godot/scene/gui/button.cpp

/*************************************************************************/
/*  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 "button.h"
#include "servers/visual_server.h"
#include "print_string.h"
#include "translation.h"


Size2 Button::get_minimum_size() const {

	Size2 minsize=get_font("font")->get_string_size( xl_text );
	if (clip_text)
		minsize.width=0;

	Ref<Texture> _icon;
	if (icon.is_null() && has_icon("icon"))
		_icon=Control::get_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_constant("hseparation");
	}

	return get_stylebox("normal" )->get_minimum_size() + minsize;

}


void Button::_notification(int p_what) {

	if (p_what==NOTIFICATION_TRANSLATION_CHANGED) {

		xl_text=XL_MESSAGE(text);
		minimum_size_changed();
		update();
	}

	if (p_what==NOTIFICATION_DRAW) {

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

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

		Ref<StyleBox> style = get_stylebox("normal");

		switch( get_draw_mode() ) {

			case DRAW_NORMAL: {

				style = get_stylebox("normal");
				if (!flat)
					style->draw(  ci, Rect2(Point2(0,0), size) );
				color=get_color("font_color");
			} break;
			case DRAW_PRESSED: {

				style = get_stylebox("pressed");
				style->draw(  ci, Rect2(Point2(0,0), size) );
				if (has_color("font_color_pressed"))
					color=get_color("font_color_pressed");
				else
					color=get_color("font_color");

			} break;
			case DRAW_HOVER: {

				style = get_stylebox("hover");
				style->draw(  ci, Rect2(Point2(0,0), size) );
				color=get_color("font_color_hover");

			} break;
			case DRAW_DISABLED: {

				style = get_stylebox("disabled");
				style->draw(  ci, Rect2(Point2(0,0), size) );
				color=get_color("font_color_disabled");

			} break;
		}

		if (has_focus()) {

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

		Ref<Font> font=get_font("font");
		Ref<Texture> _icon;
		if (icon.is_null() && has_icon("icon"))
			_icon=Control::get_icon("icon");
		else
			_icon=icon;

		Point2 icon_ofs = (!_icon.is_null())?Point2( _icon->get_width() + get_constant("hseparation"), 0):Point2();
		int text_clip=size.width - style->get_minimum_size().width - icon_ofs.width;
		Point2 text_ofs = (size - style->get_minimum_size() - icon_ofs - font->get_string_size( xl_text ) )/2.0;

		switch(align) {
			case ALIGN_LEFT: {
				text_ofs.x = style->get_margin(MARGIN_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: {
				text_ofs.x=size.x - style->get_margin(MARGIN_RIGHT) - font->get_string_size( xl_text ).x;
				text_ofs.y+=style->get_offset().y;
			} break;
		}


		text_ofs.y+=font->get_ascent();
		font->draw( ci, text_ofs.floor(), xl_text, color,clip_text?text_clip:-1);
		if (!_icon.is_null()) {

			int valign = size.height-style->get_minimum_size().y;

			_icon->draw(ci,style->get_offset()+Point2(0, Math::floor( (valign-_icon->get_height())/2.0 ) ),is_disabled()?Color(1,1,1,0.4):Color(1,1,1) );
		}



	}
}

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

	if (text==p_text)
		return;
	text=p_text;
	xl_text=XL_MESSAGE(p_text);
	update();
	_change_notify("text");
	minimum_size_changed();
}
String Button::get_text() const {

	return text;
}


void Button::set_icon(const Ref<Texture>& p_icon) {

	if (icon==p_icon)
		return;
	icon=p_icon;
	update();
	_change_notify("icon");
	minimum_size_changed();
}

Ref<Texture> Button::get_icon() const {

	return icon;
}

void Button::set_flat(bool 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) {

	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) {

	align=p_align;
	update();
}

Button::TextAlign Button::get_text_align() const {

	return align;
}

void Button::_bind_methods() {

	ClassDB::bind_method(_MD("set_text","text"),&Button::set_text);
	ClassDB::bind_method(_MD("get_text"),&Button::get_text);
	ClassDB::bind_method(_MD("set_button_icon","texture:Texture"),&Button::set_icon);
	ClassDB::bind_method(_MD("get_button_icon:Texture"),&Button::get_icon);
	ClassDB::bind_method(_MD("set_flat","enabled"),&Button::set_flat);
	ClassDB::bind_method(_MD("set_clip_text","enabled"),&Button::set_clip_text);
	ClassDB::bind_method(_MD("get_clip_text"),&Button::get_clip_text);
	ClassDB::bind_method(_MD("set_text_align","align"),&Button::set_text_align);
	ClassDB::bind_method(_MD("get_text_align"),&Button::get_text_align);
	ClassDB::bind_method(_MD("is_flat"),&Button::is_flat);

	BIND_CONSTANT( ALIGN_LEFT );
	BIND_CONSTANT( ALIGN_CENTER );
	BIND_CONSTANT( ALIGN_RIGHT );

	ADD_PROPERTYNZ( PropertyInfo( Variant::STRING, "text", PROPERTY_HINT_NONE,"",PROPERTY_USAGE_DEFAULT_INTL ), "set_text","get_text") ;
	ADD_PROPERTYNZ( PropertyInfo( Variant::OBJECT, "icon", PROPERTY_HINT_RESOURCE_TYPE, "Texture" ), "set_button_icon","get_button_icon") ;
	ADD_PROPERTY( PropertyInfo( Variant::BOOL, "flat" ), "set_flat","is_flat") ;
	ADD_PROPERTYNZ( PropertyInfo( Variant::BOOL, "clip_text" ), "set_clip_text","get_clip_text") ;
	ADD_PROPERTYNO( PropertyInfo( Variant::INT, "align",PROPERTY_HINT_ENUM,"Left,Center,Right" ), "set_text_align","get_text_align") ;

}

Button::Button(const String &p_text) {

	flat=false;
	clip_text=false;
	set_mouse_filter(MOUSE_FILTER_STOP);
	set_text(p_text);
	align=ALIGN_CENTER;
}


Button::~Button()
{
}