MDI using Fl_Tabs

[Dimond Stak]

Hi all.
I learn FLTK and wanna make Tabs-MDI application. But I can't find how can I close Tab? I mean I can't find "x" button on Tabs. Is this really the lack of functionality?

[Albrecht Schlosser]

For now (as of FLTK 1.3.x) this functionality doesn't exist. In FLTK 1.3
you can subclass Fl_Tabs and do it yourself or you can add a button
elsewhere to close the "active" tab. You can also define a global
shortcut like ctrl/q or ctrl/w to close the active tab.

There are some proposals for closable tabs (with an 'X' button like in
current browsers and some editors) and this new functionality will
likely be available in FLTK 1.4.0. There's no schedule though and no
release planning.

[K Dmitrij]

algorithm:

0) derives from Fl_Tabs;

1) copy draw_tab() mehod from Fl_Tabs.cxx and needs draw cross-image in right corner;

2) to process FL_PUSH event, and close tab if click was inside of the cross-image

---

From Dimond Stak

 

Hi all.
I learn FLTK and wanna make Tabs-MDI application. But I can't find how can I close Tab? I mean I can't find "x" button on Tabs. Is this really the lack of functionality?

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[Dimond Stak]

Thanks Albrecht, TheKdiman. I'll try to derive my subclass from Fl_Tabs.

вторник, 17 октября 2017 г., 18:26:07 UTC+3 пользователь Dimond Stak написал:

[Dimond Stak]

draw_tab is private, so I have to dive into Fl_Tabs code.

вторник, 17 октября 2017 г., 18:26:07 UTC+3 пользователь Dimond Stak написал:

Hi all.

[Greg Ercolano]

On 10/18/17 11:52, Dimond Stak wrote:
> draw_tab is private,

Yes, in 1.3.x.

Try 1.4.x -- in 1.4.x it's "protected", so you can access it.

--- snip
class FL_EXPORT Fl_Tabs : public Fl_Group {

Fl_Widget *push_;

protected:
[..]
virtual void clear_tab_positions();
virtual void draw_tab(int x1, int x2, int W, int H, Fl_Widget* o, int sel=0);
[..]
--- snip

[Dimond Stak]

Thanks Greg, it looks like draw_tab uses "Fl_Widget *push_;" but "push_" is private too.

среда, 18 октября 2017 г., 22:10:11 UTC+3 пользователь Greg Ercolano написал:

[Greg Ercolano]

On 10/18/17 13:50, Dimond Stak wrote:
> Thanks Greg, it looks like draw_tab uses "Fl_Widget *push_;" but "push_" is private too.

Do you need it though?

You just need to re-implement draw_tab() to call Fl_Tabs::draw_tab(),
and then add your drawing code over that to draw the 'x', right? e.g.

class YourTabs : public Fl_Tabs {
..
void draw_tab(int x1, int x2, int W, int H, Fl_Widget* o, int sel=0) {
Fl_Tabs::draw_tab(x1,x2,W,H,o,sel);
// Add your 'x' drawing code here..
}