godot/scene/gui/progress_bar.cpp

/*************************************************************************/
/*  progress_bar.cpp                                                     */
/*************************************************************************/
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/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
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#include "progress_bar.h"

Size2 ProgressBar::get_minimum_size() const {
	Ref<StyleBox> bg = get_stylebox("bg");
	Ref<StyleBox> fg = get_stylebox("fg");
	Ref<Font> font = get_font("font");

	Size2 minimum_size = bg->get_minimum_size();
	minimum_size.height = MAX(minimum_size.height, fg->get_minimum_size().height);
	minimum_size.width = MAX(minimum_size.width, fg->get_minimum_size().width);
	if (percent_visible) {
		minimum_size.height = MAX(minimum_size.height, bg->get_minimum_size().height + font->get_height());
	} else { // this is needed, else the progressbar will collapse
		minimum_size.width = MAX(minimum_size.width, 1);
		minimum_size.height = MAX(minimum_size.height, 1);
	}
	return minimum_size;
}

void ProgressBar::_notification(int p_what) {
	if (p_what == NOTIFICATION_DRAW) {
		Ref<StyleBox> bg = get_stylebox("bg");
		Ref<StyleBox> fg = get_stylebox("fg");
		Ref<Font> font = get_font("font");
		Color font_color = get_color("font_color");

		draw_style_box(bg, Rect2(Point2(), get_size()));
		float r = get_as_ratio();
		int mp = fg->get_minimum_size().width;
		int p = r * (get_size().width - mp);
		if (p > 0) {
			draw_style_box(fg, Rect2(Point2(), Size2(p + fg->get_minimum_size().width, get_size().height)));
		}

		if (percent_visible) {
			String txt = itos(int(get_as_ratio() * 100)) + "%";
			font->draw_halign(get_canvas_item(), Point2(0, font->get_ascent() + (get_size().height - font->get_height()) / 2), HALIGN_CENTER, get_size().width, txt, font_color);
		}
	}
}

void ProgressBar::set_percent_visible(bool p_visible) {
	percent_visible = p_visible;
	update();
}

bool ProgressBar::is_percent_visible() const {
	return percent_visible;
}

void ProgressBar::_bind_methods() {
	ClassDB::bind_method(D_METHOD("set_percent_visible", "visible"), &ProgressBar::set_percent_visible);
	ClassDB::bind_method(D_METHOD("is_percent_visible"), &ProgressBar::is_percent_visible);
	ADD_GROUP("Percent", "percent_");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "percent_visible"), "set_percent_visible", "is_percent_visible");
}

ProgressBar::ProgressBar() {
	set_v_size_flags(0);
	set_step(0.01);
	percent_visible = true;
}