Creating a GTK notification area icon using Mono and C#
转载自：http://www.dijksterhuis.org/creating-gtk-notification-area-icon-mono/
Cool (Linux) applications have their own icon in the notification area. To add my own icon in the Gnome notification area using Mono only took a few lines of code. In the post below I show how you can add your icon and associate a tooltip and right click menu to it.
GTK provides the StatusIcon class to register your own icon in the notification area.
StatusIcon myStatusIcon;
You can provide and load your own icon, but for this example I used one of the GTK stock icons.
myStatusIcon
=
StatusIcon.NewFromStock(Stock.Harddisk);
//
I use a stock icon from Stock.*
//
to avoid having to include an icon file
myStatusIcon.Visible
=
true
;
//
Make sure we are displayed
Adding or changing a tooltip is as straighforward as assigning it:
//
The message to show when the mouse hovers over the icon
myStatusIcon.Tooltip
=
"
Hello World ToolTip
"
;
To create a rightclick menu we need to register the PopupMenu event handler:
myStatusIcon.PopupMenu
+=
OnStatusIconPopupMenu;
//
Link in the right click popup menu
/*
The Status Popup menu is shown when the user right clicks on the toolbar icon
*/
protected
void
OnStatusIconPopupMenu(
object
sender, EventArgs e)
{
Menu popupMenu
=
new
Menu();
MenuItem helloItem
=
new
MenuItem(
"
About Hello World
"
);
helloItem.Show();
helloItem.Activated
+=
new
EventHandler(OnHelloAboutActivated);
popupMenu.Append(helloItem);
popupMenu.Popup(
null
,
null
,
null
,
3
,Gtk.Global.CurrentEventTime);
}
And that is really all there is to it. I have included the complete code below. If you create a new GTK solution in MonoDevelop you will end up with two files, Main.cs and MainWindows.Cs. Replace the MainWindow.CS file with the content below:
using
System;
using
Gtk;
public
partial
class
MainWindow: Gtk.Window
{
StatusIcon myStatusIcon;
AboutDialog aboutDialog;
public
MainWindow ():
base
(Gtk.WindowType.Toplevel)
{
/*
The following lines create the notification area status icon
*/
/*
Make it visible and link in the right click popup menu
*/
myStatusIcon
=
StatusIcon.NewFromStock(Stock.Harddisk);
//
I use a stock icon from Stock.*
//
to avoid having to include an icon file
myStatusIcon.Tooltip
=
"
Hello World ToolTip
"
;
//
The message to show when the mouse hovers over the icon
myStatusIcon.Visible
=
true
;
//
Make sure we are displayed
myStatusIcon.PopupMenu
+=
OnStatusIconPopupMenu;
//
Link in the right click popup menu
/*
Not necessary
*/
Label AppWindowLabel
=
new
Label(
"
Hello World
"
);
this
.Add(AppWindowLabel);
Build ();
}
/*
Called when the main application closes
*/
protected
void
OnDeleteEvent (
object
sender, DeleteEventArgs a)
{
Application.Quit ();
a.RetVal
=
true
;
}
/*
The Status Popup menu is shown when the user right clicks on the toolbar icon
*/
protected
void
OnStatusIconPopupMenu(
object
sender, EventArgs e)
{
Menu popupMenu
=
new
Menu();
MenuItem helloItem
=
new
MenuItem(
"
About Hello World
"
);
helloItem.Show();
helloItem.Activated
+=
new
EventHandler(OnHelloAboutActivated);
popupMenu.Append(helloItem);
popupMenu.Popup(
null
,
null
,
null
,
3
,Gtk.Global.CurrentEventTime);
}
/*
If the user select the "About Hello World" menu option, we show the about dialog
*/
protected
void
OnHelloAboutActivated(
object
sender, EventArgs e)
{
aboutDialog
=
new
AboutDialog();
aboutDialog.ProgramName
=
"
The About Dialog Popup Demo
"
;
aboutDialog.Version
=
"
1.0beta
"
;
aboutDialog.Comments
=
"
The best things in life are simple!
"
;
aboutDialog.License
=
"
Creative Commons
"
;
aboutDialog.Authors
=
new
string
[] {
"
Martijn Dijksterhuis
"
};
aboutDialog.Website
=
"
http://www.dijksterhuis.org
"
;
aboutDialog.Response
+=
new
ResponseHandler(OnHelloAboutClose);
aboutDialog.Run();
}
/*
Catch the "Close" and "X" button event from the about dialog box
*/
protected
void
OnHelloAboutClose(
object
sender, ResponseArgs e)
{
if
(e.ResponseId
==
ResponseType.Cancel
||
e.ResponseId
==
ResponseType.DeleteEvent)
aboutDialog.Destroy();
}
}