1 #include "midi_mapping_dialog.h"
4 #include <google/protobuf/descriptor.h>
5 #include <google/protobuf/message.h>
7 #include <QDialogButtonBox>
10 #include <QPushButton>
12 #include <QStringList>
13 #include <QTreeWidget>
21 #include "shared/controller_spin_box.h"
22 #include "midi_mapper.h"
23 #include "nageru_midi_mapping.pb.h"
24 #include "shared/midi_mapper_util.h"
25 #include "shared/post_to_main_thread.h"
26 #include "ui_midi_mapping.h"
30 using namespace google::protobuf;
33 vector<MIDIMappingDialog::Control> per_bus_controllers = {
34 { "Stereo width", MIDIMappingBusProto::kStereoWidthFieldNumber,
35 MIDIMappingProto::kStereoWidthBankFieldNumber },
36 { "Treble", MIDIMappingBusProto::kTrebleFieldNumber, MIDIMappingProto::kTrebleBankFieldNumber },
37 { "Mid", MIDIMappingBusProto::kMidFieldNumber, MIDIMappingProto::kMidBankFieldNumber },
38 { "Bass", MIDIMappingBusProto::kBassFieldNumber, MIDIMappingProto::kBassBankFieldNumber },
39 { "Gain", MIDIMappingBusProto::kGainFieldNumber, MIDIMappingProto::kGainBankFieldNumber },
40 { "Compressor threshold", MIDIMappingBusProto::kCompressorThresholdFieldNumber,
41 MIDIMappingProto::kCompressorThresholdBankFieldNumber},
42 { "Fader", MIDIMappingBusProto::kFaderFieldNumber, MIDIMappingProto::kFaderBankFieldNumber }
44 vector<MIDIMappingDialog::Control> per_bus_buttons = {
45 { "Toggle mute", MIDIMappingBusProto::kToggleMuteFieldNumber,
46 MIDIMappingProto::kToggleMuteBankFieldNumber },
47 { "Toggle locut", MIDIMappingBusProto::kToggleLocutFieldNumber,
48 MIDIMappingProto::kToggleLocutBankFieldNumber },
49 { "Togle auto gain staging", MIDIMappingBusProto::kToggleAutoGainStagingFieldNumber,
50 MIDIMappingProto::kToggleAutoGainStagingBankFieldNumber },
51 { "Togle compressor", MIDIMappingBusProto::kToggleCompressorFieldNumber,
52 MIDIMappingProto::kToggleCompressorBankFieldNumber },
53 { "Clear peak", MIDIMappingBusProto::kClearPeakFieldNumber,
54 MIDIMappingProto::kClearPeakBankFieldNumber }
56 vector<MIDIMappingDialog::Control> per_bus_lights = {
57 { "Is muted", MIDIMappingBusProto::kIsMutedFieldNumber, 0 },
58 { "Locut is on", MIDIMappingBusProto::kLocutIsOnFieldNumber, 0 },
59 { "Auto gain staging is on", MIDIMappingBusProto::kAutoGainStagingIsOnFieldNumber, 0 },
60 { "Compressor is on", MIDIMappingBusProto::kCompressorIsOnFieldNumber, 0 },
61 { "Bus has peaked", MIDIMappingBusProto::kHasPeakedFieldNumber, 0 }
63 vector<MIDIMappingDialog::Control> global_controllers = {
64 { "Locut cutoff", MIDIMappingBusProto::kLocutFieldNumber, MIDIMappingProto::kLocutBankFieldNumber },
65 { "Limiter threshold", MIDIMappingBusProto::kLimiterThresholdFieldNumber,
66 MIDIMappingProto::kLimiterThresholdBankFieldNumber },
67 { "Makeup gain", MIDIMappingBusProto::kMakeupGainFieldNumber,
68 MIDIMappingProto::kMakeupGainBankFieldNumber }
70 vector<MIDIMappingDialog::Control> global_buttons = {
71 { "Previous bank", MIDIMappingBusProto::kPrevBankFieldNumber, 0 },
72 { "Next bank", MIDIMappingBusProto::kNextBankFieldNumber, 0 },
73 { "Select bank 1", MIDIMappingBusProto::kSelectBank1FieldNumber, 0 },
74 { "Select bank 2", MIDIMappingBusProto::kSelectBank2FieldNumber, 0 },
75 { "Select bank 3", MIDIMappingBusProto::kSelectBank3FieldNumber, 0 },
76 { "Select bank 4", MIDIMappingBusProto::kSelectBank4FieldNumber, 0 },
77 { "Select bank 5", MIDIMappingBusProto::kSelectBank5FieldNumber, 0 },
78 { "Toggle limiter", MIDIMappingBusProto::kToggleLimiterFieldNumber, MIDIMappingProto::kToggleLimiterBankFieldNumber },
79 { "Toggle auto makeup gain", MIDIMappingBusProto::kToggleAutoMakeupGainFieldNumber, MIDIMappingProto::kToggleAutoMakeupGainBankFieldNumber }
81 vector<MIDIMappingDialog::Control> global_lights = {
82 { "Bank 1 is selected", MIDIMappingBusProto::kBank1IsSelectedFieldNumber, 0 },
83 { "Bank 2 is selected", MIDIMappingBusProto::kBank2IsSelectedFieldNumber, 0 },
84 { "Bank 3 is selected", MIDIMappingBusProto::kBank3IsSelectedFieldNumber, 0 },
85 { "Bank 4 is selected", MIDIMappingBusProto::kBank4IsSelectedFieldNumber, 0 },
86 { "Bank 5 is selected", MIDIMappingBusProto::kBank5IsSelectedFieldNumber, 0 },
87 { "Limiter is on", MIDIMappingBusProto::kLimiterIsOnFieldNumber, 0 },
88 { "Auto makeup gain is on", MIDIMappingBusProto::kAutoMakeupGainIsOnFieldNumber, 0 },
91 vector<MIDIMappingDialog::Control> global_video = {
92 { "Switch video channel", MIDIMappingBusProto::kSwitchVideoChannelFieldNumber, MIDIMappingProto::kSwitchVideoChannelBankFieldNumber },
93 { "Apply transition", MIDIMappingBusProto::kApplyTransitionFieldNumber, MIDIMappingProto::kApplyTransitionBankFieldNumber },
96 vector<MIDIMappingDialog::Control> main_ui = {
97 { "Previous audio view", MIDIMappingBusProto::kPrevAudioViewFieldNumber, MIDIMappingProto::kPrevAudioViewBankFieldNumber },
98 { "Next audio view", MIDIMappingBusProto::kNextAudioViewFieldNumber, MIDIMappingProto::kNextAudioViewBankFieldNumber },
99 { "Begin new video segment", MIDIMappingBusProto::kBeginNewVideoSegmentFieldNumber, MIDIMappingProto::kBeginNewVideoSegmentBankFieldNumber },
100 { "Exit Nageru", MIDIMappingBusProto::kExitFieldNumber, MIDIMappingProto::kExitBankFieldNumber },
105 int get_bank(const MIDIMappingProto &mapping_proto, int bank_field_number, int default_value)
107 const FieldDescriptor *bank_descriptor = mapping_proto.GetDescriptor()->FindFieldByNumber(bank_field_number);
108 const Reflection *reflection = mapping_proto.GetReflection();
109 if (!reflection->HasField(mapping_proto, bank_descriptor)) {
110 return default_value;
112 return reflection->GetInt32(mapping_proto, bank_descriptor);
115 int get_controller_mapping(const MIDIMappingProto &mapping_proto, size_t bus_idx, int field_number, int default_value)
117 if (bus_idx >= size_t(mapping_proto.bus_mapping_size())) {
118 return default_value;
120 const MIDIMappingBusProto &bus_mapping = mapping_proto.bus_mapping(bus_idx);
121 return get_controller_mapping_helper(bus_mapping, field_number, default_value);
124 int get_button_mapping(const MIDIMappingProto &mapping_proto, size_t bus_idx, int field_number, int default_value)
126 if (bus_idx >= size_t(mapping_proto.bus_mapping_size())) {
127 return default_value;
130 const MIDIMappingBusProto &bus_mapping = mapping_proto.bus_mapping(bus_idx);
131 return get_button_mapping_helper(bus_mapping, field_number, default_value);
134 int get_light_mapping(const MIDIMappingProto &mapping_proto, size_t bus_idx, int field_number, int default_value)
136 if (bus_idx >= size_t(mapping_proto.bus_mapping_size())) {
137 return default_value;
140 const MIDIMappingBusProto &bus_mapping = mapping_proto.bus_mapping(bus_idx);
141 const FieldDescriptor *descriptor = bus_mapping.GetDescriptor()->FindFieldByNumber(field_number);
142 const Reflection *bus_reflection = bus_mapping.GetReflection();
143 if (!bus_reflection->HasField(bus_mapping, descriptor)) {
144 return default_value;
146 const MIDILightProto &bus_proto =
147 static_cast<const MIDILightProto &>(bus_reflection->GetMessage(bus_mapping, descriptor));
148 return bus_proto.note_number();
153 MIDIMappingDialog::MIDIMappingDialog(MIDIMapper *mapper)
154 : ui(new Ui::MIDIMappingDialog),
159 const MIDIMappingProto mapping_proto = mapper->get_current_mapping(); // Take a copy.
160 old_receiver = mapper->set_receiver(this);
164 labels << "Controller bank";
165 for (unsigned bus_idx = 0; bus_idx < num_buses; ++bus_idx) {
167 snprintf(buf, sizeof(buf), "Bus %d", bus_idx + 1);
171 ui->treeWidget->setColumnCount(num_buses + 3);
172 ui->treeWidget->setHeaderLabels(labels);
174 add_controls("Per-bus controllers", ControlType::CONTROLLER, SpinnerGroup::PER_BUS_CONTROLLERS, mapping_proto, per_bus_controllers);
175 add_controls("Per-bus buttons", ControlType::BUTTON, SpinnerGroup::PER_BUS_BUTTONS, mapping_proto, per_bus_buttons);
176 add_controls("Per-bus lights", ControlType::LIGHT, SpinnerGroup::PER_BUS_LIGHTS, mapping_proto, per_bus_lights);
177 add_controls("Video mixing", ControlType::BUTTON, SpinnerGroup::GLOBAL_BUTTONS, mapping_proto, global_video);
178 add_controls("Global controllers", ControlType::CONTROLLER, SpinnerGroup::GLOBAL_CONTROLLERS, mapping_proto, global_controllers);
179 add_controls("Global buttons", ControlType::BUTTON, SpinnerGroup::GLOBAL_BUTTONS, mapping_proto, global_buttons);
180 add_controls("Main UI", ControlType::BUTTON, SpinnerGroup::GLOBAL_BUTTONS, mapping_proto, main_ui);
181 add_controls("Global lights", ControlType::LIGHT, SpinnerGroup::GLOBAL_LIGHTS, mapping_proto, global_lights);
182 fill_controls_from_mapping(mapping_proto);
184 // Auto-resize every column but the last.
185 for (unsigned column_idx = 0; column_idx < num_buses + 3; ++column_idx) {
186 ui->treeWidget->resizeColumnToContents(column_idx);
189 connect(ui->guess_bus_button, &QPushButton::clicked,
190 bind(&MIDIMappingDialog::guess_clicked, this, false));
191 connect(ui->guess_group_button, &QPushButton::clicked,
192 bind(&MIDIMappingDialog::guess_clicked, this, true));
193 connect(ui->ok_cancel_buttons, &QDialogButtonBox::accepted, this, &MIDIMappingDialog::ok_clicked);
194 connect(ui->ok_cancel_buttons, &QDialogButtonBox::rejected, this, &MIDIMappingDialog::cancel_clicked);
195 connect(ui->save_button, &QPushButton::clicked, this, &MIDIMappingDialog::save_clicked);
196 connect(ui->load_button, &QPushButton::clicked, this, &MIDIMappingDialog::load_clicked);
198 update_guess_button_state();
201 MIDIMappingDialog::~MIDIMappingDialog()
203 mapper->set_receiver(old_receiver);
204 mapper->refresh_highlights();
207 bool MIDIMappingDialog::eventFilter(QObject *obj, QEvent *event)
209 if (event->type() == QEvent::FocusIn ||
210 event->type() == QEvent::FocusOut) {
211 // We ignore the guess buttons themselves; it should be allowed
212 // to navigate from a spinner to focus on a button (to click it).
213 if (obj != ui->guess_bus_button && obj != ui->guess_group_button) {
214 update_guess_button_state();
220 void MIDIMappingDialog::guess_clicked(bool limit_to_group)
222 FocusInfo focus = find_focus();
223 if (focus.bus_idx == -1) {
224 // The guess button probably took the focus away from us.
227 assert(focus.bus_idx != -1); // The button should have been disabled.
228 pair<int, int> bus_and_offset = guess_offset(focus.bus_idx, limit_to_group ? focus.spinner_group : SpinnerGroup::ALL_GROUPS);
229 const int source_bus_idx = bus_and_offset.first;
230 const int offset = bus_and_offset.second;
231 assert(source_bus_idx != -1); // The button should have been disabled.
233 for (const auto &field_number_and_spinner : spinners[focus.bus_idx]) {
234 int field_number = field_number_and_spinner.first;
235 QSpinBox *spinner = field_number_and_spinner.second.spinner;
236 SpinnerGroup this_spinner_group = field_number_and_spinner.second.group;
238 if (limit_to_group && this_spinner_group != focus.spinner_group) {
242 assert(spinners[source_bus_idx].count(field_number));
243 QSpinBox *source_spinner = spinners[source_bus_idx][field_number].spinner;
244 assert(spinners[source_bus_idx][field_number].group == this_spinner_group);
246 if (source_spinner->value() != -1) {
247 spinner->setValue(source_spinner->value() + offset);
251 // See if we can find a “next” bus to move the focus to.
252 const int next_bus_idx = focus.bus_idx + (focus.bus_idx - source_bus_idx); // Note: Could become e.g. -1.
253 for (const InstantiatedSpinner &is : controller_spinners) {
254 if (int(is.bus_idx) == next_bus_idx && is.field_number == focus.field_number) {
255 is.spinner->setFocus();
258 for (const InstantiatedSpinner &is : button_spinners) {
259 if (int(is.bus_idx) == next_bus_idx && is.field_number == focus.field_number) {
260 is.spinner->setFocus();
263 for (const InstantiatedSpinner &is : light_spinners) {
264 if (int(is.bus_idx) == next_bus_idx && is.field_number == focus.field_number) {
265 is.spinner->setFocus();
270 void MIDIMappingDialog::ok_clicked()
272 unique_ptr<MIDIMappingProto> new_mapping = construct_mapping_proto_from_ui();
273 mapper->set_midi_mapping(*new_mapping);
274 mapper->set_receiver(old_receiver);
278 void MIDIMappingDialog::cancel_clicked()
280 mapper->set_receiver(old_receiver);
284 void MIDIMappingDialog::save_clicked()
287 // The native file dialog uses GTK+, which interferes with CEF's use of the GLib main loop.
288 QFileDialog::Options options(QFileDialog::DontUseNativeDialog);
290 QFileDialog::Options options;
292 unique_ptr<MIDIMappingProto> new_mapping = construct_mapping_proto_from_ui();
293 QString filename = QFileDialog::getSaveFileName(this,
294 "Save MIDI mapping", QString(), tr("Mapping files (*.midimapping)"), /*selectedFilter=*/nullptr, options);
295 if (!filename.endsWith(".midimapping")) {
296 filename += ".midimapping";
298 if (!save_midi_mapping_to_file(*new_mapping, filename.toStdString())) {
300 box.setText("Could not save mapping to '" + filename + "'. Check that you have the right permissions and try again.");
305 void MIDIMappingDialog::load_clicked()
308 // The native file dialog uses GTK+, which interferes with CEF's use of the GLib main loop.
309 QFileDialog::Options options(QFileDialog::DontUseNativeDialog);
311 QFileDialog::Options options;
313 QString filename = QFileDialog::getOpenFileName(this,
314 "Load MIDI mapping", QString(), tr("Mapping files (*.midimapping)"), /*selectedFilter=*/nullptr, options);
315 MIDIMappingProto new_mapping;
316 if (!load_midi_mapping_from_file(filename.toStdString(), &new_mapping)) {
318 box.setText("Could not load mapping from '" + filename + "'. Check that the file exists, has the right permissions and is valid.");
323 fill_controls_from_mapping(new_mapping);
329 T *get_mutable_bus_message(MIDIMappingProto *mapping_proto, unsigned bus_idx, int field_number)
331 while (size_t(mapping_proto->bus_mapping_size()) <= bus_idx) {
332 mapping_proto->add_bus_mapping();
335 MIDIMappingBusProto *bus_mapping = mapping_proto->mutable_bus_mapping(bus_idx);
336 const FieldDescriptor *descriptor = bus_mapping->GetDescriptor()->FindFieldByNumber(field_number);
337 const Reflection *bus_reflection = bus_mapping->GetReflection();
338 return static_cast<T *>(bus_reflection->MutableMessage(bus_mapping, descriptor));
343 unique_ptr<MIDIMappingProto> MIDIMappingDialog::construct_mapping_proto_from_ui()
345 unique_ptr<MIDIMappingProto> mapping_proto(new MIDIMappingProto);
346 for (const InstantiatedSpinner &is : controller_spinners) {
347 const int val = is.spinner->value();
352 MIDIControllerProto *controller_proto =
353 get_mutable_bus_message<MIDIControllerProto>(mapping_proto.get(), is.bus_idx, is.field_number);
354 controller_proto->set_controller_number(val);
356 for (const InstantiatedSpinner &is : button_spinners) {
357 const int val = is.spinner->value();
362 MIDIButtonProto *button_proto =
363 get_mutable_bus_message<MIDIButtonProto>(mapping_proto.get(), is.bus_idx, is.field_number);
364 button_proto->set_note_number(val);
366 for (const InstantiatedSpinner &is : light_spinners) {
367 const int val = is.spinner->value();
372 MIDILightProto *light_proto =
373 get_mutable_bus_message<MIDILightProto>(mapping_proto.get(), is.bus_idx, is.field_number);
374 light_proto->set_note_number(val);
376 int highest_bank_used = 0; // 1-indexed.
377 for (const InstantiatedComboBox &ic : bank_combo_boxes) {
378 const int val = ic.combo_box->currentIndex();
379 highest_bank_used = std::max(highest_bank_used, val);
384 const FieldDescriptor *descriptor = mapping_proto->GetDescriptor()->FindFieldByNumber(ic.field_number);
385 const Reflection *bus_reflection = mapping_proto->GetReflection();
386 bus_reflection->SetInt32(mapping_proto.get(), descriptor, val - 1);
388 mapping_proto->set_num_controller_banks(highest_bank_used);
389 return mapping_proto;
392 void MIDIMappingDialog::add_bank_selector(QTreeWidgetItem *item, const MIDIMappingProto &mapping_proto, int bank_field_number)
394 if (bank_field_number == 0) {
397 QComboBox *bank_selector = new QComboBox(this);
398 bank_selector->addItems(QStringList() << "" << "Bank 1" << "Bank 2" << "Bank 3" << "Bank 4" << "Bank 5");
399 bank_selector->setAutoFillBackground(true);
401 bank_combo_boxes.push_back(InstantiatedComboBox{ bank_selector, bank_field_number });
403 ui->treeWidget->setItemWidget(item, 1, bank_selector);
406 void MIDIMappingDialog::add_controls(const string &heading,
407 MIDIMappingDialog::ControlType control_type,
408 MIDIMappingDialog::SpinnerGroup spinner_group,
409 const MIDIMappingProto &mapping_proto,
410 const vector<MIDIMappingDialog::Control> &controls)
412 QTreeWidgetItem *heading_item = new QTreeWidgetItem(ui->treeWidget);
413 heading_item->setText(0, QString::fromStdString(heading));
414 heading_item->setFirstColumnSpanned(true);
415 heading_item->setExpanded(true);
416 for (const Control &control : controls) {
417 QTreeWidgetItem *item = new QTreeWidgetItem(heading_item);
418 heading_item->addChild(item);
419 add_bank_selector(item, mapping_proto, control.bank_field_number);
420 item->setText(0, QString::fromStdString(control.label + " "));
422 for (unsigned bus_idx = 0; bus_idx < num_buses; ++bus_idx) {
424 if (control_type == ControlType::CONTROLLER) {
425 spinner = new ControllerSpinBox(this);
426 spinner->setRange(-1, 128); // 128 for pitch bend.
428 spinner = new QSpinBox(this);
429 spinner->setRange(-1, 127);
431 spinner->setAutoFillBackground(true);
432 spinner->setSpecialValueText("\u200d"); // Zero-width joiner (ie., empty).
433 spinner->installEventFilter(this); // So we know when the focus changes.
434 ui->treeWidget->setItemWidget(item, bus_idx + 2, spinner);
436 if (control_type == ControlType::CONTROLLER) {
437 controller_spinners.push_back(InstantiatedSpinner{ spinner, bus_idx, spinner_group, control.field_number });
438 } else if (control_type == ControlType::BUTTON) {
439 button_spinners.push_back(InstantiatedSpinner{ spinner, bus_idx, spinner_group, control.field_number });
441 assert(control_type == ControlType::LIGHT);
442 light_spinners.push_back(InstantiatedSpinner{ spinner, bus_idx, spinner_group, control.field_number });
444 spinners[bus_idx][control.field_number] = SpinnerAndGroup{ spinner, spinner_group };
445 connect(spinner, static_cast<void(QSpinBox::*)(int)>(&QSpinBox::valueChanged),
446 bind(&MIDIMappingDialog::update_guess_button_state, this));
449 ui->treeWidget->addTopLevelItem(heading_item);
452 void MIDIMappingDialog::fill_controls_from_mapping(const MIDIMappingProto &mapping_proto)
454 for (const InstantiatedSpinner &is : controller_spinners) {
455 is.spinner->setValue(get_controller_mapping(mapping_proto, is.bus_idx, is.field_number, -1));
457 for (const InstantiatedSpinner &is : button_spinners) {
458 is.spinner->setValue(get_button_mapping(mapping_proto, is.bus_idx, is.field_number, -1));
460 for (const InstantiatedSpinner &is : light_spinners) {
461 is.spinner->setValue(get_light_mapping(mapping_proto, is.bus_idx, is.field_number, -1));
463 for (const InstantiatedComboBox &ic : bank_combo_boxes) {
464 ic.combo_box->setCurrentIndex(get_bank(mapping_proto, ic.field_number, -1) + 1);
468 void MIDIMappingDialog::controller_changed(unsigned controller)
470 post_to_main_thread([=]{
471 for (const InstantiatedSpinner &is : controller_spinners) {
472 if (is.spinner->hasFocus()) {
473 is.spinner->setValue(controller);
474 is.spinner->selectAll();
480 void MIDIMappingDialog::note_on(unsigned note)
482 post_to_main_thread([=]{
483 for (const InstantiatedSpinner &is : button_spinners) {
484 if (is.spinner->hasFocus()) {
485 is.spinner->setValue(note);
486 is.spinner->selectAll();
489 for (const InstantiatedSpinner &is : light_spinners) {
490 if (is.spinner->hasFocus()) {
491 is.spinner->setValue(note);
492 is.spinner->selectAll();
498 pair<int, int> MIDIMappingDialog::guess_offset(unsigned bus_idx, MIDIMappingDialog::SpinnerGroup spinner_group)
500 constexpr pair<int, int> not_found(-1, 0);
502 if (bus_is_empty(bus_idx, spinner_group)) {
506 // See if we can find a non-empty bus to source from (prefer from the left).
507 unsigned source_bus_idx;
508 if (bus_idx > 0 && !bus_is_empty(bus_idx - 1, spinner_group)) {
509 source_bus_idx = bus_idx - 1;
510 } else if (bus_idx < num_buses - 1 && !bus_is_empty(bus_idx + 1, spinner_group)) {
511 source_bus_idx = bus_idx + 1;
516 // See if we can find a consistent offset.
517 bool found_offset = false;
519 int minimum_allowed_offset = numeric_limits<int>::min();
520 int maximum_allowed_offset = numeric_limits<int>::max();
521 for (const auto &field_number_and_spinner : spinners[bus_idx]) {
522 int field_number = field_number_and_spinner.first;
523 QSpinBox *spinner = field_number_and_spinner.second.spinner;
524 SpinnerGroup this_spinner_group = field_number_and_spinner.second.group;
525 assert(spinners[source_bus_idx].count(field_number));
526 QSpinBox *source_spinner = spinners[source_bus_idx][field_number].spinner;
527 assert(spinners[source_bus_idx][field_number].group == this_spinner_group);
529 if (spinner_group != SpinnerGroup::ALL_GROUPS &&
530 spinner_group != this_spinner_group) {
533 if (spinner->value() == -1) {
534 if (source_spinner->value() != -1) {
535 // If the source value is e.g. 3, offset can't be less than -2 or larger than 124.
536 // Otherwise, we'd extrapolate values outside [1..127].
537 minimum_allowed_offset = max(minimum_allowed_offset, 1 - source_spinner->value());
538 maximum_allowed_offset = min(maximum_allowed_offset, 127 - source_spinner->value());
542 if (source_spinner->value() == -1) {
543 // The bus has a controller set that the source bus doesn't set.
546 if (source_spinner->value() == MIDIReceiver::PITCH_BEND_CONTROLLER) {
547 // It's impossible to interpolate across the pitch bend.
551 int candidate_offset = spinner->value() - source_spinner->value();
553 offset = candidate_offset;
555 } else if (candidate_offset != offset) {
561 // Given that the bus wasn't empty, this shouldn't happen.
566 if (offset < minimum_allowed_offset || offset > maximum_allowed_offset) {
569 return make_pair(source_bus_idx, offset);
572 bool MIDIMappingDialog::bus_is_empty(unsigned bus_idx, SpinnerGroup spinner_group)
574 for (const auto &field_number_and_spinner : spinners[bus_idx]) {
575 QSpinBox *spinner = field_number_and_spinner.second.spinner;
576 SpinnerGroup this_spinner_group = field_number_and_spinner.second.group;
577 if (spinner_group != SpinnerGroup::ALL_GROUPS &&
578 spinner_group != this_spinner_group) {
581 if (spinner->value() != -1) {
588 void MIDIMappingDialog::update_guess_button_state()
590 FocusInfo focus = find_focus();
591 if (focus.bus_idx < 0) {
595 pair<int, int> bus_and_offset = guess_offset(focus.bus_idx, SpinnerGroup::ALL_GROUPS);
596 ui->guess_bus_button->setEnabled(bus_and_offset.first != -1);
599 pair<int, int> bus_and_offset = guess_offset(focus.bus_idx, focus.spinner_group);
600 ui->guess_group_button->setEnabled(bus_and_offset.first != -1);
605 MIDIMappingDialog::FocusInfo MIDIMappingDialog::find_focus() const
607 for (const InstantiatedSpinner &is : controller_spinners) {
608 if (is.spinner->hasFocus()) {
609 return FocusInfo{ int(is.bus_idx), is.spinner_group, is.field_number };
612 for (const InstantiatedSpinner &is : button_spinners) {
613 if (is.spinner->hasFocus()) {
614 return FocusInfo{ int(is.bus_idx), is.spinner_group, is.field_number };
617 for (const InstantiatedSpinner &is : light_spinners) {
618 if (is.spinner->hasFocus()) {
619 return FocusInfo{ int(is.bus_idx), is.spinner_group, is.field_number };
622 return FocusInfo{ -1, SpinnerGroup::ALL_GROUPS, -1 };