| 1 | // Copyright (C) 2021 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only |
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| 3 | |
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| 4 | #ifndef TRIMPATH_P_H |
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| 5 | #define TRIMPATH_P_H |
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| 6 | |
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| 7 | // |
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| 8 | // W A R N I N G |
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| 9 | // ------------- |
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| 10 | // |
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| 11 | // This file is not part of the Qt API. It exists purely as an |
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| 12 | // implementation detail. This header file may change from version to |
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| 13 | // version without notice, or even be removed. |
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| 14 | // |
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| 15 | // We mean it. |
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| 16 | // |
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| 17 | |
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| 18 | #include <QMetaType> |
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| 19 | #include <QPainterPath> |
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| 20 | #include <private/qglobal_p.h> |
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| 21 | |
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| 22 | QT_BEGIN_NAMESPACE |
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| 23 | |
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| 24 | class TrimPath { |
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| 25 | public: |
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| 26 | TrimPath() = default; |
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| 27 | TrimPath(const QPainterPath &path) |
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| 28 | : mPath(path) {} |
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| 29 | TrimPath(const TrimPath &other) |
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| 30 | : mPath(other.mPath), mLens(other.mLens) {} |
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| 31 | ~TrimPath() {} |
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| 32 | |
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| 33 | void setPath(const QPainterPath &path) { |
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| 34 | mPath = path; |
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| 35 | mLens.clear(); |
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| 36 | } |
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| 37 | |
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| 38 | QPainterPath path() const { |
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| 39 | return mPath; |
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| 40 | } |
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| 41 | |
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| 42 | QPainterPath trimmed(qreal f1, qreal f2, qreal offset = 0.0) const; |
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| 43 | |
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| 44 | private: |
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| 45 | bool lensIsDirty() const { |
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| 46 | return mLens.size() != mPath.elementCount(); |
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| 47 | } |
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| 48 | void updateLens() const; |
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| 49 | int elementAtLength(qreal len) const; |
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| 50 | QPointF endPointOfElement(int elemIdx) const; |
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| 51 | void appendTrimmedElement(QPainterPath *to, int elemIdx, bool trimStart, qreal startLen, bool trimEnd, qreal endLen) const; |
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| 52 | void appendStartOfElement(QPainterPath *to, int elemIdx, qreal len) const { |
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| 53 | appendTrimmedElement(to, elemIdx, trimStart: false, startLen: 0.0, trimEnd: true, endLen: len); |
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| 54 | } |
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| 55 | void appendEndOfElement(QPainterPath *to, int elemIdx, qreal len) const { |
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| 56 | appendTrimmedElement(to, elemIdx, trimStart: true, startLen: len, trimEnd: false, endLen: 1.0); |
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| 57 | } |
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| 58 | |
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| 59 | void appendElementRange(QPainterPath *to, int first, int last) const; |
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| 60 | |
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| 61 | QPainterPath mPath; |
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| 62 | mutable QList<qreal> mLens; |
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| 63 | }; |
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| 64 | |
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| 65 | QT_END_NAMESPACE |
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| 66 | |
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| 67 | Q_DECLARE_METATYPE(TrimPath) |
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| 68 | |
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| 69 | #endif // TRIMPATH_P_H |
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| 70 | |
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