> The color I want to change is the color of the text...(i-e FL_BLACK) I
> tried to use fl_set_foreground_color(gc,FL_WHITE) to change it, but the
> only result i get is a segmentation fault...
Ooops. I was incorrect in my previous suggestion. FL_COL1 is not the
text color, it is the label color. This will teach me to try to read
mail during long compiles and not test my solutions. My most humble
apologies for a misleading reply.
My basic suggestion, using fl_mapcolor() was on the right track, but
beyond there, I should have kept my mouth shut.
What you want to do is to specify your own label color, then use
fl_mapcolor() to change it.
That should be the end of it but, unfortunately, it's not. I'm not
sure why -- TC, maybe you can help us here -- but it seems that unless
you do some other jiggery pokery, the label color does not get changed
in the displayed form. It seems that XForms will not recognize the
colormap change until you change the an object's color to something
*other* than what it is supposed to be, then change it again to the
correct label color:
int red;
int green;
int blue;
/* Fetch the color -- arbitrarily from the object's col1 */
fl_getmcolor( ob->col1, &red, &green, &blue );
/* Change it. */
fl_mapcolor( MY_LABEL, red, green, blue );
/* This part here is a hack -- I don't see why one should have todo it */
fl_set_object_lcolor( ob, FL_RED );
fl_set_object_lcolor( ob, MY_LABEL );
fl_redraw_form( ob->form );
The following is a little application I crufted up to illustrate this:
- - -
#include <stdlib.h>
#include <forms.h>
typedef struct {
FL_FORM *try;
void *vdata;
char *cdata;
long ldata;
FL_OBJECT *red;
FL_OBJECT *green;
FL_OBJECT *blue;
} FD_try;
#define MY_LABEL FL_FREE_COL1
void change_color_cb(FL_OBJECT *ob, long data)
{
int red;
int green;
int blue;
/* Fetch the color -- arbitrarily from the object's col1 */
fl_getmcolor( ob->col1, &red, &green, &blue );
/* Change it. */
fl_mapcolor( MY_LABEL, red, green, blue );
/* This part here is a hack -- I don't see why one should have to do it */
fl_set_object_lcolor( ob, FL_RED );
fl_set_object_lcolor( ob, MY_LABEL );
fl_redraw_form( ob->form );
}
FD_try *create_form_try(void)
{
FL_OBJECT *obj;
FD_try *fdui = (FD_try *) fl_calloc(1, sizeof(*fdui));
fdui->try = fl_bgn_form(FL_NO_BOX, 408, 80);
obj = fl_add_box(FL_EMBOSSED_BOX,0,0,408,80,"");
fl_set_object_color(obj,FL_LEFT_BCOL,FL_COL1);
fdui->red = obj = fl_add_button(FL_NORMAL_BUTTON,12,12,116,52,"Red");
fl_set_object_color(obj,FL_RED,FL_COL1);
fl_set_object_lsize(obj,FL_LARGE_SIZE);
fl_set_object_lcolor( obj, MY_LABEL );
fl_set_object_callback(obj,change_color_cb,0);
fdui->green = obj = fl_add_button(FL_NORMAL_BUTTON,144,12,116,52,"Green");
fl_set_object_color(obj,FL_GREEN,FL_COL1);
fl_set_object_lcolor( obj, MY_LABEL );
fl_set_object_lsize(obj,FL_LARGE_SIZE);
fl_set_object_callback(obj,change_color_cb,0);
fdui->blue = obj = fl_add_button(FL_NORMAL_BUTTON,276,12,116,52,"Blue");
fl_set_object_color(obj,FL_BLUE,FL_COL1);
fl_set_object_lcolor( obj, MY_LABEL );
fl_set_object_lsize(obj,FL_LARGE_SIZE);
fl_set_object_callback(obj,change_color_cb,0);
fl_end_form();
fl_adjust_form_size(fdui->try);
fdui->try->fdui = fdui;
return fdui;
}
int main(int argc, char *argv[])
{
FD_try *fd_try;
fl_initialize(&argc, argv, 0, 0, 0);
fd_try = create_form_try();
/* Initial label color is white */
fl_mapcolor( MY_LABEL, 255, 255, 255 );
fl_show_form(fd_try->try,FL_PLACE_CENTERFREE,FL_FULLBORDER,"try");
fl_do_forms();
return 0;
}
- - -
The above has been tested under 0.89 under IRIX 6.2.
Sorry for any confusion.
spl
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