public void DispImageFit()
{
if (Image != null)
{
int hv_imageWidth, hv_imageHeight;
Image.GetImageSize(out hv_imageWidth, out hv_imageHeight);
double ratio_win = (double)WindowSize.Width / (double)WindowSize.Height;
double ratio_img = (double)hv_imageWidth / (double)hv_imageHeight;
int _beginRow, _begin_Col, _endRow, _endCol;
if (ratio_win >= ratio_img)
{
_beginRow = 0;
_endRow = hv_imageHeight - 1;
_begin_Col = (int)(-hv_imageWidth * (ratio_win / ratio_img - 1d) / 2d);
_endCol = (int)(hv_imageWidth + hv_imageWidth * (ratio_win / ratio_img - 1d) / 2d);
}
else
{
_begin_Col = 0;
_endCol = hv_imageWidth - 1;
_beginRow = (int)(-hv_imageHeight * (ratio_img / ratio_win - 1d) / 2d);
_endRow = (int)(hv_imageHeight + hv_imageHeight * (ratio_img / ratio_win - 1d) / 2d);
}
HalconWindow.SetPart(_beginRow, _begin_Col, _endRow, _endCol);
DispObj();
}
}
protected override void OnMouseMove(MouseEventArgs e)
{
if (e.Button == MouseButtons.Left && _move)
{
int offsetX = (int)((oldP.X - e.X) * imgscale);
int offsetY = (int)((oldP.Y - e.Y) * imgscale);
HalconWindow.SetPart(row1 + offsetY, col1 + offsetX, row2 + offsetY, col2 + offsetX);
DispObj();
}
base.OnMouseMove(e);
}
protected override void OnMouseWheel(MouseEventArgs e)
{
int x0, y0, x1, y1;
HalconWindow.GetPart(out x0, out y0, out x1, out y1);
imgscale = (float)(x1 - x0) / (float)(Height);
float px0 = y0 + e.X * imgscale;
float py0 = x0 + e.Y * imgscale;
imgscale = imgscale * (float)(1 - (float)e.Delta / 300f);
imgscale = imgscale < 0.05f ? 0.05f : imgscale;
imgscale = imgscale > 10f ? 10f : imgscale;
float px1 = e.X * imgscale;
float py1 = e.Y * imgscale;
float offsetX = px0 - px1;
float offsetY = py0 - py1;
HalconWindow.SetPart((int)offsetY, (int)offsetX, (int)(Height * imgscale + offsetY), (int)(Width * imgscale + offsetX));
DispObj();
base.OnMouseWheel(e);
}