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annotate include/gui/widgets/graph.h @ 171:03b444cbe55f

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graph: improve? drawing the text dark stylesheet: add borders on QMenu, taking inspiration from MPC-HC media: fix warning about missing enums
author Paper <mrpapersonic@gmail.com>
date Mon, 27 Nov 2023 13:51:27 -0500
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children 45a0967485f1
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1 #ifndef __gui__widgets__graph_h
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2 #define __gui__widgets__graph_h
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4 /* This class is defined as a template, so that means everything gets defined here as well :) */
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6 #include <QWidget>
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7 #include <QDebug>
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8 #include <QSize>
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9 #include <QPaintEvent>
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10 #include <QSize>
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11 #include <QRect>
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12 #include <QPainter>
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13 #include <QPainterPath>
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14 #include <QPen>
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15 #include <algorithm>
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16 #include <unordered_map>
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18 template<typename T>
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19 class Graph final : public QWidget {
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20 public:
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21 Graph(QWidget* parent = nullptr) : QWidget(parent) {};
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22 void AddItem(T key, unsigned long val) { map[key] = val; update(); updateGeometry(); };
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23 void Clear() { map.clear(); update(); updateGeometry(); };
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25 protected:
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26 static constexpr int SPACING = 5;
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28 std::unordered_map<T, unsigned long> map = {};
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30 QSize minimumSizeHint() const override {
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31 QFontMetrics metric(font());
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32 /* wtf?... */
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33 return QSize(100, metric.height() * map.size() + (2 * (map.size() - 2)));
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34 }
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36 /* helper functions */
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37 inline unsigned long GetTotal() {
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38 unsigned long count = 0;
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39
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40 for (const auto& item : map)
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41 count += item.second;
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42
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43 return count;
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44 }
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46 inline unsigned long GetTextWidth() {
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47 unsigned long ret = 0;
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48 QFontMetrics metric(font());
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50 for (const auto& item : map) {
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51 unsigned long width = metric.boundingRect(QString::number(item.first)).width();
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52 if (width > ret)
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53 ret = width;
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54 }
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56 return ret;
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57 }
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59 void paintEvent(QPaintEvent* event) override {
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60 const QRect rect = event->rect();
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61 const int height_of_each = QFontMetrics(font()).height();
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62 const int size = GetTotal();
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63 const int text_width = GetTextWidth();
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64 const int x = rect.x();
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65 int y = rect.y();
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67 /* now we do the actual painting */
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68 QPainter painter(this);
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70 for (const auto& item : map) {
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71 painter.drawText(QRect(x + 2, y, text_width - 2, height_of_each), Qt::AlignRight | Qt::AlignVCenter, QString::number(item.first));
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73 if (size) {
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74 painter.save();
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76 QPen pen(Qt::transparent, 0);
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77 painter.setPen(pen);
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79 QPainterPath path;
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80 path.addRect(x + text_width + 2 + SPACING, y, (static_cast<double>(item.second)/size) * (rect.width() - text_width + 2 - SPACING), height_of_each);
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81 painter.fillPath(path, Qt::darkBlue);
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82 painter.drawPath(path);
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84 painter.restore();
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85 }
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87 y += height_of_each + 2;
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88 }
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89 }
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90 };
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92 #endif // __gui__widgets__graph_h