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godot/scene/gui/range.cpp

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/*************************************************************************/
/* range.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2017 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 "range.h"
void Range::_value_changed_notify() {
_value_changed(shared->val);
emit_signal("value_changed", shared->val);
update();
_change_notify("value");
}
void Range::Shared::emit_value_changed() {
for (Set<Range *>::Element *E = owners.front(); E; E = E->next()) {
Range *r = E->get();
if (!r->is_inside_tree())
continue;
r->_value_changed_notify();
}
}
void Range::_changed_notify(const char *p_what) {
emit_signal("changed", shared->val);
update();
_change_notify(p_what);
}
void Range::Shared::emit_changed(const char *p_what) {
for (Set<Range *>::Element *E = owners.front(); E; E = E->next()) {
Range *r = E->get();
if (!r->is_inside_tree())
continue;
r->_changed_notify(p_what);
}
}
void Range::set_value(double p_val) {
if (_rounded_values) {
p_val = Math::round(p_val);
}
if (p_val > shared->max - shared->page)
p_val = shared->max - shared->page;
if (p_val < shared->min)
p_val = shared->min;
if (shared->val == p_val)
return;
shared->val = p_val;
shared->emit_value_changed();
}
void Range::set_min(double p_min) {
shared->min = p_min;
set_value(shared->val);
shared->emit_changed("min");
}
void Range::set_max(double p_max) {
shared->max = p_max;
set_value(shared->val);
shared->emit_changed("max");
}
void Range::set_step(double p_step) {
shared->step = p_step;
shared->emit_changed("step");
}
void Range::set_page(double p_page) {
shared->page = p_page;
set_value(shared->val);
shared->emit_changed("page");
}
double Range::get_value() const {
return shared->val;
}
double Range::get_min() const {
return shared->min;
}
double Range::get_max() const {
return shared->max;
}
double Range::get_step() const {
return shared->step;
}
double Range::get_page() const {
return shared->page;
}
void Range::set_as_ratio(double p_value) {
double v;
if (shared->exp_ratio && get_min() > 0) {
double exp_min = Math::log(get_min()) / Math::log((double)2);
double exp_max = Math::log(get_max()) / Math::log((double)2);
v = Math::pow(2, exp_min + (exp_max - exp_min) * p_value);
} else {
double percent = (get_max() - get_min()) * p_value;
if (get_step() > 0) {
double steps = round(percent / get_step());
v = steps * get_step() + get_min();
} else {
v = percent + get_min();
}
}
set_value(v);
}
double Range::get_as_ratio() const {
if (shared->exp_ratio && get_min() > 0) {
double exp_min = Math::log(get_min()) / Math::log((double)2);
double exp_max = Math::log(get_max()) / Math::log((double)2);
double v = Math::log(get_value()) / Math::log((double)2);
return (v - exp_min) / (exp_max - exp_min);
} else {
return (get_value() - get_min()) / (get_max() - get_min());
}
}
void Range::_share(Node *p_range) {
Range *r = Object::cast_to<Range>(p_range);
ERR_FAIL_COND(!r);
share(r);
}
void Range::share(Range *p_range) {
ERR_FAIL_NULL(p_range);
p_range->_ref_shared(shared);
p_range->_changed_notify();
p_range->_value_changed_notify();
}
void Range::unshare() {
Shared *nshared = memnew(Shared);
nshared->min = shared->min;
nshared->max = shared->max;
nshared->val = shared->val;
nshared->step = shared->step;
nshared->page = shared->page;
_unref_shared();
_ref_shared(nshared);
}
void Range::_ref_shared(Shared *p_shared) {
if (shared && p_shared == shared)
return;
_unref_shared();
shared = p_shared;
shared->owners.insert(this);
}
void Range::_unref_shared() {
shared->owners.erase(this);
if (shared->owners.size() == 0) {
memdelete(shared);
shared = NULL;
}
}
void Range::_bind_methods() {
ClassDB::bind_method(D_METHOD("get_value"), &Range::get_value);
ClassDB::bind_method(D_METHOD("get_min"), &Range::get_min);
ClassDB::bind_method(D_METHOD("get_max"), &Range::get_max);
ClassDB::bind_method(D_METHOD("get_step"), &Range::get_step);
ClassDB::bind_method(D_METHOD("get_page"), &Range::get_page);
ClassDB::bind_method(D_METHOD("get_as_ratio"), &Range::get_as_ratio);
ClassDB::bind_method(D_METHOD("set_value", "value"), &Range::set_value);
ClassDB::bind_method(D_METHOD("set_min", "minimum"), &Range::set_min);
ClassDB::bind_method(D_METHOD("set_max", "maximum"), &Range::set_max);
ClassDB::bind_method(D_METHOD("set_step", "step"), &Range::set_step);
ClassDB::bind_method(D_METHOD("set_page", "pagesize"), &Range::set_page);
ClassDB::bind_method(D_METHOD("set_as_ratio", "value"), &Range::set_as_ratio);
ClassDB::bind_method(D_METHOD("set_use_rounded_values", "enabled"), &Range::set_use_rounded_values);
ClassDB::bind_method(D_METHOD("is_using_rounded_values"), &Range::is_using_rounded_values);
ClassDB::bind_method(D_METHOD("set_exp_ratio", "enabled"), &Range::set_exp_ratio);
ClassDB::bind_method(D_METHOD("is_ratio_exp"), &Range::is_ratio_exp);
ClassDB::bind_method(D_METHOD("share", "with"), &Range::_share);
ClassDB::bind_method(D_METHOD("unshare"), &Range::unshare);
ADD_SIGNAL(MethodInfo("value_changed", PropertyInfo(Variant::REAL, "value")));
ADD_SIGNAL(MethodInfo("changed"));
ADD_PROPERTY(PropertyInfo(Variant::REAL, "min_value"), "set_min", "get_min");
ADD_PROPERTY(PropertyInfo(Variant::REAL, "max_value"), "set_max", "get_max");
ADD_PROPERTY(PropertyInfo(Variant::REAL, "step"), "set_step", "get_step");
ADD_PROPERTY(PropertyInfo(Variant::REAL, "page"), "set_page", "get_page");
ADD_PROPERTY(PropertyInfo(Variant::REAL, "value"), "set_value", "get_value");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "exp_edit"), "set_exp_ratio", "is_ratio_exp");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "rounded"), "set_use_rounded_values", "is_using_rounded_values");
}
void Range::set_use_rounded_values(bool p_enable) {
_rounded_values = p_enable;
}
bool Range::is_using_rounded_values() const {
return _rounded_values;
}
void Range::set_exp_ratio(bool p_enable) {
shared->exp_ratio = p_enable;
}
bool Range::is_ratio_exp() const {
return shared->exp_ratio;
}
Range::Range() {
shared = memnew(Shared);
shared->min = 0;
shared->max = 100;
shared->val = 0;
shared->step = 1;
shared->page = 0;
shared->owners.insert(this);
shared->exp_ratio = false;
_rounded_values = false;
}
Range::~Range() {
_unref_shared();
}
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