Imports Leadtools
Imports Leadtools.MediaFoundation
Imports LeadtoolsMediaFoundationExamples.Fixtures
Public _result As Boolean = False
Public _form As New CaptureCtrlForm()
Public _capturectrl As CaptureCtrl
Public _csbform As TestCtrlSubForm
Public Sub DevicesExample()
' reference the capture control
_capturectrl = _form.CaptureCtrl
' input file
Dim outFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_Source.avi")
Try
' create the sub form for devices listbox
_csbform = New TestCtrlSubForm()
AddHandler _csbform.Load, AddressOf Form_Load
AddHandler _csbform.buttonRefresh.Click, AddressOf Refresh_Click
AddHandler _csbform.List.Click, AddressOf List_Click
' show the devices form
_csbform.ShowDialog()
' get the selected device index
Dim selectedRenderer As Integer = _capturectrl.AudioDevices.Selection
' set the result to what we expect
_result = (_csbform.List.SelectedItem IsNot Nothing AndAlso _capturectrl.AudioDevices.Selection <> -1)
Catch generatedExceptionName As Exception
_result = False
End Try
End Sub
Private Sub Form_Load(ByVal sender As Object, ByVal e As EventArgs)
' build the audio device list
EnumerateDevices(_capturectrl.AudioDevices, _csbform.List)
End Sub
Private Sub List_Click(ByVal sender As Object, ByVal e As EventArgs)
' select the audio device
SelectRenderer(_capturectrl.AudioDevices, _csbform.List)
End Sub
Private Sub Refresh_Click(ByVal sender As Object, ByVal e As EventArgs)
' refresh audio devices
RefreshDevices(_capturectrl.AudioDevices, _csbform.List)
End Sub
Private Sub EnumerateDevices(ByVal Devices As AudioDevices, ByVal List As ListBox)
' Build the devices list box
Dim Selected As Integer = -1
' empty the list box
List.Items.Clear()
' add the available audio devices to the list box
Dim i As Integer = 0
While (i <= (Devices.Count - 1))
List.Items.Add(Devices(i))
If Devices(i).Selected Then
Selected = i
End If
i += 1
End While
' highlight the current selection
List.SelectedIndex = Selected
End Sub
Private Sub RefreshDevices(ByVal Devices As AudioDevices, ByVal List As ListBox)
Dim SelectedName As String = String.Empty
' save the currently selected device's name
If Devices.Selection >= 0 Then
SelectedName = Devices(Devices.Selection).FriendlyName
End If
' refresh the device collection
Devices.Refresh()
' if there was a previously selected renderer, reselect it
If SelectedName <> String.Empty Then
Devices.Selection = Devices.IndexOf(SelectedName)
End If
' rebuild the listbox
EnumerateDevices(Devices, List)
End Sub
Private Sub SelectRenderer(ByVal Devices As AudioDevices, ByVal List As ListBox)
' select the highlighted device
Devices.Selection = Devices.IndexOf(TryCast(List.Items(List.SelectedIndex), Device))
End Sub
Public NotInheritable Class LEAD_VARS
Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 19\Media"
End Class
using Leadtools;
using Leadtools.MediaFoundation;
using LeadtoolsMediaFoundationExamples.Fixtures;
public bool _result = false;
public CaptureCtrlForm _form = new CaptureCtrlForm();
public CaptureCtrl _capturectrl;
public TestCtrlSubForm _csbform;
public void DevicesExample()
{
// reference the capture control
_capturectrl = _form.CaptureCtrl;
// input file
string outFile =Path.Combine(LEAD_VARS.MediaDir,"CaptureCtrl_Source.avi");
try
{
// create the sub form for devices listbox
_csbform = new TestCtrlSubForm();
_csbform.Load += new EventHandler(Form_Load);
_csbform.buttonRefresh.Click += new EventHandler(Refresh_Click);
_csbform.List.Click += new EventHandler(List_Click);
// show the devices form
_csbform.ShowDialog();
// get the selected device index
int selectedRenderer = _capturectrl.AudioDevices.Selection;
// set the result to what we expect
_result = (_csbform.List.SelectedItem != null && _capturectrl.AudioDevices.Selection != -1);
}
catch (Exception)
{
_result = false;
}
}
void Form_Load(object sender, EventArgs e)
{
// build the audio device list
EnumerateDevices(_capturectrl.AudioDevices, _csbform.List);
}
void List_Click(object sender, EventArgs e)
{
// select the audio device
SelectRenderer(_capturectrl.AudioDevices, _csbform.List);
}
void Refresh_Click(object sender, EventArgs e)
{
// refresh audio devices
RefreshDevices(_capturectrl.AudioDevices, _csbform.List);
}
void EnumerateDevices(AudioDevices Devices, ListBox List)
{
// Build the devices list box
int Selected = -1;
// empty the list box
List.Items.Clear();
// add the available audio devices to the list box
for (int i = 0; (i <= (Devices.Count - 1)); i++)
{
List.Items.Add(Devices[i]);
if (Devices[i].Selected)
{
Selected = i;
}
}
// highlight the current selection
List.SelectedIndex = Selected;
}
void RefreshDevices(AudioDevices Devices, ListBox List)
{
string SelectedName = string.Empty;
// save the currently selected device's name
if (Devices.Selection >= 0)
SelectedName = Devices[Devices.Selection].FriendlyName;
// refresh the device collection
Devices.Refresh();
// if there was a previously selected renderer, reselect it
if (SelectedName != string.Empty)
Devices.Selection = Devices.IndexOf(SelectedName);
// rebuild the listbox
EnumerateDevices(Devices, List);
}
void SelectRenderer(AudioDevices Devices, ListBox List)
{
// select the highlighted device
Devices.Selection = Devices.IndexOf(List.Items[List.SelectedIndex] as Device);
}
static class LEAD_VARS
{
public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 19\Media";
}
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