I'm just digging into menus. I wrote several tests for a menubar by itself, a single menu with a single item, a single menu with several items, two menus (each with several items, and one with mnemonics attached to some items.
But when I moved on to do a test with submenus, I ran into something odd. Everything compiles and runs normally except that when the window appears and I click on the File menu, a blue line appears under the word File, but the menu doesn't drop. I click it a second time and everything's normal.
I stripped it down to just one menu, one item on the menu which is a submenu, and one item on the submenu. The behaviour is still the same. Here's the boiled down code:
import std.stdio;
import gtk.MainWindow;
import gtk.Box;
import gtk.Main;
import gtk.Menu;
import gtk.MenuBar;
import gtk.MenuItem;
import gtk.Widget;
import gdk.Event;
void main(string[] args)
{
Main.init(args);
TestRigWindow testRig = new TestRigWindow();
Main.run();
} // main()
class TestRigWindow : MainWindow
{
string title = "Multiple Menus Example";
this()
{
super(title);
setDefaultSize(640, 480);
addOnDestroy(&quitApp);
AppBox appBox = new AppBox();
add(appBox);
showAll();
} // this()
void quitApp(Widget w)
{
// do other exit stuff here if necessary
Main.quit();
} // quitApp()
} // TestRigWindow
class AppBox : Box
{
int padding = 10;
MyMenuBar menuBar;
this()
{
super(Orientation.VERTICAL, padding);
menuBar = new MyMenuBar();
packStart(menuBar, false, false, 0);
} // this()
} // class AppBox
class MyMenuBar : MenuBar
{
string fileHeaderLabel = "File";
FileHeader fileHeader;
this()
{
super();
fileHeader = new FileHeader(fileHeaderLabel);
append(fileHeader);
} // this()
} // class MyMenuBar
class FileHeader : MenuItem
{
FileMenu fileMenu;
// arg: a Menu object
this(string headerTitle)
{
super(headerTitle);
fileMenu = new FileMenu();
setSubmenu(fileMenu);
} // this()
} // class MenuHeader
class FileMenu : Menu
{
NewFileItem newFileItem;
// arg: an array of items
this()
{
super();
newFileItem = new NewFileItem();
append(newFileItem);
} // this()
} // class FileMenu
class NewFileItem : MenuItem
{
string itemLabel = "New";
NewFileSubMenu newFileSubMenu;
this()
{
super(itemLabel);
addOnActivate(&doSomething);
newFileSubMenu = new NewFileSubMenu();
setSubmenu(newFileSubMenu);
} // this()
void doSomething(MenuItem mi)
{
writeln("New file created.");
} // doSomethingNew()
} // class NewFileItem
class NewFileSubMenu : Menu
{
DFileItem dFileItem;
this()
{
super();
dFileItem = new DFileItem();
append(dFileItem);
} // this()
} // class NewFileSubMenu
class DFileItem : MenuItem
{
string itemLabel = "D Source File";
this()
{
super(itemLabel);
addOnActivate(&doSomething);
} // this()
void doSomething(MenuItem mi)
{
writeln("Dialog appears with filter: '*.d'");
} // doSomething()
} // class UndoItem
