/// <summary>
/// Detects cameras installed on the computer and if reqd,
/// asks the user to select from the list. Saves the
/// list of currently active cameras so if any change is detected
/// the next time ACAT is run, we can display the list again.
/// Also instructs ACAT Vision to use the selected camera
/// </summary>
/// <returns></returns>
private bool detectAndSetPreferredCamera()
{
var installedCameras = Cameras.GetCameraNames();
var preferredCamera = String.Empty;
bool retVal = true;
if (hasCameraListChanged() || !isCameraInstalled(VisionActuatorSettings.PreferredCamera))
{
VisionActuatorSettings.CameraList = installedCameras.ToArray();
// if there is more than one camera, let the user pick
if (installedCameras.Count() > 1)
{
var form = new CameraSelectForm
{
CameraNames = installedCameras,
Prompt = R.GetString("SelectCamera"),
OKButtonText = R.GetString("OK"),
CancelButtonText = R.GetString("Cancel"),
Name = _title
};
var result = form.ShowDialog();
if (result == DialogResult.Cancel)
{
MessageBox.Show(R.GetString("NoCameraSelectedVisionWillNotBeActivated"),
_title,
MessageBoxButtons.OK,
MessageBoxIcon.Warning);
retVal = false;
}
else
{
MessageBox.Show(String.Format(R.GetString("SelectedCamera"), form.SelectedCamera),
_title,
MessageBoxButtons.OK,
MessageBoxIcon.Information);
preferredCamera = form.SelectedCamera;
}
}
else
{
preferredCamera = installedCameras.ElementAt(0);
}
}
else
{
preferredCamera = VisionActuatorSettings.PreferredCamera;
}
VisionActuatorSettings.PreferredCamera = preferredCamera;
VisionActuatorSettings.Save();
VisionSensor.selectCamera(preferredCamera);
return(retVal);
}
/// <summary>
/// Form load event handler. Quit if there are no
/// cameras. If multiple cameras, let the user select
/// the preferred one to use
/// </summary>
/// <param name="sender">event sender</param>
/// <param name="e">event args</param>
private void Form1_Load(object sender, EventArgs e)
{
Text = _title;
var _installedCameras = Cameras.GetCameraNames();
if (!_installedCameras.Any())
{
MessageBox.Show("No cameras detected. Exiting",
_title,
MessageBoxButtons.OK,
MessageBoxIcon.Exclamation);
Close();
return;
}
var preferredCamera = String.Empty;
if (_installedCameras.Count() > 1)
{
var form = new CameraSelectForm
{
CameraNames = _installedCameras,
Name = _title,
Prompt = "Select Camera",
OKButtonText = "OK",
CancelButtonText = "Cancel"
};
var result = form.ShowDialog();
if (result == DialogResult.Cancel)
{
MessageBox.Show("No camera selected. Exiting", _title);
Close();
return;
}
preferredCamera = form.SelectedCamera;
}
else
{
preferredCamera = _installedCameras.ElementAt(0);
}
VisionSensor.selectCamera(preferredCamera);
Location = new Point(Screen.PrimaryScreen.WorkingArea.Width - Width,
Screen.PrimaryScreen.WorkingArea.Height - Height);
TopMost = false;
TopMost = true;
VisionSensor.SetVisionEventHandler(CallbackFromVision);
}
/// <summary>
/// Displays the dialog that lets the user select the
/// default camera. If the user selected one, saves
/// the name of the camera in the settings file for the
/// vision actuator
/// </summary>
/// <returns>true on success</returns>
private bool showCameraSelectDialog()
{
var preferredCamera = String.Empty;
if (!_installedCameras.Any())
{
return(false);
}
var form = new CameraSelectForm
{
CameraNames = _installedCameras,
Name = _title,
Prompt = R.GetString("SelectCamera"),
OKButtonText = R.GetString("OK"),
CancelButtonText = R.GetString("Cancel")
};
var result = form.ShowDialog();
if (result != DialogResult.Cancel)
{
MessageBox.Show(String.Format(R.GetString("SelectedCamera"), form.SelectedCamera),
_title,
MessageBoxButtons.OK,
MessageBoxIcon.Information);
preferredCamera = form.SelectedCamera;
Settings.SettingsFilePath = UserManager.GetFullPath(VisionActuator.SettingsFileName);
var settings = Settings.Load();
settings.PreferredCamera = preferredCamera;
settings.Save();
}
return(true);
}