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godot/scene/gui/button.cpp
Rémi Verschelde b5334d14f7
Update copyright statements to 2021 
Happy new year to the wonderful Godot community!

2020 has been a tough year for most of us personally, but a good year for
Godot development nonetheless with a huge amount of work done towards Godot
4.0 and great improvements backported to the long-lived 3.2 branch.

We've had close to 400 contributors to engine code this year, authoring near
7,000 commit! (And that's only for the `master` branch and for the engine code,
there's a lot more when counting docs, demos and other first-party repos.)

Here's to a great year 2021 for all Godot users 🎆
2021-01-01 20:19:21 +01:00

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/*************************************************************************/
/* button.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 "button.h"
#include "core/string/translation.h"
#include "servers/rendering_server.h"
Size2 Button::get_minimum_size() const {
Size2 minsize = text_buf->get_size();
if (clip_text) {
minsize.width = 0;
}
if (!expand_icon) {
Ref<Texture2D> _icon;
if (icon.is_null() && has_theme_icon("icon")) {
_icon = Control::get_theme_icon("icon");
} else {
_icon = icon;
}
if (!_icon.is_null()) {
minsize.height = MAX(minsize.height, _icon->get_height());
minsize.width += _icon->get_width();
if (xl_text != "") {
minsize.width += get_theme_constant("hseparation");
}
}
}
return get_theme_stylebox("normal")->get_minimum_size() + minsize;
}
void Button::_set_internal_margin(Side p_side, float p_value) {
_internal_margin[p_side] = p_value;
}
void Button::_notification(int p_what) {
switch (p_what) {
case NOTIFICATION_LAYOUT_DIRECTION_CHANGED: {
update();
} break;
case NOTIFICATION_TRANSLATION_CHANGED: {
xl_text = tr(text);
_shape();
minimum_size_changed();
update();
} break;
case NOTIFICATION_THEME_CHANGED: {
_shape();
minimum_size_changed();
update();
} break;
case NOTIFICATION_DRAW: {
RID ci = get_canvas_item();
Size2 size = get_size();
Color color;
Color color_icon(1, 1, 1, 1);
Ref<StyleBox> style = get_theme_stylebox("normal");
bool rtl = is_layout_rtl();
switch (get_draw_mode()) {
case DRAW_NORMAL: {
if (rtl && has_theme_stylebox("normal_mirrored")) {
style = get_theme_stylebox("normal_mirrored");
} else {
style = get_theme_stylebox("normal");
}
if (!flat) {
style->draw(ci, Rect2(Point2(0, 0), size));
}
color = get_theme_color("font_color");
if (has_theme_color("icon_color_normal")) {
color_icon = get_theme_color("icon_color_normal");
}
} break;
case DRAW_HOVER_PRESSED: {
if (has_theme_stylebox("hover_pressed") && has_theme_stylebox_override("hover_pressed")) {
if (rtl && has_theme_stylebox("hover_pressed_mirrored")) {
style = get_theme_stylebox("hover_pressed_mirrored");
} else {
style = get_theme_stylebox("hover_pressed");
}
if (!flat) {
style->draw(ci, Rect2(Point2(0, 0), size));
}
if (has_theme_color("font_color_hover_pressed")) {
color = get_theme_color("font_color_hover_pressed");
} else {
color = get_theme_color("font_color");
}
if (has_theme_color("icon_color_hover_pressed")) {
color_icon = get_theme_color("icon_color_hover_pressed");
}
break;
}
[[fallthrough]];
}
case DRAW_PRESSED: {
if (rtl && has_theme_stylebox("pressed_mirrored")) {
style = get_theme_stylebox("pressed_mirrored");
} else {
style = get_theme_stylebox("pressed");
}
if (!flat) {
style->draw(ci, Rect2(Point2(0, 0), size));
}
if (has_theme_color("font_color_pressed")) {
color = get_theme_color("font_color_pressed");
} else {
color = get_theme_color("font_color");
}
if (has_theme_color("icon_color_pressed")) {
color_icon = get_theme_color("icon_color_pressed");
}
} break;
case DRAW_HOVER: {
if (rtl && has_theme_stylebox("hover_mirrored")) {
style = get_theme_stylebox("hover_mirrored");
} else {
style = get_theme_stylebox("hover");
}
if (!flat) {
style->draw(ci, Rect2(Point2(0, 0), size));
}
color = get_theme_color("font_color_hover");
if (has_theme_color("icon_color_hover")) {
color_icon = get_theme_color("icon_color_hover");
}
} break;
case DRAW_DISABLED: {
if (rtl && has_theme_stylebox("disabled_mirrored")) {
style = get_theme_stylebox("disabled_mirrored");
} else {
style = get_theme_stylebox("disabled");
}
if (!flat) {
style->draw(ci, Rect2(Point2(0, 0), size));
}
color = get_theme_color("font_color_disabled");
if (has_theme_color("icon_color_disabled")) {
color_icon = get_theme_color("icon_color_disabled");
}
} break;
}
if (has_focus()) {
Ref<StyleBox> style2 = get_theme_stylebox("focus");
style2->draw(ci, Rect2(Point2(), size));
}
Ref<Texture2D> _icon;
if (icon.is_null() && has_theme_icon("icon")) {
_icon = Control::get_theme_icon("icon");
} else {
_icon = icon;
}
Rect2 icon_region = Rect2();
if (!_icon.is_null()) {
int valign = size.height - style->get_minimum_size().y;
if (is_disabled()) {
color_icon.a = 0.4;
}
float icon_ofs_region = 0;
if (rtl) {
if (_internal_margin[SIDE_RIGHT] > 0) {
icon_ofs_region = _internal_margin[SIDE_RIGHT] + get_theme_constant("hseparation");
}
} else {
if (_internal_margin[SIDE_LEFT] > 0) {
icon_ofs_region = _internal_margin[SIDE_LEFT] + get_theme_constant("hseparation");
}
}
if (expand_icon) {
Size2 _size = get_size() - style->get_offset() * 2;
_size.width -= get_theme_constant("hseparation") + icon_ofs_region;
if (!clip_text) {
_size.width -= text_buf->get_size().width;
}
float icon_width = _icon->get_width() * _size.height / _icon->get_height();
float icon_height = _size.height;
if (icon_width > _size.width) {
icon_width = _size.width;
icon_height = _icon->get_height() * icon_width / _icon->get_width();
}
if (rtl) {
icon_region = Rect2(Point2(size.width - (icon_ofs_region + icon_width + style->get_margin(SIDE_RIGHT)), style->get_margin(SIDE_TOP) + (_size.height - icon_height) / 2), Size2(icon_width, icon_height));
} else {
icon_region = Rect2(style->get_offset() + Point2(icon_ofs_region, (_size.height - icon_height) / 2), Size2(icon_width, icon_height));
}
} else {
if (rtl) {
icon_region = Rect2(Point2(size.width - (icon_ofs_region + _icon->get_size().width + style->get_margin(SIDE_RIGHT)), style->get_margin(SIDE_TOP) + Math::floor((valign - _icon->get_height()) / 2.0)), _icon->get_size());
} else {
icon_region = Rect2(style->get_offset() + Point2(icon_ofs_region, Math::floor((valign - _icon->get_height()) / 2.0)), _icon->get_size());
}
}
}
Point2 icon_ofs = !_icon.is_null() ? Point2(icon_region.size.width + get_theme_constant("hseparation"), 0) : Point2();
int text_clip = size.width - style->get_minimum_size().width - icon_ofs.width;
text_buf->set_width(clip_text ? text_clip : -1);
int text_width = clip_text ? MIN(text_clip, text_buf->get_size().x) : text_buf->get_size().x;
if (_internal_margin[SIDE_LEFT] > 0) {
text_clip -= _internal_margin[SIDE_LEFT] + get_theme_constant("hseparation");
}
if (_internal_margin[SIDE_RIGHT] > 0) {
text_clip -= _internal_margin[SIDE_RIGHT] + get_theme_constant("hseparation");
}
Point2 text_ofs = (size - style->get_minimum_size() - icon_ofs - text_buf->get_size() - Point2(_internal_margin[SIDE_RIGHT] - _internal_margin[SIDE_LEFT], 0)) / 2.0;
switch (align) {
case ALIGN_LEFT: {
if (rtl) {
if (_internal_margin[SIDE_RIGHT] > 0) {
text_ofs.x = size.x - style->get_margin(SIDE_RIGHT) - text_width - _internal_margin[SIDE_RIGHT] - get_theme_constant("hseparation");
} else {
text_ofs.x = size.x - style->get_margin(SIDE_RIGHT) - text_width;
}
} else {
if (_internal_margin[SIDE_LEFT] > 0) {
text_ofs.x = style->get_margin(SIDE_LEFT) + icon_ofs.x + _internal_margin[SIDE_LEFT] + get_theme_constant("hseparation");
} else {
text_ofs.x = style->get_margin(SIDE_LEFT) + icon_ofs.x;
}
}
text_ofs.y += style->get_offset().y;
} break;
case ALIGN_CENTER: {
if (text_ofs.x < 0) {
text_ofs.x = 0;
}
text_ofs += icon_ofs;
text_ofs += style->get_offset();
} break;
case ALIGN_RIGHT: {
if (rtl) {
if (_internal_margin[SIDE_LEFT] > 0) {
text_ofs.x = style->get_margin(SIDE_LEFT) + icon_ofs.x + _internal_margin[SIDE_LEFT] + get_theme_constant("hseparation");
} else {
text_ofs.x = style->get_margin(SIDE_LEFT) + icon_ofs.x;
}
} else {
if (_internal_margin[SIDE_RIGHT] > 0) {
text_ofs.x = size.x - style->get_margin(SIDE_RIGHT) - text_width - _internal_margin[SIDE_RIGHT] - get_theme_constant("hseparation");
} else {
text_ofs.x = size.x - style->get_margin(SIDE_RIGHT) - text_width;
}
}
text_ofs.y += style->get_offset().y;
} break;
}
if (rtl) {
text_ofs.x -= icon_ofs.x;
}
Color font_outline_modulate = get_theme_color("font_outline_modulate");
int outline_size = get_theme_constant("outline_size");
if (outline_size > 0 && font_outline_modulate.a > 0) {
text_buf->draw_outline(ci, text_ofs.floor(), outline_size, font_outline_modulate);
}
text_buf->draw(ci, text_ofs.floor(), color);
if (!_icon.is_null() && icon_region.size.width > 0) {
draw_texture_rect_region(_icon, icon_region, Rect2(Point2(), _icon->get_size()), color_icon);
}
} break;
}
}
void Button::_shape() {
Ref<Font> font = get_theme_font("font");
int font_size = get_theme_font_size("font_size");
text_buf->clear();
if (text_direction == Control::TEXT_DIRECTION_INHERITED) {
text_buf->set_direction(is_layout_rtl() ? TextServer::DIRECTION_RTL : TextServer::DIRECTION_LTR);
} else {
text_buf->set_direction((TextServer::Direction)text_direction);
}
text_buf->add_string(xl_text, font, font_size, opentype_features, (language != "") ? language : TranslationServer::get_singleton()->get_tool_locale());
}
void Button::set_text(const String &p_text) {
if (text != p_text) {
text = p_text;
xl_text = tr(text);
_shape();
update();
_change_notify("text");
minimum_size_changed();
}
}
String Button::get_text() const {
return text;
}
void Button::set_text_direction(Control::TextDirection p_text_direction) {
ERR_FAIL_COND((int)p_text_direction < -1 || (int)p_text_direction > 3);
if (text_direction != p_text_direction) {
text_direction = p_text_direction;
_shape();
update();
}
}
Control::TextDirection Button::get_text_direction() const {
return text_direction;
}
void Button::clear_opentype_features() {
opentype_features.clear();
_shape();
update();
}
void Button::set_opentype_feature(const String &p_name, int p_value) {
int32_t tag = TS->name_to_tag(p_name);
if (!opentype_features.has(tag) || (int)opentype_features[tag] != p_value) {
opentype_features[tag] = p_value;
_shape();
update();
}
}
int Button::get_opentype_feature(const String &p_name) const {
int32_t tag = TS->name_to_tag(p_name);
if (!opentype_features.has(tag)) {
return -1;
}
return opentype_features[tag];
}
void Button::set_language(const String &p_language) {
if (language != p_language) {
language = p_language;
_shape();
update();
}
}
String Button::get_language() const {
return language;
}
void Button::set_icon(const Ref<Texture2D> &p_icon) {
if (icon != p_icon) {
icon = p_icon;
update();
_change_notify("icon");
minimum_size_changed();
}
}
Ref<Texture2D> Button::get_icon() const {
return icon;
}
void Button::set_expand_icon(bool p_expand_icon) {
if (expand_icon != p_expand_icon) {
expand_icon = p_expand_icon;
update();
minimum_size_changed();
}
}
bool Button::is_expand_icon() const {
return expand_icon;
}
void Button::set_flat(bool p_flat) {
if (flat != p_flat) {
flat = p_flat;
update();
_change_notify("flat");
}
}
bool Button::is_flat() const {
return flat;
}
void Button::set_clip_text(bool p_clip_text) {
if (clip_text != p_clip_text) {
clip_text = p_clip_text;
update();
minimum_size_changed();
}
}
bool Button::get_clip_text() const {
return clip_text;
}
void Button::set_text_align(TextAlign p_align) {
if (align != p_align) {
align = p_align;
update();
}
}
Button::TextAlign Button::get_text_align() const {
return align;
}
bool Button::_set(const StringName &p_name, const Variant &p_value) {
String str = p_name;
if (str.begins_with("opentype_features/")) {
String name = str.get_slicec('/', 1);
int32_t tag = TS->name_to_tag(name);
double value = p_value;
if (value == -1) {
if (opentype_features.has(tag)) {
opentype_features.erase(tag);
_shape();
update();
}
} else {
if ((double)opentype_features[tag] != value) {
opentype_features[tag] = value;
_shape();
update();
}
}
_change_notify();
return true;
}
return false;
}
bool Button::_get(const StringName &p_name, Variant &r_ret) const {
String str = p_name;
if (str.begins_with("opentype_features/")) {
String name = str.get_slicec('/', 1);
int32_t tag = TS->name_to_tag(name);
if (opentype_features.has(tag)) {
r_ret = opentype_features[tag];
return true;
} else {
r_ret = -1;
return true;
}
}
return false;
}
void Button::_get_property_list(List<PropertyInfo> *p_list) const {
for (const Variant *ftr = opentype_features.next(nullptr); ftr != nullptr; ftr = opentype_features.next(ftr)) {
String name = TS->tag_to_name(*ftr);
p_list->push_back(PropertyInfo(Variant::FLOAT, "opentype_features/" + name));
}
p_list->push_back(PropertyInfo(Variant::NIL, "opentype_features/_new", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_EDITOR));
}
void Button::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_text", "text"), &Button::set_text);
ClassDB::bind_method(D_METHOD("get_text"), &Button::get_text);
ClassDB::bind_method(D_METHOD("set_text_direction", "direction"), &Button::set_text_direction);
ClassDB::bind_method(D_METHOD("get_text_direction"), &Button::get_text_direction);
ClassDB::bind_method(D_METHOD("set_opentype_feature", "tag", "value"), &Button::set_opentype_feature);
ClassDB::bind_method(D_METHOD("get_opentype_feature", "tag"), &Button::get_opentype_feature);
ClassDB::bind_method(D_METHOD("clear_opentype_features"), &Button::clear_opentype_features);
ClassDB::bind_method(D_METHOD("set_language", "language"), &Button::set_language);
ClassDB::bind_method(D_METHOD("get_language"), &Button::get_language);
ClassDB::bind_method(D_METHOD("set_button_icon", "texture"), &Button::set_icon);
ClassDB::bind_method(D_METHOD("get_button_icon"), &Button::get_icon);
ClassDB::bind_method(D_METHOD("set_expand_icon"), &Button::set_expand_icon);
ClassDB::bind_method(D_METHOD("is_expand_icon"), &Button::is_expand_icon);
ClassDB::bind_method(D_METHOD("set_flat", "enabled"), &Button::set_flat);
ClassDB::bind_method(D_METHOD("set_clip_text", "enabled"), &Button::set_clip_text);
ClassDB::bind_method(D_METHOD("get_clip_text"), &Button::get_clip_text);
ClassDB::bind_method(D_METHOD("set_text_align", "align"), &Button::set_text_align);
ClassDB::bind_method(D_METHOD("get_text_align"), &Button::get_text_align);
ClassDB::bind_method(D_METHOD("is_flat"), &Button::is_flat);
BIND_ENUM_CONSTANT(ALIGN_LEFT);
BIND_ENUM_CONSTANT(ALIGN_CENTER);
BIND_ENUM_CONSTANT(ALIGN_RIGHT);
ADD_PROPERTY(PropertyInfo(Variant::STRING, "text", PROPERTY_HINT_MULTILINE_TEXT, "", PROPERTY_USAGE_DEFAULT_INTL), "set_text", "get_text");
ADD_PROPERTY(PropertyInfo(Variant::INT, "text_direction", PROPERTY_HINT_ENUM, "Auto,LTR,RTL,Inherited"), "set_text_direction", "get_text_direction");
ADD_PROPERTY(PropertyInfo(Variant::STRING, "language"), "set_language", "get_language");
ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "icon", PROPERTY_HINT_RESOURCE_TYPE, "Texture2D"), "set_button_icon", "get_button_icon");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "flat"), "set_flat", "is_flat");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "clip_text"), "set_clip_text", "get_clip_text");
ADD_PROPERTY(PropertyInfo(Variant::INT, "align", PROPERTY_HINT_ENUM, "Left,Center,Right"), "set_text_align", "get_text_align");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "expand_icon"), "set_expand_icon", "is_expand_icon");
}
Button::Button(const String &p_text) {
text_buf.instance();
text_buf->set_flags(TextServer::BREAK_MANDATORY);
flat = false;
clip_text = false;
expand_icon = false;
set_mouse_filter(MOUSE_FILTER_STOP);
set_text(p_text);
align = ALIGN_CENTER;
for (int i = 0; i < 4; i++) {
_internal_margin[i] = 0;
}
}
Button::~Button() {
}
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