Re: GtkStyle in CList...

[Angelo Cano <acano systec com>]

On Tue, Oct 10, 2000 at 11:35:48AM -0700, James K. Wiggs wrote:
> 
>  Folks,
> 
>    I'm trying to change the background colors in a CList widget, and
> I don't seem to be having a lot of luck with it.  I want to color the
> text white by default, and alternating rows in the CList either black
> or 25% grey.  Certain cells may have the text colored bright green,
> bright red, gold, or a light purple.  I have the following code that
> is called during the application's initialization phase to create a
> global array of styles for this purpose:
> 
> gint Create_CList_Styles()
>     {
>     gint n;
>     GtkStyle *style;
>     GdkColormap *cmap;
>     GdkColor black,darkgrey,lightgrey,white;
>     GdkColor brightred,brightgreen;
>     GdkColor darkred,darkgreen;
>     GdkColor purple,gold;
>    
>     cmap = gdk_colormap_get_system();
>    
>     gdk_color_parse( "ffffff", &white);

try:
      gdk_color_parse( "white", &white );

>     gdk_colormap_alloc_color( cmap, &white, FALSE, TRUE );
>    
>     gdk_color_parse( "000000", &black );
      
      gdk_color_parse( "black", &black );

>     gdk_colormap_alloc_color( cmap, &black, FALSE, TRUE );
>    
>     gdk_color_parse( "404040", &darkgrey );

      gdk_color_parse( "darkgrey", &darkgrey );

>     gdk_colormap_alloc_color( cmap, &darkgrey, FALSE, TRUE );
> 
> ...
> 
>     /* The default (black) display style. */
> 
>     MMStyle[BLACK_WHITE_DISPLAY_STYLE] = 
> 	gtk_style_copy( gtk_widget_get_default_style() );
>     (MMStyle[BLACK_WHITE_DISPLAY_STYLE])->bg[GTK_STATE_NORMAL] = black;
     
      (MMStyle[BLACK_WHITE_DISPLAY_STYLE])->base[GTK_STATE_NORMAL] = black;

Sometimes when you want to change a widget's "background" color you need
to use "base" instead.

>     (MMStyle[BLACK_WHITE_DISPLAY_STYLE])->fg[GTK_STATE_NORMAL] = white;
>     (MMStyle[BLACK_WHITE_DISPLAY_STYLE])->text[GTK_STATE_NORMAL] = white;
> 
>     /* The default (grey) display style. */
> 
>     MMStyle[GREY_WHITE_DISPLAY_STYLE] =
> 	gtk_style_copy( gtk_widget_get_default_style() );
>     (MMStyle[GREY_WHITE_DISPLAY_STYLE])->bg[GTK_STATE_NORMAL] = darkgrey;
>     (MMStyle[GREY_WHITE_DISPLAY_STYLE])->fg[GTK_STATE_NORMAL] = white;
>     (MMStyle[GREY_WHITE_DISPLAY_STYLE])->text[GTK_STATE_NORMAL] = white;
> 
> ...
> 
>     return(0);
>     }
> 
>    So that's how I'm creating the styles.  Then the styles get used
> in this fashion (at this point in the code, the CList has already
> been created and filled in):
> 
>     for(i=0; i<MM->nsymbols; i++) {
> 
>         if( i%2 ) {
>             gtk_clist_set_row_style( clist, i,
> 		MMStyle[GREY_WHITE_DISPLAY_STYLE] );
>             }
>         else {
>             gtk_clist_set_row_style( clist, i,
> 		MMStyle[BLACK_WHITE_DISPLAY_STYLE] );
>             }
> 
>         for(j=0; j<MM->nfields; j++) {
>             /* Here is where we do the text coloring stuff. */
> 
>             if( MM->field[j] == CHANGE_FIELD ) {
>                 if( i%2 ) {
>                     gtk_clist_set_cell_style( clist, i, j,
> 			MMStyle[BLACK_GREEN_DISPLAY_STYLE] );
>                     }
>                 else {
>                     gtk_clist_set_cell_style( clist, i, j,
> 			MMStyle[GREY_GREEN_DISPLAY_STYLE] );
>                     }
>                 }
>             else if( MM->field[j] == SYMBOL_FIELD ) {
>                 if( i%2 ) {
>                     gtk_clist_set_cell_style( clist, i, j,
> 			MMStyle[BLACK_PURPLE_DISPLAY_STYLE] );
>                     }
>                 else {
>                     gtk_clist_set_cell_style( clist, i, j,
> 			MMStyle[GREY_PURPLE_DISPLAY_STYLE] );
>                     }
>                 }
>             }
>         }
> 
> 
>    The code *does* have some effect.  It appears to change the text
> color, but not to the color it *should* be changed to.  Instead of
> black, it is a dark blue.  The background remains white.  So, any
> suggestions as to what's wrong here?
> 
> thanks,
> Jim Wiggs
> wiggs@wiggs.net
> 
> 
> _______________________________________________
> gtk-app-devel-list mailing list
> gtk-app-devel-list@gnome.org
> http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list