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| |
| #ifndef QQUICKRANGEMODEL_P_P_H |
| #define QQUICKRANGEMODEL_P_P_H |
| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the Qt Components API. It exists purely as an |
| // implementation detail. This header file may change from version to |
| // version without notice, or even be removed. |
| // |
| // We mean it. |
| // |
| |
| #include "qquickrangemodel_p.h" |
| |
| QT_BEGIN_NAMESPACE |
| |
| class QQuickRangeModel1Private |
| { |
| Q_DECLARE_PUBLIC(QQuickRangeModel1) |
| public: |
| QQuickRangeModel1Private(QQuickRangeModel1 *qq); |
| virtual ~QQuickRangeModel1Private(); |
| |
| void init(); |
| |
| qreal posatmin, posatmax; |
| qreal minimum, maximum, stepSize, pos, value; |
| |
| uint inverted : 1; |
| |
| QQuickRangeModel1 *q_ptr; |
| bool isComplete; |
| bool positionChanged; |
| bool valueChanged; |
| |
| inline qreal effectivePosAtMin() const { |
| return inverted ? posatmax : posatmin; |
| } |
| |
| inline qreal effectivePosAtMax() const { |
| return inverted ? posatmin : posatmax; |
| } |
| |
| inline qreal equivalentPosition(qreal value) const { |
| // Return absolute position from absolute value |
| const qreal valueRange = maximum - minimum; |
| if (valueRange == 0) |
| return effectivePosAtMin(); |
| |
| const qreal scale = (effectivePosAtMax() - effectivePosAtMin()) / valueRange; |
| return (value - minimum) * scale + effectivePosAtMin(); |
| } |
| |
| inline qreal equivalentValue(qreal pos) const { |
| // Return absolute value from absolute position |
| const qreal posRange = effectivePosAtMax() - effectivePosAtMin(); |
| if (posRange == 0) |
| return minimum; |
| |
| const qreal scale = (maximum - minimum) / posRange; |
| // Avoid perverse rounding glitches when at an end: |
| const qreal mid = (effectivePosAtMax() + effectivePosAtMin()) * 0.5; |
| if (pos < mid) |
| return (pos - effectivePosAtMin()) * scale + minimum; |
| return maximum - scale * (effectivePosAtMax() - pos); |
| } |
| |
| qreal publicPosition(qreal position) const; |
| qreal publicValue(qreal value) const; |
| void emitValueAndPositionIfChanged(const qreal oldValue, const qreal oldPosition); |
| }; |
| |
| QT_END_NAMESPACE |
| |
| #endif // QQUICKRANGEMODEL_P_P_H |