1/*
2 src/progressbar.cpp -- Standard widget for visualizing progress
3
4 NanoGUI was developed by Wenzel Jakob <wenzel.jakob@epfl.ch>.
5 The widget drawing code is based on the NanoVG demo application
6 by Mikko Mononen.
7
8 All rights reserved. Use of this source code is governed by a
9 BSD-style license that can be found in the LICENSE.txt file.
10*/
11
12#include <nanogui/progressbar.h>
13#include <nanogui/opengl.h>
14#include <nanogui/serializer/core.h>
15
16NAMESPACE_BEGIN(nanogui)
17
18ProgressBar::ProgressBar(Widget *parent)
19 : Widget(parent), mValue(0.0f) {}
20
21Vector2i ProgressBar::preferredSize(NVGcontext *) const {
22 return Vector2i(70, 12);
23}
24
25void ProgressBar::draw(NVGcontext* ctx) {
26 Widget::draw(ctx);
27
28 NVGpaint paint = nvgBoxGradient(
29 ctx, mPos.x() + 1, mPos.y() + 1,
30 mSize.x()-2, mSize.y(), 3, 4, Color(0, 32), Color(0, 92));
31 nvgBeginPath(ctx);
32 nvgRoundedRect(ctx, mPos.x(), mPos.y(), mSize.x(), mSize.y(), 3);
33 nvgFillPaint(ctx, paint);
34 nvgFill(ctx);
35
36 float value = std::min(std::max(0.0f, mValue), 1.0f);
37 int barPos = (int) std::round((mSize.x() - 2) * value);
38
39 paint = nvgBoxGradient(
40 ctx, mPos.x(), mPos.y(),
41 barPos+1.5f, mSize.y()-1, 3, 4,
42 Color(220, 100), Color(128, 100));
43
44 nvgBeginPath(ctx);
45 nvgRoundedRect(
46 ctx, mPos.x()+1, mPos.y()+1,
47 barPos, mSize.y()-2, 3);
48 nvgFillPaint(ctx, paint);
49 nvgFill(ctx);
50}
51
52void ProgressBar::save(Serializer &s) const {
53 Widget::save(s);
54 s.set("value", mValue);
55}
56
57bool ProgressBar::load(Serializer &s) {
58 if (!Widget::load(s))
59 return false;
60 if (!s.get("value", mValue))
61 return false;
62 return true;
63}
64
65NAMESPACE_END(nanogui)
66