elementsdock.h

/*
 * Copyright (c) 2026 Meltytech, LLC
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef ELEMENTSDOCK_H
#define ELEMENTSDOCK_H
 
#include <QColor>
#include <QDir>
#include <QDockWidget>
#include <QIcon>
#include <QModelIndex>
#include <QSize>
 
#include <MltConsumer.h>
 
#include <memory>
 
namespace Mlt {
class Producer;
}
 
class LineEditClear;
class QAbstractItemModel;
class QActionGroup;
class QMimeData;
class QMovie;
class QSortFilterProxyModel;
class QStackedWidget;
class QTimer;
class QWidget;
 
class ElementsModel;
class PlaylistIconView;
 
class ElementsDock : public QDockWidget
{
    Q_OBJECT
 
public:
    enum class Page {
        Emojis = 0,
        Sounds = 1,
        Text = 2,
        Transitions = 3,
        Graphics = 4,
    };
 
    explicit ElementsDock(QWidget *parent = nullptr);
    ~ElementsDock();

    QMimeData *buildMimeData(const QString &sourcePath,
                             const QString &categoryName,
                             bool autoFilter,
                             bool isSoundEffect = false,
                             bool makeUnique = false,
                             QString *destPath = nullptr,
                             bool *didCreate = nullptr);
 
protected:
    void resizeEvent(QResizeEvent *event) override;
    bool eventFilter(QObject *watched, QEvent *event) override;
 
private:
    struct CategoryPage
    {
        QString name;
        bool autoFilter{false}; 
        ElementsModel *model{nullptr};
        QSortFilterProxyModel *proxyModel{nullptr};
        PlaylistIconView *view{nullptr};
    };
 
    struct ElementPolicy
    {
        int pageIndex{-1};
        QString filePath;
        QString categoryName;
        bool autoFilter{false};
        bool isSound{false};
        bool makeUnique{false};
 
        bool valid() const { return pageIndex >= 0 && !filePath.isEmpty(); }
    };
 
    void setupCategoryPage(
        Page page, const QString &name, const QIcon &icon, bool autoFilter, const QDir &dir);
    void setupSearchPage();
    void showSearchOrCategory();
    void connectView(PlaylistIconView *view);
    QModelIndex sourceIndex(const QSortFilterProxyModel *proxy, const QModelIndex &viewIndex) const;
    int pageIndexForModel(const QAbstractItemModel *model) const;
    int pageIndexForView(const PlaylistIconView *view) const;
    ElementPolicy policyFor(const PlaylistIconView *view, const QModelIndex &viewIndex) const;
    void openElement(const ElementPolicy &policy);
    void previewElement(const ElementPolicy &policy);
    void startDrag(PlaylistIconView *view);
    PlaylistIconView *viewForViewport(QObject *watched) const;
    void updateToolbarStyle();
    void stopHoverPreview();
    void stopAudioPreview();
    void startAudioPreview(const QString &filePath);
    void startHoverAnimation(const QModelIndex &sourceIndex, const QString &webpPath);
    QString destPath(const QString &sourcePath, const QString &categoryName) const;
    Mlt::Producer *copyAndCreateProducer(const QString &sourcePath,
                                         const QString &categoryName,
                                         bool autoFilter,
                                         bool isSoundEffect = false,
                                         bool makeUnique = false,
                                         QString *destPath = nullptr,
                                         bool *didCreate = nullptr);
    static void attachSizeFilter(Mlt::Producer *producer, QSize fixedSize = QSize());
    static QIcon makeTextIcon(const QString &text, const QColor &color = QColor());
 
    QWidget *m_categoryToolbar{nullptr};
    LineEditClear *m_searchField{nullptr};
    QActionGroup *m_categoryGroup{nullptr};
    QStackedWidget *m_stack{nullptr};
    QList<CategoryPage> m_pages;
    QSortFilterProxyModel *m_searchProxy{nullptr};
    PlaylistIconView *m_searchView{nullptr};
    int m_searchPageIndex{-1};
    int m_currentPage{0};
 
    QMovie *m_activeMovie{nullptr};
    QTimer *m_previewTimer{nullptr};
    QString m_previewFilePath;
    QPersistentModelIndex m_hoveredProxyIndex;
    QPersistentModelIndex m_hoveredSourceIndex;
    ElementsModel *m_hoveredModel{nullptr};
    QPoint m_dragStartPos;
    std::unique_ptr<Mlt::Consumer> m_audioConsumer;
};
 
#endif // ELEMENTSDOCK_H