanvas pc)
{
double proportion = 0.1*Sensitivity; // use initial zoom of 10%
double focusX = 0.5, focusY = 0.5; // default focus point
double direction = 1;
if (args.Direction == ScrollDirection.Down) {
direction = -1;
}
// Zoom direction is +1 for Up/ZoomIn, or -1 for Down/ZoomOut
proportion *= -direction;
// delete previous focusPoint drawing
pc.Canvas.QueueDraw (focusRect);
Rectangle area = pc.PlotAreaBoundingBoxCache;
if (area.Contains(args.X, args.Y)) {
focus.X = args.X;
focus.Y = args.Y;
focusX = (double)(args.X - area.Left)/(double)area.Width;
focusY = (double)(area.Bottom - args.Y)/(double)area.Height;
}
// Zoom in/out for all defined axes
pc.CacheAxes();
pc.ZoomXAxes (proportion,focusX);
pc.ZoomYAxes (proportion,focusY);
double x = focus.X-32;
double y = focus.Y-32;
focusRect = new Rectangle (x, y, 64, 64);
// draw new focusRect
pc.Canvas.QueueDraw (focusRect);
return (true);
}
/// <summary>
/// Handler for KeyRelease events
/// </summary>
/// <param name="key">the NPlot key enumeration</param>
/// <param name="pc">the PlotCanvas</param>
/// <returns></returns>
public override bool OnKeyReleased(KeyEventArgs args, PlotCanvas pc)
{
return false;
}
/// <summary>
/// OnButtonReleased method for AxisScale interaction
/// </summary>
public override bool OnButtonReleased(ButtonEventArgs args, PlotCanvas pc)
{
if (dragging) {
dragging = false;
axis = null;
physicalAxis = null;
lastPoint = new Point();
//pc.plotCursor = CursorType.LeftPointer;
}
return false;
}
/// <summary>
/// OnButtonReleased method for AxisDrag interaction
/// </summary>
public override bool OnButtonReleased(ButtonEventArgs args, PlotCanvas pc)
{
if (dragging) {
physicalAxis = null;
lastPoint = unset;
dragging = false;
translateX = false;
translateY = false;
}
return false;
}
public override bool OnButtonReleased(ButtonEventArgs args, PlotCanvas pc)
{
bool modified = false;
// delete previous overlay rectangle
pc.Canvas.QueueDraw (selection);
if (selectionActive) {
selectionActive = false;
Rectangle bounds = pc.PlotAreaBoundingBoxCache;
if (!bounds.Contains(endPoint)) {
// MouseUp outside plotArea - cancel selection
modified = false;
}
else {
pc.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;
pc.DefineXAxes (xMinProp, xMaxProp);
pc.DefineYAxes (yMinProp, yMaxProp);
modified = true;
}
}
return modified;
}
PlotCanvas plotCanvas; // To allow access to parent PlotCanvas
/// <summary>
/// Creates a new DrawingSurface and saves a reference to the PlotSurface
/// </summary>
internal DrawingSurface(PlotCanvas pc) : base()
{
plotCanvas = pc;
}
public virtual bool OnButtonReleased(ButtonEventArgs args, PlotCanvas pc)
{
return(false);
}
public override bool OnKeyReleased(KeyEventArgs args, PlotCanvas pc)
{
key = args.Key;
return(false);
}
public virtual bool OnKeyReleased(KeyEventArgs args, PlotCanvas pc)
{
return(false);
}
/// <summary>
/// OnButtonPressed method for AxisScale interaction
/// </summary>
public override bool OnButtonPressed(ButtonEventArgs args, PlotCanvas pc)
{
// if the mouse is inside the plot area (the tick marks may be here,
// and are counted as part of the axis), then *don't* invoke scaling
if (pc.PlotAreaBoundingBoxCache.Contains(args.X, args.Y)) {
return false;
}
if (args.Button == PointerButton.Left) {
// see if hit with axis. NB Only one axis object will be returned
ArrayList objects = pc.HitTest (new Point(args.X, args.Y));
foreach (object o in objects) {
if (o is Axis) {
dragging = true;
axis = (Axis)o;
if (pc.PhysicalXAxis1Cache.Axis == axis) {
physicalAxis = pc.PhysicalXAxis1Cache;
//pc.plotCursor = CursorType.LeftRight;
}
else if (pc.PhysicalXAxis2Cache.Axis == axis) {
physicalAxis = pc.PhysicalXAxis2Cache;
//ps.plotCursor = CursorType.LeftRight;
}
else if (pc.PhysicalYAxis1Cache.Axis == axis) {
physicalAxis = pc.PhysicalYAxis1Cache;
//pc.plotCursor = CursorType.UpDown;
}
else if (pc.PhysicalYAxis2Cache.Axis == axis) {
physicalAxis = pc.PhysicalYAxis2Cache;
//pc.plotCursor = CursorType.UpDown;
}
startPoint = new Point (args.X, args.Y);
lastPoint = startPoint;
// evaluate focusRatio about which axis is expanded
double x = startPoint.X - physicalAxis.PhysicalMin.X;
double y = startPoint.Y - physicalAxis.PhysicalMin.Y;
double r = Math.Sqrt(x*x + y*y);
focusRatio = r/physicalAxis.PhysicalLength;
return false;
}
}
}
return false;
}
/// <summary>
/// OnMouseMoved method for AxisScale interaction
/// </summary>
public override bool OnMouseMoved(MouseMovedEventArgs args, PlotCanvas pc)
{
if (dragging && physicalAxis != null) {
pc.CacheAxes();
double dX = (args.X - lastPoint.X);
double dY = (args.Y - lastPoint.Y);
lastPoint = new Point (args.X, args.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;
}
public override bool OnMouseMoved(MouseMovedEventArgs args, PlotCanvas pc)
{
Rectangle area = pc.PlotAreaBoundingBoxCache;
if (dragging) {
pc.CacheAxes();
double dX = args.X - lastPoint.X; // distance mouse has moved
double dY = args.Y - lastPoint.Y;
lastPoint = new Point (args.X, args.Y);
// Axis translation required
double xShift = -dX / area.Width;
double yShift = +dY / area.Height;
if (Horizontal) {
pc.TranslateXAxes (xShift);
}
if (Vertical) {
pc.TranslateYAxes (yShift);
}
return true;
}
return false;
}
public override bool OnButtonReleased(ButtonEventArgs args, PlotCanvas pc)
{
if (dragging) {
lastPoint = unset;
dragging = false;
//pc.plotCursor = CursorType.LeftPointer;
}
return false;
}
public virtual bool OnMouseScrolled(MouseScrolledEventArgs args, PlotCanvas pc)
{
return false;
}
public override bool OnButtonPressed(ButtonEventArgs args, PlotCanvas pc)
{
// Only start drag if mouse is inside plot area (excluding axes)
Rectangle area = pc.PlotAreaBoundingBoxCache;
if (area.Contains (args.Position)) {
dragging = true;
lastPoint = new Point (args.X, args.Y);
if (args.Button == PointerButton.Left) {
if (Horizontal || Vertical) {
//pc.plotCursor = CursorType.Hand;
}
}
}
return false;
}
public virtual bool OnButtonReleased(ButtonEventArgs args, PlotCanvas pc)
{
return false;
}
public virtual bool OnKeyReleased(KeyEventArgs args, PlotCanvas pc)
{
return false;
}
public virtual bool OnMouseEntered(EventArgs args, PlotCanvas pc)
{
return false;
}
PlotCanvas plotCanvas; // To allow access to parent PlotCanvas
#endregion Fields
#region Constructors
/// <summary>
/// Creates a new DrawingSurface and saves a reference to the PlotSurface
/// </summary>
internal DrawingSurface(PlotCanvas pc)
: base()
{
plotCanvas = pc;
}
/// <summary>
/// Handler for KeyPressed events
/// </summary>
/// <param name="args">the Xwt.KeyEventArgs</param>
/// <param name="pc">the PlotCanvas</param>
/// <returns>
/// true if the underlying (cached) plot requires redrawing, otherwise false
/// </returns>
public override bool OnKeyPressed(KeyEventArgs args, PlotCanvas pc)
{
double factor = Sensitivity;
Key key = args.Key;
ModifierKeys modifiers = args.Modifiers;
if ((modifiers & ModifierKeys.Alt) != 0) {
factor = Sensitivity * altFactor;
}
if (key == Key.Home || key == Key.NumPadHome) {
pc.SetOriginalDimensions ();
return true;
}
if (key == Key.Left || key == Key.NumPadLeft) {
pc.CacheAxes();
pc.TranslateXAxes (factor * left);
return true;
}
if (key == Key.Right || key == Key.NumPadRight) {
pc.CacheAxes();
pc.TranslateXAxes (factor*right);
return true;
}
if (key == Key.Up || key == Key.NumPadUp) {
pc.CacheAxes ();
pc.TranslateYAxes (factor*up);
return true;
}
if (key == Key.Down || key == Key.NumPadDown) {
pc.CacheAxes ();
pc.TranslateYAxes (factor*down);
return true;
}
if (key == Key.Plus || key == Key.NumPadAdd) {
pc.CacheAxes ();
pc.ZoomXAxes (zoomIn*factor, symmetrical);
pc.ZoomYAxes (zoomIn*factor, symmetrical);
return true;
}
if (key == Key.Minus || key == Key.NumPadSubtract) {
pc.CacheAxes ();
pc.ZoomXAxes (zoomOut*factor, symmetrical);
pc.ZoomYAxes (zoomOut*factor, symmetrical);
return true;
}
return false;
}
