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FreeGLUT-Vita/freeglut/freeglut/src/freeglut_menu.c
cjp 3f70f7bdf2 Replace TRUE with GL_TRUE and FALSE with GL_FALSE where the type is 
GLboolean.


git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@352 7f0cb862-5218-0410-a997-914c9d46530a
2003-11-15 19:06:28 +00:00

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/*
* freeglut_menu.c
*
* Pull-down menu creation and handling.
*
* Copyright (c) 1999-2000 Pawel W. Olszta. All Rights Reserved.
* Written by Pawel W. Olszta, <olszta@sourceforge.net>
* Creation date: Thu Dec 16 1999
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "../include/GL/freeglut.h"
#include "freeglut_internal.h"
/* -- DEFINITIONS ---------------------------------------------------------- */
/*
* FREEGLUT_MENU_FONT can be any freeglut bitmapped font.
* (Stroked fonts would not be out of the question, but we'd need to alter
* code, since GLUT (hence freeglut) does not quite unify stroked and
* bitmapped font handling.)
* Old UNIX/X11 GLUT (BSD, UNIX, IRIX, LINUX, HPUX, ...) used a system
* font best approximated by an 18-pixel HELVETICA, I think. MS-WINDOWS
* GLUT used something closest to the 8x13 fixed-width font. (Old
* GLUT apparently uses host-system menus rather than building its own.
* freeglut is building its own menus from scratch.)
*
* FREEGLUT_MENU_HEIGHT gives the height of ONE menu box. This should be
* the distances between two adjacent menu entries. It should scale
* automatically with the font choice, so you needn't alter it---unless you
* use a stroked font.
*
* FREEGLUT_MENU_BORDER says how many pixels to allow around the edge of a
* menu. (It also seems to be the same as the number of pixels used as
* a border around *items* to separate them from neighbors. John says
* that that wasn't the original intent...if not, perhaps we need another
* symbolic constant, FREEGLUT_MENU_ITEM_BORDER, or such.)
*/
#if TARGET_HOST_WIN32
#define FREEGLUT_MENU_FONT GLUT_BITMAP_8_BY_13
#else
#define FREEGLUT_MENU_FONT GLUT_BITMAP_HELVETICA_18
#endif
#define FREEGLUT_MENU_HEIGHT (glutBitmapHeight(FREEGLUT_MENU_FONT) + \
FREEGLUT_MENU_BORDER)
#define FREEGLUT_MENU_BORDER 2
/*
* These variables are for rendering the freeglut menu items.
*
* The choices are fore- and background, with and without h for Highlighting.
* Old GLUT appeared to be system-dependant for its colors (sigh) so we are
* too. These variables should be stuffed into global state and initialized
* via the glutInit*() system.
*/
#if TARGET_HOST_WIN32
static float menu_pen_fore [4] = {0.0f, 0.0f, 0.0f, 1.0f};
static float menu_pen_back [4] = {0.85f, 0.85f, 0.85f, 1.0f};
static float menu_pen_hfore [4] = {1.0f, 1.0f, 1.0f, 1.0f};
static float menu_pen_hback [4] = {0.15f, 0.15f, 0.45f, 1.0f};
#else
static float menu_pen_fore [4] = {0.0f, 0.0f, 0.0f, 1.0f};
static float menu_pen_back [4] = {0.70f, 0.70f, 0.70f, 1.0f};
static float menu_pen_hfore [4] = {0.0f, 0.0f, 0.0f, 1.0f};
static float menu_pen_hback [4] = {1.0f, 1.0f, 1.0f, 1.0f};
#endif
/* -- PRIVATE FUNCTIONS ---------------------------------------------------- */
/*
* Private function to find a menu entry by index
*/
static SFG_MenuEntry *fghFindMenuEntry( SFG_Menu* menu, int index )
{
SFG_MenuEntry *entry;
int i = 1;
for( entry = (SFG_MenuEntry *)menu->Entries.First;
entry;
entry = (SFG_MenuEntry *)entry->Node.Next )
{
if( i == index )
break;
++i;
}
return entry;
}
/*
* Private function to check for the current menu/sub menu activity state
*/
static GLboolean fghCheckMenuStatus( SFG_Window* window, SFG_Menu* menu )
{
SFG_MenuEntry* menuEntry;
int x, y;
/*
* First of all check any of the active sub menus...
*/
for( menuEntry = (SFG_MenuEntry *)menu->Entries.First;
menuEntry;
menuEntry = (SFG_MenuEntry *)menuEntry->Node.Next )
{
if( menuEntry->SubMenu && menuEntry->IsActive )
{
/*
* OK, have the sub-menu checked, too. If it returns TRUE, it
* will mean that it caught the mouse cursor and we do not need
* to regenerate the activity list, and so our parents do...
*/
GLboolean return_status = fghCheckMenuStatus( window,
menuEntry->SubMenu );
/*
* Reactivate the submenu as the checkMenuStatus may have turned
* it off if the mouse is in its parent menu entry.
*/
menuEntry->SubMenu->IsActive = GL_TRUE;
if ( return_status )
return GL_TRUE;
}
}
/*
* That much about our sub menus, let's get to checking the current menu:
*/
x = window->State.MouseX;
y = window->State.MouseY;
for( menuEntry = (SFG_MenuEntry *)menu->Entries.First;
menuEntry;
menuEntry = (SFG_MenuEntry *)menuEntry->Node.Next )
menuEntry->IsActive = GL_FALSE;
menu->IsActive = GL_FALSE;
/*
* Check if the mouse cursor is contained within the current menu box
*/
if( ( x >= FREEGLUT_MENU_BORDER ) &&
( x < menu->Width - FREEGLUT_MENU_BORDER ) &&
( y >= FREEGLUT_MENU_BORDER ) &&
( y < menu->Height - FREEGLUT_MENU_BORDER ) &&
( window == menu->Window ) )
{
int menuID = ( y - FREEGLUT_MENU_BORDER ) / FREEGLUT_MENU_HEIGHT;
/*
* The mouse cursor is somewhere over our box, check it out.
*/
menuEntry = fghFindMenuEntry( menu, menuID + 1 );
assert( menuEntry );
menuEntry->IsActive = GL_TRUE;
menuEntry->Ordinal = menuID;
/*
* If this is not the same as the last active menu entry, deactivate
* the previous entry. Specifically, if the previous active entry
* was a submenu then deactivate it.
*/
if( menu->ActiveEntry && ( menuEntry != menu->ActiveEntry ) )
if( menu->ActiveEntry->SubMenu )
fgDeactivateSubMenu( menu->ActiveEntry );
menu->ActiveEntry = menuEntry;
menu->IsActive = GL_TRUE;
/*
* OKi, we have marked that entry as active, but it would be also
* nice to have its contents updated, in case it's a sub menu.
* Also, ignore the return value of the check function:
*/
if( menuEntry->SubMenu )
{
if ( ! menuEntry->SubMenu->IsActive )
{
SFG_Window *current_window = fgStructure.Window;
/*
* Set up the initial menu position now...
*/
menuEntry->SubMenu->IsActive = GL_TRUE;
/*
* Set up the initial submenu position now:
*/
menuEntry->SubMenu->X = menu->X + menu->Width;
menuEntry->SubMenu->Y = menu->Y +
menuEntry->Ordinal * FREEGLUT_MENU_HEIGHT;
if( menuEntry->SubMenu->X + menuEntry->SubMenu->Width >
glutGet( GLUT_SCREEN_WIDTH ) )
menuEntry->SubMenu->X = menu->X -
menuEntry->SubMenu->Width;
if( menuEntry->SubMenu->Y + menuEntry->SubMenu->Height >
glutGet( GLUT_SCREEN_HEIGHT ) )
menuEntry->SubMenu->Y -= ( menuEntry->SubMenu->Height -
FREEGLUT_MENU_HEIGHT -
2 * FREEGLUT_MENU_BORDER );
fgSetWindow( menuEntry->SubMenu->Window );
glutPositionWindow( menuEntry->SubMenu->X,
menuEntry->SubMenu->Y );
glutReshapeWindow( menuEntry->SubMenu->Width,
menuEntry->SubMenu->Height );
glutPopWindow( );
glutShowWindow( );
menuEntry->SubMenu->Window->ActiveMenu = menuEntry->SubMenu;
fgSetWindow( current_window );
}
fghCheckMenuStatus( window, menuEntry->SubMenu );
/*
* Activate it because its parent entry is active
*/
menuEntry->SubMenu->IsActive = GL_TRUE;
}
/*
* Report back that we have caught the menu cursor
*/
return GL_TRUE;
}
/*
* Looks like the menu cursor is somewhere else...
*/
return GL_FALSE;
}
/*
* Displays a menu box and all of its submenus (if they are active)
*/
static void fghDisplayMenuBox( SFG_Menu* menu )
{
SFG_MenuEntry *menuEntry;
int i;
int border = FREEGLUT_MENU_BORDER;
/*
* Have the menu box drawn first. The +- values are
* here just to make it more nice-looking...
*/
/* a non-black dark version of the below. */
glColor4f( 1.0f, 1.0f, 1.0f, 1.0f );
glBegin( GL_QUAD_STRIP );
glVertex2i( menu->Width , 0 );
glVertex2i( menu->Width - border, border);
glVertex2i( 0 , 0 );
glVertex2i( border, border);
glVertex2i( 0 , menu->Height );
glVertex2i( border, menu->Height - border);
glEnd( );
/* a non-black dark version of the below. */
glColor4f( 0.5f, 0.5f, 0.5f, 1.0f );
glBegin( GL_QUAD_STRIP );
glVertex2i( 0 , menu->Height );
glVertex2i( border, menu->Height - border);
glVertex2i( menu->Width , menu->Height );
glVertex2i( menu->Width - border, menu->Height - border);
glVertex2i( menu->Width , 0 );
glVertex2i( menu->Width - border, border);
glEnd( );
glColor4fv( menu_pen_back ) ;
glBegin( GL_QUADS );
glVertex2i( border, border);
glVertex2i( menu->Width - border, border);
glVertex2i( menu->Width - border, menu->Height - border);
glVertex2i( border, menu->Height - border);
glEnd( );
/*
* Check if any of the submenus is currently active...
*/
for( menuEntry = (SFG_MenuEntry *)menu->Entries.First;
menuEntry;
menuEntry = (SFG_MenuEntry *)menuEntry->Node.Next )
{
/*
* Has the menu been marked as active, maybe?
*/
if( menuEntry->IsActive )
{
/*
* That's truly right, and we need to have it highlighted.
* There is an assumption that mouse cursor didn't move
* since the last check of menu activity state:
*/
int menuID = menuEntry->Ordinal;
/*
* So have the highlight drawn...
*/
glColor4fv( menu_pen_hback );
glBegin( GL_QUADS );
glVertex2i( border,
(menuID + 0)*FREEGLUT_MENU_HEIGHT + border );
glVertex2i( menu->Width - border,
(menuID + 0)*FREEGLUT_MENU_HEIGHT + border );
glVertex2i( menu->Width - border,
(menuID + 1)*FREEGLUT_MENU_HEIGHT + border );
glVertex2i( border,
(menuID + 1)*FREEGLUT_MENU_HEIGHT + border );
glEnd( );
}
}
/*
* Print the menu entries now...
*/
glColor4fv( menu_pen_fore );
for( menuEntry = (SFG_MenuEntry *)menu->Entries.First, i = 0;
menuEntry;
menuEntry = (SFG_MenuEntry *)menuEntry->Node.Next, ++i )
{
/*
* If the menu entry is active, set the color to white
*/
if( menuEntry->IsActive )
glColor4fv( menu_pen_hfore );
/*
* Move the raster into position...
*/
/* Try to center the text - JCJ 31 July 2003*/
glRasterPos2i(
2 * border,
( i + 1 )*FREEGLUT_MENU_HEIGHT -
( int )( FREEGLUT_MENU_HEIGHT*0.3 - border )
);
/*
* Have the label drawn, character after character:
*/
glutBitmapString( FREEGLUT_MENU_FONT, menuEntry->Text);
/*
* If it's a submenu, draw a right arrow
*/
if( menuEntry->SubMenu )
{
int width = glutBitmapWidth( FREEGLUT_MENU_FONT, '_' );
int x_base = menu->Width - 2 - width;
int y_base = i*FREEGLUT_MENU_HEIGHT + border;
glBegin( GL_TRIANGLES );
glVertex2i( x_base, y_base + 2*border);
glVertex2i( menu->Width - 2, y_base +
( FREEGLUT_MENU_HEIGHT + border) / 2 );
glVertex2i( x_base, y_base + FREEGLUT_MENU_HEIGHT - border );
glEnd( );
}
/*
* If the menu entry is active, reset the color
*/
if( menuEntry->IsActive )
glColor4fv( menu_pen_fore );
}
/*
* Now we are ready to check if any of our children needs to be redrawn:
*/
for( menuEntry = ( SFG_MenuEntry * )menu->Entries.First;
menuEntry;
menuEntry = ( SFG_MenuEntry * )menuEntry->Node.Next )
{
/*
* Is that an active sub menu by any case?
*/
if( menuEntry->SubMenu && menuEntry->IsActive )
{
/*
* Yeah, indeed. Have it redrawn now:
*/
fgSetWindow( menuEntry->SubMenu->Window );
fghDisplayMenuBox( menuEntry->SubMenu );
fgSetWindow( menu->Window );
}
}
}
/*
* Private static function to set the parent window of a submenu and all
* of its submenus
*/
static void fghSetSubmenuParentWindow( SFG_Window *window, SFG_Menu *menu )
{
SFG_MenuEntry *menuEntry;
menu->ParentWindow = window;
for( menuEntry = ( SFG_MenuEntry * )menu->Entries.First;
menuEntry;
menuEntry = ( SFG_MenuEntry * )menuEntry->Node.Next )
if( menuEntry->SubMenu )
fghSetSubmenuParentWindow( window, menuEntry->SubMenu );
}
/*
* Displays the currently active menu for the current window
*/
void fgDisplayMenu( void )
{
SFG_Window* window = fgStructure.Window;
SFG_Menu* menu = NULL;
freeglut_assert_window;
/*
* Check if there is an active menu attached to this window...
*/
menu = window->ActiveMenu;
freeglut_return_if_fail( menu );
fgSetWindow( menu->Window );
glPushAttrib( GL_DEPTH_BUFFER_BIT | GL_TEXTURE_BIT | GL_LIGHTING_BIT |
GL_POLYGON_BIT );
glDisable( GL_DEPTH_TEST );
glDisable( GL_TEXTURE_2D );
glDisable( GL_LIGHTING );
glDisable( GL_CULL_FACE );
glMatrixMode( GL_PROJECTION );
glPushMatrix( );
glLoadIdentity( );
glOrtho(
0, glutGet( GLUT_WINDOW_WIDTH ),
glutGet( GLUT_WINDOW_HEIGHT ), 0,
-1, 1
);
glMatrixMode( GL_MODELVIEW );
glPushMatrix( );
glLoadIdentity( );
fghCheckMenuStatus( window, menu );
fghDisplayMenuBox( menu );
glPopAttrib( );
glMatrixMode( GL_PROJECTION );
glPopMatrix( );
glMatrixMode( GL_MODELVIEW );
glPopMatrix( );
glutSwapBuffers( );
fgSetWindow ( window );
}
/*
* Activates a menu pointed by the function argument
*/
void fgActivateMenu( SFG_Window* window, int button )
{
/*
* We'll be referencing this menu a lot, so remember its address:
*/
SFG_Menu* menu = window->Menu[ button ];
/*
* Mark the menu as active, so that it gets displayed:
*/
window->ActiveMenu = menu;
menu->IsActive = GL_TRUE;
fgState.ActiveMenus++;
/*
* Set up the initial menu position now:
*/
menu->X = window->State.MouseX + glutGet( GLUT_WINDOW_X );
menu->Y = window->State.MouseY + glutGet( GLUT_WINDOW_Y );
if( menu->X + menu->Width > glutGet ( GLUT_SCREEN_WIDTH ) )
menu->X -=menu->Width;
if( menu->Y + menu->Height > glutGet ( GLUT_SCREEN_HEIGHT ) )
menu->Y -=menu->Height;
fgSetWindow( menu->Window );
glutPositionWindow( menu->X, menu->Y );
glutReshapeWindow( menu->Width, menu->Height );
glutPopWindow( );
glutShowWindow( );
menu->Window->ActiveMenu = menu;
}
/*
* Check whether an active menu absorbs a mouse click
*/
GLboolean fgCheckActiveMenu ( SFG_Window *window, SFG_Menu *menu )
{
/*
* Near as I can tell, this is the active menu behaviour:
* - 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 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.
*/
return fghCheckMenuStatus( window, menu );
}
/*
* Function to check for menu entry selection on menu deactivation
*/
void fgExecuteMenuCallback( SFG_Menu* menu )
{
SFG_MenuEntry *menuEntry;
/*
* First of all check any of the active sub menus...
*/
for( menuEntry = (SFG_MenuEntry *)menu->Entries.First;
menuEntry;
menuEntry = (SFG_MenuEntry *)menuEntry->Node.Next)
{
if( menuEntry->IsActive )
{
if( menuEntry->SubMenu )
fgExecuteMenuCallback( menuEntry->SubMenu );
else
if( menu->Callback )
menu->Callback( menuEntry->ID );
return;
}
}
}
/*
* Deactivates a menu pointed by the function argument.
*/
void fgDeactivateMenu( SFG_Window *window )
{
SFG_Window *current_window = fgStructure.Window;
/*
* Check if there is an active menu attached to this window...
*/
SFG_Menu* menu = window->ActiveMenu;
SFG_MenuEntry *menuEntry;
/*
* Did we find an active window?
*/
freeglut_return_if_fail( menu );
/*
* Hide the present menu's window
*/
fgSetWindow( menu->Window );
glutHideWindow( );
/*
* Forget about having that menu active anymore, now:
*/
menu->Window->ActiveMenu = NULL;
menu->ParentWindow->ActiveMenu = NULL;
menu->IsActive = GL_FALSE;
fgState.ActiveMenus--;
/*
* Hide all submenu windows, and the root menu's window.
*/
for ( menuEntry = ( SFG_MenuEntry * )menu->Entries.First;
menuEntry;
menuEntry = ( SFG_MenuEntry * )menuEntry->Node.Next )
{
/*
* Is that an active submenu by any case?
*/
if( menuEntry->SubMenu )
fgDeactivateSubMenu( menuEntry );
}
fgSetWindow( current_window );
}
/*
* Deactivates a menu pointed by the function argument.
*/
void fgDeactivateSubMenu( SFG_MenuEntry *menuEntry )
{
SFG_Window *current_window = fgStructure.Window;
SFG_MenuEntry *subMenuIter;
/*
* Hide the present menu's window
*/
fgSetWindow( menuEntry->SubMenu->Window );
glutHideWindow( );
/*
* Forget about having that menu active anymore, now:
*/
menuEntry->SubMenu->Window->ActiveMenu = NULL;
menuEntry->SubMenu->IsActive = GL_FALSE;
/*
* Hide all submenu windows, and the root menu's window.
*/
for ( subMenuIter = (SFG_MenuEntry *)menuEntry->SubMenu->Entries.First;
subMenuIter;
subMenuIter = (SFG_MenuEntry *)subMenuIter->Node.Next )
{
/*
* Is that an active submenu by any case?
*/
if( subMenuIter->SubMenu )
fgDeactivateSubMenu( subMenuIter );
}
fgSetWindow( current_window );
}
/*
* Recalculates current menu's box size
*/
void fghCalculateMenuBoxSize( void )
{
SFG_MenuEntry* menuEntry;
int width = 0, height = 0;
/*
* Make sure there is a current menu set
*/
freeglut_assert_ready;
freeglut_return_if_fail( fgStructure.Menu );
/*
* The menu's box size depends on the menu entries:
*/
for( menuEntry = ( SFG_MenuEntry * )fgStructure.Menu->Entries.First;
menuEntry;
menuEntry = ( SFG_MenuEntry * )menuEntry->Node.Next )
{
/*
* Update the menu entry's width value
*/
menuEntry->Width = glutBitmapLength( FREEGLUT_MENU_FONT,
menuEntry->Text );
/*
* If the entry is a submenu, then it needs to be wider to
* accomodate the arrow. JCJ 31 July 2003
*/
if (menuEntry->SubMenu )
menuEntry->Width += glutBitmapLength( FREEGLUT_MENU_FONT, "_" );
/*
* Check if it's the biggest we've found
*/
if( menuEntry->Width > width )
width = menuEntry->Width;
height += FREEGLUT_MENU_HEIGHT;
}
/*
* Store the menu's box size now:
*/
fgStructure.Menu->Height = height + 2 * FREEGLUT_MENU_BORDER;
fgStructure.Menu->Width = width + 4 * FREEGLUT_MENU_BORDER;
}
/* -- INTERFACE FUNCTIONS -------------------------------------------------- */
/*
* Creates a new menu object, adding it to the freeglut structure
*/
int FGAPIENTRY glutCreateMenu( void(* callback)( int ) )
{
/*
* The menu object creation code resides in freeglut_structure.c
*/
return fgCreateMenu( callback )->ID;
}
/*
* Destroys a menu object, removing all references to it
*/
void FGAPIENTRY glutDestroyMenu( int menuID )
{
SFG_Menu* menu = fgMenuByID( menuID );
freeglut_assert_ready;
freeglut_return_if_fail( menu );
/*
* The menu object destruction code resides in freeglut_structure.c
*/
fgDestroyMenu( menu );
}
/*
* Returns the ID number of the currently active menu
*/
int FGAPIENTRY glutGetMenu( void )
{
freeglut_assert_ready;
if( fgStructure.Menu )
return fgStructure.Menu->ID;
return 0;
}
/*
* Sets the current menu given its menu ID
*/
void FGAPIENTRY glutSetMenu( int menuID )
{
SFG_Menu* menu = fgMenuByID( menuID );
freeglut_assert_ready;
freeglut_return_if_fail( menu );
fgStructure.Menu = menu;
}
/*
* Adds a menu entry to the bottom of the current menu
*/
void FGAPIENTRY glutAddMenuEntry( const char* label, int value )
{
SFG_MenuEntry* menuEntry =
(SFG_MenuEntry *)calloc( sizeof(SFG_MenuEntry), 1 );
freeglut_assert_ready;
freeglut_return_if_fail( fgStructure.Menu );
menuEntry->Text = strdup( label );
menuEntry->ID = value;
/*
* Have the new menu entry attached to the current menu
*/
fgListAppend( &fgStructure.Menu->Entries, &menuEntry->Node );
fghCalculateMenuBoxSize( );
}
/*
* Add a sub menu to the bottom of the current menu
*/
void FGAPIENTRY glutAddSubMenu( const char *label, int subMenuID )
{
SFG_MenuEntry *menuEntry =
( SFG_MenuEntry * )calloc( sizeof( SFG_MenuEntry ), 1 );
SFG_Menu *subMenu = fgMenuByID( subMenuID );
freeglut_assert_ready;
freeglut_return_if_fail( fgStructure.Menu );
freeglut_return_if_fail( subMenu );
menuEntry->Text = strdup( label );
menuEntry->SubMenu = subMenu;
menuEntry->ID = -1;
/*
* Make the submenu's parent window be the menu's parent window
*/
fghSetSubmenuParentWindow( fgStructure.Menu->ParentWindow, subMenu );
fgListAppend( &fgStructure.Menu->Entries, &menuEntry->Node );
fghCalculateMenuBoxSize( );
}
/*
* Changes the specified menu item in the current menu into a menu entry
*/
void FGAPIENTRY glutChangeToMenuEntry( int item, const char* label, int value )
{
SFG_MenuEntry* menuEntry = NULL;
freeglut_assert_ready;
freeglut_return_if_fail( fgStructure.Menu );
/*
* Get n-th menu entry in the current menu, starting from one:
*/
menuEntry = fghFindMenuEntry( fgStructure.Menu, item );
freeglut_return_if_fail( menuEntry );
/*
* We want it to become a normal menu entry, so:
*/
if( menuEntry->Text )
free( menuEntry->Text );
menuEntry->Text = strdup( label );
menuEntry->ID = value;
menuEntry->SubMenu = NULL;
fghCalculateMenuBoxSize( );
}
/*
* Changes the specified menu item in the current menu into a sub-menu trigger.
*/
void FGAPIENTRY glutChangeToSubMenu( int item, const char* label,
int subMenuID )
{
SFG_Menu* subMenu = fgMenuByID( subMenuID );
SFG_MenuEntry* menuEntry = NULL;
freeglut_assert_ready;
freeglut_return_if_fail( fgStructure.Menu );
freeglut_return_if_fail( subMenu );
/*
* Get n-th menu entry in the current menu, starting from one:
*/
menuEntry = fghFindMenuEntry( fgStructure.Menu, item );
freeglut_return_if_fail( menuEntry );
/*
* We want it to become a sub menu entry, so:
*/
if( menuEntry->Text )
free( menuEntry->Text );
menuEntry->Text = strdup( label );
menuEntry->SubMenu = subMenu;
menuEntry->ID = -1;
fghCalculateMenuBoxSize( );
}
/*
* Removes the specified menu item from the current menu
*/
void FGAPIENTRY glutRemoveMenuItem( int item )
{
SFG_MenuEntry* menuEntry;
freeglut_assert_ready;
freeglut_return_if_fail( fgStructure.Menu );
/*
* Get n-th menu entry in the current menu, starting from one:
*/
menuEntry = fghFindMenuEntry( fgStructure.Menu, item );
freeglut_return_if_fail( menuEntry );
fgListRemove( &fgStructure.Menu->Entries, &menuEntry->Node );
if ( menuEntry->Text )
free( menuEntry->Text );
free( menuEntry );
fghCalculateMenuBoxSize( );
}
/*
* Attaches a menu to the current window
*/
void FGAPIENTRY glutAttachMenu( int button )
{
freeglut_assert_ready;
freeglut_return_if_fail( fgStructure.Window );
freeglut_return_if_fail( fgStructure.Menu );
freeglut_return_if_fail( button >= 0 );
freeglut_return_if_fail( button < FREEGLUT_MAX_MENUS );
fgStructure.Window->Menu[ button ] = fgStructure.Menu;
/*
* Make the parent window of the menu (and all submenus) the current window
*/
fghSetSubmenuParentWindow( fgStructure.Window, fgStructure.Menu );
}
/*
* Detaches a menu from the current window
*/
void FGAPIENTRY glutDetachMenu( int button )
{
freeglut_assert_ready;
freeglut_return_if_fail( fgStructure.Window );
freeglut_return_if_fail( fgStructure.Menu );
freeglut_return_if_fail( button >= 0 );
freeglut_return_if_fail( button < FREEGLUT_MAX_MENUS );
fgStructure.Window->Menu[ button ] = NULL;
}
/*
* A.Donev: Set and retrieve the menu's user data
*/
void* FGAPIENTRY glutGetMenuData( void )
{
return fgStructure.Menu->UserData;
}
void FGAPIENTRY glutSetMenuData(void* data)
{
fgStructure.Menu->UserData=data;
}
/*** END OF FILE ***/
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