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+@* Graph widget configuration.
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+
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+\noindent There are many features of the graph in Typica which ought to be
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+configurable. Most of these cannot be configured until changes are made to the
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+graph widget. The original motivation for the class comes from a need to
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+configure secondary axes.
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+
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+@<Class declarations@>=
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+class GraphSettingsWidget : public QWidget
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+{
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+ Q_OBJECT
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+ public:
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+ GraphSettingsWidget();
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+};
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+
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+@ At present there are three types of data that the graph might present. This
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+will likely be expanded as support for additional unit types are added.
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+
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+Different measurement categories are presently organized into different tabs.
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+This will potentially need to change later as more features are added and the
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+tab set becomes excessively large but for now this is the best that I can
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+think of. If anybody with UI design experience would like to propose something
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+better I would be glad to consider it.
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+
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+@<GraphSettingsWidget implementation@>=
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+GraphSettingsWidget::GraphSettingsWidget() : QWidget(NULL)
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+{
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+ QTabWidget *graphCategories = new QTabWidget;
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+ GraphSettingsRelativeTab *relative = new GraphSettingsRelativeTab;
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+ graphCategories->addTab(relative, tr("Relative Temperatures"));
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+ QVBoxLayout *layout = new QVBoxLayout;
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+ layout->addWidget(graphCategories);
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+ setLayout(layout);
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+}
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+
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+@ Relative temperature measurements are different from the absolute temperature
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+measurements that fall on the primary axis in that it is likely that negative
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+values will be presented. These may be important and should not be hidden off
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+the bottom of the graph, but the most important values will be in a relatively
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+small range of positive values. The particulars will depend on the settings
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+used to construct the relative values and the style of coffee roasting. It is
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+also possible to disable the graphing of relative temperature measurements.
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+
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+@<Class declarations@>=
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+class GraphSettingsRelativeTab : public QWidget
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+{
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+ Q_OBJECT
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+ public:
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+ GraphSettingsRelativeTab();
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+ public slots:
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+ void updateEnableSetting(bool enable);
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+ void updateColorSetting(const QString &color);
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+ void updateAxisSetting(const QString &gridList);
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+ void updateUnit(int unit);
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+ void showColorPicker();
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+ private:
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+ QLineEdit *colorEdit;
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+};
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+
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+@ The constructor sets up the interface and restores any previous values from
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+settings.
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+
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+@<GraphSettingsWidget implementation@>=
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+GraphSettingsRelativeTab::GraphSettingsRelativeTab() : QWidget(NULL),
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+ colorEdit(new QLineEdit)
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+{
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+ QSettings settings;
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+ QVBoxLayout *layout = new QVBoxLayout;
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+ QCheckBox *enable = new QCheckBox(tr("Graph relative temperatures"));
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+ enable->setChecked(settings.value("settings/graph/relative/enable", true).toBool());
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+ updateEnableSetting(enable->isChecked());
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+ connect(enable, SIGNAL(toggled(bool)), this, SLOT(updateEnableSetting(bool)));
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+ layout->addWidget(enable);
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+ QHBoxLayout *colorLayout = new QHBoxLayout;
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+ QLabel *colorLabel = new QLabel(tr("Axis color:"));
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+ colorEdit->setText(settings.value("settings/graph/relative/color", "#000000").toString());
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+ updateColorSetting(colorEdit->text());
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+ connect(colorEdit, SIGNAL(textChanged(QString)), this, SLOT(updateColorSetting(QString)));
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+ QToolButton *colorPickerButton = new QToolButton();
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+ colorPickerButton->setIcon(QIcon::fromTheme("applications-graphics"));
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+ connect(colorPickerButton, SIGNAL(clicked()), this, SLOT(showColorPicker()));
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+ colorLayout->addWidget(colorLabel);
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+ colorLayout->addWidget(colorEdit);
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+ colorLayout->addWidget(colorPickerButton);
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+ colorLayout->addStretch();
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+ layout->addLayout(colorLayout);
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+ QHBoxLayout *unitLayout = new QHBoxLayout;
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+ QLabel *unitLabel = new QLabel(tr("Unit"));
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+ QComboBox *unitSelector = new QComboBox;
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+ unitSelector->addItem(tr("Fahrenheit"));
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+ unitSelector->addItem(tr("Celsius"));
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+ unitSelector->setCurrentIndex(settings.value("settings/graph/relative/unit", 0).toInt());
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+ updateUnit(unitSelector->currentIndex());
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+ connect(unitSelector, SIGNAL(currentIndexChanged(int)), this, SLOT(updateUnit(int)));
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+ unitLayout->addWidget(unitLabel);
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+ unitLayout->addWidget(unitSelector);
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+ unitLayout->addStretch();
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+ layout->addLayout(unitLayout);
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+ QHBoxLayout *axisLayout = new QHBoxLayout;
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+ QLabel *axisLabel = new QLabel(tr("Grid line positions (comma separated):"));
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+ QLineEdit *axisEdit = new QLineEdit;
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+ axisEdit->setText(settings.value("settings/graph/relative/grid", "-300, -100, -10, 0, 10, 30, 50").toString());
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+ updateAxisSetting(axisEdit->text());
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+ connect(axisEdit, SIGNAL(textChanged(QString)), this, SLOT(updateAxisSetting(QString)));
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+ axisLayout->addWidget(axisLabel);
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+ axisLayout->addWidget(axisEdit);
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+ layout->addLayout(axisLayout);
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+ layout->addStretch();
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+ setLayout(layout);
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+}
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+
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+@ A set of methods updates the settings as they are adjusted.
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+
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+@<GraphSettingsWidget implementation@>=
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+void GraphSettingsRelativeTab::updateEnableSetting(bool enabled)
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+{
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+ QSettings settings;
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+ settings.setValue("settings/graph/relative/enable", enabled);
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+}
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+
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+void GraphSettingsRelativeTab::updateColorSetting(const QString &color)
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+{
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+ QSettings settings;
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+ settings.setValue("settings/graph/relative/color", color);
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+}
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+
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+void GraphSettingsRelativeTab::updateAxisSetting(const QString &gridList)
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+{
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+ QSettings settings;
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+ QString settingValue;
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+ QStringList points = gridList.split(QRegExp("[\\s,]+"), QString::SkipEmptyParts);
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+ QStringList numbers;
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+ foreach(QString text, points)
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+ {
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+ bool okay = false;
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+ text.toDouble(&okay);
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+ if(okay)
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+ {
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+ numbers.append(text);
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+ }
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+ }
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+ numbers.removeDuplicates();
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+ settings.setValue("settings/graph/relative/grid", numbers.join(","));
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+}
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+
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+void GraphSettingsRelativeTab::updateUnit(int unit)
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+{
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+ QSettings settings;
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+ settings.setValue("settings/graph/relative/unit", unit);
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+}
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+
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+@ When selecting a color, it is possible to either type the color into the line
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+edit directly or use a color picker to select the color graphically. A tool
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+button displays a color picker and pushes the selected color into the line edit
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+which in turn updates the setting.
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+
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+@<GraphSettingsWidget implementation@>=
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+void GraphSettingsRelativeTab::showColorPicker()
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+{
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+ QColor color = QColorDialog::getColor(QColor(colorEdit->text()), this);
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+ colorEdit->setText(color.name());
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+}
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Neal Wilson
11 years ago