private void PictureBox1_MouseDown(object sender, MouseEventArgs e)
{
mouseDownPlot = MouseTracker.PlotUnderMouse(fig, e.Location);
if (mouseDownPlot == null)
{
return;
}
mouseDownPoint = e.Location;
mouseDownBmp = new Bitmap(pictureBox1.Image);
}
private void PictureBox1_MouseUp(object sender, MouseEventArgs e)
{
if (mouseDownPlot == MouseTracker.PlotUnderMouse(fig, e.Location))
{
if (e.Button == MouseButtons.Left)
{
MouseTracker.ZoomToPixel(mouseDownPlot, mouseDownPoint, e.Location);
}
if (e.Button == MouseButtons.Middle)
{
mouseDownPlot.axes.Set(-10, 10, -10, 10);
}
}
mouseDownPoint = new Point(-1, -1);
mouseDownBmp = null;
mouseDownPlot = null;
Render();
}
private void PictureBox1_MouseMove(object sender, MouseEventArgs e)
{
var plotUnderMouse = MouseTracker.PlotUnderMouse(fig, e.Location);
if (plotUnderMouse == null)
{
pictureBox1.Cursor = Cursors.Arrow;
}
else
{
pictureBox1.Cursor = Cursors.Cross;
}
if ((mouseDownPoint.X >= 0) && (mouseDownBmp != null) && (plotUnderMouse == mouseDownPlot))
{
int xMax = Math.Max(mouseDownPoint.X, e.Location.X);
int xMin = Math.Min(mouseDownPoint.X, e.Location.X);
int yMax = Math.Max(mouseDownPoint.Y, e.Location.Y);
int yMin = Math.Min(mouseDownPoint.Y, e.Location.Y);
Point selTopLeft = new Point(xMin, yMin);
Size selSize = new Size(xMax - xMin, yMax - yMin);
Rectangle selRect = new Rectangle(selTopLeft, selSize);
Color selColor = Color.FromArgb(100, 255, 0, 0);
Brush selBrush = new SolidBrush(selColor);
Pen selPen = new Pen(selColor);
Bitmap selBmp = new Bitmap(mouseDownBmp);
using (Graphics gfx = Graphics.FromImage(selBmp))
{
gfx.FillRectangle(selBrush, selRect);
gfx.DrawRectangle(selPen, selRect.X, selRect.Y, selRect.Width - 1, selRect.Height - 1);
}
pictureBox1.Image = selBmp;
}
}