godot/scene/gui/container.cpp

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/*************************************************************************/
/* container.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
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/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
/* 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. */
/*************************************************************************/
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#include "container.h"
#include "core/message_queue.h"
#include "scene/scene_string_names.h"
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void Container::_child_minsize_changed() {
//Size2 ms = get_combined_minimum_size();
//if (ms.width > get_size().width || ms.height > get_size().height) {
minimum_size_changed();
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queue_sort();
}
void Container::add_child_notify(Node *p_child) {
Control::add_child_notify(p_child);
Control *control = Object::cast_to<Control>(p_child);
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if (!control)
return;
control->connect("size_flags_changed", callable_mp(this, &Container::queue_sort));
control->connect("minimum_size_changed", callable_mp(this, &Container::_child_minsize_changed));
control->connect("visibility_changed", callable_mp(this, &Container::_child_minsize_changed));
minimum_size_changed();
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queue_sort();
}
void Container::move_child_notify(Node *p_child) {
Control::move_child_notify(p_child);
if (!Object::cast_to<Control>(p_child))
return;
minimum_size_changed();
queue_sort();
}
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void Container::remove_child_notify(Node *p_child) {
Control::remove_child_notify(p_child);
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Control *control = Object::cast_to<Control>(p_child);
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if (!control)
return;
control->disconnect("size_flags_changed", callable_mp(this, &Container::queue_sort));
control->disconnect("minimum_size_changed", callable_mp(this, &Container::_child_minsize_changed));
control->disconnect("visibility_changed", callable_mp(this, &Container::_child_minsize_changed));
minimum_size_changed();
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queue_sort();
}
void Container::_sort_children() {
if (!is_inside_tree())
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return;
notification(NOTIFICATION_SORT_CHILDREN);
emit_signal(SceneStringNames::get_singleton()->sort_children);
pending_sort = false;
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}
void Container::fit_child_in_rect(Control *p_child, const Rect2 &p_rect) {
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ERR_FAIL_COND(!p_child);
ERR_FAIL_COND(p_child->get_parent() != this);
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Size2 minsize = p_child->get_combined_minimum_size();
Rect2 r = p_rect;
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if (!(p_child->get_h_size_flags() & SIZE_FILL)) {
r.size.x = minsize.width;
if (p_child->get_h_size_flags() & SIZE_SHRINK_END) {
r.position.x += p_rect.size.width - minsize.width;
} else if (p_child->get_h_size_flags() & SIZE_SHRINK_CENTER) {
r.position.x += Math::floor((p_rect.size.x - minsize.width) / 2);
} else {
r.position.x += 0;
}
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}
if (!(p_child->get_v_size_flags() & SIZE_FILL)) {
r.size.y = minsize.y;
if (p_child->get_v_size_flags() & SIZE_SHRINK_END) {
r.position.y += p_rect.size.height - minsize.height;
} else if (p_child->get_v_size_flags() & SIZE_SHRINK_CENTER) {
r.position.y += Math::floor((p_rect.size.y - minsize.height) / 2);
} else {
r.position.y += 0;
}
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}
for (int i = 0; i < 4; i++)
p_child->set_anchor(Margin(i), ANCHOR_BEGIN);
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p_child->set_position(r.position);
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p_child->set_size(r.size);
p_child->set_rotation(0);
p_child->set_scale(Vector2(1, 1));
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}
void Container::queue_sort() {
if (!is_inside_tree())
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return;
if (pending_sort)
return;
MessageQueue::get_singleton()->push_call(this, "_sort_children");
pending_sort = true;
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}
void Container::_notification(int p_what) {
switch (p_what) {
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case NOTIFICATION_ENTER_TREE: {
pending_sort = false;
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queue_sort();
} break;
case NOTIFICATION_RESIZED: {
queue_sort();
} break;
case NOTIFICATION_THEME_CHANGED: {
queue_sort();
} break;
case NOTIFICATION_VISIBILITY_CHANGED: {
if (is_visible_in_tree()) {
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queue_sort();
}
} break;
}
}
String Container::get_configuration_warning() const {
String warning = Control::get_configuration_warning();
if (get_class() == "Container" && get_script().is_null()) {
if (warning != String()) {
warning += "\n\n";
}
warning += TTR("Container by itself serves no purpose unless a script configures its children placement behavior.\nIf you don't intend to add a script, use a plain Control node instead.");
}
return warning;
}
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void Container::_bind_methods() {
ClassDB::bind_method(D_METHOD("_sort_children"), &Container::_sort_children);
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ClassDB::bind_method(D_METHOD("queue_sort"), &Container::queue_sort);
ClassDB::bind_method(D_METHOD("fit_child_in_rect", "child", "rect"), &Container::fit_child_in_rect);
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BIND_CONSTANT(NOTIFICATION_SORT_CHILDREN);
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ADD_SIGNAL(MethodInfo("sort_children"));
}
Container::Container() {
pending_sort = false;
// All containers should let mouse events pass by default.
set_mouse_filter(MOUSE_FILTER_PASS);
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}