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84 lines
1.7 KiB
C
84 lines
1.7 KiB
C
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#ifndef REFRESHDEFERRER_H
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#define REFRESHDEFERRER_H
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#include <QObject>
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class CutterDockWidget;
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class RefreshDeferrer;
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using RefreshDeferrerParams = void *;
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using RefreshDeferrerParamsResult = void *;
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class RefreshDeferrerAccumulator
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{
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friend class RefreshDeferrer;
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public:
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virtual ~RefreshDeferrerAccumulator() = default;
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protected:
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virtual void accumulate(RefreshDeferrerParams params) =0;
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virtual void ignoreParams(RefreshDeferrerParams params) =0;
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virtual void clear() =0;
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virtual RefreshDeferrerParamsResult result() =0;
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};
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template<class T>
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class ReplacingRefreshDeferrerAccumulator: public RefreshDeferrerAccumulator
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{
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private:
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T *value = nullptr;
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public:
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~ReplacingRefreshDeferrerAccumulator() override
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{
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delete value;
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}
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protected:
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void accumulate(RefreshDeferrerParams params) override
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{
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delete value;
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value = static_cast<T *>(params);
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}
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void ignoreParams(RefreshDeferrerParams params) override
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{
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delete static_cast<T *>(params);
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}
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void clear() override
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{
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delete value;
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value = nullptr;
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}
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virtual RefreshDeferrerParamsResult result() override
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{
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return value;
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}
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};
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class RefreshDeferrer : public QObject
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{
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Q_OBJECT
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private:
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CutterDockWidget *dockWidget = nullptr;
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RefreshDeferrerAccumulator *acc;
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bool dirty = false;
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public:
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RefreshDeferrer(RefreshDeferrerAccumulator *acc, QObject *parent = nullptr);
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virtual ~RefreshDeferrer();
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bool attemptRefresh(RefreshDeferrerParams params);
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void registerFor(CutterDockWidget *dockWidget);
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signals:
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void refreshNow(RefreshDeferrerParamsResult paramsResult);
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};
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#endif //REFRESHDEFERRER_H
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