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statistics: add a model that describes a list of charts

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Qt's comboboxes are controlled by models, there's no way around
that. To customize the chart-selection widget this must therefore
be abstracted into a model. On the upside, this hopefully can
be used for desktop and mobile.

The model provides icons and paints a warning-symbol on it
if the statistics core code deems the chart to be not recommended.
Notably, when plotting a categorical bar chart against a
numerical value (in such a case histograms are preferred).

Includes a fix for a silly oversight in CMakelist.txt: add the
statstranslations.h header.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2021-01-02 22:16:11 +01:00 • committed by Dirk Hohndel
parent fbb17871c9
commit 319a7af31a
3 changed files with 176 additions and 0 deletions
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54
stats/chartlistmodel.h Normal file
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// SPDX-License-Identifier: GPL-2.0
// A model to feed to the chart-selection combobox
#ifndef CHART_LIST_MODEL_H
#define CHART_LIST_MODEL_H
#include "statsstate.h"
#include <vector>
#include <QAbstractListModel>
#include <QString>
#include <QFont>
#include <QIcon>
#include <QPixmap>
class ChartListModel : public QAbstractListModel {
Q_OBJECT
public:
ChartListModel();
~ChartListModel();
// Returns index of selected item
int update(const StatsState::ChartList &charts);
static const constexpr int ChartNameRole = Qt::UserRole + 1;
static const constexpr int IsHeaderRole = Qt::UserRole + 2;
static const constexpr int IconRole = Qt::UserRole + 3;
static const constexpr int IconSizeRole = Qt::UserRole + 4;
private:
struct Item {
bool isHeader;
QString name;
QString fullName;
ChartSubType subtype;
int id;
bool warning;
};
struct SubTypeIcons {
QPixmap normal;
QPixmap warning;
};
QPixmap warningPixmap;
SubTypeIcons subTypeIcons[(size_t)ChartSubType::Count];
QFont itemFont;
QFont headerFont;
std::vector<Item> items;
int rowCount(const QModelIndex &parent) const override;
QVariant data(const QModelIndex &index, int role) const override;
Qt::ItemFlags flags(const QModelIndex &index) const override;
void initIcon(ChartSubType type, const char *name, int iconSize);
const QPixmap &getIcon(ChartSubType type, bool warning) const;
};
#endif