f09e17c3c5
- remove obsolete svn '$Id$' tags from all source files - update .fl files and generated files accordingly - replace 'http://www.fltk.org' URL's with 'https://...' - replace bug report URL 'str.php' with 'bugs.php' - remove trailing whitespace - fix other whitespace errors flagged by Git - add and/or fix missing or wrong standard headers - convert tabs to spaces in all source files The only relevant code changes are in the fluid/ folder where some .fl files and other source files were used to generate the '$Id' headers and footers.
268 lines
9.0 KiB
C++
268 lines
9.0 KiB
C++
//
|
|
// Tab header file for the Fast Light Tool Kit (FLTK).
|
|
//
|
|
// Copyright 1998-2017 by Bill Spitzak and others.
|
|
//
|
|
// This library is free software. Distribution and use rights are outlined in
|
|
// the file "COPYING" which should have been included with this file. If this
|
|
// file is missing or damaged, see the license at:
|
|
//
|
|
// https://www.fltk.org/COPYING.php
|
|
//
|
|
// Please see the following page on how to report bugs and issues:
|
|
//
|
|
// https://www.fltk.org/bugs.php
|
|
//
|
|
|
|
/* \file
|
|
Fl_Tabs widget . */
|
|
|
|
#ifndef Fl_Tabs_H
|
|
#define Fl_Tabs_H
|
|
|
|
#include "Fl_Group.H"
|
|
|
|
/**
|
|
The Fl_Tabs widget is the "file card tabs"
|
|
interface that allows you to put lots and lots of buttons and
|
|
switches in a panel, as popularized by many toolkits.
|
|
|
|
\image html tabs.png
|
|
\image latex tabs.png "Fl_Tabs" width=8cm
|
|
|
|
Clicking the tab makes a child visible() by calling
|
|
show() on it, and all other children are made invisible
|
|
by calling hide() on them. Usually the children are Fl_Group widgets
|
|
containing several widgets themselves.
|
|
|
|
Each child makes a card, and its label() is printed
|
|
on the card tab, including the label font and style. The
|
|
selection color of that child is used to color the tab, while
|
|
the color of the child determines the background color of the pane.
|
|
'&' in labels are used to prefix a shortcut that is drawn underlined and
|
|
that activates the corresponding tab; repeated '&&' avoids that.
|
|
|
|
The size of the tabs is controlled by the bounding box of the
|
|
children (there should be some space between the children and
|
|
the edge of the Fl_Tabs), and the tabs may be placed
|
|
"inverted" on the bottom - this is determined by which
|
|
gap is larger. It is easiest to lay this out in fluid, using the
|
|
fluid browser to select each child group and resize them until
|
|
the tabs look the way you want them to.
|
|
|
|
The background area behind and to the right of the tabs is
|
|
"transparent", exposing the background detail of the parent. The
|
|
value of Fl_Tabs::box() does not affect this area. So if Fl_Tabs is
|
|
resized by itself without the parent, force the appropriate parent
|
|
(visible behind the tabs) to redraw() to prevent artifacts.
|
|
|
|
See "Resizing Caveats" below on how to keep tab heights constant.
|
|
See "Callback's Use Of when()" on how to control the details
|
|
of how clicks invoke the callback().
|
|
|
|
A typical use of the Fl_Tabs widget:
|
|
|
|
\par
|
|
\code
|
|
// Typical use of Fl_Tabs
|
|
Fl_Tabs *tabs = new Fl_Tabs(10,10,300,200);
|
|
{
|
|
Fl_Group *grp1 = new Fl_Group(20,30,280,170,"Tab1");
|
|
{
|
|
..widgets that go in tab#1..
|
|
}
|
|
grp1->end();
|
|
Fl_Group *grp2 = new Fl_Group(20,30,280,170,"Tab2");
|
|
{
|
|
..widgets that go in tab#2..
|
|
}
|
|
grp2->end();
|
|
}
|
|
tabs->end();
|
|
\endcode
|
|
|
|
\b Default \b Appearance
|
|
|
|
The appearance of each "tab" is taken from the label() and color() of the
|
|
child group corresponding to that "tab" and panel. Where the "tabs" appear
|
|
depends on the position and size of the child groups that make up the
|
|
panels within the Fl_Tab, i.e. whether there is more space above or
|
|
below them. The height of the "tabs" depends on how much free space
|
|
is available.
|
|
|
|
\image html tabs_default.png "Fl_Tabs Default Appearance"
|
|
\image latex tabs_default.png "Fl_Tabs Default Appearance" width=8cm
|
|
|
|
\b Highlighting \b The \b Selected \b Tab
|
|
|
|
The selected "tab" can be highlighted further by setting the
|
|
selection_color() of the Fl_Tab itself, e.g.
|
|
|
|
\par
|
|
\code
|
|
..
|
|
tabs = new Fl_Tabs(..);
|
|
tabs->selection_color(FL_DARK3);
|
|
..
|
|
\endcode
|
|
|
|
The result of the above looks like:
|
|
\image html tabs_selection.png "Highlighting the selected tab"
|
|
\image latex tabs_selection.png "Highlighting the selected tab" width=8cm
|
|
|
|
\b Uniform \b Tab \b and \b Panel \b Appearance
|
|
|
|
In order to have uniform tab and panel appearance, not only must the color()
|
|
and selection_color() for each child group be set, but also the
|
|
selection_color() of the Fl_Tab itself any time a new "tab" is selected.
|
|
This can be achieved within the Fl_Tab callback, e.g.
|
|
|
|
\par
|
|
\code
|
|
void MyTabCallback(Fl_Widget *w, void*) {
|
|
Fl_Tabs *tabs = (Fl_Tabs*)w;
|
|
// When tab changed, make sure it has same color as its group
|
|
tabs->selection_color( (tab->value())->color() );
|
|
}
|
|
..
|
|
int main(..) {
|
|
// Define tabs widget
|
|
tabs = new Fl_Tabs(..);
|
|
tabs->callback(MyTabCallback);
|
|
|
|
// Create three tabs each colored differently
|
|
grp1 = new Fl_Group(.. "One");
|
|
grp1->color(9);
|
|
grp1->selection_color(9);
|
|
grp1->end();
|
|
|
|
grp2 = new Fl_Group(.. "Two");
|
|
grp2->color(10);
|
|
grp2->selection_color(10);
|
|
grp2->end();
|
|
|
|
grp3 = new Fl_Group(.. "Three");
|
|
grp3->color(14);
|
|
grp3->selection_color(14);
|
|
grp3->end();
|
|
..
|
|
// Make sure default tab has same color as its group
|
|
tabs->selection_color( (tab->value())->color() );
|
|
..
|
|
return Fl::run();
|
|
}
|
|
\endcode
|
|
|
|
The result of the above looks like:
|
|
\image html tabs_uniform.png "Fl_Tabs with uniform colors"
|
|
\image latex tabs_uniform.png "Fl_Tabs with uniform colors" width=8cm
|
|
|
|
\b Resizing \b Caveats
|
|
|
|
When Fl_Tabs is resized vertically, the default behavior scales the
|
|
tab's height as well as its children. To keep the tab height constant
|
|
during resizing, set the tab widget's resizable() to one of the tab's
|
|
child groups, i.e.
|
|
|
|
\par
|
|
\code
|
|
tabs = new Fl_Tabs(..);
|
|
grp1 = new Fl_Group(..);
|
|
..
|
|
grp2 = new Fl_Group(..);
|
|
..
|
|
tabs->end();
|
|
tabs->resizable(grp1); // keeps tab height constant
|
|
\endcode
|
|
|
|
\par Callback's Use Of when()
|
|
|
|
As of FLTK 1.3.3, Fl_Tabs() supports the following flags for when():
|
|
|
|
- \ref FL_WHEN_NEVER -- callback never invoked (all flags off)
|
|
- \ref FL_WHEN_CHANGED -- if flag set, invokes callback when a tab has been changed (on click or keyboard navigation)
|
|
- \ref FL_WHEN_NOT_CHANGED -- if flag set, invokes callback when the tabs remain unchanged (on click or keyboard navigation)
|
|
- \ref FL_WHEN_RELEASE -- if flag set, invokes callback on RELEASE of mouse button or keyboard navigation
|
|
|
|
Notes:
|
|
|
|
-# The above flags can be logically OR-ed (|) or added (+) to combine behaviors.
|
|
-# The default value for when() is \ref FL_WHEN_RELEASE (inherited from Fl_Widget).
|
|
-# If \ref FL_WHEN_RELEASE is the \em only flag specified,
|
|
the behavior will be as if (\ref FL_WHEN_RELEASE|\ref FL_WHEN_CHANGED) was specified.
|
|
-# The value of changed() will be valid during the callback.
|
|
-# If both \ref FL_WHEN_CHANGED and \ref FL_WHEN_NOT_CHANGED are specified,
|
|
the callback is invoked whether the tab has been changed or not.
|
|
The changed() method can be used to determine the cause.
|
|
-# \ref FL_WHEN_NOT_CHANGED can happen if someone clicks on an already selected tab,
|
|
or if a keyboard navigation attempt results in no change to the tabs,
|
|
such as using the arrow keys while at the left or right end of the tabs.
|
|
*/
|
|
class FL_EXPORT Fl_Tabs : public Fl_Group {
|
|
|
|
Fl_Widget *push_;
|
|
|
|
protected:
|
|
|
|
int *tab_pos; // array of x-offsets of tabs per child + 1
|
|
int *tab_width; // array of widths of tabs per child + 1
|
|
int tab_count; // array size
|
|
Fl_Align tab_align_; // tab label alignment
|
|
|
|
virtual void redraw_tabs();
|
|
virtual int tab_positions(); // allocate and calculate tab positions
|
|
virtual void clear_tab_positions();
|
|
virtual void draw_tab(int x1, int x2, int W, int H, Fl_Widget* o, int sel=0);
|
|
virtual int tab_height();
|
|
|
|
void draw();
|
|
|
|
public:
|
|
|
|
Fl_Tabs(int X, int Y, int W, int H, const char *L = 0);
|
|
virtual ~Fl_Tabs();
|
|
|
|
int handle(int);
|
|
Fl_Widget *value();
|
|
int value(Fl_Widget *);
|
|
/**
|
|
Returns the tab group for the tab the user has currently down-clicked on
|
|
and remains over until FL_RELEASE. Otherwise, returns NULL.
|
|
|
|
While the user is down-clicked on a tab, the return value is the tab group
|
|
for that tab. But as soon as the user releases, or drags off the tab with
|
|
the button still down, the return value will be NULL.
|
|
|
|
\see push(Fl_Widget*).
|
|
*/
|
|
Fl_Widget *push() const {return push_;}
|
|
int push(Fl_Widget *);
|
|
|
|
// Returns the widget of the tab the user clicked on at event_x/event_y.
|
|
virtual Fl_Widget *which(int event_x, int event_y);
|
|
|
|
// Returns the position and size available to be used by its children.
|
|
void client_area(int &rx, int &ry, int &rw, int &rh, int tabh=0);
|
|
|
|
/**
|
|
Sets the tab label alignment.
|
|
|
|
The default is FL_ALIGN_CENTER so tab labels are centered, but since
|
|
the label space is measured (per label) to fit the labels, there
|
|
wouldn't be any difference if labels were aligned left or right.
|
|
|
|
If you want to show an image (icon) next to the group's label you can
|
|
set a different label alignment. FL_ALIGN_IMAGE_NEXT_TO_TEXT is the
|
|
recommended alignment to show the icon left of the text.
|
|
*/
|
|
void tab_align(Fl_Align a) {tab_align_ = a;}
|
|
/**
|
|
Gets the tab label alignment.
|
|
|
|
\see tab_align(Fl_Align)
|
|
*/
|
|
Fl_Align tab_align() const {return tab_align_;}
|
|
};
|
|
|
|
#endif
|