/*
* This function destroys a window and all of its subwindows. Actually,
* another function, defined in freeglut_window.c is called, but this is
* a whole different story...
*/
void fgDestroyWindow( SFG_Window* window )
{
FREEGLUT_INTERNAL_ERROR_EXIT ( window, "Window destroy function called with null window",
"fgDestroyWindow" );
while( window->Children.First )
fgDestroyWindow( ( SFG_Window * )window->Children.First );
{
SFG_Window *activeWindow = fgStructure.CurrentWindow;
INVOKE_WCB( *window, Destroy, ( ) );
fgSetWindow( activeWindow );
}
if( window->Parent )
fgListRemove( &window->Parent->Children, &window->Node );
else
fgListRemove( &fgStructure.Windows, &window->Node );
if( window->ActiveMenu )
fgDeactivateMenu( window );
fghClearCallBacks( window );
fgCloseWindow( window );
free( window );
if( fgStructure.CurrentWindow == window )
fgStructure.CurrentWindow = NULL;
}
void fgPlatformCheckMenuDeactivate()
{
/* If we have an open menu, see if the open menu should be closed
* when focus was lost because user either switched
* application or FreeGLUT window (if one is running multiple
* windows). If so, close menu the active menu.
*/
SFG_Menu* menu = NULL;
if ( fgStructure.Menus.First )
menu = fgGetActiveMenu();
if ( menu )
{
SFG_Window* wnd = NULL;
HWND hwnd = GetFocus(); /* Get window with current focus - NULL for non freeglut windows */
if (hwnd)
/* See which of our windows it is */
wnd = fgWindowByHandle(hwnd);
if (!hwnd || !wnd)
/* User switched to another application*/
fgDeactivateMenu(menu->ParentWindow);
else if (!wnd->IsMenu) /* Make sure we don't kill the menu when trying to enter a submenu */
{
if (wnd!=menu->ParentWindow)
/* User switched to another FreeGLUT window */
fgDeactivateMenu(menu->ParentWindow);
else
{
/* Check if focus lost because non-client area of
* window was pressed (pressing on client area is
* handled in fgCheckActiveMenu)
*/
POINT mouse_pos;
RECT clientArea;
fghGetClientArea(&clientArea,menu->ParentWindow, GL_FALSE);
GetCursorPos(&mouse_pos);
if ( !PtInRect( &clientArea, mouse_pos ) )
fgDeactivateMenu(menu->ParentWindow);
}
}
}
};
/*
* Activates a menu pointed by the function argument
*/
static void fghActivateMenu( SFG_Window* window, int button )
{
int max_x, max_y;
SFG_XYUse mouse_pos;
/* We'll be referencing this menu a lot, so remember its address: */
SFG_Menu* menu = window->Menu[ button ];
SFG_Window* current_window = fgStructure.CurrentWindow;
/* If the menu is already active in another window, deactivate it (and any submenus) there */
if ( menu->ParentWindow )
fgDeactivateMenu(menu->ParentWindow);
/* Mark the menu as active, so that it gets displayed: */
window->ActiveMenu = menu;
menu->IsActive = GL_TRUE;
fghSetMenuParentWindow ( window, menu );
fgState.ActiveMenus++;
/* Set up the initial menu position now: */
fghGetVMaxExtent(menu->ParentWindow, &max_x, &max_y);
fgSetWindow( window );
/* get mouse position on screen (window->State.MouseX and window->State.MouseY
* are relative to client area origin), and not easy to correct given that
* glutGet( GLUT_WINDOW_X ) and glutGet( GLUT_WINDOW_Y ) return relative to parent
* origin when looking at a child window
* for parent windows: window->State.MouseX + glutGet( GLUT_WINDOW_X ) == mouse_pos.X
*/
fghGetCursorPos(&mouse_pos);
menu->X = mouse_pos.X;
menu->Y = mouse_pos.Y;
/* Make sure the whole menu is on the screen */
if( menu->X + menu->Width > max_x )
menu->X -=menu->Width;
if( menu->Y + menu->Height > max_y )
{
menu->Y -=menu->Height;
if( menu->Y < 0 )
menu->Y = 0;
}
/* Set position of mouse relative to top-left menu in menu's window state (could as well set 0 at creation time...) */
menu->Window->State.MouseX = mouse_pos.X - menu->X;
menu->Window->State.MouseY = mouse_pos.Y - menu->Y;
/* Menu status callback */
if (fgState.MenuStateCallback || fgState.MenuStatusCallback)
{
fgStructure.CurrentMenu = menu;
fgStructure.CurrentWindow = window;
if (fgState.MenuStateCallback)
fgState.MenuStateCallback(GLUT_MENU_IN_USE);
if (fgState.MenuStatusCallback)
/* window->State.MouseX and window->State.MouseY are relative to client area origin, as needed */
fgState.MenuStatusCallback(GLUT_MENU_IN_USE, window->State.MouseX, window->State.MouseY);
}
fgSetWindow( menu->Window );
glutPositionWindow( menu->X, menu->Y );
glutReshapeWindow( menu->Width, menu->Height );
glutPopWindow( );
glutShowWindow( );
menu->Window->ActiveMenu = menu;
fghCheckMenuStatus( menu );
fgSetWindow( current_window );
}
/*
* Check whether an active menu absorbs a mouse click
*/
GLboolean fgCheckActiveMenu ( SFG_Window *window, int button, GLboolean pressed,
int mouse_x, int mouse_y )
{
/*
* Near as I can tell, this is the menu behaviour:
* - Down-click the menu button, menu not active: activate
* the menu with its upper left-hand corner at the mouse
* location.
* - Down-click any button outside the menu, menu active:
* deactivate the menu
* - Down-click any button inside the menu, menu active:
* select the menu entry and deactivate the menu
* - Up-click the menu button, menu not active: nothing happens
* - Up-click the menu button outside the menu, menu active:
* nothing happens
* - Up-click the menu button inside the menu, menu active:
* select the menu entry and deactivate the menu
* Since menus can have submenus, we need to check this recursively.
*/
if( window->ActiveMenu )
{
if( window == window->ActiveMenu->ParentWindow )
{
window->ActiveMenu->Window->State.MouseX =
mouse_x - window->ActiveMenu->X;
window->ActiveMenu->Window->State.MouseY =
mouse_y - window->ActiveMenu->Y;
}
/* In the menu, invoke the callback and deactivate the menu */
if( fghCheckMenuStatus( window->ActiveMenu ) )
{
/*
* Save the current window and menu and set the current
* window to the window whose menu this is
*/
SFG_Window *save_window = fgStructure.CurrentWindow;
SFG_Menu *save_menu = fgStructure.CurrentMenu;
SFG_Window *parent_window = window->ActiveMenu->ParentWindow;
fgSetWindow( parent_window );
fgStructure.CurrentMenu = window->ActiveMenu;
/* Execute the menu callback */
fghExecuteMenuCallback( window->ActiveMenu );
fgDeactivateMenu( parent_window );
/* Restore the current window and menu */
fgSetWindow( save_window );
fgStructure.CurrentMenu = save_menu;
}
else if( pressed )
/*
* Outside the menu, deactivate if it's a downclick
*
* A downclick outside of the interior of our freeglut windows
* is dealt with in the WM_KILLFOCUS handler of fgPlatformWindowProc
*/
fgDeactivateMenu( window->ActiveMenu->ParentWindow );
/*
* XXX Why does an active menu require a redisplay at
* XXX this point? If this can come out cleanly, then
* XXX it probably should do so; if not, a comment should
* XXX explain it.
*/
if( ! window->IsMenu )
window->State.Redisplay = GL_TRUE;
return GL_TRUE;
}
/* No active menu, let's check whether we need to activate one. */
if( ( 0 <= button ) &&
( FREEGLUT_MAX_MENUS > button ) &&
( window->Menu[ button ] ) &&
pressed )
{
/* XXX Posting a requisite Redisplay seems bogus. */
window->State.Redisplay = GL_TRUE;
fghActivateMenu( window, button );
return GL_TRUE;
}
return GL_FALSE;
}
/*
* Check whether an active menu absorbs a mouse click
*/
GLboolean fgCheckActiveMenu ( SFG_Window *window, int button, GLboolean pressed,
int mouse_x, int mouse_y )
{
GLboolean is_handled = GL_FALSE;
GLboolean is_clicked = GL_FALSE;
/*
* Near as I can tell, this is the menu behaviour:
* - Down-click the menu button, menu not active: activate
* the menu with its upper left-hand corner at the mouse
* location.
* - Down-click any button outside the menu, menu active:
* deactivate the menu, and potentially activate a new menu
* at the new mouse location. This includes clicks in
* different windows of course
* - Down-click any button inside the menu, menu active:
* select the menu entry and deactivate the menu
* - Up-click the menu button, menu not active: nothing happens
* - Up-click the menu button outside the menu, menu active:
* nothing happens
* - Up-click the menu button inside the menu, menu active:
* select the menu entry and deactivate the menu
* Since menus can have submenus, we need to check this recursively.
*/
if( window->ActiveMenu )
{
if( window == window->ActiveMenu->ParentWindow )
{
window->ActiveMenu->Window->State.MouseX =
mouse_x - window->ActiveMenu->X;
window->ActiveMenu->Window->State.MouseY =
mouse_y - window->ActiveMenu->Y;
}
/* In the menu, deactivate the menu and invoke the callback */
if( fghCheckMenuStatus( window->ActiveMenu ) )
{
/*
* Save the current window and menu and set the current
* window to the window whose menu this is
*/
SFG_Window *save_window = fgStructure.CurrentWindow;
SFG_Menu *save_menu = fgStructure.CurrentMenu, *active_menu = window->ActiveMenu; /* active menu is always the one with the mouse in it, due to fghCheckMenuStatus */
SFG_MenuEntry *active_entry = active_menu->ActiveEntry; /* currently highlighted item -> must be the one that was just clicked */
SFG_Window *parent_window = window->ActiveMenu->ParentWindow;
/* ignore clicks on the submenu entry */
if (!active_entry->SubMenu)
{
fgSetWindow( parent_window );
fgStructure.CurrentMenu = active_menu;
/* Deactivate menu and then call callback (we don't want menu to stay in view while callback is executing, and user should be able to change menus in callback) */
fgDeactivateMenu( parent_window );
active_menu->Callback( active_entry->ID );
/* Restore the current window and menu */
fgSetWindow( save_window );
fgStructure.CurrentMenu = save_menu;
}
is_clicked = GL_TRUE; /* Don't reopen... */
}
else if( pressed )
/*
* Outside the menu, deactivate if it's a downclick
*
* A downclick outside of the interior of our freeglut windows
* is dealt with in the WM_KILLFOCUS handler of fgPlatformWindowProc
*/
{
fgDeactivateMenu( window->ActiveMenu->ParentWindow );
/* Could reopen again in different location, as is_clicked remains false */
}
is_handled = GL_TRUE;
}
else if ( fgState.ActiveMenus ) /* Don't have to check whether this was a downpress or an uppress, there is no way to get an uppress in another window before a downpress... */
{
/* if another window than the one clicked in has an open menu, close it */
SFG_Menu *menu = fgGetActiveMenu();
if ( menu ) /* any open menu? */
fgDeactivateMenu( menu->ParentWindow );
/* Leave is_handled to false, we didn't do anything relevant from the perspective of the window that was clicked */
}
/* No active menu, let's check whether we need to activate one. */
if( !is_clicked &&
( 0 <= button ) &&
( FREEGLUT_MAX_MENUS > button ) &&
( window->Menu[ button ] ) &&
pressed )
{
/* If mouseclick was outside the parent window, ignore. This can
* happen when another mouse button is already depressed and the
* window thus has mouse capture
*/
if (window->State.MouseX>0 && window->State.MouseY>0 &&
window->State.MouseX<window->State.Width && window->State.MouseY<window->State.Height)
{
fghActivateMenu( window, button );
is_handled = GL_TRUE;
}
}
return is_handled;
}