comboboxutilities.h

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/* ============================================================
 *
 * This file is a part of digiKam project
 * https://www.digikam.org
 *
 * Date        : 2008-03-14
 * Description : User interface for searches
 *
 * Copyright (C) 2008-2012 by Marcel Wiesweg <marcel dot wiesweg at gmx dot de>
 *
 * 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 2, 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.
 *
 * ============================================================ */
 
#ifndef DIGIKAM_COMBOBOX_UTILITIES_H
#define DIGIKAM_COMBOBOX_UTILITIES_H
 
// Qt includes
 
#include <QLabel>
#include <QListView>
#include <QComboBox>
#include <QPersistentModelIndex>
#include <QLineEdit>
 
// Local includes
 
#include "digikam_export.h"
 
class QVBoxLayout;
class QTreeView;
 
namespace Digikam
{
 
class DIGIKAM_EXPORT ProxyLineEdit : public QLineEdit
{
    Q_OBJECT
 
public:
 
    explicit ProxyLineEdit(QWidget* const parent = nullptr);
 
    virtual void setWidget(QWidget* widget);
 
    void setClearButtonShown(bool show);
 
Q_SIGNALS:
 
    void signalClearButtonPressed();
 
private Q_SLOTS:
 
    void slotTextChanged(const QString& text);
 
protected:
 
    QSize minimumSizeHint() const                   override;
    QSize sizeHint()        const                   override;
 
    void mousePressEvent(QMouseEvent* event)        override;
    void mouseMoveEvent(QMouseEvent* event)         override;
    void mouseReleaseEvent(QMouseEvent* event)      override;
    void mouseDoubleClickEvent(QMouseEvent* event)  override;
    void keyPressEvent(QKeyEvent* event)            override;
    void focusInEvent(QFocusEvent* event)           override;
    void focusOutEvent(QFocusEvent* event)          override;
    void paintEvent(QPaintEvent* event)             override;
    void dragEnterEvent(QDragEnterEvent* event)     override;
    void dragMoveEvent(QDragMoveEvent* e)           override;
    void dragLeaveEvent(QDragLeaveEvent* e)         override;
    void dropEvent(QDropEvent* event)               override;
    void changeEvent(QEvent* event)                 override;
    void contextMenuEvent(QContextMenuEvent* event) override;
    void inputMethodEvent(QInputMethodEvent* event) override;
 
protected:
 
    QWidget*     m_widget;
    QVBoxLayout* m_layout;
};
 
// -------------------------------------------------------------------------
 
class DIGIKAM_EXPORT ProxyClickLineEdit : public ProxyLineEdit
{
    Q_OBJECT
 
public:
 
    explicit ProxyClickLineEdit(QWidget* const parent = nullptr);
 
Q_SIGNALS:
 
    void leftClicked();
 
protected:
 
    void mouseReleaseEvent(QMouseEvent* event) override;
};
 
// -------------------------------------------------------------------------
 
class DIGIKAM_EXPORT ModelIndexBasedComboBox : public QComboBox
{
    Q_OBJECT
 
public:
 
    explicit ModelIndexBasedComboBox(QWidget* const  parent = nullptr);
 
    QModelIndex currentIndex() const;
    void setCurrentIndex(const QModelIndex& index);
 
    void hidePopup() override;
    void showPopup() override;
 
protected:
 
    QPersistentModelIndex m_currentIndex;
};
 
// -------------------------------------------------------------------------
 
class DIGIKAM_EXPORT StayPoppedUpComboBox : public ModelIndexBasedComboBox
{
    Q_OBJECT
 
public:
 
    explicit StayPoppedUpComboBox(QWidget* const parent = nullptr);
 
protected:
 
    void installView(QAbstractItemView* view);
 
    virtual void sendViewportEventToView(QEvent* e) = 0;
 
    bool eventFilter(QObject* watched, QEvent* event) override;
 
protected:
 
    QAbstractItemView* m_view;
};
 
// -------------------------------------------------------------------------
 
class DIGIKAM_EXPORT TreeViewComboBox : public StayPoppedUpComboBox
{
    Q_OBJECT
 
public:
 
    explicit TreeViewComboBox(QWidget* parent = nullptr);
 
    virtual void installView(QAbstractItemView* view = nullptr);
 
    QTreeView* view() const;
 
protected:
 
    void sendViewportEventToView(QEvent* e) override;
};
 
// -------------------------------------------------------------------------
 
class DIGIKAM_EXPORT ListViewComboBox : public StayPoppedUpComboBox
{
    Q_OBJECT
 
public:
 
    explicit ListViewComboBox(QWidget* parent = nullptr);
 
    QListView* view() const;
 
    virtual void installView(QAbstractItemView* view = nullptr);
 
protected:
 
    void sendViewportEventToView(QEvent* e) override;
};
 
// -------------------------------------------------------------------------
 
class DIGIKAM_EXPORT TreeViewLineEditComboBox : public TreeViewComboBox
{
    Q_OBJECT
 
public:
 
    explicit TreeViewLineEditComboBox(QWidget* const parent = nullptr);
 
    void setLineEditText(const QString& text);
 
    void setLineEdit(QLineEdit* edit);
 
    void installView(QAbstractItemView* view = nullptr) override;
 
protected:
 
    virtual void installLineEdit();
 
protected:
 
    QLineEdit* m_comboLineEdit;
};
 
} // namespace Digikam
 
#endif // DIGIKAM_COMBOBOX_UTILITIES_H