/*
* 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 );
}
/*
* 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" );
if (!window) return;
/* 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 );
}
/*
* 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,
(unsigned char *)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 );
}
}
}
