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2e230da361
For historic reasons, there where three distinct signals concerning dive-selection from the undo-machinery: 1) divesSelected: sent newly selected dives 2) currentDiveChanged: sent if the current dive changed 3) selectionChanged: sent at the end of a command if either the selection or the current dive changed Since now the undo-commands do a full reset of the selection, merge these three signals into a single signal. Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
108 lines
3.7 KiB
C++
108 lines
3.7 KiB
C++
// SPDX-License-Identifier: GPL-2.0
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// Helper functions for the undo-commands
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#include "command_private.h"
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#include "core/divelist.h"
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#include "core/display.h" // for amount_selected
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#include "core/subsurface-qt/DiveListNotifier.h"
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namespace Command {
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// Set the current dive either from a list of selected dives,
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// or a newly selected dive. In both cases, try to select the
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// dive that is newer that is newer than the given date.
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// This mimics the old behavior when the current dive changed.
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static void setClosestCurrentDive(timestamp_t when, const std::vector<dive *> &selection)
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{
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// Start from back until we get the first dive that is before
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// the supposed-to-be selected dive. (Note: this mimics the
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// old behavior when the current dive changed).
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for (auto it = selection.rbegin(); it < selection.rend(); ++it) {
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if ((*it)->when > when && !(*it)->hidden_by_filter) {
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current_dive = *it;
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return;
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}
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}
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// We didn't find a more recent selected dive -> try to
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// find *any* visible selected dive.
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for (dive *d: selection) {
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if (!d->hidden_by_filter) {
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current_dive = d;
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return;
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}
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}
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// No selected dive is visible! Take the closest dive. Note, this might
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// return null, but that just means unsetting the current dive (as no
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// dive is visible anyway).
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current_dive = find_next_visible_dive(when);
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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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void setSelection(const std::vector<dive *> &selection, dive *currentDive)
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{
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// To do so, generate vectors of dives to be selected and deselected.
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// We send signals batched by trip, so keep track of trip/dive pairs.
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QVector<dive *> divesToSelect;
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divesToSelect.reserve(selection.size());
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// TODO: We might want to keep track of selected dives in a more efficient way!
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int i;
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dive *d;
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amount_selected = 0; // We recalculate amount_selected
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for_each_dive(i, d) {
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// We only modify dives that are currently visible.
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if (d->hidden_by_filter) {
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d->selected = false; // Note, not necessary, just to be sure
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// that we get amount_selected right
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continue;
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}
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// Search the dive in the list of selected dives.
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// TODO: By sorting the list in the same way as the backend, this could be made more efficient.
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bool newState = std::find(selection.begin(), selection.end(), d) != selection.end();
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if (newState) {
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++amount_selected;
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divesToSelect.push_back(d);
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}
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// TODO: Instead of using select_dive() and deselect_dive(), we set selected directly.
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// The reason is that deselect() automatically sets a new current dive, which we
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// don't want, as we set it later anyway.
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// There is other parts of the C++ code that touches the innards directly, but
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// ultimately this should be pushed down to C.
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d->selected = newState;
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}
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// We cannot simply change the current dive to the given dive.
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// It might be hidden by a filter and thus not be selected.
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current_dive = currentDive;
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if (current_dive && !currentDive->selected) {
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// Current not visible -> find a different dive.
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setClosestCurrentDive(currentDive->when, selection);
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}
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// Send the new selection
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emit diveListNotifier.divesSelected(divesToSelect, current_dive);
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}
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// Turn current selection into a vector.
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// TODO: This could be made much more efficient if we kept a sorted list of selected dives!
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std::vector<dive *> getDiveSelection()
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{
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std::vector<dive *> res;
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res.reserve(amount_selected);
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int i;
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dive *d;
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for_each_dive(i, d) {
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if (d->selected)
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res.push_back(d);
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}
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return res;
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}
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} // namespace Command
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