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annotate include/gui/widgets/graph.h @ 96:bd68e4393e6f

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statistics: forward declare Graph graph: fix missing #include (does this fix the build errors??)
author Paper <mrpapersonic@gmail.com>
date Wed, 01 Nov 2023 15:16:49 -0400
parents 2f373d48f889
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