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annotate include/gui/widgets/graph.h @ 101:c537996cf67b

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*: multitude of config changes 1. theme is now configurable from the settings menu (but you have to restart for it to apply) 2. config is now stored in an INI file, with no method of conversion from json (this repo is private-ish anyway)
author Paper <mrpapersonic@gmail.com>
date Fri, 03 Nov 2023 14:06:02 -0400
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children b315f3759c56
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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 <QSize>
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8 #include <QPaintEvent>
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9 #include <QSize>
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10 #include <QRect>
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11 #include <QPainter>
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12 #include <QPainterPath>
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13 #include <QPen>
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14 #include <unordered_map>
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16 template <typename T>
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17 class Graph final : public QWidget {
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18 public:
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19 Graph(QWidget* parent = nullptr) : QWidget(parent) {};
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20 void AddItem(T key, int val) { map[key] = val; update(); updateGeometry(); };
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21 void Clear() { map.clear(); update(); updateGeometry(); };
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23 protected:
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24 static constexpr int ITEM_HEIGHT = 20;
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25 static constexpr int TEXT_WIDTH = 30;
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26 inline int GetTotal() {
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27 int count = 0;
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28 for (const auto& item : map)
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29 count += item.second;
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30 return count;
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31 }
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32 QSize minimumSizeHint() const override { return QSize(100, ITEM_HEIGHT * map.size()); };
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33 void paintEvent(QPaintEvent* event) override {
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34 const QRect rect = event->rect();
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35 const int height_of_each = rect.height() / map.size();
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36 const int size = GetTotal();
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38 /* now we do the actual painting */
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39 QPainter painter(this);
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41 int i = 0;
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42 for (const auto& item : map) {
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43 painter.drawText(QRect(rect.x(), rect.y() + i * ITEM_HEIGHT, TEXT_WIDTH, ITEM_HEIGHT), Qt::AlignRight | Qt::AlignVCenter, QString::number(item.first));
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45 if (size) {
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46 painter.save();
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48 QPen pen(Qt::transparent, 0);
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49 painter.setPen(pen);
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51 QPainterPath path;
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52 path.addRect(rect.x()+35, rect.y() + i * ITEM_HEIGHT, (static_cast<double>(item.second)/size)*(rect.width()-35), ITEM_HEIGHT);
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53 painter.fillPath(path, Qt::blue);
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54 painter.drawPath(path);
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56 painter.restore();
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57 }
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58 i++;
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59 }
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60 };
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61 std::unordered_map<T, int> map = {};
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62 };
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64 #endif // __gui__widgets__graph_h