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ebfa366826
Undo of editing should probably also restore the old selection and current dive. Therefore, move the functions that set and restore the selection and the current dive from the command_divelist.cpp into the command_private.cpp translation unit. Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
68 lines
2.5 KiB
C++
68 lines
2.5 KiB
C++
// SPDX-License-Identifier: GPL-2.0
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// Private definitions for the command-objects
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#ifndef COMMAND_PRIVATE_H
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#define COMMAND_PRIVATE_H
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#include "core/dive.h"
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#include <vector>
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#include <utility>
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#include <QVector>
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namespace Command {
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// Generally, signals are sent in batches per trip. To avoid writing the same loop
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// again and again, this template takes a vector of trip / dive pairs, sorts it
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// by trip and then calls a function-object with trip and a QVector of dives in that trip.
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// Input parameters:
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// - dives: a vector of trip,dive pairs, which will be sorted and processed in batches by trip.
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// - action: a function object, taking a trip-pointer and a QVector of dives, which will be called for each batch.
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template<typename Function>
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void processByTrip(std::vector<std::pair<dive_trip *, dive *>> &dives, Function action)
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{
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// Use std::tie for lexicographical sorting of trip, then start-time
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std::sort(dives.begin(), dives.end(),
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[](const std::pair<dive_trip *, dive *> &e1, const std::pair<dive_trip *, dive *> &e2)
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{ return std::tie(e1.first, e1.second->when) < std::tie(e2.first, e2.second->when); });
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// Then, process the dives in batches by trip
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size_t i, j; // Begin and end of batch
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for (i = 0; i < dives.size(); i = j) {
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dive_trip *trip = dives[i].first;
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for (j = i + 1; j < dives.size() && dives[j].first == trip; ++j)
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; // pass
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// Copy dives into a QVector. Some sort of "range_view" would be ideal, but Qt doesn't work this way.
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QVector<dive *> divesInTrip(j - i);
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for (size_t k = i; k < j; ++k)
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divesInTrip[k - i] = dives[k].second;
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// Finally, emit the signal
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action(trip, divesInTrip);
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}
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}
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// The processByTrip() function above takes a vector if (trip, dive) pairs.
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// This overload takes a vector of dives.
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template<typename Vector, typename Function>
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void processByTrip(Vector &divesIn, Function action)
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{
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std::vector<std::pair<dive_trip *, dive *>> dives;
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dives.reserve(divesIn.size());
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for (dive *d: divesIn)
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dives.push_back({ d->divetrip, d });
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processByTrip(dives, action);
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}
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// Reset the selection to the dives of the "selection" vector and send the appropriate signals.
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// Set the current dive to "currentDive". "currentDive" must be an element of "selection" (or
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// null if "seletion" is empty). Return true if the selection or current dive changed.
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bool setSelection(const std::vector<dive *> &selection, dive *currentDive);
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// Get currently selectd dives
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std::vector<dive *> getDiveSelection();
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} // namespace Command
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#endif // COMMAND_PRIVATE_H
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