| 1 | /* |
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| 2 | This file is part of the KDE libraries |
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| 3 | SPDX-FileCopyrightText: 2001 Frerich Raabe <raabe@kde.org> |
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| 4 | SPDX-FileCopyrightText: 2003 Carsten Pfeiffer <pfeiffer@kde.org> |
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| 5 | |
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| 6 | SPDX-License-Identifier: LGPL-2.0-or-later |
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| 7 | */ |
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| 8 | |
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| 9 | #ifndef __KPREVIEWWIDGETBASE_H__ |
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| 10 | #define __KPREVIEWWIDGETBASE_H__ |
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| 11 | |
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| 12 | #include <QWidget> |
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| 13 | |
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| 14 | #include "kiofilewidgets_export.h" |
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| 15 | |
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| 16 | #include <memory> |
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| 17 | |
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| 18 | class QUrl; |
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| 19 | |
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| 20 | /** |
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| 21 | * @class KPreviewWidgetBase kpreviewwidgetbase.h <KPreviewWidgetBase> |
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| 22 | * |
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| 23 | * Abstract baseclass for all preview widgets which shall be used via |
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| 24 | * KFileDialog::setPreviewWidget(const KPreviewWidgetBase *). |
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| 25 | * Ownership will be transferred to KFileDialog, so you have to create |
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| 26 | * the preview with "new" and let KFileDialog delete it. |
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| 27 | * |
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| 28 | * Just derive your custom preview widget from KPreviewWidgetBase and implement |
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| 29 | * all the pure virtual methods. The slot showPreview(const QUrl &) is called |
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| 30 | * every time the file selection changes. |
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| 31 | * |
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| 32 | * @short Abstract baseclass for all preview widgets. |
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| 33 | * @author Frerich Raabe <raabe@kde.org> |
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| 34 | */ |
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| 35 | class KIOFILEWIDGETS_EXPORT KPreviewWidgetBase : public QWidget |
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| 36 | { |
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| 37 | Q_OBJECT |
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| 38 | |
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| 39 | public: |
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| 40 | /** |
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| 41 | * Constructor. Construct the user interface of your preview widget here |
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| 42 | * and pass the KFileDialog this preview widget is going to be used in as |
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| 43 | * the parent. |
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| 44 | * |
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| 45 | * @param parent The KFileDialog this preview widget is going to be used in |
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| 46 | */ |
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| 47 | explicit KPreviewWidgetBase(QWidget *parent); |
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| 48 | ~KPreviewWidgetBase() override; |
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| 49 | |
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| 50 | QStringList supportedMimeTypes() const; |
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| 51 | |
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| 52 | public Q_SLOTS: |
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| 53 | /** |
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| 54 | * This slot is called every time the user selects another file in the |
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| 55 | * file dialog. Implement the stuff necessary to reflect the change here. |
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| 56 | * |
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| 57 | * @param url The URL of the currently selected file. |
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| 58 | */ |
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| 59 | virtual void showPreview(const QUrl &url) = 0; |
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| 60 | |
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| 61 | /** |
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| 62 | * Reimplement this to clear the preview. This is called when e.g. the |
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| 63 | * selection is cleared or when multiple selections exist, or the directory |
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| 64 | * is changed. |
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| 65 | */ |
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| 66 | virtual void clearPreview() = 0; |
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| 67 | |
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| 68 | protected: |
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| 69 | void setSupportedMimeTypes(const QStringList &mimeTypes); |
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| 70 | |
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| 71 | private: |
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| 72 | class KPreviewWidgetBasePrivate; |
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| 73 | std::unique_ptr<KPreviewWidgetBasePrivate> const d; |
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| 74 | |
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| 75 | Q_DISABLE_COPY(KPreviewWidgetBase) |
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| 76 | }; |
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| 77 | |
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| 78 | #endif |
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| 79 | |
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