private void ImageScrollViewer_OnSetSize(ImageScrollViewer viewer, MouseWheelEventArgs e)
{
Point point = e.GetPosition(imgContainer);
xScale = point.X / imgContainer.Width;
yScale = point.Y / imgContainer.Height;
if (e.Delta > 0 && (imgContainer.Width + SCROLL_SPEED <= MAX_WIDTH || imgContainer.Height + SCROLL_SPEED <= MAX_HEIGHT))
{
imgContainer.Width += SCROLL_SPEED;
imgContainer.Height += SCROLL_SPEED;
isScroll = true;
}
else if (e.Delta < 0 && (imgContainer.Width - SCROLL_SPEED >= MIN_WIDTH || imgContainer.Height - SCROLL_SPEED >= MIN_HEIGHT))
{
imgContainer.Width -= SCROLL_SPEED;
imgContainer.Height -= SCROLL_SPEED;
isScroll = true;
}
}
private void ImageScrollViewer_OnMouseMove(ImageScrollViewer viewer, MouseEventArgs e)
{
viewer.ScrollToHorizontalOffset(xOffset + orign.X - e.GetPosition(this).X);
viewer.ScrollToVerticalOffset(yOffset + orign.Y - e.GetPosition(this).Y);
}
private void ImageScrollViewer_OnMouseDown(ImageScrollViewer viewer, MouseEventArgs e)
{
orign = e.GetPosition(this);
xOffset = viewer.HorizontalOffset;
yOffset = viewer.VerticalOffset;
}