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//
// Packing widget for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2023 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
//
// Based on code by Curtis Edwards
// Group that compresses all its children together and resizes to surround
// them on each redraw (only if box() is zero)
// Bugs: ?
#include <FL/Fl.H>
#include <FL/Fl_Pack.H>
#include <FL/fl_draw.H>
/**
Creates a new Fl_Pack widget using the given position, size,
and label string.
The default boxtype is FL_NO_BOX.
The default type() is Fl_Pack::VERTICAL.
The destructor <I>also deletes all the children</I>. This allows a
whole tree to be deleted at once, without having to keep a pointer to
all the children in the user code. A kludge has been done so the
Fl_Pack and all of its children can be automatic (local)
variables, but you must declare the Fl_Pack <I>first</I>, so
that it is destroyed last.
\param[in] X,Y X and Y coordinates (position)
\param[in] W,H width and height, respectively
\param[in] L label (optional)
*/
Fl_Pack::Fl_Pack(int X, int Y, int W, int H, const char *L)
: Fl_Group(X, Y, W, H, L) {
resizable(0);
spacing_ = 0;
// type(VERTICAL); // already set like this
}
/** Draw a rectangular area as a background filler.
If the box type has a background (is not a frame), this will clip to the
rectangular area and draw the box. Otherwise, it will draw a rectangle
in widget color.
\param[in] rect fill this rectangle inside the widget bounds
*/
void Fl_Pack::draw_filler_(const Fl_Rect& rect) {
if (Fl::box_bg(box())) {
fl_push_clip(rect.x(), rect.y(), rect.w(), rect.h());
draw_box();
fl_pop_clip();
} else {
fl_rectf(rect.x(), rect.y(), rect.w(), rect.h(), color());
}
}
void Fl_Pack::draw() {
int tx = x()+Fl::box_dx(box());
int ty = y()+Fl::box_dy(box());
int tw = w()-Fl::box_dw(box());
int th = h()-Fl::box_dh(box());
int rw, rh;
int current_position = horizontal() ? tx : ty;
int maximum_position = current_position;
uchar d = damage();
Fl_Widget*const* a = array();
int i;
if (horizontal()) {
rw = -spacing_;
rh = th;
for (i = children(); i--;)
if (child(i)->visible()) {
if (child(i) != this->resizable()) rw += child(i)->w();
rw += spacing_;
}
} else {
rw = tw;
rh = -spacing_;
for (i = children(); i--;)
if (child(i)->visible()) {
if (child(i) != this->resizable()) rh += child(i)->h();
rh += spacing_;
}
}
for (i = children(); i--;) {
Fl_Widget* o = *a++;
if (o->visible()) {
int X,Y,W,H;
if (horizontal()) {
X = current_position;
W = o->w();
Y = ty;
H = th;
} else {
X = tx;
W = tw;
Y = current_position;
H = o->h();
}
// Last child, if resizable, takes all remaining room
if(i == 0 && o == this->resizable()) {
if(horizontal())
W = tw - rw;
else
H = th - rh;
}
if (spacing_ && current_position>maximum_position && box() &&
(X != o->x() || Y != o->y() || d&FL_DAMAGE_ALL)) {
if (horizontal())
draw_filler_( { maximum_position, ty, spacing_, th } );
else
draw_filler_( { tx, maximum_position, tw, spacing_ } );
}
if (X != o->x() || Y != o->y() || W != o->w() || H != o->h()) {
o->resize(X,Y,W,H);
// Clear all damage flags, but *set* FL_DAMAGE_ALL, even if the widget
// may be clipped by the parent and needs no redraw.
o->clear_damage(FL_DAMAGE_ALL);
}
if (d&FL_DAMAGE_ALL) {
draw_child(*o);
draw_outside_label(*o);
} else {
update_child(*o);
}
// Make sure that all damage flags are cleared.
o->clear_damage();
// child's draw() can change it's size, so use new size:
current_position += (horizontal() ? o->w() : o->h());
if (current_position > maximum_position)
maximum_position = current_position;
current_position += spacing_;
}
}
if (horizontal()) {
if (maximum_position < tx+tw && box()) {
draw_filler_( { maximum_position, ty, tx+tw-maximum_position, th } );
}
tw = maximum_position-tx;
} else {
if (maximum_position < ty+th && box()) {
draw_filler_( { tx, maximum_position, tw, ty+th-maximum_position } );
}
th = maximum_position-ty;
}
tw += Fl::box_dw(box()); if (tw <= 0) tw = 1;
th += Fl::box_dh(box()); if (th <= 0) th = 1;
if (tw != w() || th != h()) {
Fl_Widget::resize(x(),y(),tw,th);
Fl_Group *parent = this->parent();
if (parent) parent->init_sizes();
d = FL_DAMAGE_ALL;
}
if (d&FL_DAMAGE_ALL) {
if (Fl::box_bg(box())) {
// Make sure that we only draw the frame part, because the children
// and fillers are already rendered at this point.
draw_box(fl_frame(box()), x(), y(), w(), h(), color());
} else {
draw_box();
}
draw_label();
}
}
/** Override Fl_Group resize behavior.
Resizing an Fl_Pack will not resize any of its children, but trigger a
redraw, which in turn recalculates the dimensions of all children.
\param[in] X, Y, W, H new position and size of the Fl_Pack widget
*/
void Fl_Pack::resize(int X, int Y, int W, int H) {
Fl_Widget::resize(X, Y, W, H);
redraw();
}
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