| 1 | /* |
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| 2 | This file is part of the KDE project |
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| 3 | SPDX-FileCopyrightText: 2015 Olivier Goffart <ogoffart@woboq.com> |
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| 4 | |
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| 5 | SPDX-License-Identifier: LGPL-2.0-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL |
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| 6 | */ |
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| 7 | |
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| 8 | #ifndef KOVERLAYICONPLUGIN_H |
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| 9 | #define KOVERLAYICONPLUGIN_H |
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| 10 | |
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| 11 | #include "kiocore_export.h" |
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| 12 | #include <QObject> |
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| 13 | |
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| 14 | class QUrl; |
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| 15 | |
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| 16 | /** |
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| 17 | * @class KOverlayIconPlugin koverlayiconplugin.h <KOverlayIconPlugin> |
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| 18 | * |
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| 19 | * @brief Base class for overlay icon plugins. |
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| 20 | * Enables file managers to show custom overlay icons on files. |
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| 21 | * |
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| 22 | * This plugin can be created and installed through kcoreaddons_add_plugin |
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| 23 | * @code |
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| 24 | * kcoreaddons_add_plugin(myoverlayplugin SOURCES myoverlayplugin.cpp INSTALL_NAMESPACE "kf6/overlayicon") |
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| 25 | * target_link_libraries(myoverlayplugin KF6::KIOCore) |
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| 26 | * @endcode |
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| 27 | * The C++ file should look like this: |
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| 28 | * @code |
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| 29 | #include <KOverlayIconPlugin> |
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| 30 | |
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| 31 | class MyOverlayPlugin : public KOverlayIconPlugin |
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| 32 | { |
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| 33 | Q_PLUGIN_METADATA(IID "org.kde.overlayicon.myplugin") |
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| 34 | Q_OBJECT |
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| 35 | |
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| 36 | public: |
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| 37 | MyOverlayPlugin() { |
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| 38 | } |
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| 39 | |
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| 40 | QStringList getOverlays(const QUrl &url) override { |
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| 41 | // Implement your logic |
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| 42 | } |
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| 43 | }; |
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| 44 | |
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| 45 | #include "myoverlayplugin.moc" |
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| 46 | * @endcode |
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| 47 | * @since 5.16 |
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| 48 | */ |
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| 49 | class KIOCORE_EXPORT KOverlayIconPlugin : public QObject |
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| 50 | { |
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| 51 | Q_OBJECT |
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| 52 | public: |
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| 53 | explicit KOverlayIconPlugin(QObject *parent = nullptr); |
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| 54 | ~KOverlayIconPlugin() override; |
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| 55 | |
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| 56 | /** |
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| 57 | * Returns a list of overlay icons to add to a file |
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| 58 | * This can be a path to an icon, or the icon name |
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| 59 | * |
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| 60 | * This function is called from the main thread and must not block. |
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| 61 | * It is recommended to have a cache. And if the item is not in cache |
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| 62 | * just return an empty list and call the overlaysChanged when the |
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| 63 | * information is available. |
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| 64 | */ |
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| 65 | virtual QStringList getOverlays(const QUrl &item) = 0; |
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| 66 | Q_SIGNALS: |
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| 67 | /** |
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| 68 | * Emit this signal when the list of overlay icons changed for a given URL |
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| 69 | */ |
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| 70 | void overlaysChanged(const QUrl &url, const QStringList &overlays); |
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| 71 | }; |
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| 72 | |
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| 73 | #endif |
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| 74 | |
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