Mercurial > minori
annotate include/gui/widgets/graph.h @ 367:8d45d892be88 default tip
*: instead of pugixml, use Qt XML features
this means we have one extra Qt dependency though...
| author | Paper <paper@tflc.us> |
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| date | Sun, 17 Nov 2024 22:55:47 -0500 |
| parents | f81bed4e04ac |
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| rev | line source |
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1 #ifndef MINORI_GUI_WIDGETS_GRAPH_H_ |
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2 #define MINORI_GUI_WIDGETS_GRAPH_H_ |
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3 |
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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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5 |
| 102 | 6 #include <QDebug> |
| 93 | 7 #include <QPaintEvent> |
| 8 #include <QPainter> | |
| 9 #include <QPainterPath> | |
| 10 #include <QPen> | |
| 258 | 11 #include <QRect> |
| 12 #include <QSize> | |
| 13 #include <QWidget> | |
| 102 | 14 #include <algorithm> |
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15 #include <unordered_map> |
| 93 | 16 |
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17 template<typename T> |
| 93 | 18 class Graph final : public QWidget { |
| 258 | 19 public: |
| 20 Graph(QWidget* parent = nullptr) : QWidget(parent){}; | |
| 21 void AddItem(T key, unsigned long val) { | |
| 22 map[key] = val; | |
| 23 update(); | |
| 24 updateGeometry(); | |
| 25 }; | |
| 26 void Clear() { | |
| 27 map.clear(); | |
| 28 update(); | |
| 29 updateGeometry(); | |
| 30 }; | |
| 31 | |
| 32 protected: | |
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33 static constexpr int HORIZ_SPACING = 5; |
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34 static constexpr int VERT_SPACING = 3; |
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35 |
| 258 | 36 std::unordered_map<T, unsigned long> map = {}; |
| 93 | 37 |
| 258 | 38 QSize minimumSizeHint() const override { |
| 39 QFontMetrics metric(font()); | |
| 40 /* wtf?... */ | |
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41 return QSize(100, (metric.height() * map.size()) + (VERT_SPACING * map.size())); |
| 258 | 42 } |
| 43 | |
| 44 /* helper functions */ | |
| 45 inline unsigned long GetTotal() { | |
| 46 unsigned long count = 0; | |
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47 |
| 258 | 48 for (const auto& item : map) |
| 49 count += item.second; | |
| 50 | |
| 51 return count; | |
| 52 } | |
| 53 | |
| 54 inline unsigned long GetTextWidth() { | |
| 55 unsigned long ret = 0; | |
| 56 QFontMetrics metric(font()); | |
| 57 | |
| 58 for (const auto& item : map) { | |
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59 unsigned long width = metric.boundingRect(QString::number(item.first)).width(); |
| 258 | 60 if (width > ret) |
| 61 ret = width; | |
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62 } |
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63 |
| 258 | 64 return ret; |
| 65 } | |
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66 |
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67 inline unsigned long GetValueWidth() { |
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68 unsigned long ret = 0; |
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69 QFontMetrics metric(font()); |
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70 |
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71 for (const auto& item : map) { |
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72 unsigned long width = metric.boundingRect(QString::number(item.second)).width(); |
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73 if (width > ret) |
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74 ret = width; |
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75 } |
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76 |
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77 return ret; |
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78 } |
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79 |
| 258 | 80 void paintEvent(QPaintEvent* event) override { |
| 81 /* these are retrieved from the QPaintEvent */ | |
| 82 const QRect rect = event->rect(); | |
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83 const int width = rect.width(); |
| 258 | 84 const int x = rect.x(); |
| 85 int y = rect.y(); | |
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86 |
| 258 | 87 /* these are calculated from font metrics and such */ |
| 88 const int total = GetTotal(); | |
| 89 const int text_width = GetTextWidth(); | |
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90 const int value_width = GetValueWidth(); |
| 258 | 91 const int each_height = QFontMetrics(font()).height(); |
| 92 | |
| 93 /* now we do the actual painting */ | |
| 94 QPainter painter(this); | |
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95 |
| 258 | 96 for (const auto& [key, value] : map) { |
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97 int offset = 0; |
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98 |
| 258 | 99 painter.drawText(QRect(x, y, text_width, each_height), Qt::AlignVCenter | Qt::AlignRight, |
| 100 QString::number(key)); | |
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101 |
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102 offset += text_width + HORIZ_SPACING; |
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103 |
| 258 | 104 /* only draw this if we actually have any data */ |
| 105 if (total) { | |
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106 const int rect_width = (static_cast<double>(value) / total) * (width - offset - HORIZ_SPACING - value_width); |
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107 |
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108 painter.save(); |
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109 |
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110 QPen pen(painter.pen()); |
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111 pen.setStyle(Qt::NoPen); |
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112 painter.setPen(pen); |
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113 |
| 258 | 114 QPainterPath path; |
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115 path.addRect(x + offset, y, rect_width, each_height); |
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116 painter.fillPath(path, Qt::darkGreen); |
| 258 | 117 painter.drawPath(path); |
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118 |
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119 offset += rect_width; |
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120 |
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121 painter.restore(); |
| 102 | 122 } |
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123 |
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124 offset += HORIZ_SPACING; |
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125 |
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126 painter.drawText(QRect(x + offset, y, value_width, each_height), Qt::AlignVCenter | Qt::AlignLeft, QString::number(value)); |
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127 |
| 258 | 128 y += each_height + VERT_SPACING; |
| 102 | 129 } |
| 258 | 130 } |
| 93 | 131 }; |
| 132 | |
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133 #endif // MINORI_GUI_WIDGETS_GRAPH_H_ |