Domingo Alvarez Duarte wrote:
> Here you are pointing one of problems of Fl_Tabs "Guess work", When adding
> a group to Fl_Tabs the label of the group isn't adapted to the labelsize
> of Fl_Tabs resulting in strange tabs.
I see, this is handy.
So the proposed client_area() makes it easier to procedurally
create the child groups without having to mentally calculate
their sizes, and hard code 'magic numbers' for the group's XYWH. eg:
Fl_Tab *tab = new Fl_Tab(20,20,400,350);
// Create child groups based on client_area()'s return values
int X,Y,W,H; tab->client_area(X,Y,W,H);
Fl_Group *g1 = new Fl_Group(X,Y,W,H,"Tab 1"); // no magic numbers for
xywh
Fl_Group *g2 = new Fl_Group(X,Y,W,H,"Tab 2"); // no magic numbers for
xywh
I tried this, and this works nicely..
Except: client_area() uses Fl_Tabs::labelsize() to do its calculations
when no children exist yet.
Trouble is, Fl_Tabs::labelsize() has nothing to do with the size of the
tab's labels; each child's labelsize() is what defines each tab's label
size.
If the child group's label sizes are different, then client_area()
won't give a correct answer.
However, if it accepted an optional font size, then the app
could pass the maximum font size for more accurate xywh values.
+1 for adding this method, or something like it.
I'd suggest changing the name of the parameter "top_if_first"
to "tabs_on_top", which I think might be clearer.
Here's a small test program I used to play with client_area();
(a modified version of the examples/tabs-simple)
It currently shows the problem defined above (different sized
child labels) which could be solved if client_area() accepted
an optional size parameter. However, it works fine if the children
label sizes are all the same (which is the more common case).
#include <FL/Fl.H>
#include <FL/Fl_Window.H>
#include <FL/Fl_Tabs.H>
#include <FL/Fl_Group.H>
#include <FL/Fl_Button.H>
int main(int argc, char *argv[]) {
Fl::scheme("gtk+");
Fl_Window *win = new Fl_Window(500,200,"Tabs Example");
{
// Create the tab widget
Fl_Tabs *tabs = new Fl_Tabs(10,10,500-20,200-20);
{
int X,Y,W,H;
tabs->client_area(X,Y,W,H,true); // TABS ON TOP
//tabs->client_area(X,Y,W,H,false); // TABS ON BOTTOM
Fl_Group *aaa = new Fl_Group(X,Y,W,H,"Aaa"); // no magic #'s
aaa->labelsize(20);
{
Fl_Button *b1 = new Fl_Button(X+20, Y+20,90,25,"Button A1");
b1->color(88+1);
Fl_Button *b2 = new Fl_Button(X+20, Y+50,90,25,"Button A2");
b2->color(88+2);
Fl_Button *b3 = new Fl_Button(X+20, Y+80,90,25,"Button A3");
b3->color(88+3);
}
aaa->end();
Fl_Group *bbb = new Fl_Group(X,Y,W,H,"Bbb"); // no magic #'s
bbb->labelsize(30);
{
Fl_Button *b1 = new Fl_Button( X+20,Y+20,90,25,"Button B1");
b1->color(88+1);
Fl_Button *b2 = new Fl_Button(X+120,Y+20,90,25,"Button B2");
b2->color(88+3);
Fl_Button *b3 = new Fl_Button(X+220,Y+20,90,25,"Button B3");
b3->color(88+5);
Fl_Button *b4 = new Fl_Button( X+20,Y+50,90,25,"Button B4");
b4->color(88+2);
Fl_Button *b5 = new Fl_Button(X+120,Y+50,90,25,"Button B5");
b5->color(88+4);
Fl_Button *b6 = new Fl_Button(X+220,Y+50,90,25,"Button B6");
b6->color(88+6);
}
bbb->end();
Fl_Group *ccc = new Fl_Group(X,Y,W,H,"Ccc"); // no magic #'s
ccc->labelsize(35);
{
Fl_Button *b1 = new Fl_Button( X+20,Y+20,90,25,"Button C1");
b1->color(88+1);
}
ccc->end();
}
tabs->end();
}
win->end();
win->show(argc, argv);
return(Fl::run());
}
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