Develop Reference

How do I get keyboard events in the topmost NSPanel?

I have created an app using Xamarin to help watching movies online. It shows the subtitles on top of all other windows. This has been done using the NSPanel, as it was the only way to make it work on MacOS Mojave.
The app works well. Now I want to improve the app by making NSPanel respond to the keyboard events, so I can control the app by using the keyboard for pausing, playing, going backward or going forward.
How do I get keyboard events in the topmost NSPanel?
I tried to use this code:
NSEvent.AddLocalMonitorForEventsMatchingMask(NSEventMask.KeyDown, KeyboardEventHandler);
private static NSEvent KeyboardEventHandler(NSEvent keyEvent)
{
// handle key down events here
return (keyEvent);
}
But it only works when the app is not in the full-screen mode.
The full SubtitlesViewer-MACOS project can be found here.
Here is the part of the code that creates the panel:
public override void ViewWillAppear()
{
base.ViewWillAppear();
SetupView();
}
private void SetupView()
{
var screenRes = screenResolution();
int PANEL_HEIGHT = 200;
subtitlesPanel = new NSPanel
(
new CoreGraphics.CGRect(40, 50, screenRes.Width - 80, PANEL_HEIGHT),
NSWindowStyle.Titled | NSWindowStyle.Closable | NSWindowStyle.Resizable | NSWindowStyle.Miniaturizable | NSWindowStyle.DocModal,
NSBackingStore.Buffered, true
)
{
BackgroundColor = NSColor.FromCalibratedRgba(0, 0, 0, 0.0f),
ReleasedWhenClosed = true,
HidesOnDeactivate = false,
FloatingPanel = true,
StyleMask = NSWindowStyle.NonactivatingPanel,
Level = NSWindowLevel.MainMenu - 1,
IsMovable = true,
CollectionBehavior = NSWindowCollectionBehavior.CanJoinAllSpaces |
NSWindowCollectionBehavior.FullScreenAuxiliary
};
subtitlesPanel.OrderFront(null);
subtitleTextButton = new NSButton(new CoreGraphics.CGRect(40, 0, screenRes.Width - 120, PANEL_HEIGHT-30))
{
Title = "",
WantsLayer = true
};
subtitleTextButton.Layer.BackgroundColor = NSColor.Clear.CGColor;
subtitleTextField = new NSTextField(new CoreGraphics.CGRect(40, 0, screenRes.Width - 120, PANEL_HEIGHT-30))
{
Alignment = NSTextAlignment.Center
};
subtitleTextField.Cell.Alignment = NSTextAlignment.Center;
forwardButton = new NSButton(new CoreGraphics.CGRect(0, 0, 40, 30));
forwardButton.Title = ">>";
forwardButton.Activated += (object sender, EventArgs e) => {
subtitlesProvider.Forward();
};
backButton = new NSButton(new CoreGraphics.CGRect(0, 30, 40, 30));
backButton.Title = "<<";
backButton.Activated += (object sender, EventArgs e) => {
subtitlesProvider.Back();
};
startStopButton = new NSButton(new CoreGraphics.CGRect(0, 60, 40, 30));
startStopButton.Title = "Play";
startStopButton.Activated += (object sender, EventArgs e) => {
subtitlesProvider.StartStop(subtitlesProvider.Playing);
};
subtitlesPanel.ContentView.AddSubview(subtitleTextButton, NSWindowOrderingMode.Below, null);
subtitlesPanel.ContentView.AddSubview(subtitleTextField, NSWindowOrderingMode.Below, null);
subtitlesPanel.ContentView.AddSubview(forwardButton, NSWindowOrderingMode.Below, null);
subtitlesPanel.ContentView.AddSubview(backButton, NSWindowOrderingMode.Below, null);
subtitlesPanel.ContentView.AddSubview(startStopButton, NSWindowOrderingMode.Below, null);
SetupSubtitlesProvider();
}
Please kindly advice what else should I try to make it work.

I have found the solution here:
keyDown not being called
This is my implementation of NSPanelExt class to handle the keys.
public class NSPanelExt : NSPanel
{
public KeyPressedHandler KeyPressed;
public delegate void KeyPressedHandler(KeyCodeEventArgs e);
public NSPanelExt(CGRect contentRect, NSWindowStyle aStyle, NSBackingStore bufferingType, bool deferCreation) : base(contentRect, aStyle, bufferingType, deferCreation)
{
}
public override bool CanBecomeMainWindow => true;
public override bool CanBecomeKeyWindow => true;
public override bool AcceptsFirstResponder()
{
return true;
}
public override void KeyDown(NSEvent theEvent)
{
// this function is never called
KeyPressed?.Invoke(new KeyCodeEventArgs { Key = GetKeyCode(theEvent.KeyCode) });
}
private KeyCode GetKeyCode(ushort keyCode)
{
KeyCode result = KeyCode.Unknown;
switch (keyCode)
{
case 123:
result = KeyCode.Left;
break;
case 49:
result = KeyCode.Space;
break;
case 124:
result = KeyCode.Right;
break;
case 53:
result = KeyCode.Esc;
break;
}
return result;
}
I have also updated the ViewController to keep NSPanel always active.
public partial class ViewController : NSViewController
{
// ...
private NSButton startStopButton;
Timer _timer = new Timer();
private void SetupView()
{
// ...
subtitlesPanel.KeyPressed += SubtitlesPanel_KeyPressed;
// ...
IntializeKeepWindowFocusedTimer();
}
void SubtitlesPanel_KeyPressed(KeyCodeEventArgs e)
{
switch(e.Key)
{
case KeyCode.Left:
backButton.PerformClick(this);
break;
case KeyCode.Right:
forwardButton.PerformClick(this);
break;
case KeyCode.Space:
startStopButton.PerformClick(this);
break;
case KeyCode.Esc:
_timer.Stop();
break;
}
}
private void IntializeKeepWindowFocusedTimer()
{
_timer.Interval = 200; //in milliseconds
_timer.Elapsed += Timer_Elapsed;;
_timer.AutoReset = true;
_timer.Enabled = true;
}
void Timer_Elapsed(object sender, ElapsedEventArgs e)
{
NSApplication.SharedApplication.BeginInvokeOnMainThread(() =>
{
subtitlesPanel.MakeKeyWindow();
if (SetSubtitleNeeded)
{
subtitlesProvider.SetSubTitle(0);
startStopButton.Title = "Stop";
SetSubtitleNeeded = false;
_timer.Interval = 5000;
}
});
}
private bool SetSubtitleNeeded = false;
partial void ClickedButton(NSObject sender)
{
_timer.Stop();
var nsUrl = subtitleFileSelector.GetFile();
if (nsUrl == null)
return;
fileName = nsUrl.Path;
subtitlesProvider.ReadFromFile(fileName);
SetSubtitleNeeded = true;
_timer.Start();
}

CS1061 error Xamarin/Visual Studio

I am trying to run some source code that I downloaded from here
This is essentially an app that will allow users to manage contacts and calendar appointments etc.
I am currently experiencing 3 errors, all seemingly related...
CS1061 - UIImageView does not contain a definition for 'SetImage' and no extension method 'SetImage' accepting a first argument of type 'UIImageView' could be found (are you missing a using directive or an assembly reference?)
It seems that SetImage is not defined somewhere?
Would someone be able to tell me what i need to do to resolve the error. I post my code below...
using System;
using Foundation;
using UIKit;
using System.CodeDom.Compiler;
using MessageUI;
using Microsoft.Office365.OutlookServices;
using FiveMinuteMeeting.Shared.ViewModels;
using CoreGraphics;
using FiveMinuteMeeting.Shared;
namespace FiveMinuteMeeting.iOS
{
partial class ContactDetailViewController : UIViewController
{
public ContactDetailViewController(IntPtr handle)
: base(handle)
{
}
public DetailsViewModel ViewModel
{
get;
set;
}
UIBarButtonItem save;
public override void ViewDidLoad()
{
base.ViewDidLoad();
NavigationController.NavigationBar.BarStyle = UIBarStyle.Black;
save = new UIBarButtonItem(UIBarButtonSystemItem.Save,
async (sender, args) =>
{
ViewModel.FirstName = TextFirst.Text.Trim();
ViewModel.LastName = TextLast.Text.Trim();
ViewModel.Email = TextEmail.Text.Trim();
ViewModel.Phone = TextPhone.Text.Trim();
//BigTed.BTProgressHUD.Show("Saving contact...");
await ViewModel.SaveContact();
//BigTed.BTProgressHUD.Dismiss();
NavigationController.PopToRootViewController(true);
});
TextEmail.ShouldReturn += ShouldReturn;
TextFirst.ShouldReturn += ShouldReturn;
TextPhone.ShouldReturn += ShouldReturn;
TextLast.ShouldReturn += ShouldReturn;
TextEmail.ValueChanged += (sender, args) =>
{
ImagePhoto.SetImage(
url: new NSUrl(Gravatar.GetURL(TextEmail.Text, 172)),
placeholder: UIImage.FromBundle("missing.png")
);
};
var color = new CGColor(17.0F / 255.0F, 113.0F / 255.0F, 197.0F / 255F);
TextEmail.Layer.BorderColor = color;
TextFirst.Layer.BorderColor = color;
TextPhone.Layer.BorderColor = color;
TextLast.Layer.BorderColor = color;
ButtonCall.Clicked += (sender, args) => PlaceCall();
NSNotificationCenter.DefaultCenter.AddObserver
(UIKeyboard.DidShowNotification, KeyBoardUpNotification);
// Keyboard Down
NSNotificationCenter.DefaultCenter.AddObserver
(UIKeyboard.WillHideNotification, KeyBoardDownNotification);
double min = Math.Min((float)ImagePhoto.Frame.Width, (float)ImagePhoto.Frame.Height);
ImagePhoto.Layer.CornerRadius = (float)(min / 2.0);
ImagePhoto.Layer.MasksToBounds = false;
ImagePhoto.Layer.BorderColor = new CGColor(1, 1, 1);
ImagePhoto.Layer.BorderWidth = 3;
ImagePhoto.ClipsToBounds = true;
}
public override void ViewWillAppear(bool animated)
{
base.ViewWillAppear(animated);
if (ViewModel == null)
{
ViewModel = new DetailsViewModel();
NavigationItem.RightBarButtonItem = save;
}
else
{
this.Title = ViewModel.FirstName;
TextEmail.Text = ViewModel.Email;
TextFirst.Text = ViewModel.FirstName;
TextLast.Text = ViewModel.LastName;
TextPhone.Text = ViewModel.Phone;
ImagePhoto.SetImage(
url: new NSUrl(Gravatar.GetURL(ViewModel.Contact.EmailAddresses[0].Address, 172)),
placeholder: UIImage.FromBundle("missing.png")
);
NavigationItem.RightBarButtonItem = null;
}
}
private bool ShouldReturn(UITextField field)
{
field.ResignFirstResponder();
return true;
}
private void PlaceCall()
{
var alertPrompt = new UIAlertView("Dial Number?",
"Do you want to call " + TextPhone.Text + "?",
null, "No", "Yes");
alertPrompt.Dismissed += (sender, e) =>
{
if ((int)e.ButtonIndex >= (int)alertPrompt.FirstOtherButtonIndex)
{
var url = new NSUrl("tel:" + TextPhone.Text);
if (!UIApplication.SharedApplication.OpenUrl(url))
{
var av = new UIAlertView("Not supported",
"Scheme 'tel:' is not supported on this device",
null,
"OK",
null);
av.Show();
}
else
{
UIApplication.SharedApplication.OpenUrl(url);
}
}
};
alertPrompt.Show();
}
/*private async void SendEmail()
{
var mailController = new MFMailComposeViewController();
mailController.SetToRecipients(new string[] { TextEmail.Text });
mailController.SetSubject("5 Minute Meeting");
mailController.SetMessageBody("We are having a 5 minute stand up tomorrow at this time! Check your calendar.", false);
mailController.Finished += (object s, MFComposeResultEventArgs args) =>
{
Console.WriteLine(args.Result.ToString());
args.Controller.DismissViewController(true, (Action)null);
};
PresentViewControllerAsync(mailController, true);
}*/
public override void PrepareForSegue(UIStoryboardSegue segue, NSObject sender)
{
switch(segue.Identifier)
{
case "email":
{
var vc = segue.DestinationViewController as SendEmailViewController;
vc.ViewModel.FirstName = ViewModel.FirstName;
vc.ViewModel.LastName = ViewModel.LastName;
vc.ViewModel.Email = ViewModel.Email;
}
break;
case "meeting":
{
var vc = segue.DestinationViewController as NewEventDurationViewController;
vc.ViewModel.FirstName = ViewModel.FirstName;
vc.ViewModel.LastName = ViewModel.LastName;
vc.ViewModel.Email = ViewModel.Email;
}
break;
}
}
#region Keyboard
private UIView activeview; // Controller that activated the keyboard
private float scrollamount; // amount to scroll
private float bottom; // bottom point
private const float Offset = 68.0f; // extra offset
private bool moveViewUp; // which direction are we moving
private void KeyBoardDownNotification(NSNotification notification)
{
if (moveViewUp) { ScrollTheView(false); }
}
private void ScrollTheView(bool move)
{
// scroll the view up or down
UIView.BeginAnimations(string.Empty, System.IntPtr.Zero);
UIView.SetAnimationDuration(0.3);
CGRect frame = (CGRect)View.Frame;
if (move)
{
frame.Y -= scrollamount;
}
else
{
frame.Y += scrollamount;
scrollamount = 0;
}
View.Frame = frame;
UIView.CommitAnimations();
}
private void KeyBoardUpNotification(NSNotification notification)
{
// get the keyboard size
var r = (CGRect)UIKeyboard.FrameBeginFromNotification((NSNotification)notification);
// Find what opened the keyboard
foreach (UIView view in this.View.Subviews)
{
if (view.IsFirstResponder)
activeview = view;
}
// Bottom of the controller = initial position + height + offset
bottom = ((float)activeview.Frame.Y + (float)activeview.Frame.Height + Offset);
// Calculate how far we need to scroll
scrollamount = ((float)r.Height - ((float)View.Frame.Size.Height - bottom));
// Perform the scrolling
if (scrollamount > 0)
{
moveViewUp = true;
ScrollTheView(moveViewUp);
}
else
{
moveViewUp = false;
}
}
#endregion
}
}
I am very new to Xamarin & app development and I just wanted to run this because it is a very similar project to one that I am creating.
Thanks for your help

SetImage is a extension method contained in Xamarin.SDWebImage. Ensure, that you have restored all nuget packages or have installed it via
Install-Package Xamarin.SDWebImage
see: https://www.nuget.org/packages/Xamarin.SDWebImage/

Here a explanation of the error.
https://msdn.microsoft.com/en-us/library/bb383961.aspx
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
CS1061 - UIImageView does not contain a definition for 'SetImage' and no extension method 'SetImage' accepting a first argument of type 'UIImageView' could be found (are you missing a using directive or an assembly reference?)
In your code I don't watch a declaration of ImagePhoto check right click goto definition. And verify that for imagePhoto exist a method setImage ImagePhoto I'm asumming that is object of type UIImage
ImagePhoto.SetImage(
url: new NSUrl(Gravatar.GetURL(TextEmail.Text, 172)),
placeholder: UIImage.FromBundle("missing.png")
);

Xamarin IOS Can't get GeoFencing to work

I have the following test code running on my phone. It shows a circle on the map where my GeoFence is. If I walk outside of the fence, then back in then backout the events are never firing. I have no idea what Im missing:
using MonoTouch;
using CoreLocation;
using MapKit;
using System.Drawing;
using CoreGraphics;
namespace GeoFencingTest
{
public class GeoFencingController : UIViewController
{
UIWindow Parent;
CustomMapView mapView;
CLLocationManager locMgr = new CLLocationManager ();
UITextView textview;
UIButton button;
CLCircularRegion region;
CLLocationCoordinate2D FenceCenter;
public GeoFencingController (UIWindow parent)
{
var radius = 25;
FenceCenter = new CLLocationCoordinate2D (33.8399522334765, -84.3729872355209);
Parent = parent;
View = new UIView (new RectangleF ((float)Parent.Bounds.Left, (float)Parent.Bounds.Top, (float)Parent.Bounds.Width, (float)Parent.Bounds.Height));
parent.AddSubview (View);
locMgr.RequestWhenInUseAuthorization ();
locMgr.DesiredAccuracy = 5;
locMgr.StartUpdatingLocation ();
region = new CLCircularRegion (FenceCenter, radius, "TPM");
locMgr.StartMonitoring (region);
mapView = new CustomMapView ();
mapView.Frame = new RectangleF ((float)Parent.Bounds.Left + 20, (float)55, (float)Parent.Bounds.Width - 40, (float)Parent.Bounds.Height - 80);
mapView.ShowsUserLocation = true;
mapView.UserInteractionEnabled = true;
mapView.MapType = MKMapType.Hybrid;
mapView.ZoomEnabled = true;
mapView.ScrollEnabled = true;
mapView.UserTrackingMode = MKUserTrackingMode.Follow;
mapView.Delegate = new MapDelegate ();
mapView.CenterCoordinate = FenceCenter;
View.AddSubview (mapView);
var circleOverlay = MKCircle.Circle (new CLLocationCoordinate2D (FenceCenter.Latitude, FenceCenter.Longitude), radius);
mapView.AddOverlay (circleOverlay);
textview = new UITextView (new RectangleF (0, 20, 190, 50));
View.AddSubview (textview);
if (CLLocationManager.IsMonitoringAvailable (typeof(CLCircularRegion))) {
locMgr.DidStartMonitoringForRegion += (o, e) => {
textview.Text = "Now monitoring region " + e.Region.ToString ();
};
locMgr.RegionEntered += (o, e) => {
textview.Text = "Just entered " + e.Region.ToString ();
};
locMgr.RegionLeft += (o, e) => {
textview.Text = "Just left " + e.Region.ToString ();
};
} else {
textview.Text = "This app requires region monitoring, which is unavailable on this device";
}
}
public class MapDelegate : MKMapViewDelegate
{
public override MKOverlayView GetViewForOverlay (MKMapView mapView, NSObject overlay)
{
// return a view for the polygon
MKCircle circle = overlay as MKCircle;
MKCircleView circleView = new MKCircleView (circle);
circleView.FillColor = UIColor.Yellow;
circleView.Alpha = 0.5f;
circleView.LineWidth = 10;
circleView.StrokeColor = UIColor.Red;
return circleView;
}
}
public class CustomMapView : MKMapView
{
public override void TouchesBegan (NSSet touches, UIEvent evt)
{
base.TouchesBegan (touches, evt);
UITouch touch = touches.AnyObject as UITouch;
CGPoint pointInView = touch.LocationInView (this);
CLLocationCoordinate2D touchCoordinates = base.ConvertPoint (pointInView, this);
MKMapPoint mapPoint = MKMapPoint.FromCoordinate (touchCoordinates);
Console.WriteLine ("LAT: " + touchCoordinates.Latitude);
Console.WriteLine ("LON: " + touchCoordinates.Longitude);
}
}
}
}

You may want to try setting up your event handlers before calling StartMonitoring instead of after.

Automatic Picture Slider C#

I would like that when the form loads and/or starts my picture slide will start automatically.I tried to put the path of where the folder is located but it keeps giving an error. When I use it a dialog box it works. I am trying to bypass the dialog box so it starts automatically.
public partial class Form1 : Form
{
private string[] folderFile = null;
private int selected = 0;
private int end = 0;
FolderBrowserDialog folderBrowserDialog1 = new FolderBrowserDialog();
// The folder is pre created
string path1 = Environment.GetFolderPath(Environment.SpecialFolder.Personal) + "\\Pictures";
public Form1()
{
InitializeComponent();
//This does not work when the form starts up.
if (!Directory.Exists(path1))
{
string[] part1 = null, part2 = null, part3 = null;
part1 = Directory.GetFiles(path1, "*.jpg");
part2 = Directory.GetFiles(path1, "*.jpeg");
part3 = Directory.GetFiles(path1, "*.bmp");
folderFile = new string[part1.Length + part2.Length + part3.Length];
Array.Copy(part1, 0, folderFile, 0, part1.Length);
Array.Copy(part2, 0, folderFile, part1.Length, part2.Length);
Array.Copy(part3, 0, folderFile, part1.Length + part2.Length, part3.Length);
selected = 0;
//begin = 0;
end = folderFile.Length;
showImage(folderFile[selected]);
// 5 to 10 second intervals
//timer1.Enabled = true;
}
else
{
}
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void timer1_Tick(object sender, EventArgs e)
{
nextImage();
}
private void btnFolder_Click(object sender, EventArgs e)
{
//Original
//This works!!
//while (folderBrowserDialog1.ShowDialog() == DialogResult.OK)
//{
// string[] part1 = null, part2 = null, part3 = null;
// part1 = Directory.GetFiles(folderBrowserDialog1.SelectedPath, "*.jpg");
// part2 = Directory.GetFiles(folderBrowserDialog1.SelectedPath, "*.jpeg");
// part3 = Directory.GetFiles(folderBrowserDialog1.SelectedPath, "*.bmp");
// folderFile = new string[part1.Length + part2.Length + part3.Length];
// Array.Copy(part1, 0, folderFile, 0, part1.Length);
// Array.Copy(part2, 0, folderFile, part1.Length, part2.Length);
// Array.Copy(part3, 0, folderFile, part1.Length + part2.Length, part3.Length);
// selected = 0;
// //begin = 0;
// end = folderFile.Length;
// showImage(folderFile[selected]);
// //btnPrev.Enabled = true;
// //btnNext.Enabled = true;
// //btnStartSlide.Enabled = true;
//}
}
private void showImage(string path)
{
Image imgtemp = Image.FromFile(path);
//pictureBox1.Width = imgtemp.Width / 2;
//pictureBox1.Height = imgtemp.Height / 2;
//pictureBox1.Image = imgtemp;
panel1.BackgroundImage = imgtemp;
}
private void prevImage()
{
if (selected == 0)
{
selected = folderFile.Length - 1;
showImage(folderFile[selected]);
}
else
{
selected = selected - 1;
showImage(folderFile[selected]);
}
}
private void nextImage()
{
if (selected == folderFile.Length - 1)
{
selected = 0;
showImage(folderFile[selected]);
}
else
{
selected = selected + 1;
showImage(folderFile[selected]);
}
}
private void btnPreviews_Click(object sender, EventArgs e)
{
prevImage();
}
private void btnNext_Click(object sender, EventArgs e)
{
nextImage();
}
private void btnStart_Click(object sender, EventArgs e)
{
if (timer1.Enabled == true)
{
timer1.Enabled = false;
btnStart.Text = "<< START >>";
}
else
{
timer1.Enabled = true;
btnStart.Text = "<< STOP >>";
}
}
}
}

Try
string path1 = Environment.GetFolderPath(Environment.SpecialFolder.MyPictures) + "\\Sample_Pictures";
or
string path1 = Environment.GetFolderPath(Environment.SpecialFolder.CommonPictures) + "\\Sample_Pictures";
Or use
string publicDesktopPath = Environment.GetFolderPath(Environment.SpecialFolder.CommonDesktopDirectory);
var directory = new DirectoryInfo(publicDesktopPath);
string path1 = directory.Parent.FullName + "\\Pictures\\Sample_Pictures";
and fix your conditional
if (!Directory.Exists(path1)) {
to
if (Directory.Exists(path1)) {
so that you don't try operations on an non-existent directory.
To get it to cycle through your pictures, you could use a System.Timers.Timer:
In your Form1 class
private static Timer timer;
Declare the timer in your constructor:
timer = new System.Timers.Timer(5000); // change interval in milliseconds
timer.Elapsed += OnTimedEvent;
timer.Enabled = true;
Create the OnTimedEvent method in your Form1 class:
private static void OnTimedEvent(Object source, ElapsedEventArgs e)
{
// Do what you want every time the timer elapses that interval
nextImage();
}

Selecting a default combobox value

When my program loads, my combobox has no default value. I want the first one to be the default value when the program is loaded. How can I do that?
using Gtk;
using System;
class SharpApp : Window
{
Label label;
Label label2;
Label label3;
Label label4;
public SharpApp() : base(" VALUTASOFFAN")
{
SetDefaultSize(411, 199);
SetPosition(WindowPosition.Center);
SetIconFromFile("..\\..\\web.png");
DeleteEvent += new DeleteEventHandler(OnDelete);
string[] valutor = new string[]
{
"YEN",
"SEK",
"EURO"
};
//BOX1
Fixed fix = new Fixed();
ComboBox cb = new ComboBox(valutor);
ComboBox cb2 = new ComboBox(valutor);
Entry entry = new Entry ();
Entry entry2 = new Entry ();
cb.Changed += OnChanged;
cb2.Changed += OnChanged2;
entry.Changed += onChanged3;
entry2.Changed += onChanged4;
ComboBox combo = ComboBox.NewText();
combo.Active = 0
cb.Active = 0;
label = new Label("-");
label2 = new Label("-");
label3 = new Label("-");
label4 = new Label("-");
fix.Put(entry, 100, 30);
fix.Put(entry2, 100, 100);
fix.Put(cb, 300, 30);
fix.Put(cb2, 300, 100);
//fix.Put(label3, 10, 30);
//fix.Put(label4, 10, 100);
Add(fix);
ShowAll();
}
void OnChanged(object sender, EventArgs args)
{
ComboBox cb = (ComboBox) sender;
label.Text = cb.ActiveText;
}
void OnChanged2(object sender2, EventArgs args)
{
ComboBox cb2 = (ComboBox) sender2;
label2.Text = cb2.ActiveText;
}
void onChanged3(object sender3, EventArgs args)
{
Entry entry = (Entry)sender3;
label3.Text = entry.Text;
}
void onChanged4(object sender4, EventArgs args)
{
Entry entry2 = (Entry)sender4;
label4.Text = entry2.Text;
}
public static void Main()
{
Application.Init();
new SharpApp();
Application.Run();
}
void OnDelete(object obj, DeleteEventArgs args)
{
Application.Quit();
}
}

I want the first one to be the default value when the program is
loaded. How can I do that?
Base of index of the given items
yourComboBox.SelectedIndex = 0;
Base of .ValueMember of the ComboBox
yourComboBox.SelectedValue = 1;