330 lines
8.9 KiB
C++
330 lines
8.9 KiB
C++
/*************************************************************************/
|
|
/* box_container.cpp */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/*************************************************************************/
|
|
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
|
|
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
|
|
/* */
|
|
/* Permission is hereby granted, free of charge, to any person obtaining */
|
|
/* a copy of this software and associated documentation files (the */
|
|
/* "Software"), to deal in the Software without restriction, including */
|
|
/* without limitation the rights to use, copy, modify, merge, publish, */
|
|
/* distribute, sublicense, and/or sell copies of the Software, and to */
|
|
/* permit persons to whom the Software is furnished to do so, subject to */
|
|
/* the following conditions: */
|
|
/* */
|
|
/* The above copyright notice and this permission notice shall be */
|
|
/* included in all copies or substantial portions of the Software. */
|
|
/* */
|
|
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
|
|
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
|
|
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
|
|
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
|
|
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
|
|
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
|
|
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
|
/*************************************************************************/
|
|
|
|
#include "box_container.h"
|
|
#include "label.h"
|
|
#include "margin_container.h"
|
|
|
|
struct _MinSizeCache {
|
|
|
|
int min_size;
|
|
bool will_stretch;
|
|
int final_size;
|
|
};
|
|
|
|
void BoxContainer::_resort() {
|
|
|
|
/** First pass, determine minimum size AND amount of stretchable elements */
|
|
|
|
Size2i new_size = get_size();
|
|
|
|
int sep = get_constant("separation"); //,vertical?"VBoxContainer":"HBoxContainer");
|
|
|
|
bool first = true;
|
|
int children_count = 0;
|
|
int stretch_min = 0;
|
|
int stretch_avail = 0;
|
|
float stretch_ratio_total = 0;
|
|
Map<Control *, _MinSizeCache> min_size_cache;
|
|
|
|
for (int i = 0; i < get_child_count(); i++) {
|
|
Control *c = Object::cast_to<Control>(get_child(i));
|
|
if (!c || !c->is_visible_in_tree())
|
|
continue;
|
|
if (c->is_set_as_toplevel())
|
|
continue;
|
|
|
|
Size2i size = c->get_combined_minimum_size();
|
|
_MinSizeCache msc;
|
|
|
|
if (vertical) { /* VERTICAL */
|
|
stretch_min += size.height;
|
|
msc.min_size = size.height;
|
|
msc.will_stretch = c->get_v_size_flags() & SIZE_EXPAND;
|
|
|
|
} else { /* HORIZONTAL */
|
|
stretch_min += size.width;
|
|
msc.min_size = size.width;
|
|
msc.will_stretch = c->get_h_size_flags() & SIZE_EXPAND;
|
|
}
|
|
|
|
if (msc.will_stretch) {
|
|
stretch_avail += msc.min_size;
|
|
stretch_ratio_total += c->get_stretch_ratio();
|
|
}
|
|
msc.final_size = msc.min_size;
|
|
min_size_cache[c] = msc;
|
|
children_count++;
|
|
}
|
|
|
|
if (children_count == 0)
|
|
return;
|
|
|
|
int stretch_max = (vertical ? new_size.height : new_size.width) - (children_count - 1) * sep;
|
|
int stretch_diff = stretch_max - stretch_min;
|
|
if (stretch_diff < 0) {
|
|
//avoid negative stretch space
|
|
stretch_diff = 0;
|
|
}
|
|
|
|
stretch_avail += stretch_diff; //available stretch space.
|
|
/** Second, pass successively to discard elements that can't be stretched, this will run while stretchable
|
|
elements exist */
|
|
|
|
bool has_stretched = false;
|
|
while (stretch_ratio_total > 0) { // first of all, don't even be here if no stretchable objects exist
|
|
|
|
has_stretched = true;
|
|
bool refit_successful = true; //assume refit-test will go well
|
|
float error = 0; // Keep track of accumulated error in pixels
|
|
|
|
for (int i = 0; i < get_child_count(); i++) {
|
|
|
|
Control *c = Object::cast_to<Control>(get_child(i));
|
|
if (!c || !c->is_visible_in_tree())
|
|
continue;
|
|
if (c->is_set_as_toplevel())
|
|
continue;
|
|
|
|
ERR_FAIL_COND(!min_size_cache.has(c));
|
|
_MinSizeCache &msc = min_size_cache[c];
|
|
|
|
if (msc.will_stretch) { //wants to stretch
|
|
//let's see if it can really stretch
|
|
float final_pixel_size = stretch_avail * c->get_stretch_ratio() / stretch_ratio_total;
|
|
// Add leftover fractional pixels to error accumulator
|
|
error += final_pixel_size - (int)final_pixel_size;
|
|
if (final_pixel_size < msc.min_size) {
|
|
//if available stretching area is too small for widget,
|
|
//then remove it from stretching area
|
|
msc.will_stretch = false;
|
|
stretch_ratio_total -= c->get_stretch_ratio();
|
|
refit_successful = false;
|
|
stretch_avail -= msc.min_size;
|
|
msc.final_size = msc.min_size;
|
|
break;
|
|
} else {
|
|
msc.final_size = final_pixel_size;
|
|
// Dump accumulated error if one pixel or more
|
|
if (error >= 1) {
|
|
msc.final_size += 1;
|
|
error -= 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (refit_successful) //uf refit went well, break
|
|
break;
|
|
}
|
|
|
|
/** Final pass, draw and stretch elements **/
|
|
|
|
int ofs = 0;
|
|
if (!has_stretched) {
|
|
switch (align) {
|
|
case ALIGN_BEGIN:
|
|
break;
|
|
case ALIGN_CENTER:
|
|
ofs = stretch_diff / 2;
|
|
break;
|
|
case ALIGN_END:
|
|
ofs = stretch_diff;
|
|
break;
|
|
}
|
|
}
|
|
|
|
first = true;
|
|
int idx = 0;
|
|
|
|
for (int i = 0; i < get_child_count(); i++) {
|
|
|
|
Control *c = Object::cast_to<Control>(get_child(i));
|
|
if (!c || !c->is_visible_in_tree())
|
|
continue;
|
|
if (c->is_set_as_toplevel())
|
|
continue;
|
|
|
|
_MinSizeCache &msc = min_size_cache[c];
|
|
|
|
if (first)
|
|
first = false;
|
|
else
|
|
ofs += sep;
|
|
|
|
int from = ofs;
|
|
int to = ofs + msc.final_size;
|
|
|
|
if (msc.will_stretch && idx == children_count - 1) {
|
|
//adjust so the last one always fits perfect
|
|
//compensating for numerical imprecision
|
|
|
|
to = vertical ? new_size.height : new_size.width;
|
|
}
|
|
|
|
int size = to - from;
|
|
|
|
Rect2 rect;
|
|
|
|
if (vertical) {
|
|
|
|
rect = Rect2(0, from, new_size.width, size);
|
|
} else {
|
|
|
|
rect = Rect2(from, 0, size, new_size.height);
|
|
}
|
|
|
|
fit_child_in_rect(c, rect);
|
|
|
|
ofs = to;
|
|
idx++;
|
|
}
|
|
}
|
|
|
|
Size2 BoxContainer::get_minimum_size() const {
|
|
|
|
/* Calculate MINIMUM SIZE */
|
|
|
|
Size2i minimum;
|
|
int sep = get_constant("separation"); //,vertical?"VBoxContainer":"HBoxContainer");
|
|
|
|
bool first = true;
|
|
|
|
for (int i = 0; i < get_child_count(); i++) {
|
|
Control *c = Object::cast_to<Control>(get_child(i));
|
|
if (!c)
|
|
continue;
|
|
if (c->is_set_as_toplevel())
|
|
continue;
|
|
|
|
if (!c->is_visible()) {
|
|
continue;
|
|
}
|
|
|
|
Size2i size = c->get_combined_minimum_size();
|
|
|
|
if (vertical) { /* VERTICAL */
|
|
|
|
if (size.width > minimum.width) {
|
|
minimum.width = size.width;
|
|
}
|
|
|
|
minimum.height += size.height + (first ? 0 : sep);
|
|
|
|
} else { /* HORIZONTAL */
|
|
|
|
if (size.height > minimum.height) {
|
|
minimum.height = size.height;
|
|
}
|
|
|
|
minimum.width += size.width + (first ? 0 : sep);
|
|
}
|
|
|
|
first = false;
|
|
}
|
|
|
|
return minimum;
|
|
}
|
|
|
|
void BoxContainer::_notification(int p_what) {
|
|
|
|
switch (p_what) {
|
|
|
|
case NOTIFICATION_SORT_CHILDREN: {
|
|
|
|
_resort();
|
|
} break;
|
|
case NOTIFICATION_THEME_CHANGED: {
|
|
|
|
minimum_size_changed();
|
|
} break;
|
|
}
|
|
}
|
|
|
|
void BoxContainer::set_alignment(AlignMode p_align) {
|
|
align = p_align;
|
|
_resort();
|
|
}
|
|
|
|
BoxContainer::AlignMode BoxContainer::get_alignment() const {
|
|
return align;
|
|
}
|
|
|
|
void BoxContainer::add_spacer(bool p_begin) {
|
|
|
|
Control *c = memnew(Control);
|
|
c->set_mouse_filter(MOUSE_FILTER_PASS); //allow spacer to pass mouse events
|
|
|
|
if (vertical)
|
|
c->set_v_size_flags(SIZE_EXPAND_FILL);
|
|
else
|
|
c->set_h_size_flags(SIZE_EXPAND_FILL);
|
|
|
|
add_child(c);
|
|
if (p_begin)
|
|
move_child(c, 0);
|
|
}
|
|
|
|
BoxContainer::BoxContainer(bool p_vertical) {
|
|
|
|
vertical = p_vertical;
|
|
align = ALIGN_BEGIN;
|
|
//set_ignore_mouse(true);
|
|
set_mouse_filter(MOUSE_FILTER_PASS);
|
|
}
|
|
|
|
void BoxContainer::_bind_methods() {
|
|
|
|
ClassDB::bind_method(D_METHOD("add_spacer", "begin"), &BoxContainer::add_spacer);
|
|
ClassDB::bind_method(D_METHOD("get_alignment"), &BoxContainer::get_alignment);
|
|
ClassDB::bind_method(D_METHOD("set_alignment", "alignment"), &BoxContainer::set_alignment);
|
|
|
|
BIND_ENUM_CONSTANT(ALIGN_BEGIN);
|
|
BIND_ENUM_CONSTANT(ALIGN_CENTER);
|
|
BIND_ENUM_CONSTANT(ALIGN_END);
|
|
|
|
ADD_PROPERTY(PropertyInfo(Variant::INT, "alignment", PROPERTY_HINT_ENUM, "Begin,Center,End"), "set_alignment", "get_alignment");
|
|
}
|
|
|
|
MarginContainer *VBoxContainer::add_margin_child(const String &p_label, Control *p_control, bool p_expand) {
|
|
|
|
Label *l = memnew(Label);
|
|
l->set_text(p_label);
|
|
add_child(l);
|
|
MarginContainer *mc = memnew(MarginContainer);
|
|
mc->add_constant_override("margin_left", 0);
|
|
mc->add_child(p_control);
|
|
add_child(mc);
|
|
if (p_expand)
|
|
mc->set_v_size_flags(SIZE_EXPAND_FILL);
|
|
|
|
return mc;
|
|
}
|