/// <summary>
/// Reduce or increase contrast of the image with the given value.
/// </summary>
/// <param name="viewName">name of the view</param>
/// <param name="viewRangeName">name of the view range</param>
/// <param name="factor">factor that should be added to current contrast</param>
/// <returns>true if threshold could be set to new value, false if it is already max or min value</returns>
private bool updateContrast(string viewName, string viewRangeName, int factor)
{
if (io == null || io.GetView(viewName) as BrailleIOScreen == null)
{
return(false);
}
BrailleIOViewRange vr = ((BrailleIOScreen)io.GetView(viewName)).GetViewRange(viewRangeName);
int oldThreshold = 0;
int newThreshold = 0;
if (vr != null)
{
oldThreshold = vr.GetContrastThreshold();
newThreshold = vr.SetContrastThreshold(oldThreshold + factor);
}
io.RefreshDisplay();
if ((oldThreshold >= 255 || oldThreshold <= 0) && (newThreshold >= 255 || newThreshold <= 0))
{
return(false);
}
else
{
return(true);
}
}
/// <summary>
/// Synchronize the contrastThreshold and InvertImage value.
/// </summary>
/// <param name="oldvr">ViewRange whose values should be used in the new ViewRange.</param>
/// <param name="newvr">ViewRange that should get the values of the old ViewRange.</param>
private void syncContrastSettings(BrailleIOViewRange oldvr, BrailleIOViewRange newvr)
{
if (oldvr != null && newvr != null)
{
newvr.InvertImage = oldvr.InvertImage;
newvr.SetContrastThreshold(oldvr.GetContrastThreshold());
}
}
private void updateContrast(string viewName, string viewRangeName, int factor)
{
if (IO == null && IO.GetView(viewName) as BrailleIOScreen != null)
{
return;
}
// zoom in
BrailleIOViewRange vr = ((BrailleIOScreen)IO.GetView(viewName)).GetViewRange(viewRangeName);
if (vr != null)
{
vr.SetContrastThreshold(vr.GetContrastThreshold() + factor);
}
IO.RenderDisplay();
}
/// <summary>
/// Synchronize the contrastThreshold and InvertImage value.
/// </summary>
/// <param name="oldvr">ViewRange whose values should be used in the new ViewRange.</param>
/// <param name="newvr">ViewRange that should get the values of the old ViewRange.</param>
private void syncContrastSettings(BrailleIOViewRange oldvr, BrailleIOViewRange newvr)
{
if (oldvr != null && newvr != null)
{
newvr.InvertImage = oldvr.InvertImage;
newvr.SetContrastThreshold(oldvr.GetContrastThreshold());
}
}
