AListView.h

/*
 * AUI Framework - Declarative UI toolkit for modern C++20
 * Copyright (C) 2020-2024 Alex2772 and Contributors
 *
 * SPDX-License-Identifier: MPL-2.0
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */
 
#pragma once
 
#include <AUI/Model/AListModelIndex.h>
#include <AUI/Model/AListModelObserver.h>
#include <AUI/Model/AListModelSelection.h>
#include <AUI/Model/IListModel.h>
 
#include "AScrollArea.h"
 
class AListItem;
class AListViewContainer;

class API_AUI_VIEWS AListView : public AScrollArea, public AListModelObserver<AString>::IListModelListener {
    friend class AListItem;
 
   private:
    _<AListViewContainer> mContent;
    ASet<AListModelIndex> mSelectionModel;
    _<AListModelObserver<AString>> mObserver;
    bool mAllowMultipleSelection = false;
 
    void handleMousePressed(AListItem* item);
    void handleMouseDoubleClicked(AListItem* item);
 
    void clearSelectionInternal();
 
   public:
    enum class SelectAction {
        CLEAR_SELECTION_AND_SET,

        SET,

        UNSET,

        TOGGLE,
    };
 
    AListView() : AListView(nullptr) {}
    explicit AListView(const _<IListModel<AString>>& model);
    virtual ~AListView();
 
    void setModel(const _<IListModel<AString>>& model);
 
    void updateSelectionOnItem(size_t i, AListView::SelectAction action);

    void selectItem(size_t i) { updateSelectionOnItem(i, SelectAction::CLEAR_SELECTION_AND_SET); }
 
    int getContentFullHeight() { return getLayout()->getMinimumHeight() + 8; }
 
    void setAllowMultipleSelection(bool allowMultipleSelection);
 
    [[nodiscard]] AListModelSelection<AString> getSelectionModel() const {
        return AListModelSelection<AString>(mSelectionModel, mObserver->getModel());
    }
 
    void insertItem(size_t at, const AString& value) override;
    void updateItem(size_t at, const AString& value) override;
    void removeItem(size_t at) override;
 
    void onDataCountChanged() override;
    void onDataChanged() override;
 
signals:
    emits<AListModelSelection<AString>> selectionChanged;
    emits<unsigned> itemDoubleClicked;
 
    void clearSelection();
};