main.cpp

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#include "graphics.h"
#include "feature.h"
#include "featuretreemodel.h"

#include <QtGui>

static QString defaultPath;

class FeatureTextBrowser : public QTextBrowser {
    Q_OBJECT
public:
    FeatureTextBrowser(QWidget *parent) : QTextBrowser(parent) {
        QString docRoot;
        docRoot = QLibraryInfo::location(QLibraryInfo::DocumentationPath)
                  + "/html";
        setSearchPaths(searchPaths() << docRoot);
    }

signals:
    void featureClicked(const QString &feature);

public slots:
    void setSource(const QUrl &url)
    {
        if (url.scheme() == "feature")
            emit featureClicked(url.authority());
        else
            QTextBrowser::setSource(url);
    }
};

class Main : public QMainWindow {
    Q_OBJECT
public:
    Main();
    ~Main();
    void loadFeatures(const QString& filename);
    void loadConfig(const QString& filename);

public slots:
    void modelChanged();
    void showInfo(const QModelIndex &index);
    void showInfo(const QString &feature);
    void openConfig();
    void saveConfig();
    void expandView();
    void collapseView();
    void about();
    void aboutQt();
    void quit();
    void clear();
    void enableAll();
    void disableAll();

private:
    QTextBrowser *textBrowser;
    QTreeView *featureTree;
    FeatureTreeModel *featureModel;

    void init();
    void updateStatus(int numFeatures = -1);
    void completelyExpandIndex(const QModelIndex &parent);
};

template<typename Func>
void foreachIndex_helper(const QModelIndex &parent, Func func)
{
    const QAbstractItemModel *model = parent.model();
    const int rows = model->rowCount(parent);
    for (int i = 0; i < rows; ++i) {
        const QModelIndex child = model->index(i, 0, parent);
        func(child);
        foreachIndex_helper(child, func);
    }
}

template<typename Func>
void foreachIndex(const QAbstractItemModel *model, Func func)
{
    const int rows = model->rowCount(QModelIndex());
    for (int i = 0; i < rows; ++i) {
        const QModelIndex child = model->index(i, 0, QModelIndex());
        func(child);
        foreachIndex_helper(child, func);
    }
}

struct CheckStateSetter {

    CheckStateSetter(Qt::CheckState state, QAbstractItemModel *m)
        : checkState(state), model(m) {}

    void operator()(const QModelIndex &index) {
        model->setData(index, checkState, Qt::CheckStateRole);
    }

    Qt::CheckState checkState;
    QAbstractItemModel *model;
};

void Main::disableAll()
{
    QAbstractItemModel *model = featureTree->model();
    foreachIndex(model, CheckStateSetter(Qt::Unchecked, model));
}

void Main::enableAll()
{
    QAbstractItemModel *model = featureTree->model();
    foreachIndex(model, CheckStateSetter(Qt::Checked, model));
}

Main::Main()
{
    setWindowIcon(QIcon(QPixmap(logo_xpm)));

    QSplitter *splitter = new QSplitter(this);

    featureModel = new FeatureTreeModel(this);
    featureTree = new QTreeView(splitter);
    splitter->addWidget(featureTree);
    featureTree->setRootIsDecorated(true);
    featureTree->setModel(featureModel);
    featureTree->show();

    textBrowser = new FeatureTextBrowser(splitter);
    textBrowser->setFrameStyle(QFrame::WinPanel|QFrame::Sunken);
    splitter->addWidget(textBrowser);
    textBrowser->show();

    connect(textBrowser, SIGNAL(featureClicked(const QString&)),
            this, SLOT(showInfo(const QString&)));
    connect(featureTree, SIGNAL(activated(QModelIndex)),
	    this, SLOT(showInfo(QModelIndex)));
    connect(featureModel, SIGNAL(dataChanged(QModelIndex, QModelIndex)),
            this, SLOT(modelChanged()));
    connect(featureTree, SIGNAL(clicked(QModelIndex)),
            this, SLOT(showInfo(QModelIndex)));

    setCentralWidget(splitter);

    QMenu *file = menuBar()->addMenu("&File");
    file->addAction("&Open...", this, SLOT(openConfig()),
                    Qt::CTRL + Qt::Key_O);
    file->addAction("&Save As...", this, SLOT(saveConfig()),
                    Qt::CTRL + Qt::Key_S);
    file->addSeparator();
    file->addAction("&Reset",  this, SLOT(clear()));
    file->addSeparator();
    file->addAction("E&xit",  this, SLOT(quit()), Qt::CTRL + Qt::Key_Q);

    QMenu *edit = menuBar()->addMenu("&Tools");
    edit->addAction("&Enable all features", this, SLOT(enableAll()));
    edit->addAction("&Disable all features", this, SLOT(disableAll()));

    menuBar()->addSeparator();

    QMenu *help = menuBar()->addMenu("&Help");
    help->addAction("&About", this, SLOT(about()));
    help->addAction("About &Qt", this, SLOT(aboutQt()));

    QToolBar *tb = new QToolBar("Expand/Collapse features");
    QToolButton *button;

    button = new QToolButton(tb);
    button->setIcon(QIcon(QPixmap(collapsed_xpm)));
    button->setText("Collapse");
    button->setToolTip("Collapse");
    connect(button, SIGNAL(clicked()), this, SLOT(collapseView()));
    tb->addWidget(button);

    button = new QToolButton(tb);
    button->setIcon(QIcon(QPixmap(expanded_xpm)));
    button->setText("Expand");
    button->setToolTip("Expand");
    connect(button, SIGNAL(clicked()), this, SLOT(expandView()));
    tb->addWidget(button);
    addToolBar(tb);

    init();
}

Main::~Main()
{
    delete textBrowser;
    delete featureModel;
    delete featureTree;
}

void Main::clear()
{
    QSettings settings;
    settings.clear();
    featureModel->clear();
    featureTree->reset();
    init();
}

void Main::quit()
{
    if (isWindowModified()) {
        int button = QMessageBox::question(this, "Quit Program",
                                           "You have unsaved changes.\n"
                                           "Do you want to quit anyway?",
                                           QMessageBox::Yes,
                                           QMessageBox::No);
        if (static_cast<QMessageBox::Button>(button) != QMessageBox::Yes)
            return;
    }
    QApplication::instance()->quit();
}

/*
  Recursively expand expand \a parent and all of its children.
*/
void Main::completelyExpandIndex(const QModelIndex &parent)
{
    featureTree->setExpanded(parent, true);

    const QAbstractItemModel *model = featureTree->model();
    const int rows = model->rowCount(parent);
    for (int i = 0; i < rows; ++i)
        completelyExpandIndex(model->index(i, 0, parent));
}

void Main::expandView()
{
    completelyExpandIndex(QModelIndex());
}

void Main::collapseView()
{
    const QAbstractItemModel *model = featureTree->model();
    const int rows = model->rowCount(QModelIndex());
    for (int i = 0; i < rows; ++i) {
        QModelIndex index = model->index(i, 0, QModelIndex());