| /* |
| * 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. |
| */ |
| |
| #define FREEGLUT_BUILDING_LIB |
| #include <GL/freeglut.h> |
| #include "fg_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_MENUENTRY_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.) |
| */ |
| /* See platform-specific header files for menu font and color definitions */ |
| |
| #define FREEGLUT_MENUENTRY_HEIGHT(font) (glutBitmapHeight(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. |
| */ |
| static float menu_pen_fore [4] = FREEGLUT_MENU_PEN_FORE_COLORS ; |
| static float menu_pen_back [4] = FREEGLUT_MENU_PEN_BACK_COLORS ; |
| static float menu_pen_hfore [4] = FREEGLUT_MENU_PEN_HFORE_COLORS; |
| static float menu_pen_hback [4] = FREEGLUT_MENU_PEN_HBACK_COLORS; |
| |
| |
| extern GLvoid fgPlatformGetGameModeVMaxExtent( SFG_Window* window, int* x, int* y ); |
| extern void fghPlatformGetCursorPos(const SFG_Window *window, GLboolean client, SFG_XYUse *mouse_pos); |
| extern SFG_Font* fghFontByID( void* font ); |
| extern void fgPlatformHideWindow( SFG_Window* window ); |
| |
| /* -- 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; |
| } |
| |
| /* |
| * Deactivates a menu pointed by the function argument. |
| */ |
| static void fghDeactivateSubMenu( SFG_MenuEntry *menuEntry ) |
| { |
| SFG_MenuEntry *subMenuIter; |
| /* Hide the present menu's window */ |
| fgPlatformHideWindow( menuEntry->SubMenu->Window ); |
| |
| /* Forget about having that menu active anymore, now: */ |
| menuEntry->SubMenu->Window->ActiveMenu = NULL; |
| menuEntry->SubMenu->IsActive = GL_FALSE; |
| menuEntry->SubMenu->ActiveEntry = NULL; |
| |
| /* 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 ) |
| { |
| subMenuIter->IsActive = GL_FALSE; |
| |
| /* Is that an active submenu by any case? */ |
| if( subMenuIter->SubMenu ) |
| fghDeactivateSubMenu( subMenuIter ); |
| } |
| } |
| |
| /* |
| * Private function to get the virtual maximum screen extent |
| */ |
| static GLvoid fghGetVMaxExtent( SFG_Window* window, int* x, int* y ) |
| { |
| if( fgStructure.GameModeWindow ) |
| fgPlatformGetGameModeVMaxExtent ( window, x, y ); |
| else |
| { |
| *x = fgDisplay.ScreenWidth; |
| *y = fgDisplay.ScreenHeight; |
| } |
| } |
| |
| /* |
| * Private function to check for the current menu/sub menu activity state |
| */ |
| static GLboolean fghCheckMenuStatus( 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 GL_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; |
| |
| menuEntry->SubMenu->Window->State.MouseX = |
| menu->Window->State.MouseX + menu->X - menuEntry->SubMenu->X; |
| menuEntry->SubMenu->Window->State.MouseY = |
| menu->Window->State.MouseY + menu->Y - menuEntry->SubMenu->Y; |
| return_status = fghCheckMenuStatus( menuEntry->SubMenu ); |
| |
| if ( return_status ) |
| return GL_TRUE; |
| } |
| } |
| |
| /* That much about our sub menus, let's get to checking the current menu: */ |
| x = menu->Window->State.MouseX; |
| y = menu->Window->State.MouseY; |
| |
| /* 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 ) ) |
| { |
| int menuID = ( y - FREEGLUT_MENU_BORDER ) / FREEGLUT_MENUENTRY_HEIGHT(menu->Font); |
| |
| /* The mouse cursor is somewhere over our box, check it out. */ |
| menuEntry = fghFindMenuEntry( menu, menuID + 1 ); |
| FREEGLUT_INTERNAL_ERROR_EXIT( menuEntry, "Cannot find menu entry", |
| "fghCheckMenuStatus" ); |
| |
| 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 ) |
| fghDeactivateSubMenu( menu->ActiveEntry ); |
| |
| if( menuEntry != menu->ActiveEntry ) |
| { |
| menu->Window->State.WorkMask |= GLUT_DISPLAY_WORK; |
| if( menu->ActiveEntry ) |
| menu->ActiveEntry->IsActive = GL_FALSE; |
| } |
| |
| menu->ActiveEntry = menuEntry; |
| menu->IsActive = GL_TRUE; |
| |
| /* |
| * OK, 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 ) |
| { |
| int max_x, max_y; |
| SFG_Window *current_window = fgStructure.CurrentWindow; |
| |
| /* Set up the initial menu position now... */ |
| menuEntry->SubMenu->IsActive = GL_TRUE; |
| |
| /* Set up the initial submenu position now: */ |
| fghGetVMaxExtent(menu->ParentWindow, &max_x, &max_y); |
| menuEntry->SubMenu->X = menu->X + menu->Width; |
| menuEntry->SubMenu->Y = menu->Y + |
| menuEntry->Ordinal * FREEGLUT_MENUENTRY_HEIGHT(menu->Font); |
| |
| if( menuEntry->SubMenu->X + menuEntry->SubMenu->Width > max_x ) |
| menuEntry->SubMenu->X = menu->X - menuEntry->SubMenu->Width; |
| |
| if( menuEntry->SubMenu->Y + menuEntry->SubMenu->Height > max_y ) |
| { |
| menuEntry->SubMenu->Y -= ( menuEntry->SubMenu->Height - |
| FREEGLUT_MENUENTRY_HEIGHT(menu->Font) - |
| 2 * FREEGLUT_MENU_BORDER ); |
| if( menuEntry->SubMenu->Y < 0 ) |
| menuEntry->SubMenu->Y = 0; |
| } |
| |
| 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 ); |
| menuEntry->SubMenu->Window->State.MouseX = |
| x + menu->X - menuEntry->SubMenu->X; |
| menuEntry->SubMenu->Window->State.MouseY = |
| y + menu->Y - menuEntry->SubMenu->Y; |
| fghCheckMenuStatus( 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... */ |
| if( menu->ActiveEntry && menu->ActiveEntry->IsActive && |
| ( !menu->ActiveEntry->SubMenu || |
| !menu->ActiveEntry->SubMenu->IsActive ) ) |
| { |
| menu->Window->State.WorkMask |= GLUT_DISPLAY_WORK; |
| menu->ActiveEntry->IsActive = GL_FALSE; |
| menu->ActiveEntry = NULL; |
| } |
| |
| 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_MENUENTRY_HEIGHT(menu->Font) + border ); |
| glVertex2i( menu->Width - border, |
| (menuID + 0)*FREEGLUT_MENUENTRY_HEIGHT(menu->Font) + border ); |
| glVertex2i( menu->Width - border, |
| (menuID + 1)*FREEGLUT_MENUENTRY_HEIGHT(menu->Font) + border ); |
| glVertex2i( border, |
| (menuID + 1)*FREEGLUT_MENUENTRY_HEIGHT(menu->Font) + 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_MENUENTRY_HEIGHT(menu->Font) - |
| ( int )( FREEGLUT_MENUENTRY_HEIGHT(menu->Font)*0.3 - border ) |
| ); |
| |
| /* Have the label drawn, character after character: */ |
| glutBitmapString( menu->Font, |
| (unsigned char *)menuEntry->Text); |
| |
| /* If it's a submenu, draw a right arrow */ |
| if( menuEntry->SubMenu ) |
| { |
| int width = glutBitmapWidth( menu->Font, '_' ); |
| int x_base = menu->Width - 2 - width; |
| int y_base = i*FREEGLUT_MENUENTRY_HEIGHT(menu->Font) + border; |
| glBegin( GL_TRIANGLES ); |
| glVertex2i( x_base, y_base + 2*border); |
| glVertex2i( menu->Width - 2, y_base + |
| ( FREEGLUT_MENUENTRY_HEIGHT(menu->Font) + border) / 2 ); |
| glVertex2i( x_base, y_base + FREEGLUT_MENUENTRY_HEIGHT(menu->Font) - border ); |
| glEnd( ); |
| } |
| |
| /* If the menu entry is active, reset the color */ |
| if( menuEntry->IsActive ) |
| glColor4fv( menu_pen_fore ); |
| } |
| } |
| |
| /* |
| * Private static function to set the parent window of a submenu and all |
| * of its submenus. |
| */ |
| static void fghSetMenuParentWindow( 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 ) |
| fghSetMenuParentWindow( window, menuEntry->SubMenu ); |
| } |
| |
| |
| /* |
| * Displays the currently active menu for the current window |
| */ |
| void fgDisplayMenu( void ) |
| { |
| SFG_Window* window = fgStructure.CurrentWindow; |
| SFG_Menu* menu = NULL; |
| |
| FREEGLUT_INTERNAL_ERROR_EXIT ( fgStructure.CurrentWindow, "Displaying menu in nonexistent window", |
| "fgDisplayMenu" ); |
| |
| /* 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( ); |
| |
| fghDisplayMenuBox( menu ); |
| |
| glPopAttrib( ); |
| |
| glMatrixMode( GL_PROJECTION ); |
| glPopMatrix( ); |
| glMatrixMode( GL_MODELVIEW ); |
| glPopMatrix( ); |
| |
| glutSwapBuffers( ); |
| |
| fgSetWindow ( window ); |
| } |
| |
| /* |
| * 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 |
| */ |
| fghPlatformGetCursorPos(NULL, GL_FALSE, &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 ); |
| } |
| |
| /* |
| * Update Highlight states of the menu |
| * NB: Current mouse position is in menu->Window->State.MouseX/Y |
| */ |
| void fgUpdateMenuHighlight ( SFG_Menu *menu ) |
| { |
| fghCheckMenuStatus( menu ); |
| } |
| |
| /* |
| * 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; |
| } |
| |
| /* |
| * Deactivates a menu pointed by the function argument. |
| */ |
| static SFG_Menu* menuDeactivating = NULL; |
| void fgDeactivateMenu( SFG_Window *window ) |
| { |
| SFG_Window *parent_window = NULL; |
| SFG_Menu* menu; |
| SFG_MenuEntry *menuEntry; |
| |
| /* Did we find an active window? */ |
| freeglut_return_if_fail( window ); |
| /* Check if there is an active menu attached to this window... */ |
| menu = window->ActiveMenu; |
| freeglut_return_if_fail( menu ); |
| /* Check if we are already deactivating this menu, abort in that case (glutHideWindow below can cause this function to be called again on the same menu..) */ |
| if (menu==menuDeactivating) |
| return; |
| menuDeactivating = menu; |
| |
| parent_window = menu->ParentWindow; |
| |
| /* Hide the present menu's window */ |
| fgPlatformHideWindow( menu->Window ); |
| |
| /* Forget about having that menu active anymore, now: */ |
| menu->Window->ActiveMenu = NULL; |
| menu->ParentWindow->ActiveMenu = NULL; |
| fghSetMenuParentWindow ( NULL, menu ); |
| menu->IsActive = GL_FALSE; |
| menu->ActiveEntry = NULL; |
| |
| 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 ) |
| { |
| menuEntry->IsActive = GL_FALSE; |
| |
| /* Is that an active submenu by any chance? */ |
| if( menuEntry->SubMenu ) |
| fghDeactivateSubMenu( menuEntry ); |
| } |
| /* Done deactivating menu */ |
| menuDeactivating = NULL; |
| |
| /* Menu status callback */ |
| if (fgState.MenuStateCallback || fgState.MenuStatusCallback) |
| { |
| fgStructure.CurrentMenu = menu; |
| fgStructure.CurrentWindow = parent_window; |
| if (fgState.MenuStateCallback) |
| fgState.MenuStateCallback(GLUT_MENU_NOT_IN_USE); |
| if (fgState.MenuStatusCallback) |
| { |
| /* Get cursor position relative to parent_window's client area */ |
| SFG_XYUse mouse_pos; |
| fghPlatformGetCursorPos(parent_window, GL_TRUE, &mouse_pos); |
| |
| fgState.MenuStatusCallback(GLUT_MENU_NOT_IN_USE, mouse_pos.X, mouse_pos.Y); |
| } |
| } |
| } |
| |
| /* |
| * 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_return_if_fail( fgStructure.CurrentMenu ); |
| |
| /* The menu's box size depends on the menu entries: */ |
| for( menuEntry = ( SFG_MenuEntry * )fgStructure.CurrentMenu->Entries.First; |
| menuEntry; |
| menuEntry = ( SFG_MenuEntry * )menuEntry->Node.Next ) |
| { |
| /* Update the menu entry's width value */ |
| menuEntry->Width = glutBitmapLength( |
| fgStructure.CurrentMenu->Font, |
| (unsigned char *)menuEntry->Text |
| ); |
| |
| /* |
| * If the entry is a submenu, then it needs to be wider to |
| * accommodate the arrow. |
| */ |
| if (menuEntry->SubMenu) |
| menuEntry->Width += glutBitmapLength( |
| fgStructure.CurrentMenu->Font, |
| (unsigned char *)"_" |
| ); |
| |
| /* Check if it's the biggest we've found */ |
| if( menuEntry->Width > width ) |
| width = menuEntry->Width; |
| |
| height += FREEGLUT_MENUENTRY_HEIGHT(fgStructure.CurrentMenu->Font); |
| } |
| |
| /* Store the menu's box size now: */ |
| fgStructure.CurrentMenu->Height = height + 2 * FREEGLUT_MENU_BORDER; |
| fgStructure.CurrentMenu->Width = width + 4 * FREEGLUT_MENU_BORDER; |
| } |
| |
| |
| /* -- INTERFACE FUNCTIONS -------------------------------------------------- */ |
| |
| /* |
| * Creates a new menu object, adding it to the freeglut structure |
| */ |
| int FGAPIENTRY glutCreateMenu( FGCBMenu callback ) |
| { |
| /* The menu object creation code resides in freeglut_structure.c */ |
| FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutCreateMenu" ); |
| if (fgState.ActiveMenus) |
| fgError("Menu manipulation not allowed while menus in use."); |
| |
| return fgCreateMenu( callback )->ID; |
| } |
| |
| /* |
| * Destroys a menu object, removing all references to it |
| */ |
| void FGAPIENTRY glutDestroyMenu( int menuID ) |
| { |
| SFG_Menu* menu; |
| |
| FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutDestroyMenu" ); |
| menu = fgMenuByID( menuID ); |
| |
| freeglut_return_if_fail( menu ); |
| if (fgState.ActiveMenus) |
| fgError("Menu manipulation not allowed while menus in use."); |
| |
| /* 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_EXIT_IF_NOT_INITIALISED ( "glutGetMenu" ); |
| |
| if( fgStructure.CurrentMenu ) |
| return fgStructure.CurrentMenu->ID; |
| |
| return 0; |
| } |
| |
| /* |
| * Sets the current menu given its menu ID |
| */ |
| void FGAPIENTRY glutSetMenu( int menuID ) |
| { |
| SFG_Menu* menu; |
| |
| FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSetMenu" ); |
| menu = fgMenuByID( menuID ); |
| |
| freeglut_return_if_fail( menu ); |
| |
| fgStructure.CurrentMenu = menu; |
| } |
| |
| /* |
| * Adds a menu entry to the bottom of the current menu |
| */ |
| void FGAPIENTRY glutAddMenuEntry( const char* label, int value ) |
| { |
| SFG_MenuEntry* menuEntry; |
| FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutAddMenuEntry" ); |
| menuEntry = (SFG_MenuEntry *)calloc( sizeof(SFG_MenuEntry), 1 ); |
| |
| freeglut_return_if_fail( fgStructure.CurrentMenu ); |
| if (fgState.ActiveMenus) |
| fgError("Menu manipulation not allowed while menus in use."); |
| |
| menuEntry->Text = strdup( label ); |
| menuEntry->ID = value; |
| |
| /* Have the new menu entry attached to the current menu */ |
| fgListAppend( &fgStructure.CurrentMenu->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_Menu *subMenu; |
| |
| FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutAddSubMenu" ); |
| menuEntry = ( SFG_MenuEntry * )calloc( sizeof( SFG_MenuEntry ), 1 ); |
| subMenu = fgMenuByID( subMenuID ); |
| |
| freeglut_return_if_fail( fgStructure.CurrentMenu ); |
| if (fgState.ActiveMenus) |
| fgError("Menu manipulation not allowed while menus in use."); |
| |
| freeglut_return_if_fail( subMenu ); |
| |
| menuEntry->Text = strdup( label ); |
| menuEntry->SubMenu = subMenu; |
| menuEntry->ID = -1; |
| |
| fgListAppend( &fgStructure.CurrentMenu->Entries, &menuEntry->Node ); |
| fghCalculateMenuBoxSize( ); |
| } |
| |
| /* |
| * Changes the current menu's font |
| */ |
| void FGAPIENTRY glutSetMenuFont( int menuID, void* fontID ) |
| { |
| SFG_Font* font; |
| SFG_Menu* menu; |
| FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSetMenuFont" ); |
| menu = fgMenuByID( menuID ); |
| freeglut_return_if_fail( menu ); |
| |
| if (fgState.ActiveMenus) |
| fgError("Menu manipulation not allowed while menus in use."); |
| |
| font = fghFontByID( fontID ); |
| if (!font) |
| { |
| fgWarning("glutChangeMenuFont: bitmap font 0x%08x not found. Make sure you're not passing a stroke font. Ignoring...\n",fontID); |
| return; |
| } |
| |
| fgStructure.CurrentMenu->Font = fontID; |
| 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_EXIT_IF_NOT_INITIALISED ( "glutChangeToMenuEntry" ); |
| |
| freeglut_return_if_fail( fgStructure.CurrentMenu ); |
| if (fgState.ActiveMenus) |
| fgError("Menu manipulation not allowed while menus in use."); |
| |
| /* Get n-th menu entry in the current menu, starting from one: */ |
| menuEntry = fghFindMenuEntry( fgStructure.CurrentMenu, 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; |
| SFG_MenuEntry* menuEntry; |
| |
| FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutChangeToSubMenu" ); |
| |
| freeglut_return_if_fail( fgStructure.CurrentMenu ); |
| if (fgState.ActiveMenus) |
| fgError("Menu manipulation not allowed while menus in use."); |
| |
| /* Get handle to sub menu */ |
| subMenu = fgMenuByID( subMenuID ); |
| menuEntry = NULL; |
| freeglut_return_if_fail( subMenu ); |
| |
| /* Get n-th menu entry in the current menu, starting from one: */ |
| menuEntry = fghFindMenuEntry( fgStructure.CurrentMenu, 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_EXIT_IF_NOT_INITIALISED ( "glutRemoveMenuItem" ); |
| |
| freeglut_return_if_fail( fgStructure.CurrentMenu ); |
| if (fgState.ActiveMenus) |
| fgError("Menu manipulation not allowed while menus in use."); |
| |
| /* Get n-th menu entry in the current menu, starting from one: */ |
| menuEntry = fghFindMenuEntry( fgStructure.CurrentMenu, item ); |
| |
| freeglut_return_if_fail( menuEntry ); |
| |
| fgListRemove( &fgStructure.CurrentMenu->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_EXIT_IF_NOT_INITIALISED ( "glutAttachMenu" ); |
| |
| freeglut_return_if_fail( fgStructure.CurrentWindow ); |
| |
| freeglut_return_if_fail( fgStructure.CurrentMenu ); |
| if (fgState.ActiveMenus) |
| fgError("Menu manipulation not allowed while menus in use."); |
| |
| freeglut_return_if_fail( button >= 0 ); |
| freeglut_return_if_fail( button < FREEGLUT_MAX_MENUS ); |
| |
| fgStructure.CurrentWindow->Menu[ button ] = fgStructure.CurrentMenu; |
| } |
| |
| /* |
| * Detaches a menu from the current window |
| */ |
| void FGAPIENTRY glutDetachMenu( int button ) |
| { |
| FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutDetachMenu" ); |
| |
| freeglut_return_if_fail( fgStructure.CurrentWindow ); |
| |
| freeglut_return_if_fail( fgStructure.CurrentMenu ); |
| if (fgState.ActiveMenus) |
| fgError("Menu manipulation not allowed while menus in use."); |
| |
| freeglut_return_if_fail( button >= 0 ); |
| freeglut_return_if_fail( button < FREEGLUT_MAX_MENUS ); |
| |
| fgStructure.CurrentWindow->Menu[ button ] = NULL; |
| } |
| |
| /* |
| * A.Donev: Set and retrieve the menu's user data |
| */ |
| void* FGAPIENTRY glutGetMenuData( void ) |
| { |
| FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutGetMenuData" ); |
| return fgStructure.CurrentMenu->UserData; |
| } |
| |
| void FGAPIENTRY glutSetMenuData(void* data) |
| { |
| FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSetMenuData" ); |
| fgStructure.CurrentMenu->UserData=data; |
| } |
| |
| /*** END OF FILE ***/ |
