godot/scene/gui/check_button.cpp

/*************************************************************************/
/*  check_button.cpp                                                     */
/*************************************************************************/
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/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
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#include "check_button.h"

#include "core/string/print_string.h"
#include "servers/rendering_server.h"

Size2 CheckButton::get_icon_size() const {
	Ref<Texture2D> on = Control::get_theme_icon(is_disabled() ? "on_disabled" : "on");
	Ref<Texture2D> off = Control::get_theme_icon(is_disabled() ? "off_disabled" : "off");
	Size2 tex_size = Size2(0, 0);
	if (!on.is_null()) {
		tex_size = Size2(on->get_width(), on->get_height());
	}
	if (!off.is_null()) {
		tex_size = Size2(MAX(tex_size.width, off->get_width()), MAX(tex_size.height, off->get_height()));
	}

	return tex_size;
}

Size2 CheckButton::get_minimum_size() const {
	Size2 minsize = Button::get_minimum_size();
	Size2 tex_size = get_icon_size();
	minsize.width += tex_size.width;
	if (get_text().length() > 0) {
		minsize.width += get_theme_constant(SNAME("hseparation"));
	}
	Ref<StyleBox> sb = get_theme_stylebox(SNAME("normal"));
	minsize.height = MAX(minsize.height, tex_size.height + sb->get_margin(SIDE_TOP) + sb->get_margin(SIDE_BOTTOM));

	return minsize;
}

void CheckButton::_notification(int p_what) {
	if ((p_what == NOTIFICATION_THEME_CHANGED) || (p_what == NOTIFICATION_LAYOUT_DIRECTION_CHANGED) || (p_what == NOTIFICATION_TRANSLATION_CHANGED)) {
		if (is_layout_rtl()) {
			_set_internal_margin(SIDE_LEFT, get_icon_size().width);
			_set_internal_margin(SIDE_RIGHT, 0.f);
		} else {
			_set_internal_margin(SIDE_LEFT, 0.f);
			_set_internal_margin(SIDE_RIGHT, get_icon_size().width);
		}
	} else if (p_what == NOTIFICATION_DRAW) {
		RID ci = get_canvas_item();
		bool rtl = is_layout_rtl();

		Ref<Texture2D> on;
		if (rtl) {
			on = Control::get_theme_icon(is_disabled() ? "on_disabled_mirrored" : "on_mirrored");
		} else {
			on = Control::get_theme_icon(is_disabled() ? "on_disabled" : "on");
		}
		Ref<Texture2D> off;
		if (rtl) {
			off = Control::get_theme_icon(is_disabled() ? "off_disabled_mirrored" : "off_mirrored");
		} else {
			off = Control::get_theme_icon(is_disabled() ? "off_disabled" : "off");
		}

		Ref<StyleBox> sb = get_theme_stylebox(SNAME("normal"));
		Vector2 ofs;
		Size2 tex_size = get_icon_size();

		if (rtl) {
			ofs.x = sb->get_margin(SIDE_LEFT);
		} else {
			ofs.x = get_size().width - (tex_size.width + sb->get_margin(SIDE_RIGHT));
		}
		ofs.y = (get_size().height - tex_size.height) / 2 + get_theme_constant(SNAME("check_vadjust"));

		if (is_pressed()) {
			on->draw(ci, ofs);
		} else {
			off->draw(ci, ofs);
		}
	}
}

CheckButton::CheckButton() {
	set_toggle_mode(true);
	set_text_alignment(HORIZONTAL_ALIGNMENT_LEFT);
	if (is_layout_rtl()) {
		_set_internal_margin(SIDE_LEFT, get_icon_size().width);
	} else {
		_set_internal_margin(SIDE_RIGHT, get_icon_size().width);
	}
}

CheckButton::~CheckButton() {
}