250 lines
8 KiB
C++
250 lines
8 KiB
C++
/*************************************************************************/
|
|
/* flow_container.cpp */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/*************************************************************************/
|
|
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
|
|
/* Copyright (c) 2014-2022 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 "scene/gui/container.h"
|
|
|
|
#include "flow_container.h"
|
|
|
|
struct _LineData {
|
|
int child_count = 0;
|
|
int min_line_height = 0;
|
|
int min_line_length = 0;
|
|
int stretch_avail = 0;
|
|
float stretch_ratio_total = 0;
|
|
};
|
|
|
|
void FlowContainer::_resort() {
|
|
// Avoid resorting if invisible.
|
|
if (!is_visible_in_tree()) {
|
|
return;
|
|
}
|
|
|
|
int separation_horizontal = get_constant("hseparation");
|
|
int separation_vertical = get_constant("vseparation");
|
|
|
|
Map<Control *, Size2i> children_minsize_cache;
|
|
|
|
Vector<_LineData> lines_data;
|
|
|
|
Vector2i ofs;
|
|
int line_height = 0;
|
|
int line_length = 0;
|
|
float line_stretch_ratio_total = 0;
|
|
int current_container_size = vertical ? get_rect().size.y : get_rect().size.x;
|
|
int children_in_current_line = 0;
|
|
|
|
// First pass for line wrapping and minimum size calculation.
|
|
for (int i = 0; i < get_child_count(); i++) {
|
|
Control *child = Object::cast_to<Control>(get_child(i));
|
|
if (!child || !child->is_visible()) {
|
|
continue;
|
|
}
|
|
if (child->is_set_as_toplevel()) {
|
|
continue;
|
|
}
|
|
|
|
Size2i child_msc = child->get_combined_minimum_size();
|
|
|
|
if (vertical) { /* VERTICAL */
|
|
if (children_in_current_line > 0) {
|
|
ofs.y += separation_vertical;
|
|
}
|
|
if (ofs.y + child_msc.y > current_container_size) {
|
|
line_length = ofs.y - separation_vertical;
|
|
lines_data.push_back(_LineData{ children_in_current_line, line_height, line_length, current_container_size - line_length, line_stretch_ratio_total });
|
|
|
|
// Move in new column (vertical line).
|
|
ofs.x += line_height + separation_horizontal;
|
|
ofs.y = 0;
|
|
line_height = 0;
|
|
line_stretch_ratio_total = 0;
|
|
children_in_current_line = 0;
|
|
}
|
|
|
|
line_height = MAX(line_height, child_msc.x);
|
|
if (child->get_v_size_flags() & SIZE_EXPAND) {
|
|
line_stretch_ratio_total += child->get_stretch_ratio();
|
|
}
|
|
ofs.y += child_msc.y;
|
|
|
|
} else { /* HORIZONTAL */
|
|
if (children_in_current_line > 0) {
|
|
ofs.x += separation_horizontal;
|
|
}
|
|
if (ofs.x + child_msc.x > current_container_size) {
|
|
line_length = ofs.x - separation_horizontal;
|
|
lines_data.push_back(_LineData{ children_in_current_line, line_height, line_length, current_container_size - line_length, line_stretch_ratio_total });
|
|
|
|
// Move in new line.
|
|
ofs.y += line_height + separation_vertical;
|
|
ofs.x = 0;
|
|
line_height = 0;
|
|
line_stretch_ratio_total = 0;
|
|
children_in_current_line = 0;
|
|
}
|
|
|
|
line_height = MAX(line_height, child_msc.y);
|
|
if (child->get_h_size_flags() & SIZE_EXPAND) {
|
|
line_stretch_ratio_total += child->get_stretch_ratio();
|
|
}
|
|
ofs.x += child_msc.x;
|
|
}
|
|
|
|
children_minsize_cache[child] = child_msc;
|
|
children_in_current_line++;
|
|
}
|
|
line_length = vertical ? (ofs.y) : (ofs.x);
|
|
lines_data.push_back(_LineData{ children_in_current_line, line_height, line_length, current_container_size - line_length, line_stretch_ratio_total });
|
|
|
|
// Second pass for in-line expansion and alignment.
|
|
|
|
int current_line_idx = 0;
|
|
int child_idx_in_line = 0;
|
|
|
|
ofs.x = 0;
|
|
ofs.y = 0;
|
|
|
|
for (int i = 0; i < get_child_count(); i++) {
|
|
Control *child = Object::cast_to<Control>(get_child(i));
|
|
if (!child || !child->is_visible()) {
|
|
continue;
|
|
}
|
|
if (child->is_set_as_toplevel()) {
|
|
continue;
|
|
}
|
|
Size2i child_size = children_minsize_cache[child];
|
|
|
|
_LineData line_data = lines_data[current_line_idx];
|
|
if (child_idx_in_line >= lines_data[current_line_idx].child_count) {
|
|
current_line_idx++;
|
|
child_idx_in_line = 0;
|
|
if (vertical) {
|
|
ofs.x += line_data.min_line_height + separation_horizontal;
|
|
ofs.y = 0;
|
|
} else {
|
|
ofs.x = 0;
|
|
ofs.y += line_data.min_line_height + separation_vertical;
|
|
}
|
|
line_data = lines_data[current_line_idx];
|
|
}
|
|
|
|
if (vertical) { /* VERTICAL */
|
|
if (child->get_h_size_flags() & (SIZE_FILL | SIZE_SHRINK_CENTER | SIZE_SHRINK_END)) {
|
|
child_size.width = line_data.min_line_height;
|
|
}
|
|
|
|
if (child->get_v_size_flags() & SIZE_EXPAND) {
|
|
int stretch = line_data.stretch_avail * child->get_stretch_ratio() / line_data.stretch_ratio_total;
|
|
child_size.height += stretch;
|
|
}
|
|
|
|
} else { /* HORIZONTAL */
|
|
if (child->get_v_size_flags() & (SIZE_FILL | SIZE_SHRINK_CENTER | SIZE_SHRINK_END)) {
|
|
child_size.height = line_data.min_line_height;
|
|
}
|
|
|
|
if (child->get_h_size_flags() & SIZE_EXPAND) {
|
|
int stretch = line_data.stretch_avail * child->get_stretch_ratio() / line_data.stretch_ratio_total;
|
|
child_size.width += stretch;
|
|
}
|
|
}
|
|
|
|
Rect2 child_rect = Rect2(ofs, child_size);
|
|
fit_child_in_rect(child, child_rect);
|
|
|
|
if (vertical) { /* VERTICAL */
|
|
ofs.y += child_size.height + separation_vertical;
|
|
} else { /* HORIZONTAL */
|
|
ofs.x += child_size.width + separation_horizontal;
|
|
}
|
|
|
|
child_idx_in_line++;
|
|
}
|
|
cached_size = (vertical ? ofs.x : ofs.y) + line_height;
|
|
cached_line_count = lines_data.size();
|
|
}
|
|
|
|
Size2 FlowContainer::get_minimum_size() const {
|
|
Size2i minimum;
|
|
|
|
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 */
|
|
minimum.height = MAX(minimum.height, size.height);
|
|
minimum.width = cached_size;
|
|
|
|
} else { /* HORIZONTAL */
|
|
minimum.width = MAX(minimum.width, size.width);
|
|
minimum.height = cached_size;
|
|
}
|
|
}
|
|
|
|
return minimum;
|
|
}
|
|
|
|
void FlowContainer::_notification(int p_what) {
|
|
switch (p_what) {
|
|
case NOTIFICATION_SORT_CHILDREN: {
|
|
_resort();
|
|
minimum_size_changed();
|
|
} break;
|
|
case NOTIFICATION_THEME_CHANGED: {
|
|
minimum_size_changed();
|
|
} break;
|
|
case NOTIFICATION_TRANSLATION_CHANGED: {
|
|
queue_sort();
|
|
} break;
|
|
}
|
|
}
|
|
|
|
int FlowContainer::get_line_count() const {
|
|
return cached_line_count;
|
|
}
|
|
|
|
FlowContainer::FlowContainer(bool p_vertical) {
|
|
vertical = p_vertical;
|
|
}
|
|
|
|
void FlowContainer::_bind_methods() {
|
|
ClassDB::bind_method(D_METHOD("get_line_count"), &FlowContainer::get_line_count);
|
|
}
|