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godot/scene/gui/button.cpp

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/*************************************************************************/
/* button.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 "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(SNAME("icon"))) {
_icon = Control::get_theme_icon(SNAME("icon"));
} else {
_icon = icon;
}
if (!_icon.is_null()) {
minsize.height = MAX(minsize.height, _icon->get_height());
if (icon_alignment != HORIZONTAL_ALIGNMENT_CENTER) {
minsize.width += _icon->get_width();
if (!xl_text.is_empty()) {
minsize.width += get_theme_constant(SNAME("h_separation"));
}
} else {
minsize.width = MAX(minsize.width, _icon->get_width());
}
}
}
Ref<Font> font = get_theme_font(SNAME("font"));
float font_height = font->get_height(get_theme_font_size(SNAME("font_size")));
minsize.height = MAX(font_height, minsize.height);
return get_theme_stylebox(SNAME("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 = atr(text);
_shape();
update_minimum_size();
update();
} break;
case NOTIFICATION_THEME_CHANGED: {
_shape();
update_minimum_size();
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(SNAME("normal"));
bool rtl = is_layout_rtl();
switch (get_draw_mode()) {
case DRAW_NORMAL: {
if (rtl && has_theme_stylebox(SNAME("normal_mirrored"))) {
style = get_theme_stylebox(SNAME("normal_mirrored"));
} else {
style = get_theme_stylebox(SNAME("normal"));
}
if (!flat) {
style->draw(ci, Rect2(Point2(0, 0), size));
}
// Focus colors only take precedence over normal state.
if (has_focus()) {
color = get_theme_color(SNAME("font_focus_color"));
if (has_theme_color(SNAME("icon_focus_color"))) {
color_icon = get_theme_color(SNAME("icon_focus_color"));
}
} else {
color = get_theme_color(SNAME("font_color"));
if (has_theme_color(SNAME("icon_normal_color"))) {
color_icon = get_theme_color(SNAME("icon_normal_color"));
}
}
} break;
case DRAW_HOVER_PRESSED: {
// Edge case for CheckButton and CheckBox.
if (has_theme_stylebox("hover_pressed")) {
if (rtl && has_theme_stylebox(SNAME("hover_pressed_mirrored"))) {
style = get_theme_stylebox(SNAME("hover_pressed_mirrored"));
} else {
style = get_theme_stylebox(SNAME("hover_pressed"));
}
if (!flat) {
style->draw(ci, Rect2(Point2(0, 0), size));
}
if (has_theme_color(SNAME("font_hover_pressed_color"))) {
color = get_theme_color(SNAME("font_hover_pressed_color"));
}
if (has_theme_color(SNAME("icon_hover_pressed_color"))) {
color_icon = get_theme_color(SNAME("icon_hover_pressed_color"));
}
break;
}
[[fallthrough]];
}
case DRAW_PRESSED: {
if (rtl && has_theme_stylebox(SNAME("pressed_mirrored"))) {
style = get_theme_stylebox(SNAME("pressed_mirrored"));
} else {
style = get_theme_stylebox(SNAME("pressed"));
}
if (!flat) {
style->draw(ci, Rect2(Point2(0, 0), size));
}
if (has_theme_color(SNAME("font_pressed_color"))) {
color = get_theme_color(SNAME("font_pressed_color"));
} else {
color = get_theme_color(SNAME("font_color"));
}
if (has_theme_color(SNAME("icon_pressed_color"))) {
color_icon = get_theme_color(SNAME("icon_pressed_color"));
}
} break;
case DRAW_HOVER: {
if (rtl && has_theme_stylebox(SNAME("hover_mirrored"))) {
style = get_theme_stylebox(SNAME("hover_mirrored"));
} else {
style = get_theme_stylebox(SNAME("hover"));
}
if (!flat) {
style->draw(ci, Rect2(Point2(0, 0), size));
}
color = get_theme_color(SNAME("font_hover_color"));
if (has_theme_color(SNAME("icon_hover_color"))) {
color_icon = get_theme_color(SNAME("icon_hover_color"));
}
} break;
case DRAW_DISABLED: {
if (rtl && has_theme_stylebox(SNAME("disabled_mirrored"))) {
style = get_theme_stylebox(SNAME("disabled_mirrored"));
} else {
style = get_theme_stylebox(SNAME("disabled"));
}
if (!flat) {
style->draw(ci, Rect2(Point2(0, 0), size));
}
color = get_theme_color(SNAME("font_disabled_color"));
if (has_theme_color(SNAME("icon_disabled_color"))) {
color_icon = get_theme_color(SNAME("icon_disabled_color"));
} else {
color_icon.a = 0.4;
}
} break;
}
if (has_focus()) {
Ref<StyleBox> style2 = get_theme_stylebox(SNAME("focus"));
style2->draw(ci, Rect2(Point2(), size));
}
Ref<Texture2D> _icon;
if (icon.is_null() && has_theme_icon(SNAME("icon"))) {
_icon = Control::get_theme_icon(SNAME("icon"));
} else {
_icon = icon;
}
Rect2 icon_region = Rect2();
HorizontalAlignment icon_align_rtl_checked = icon_alignment;
HorizontalAlignment align_rtl_checked = alignment;
// Swap icon and text alignment sides if right-to-left layout is set.
if (rtl) {
if (icon_alignment == HORIZONTAL_ALIGNMENT_RIGHT) {
icon_align_rtl_checked = HORIZONTAL_ALIGNMENT_LEFT;
} else if (icon_alignment == HORIZONTAL_ALIGNMENT_LEFT) {
icon_align_rtl_checked = HORIZONTAL_ALIGNMENT_RIGHT;
}
if (alignment == HORIZONTAL_ALIGNMENT_RIGHT) {
align_rtl_checked = HORIZONTAL_ALIGNMENT_LEFT;
} else if (alignment == HORIZONTAL_ALIGNMENT_LEFT) {
align_rtl_checked = HORIZONTAL_ALIGNMENT_RIGHT;
}
}
if (!_icon.is_null()) {
int valign = size.height - style->get_minimum_size().y;
float icon_ofs_region = 0.0;
Point2 style_offset;
Size2 icon_size = _icon->get_size();
if (icon_align_rtl_checked == HORIZONTAL_ALIGNMENT_LEFT) {
style_offset.x = style->get_margin(SIDE_LEFT);
if (_internal_margin[SIDE_LEFT] > 0) {
icon_ofs_region = _internal_margin[SIDE_LEFT] + get_theme_constant(SNAME("h_separation"));
}
} else if (icon_align_rtl_checked == HORIZONTAL_ALIGNMENT_CENTER) {
style_offset.x = 0.0;
} else if (icon_align_rtl_checked == HORIZONTAL_ALIGNMENT_RIGHT) {
style_offset.x = -style->get_margin(SIDE_RIGHT);
if (_internal_margin[SIDE_RIGHT] > 0) {
icon_ofs_region = -_internal_margin[SIDE_RIGHT] - get_theme_constant(SNAME("h_separation"));
}
}
style_offset.y = style->get_margin(SIDE_TOP);
if (expand_icon) {
Size2 _size = get_size() - style->get_offset() * 2;
int icon_text_separation = text.is_empty() ? 0 : get_theme_constant(SNAME("h_separation"));
_size.width -= icon_text_separation + icon_ofs_region;
if (!clip_text && icon_align_rtl_checked != HORIZONTAL_ALIGNMENT_CENTER) {
_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();
}
icon_size = Size2(icon_width, icon_height);
}
if (icon_align_rtl_checked == HORIZONTAL_ALIGNMENT_LEFT) {
icon_region = Rect2(style_offset + Point2(icon_ofs_region, Math::floor((valign - icon_size.y) * 0.5)), icon_size);
} else if (icon_align_rtl_checked == HORIZONTAL_ALIGNMENT_CENTER) {
icon_region = Rect2(style_offset + Point2(icon_ofs_region + Math::floor((size.x - icon_size.x) * 0.5), Math::floor((valign - icon_size.y) * 0.5)), icon_size);
} else {
icon_region = Rect2(style_offset + Point2(icon_ofs_region + size.x - icon_size.x, Math::floor((valign - icon_size.y) * 0.5)), icon_size);
}
if (icon_region.size.width > 0) {
draw_texture_rect_region(_icon, icon_region, Rect2(Point2(), _icon->get_size()), color_icon);
}
}
Point2 icon_ofs = !_icon.is_null() ? Point2(icon_region.size.width + get_theme_constant(SNAME("h_separation")), 0) : Point2();
if (align_rtl_checked == HORIZONTAL_ALIGNMENT_CENTER && icon_align_rtl_checked == HORIZONTAL_ALIGNMENT_CENTER) {
icon_ofs.x = 0.0;
}
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 = MAX(1, 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(SNAME("h_separation"));
}
if (_internal_margin[SIDE_RIGHT] > 0) {
text_clip -= _internal_margin[SIDE_RIGHT] + get_theme_constant(SNAME("h_separation"));
}
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;
text_buf->set_alignment(align_rtl_checked);
text_buf->set_width(text_width);
switch (align_rtl_checked) {
case HORIZONTAL_ALIGNMENT_FILL:
case HORIZONTAL_ALIGNMENT_LEFT: {
if (icon_align_rtl_checked != HORIZONTAL_ALIGNMENT_LEFT) {
icon_ofs.x = 0.0;
}
if (_internal_margin[SIDE_LEFT] > 0) {
text_ofs.x = style->get_margin(SIDE_LEFT) + icon_ofs.x + _internal_margin[SIDE_LEFT] + get_theme_constant(SNAME("h_separation"));
} else {
text_ofs.x = style->get_margin(SIDE_LEFT) + icon_ofs.x;
}
text_ofs.y += style->get_offset().y;
} break;
case HORIZONTAL_ALIGNMENT_CENTER: {
if (text_ofs.x < 0) {
text_ofs.x = 0;
}
if (icon_align_rtl_checked == HORIZONTAL_ALIGNMENT_LEFT) {
text_ofs += icon_ofs;
}
text_ofs += style->get_offset();
} break;
case HORIZONTAL_ALIGNMENT_RIGHT: {
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(SNAME("h_separation"));
} else {
text_ofs.x = size.x - style->get_margin(SIDE_RIGHT) - text_width;
}
text_ofs.y += style->get_offset().y;
if (icon_align_rtl_checked == HORIZONTAL_ALIGNMENT_RIGHT) {
text_ofs.x -= icon_ofs.x;
}
} break;
}
Color font_outline_color = get_theme_color(SNAME("font_outline_color"));
int outline_size = get_theme_constant(SNAME("outline_size"));
if (outline_size > 0 && font_outline_color.a > 0) {
text_buf->draw_outline(ci, text_ofs, outline_size, font_outline_color);
}
text_buf->draw(ci, text_ofs, color);
} break;
}
}
void Button::_shape() {
Ref<Font> font = get_theme_font(SNAME("font"));
int font_size = get_theme_font_size(SNAME("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.is_empty()) ? language : TranslationServer::get_singleton()->get_tool_locale());
}
void Button::set_text(const String &p_text) {
if (text != p_text) {
text = p_text;
xl_text = atr(text);
_shape();
update();
update_minimum_size();
}
}
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();
update_minimum_size();
}
}
Ref<Texture2D> Button::get_icon() const {
return icon;
}
void Button::set_expand_icon(bool p_enabled) {
if (expand_icon != p_enabled) {
expand_icon = p_enabled;
update();
update_minimum_size();
}
}
bool Button::is_expand_icon() const {
return expand_icon;
}
void Button::set_flat(bool p_enabled) {
if (flat != p_enabled) {
flat = p_enabled;
update();
}
}
bool Button::is_flat() const {
return flat;
}
void Button::set_clip_text(bool p_enabled) {
if (clip_text != p_enabled) {
clip_text = p_enabled;
update();
update_minimum_size();
}
}
bool Button::get_clip_text() const {
return clip_text;
}
void Button::set_text_alignment(HorizontalAlignment p_alignment) {
if (alignment != p_alignment) {
alignment = p_alignment;
update();
}
}
HorizontalAlignment Button::get_text_alignment() const {
return alignment;
}
void Button::set_icon_alignment(HorizontalAlignment p_alignment) {
icon_alignment = p_alignment;
update_minimum_size();
update();
}
HorizontalAlignment Button::get_icon_alignment() const {
return icon_alignment;
}
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);
int value = p_value;
if (value == -1) {
if (opentype_features.has(tag)) {
opentype_features.erase(tag);
_shape();
update();
}
} else {
if (!opentype_features.has(tag) || (int)opentype_features[tag] != value) {
opentype_features[tag] = value;
_shape();
update();
}
}
notify_property_list_changed();
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::INT, "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_flat", "enabled"), &Button::set_flat);
ClassDB::bind_method(D_METHOD("is_flat"), &Button::is_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_alignment", "alignment"), &Button::set_text_alignment);
ClassDB::bind_method(D_METHOD("get_text_alignment"), &Button::get_text_alignment);
ClassDB::bind_method(D_METHOD("set_icon_alignment", "icon_alignment"), &Button::set_icon_alignment);
ClassDB::bind_method(D_METHOD("get_icon_alignment"), &Button::get_icon_alignment);
ClassDB::bind_method(D_METHOD("set_expand_icon", "enabled"), &Button::set_expand_icon);
ClassDB::bind_method(D_METHOD("is_expand_icon"), &Button::is_expand_icon);
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,Left-to-Right,Right-to-Left,Inherited"), "set_text_direction", "get_text_direction");
ADD_PROPERTY(PropertyInfo(Variant::STRING, "language", PROPERTY_HINT_LOCALE_ID, ""), "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, "alignment", PROPERTY_HINT_ENUM, "Left,Center,Right"), "set_text_alignment", "get_text_alignment");
ADD_PROPERTY(PropertyInfo(Variant::INT, "icon_alignment", PROPERTY_HINT_ENUM, "Left,Center,Right"), "set_icon_alignment", "get_icon_alignment");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "expand_icon"), "set_expand_icon", "is_expand_icon");
}
Button::Button(const String &p_text) {
text_buf.instantiate();
text_buf->set_flags(TextServer::BREAK_MANDATORY);
set_mouse_filter(MOUSE_FILTER_STOP);
set_text(p_text);
}
Button::~Button() {
}
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