Greg Ercolano wrote:
> Mikko L wrote:
>> Hope this helps somebody.
>
> Yes, thanks -- I see now.
>
> So it looks like I missed the part about assigning
> Button::default_style = &G_my_style;
> ..in main(), and using NamedStyle instead of Style.
>
> Referring to your changes, I was able to slim the code
> a bit more (to keep the code as small as possible) which
> prevents the need for deriving a custom class.
>
> Here's what I ended up with; comments welcome:
>
Following is bad, because you cant know if Window::default_style is already
constructed or not.
For example, in my windows box app will crash, because because both
default_style's are empty.
G_window_style and G_button_style gets constructed before default_style's.
> NamedStyle G_window_style(*Window::default_style);
> NamedStyle G_button_style(*Button::default_style);
In fact copy ctor of NamedStyle is bad, cause it will also copy style name
and break Style::find() function.
Instead you should use, if you dont want use revert function.
NamedStyle G_window_style("MyWindowStyle", NULL, NULL);
NamedStyle G_button_style("MyButtonStyle", NULL, NULL);
And then set parent styles before you overwrite default_style's in main.
BR,
Mikko L
----------------------------------------------
Here's working code:
#include <fltk/run.h>
#include <fltk/Window.h>
#include <fltk/Button.h>
#include <fltk/Choice.h>
#include <fltk/Style.h>
#include <stdio.h>
#include <string.h>
using namespace fltk;
//
// FLTK 2.x example showing how to use NamedStyle to change widget defaults
//
// Globals for separate window + button styles
NamedStyle G_window_style("MyWindowStyle", NULL, NULL);
NamedStyle G_button_style("MyButtonStyle", NULL, NULL);
void Choice_CB(fltk::Widget *w) {
Choice *c = (Choice*)w;
const char *choice = c->get_item()->label(); // "SmallFont",
"BigFont", etc
printf("You picked: '%s'\n", choice);
if ( strcmp(choice, "SmallFont" ) == 0 ) { G_button_style.labelsize(12);
}
if ( strcmp(choice, "BigFont" ) == 0 ) { G_button_style.labelsize(24);
}
if ( strcmp(choice, "GrayButton" ) == 0 ) {
G_button_style.buttoncolor(GRAY80); }
if ( strcmp(choice, "RedButton" ) == 0 ) {
G_button_style.buttoncolor(RED); }
if ( strcmp(choice, "GrayWindow" ) == 0 ) { G_window_style.color(GRAY80);
}
if ( strcmp(choice, "RedWindow" ) == 0 ) { G_window_style.color(RED); }
w->window()->redraw(); // tell window to
redraw itself..
}
int main(int argc, char** argv) {
// Set correct parents for styles
G_window_style.parent_ = Window::default_style;
G_button_style.parent_ = Button::default_style;
// Set our styles as default
Window::default_style = &G_window_style;
Button::default_style = &G_button_style;
// Now do normal widget construction..
Window w(300,200);
w.begin();
Button b(50,10,200,25,"Some Button");
Button b2(50,40,200,25,"Some Button");
Button b3(50,70,200,25,"Some Button");
Choice c(50,100,200,25,"Style");
c.add("SmallFont");
c.add("BigFont");
c.add("RedButton");
c.add("GrayButton");
c.add("GrayWindow");
c.add("RedWindow");
c.callback(Choice_CB);
w.end();
w.show(argc,argv);
return(run());
}
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