blame: mainwindow.cpp

#include "mainwindow.h"

#include "imagemodel.h"

#include <QFileSystemModel>

#include <QTreeView>

#include <QListView>

#include <QLabel>

#include <QSplitter>

#include <QDir>

#include <QImageReader>

#include <QHeaderView>

MainWindow::MainWindow(QWidget *parent)

    : QMainWindow(parent)

{

    setupUi();

    setupConnections();

}

void MainWindow::setupUi()

{

    // Folder model (left pane)

    m_dirModel = new QFileSystemModel(this);

    m_dirModel->setFilter(QDir::AllDirs | QDir::NoDotAndDotDot);

    m_dirModel->setRootPath(QDir::homePath());

    m_treeView = new QTreeView;

    m_treeView->setModel(m_dirModel);

    m_treeView->setRootIndex(m_dirModel->index(QDir::homePath()));

    m_treeView->header()->hide();

    m_treeView->setColumnHidden(1, true);

    m_treeView->setColumnHidden(2, true);

    m_treeView->setColumnHidden(3, true);

    // Thumbnail model (center pane)

    m_imageModel = new ImageModel(this);

    m_listView = new QListView;

    m_listView->setModel(m_imageModel);

    m_listView->setViewMode(QListView::IconMode);

    m_listView->setIconSize(QSize(128, 128));

    m_listView->setResizeMode(QListView::Adjust);

    m_listView->setSelectionMode(QAbstractItemView::SingleSelection);

    m_listView->setSpacing(10);

    // Preview pane (right)

    m_previewLabel = new QLabel;

    m_previewLabel->setAlignment(Qt::AlignCenter);

    m_previewLabel->setMinimumWidth(300);

    // Layout

    QSplitter *rightSplitter = new QSplitter(Qt::Horizontal);

    rightSplitter->addWidget(m_listView);

    rightSplitter->addWidget(m_previewLabel);

    rightSplitter->setStretchFactor(0, 3);

    rightSplitter->setStretchFactor(1, 2);

    QSplitter *mainSplitter = new QSplitter(Qt::Horizontal);

    mainSplitter->addWidget(m_treeView);

    mainSplitter->addWidget(rightSplitter);

    mainSplitter->setStretchFactor(1, 1);

    setCentralWidget(mainSplitter);

}

void MainWindow::setupConnections()

{

    connect(m_treeView, &QTreeView::clicked, this,

            [this](const QModelIndex &index)

    {

        QString path = m_dirModel->filePath(index);

        m_imageModel->setDirectory(path);

    });

    connect(m_listView, &QListView::clicked, this,

            [this](const QModelIndex &index)

    {

        QString path = m_imageModel->filePath(index);

        QImageReader reader(path);

        reader.setAutoTransform(true);

        QImage image = reader.read();

        m_previewLabel->setPixmap(

            QPixmap::fromImage(image).scaled(

                m_previewLabel->size(),

                Qt::KeepAspectRatio,

                Qt::SmoothTransformation));

    });

}