/// <summary>
/// Is called when the mouse-wheel is moved.
/// </summary>
public override void OnMouseWheel(Plot.MouseEventArgs e)
{
double factor = Math.Pow(1.2, Math.Sign(e.Delta));
if (factor != 1)
{
double x = Model.x0 + (1 - factor) * e.X * (Model.x1 - Model.x0) / Bounds.Width;
double y = Model.y0 + (1 - factor) * (Bounds.Height - e.Y) * (Model.y1 - Model.y0) / Bounds.Height;
if (!(Model.x.fix && Model.y.fix))
{
if (Model.x.fix)
{
Model.SetRange(Model.x0, Model.x1, y, y + factor * (Model.y1 - Model.y0), Bounds);
}
else if (Model.y.fix)
{
Model.SetRange(x, x + factor * (Model.x1 - Model.x0), Model.y0, Model.y1, Bounds);
}
else
{
Model.SetRange(x, x + factor * (Model.x1 - Model.x0), y, y + factor * (Model.y1 - Model.y0), Bounds);
}
}
}
}
void ZoomCursor(Plot.MouseEventArgs e)
{
if (Parent != null && e.Button == MouseButtons.Left)
{
zoomIn = ((e.ModifierKeys & (Keys.Shift | Keys.Control)) == Keys.None);
if (zoomIn)
{
Parent.Cursor = SpecialCursors.EnlargeCursor;
}
else
{
Parent.Cursor = SpecialCursors.ShrinkCursor;
}
}
}
/// <summary>
/// Is called when a mouse-button is released.
/// </summary>
public override void OnMouseUp(Plot.MouseEventArgs e)
{
if (sx != -1 && sy != -1 && sw != 0 && sh != 0)
{
Zoom(zoomIn, new Rectangle(sx, sy, sw, sh));
}
sx = sy = -1; sw = sh = 0;
if (Parent != null)
{
if (PaintThread.DrawDone)
{
Parent.Cursor = Cursors.Cross;
}
else
{
Parent.Cursor = Cursors.WaitCursor;
}
}
}
/// <summary>
/// Is called when the mouse moves over the control.
/// </summary>
/// <param name="e"></param>
public override void OnMouseMove(Plot.MouseEventArgs e)
{
if (e.Button == MouseButtons.Right)
{
if (Parent != null)
{
Parent.Cursor = Cursors.SizeAll;
}
if (sx != -1)
{
MovePlot(e.X - sx, e.Y - sy);
}
sx = e.X;
sy = e.Y;
}
else if (Parent != null && (e.Button == MouseButtons.Left) && !(Model.x.fix && Model.y.fix))
{
ZoomCursor(e);
Graphics g = Parent.CreateGraphics();
Region clip;
if (sx == -1 || sy == -1)
{
sx = e.X; sy = e.Y; sw = sh = 0;
if (Model.x.fix)
{
sx = Bounds.X; sw = Bounds.Width;
}
if (Model.y.fix)
{
sy = Bounds.Y; sh = Bounds.Height;
}
}
int dw, dh;
dw = e.X - sx - sw;
dh = e.Y - sy - sh;
if (Model.x.fix)
{
dw = 0;
}
if (Model.y.fix)
{
dh = 0;
}
int x = Math.Min(sx, sx + sw); int y = Math.Min(sy, sy + sh);
int w = Math.Abs(sw); int h = Math.Abs(sh);
clip = new Region(new Rectangle(x, y, w + 1, 1));
clip.Union(new Rectangle(x, y, 1, h + 1));
clip.Union(new Rectangle(x + w, y, 1, h + 1));
clip.Union(new Rectangle(x, y + h, w + 1, 1));
sw += dw;
sh += dh;
x = Math.Min(sx, sx + sw); y = Math.Min(sy, sy + sh);
w = Math.Abs(sw); h = Math.Abs(sh);
clip.Union(new Rectangle(x, y, w + 1, 1));
clip.Union(new Rectangle(x, y, 1, h + 1));
clip.Union(new Rectangle(x + w, y, 1, h + 1));
clip.Union(new Rectangle(x, y + h, w + 1, 1));
g.SetClip(clip, CombineMode.Intersect);
g.FillRectangle(white, sx, sy, w + 1, h + 1);
g.SmoothingMode = SmoothingMode.AntiAlias;
Draw(g, new Rectangle(0, 0, Parent.Bounds.Width, Parent.Bounds.Height));
}
ZoomCursor(e);
double mx = WorldCoordinateX(e.X);
double my = WorldCoordinateY(e.Y);
double mz = 0;
if (Model != null)
{
int i = 0;
while (i < Model.Count && !(Model[i] is Function2DItem))
{
i++;
}
if (i < Model.Count)
{
try {
mz = ((Function2DItem)Model[i]).f(mx, my);
} catch { }
}
}
FireNotifyCursor(mx, my, mz);
}
/// <summary>
/// Is called when a mouse button is pressed.
/// </summary>
/// <param name="e"></param>
public override void OnMouseDown(Plot.MouseEventArgs e)
{
button = e.Button;
ZoomCursor(e);
}
