qpathedit.h

#ifndef QPATHEDIT_H
#define QPATHEDIT_H

#include <QWidget>
#include <QLineEdit>
#include <QFileDialog>
#include <QIcon>
#include <QString>
#include <QPointer>

#ifdef DESIGNER_PLUGIN
#include <QDesignerExportWidget>
#define DESIGNER_PLUGIN_EXPORT QDESIGNER_WIDGET_EXPORT
#else
#define DESIGNER_PLUGIN_EXPORT
#endif

class QLineEdit;
class QCompleter;
class PathValidator;
class QFileSystemModel;
class QToolButton;

class DESIGNER_PLUGIN_EXPORT QPathEdit : public QWidget
{
    Q_OBJECT

    Q_PROPERTY(Style style READ style WRITE setStyle)
    Q_PROPERTY(QIcon dialogButtonIcon READ dialogButtonIcon WRITE setDialogButtonIcon RESET resetDialogButtonIcon)
    Q_PROPERTY(PathMode pathMode READ pathMode WRITE setPathMode)
    Q_PROPERTY(QFileDialog::Options dialogOptions READ dialogOptions WRITE setDialogOptions)
    Q_PROPERTY(bool editable READ isEditable WRITE setEditable)
    Q_PROPERTY(bool allowEmptyPath READ isEmptyPathAllowed WRITE setAllowEmptyPath)
    Q_PROPERTY(bool useCompleter READ useCompleter WRITE setUseCompleter)
    Q_PROPERTY(QString defaultDirectory READ defaultDirectory WRITE setDefaultDirectory)
    Q_PROPERTY(QString path READ path WRITE setPath RESET clear NOTIFY pathChanged)
    Q_PROPERTY(QString placeholder READ placeholder WRITE setPlaceholder)
    Q_PROPERTY(QStringList nameFilters READ nameFilters WRITE setNameFilters)
    Q_PROPERTY(QStringList mimeTypeFilters READ mimeTypeFilters WRITE setMimeTypeFilters)

public:
    enum Style {
        SeperatedButton,
        JoinedButton,
        NoButton
    };
    Q_ENUM(Style)

    
    enum PathMode {
        ExistingFile,
        ExistingFolder,
        AnyFile
    };
    Q_ENUM(PathMode)

    
    explicit QPathEdit(QWidget *parent = nullptr, Style style = SeperatedButton);
    explicit QPathEdit(PathMode pathMode, QWidget *parent = nullptr, Style style = SeperatedButton);
    explicit QPathEdit(PathMode pathMode, QString defaultDirectory, QWidget *parent = nullptr, Style style = SeperatedButton);

    PathMode pathMode() const;
    QFileDialog::Options dialogOptions() const;
    bool isEmptyPathAllowed() const;
    QString defaultDirectory() const;
    QString path() const;
    QUrl pathUrl() const;
    QString placeholder() const;
    QStringList nameFilters() const;
    QStringList mimeTypeFilters() const;
    bool isEditable() const;
    bool useCompleter() const;
    Style style() const;
    QIcon dialogButtonIcon() const;

    void setPathMode(PathMode pathMode);
    void setDialogOptions(QFileDialog::Options dialogOptions);
    void setAllowEmptyPath(bool allowEmptyPath);
    void setDefaultDirectory(QString defaultDirectory);
    bool setPath(QString path, bool allowInvalid = false);
    void clear();
    void setPlaceholder(QString placeholder);
    void setNameFilters(QStringList nameFilters);
    void setMimeTypeFilters(QStringList mimeTypeFilters);
    void setEditable(bool editable);
    void setUseCompleter(bool useCompleter);
    void setStyle(Style style, QLineEdit::ActionPosition position = QLineEdit::TrailingPosition);
    void setDialogButtonIcon(const QIcon &icon);
    void resetDialogButtonIcon();

public slots:
    void showDialog();

signals:
    void pathChanged(QString path);

private slots:
    void updateValidInfo(const QString & path = QString());
    void editTextUpdate();

    void dialogFileSelected(const QString & file);

private:
    QLineEdit *edit;
    QCompleter *pathCompleter;
    QFileSystemModel *completerModel;
    PathValidator *pathValidator;
    QFileDialog *dialog;

    QString currentValidPath;
    bool wasPathValid;

    Style uiStyle;
    PathMode mode;
    QString defaultDir;
    bool allowEmpty;

    QToolButton *toolButton;
    QAction *dialogAction;
    bool hasCustomIcon;

    QStringList modelFilters(const QStringList &normalFilters);
    QIcon getDefaultIcon();

    bool eventFilter(QObject *watched, QEvent *event) override;
};

#endif // QPATHEDIT_H