protected override void OnMouseClick(MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
var pt = _mapTransform.MapToWorld(e.X, e.Y);
_mapTransform = new MapTransform(pt, _mapTransform.Resolution, Width, Height);
RenderToBuffer();
}
base.OnMouseClick(e);
}
protected override void OnMouseWheel(MouseEventArgs e)
{
if (_mapTransform == null)
{
return;
}
var res = _mapTransform.Resolution;
float factor;
if (e.Delta < 0)
{
factor = 1.2f;
}
else if (e.Delta > 0)
{
factor = 1 / 1.2f;
}
else
{
return;
}
var center = new PointF(picMap.Width * 0.5f, picMap.Height * 0.5f);
var point = new PointF(e.X, e.Y);
var dx = (center.X - point.X) * factor;
var dy = (center.Y - point.Y) * factor;
var newCenter = _mapTransform.MapToWorld(point.X + dx, point.Y + dy);
var transform = new MapTransform(newCenter, res * factor, picMap.Width, picMap.Height);
_mapTransform = transform;
RenderToBuffer();
base.OnMouseWheel(e);
}