Develop Reference

How can I find if a selection is inside the rubberband selection in a ListView?

I am using the events ItemSelectionChanged and SelectedIndexChanged of the ListView class to answer this question.
The code is below, and the only bug that seems to remain is that I use the 250ms timer also when the user uses rubberband selection, not only for single or double click selection.
internal Form1()
{
InitializeComponent();
t.Tick += T_Tick;
}
internal bool santinela = false;
internal void T_Tick(object sender, EventArgs e)
{
t.Stop();
if (!santinela)
{
bool newVal = selectionChangedItem.Selected;
selectionChangedItem.Checked =
selectionChangedItem.Selected = newVal;
santinela = true;
}
}
internal Timer t = new Timer()
{
Interval = 250
};
internal bool santinela3 = true;
internal void listView1_ItemCheck(object sender, ItemCheckEventArgs e)
{
if (santinela3)
{
if (e.CurrentValue == CheckState.Checked)
{
listView1.SelectedIndices.Remove(e.Index);
}
else if (e.CurrentValue == CheckState.Unchecked)
{
listView1.SelectedIndices.Add(e.Index);
}
}
}
internal void listView1_ItemActivate(object sender, EventArgs e)
{
if (listView1.SelectedItems.Count > 0)
{
MessageBox.Show(listView1.SelectedItems[0].Text);
}
}
internal ListViewItem selectionChangedItem = null;
internal bool santinela2 = true;
internal void listView1_ItemSelectionChanged(object sender, ListViewItemSelectionChangedEventArgs e)
{
if (!santinela2)
{
return;
}
if (t.Enabled)
{
santinela = true;
t.Stop();
// double click: both clicks must be done in the same place
if (e.Item == selectionChangedItem)
{
if (!e.IsSelected)
{
santinela2 = true;
e.Item.Selected = true;
santinela2 = false;
}
listView1_ItemActivate(sender, EventArgs.Empty);
}
selectionChangedItem = null;
}
else
{
santinela = false;
t.Stop();
selectionChangedItem = e.Item;
t.Start();
}
}
internal void listView1_SelectedIndexChanged(object sender, EventArgs e)
{
if (listView1.SelectedIndices.Count == 0)
{
santinela = true;
t.Stop();
selectionChangedItem = null;
santinela3 = false;
for (int i = 0; i < listView1.CheckedItems.Count; ++i)
{
listView1.CheckedItems[i].Checked = false;
}
santinela3 = true;
}
}
The relevant designer code is below:
System.Windows.Forms.ListViewItem listViewItem1 = new System.Windows.Forms.ListViewItem("item1");
System.Windows.Forms.ListViewItem listViewItem2 = new System.Windows.Forms.ListViewItem("item2");
this.listView1 = new System.Windows.Forms.ListView();
this.SuspendLayout();
//
// listView1
//
this.listView1.CheckBoxes = true;
listViewItem1.StateImageIndex = 0;
listViewItem2.StateImageIndex = 0;
this.listView1.Items.AddRange(new System.Windows.Forms.ListViewItem[] {
listViewItem1,
listViewItem2});
this.listView1.Location = new System.Drawing.Point(12, 12);
this.listView1.Name = "listView1";
this.listView1.Size = new System.Drawing.Size(401, 327);
this.listView1.TabIndex = 0;
this.listView1.UseCompatibleStateImageBehavior = false;
this.listView1.ItemActivate += new System.EventHandler(this.listView1_ItemActivate);
this.listView1.ItemCheck += new System.Windows.Forms.ItemCheckEventHandler(this.listView1_ItemCheck);
this.listView1.ItemSelectionChanged += new System.Windows.Forms.ListViewItemSelectionChangedEventHandler(this.listView1_ItemSelectionChanged);
this.listView1.SelectedIndexChanged += new System.EventHandler(this.listView1_SelectedIndexChanged);
Update: The issue I am facing because of the timer is that after hovering with the rubberband a ListViewItem, there is the useless delay of the timer before the item gets checked. When the user resizes/moves the rubberband so that the ListViewItem is no longer checked, there is the same delay. If the user does not know of that non-standard delay, the selection can be wrong.

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")
);

When getting my emails from my pop3 account the progressBar percentages is getting to 99% why?

What I get is 99% and on the label8 I see 1 and not 0 and the progressBar should get to 100%.
This is the backgroundworker dowork and progresschanged and completed events:
private int numberofallmessages = 0;
private int countMsg = 0;
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
OpenPop.Pop3.Pop3Client PopClient = new OpenPop.Pop3.Pop3Client();
PopClient.Connect("mail.bezeqint.net", 110, false);
PopClient.Authenticate("mymeila", "mypass",
OpenPop.Pop3.AuthenticationMethod.UsernameAndPassword);
int messageCount = PopClient.GetMessageCount();
numberofallmessages = messageCount;
allMessages = new List<OpenPop.Mime.Message>(messageCount);
for (int i = messageCount; i > 0; i--)
{
if (backgroundWorker1.CancellationPending == true)
{
e.Cancel = true;
return;
}
allMessages.Add(PopClient.GetMessage(i));
int nProgress = (messageCount - i + 1) * 100 / messageCount;
backgroundWorker1.ReportProgress(nProgress, PopClient.GetMessageCount().ToString() + "/" + i);
}
PopClient.Disconnect();
}
private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
pbt.Value = e.ProgressPercentage;
pbt.Text = e.ProgressPercentage.ToString() + "%";
label8.Text = e.UserState.ToString();
label8.Visible = true;
lstMail.Items.Add(allMessages[countMsg].Headers.Subject);
countMsg += 1;
}
private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
if (closingForm)
this.Close();
}
In the constructor I start the backgroundworker and set the progressBar (pbt) to 0%.
backgroundWorker1.RunWorkerAsync();
pbt.Text = "0%";
This is the progressBar code:
In top of form1:
ProgressBarWithText pbt = new ProgressBarWithText();
In constructor:
pbt.Size = new Size(216, 10);
pbt.Location = new Point(8, 312);
groupBox1.Controls.Add(pbt);
The ProgressBarWithText class:
public class ProgressBarWithText : ProgressBar
{
const int WmPaint = 15;
SizeF TextSize;
PointF TextPos;
bool dontpaint = false;
public ProgressBarWithText()
{
this.DoubleBuffered = true;
this.TextChanged += ProgressBarWithText_TextChanged;
this.SizeChanged += ProgressBarWithText_SizeChanged;
}
public override string Text
{
get { return base.Text; }
set { base.Text = value; }
}
void RecalcTextPos()
{
if (this.IsDisposed == true)
return;
if (string.IsNullOrEmpty(base.Text))
return;
using (var graphics = Graphics.FromHwnd(this.Handle))
{
TextSize = graphics.MeasureString(base.Text, this.Font);
TextPos.X = (this.Width / 2) - (TextSize.Width / 2);
TextPos.Y = (this.Height / 2) - (TextSize.Height / 2);
}
}
void ProgressBarWithText_SizeChanged(object sender, EventArgs e)
{
RecalcTextPos();
}
void ProgressBarWithText_TextChanged(object sender, EventArgs e)
{
RecalcTextPos();
}
protected override void WndProc(ref System.Windows.Forms.Message m)
{
base.WndProc(ref m);
if (dontpaint == false)
{
switch (m.Msg)
{
case WmPaint:
using (var graphics = Graphics.FromHwnd(Handle))
graphics.DrawString(base.Text, base.Font, Brushes.Black, TextPos.X, TextPos.Y);
break;
}
}
}
protected override CreateParams CreateParams
{
get
{
CreateParams result = base.CreateParams;
result.ExStyle |= 0x02000000; // WS_EX_COMPOSITED
return result;
}
}
}
The question is if I really downloaded all the emails or there is one left? And how to change/set the code is it will get to 100% and 0 emails downloaded count?
I did a test now I changed the line:
int messageCount = PopClient.GetMessageCount();
To
int messageCount = 5;
And I see in the listView I added to the designer that there are 5 emails.
But what I see in label8 is 7011/1 7011 is the overall emails in the account but for the test I'm downloading only 5. Again it stopped on 1 not 0.
And the progressBar stopped on 80% the text is 80% but I see the green color in the progressBar moved to the end to 100%.
Why it's stopping on 1 and why I see 80%?

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();
}

Drag and drop files into program

I'm using MonoDevelop tool.
I want to make program like below with GTK#;
1. User drags file to program's listView, tableView or whatever
2. Dragged file's list is printed on the program's window
But I'm almost new to GTK# and find the way how to drag and drop,
so I searched information about it and found this link like below.
http://developer.gnome.org/gtkmm-tutorial/3.0/sec-dnd-example.html.en
This is the code I tried to make program link suggested
(This link explains drag and drop in C++ and I had to make it the way like C#)
using Gtk;
using System;
using System.Collections;
using System.Collections.Generic;
namespace DragAndDrop
{
public class SharpApp: Window
{
Button btnDrag;
Label lblDrop;
HBox hbox;
public SharpApp (): base("Title")
{
btnDrag = new Button("Drag Here");
lblDrop = new Label("Drop Here");
hbox = new HBox();
SetDefaultSize(250,200);
SetPosition (Gtk.WindowPosition.Center);
DeleteEvent += (o, args) => Application.Quit ();
// Targets
List<TargetEntry> list
= new List<TargetEntry> ();
list.Add (new TargetEntry
("STRING", TargetFlags.Widget, 0));
list.Add (new TargetEntry
("text/plain", TargetFlags.Widget, 0));
// Drag site -----
// Make btnDrag a DnD drag source:
TargetEntry[] entries = list.ToArray();
TargetEntry[] se = new TargetEntry[] {entries[0]};
Drag.SourceSet (btnDrag, Gdk.ModifierType.ModifierMask,
se, Gdk.DragAction.Copy);
// Connect signals
btnDrag.DragDataGet += delegate
(object o, DragDataGetArgs args) {
Console.WriteLine ("Test");
OnDragDataGet(args.Context,
args.SelectionData,
args.Info,
args.Time);
};
hbox.PackStart (btnDrag);
// Drop site -----
// Make lblDrop a DnD drop destination:
TargetEntry[] de = new TargetEntry[] {entries[1]};
Drag.DestSet (lblDrop, DestDefaults.Drop,
de, Gdk.DragAction.Copy);
// Connect signals
lblDrop.DragDataReceived += delegate
(object o, DragDataReceivedArgs args) {
Console.WriteLine ("Test");
OnDragDataReceived(args.Context,
args.X,
args.Y,
args.SelectionData,
args.Info,
args.Time);
};
// hbox
hbox.PackStart (lblDrop);
Add (hbox);
ShowAll ();
}
// event handlers
protected override void OnDragDataGet
(Gdk.DragContext context, SelectionData sdata,
uint info, uint time)
{
Console.WriteLine ("OnDragDataGet");
string tmp = "I'm data!";
byte[] b = new byte[tmp.Length];
for (int i=0; i<tmp.Length; ++i)
b[i] = (byte)tmp[i];
sdata.Set(sdata.Target, 8, b, tmp.Length);
}
protected override void OnDragDataReceived
(Gdk.DragContext context, int x, int y,
SelectionData sdata, uint info, uint time)
{
Console.WriteLine ("OnDragDataReceived");
int length = sdata.Length;
if ((length>=0) && (sdata.Format==8))
{
Console.WriteLine ("Received \"{0}\" in label",
sdata.Data.ToString());
}
Drag.Finish (context, false, false, time);
}
// main
public static void Main (string[] args)
{
Application.Init ();
new SharpApp();
Application.Run ();
}
}
}
but the result tells me I might be wrong.. I thought the button will be moved
when I drag it, but the button didn't move at all. Is there anyone able to fix my problem?

The following example prints into a label (called lblPath) the full path of the files dropped over it:
public partial class MainWindow: Gtk.Window
{
/** Add a label to your project called lblPath **/
public MainWindow () : base (Gtk.WindowType.Toplevel)
{
Build ();
//media type we'll accept
Gtk.TargetEntry [ ] target_table =
new TargetEntry [ ] {
new TargetEntry ("text/uri-list", 0, 0),
new TargetEntry ("application/x-monkey", 0, 1),
};
Gtk.Drag.DestSet (lblPath, DestDefaults.All, target_table, Gdk.DragAction.Copy);
lblPath.DragDataReceived += new Gtk.DragDataReceivedHandler(OnLabelDragDataReceived);
}
void OnLabelDragDataReceived (object sender, Gtk.DragDataReceivedArgs args)
{
if (args.SelectionData.Length > 0) {
byte[] data = args.SelectionData.Data;
string files = System.Text.Encoding.UTF8.GetString (data);
string file;
string[] fileArray = files.Split ('\n');
for (int i = 0; i < fileArray.Length - 1; i++) { //the last element is empty
file = fileArray [i].Replace ("\r", "");
if (file.StartsWith("file://"))
file = file.Substring(7); //for Windows should be 8
lblPath.Text += file + "\n";
}
}
}
}

Self answer
I found tutorials about drag and drop here:
https://github.com/mono/gtk-sharp/blob/master/sample/TestDnd.cs
http://my.safaribooksonline.com/book/programming/mono/0596007922/gtksharp/monoadn-chp-4-sect-8
and I made a tutorial of drag and drop myself.
This is drop file tutorial.
using System;
using System.Collections;
using System.Collections.Generic;
// 1. Drop file tutorial
namespace DropFile
{
public class App: Gtk.Window
{
Gtk.Label lbldrop;
public App (): base ("Drop file")
{
this.SetDefaultSize (250, 200);
this.SetPosition (Gtk.WindowPosition.Center);
this.DeleteEvent += OnTerminated;
this.lbldrop = new Gtk.Label ("Drop here!");
Gtk.Drag.DestSet (this.lbldrop, 0, null, 0);
this.lbldrop.DragDrop
+= new Gtk.DragDropHandler
(OnLabelDragDrop);
this.lbldrop.DragDataReceived
+= new Gtk.DragDataReceivedHandler
(OnLabelDragDataReceived);
Gtk.VBox vbox = new Gtk.VBox ();
vbox.PackStart (this.lbldrop, true, true, 0);
this.Add (vbox);
this.ShowAll ();
}
void OnLabelDragDrop (object sender, Gtk.DragDropArgs args)
{
Gtk.Drag.GetData
((Gtk.Widget)sender, args.Context,
args.Context.Targets[0], args.Time);
}
void OnLabelDragDataReceived
(object sender, Gtk.DragDataReceivedArgs args)
{
if (args.SelectionData.Length > 0
&& args.SelectionData.Format == 8) {
byte[] data = args.SelectionData.Data;
string encoded = System.Text.Encoding.UTF8.GetString (data);
// I don't know what last object is,
// but I tested and noticed that it is not
// a path
List<string> paths
= new List<string> (encoded.Split ('\r', '\n'));
paths.RemoveAll (string.IsNullOrEmpty);
paths.RemoveAt (paths.Count-1);
for (int i=0; i<paths.Count; ++i)
{
Console.WriteLine ("Path {0}: {1}", i, paths[i]);
}
}
}
bool Test (string str)
{
return true;
}
void OnTerminated (object sender, EventArgs args)
{
Gtk.Application.Quit ();
}
public static void Main (string[] args)
{
Gtk.Application.Init ();
new App ();
Gtk.Application.Run ();
}
}
}
And this is drag button tutorial.
using System;
// 2. Drag button tutorial
namespace DragButton
{
public class App: Gtk.Window
{
enum StatusType
{
Checked,
NotChecked
}
Gtk.Button btnDrag;
Gtk.Label lblDrop;
bool isChecked;
Gtk.Statusbar sBar;
public App (): base("Drag And Drop Complete")
{
this.SetDefaultSize (250, 200);
this.SetPosition (Gtk.WindowPosition.Center);
this.DeleteEvent += OnTerminated;
this.isChecked = false;
this.sBar = new Gtk.Statusbar ();
sBar.Push ((uint)StatusType.NotChecked, "Not checked");
this.btnDrag = new Gtk.Button ("Drag here");
Gtk.Drag.SourceSet
(this.btnDrag,
Gdk.ModifierType.Button1Mask
| Gdk.ModifierType.Button3Mask,
null,
Gdk.DragAction.Copy | Gdk.DragAction.Move);
this.btnDrag.DragDataGet
+= new Gtk.DragDataGetHandler
(HandleSourceDragDataGet);
this.btnDrag.DragDataDelete
+= new Gtk.DragDataDeleteHandler
(HandleSourceDragDataDelete);
// set drop label as destination
this.lblDrop = new Gtk.Label ("Drop here");
Gtk.Drag.DestSet (this.lblDrop, 0, null, 0);
this.lblDrop.DragMotion
+= new Gtk.DragMotionHandler
(HandleTargetDragMotion);
this.lblDrop.DragDrop
+= new Gtk.DragDropHandler
(HandleTargetDragDrop);
this.lblDrop.DragDataReceived
+= new Gtk.DragDataReceivedHandler
(this.HandleTargetDragDataReceived);
this.lblDrop.DragDrop
+= new Gtk.DragDropHandler
(this.HandleStatBarDragDrop);
Gtk.MenuBar bar = new Gtk.MenuBar ();
Gtk.MenuItem item = new Gtk.MenuItem ("File");
Gtk.Menu menu = new Gtk.Menu ();
item.Submenu = menu;
bar.Append (item);
// accel key
Gtk.AccelGroup ag = new Gtk.AccelGroup ();
this.AddAccelGroup (ag);
item = new Gtk.MenuItem ("Quit");
item.Activated += OnTerminated;
item.AddAccelerator
("activate", ag, new Gtk.AccelKey
(Gdk.Key.Q, Gdk.ModifierType.ControlMask,
Gtk.AccelFlags.Visible));
menu.Append (item);
Gtk.VBox vbox = new Gtk.VBox();
vbox.PackStart (bar, false, false, 0);
Gtk.HBox hbox = new Gtk.HBox ();
hbox.PackStart (this.btnDrag, true, true, 0);
hbox.PackStart (this.lblDrop, true, true, 0);
vbox.PackStart (hbox, true, true, 0);
vbox.PackStart (sBar, false, false, 0);
this.Add (vbox);
this.ShowAll ();
}
void OnTerminated(object sender, EventArgs args)
{
Gtk.Application.Quit ();
}
void HandleSourceDragDataGet
(object sender, Gtk.DragDataGetArgs args)
{
Console.WriteLine ("Source Drag Data Get");
args.SelectionData.Text = "I'm data!";
}
void HandleSourceDragDataDelete
(object sender, Gtk.DragDataDeleteArgs args)
{
Console.WriteLine ("Source Drag Data Delete");
Console.WriteLine ("Delete the data!");
}
void HandleTargetDragMotion
(object sender, Gtk.DragMotionArgs args)
{
Gdk.Drag.Status (args.Context,
args.Context.SuggestedAction,
args.Time);
args.RetVal = true;
}
void HandleTargetDragDrop
(object sender, Gtk.DragDropArgs args)
{
Console.WriteLine ("drop");
if (args.Context.Targets.Length != 0) {
Gtk.Drag.GetData
((Gtk.Widget)sender, args.Context,
args.Context.Targets[0], args.Time);
args.RetVal = true;
}
args.RetVal = false;
}
void HandleTargetDragDataReceived
(object sender, Gtk.DragDataReceivedArgs args)
{
Console.WriteLine ("received");
if (args.SelectionData.Length >= 0
&& args.SelectionData.Format == 8)
{
Console.WriteLine ("Hi!");
Gtk.Drag.Finish (args.Context, true, false, args.Time);
}
Gtk.Drag.Finish (args.Context, false, false, args.Time);
}
void HandleStatBarDragDrop
(object sender, Gtk.DragDropArgs args)
{
isChecked = !isChecked;
if (isChecked)
sBar.Push ((uint)StatusType.Checked, "Checked");
else
sBar.Pop ((uint)StatusType.Checked);
}
public static void Main (string[] args)
{
Gtk.Application.Init ();
new App ();
Gtk.Application.Run ();
}
}
}