godot/scene/gui/link_button.cpp

/*************************************************************************/
/*  link_button.cpp                                                      */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* 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 "link_button.h"


void LinkButton::set_text(const String& p_text) {

	text=p_text;
	update();
	minimum_size_changed();
}

String LinkButton::get_text() const {
	return text;
}

void LinkButton::set_underline_mode(UnderlineMode p_underline_mode) {

	underline_mode=p_underline_mode;
	update();
}

LinkButton::UnderlineMode LinkButton::get_underline_mode() const {

	return underline_mode;
}


Size2 LinkButton::get_minimum_size() const {

	return get_font("font")->get_string_size( text );
}



void LinkButton::_notification(int p_what) {

	switch( p_what ) {

		case NOTIFICATION_DRAW: {


			RID ci = get_canvas_item();
			Size2 size=get_size();
			Color color;
			bool do_underline=false;

			//print_line(get_text()+": "+itos(is_flat())+" hover "+itos(get_draw_mode()));

			switch( get_draw_mode() ) {

				case DRAW_NORMAL: {

					color=get_color("font_color");
					do_underline=underline_mode==UNDERLINE_MODE_ALWAYS;
				} break;
				case DRAW_PRESSED: {

					if (has_color("font_color_pressed"))
						color=get_color("font_color_pressed");
					else
						color=get_color("font_color");

					do_underline=underline_mode!=UNDERLINE_MODE_NEVER;

				} break;
				case DRAW_HOVER: {

					color=get_color("font_color_hover");
					do_underline=underline_mode!=UNDERLINE_MODE_NEVER;

				} break;
				case DRAW_DISABLED: {

					color=get_color("font_color_disabled");
					do_underline=underline_mode==UNDERLINE_MODE_ALWAYS;

				} break;
			}

			if (has_focus()) {

				Ref<StyleBox> style = get_stylebox("focus");
				style->draw(ci,Rect2(Point2(),size));
			}

			Ref<Font> font=get_font("font");

			draw_string(font,Vector2(0,font->get_ascent()),text,color);



			if (do_underline) {
				int underline_spacing = get_constant("underline_spacing");
				int width = font->get_string_size(text).width;
				int y = font->get_ascent()+underline_spacing;

				draw_line(Vector2(0,y),Vector2(width,y),color);
			}

		} break;
	}
}

void LinkButton::_bind_methods() {

	ObjectTypeDB::bind_method(_MD("set_text","text"),&LinkButton::set_text);
	ObjectTypeDB::bind_method(_MD("get_text"),&LinkButton::get_text);

	ObjectTypeDB::bind_method(_MD("set_underline_mode","underline_mode"),&LinkButton::set_underline_mode);
	ObjectTypeDB::bind_method(_MD("get_underline_mode"),&LinkButton::get_underline_mode);


	BIND_CONSTANT( 	UNDERLINE_MODE_ALWAYS );
	BIND_CONSTANT( 	UNDERLINE_MODE_ON_HOVER );
	BIND_CONSTANT( 	UNDERLINE_MODE_NEVER );

	ADD_PROPERTYNZ(PropertyInfo(Variant::STRING,"text"), _SCS("set_text"), _SCS("get_text"));
	ADD_PROPERTYNZ(PropertyInfo(Variant::INT,"underline",PROPERTY_HINT_ENUM,"Always,On Hover,Never"), _SCS("set_underline_mode"), _SCS("get_underline_mode"));

}

LinkButton::LinkButton() {
	underline_mode=UNDERLINE_MODE_ALWAYS;
	set_enabled_focus_mode(FOCUS_NONE);
	set_default_cursor_shape(CURSOR_POINTING_HAND);
}