toolbar_layout_delegate.hpp

/*
 * SPDX-FileCopyrightText: 2020 Arjen Hiemstra <ahiemstra@heimr.nl>
 *
 * SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
 *
 * Private header — internal helper for ToolBarLayout. Not installed, not part of public API.
 */
 
#pragma once
 
#include <QQmlIncubator>
#include <QQuickItem>
 
#include "qml_material/layout/toolbar_layout.hpp"
 
namespace qml_material
{
 
class ToolBarDelegateIncubator : public QQmlIncubator {
public:
    ToolBarDelegateIncubator(QQmlComponent* component, QQmlContext* context);
 
    void setStateCallback(std::function<void(QQuickItem*)> callback);
    void setCompletedCallback(std::function<void(ToolBarDelegateIncubator*)> callback);
 
    void create();
 
    bool isFinished();
 
private:
    void setInitialState(QObject* object) override;
    void statusChanged(QQmlIncubator::Status status) override;
 
    QQmlComponent*                                 m_component;
    QQmlContext*                                   m_context;
    std::function<void(QQuickItem*)>               m_stateCallback;
    std::function<void(ToolBarDelegateIncubator*)> m_completedCallback;
    bool                                           m_finished = false;
};
 
class ToolBarLayoutDelegate : public QObject {
    Q_OBJECT
public:
    ToolBarLayoutDelegate(ToolBarLayout* parent);
    ~ToolBarLayoutDelegate() override;
 
    Action* action() const;
    void    setAction(Action* action);
    void    createItems(QQmlComponent* fullComponent, QQmlComponent* iconComponent,
                        std::function<void(QQuickItem*)> callback);
 
    bool isReady() const;
    bool isActionVisible() const;
    bool isHidden() const;
    bool isIconOnly() const;
    bool isKeepVisible() const;
 
    bool isVisible() const;
 
    void hide();
    void showIcon();
    void showFull();
    void show();
 
    void setPosition(qreal x, qreal y);
    void setHeight(qreal height);
    void resetHeight();
 
    qreal width() const;
    qreal height() const;
    qreal implicitWidth() const;
    qreal implicitHeight() const;
    qreal maxHeight() const;
    qreal iconWidth() const;
    qreal fullWidth() const;
 
private:
    Q_SLOT void actionVisibleChanged();
    Q_SLOT void displayHintChanged();
    inline void ensureItemVisibility() {
        if (m_full) {
            m_full->setVisible(m_fullVisible);
        }
        if (m_icon) {
            m_icon->setVisible(m_iconVisible);
        }
    }
    void cleanupIncubators();
    void triggerRelayout();
 
    ToolBarLayout*            m_parent        = nullptr;
    Action*                   m_action        = nullptr;
    QQuickItem*               m_full          = nullptr;
    QQuickItem*               m_icon          = nullptr;
    ToolBarDelegateIncubator* m_fullIncubator = nullptr;
    ToolBarDelegateIncubator* m_iconIncubator = nullptr;
 
    ToolBarLayout::DisplayHints m_displayHint   = ToolBarLayout::NoPreference;
    bool                        m_ready         = false;
    bool                        m_actionVisible = true;
    bool                        m_fullVisible   = false;
    bool                        m_iconVisible   = false;
};
 
} // namespace qml_material