| 1 | // SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL |
|---|
| 2 | // SPDX-FileCopyrightText: 2022-2023 Harald Sitter <sitter@kde.org> |
|---|
| 3 | |
|---|
| 4 | #ifndef KCOUNTRYFLAGEMOJIICONENGINE_H |
|---|
| 5 | #define KCOUNTRYFLAGEMOJIICONENGINE_H |
|---|
| 6 | |
|---|
| 7 | #include <QIconEngine> |
|---|
| 8 | |
|---|
| 9 | #include <kguiaddons_export.h> |
|---|
| 10 | |
|---|
| 11 | class KCountryFlagEmojiIconEnginePrivate; |
|---|
| 12 | |
|---|
| 13 | /** |
|---|
| 14 | * @brief Provides emoji flags as icons |
|---|
| 15 | * This is a special icon engine that internally paints flags using emoji fonts. |
|---|
| 16 | * It provides access to country and region flags from the system emoji font. |
|---|
| 17 | * ``` |
|---|
| 18 | * auto l = new QLabel; |
|---|
| 19 | * l->setMinimumSize(512, 512); |
|---|
| 20 | * l->setPixmap(QIcon(new KCountryFlagEmojiIconEngine("AT")).pixmap(512, 512)); |
|---|
| 21 | * ``` |
|---|
| 22 | * @since 6.0 |
|---|
| 23 | */ |
|---|
| 24 | class KGUIADDONS_EXPORT KCountryFlagEmojiIconEngine : public QIconEngine |
|---|
| 25 | { |
|---|
| 26 | public: |
|---|
| 27 | /** |
|---|
| 28 | * @brief Construct a new KCountryFlagEmojiIconEngine object |
|---|
| 29 | * Please note that regional flag support can be spotty in emoji fonts. |
|---|
| 30 | * @param regionOrCountry either a ISO 3166-1 alpha-2 country code or a ISO 3166-2 region code (e.g. AT for Austria or GB-SCT for Scotland) |
|---|
| 31 | */ |
|---|
| 32 | explicit KCountryFlagEmojiIconEngine(const QString ®ionOrCountry); |
|---|
| 33 | ~KCountryFlagEmojiIconEngine() override; |
|---|
| 34 | Q_DISABLE_COPY_MOVE(KCountryFlagEmojiIconEngine) |
|---|
| 35 | |
|---|
| 36 | QIconEngine *clone() const override; |
|---|
| 37 | QString key() const override; |
|---|
| 38 | void paint(QPainter *painter, const QRect &rect, QIcon::Mode mode, QIcon::State state) override; |
|---|
| 39 | QPixmap pixmap(const QSize &size, QIcon::Mode mode, QIcon::State state) override; |
|---|
| 40 | QPixmap scaledPixmap(const QSize &size, QIcon::Mode mode, QIcon::State state, qreal scale) override; |
|---|
| 41 | |
|---|
| 42 | /** |
|---|
| 43 | * @brief Check whether the internal emoji unicode sequence is null |
|---|
| 44 | * This does not necessarily mean that the pixmap output will be a valid flag - that entirely depends on the system's precise font configuration. |
|---|
| 45 | * @return true when the construction of the emoji string failed |
|---|
| 46 | * @return false when the construction of the emoji string succeeded |
|---|
| 47 | */ |
|---|
| 48 | bool isNull() override; |
|---|
| 49 | |
|---|
| 50 | /** |
|---|
| 51 | * @brief Set the Global Default Font object |
|---|
| 52 | * This is primarily useful for platform themes that wish to force a specific font being used. By default the "emoji" font family will be used. |
|---|
| 53 | * Forcing a specific font and making sure it is available as runtime requirement is the most reliable way to ensure that flag support is working |
|---|
| 54 | * regardless of system configuration. |
|---|
| 55 | * @param font the default font to use |
|---|
| 56 | */ |
|---|
| 57 | static void setGlobalDefaultFont(const QFont &font); |
|---|
| 58 | |
|---|
| 59 | private: |
|---|
| 60 | std::unique_ptr<KCountryFlagEmojiIconEnginePrivate> const d; |
|---|
| 61 | }; |
|---|
| 62 | |
|---|
| 63 | #endif |
|---|
| 64 | |
|---|
