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CanSaveObjectSettings Method

Summary

Determines whether the specified settings can be saved.

Syntax

C++

public virtual bool CanSaveObjectSettings( 
   PlaySettings flags 
)

Public Overridable Function CanSaveObjectSettings( _ 
   ByVal flags As PlaySettings _ 
) As Boolean

public: 
virtual bool CanSaveObjectSettings(  
   PlaySettings flags 
)

Parameters

flags
A combination of PlaySettings enumeration values.

Return Value

true if the specified settings can be saved; otherwise, false if one or more of the specified settings cannot be saved.

Remarks

Play object settings can be saved to a stream by calling SaveSettingsToStream. These settings can also be saved to a file by calling SaveSettingsToFile. Settings saved to a file can be loaded using LoadSettingsFromFile. Settings saved to a stream can be loaded using LoadSettingsFromStream. To make sure the settings you want to save can be saved, call CanSaveObjectSettings before calling either SaveSettingsToFile or SaveSettingsToStream. If either SaveSettingsToFile or SaveSettingsToStream is called for settings that cannot be saved, the save function will fail. Multiple settings can be combined in the Flags parameter. If multiple settings are combined in the flags parameter, all of the settings must be capable of being saved in order for this method to return true.

Example

using Leadtools; 
using Leadtools.Multimedia; 
using LeadtoolsMultimediaExamples.Fixtures; 
 
public bool _result = false; 
public PlayCtrlForm _form = new PlayCtrlForm(); 
public PlayCtrl _playctrl; 
 
public string _streamSettings = Path.Combine(LEAD_VARS.MediaDir, "PlayCtrl_ObjectSettingsExample_Stream.xml"); 
public string _fileSettings = Path.Combine(LEAD_VARS.MediaDir, "PlayCtrl_ObjectSettingsExample.xml"); 
 
public void ObjectSettingsExample() 
{ 
   // reference the play control 
   _playctrl = _form.PlayCtrl; 
 
   // input files 
   string inFile = Path.Combine(LEAD_VARS.MediaDir, "PlayCtrl_Source.avi"); 
 
   try 
   { 
      Processor pVideoDizzy = _playctrl.VideoProcessors.EFXDizzy; 
      // set a video processor 
      _playctrl.SelectedVideoProcessors.Add(pVideoDizzy); 
 
      // save the settings to a file 
      if (SaveFileSettings()) 
      { 
         // now clear the selected processors again 
         _playctrl.SelectedVideoProcessors.Clear(); 
 
         // check whether a stream file exists 
         if (File.Exists(_fileSettings)) 
         { 
            // load the saved settings from a file 
            // and check whether the processor is selected again 
            LoadFileSettings(); 
 
            // set the result  
            _result = _playctrl.SelectedVideoProcessors.Contains(pVideoDizzy); 
         } 
      } 
 
      // save the settings to a stream 
      if (SaveStreamSettings()) 
      { 
         // now clear the selected processors again 
         _playctrl.SelectedVideoProcessors.Clear(); 
 
         // check whether a stream file exists 
         if (File.Exists(_streamSettings)) 
         { 
            // load the saved settings from a stream  
            // and check whether the processor is selected again 
            LoadStreamSettings(); 
 
            // set the result  
            _result &= _playctrl.SelectedVideoProcessors.Contains(pVideoDizzy); 
         } 
      } 
   } 
   catch (Exception) 
   { 
      _result = false; 
   } 
} 
 
private void LoadFileSettings() 
{ 
   _playctrl.LoadSettingsFromFile(_fileSettings, PlaySettings.Processors); 
} 
 
private bool SaveFileSettings() 
{ 
   //  check whether we can save the processors settings 
   if (_playctrl.CanSaveObjectSettings(PlaySettings.Processors)) 
   { 
      _playctrl.SaveSettingsToFile(_fileSettings, PlaySettings.Processors); 
      return true; 
   } 
   return false; 
} 
 
private void LoadStreamSettings() 
{ 
   Stream settings = new StreamReader(_streamSettings).BaseStream; 
   _playctrl.LoadSettingsFromStream(settings, PlaySettings.Processors); 
   settings.Close(); 
} 
 
private bool SaveStreamSettings() 
{ 
   //  check whether we can save the processors settings 
   if (_playctrl.CanSaveObjectSettings(PlaySettings.Processors)) 
   { 
      Stream settings = new StreamWriter(_streamSettings, false).BaseStream; 
      _playctrl.SaveSettingsToStream(settings, PlaySettings.Processors); 
      settings.Close(); 
      return true; 
   } 
   return false; 
} 
 
static class LEAD_VARS 
{ 
   public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 20\Media"; 
}

Imports Leadtools 
Imports Leadtools.Multimedia 
Imports LeadtoolsMultimediaExamples.Fixtures 
 
Public _result As Boolean = False 
Public _form As PlayCtrlForm = New PlayCtrlForm() 
Public _playctrl As PlayCtrl 
 
Public _streamSettings As String = Path.Combine(LEAD_VARS.MediaDir, "PlayCtrl_ObjectSettingsExample_Stream.xml") 
Public _fileSettings As String = Path.Combine(LEAD_VARS.MediaDir, "PlayCtrl_ObjectSettingsExample.xml") 
 
Public Sub ObjectSettingsExample() 
   ' reference the play control 
   _playctrl = _form.PlayCtrl 
 
   ' input files 
   Dim inFile As String = Path.Combine(LEAD_VARS.MediaDir, "PlayCtrl_Source.avi") 
 
   Try 
      Dim pVideoDizzy As Processor = _playctrl.VideoProcessors.EFXDizzy 
      ' set a video processor 
      _playctrl.SelectedVideoProcessors.Add(pVideoDizzy) 
 
      ' save the settings to a file 
      If SaveFileSettings() Then 
         ' now clear the selected processors again 
         _playctrl.SelectedVideoProcessors.Clear() 
 
         ' check if stream file exists 
         If File.Exists(_fileSettings) Then 
            ' load the saved settings from a file 
            ' and check if the processor is selected again 
            LoadFileSettings() 
 
            ' set the result  
            _result = _playctrl.SelectedVideoProcessors.Contains(pVideoDizzy) 
         End If 
      End If 
 
      ' save the settings to a stream 
      If SaveStreamSettings() Then 
         ' now clear the selected processors again 
         _playctrl.SelectedVideoProcessors.Clear() 
 
         ' check if stream file exists 
         If File.Exists(_streamSettings) Then 
            ' load the saved settings from a stream  
            ' and check if the processor is selected again 
            LoadStreamSettings() 
 
            ' set the result  
            _result = _result And _playctrl.SelectedVideoProcessors.Contains(pVideoDizzy) 
         End If 
      End If 
   Catch e1 As Exception 
      _result = False 
   End Try 
End Sub 
 
Private Sub LoadFileSettings() 
   _playctrl.LoadSettingsFromFile(_fileSettings, PlaySettings.Processors) 
End Sub 
 
Private Function SaveFileSettings() As Boolean 
   '  check if we can save the processors settings 
   If _playctrl.CanSaveObjectSettings(PlaySettings.Processors) Then 
      _playctrl.SaveSettingsToFile(_fileSettings, PlaySettings.Processors) 
      Return True 
   End If 
   Return False 
End Function 
 
Private Sub LoadStreamSettings() 
   Dim settings As Stream = New StreamReader(_streamSettings).BaseStream 
   _playctrl.LoadSettingsFromStream(settings, PlaySettings.Processors) 
   settings.Close() 
End Sub 
 
Private Function SaveStreamSettings() As Boolean 
   '  check if we can save the processors settings 
   If _playctrl.CanSaveObjectSettings(PlaySettings.Processors) Then 
      Dim settings As Stream = New StreamWriter(_streamSettings, False).BaseStream 
      _playctrl.SaveSettingsToStream(settings, PlaySettings.Processors) 
      settings.Close() 
      Return True 
   End If 
   Return False 
End Function 
 
Public NotInheritable Class LEAD_VARS 
   Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 20\Media" 
End Class

Requirements

Target Platforms

Reference

PlayCtrl Class

PlayCtrl Members

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Help Version 20.0.2020.4.2

Leadtools.Multimedia Assembly

Introduction

Getting Started

Namespaces

Leadtools.Multimedia Namespace

Leadtools.Multimedia.Common Namespace

Assemblies