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Several updates from John and myself.

Browse Source 
The broad outlines are:

 * Color schemes are now in variables, are closer to old GLUT, and
   are system dependant (as old GLUT did).
 * You can change the font to any bitmapped font more easily, which
   can aid in finding a better approximation.  (Old GLUT does not seem
   to have used a GLUT font for the menus, which causes problems for
   us.)  The menus rescale automatically, including the triangle "arrow"
   for sub-menus.
 * Menus have real borders, and the placement of highlighting is
   much improved.


git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@215 7f0cb862-5218-0410-a997-914c9d46530a
This commit is contained in:
rkrolib 2003-10-08 16:04:58 +00:00
parent de5aadf9b5
commit 5a3594b831
1 changed files with 84 additions and 46 deletions
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130
freeglut/freeglut/src/freeglut_menu.c
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@ -47,9 +47,30 @@
/* /*
* We'll be using freeglut fonts to draw the menu * We'll be using freeglut fonts to draw the menu
*/ */
#define FREEGLUT_MENU_FONT GLUT_BITMAP_8_BY_13 #define FREEGLUT_MENU_FONT GLUT_BITMAP_8_BY_13
#define FREEGLUT_MENU_HEIGHT 15 /*#define FREEGLUT_MENU_FONT GLUT_BITMAP_HELVETICA_18*/
#define FREEGLUT_MENU_BORDER 8 #define FREEGLUT_MENU_HEIGHT (glutBitmapHeight(FREEGLUT_MENU_FONT) + FREEGLUT_MENU_BORDER)
#define FREEGLUT_MENU_BORDER 2
/*
* These variables should be moved into the freeglut global state, but for now,
* we'll put them here. They 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] = {0.0f, 0.0f, 0.0f, 1.0f};
static float menu_pen_back [4] = {0.85f, 0.85f, 0.85f, 1.0f};
#if TARGET_HOST_WIN32
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_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 FUNCTIONS ---------------------------------------------------- */
@ -129,12 +150,14 @@ static GLboolean fghCheckMenuStatus( SFG_Window* window, SFG_Menu* menu )
/* /*
* Check if the mouse cursor is contained within the current menu box * Check if the mouse cursor is contained within the current menu box
*/ */
if ( ( x >= 0 ) && ( x < menu->Width ) && ( y >= 0 ) && ( y < menu->Height ) && ( window == menu->Window ) ) if ( ( x >= FREEGLUT_MENU_BORDER ) && ( x < menu->Width - FREEGLUT_MENU_BORDER ) &&
( y >= FREEGLUT_MENU_BORDER ) && ( y < menu->Height - FREEGLUT_MENU_BORDER ) &&
( window == menu->Window ) )
{ {
/* /*
* Calculation of the highlighted menu item is easy enough now: * Calculation of the highlighted menu item is easy enough now:
*/ */
int menuID = y / FREEGLUT_MENU_HEIGHT; int menuID = ( y - FREEGLUT_MENU_BORDER ) / FREEGLUT_MENU_HEIGHT ;
/* /*
* The mouse cursor is somewhere over our box, check it out. * The mouse cursor is somewhere over our box, check it out.
@ -231,25 +254,38 @@ static void fghDisplayMenuBox( SFG_Menu* menu )
{ {
SFG_MenuEntry *menuEntry; SFG_MenuEntry *menuEntry;
int i; int i;
int border = FREEGLUT_MENU_BORDER ;
/* /*
* Have the menu box drawn first. The +- values are * Have the menu box drawn first. The +- values are
* here just to make it more nice-looking... * here just to make it more nice-looking...
*/ */
glColor4f( 0.1289f, 0.2257f, 0.28516f, 1.0f ); /* a non-black dark version of the below. */ glColor4f( 1.0f, 1.0f, 1.0f, 1.0f ); /* a non-black dark version of the below. */
glBegin( GL_QUADS ); glBegin( GL_QUAD_STRIP );
glVertex2i( 0 , 0 ); glVertex2i( menu->Width , 0 );
glVertex2i( menu->Width, 0 ); glVertex2i( menu->Width-border, border);
glVertex2i( menu->Width, menu->Height ); glVertex2i( 0 , 0 );
glVertex2i( 0 , menu->Height ); glVertex2i( border, border);
glVertex2i( 0 , menu->Height );
glVertex2i( border, menu->Height-border);
glEnd(); glEnd();
glColor4f( 0.3f, 0.4f, 0.5f, 1.0f ); glColor4f( 0.5f, 0.5f, 0.5f, 1.0f ); /* a non-black dark version of the below. */
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 ); glBegin( GL_QUADS );
glVertex2i( 1, 1 ); glVertex2i( border, border);
glVertex2i( menu->Width-1, 1 ); glVertex2i( menu->Width-border, border);
glVertex2i( menu->Width-1, menu->Height-1); glVertex2i( menu->Width-border, menu->Height-border);
glVertex2i( 1, menu->Height-1); glVertex2i( border, menu->Height-border);
glEnd(); glEnd();
/* /*
@ -273,12 +309,12 @@ static void fghDisplayMenuBox( SFG_Menu* menu )
/* /*
* So have the highlight drawn... * So have the highlight drawn...
*/ */
glColor4f( 0.2f, 0.3f, 0.4f, 1.0f ); glColor4fv ( menu_pen_hback ) ;
glBegin( GL_QUADS ); glBegin( GL_QUADS );
glVertex2i( 2 , (menuID + 0)*FREEGLUT_MENU_HEIGHT + 1 ); glVertex2i( FREEGLUT_MENU_BORDER, (menuID + 0)*FREEGLUT_MENU_HEIGHT + FREEGLUT_MENU_BORDER );
glVertex2i( menu->Width-2, (menuID + 0)*FREEGLUT_MENU_HEIGHT + 1 ); glVertex2i( menu->Width-FREEGLUT_MENU_BORDER, (menuID + 0)*FREEGLUT_MENU_HEIGHT + FREEGLUT_MENU_BORDER );
glVertex2i( menu->Width-2, (menuID + 1)*FREEGLUT_MENU_HEIGHT + 2 ); glVertex2i( menu->Width-FREEGLUT_MENU_BORDER, (menuID + 1)*FREEGLUT_MENU_HEIGHT + FREEGLUT_MENU_BORDER );
glVertex2i( 2 , (menuID + 1)*FREEGLUT_MENU_HEIGHT + 2 ); glVertex2i( FREEGLUT_MENU_BORDER, (menuID + 1)*FREEGLUT_MENU_HEIGHT + FREEGLUT_MENU_BORDER );
glEnd(); glEnd();
} }
} }
@ -286,17 +322,24 @@ static void fghDisplayMenuBox( SFG_Menu* menu )
/* /*
* Print the menu entries now... * Print the menu entries now...
*/ */
glColor4f( 1, 1, 1, 1 );
glColor4fv ( menu_pen_fore );
for( menuEntry = (SFG_MenuEntry *)menu->Entries.First, i=0; menuEntry; for( menuEntry = (SFG_MenuEntry *)menu->Entries.First, i=0; menuEntry;
menuEntry = (SFG_MenuEntry *)menuEntry->Node.Next, ++i ) 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... * Move the raster into position...
*/ */
glRasterPos2i( glRasterPos2i(
FREEGLUT_MENU_BORDER, 2 * FREEGLUT_MENU_BORDER,
(i + 1)*FREEGLUT_MENU_HEIGHT-(int)(FREEGLUT_MENU_HEIGHT*0.3) /* Try to center the text - JCJ 31 July 2003*/ (i + 1)*FREEGLUT_MENU_HEIGHT-(int)(FREEGLUT_MENU_HEIGHT*0.3 - FREEGLUT_MENU_BORDER ) /* Try to center the text - JCJ 31 July 2003*/
); );
/* /*
@ -309,26 +352,21 @@ static void fghDisplayMenuBox( SFG_Menu* menu )
*/ */
if ( menuEntry->SubMenu != NULL ) if ( menuEntry->SubMenu != NULL )
{ {
GLubyte arrow_char [] = { 0, 0, 32, 48, 56, 60, 62, 63, 62, 60, 56, 48, 32, 0, 0 } ; int width = glutBitmapWidth ( FREEGLUT_MENU_FONT, '_' ) ;
int width = glutBitmapWidth ( FREEGLUT_MENU_FONT, ' ' ) ; int x_base = menu->Width - 2 - width;
int y_base = i*FREEGLUT_MENU_HEIGHT + FREEGLUT_MENU_BORDER;
glPushClientAttrib( GL_CLIENT_PIXEL_STORE_BIT ); glBegin( GL_TRIANGLES );
glVertex2i( x_base, y_base + 2*FREEGLUT_MENU_BORDER);
/* glVertex2i( menu->Width - 2, y_base + (FREEGLUT_MENU_HEIGHT + FREEGLUT_MENU_BORDER) / 2 );
* Set up the pixel unpacking ways glVertex2i( x_base, y_base + FREEGLUT_MENU_HEIGHT - FREEGLUT_MENU_BORDER);
*/ glEnd( );
glPixelStorei( GL_UNPACK_SWAP_BYTES, GL_FALSE );
glPixelStorei( GL_UNPACK_LSB_FIRST, GL_FALSE );
glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 );
glPixelStorei( GL_UNPACK_SKIP_ROWS, 0 );
glPixelStorei( GL_UNPACK_SKIP_PIXELS, 0 );
glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
glRasterPos2i ( menu->Width - 2 - width,
(i + 1)*FREEGLUT_MENU_HEIGHT - 1) ;
glBitmap ( width, FREEGLUT_MENU_HEIGHT, 0, 0, 0.0, 0.0, arrow_char ) ;
glPopClientAttrib();
} }
/*
* If the menu entry is active, reset the color
*/
if ( menuEntry->IsActive )
glColor4fv ( menu_pen_fore ) ;
} }
/* /*
@ -661,7 +699,7 @@ void fghCalculateMenuBoxSize( void )
*/ */
if (menuEntry->SubMenu != NULL) if (menuEntry->SubMenu != NULL)
menuEntry->Width += glutBitmapLength( FREEGLUT_MENU_FONT, " " ); menuEntry->Width += glutBitmapLength( FREEGLUT_MENU_FONT, "_" );
/* /*
* Check if it's the biggest we've found * Check if it's the biggest we've found
@ -675,8 +713,8 @@ void fghCalculateMenuBoxSize( void )
/* /*
* Store the menu's box size now: * Store the menu's box size now:
*/ */
fgStructure.Menu->Height = height; fgStructure.Menu->Height = height + 2 * FREEGLUT_MENU_BORDER ;
fgStructure.Menu->Width = width + 2 * FREEGLUT_MENU_BORDER ; fgStructure.Menu->Width = width + 4 * FREEGLUT_MENU_BORDER ;
} }