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.                 */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
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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("h_separation"));
	}
	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) {
	switch (p_what) {
		case NOTIFICATION_THEME_CHANGED:
		case NOTIFICATION_LAYOUT_DIRECTION_CHANGED:
		case 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);
			}
		} break;

		case 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_v_adjust"));

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

CheckButton::CheckButton(const String &p_text) :
		Button(p_text) {
	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() {
}