/// <summary>
/// Action call for the Mouse-Move event. For the x-coordinate
/// supplied by the MouseEvent, the unscaled x and y coordinates
/// of the plotted function are determined and displayed
/// on the control.
/// </summary>
private void mouseMoved(object sender, MouseEventArgs e)
{
int Xh, Xc;
HTuple Ytup;
float Yh, Yc;
Xh = e.X;
if (PreX == Xh || Xh < originX || Xh > BorderRight || func == null)
{
return;
}
PreX = Xh;
Xc = (int)Math.Round((Xh - originX) / scaleX);
Ytup = func.GetYValueFunct1d(new HTuple(Xc), "zero");
Yc = (float)Ytup[0].D;
Yh = panelHeight - (Yc * scaleY);
gPanel.DrawImageUnscaled(functionMap, 0, 0);
gPanel.DrawLine(penCursor, Xh, 0, Xh, BorderTop);
gPanel.DrawLine(penCursor, originX, Yh, BorderRight + margin, Yh);
gPanel.DrawString(("X = " + Xc), drawFont, brushCS, panelWidth - margin, 10);
gPanel.DrawString(("Y = " + (int)Yc), drawFont, brushCS, panelWidth - margin, 20);
gPanel.Flush();
}
/// <summary>
/// Action call for the Mouse-Move event. For the x-coordinate
/// supplied by the MouseEvent, the unscaled x and y coordinates
/// of the plotted function are determined and displayed
/// on the control.
/// </summary>
private void panel_MouseMove(object sender, MouseEventArgs e)
{
int Xh, Xc;
HTuple Ytup;
float Yh, Yc;
Xh = e.X;
if (PreX == Xh || Xh < originX || Xh > BorderRight || func == null)
{
return;
}
PreX = Xh;
Xc = (int)Math.Round((Xh - originX) / scaleX);
Ytup = func.GetYValueFunct1d(new HTuple(Xc), "zero");
Yc = (float)Ytup[0].D;
Yh = panelHeight - (Yc * scaleY);
BufferedGraphicsContext ctx = BufferedGraphicsManager.Current;
BufferedGraphics bg = ctx.Allocate(gPanel, new Rectangle(new Point(0, 0), panel.Size));
Graphics gOfbuff = bg.Graphics;
Bitmap toDrawBeffor = new Bitmap(panel.Width, panel.Height);
Graphics gOfToDrawBeffor = Graphics.FromImage(toDrawBeffor);
// 自定义绘图
gOfToDrawBeffor.DrawLine(Pens.Blue, 0, 0, 1000, 1000);
gOfToDrawBeffor.DrawImageUnscaled(functionMap, 0, 0);
gOfToDrawBeffor.DrawLine(penCursor, Xh, 0, Xh, BorderTop);
gOfToDrawBeffor.DrawLine(penCursor, originX, Yh, BorderRight + margin, Yh);
string xStr = string.Format("{0}={1}", XName, Xc);
string yStr = string.Format("{0}={1}", YName, (int)Yc);
gOfToDrawBeffor.DrawString(xStr, drawFont, brushCS, panelWidth - margin * 4, 10);
gOfToDrawBeffor.DrawString(yStr, drawFont, brushCS, panelWidth - margin * 4, 20);
//双缓存到panel上
gOfbuff.Clear(panel.BackColor);
gOfbuff.DrawImage(toDrawBeffor, 0, 0);
bg.Render();
toDrawBeffor.Dispose();
gOfToDrawBeffor.Dispose();
gOfbuff.Dispose();
ctx.Dispose();
bg.Dispose();
}