/// <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());
}
}
BrailleIOViewRange getMainScreenCenter2Region(int left, int top, int width, int height)
{
BrailleIOViewRange center2 = new BrailleIOViewRange(left, top, width, height);
center2.SetZoom(-1);
center2.SetBorder(0);
center2.SetContrastThreshold(STANDARD_CONTRAST_THRESHOLD);
center2.SetMargin(7, 0);
return(center2);
}
// string path = "";
private void showExample()
{
BrailleIOScreen s = new BrailleIOScreen();
#region Center Region
#region screenshot
Image bmp = captureScreen();
#endregion
BrailleIOViewRange center = new BrailleIOViewRange(0, 7, 120, 46, new bool[120, 40]);
//center.Move(1,1);
center.SetBitmap(bmp);
center.SetZoom(-1);
center.SetBorder(0);
center.SetContrastThreshold(150);
center.ShowScrollbars = true;
s.AddViewRange("center", center);
#endregion
#region Top Reagion
BrailleIOViewRange top = new BrailleIOViewRange(0, 0, 120, 7);
top.SetBorder(0, 0, 1);
top.SetMargin(0, 0, 1);
top.SetPadding(0, 0, 1);
top.SetText("ABCDEFGHIJKLMNOPQRSTUVWXYZ\r\nabcdefghijklmnopqrstuvwxyz\r\n0123456789!\"#$%&<=>?@©®\r\n*+-~:;[],.'^_`(){}/|\\r\nß\r\n%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%\r\n");
top.SetText("Tactile screen capture");
s.AddViewRange("top", top);
#endregion
#region Bottom Reagion
BrailleIOViewRange bottom = new BrailleIOViewRange(0, 53, 120, 7);
bottom.SetBorder(1, 0, 0);
bottom.SetMargin(1, 0, 0);
bottom.SetPadding(1, 0, 0);
bottom.SetText("Detail area: status messages can be shown");
s.AddViewRange("bottom", bottom);
#endregion
io.AddView(BS_MAIN_NAME, s);
io.ShowView(BS_MAIN_NAME);
io.RenderDisplay();
}
/// <summary>
/// Change contrast of the image to the given value.
/// </summary>
/// <param name="viewName">name of the view</param>
/// <param name="viewRangeName">name of the view range</param>
/// <param name="contrast">new contrast value (should be between 0 and 255)</param>
private void setContrast(string viewName, string viewRangeName, int contrast)
{
if (io == null || io.GetView(viewName) as BrailleIOScreen == null)
{
return;
}
BrailleIOViewRange vr = ((BrailleIOScreen)io.GetView(viewName)).GetViewRange(viewRangeName);
if (vr != null)
{
vr.SetContrastThreshold(contrast);
}
io.RefreshDisplay(true);
}
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>
/// Shows the center region in full screen (other regions are set invisible).
/// </summary>
/// <param name="width">The width.</param>
/// <param name="height">The height.</param>
/// <returns></returns>
BrailleIOScreen buildFullScreen(int width, int height)
{
BrailleIOScreen fullScreen = new BrailleIOScreen(BS_FULLSCREEN_NAME);
BrailleIOViewRange center = new BrailleIOViewRange(0, 0, width, height);
center.SetZoom(-1);
center.SetBorder(0);
center.SetContrastThreshold(STANDARD_CONTRAST_THRESHOLD);
center.ShowScrollbars = true;
fullScreen.AddViewRange(VR_CENTER_NAME, center);
if (io != null)
{
io.AddView(BS_FULLSCREEN_NAME, fullScreen);
}
fullScreen.SetVisibility(false);
return(fullScreen);
}
// string path = "";
private void showExample()
{
BrailleIOScreen s = new BrailleIOScreen();
#region Center Region
#region screenshot
Image bmp = captureScreen();
#endregion
BrailleIOViewRange center = new BrailleIOViewRange(0, 0, 120, 60, new bool[120, 40]);
center.SetMargin(7, 0, 0);
center.Move(1, 1);
center.SetBitmap(bmp);
center.SetZoom(-1);
center.SetBorder(0);
center.SetContrastThreshold(150);
s.AddViewRange("center", center);
#endregion
#region Top Region
BrailleIOViewRange top = new BrailleIOViewRange(0, 0, 120, 7, new bool[0, 0]);
top.SetBorder(0, 0, 1);
top.SetMargin(0, 0, 1);
top.SetPadding(0, 0, 1);
top.SetText("ABCDEFGHIJKLMNOPQRSTUVWXYZ\r\nabcdefghijklmnopqrstuvwxyz\r\n0123456789!\"#$%&<=>?@©®\r\n*+-~:;[],.'^_`(){}/|\\r\nß\r\n%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%\r\n");
top.SetText("Tactile screen capture");
s.AddViewRange("top", top);
#endregion
IO.AddView(BS_MAIN_NAME, s);
IO.ShowView(BS_MAIN_NAME);
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());
}
}
BrailleIOViewRange getMainScreenCenter2Region(int left, int top, int width, int height)
{
BrailleIOViewRange center2 = new BrailleIOViewRange(left, top, width, height);
center2.SetZoom(-1);
center2.SetBorder(0);
center2.SetContrastThreshold(STANDARD_CONTRAST_THRESHOLD);
center2.SetMargin(7, 0);
return center2;
}
/// <summary>
/// Shows the center region in full screen (other regions are set invisible).
/// </summary>
/// <param name="width">The width.</param>
/// <param name="height">The height.</param>
/// <returns></returns>
BrailleIOScreen buildFullScreen(int width, int height)
{
BrailleIOScreen fullScreen = new BrailleIOScreen(BS_FULLSCREEN_NAME);
BrailleIOViewRange center = new BrailleIOViewRange(0, 0, width, height);
center.SetZoom(-1);
center.SetBorder(0);
center.SetContrastThreshold(STANDARD_CONTRAST_THRESHOLD);
center.ShowScrollbars = true;
fullScreen.AddViewRange(VR_CENTER_NAME, center);
if (io != null) io.AddView(BS_FULLSCREEN_NAME, fullScreen);
fullScreen.SetVisibility(false);
return fullScreen;
}
