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1 #ifndef __gui__widgets__graph_h
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2 #define __gui__widgets__graph_h
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3 #include <QWidget>
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4 #include <QSize>
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5 #include <QPaintEvent>
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6 #include <QSize>
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7 #include <QRect>
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8 #include <QPainter>
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9 #include <QPainterPath>
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10 #include <QPen>
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11
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12 template <typename T> /* does this even work?? */
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13 class Graph final : public QWidget {
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14 public:
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15 Graph(QWidget* parent = nullptr) : QWidget(parent) {};
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16 void AddItem(T key, int val) { map[key] = val; update(); updateGeometry(); };
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17 void Clear() { map.clear(); update(); updateGeometry(); };
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18
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19 protected:
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20 static constexpr int ITEM_HEIGHT = 20;
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21 static constexpr int TEXT_WIDTH = 30;
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22 inline int GetTotal() {
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23 int count = 0;
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24 for (const auto& item : map)
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25 count += item.second;
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26 return count;
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27 }
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28 QSize minimumSizeHint() const override { return QSize(100, ITEM_HEIGHT * map.size()); };
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29 void paintEvent(QPaintEvent* event) override {
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30 const QRect rect = event->rect();
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31 const int height_of_each = rect.height() / map.size();
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32 const int size = GetTotal();
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33
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34 /* now we do the actual painting */
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35 QPainter painter(this);
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36
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37 int i = 0;
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38 for (const auto& item : map) {
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39 painter.drawText(QRect(0, i*ITEM_HEIGHT, TEXT_WIDTH, ITEM_HEIGHT), Qt::AlignRight | Qt::AlignVCenter, QString::number(item.first));
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40
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41 if (size) {
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42 painter.save();
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43
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44 QPen pen(Qt::transparent, 0);
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45 painter.setPen(pen);
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46
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47 QPainterPath path;
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48 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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49 painter.fillPath(path, Qt::blue);
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50 painter.drawPath(path);
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51
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52 painter.restore();
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53 }
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54 i++;
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55 }
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56 };
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57 std::unordered_map<T, int> map = {};
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58 };
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59
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60 #endif // __gui__widgets__graph_h |
