public virtual bool HasDialog(
CaptureDlg dialog
)
Public Overridable Function HasDialog( _
ByVal dialog As CaptureDlg _
) As Boolean
public:
virtual bool HasDialog(
CaptureDlg dialog
)
dialog
Value that specifies which dialog's availability is to be checked.
true if the specified property dialog is available; otherwise it is false.
The dialog value must be one of the CaptureDlg enumeration values.
using Leadtools;
using Leadtools.Multimedia;
using LeadtoolsMultimediaExamples.Fixtures;
public bool _result = false;
public CaptureCtrlForm _form = new CaptureCtrlForm();
public void HasDialogExample()
{
// reference the capture control
CaptureCtrl capturectrl = _form.CaptureCtrl;
// output file for capture
string outFile = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_HasDialogExample.avi");
try
{
// try to find a USB camera
if (capturectrl.VideoDevices["USB"] == null)
throw new Exception("No USB video device available");
capturectrl.VideoDevices["USB"].Selected = true;
// try to find a USB audio device
if (capturectrl.AudioDevices["USB"] == null)
throw new Exception("No USB audio device available");
capturectrl.AudioDevices["USB"].Selected = true;
// The HasDialog method tells us that the control
// can display the desired settings dialog.
// check to see if the Capture properties dialog is available
if (capturectrl.HasDialog(CaptureDlg.Capture))
{
// now show it to change some settings
capturectrl.ShowDialog(CaptureDlg.Capture, _form);
_result = true;
}
// set MPEG2 as the video compressor
capturectrl.VideoCompressors.Mpeg2.Selected = true;
// set AC3 as the audio compressor
capturectrl.AudioCompressors.AC3.Selected = true;
// set the target output file and format
capturectrl.TargetFile = outFile;
// set the target output format
capturectrl.TargetFormat = TargetFormatType.AVI;
// check whether we can capture video and audio
if (capturectrl.IsModeAvailable(CaptureMode.VideoAndAudio))
{
capturectrl.FrameRate = 5; // 5 frames per second
capturectrl.UseFrameRate = true;
capturectrl.TimeLimit = 10; // just 10 seconds of capture time
capturectrl.UseTimeLimit = true;
// start the capture process
capturectrl.StartCapture(CaptureMode.VideoAndAudio);
// we'll loop on the state and pump messages for this example.
// but you should not need to if running from a Windows Forms application.
while (capturectrl.State == CaptureState.Running)
Application.DoEvents();
}
}
catch (Exception)
{
_result = false;
}
}
static class LEAD_VARS
{
public const string MediaDir = @"C:\LEADTOOLS21\Media";
}
Imports Leadtools
Imports Leadtools.Multimedia
Imports LeadtoolsMultimediaExamples.Fixtures
Public _result As Boolean = False
Public _form As CaptureCtrlForm = New CaptureCtrlForm()
Public Sub HasDialogExample()
' reference the capture control
Dim capturectrl As CaptureCtrl = _form.CaptureCtrl
' output file for capture
Dim outFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_HasDialogExample.avi")
Try
' try to find a USB camera
If capturectrl.VideoDevices("USB") Is Nothing Then
Throw New Exception("No USB video device available")
End If
capturectrl.VideoDevices("USB").Selected = True
' try to find a USB audio device
If capturectrl.AudioDevices("USB") Is Nothing Then
Throw New Exception("No USB audio device available")
End If
capturectrl.AudioDevices("USB").Selected = True
' The HasDialog method tells us that the control
' can display the desired settings dialog.
' check to see if the Capture properties dialog is available
If capturectrl.HasDialog(CaptureDlg.Capture) Then
' now show it to change some settings
capturectrl.ShowDialog(CaptureDlg.Capture, _form)
_result = True
End If
' set MPEG2 as the video compressor
capturectrl.VideoCompressors.Mpeg2.Selected = True
' set AC3 as the audio compressor
capturectrl.AudioCompressors.AC3.Selected = True
' set the target output file and format
capturectrl.TargetFile = outFile
' set the target output format
capturectrl.TargetFormat = TargetFormatType.AVI
' check if we have can capture video and audio
If capturectrl.IsModeAvailable(CaptureMode.VideoAndAudio) Then
capturectrl.FrameRate = 5 ' 5 frames per second
capturectrl.UseFrameRate = True
capturectrl.TimeLimit = 10 ' just 10 seconds of capture time
capturectrl.UseTimeLimit = True
' start the capture process
capturectrl.StartCapture(CaptureMode.VideoAndAudio)
' we'll loop on the state and pump messages for this example.
' but you should not need to if running from a Windows Forms application.
Do While capturectrl.State = CaptureState.Running
Application.DoEvents()
Loop
End If
Catch e1 As Exception
_result = False
End Try
End Sub
Public NotInheritable Class LEAD_VARS
Public Const MediaDir As String = "C:\LEADTOOLS21\Media"
End Class
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