Allow using control 0.

Evidently, there are devices that use the entire range,
so the special value has to move to -1.

diff --git a/midi_mapping_dialog.cpp b/midi_mapping_dialog.cpp
index 783a2331caa487ce675a912a1350428a13cf9da1..02ce308daed8cb814f481a2389485f4fa5a041cd 100644 (file)
--- a/midi_mapping_dialog.cpp
+++ b/midi_mapping_dialog.cpp
@@ -239,7 +239,7 @@ void MIDIMappingDialog::guess_clicked(bool limit_to_group)
                QSpinBox *source_spinner = spinners[source_bus_idx][field_number].spinner;
                assert(spinners[source_bus_idx][field_number].group == this_spinner_group);
 
-               if (source_spinner->value() != 0) {
+               if (source_spinner->value() != -1) {
                        spinner->setValue(source_spinner->value() + offset);
                }
        }
@@ -329,7 +329,7 @@ unique_ptr<MIDIMappingProto> MIDIMappingDialog::construct_mapping_proto_from_ui(
        unique_ptr<MIDIMappingProto> mapping_proto(new MIDIMappingProto);
        for (const InstantiatedSpinner &is : controller_spinners) {
                const int val = is.spinner->value();
-               if (val == 0) {
+               if (val == -1) {
                        continue;
                }
 
@@ -339,7 +339,7 @@ unique_ptr<MIDIMappingProto> MIDIMappingDialog::construct_mapping_proto_from_ui(
        }
        for (const InstantiatedSpinner &is : button_spinners) {
                const int val = is.spinner->value();
-               if (val == 0) {
+               if (val == -1) {
                        continue;
                }
 
@@ -349,7 +349,7 @@ unique_ptr<MIDIMappingProto> MIDIMappingDialog::construct_mapping_proto_from_ui(
        }
        for (const InstantiatedSpinner &is : light_spinners) {
                const int val = is.spinner->value();
-               if (val == 0) {
+               if (val == -1) {
                        continue;
                }
 
@@ -405,7 +405,7 @@ void MIDIMappingDialog::add_controls(const string &heading,
 
                for (unsigned bus_idx = 0; bus_idx < num_buses; ++bus_idx) {
                        QSpinBox *spinner = new QSpinBox(this);
-                       spinner->setRange(0, 127);
+                       spinner->setRange(-1, 127);
                        spinner->setAutoFillBackground(true);
                        spinner->setSpecialValueText("\u200d");  // Zero-width joiner (ie., empty).
                        spinner->installEventFilter(this);  // So we know when the focus changes.
@@ -430,13 +430,13 @@ void MIDIMappingDialog::add_controls(const string &heading,
 void MIDIMappingDialog::fill_controls_from_mapping(const MIDIMappingProto &mapping_proto)
 {
        for (const InstantiatedSpinner &is : controller_spinners) {
-               is.spinner->setValue(get_controller_mapping(mapping_proto, is.bus_idx, is.field_number, 0));
+               is.spinner->setValue(get_controller_mapping(mapping_proto, is.bus_idx, is.field_number, -1));
        }
        for (const InstantiatedSpinner &is : button_spinners) {
-               is.spinner->setValue(get_button_mapping(mapping_proto, is.bus_idx, is.field_number, 0));
+               is.spinner->setValue(get_button_mapping(mapping_proto, is.bus_idx, is.field_number, -1));
        }
        for (const InstantiatedSpinner &is : light_spinners) {
-               is.spinner->setValue(get_light_mapping(mapping_proto, is.bus_idx, is.field_number, 0));
+               is.spinner->setValue(get_light_mapping(mapping_proto, is.bus_idx, is.field_number, -1));
        }
        for (const InstantiatedComboBox &ic : bank_combo_boxes) {
                ic.combo_box->setCurrentIndex(get_bank(mapping_proto, ic.field_number, -1) + 1);
@@ -504,8 +504,8 @@ pair<int, int> MIDIMappingDialog::guess_offset(unsigned bus_idx, MIDIMappingDial
                    spinner_group != this_spinner_group) {
                        continue;
                }
-               if (spinner->value() == 0) {
-                       if (source_spinner->value() != 0) {
+               if (spinner->value() == -1) {
+                       if (source_spinner->value() != -1) {
                                // If the source value is e.g. 3, offset can't be less than -2 or larger than 124.
                                // Otherwise, we'd extrapolate values outside [1..127].
                                minimum_allowed_offset = max(minimum_allowed_offset, 1 - source_spinner->value());
@@ -513,7 +513,7 @@ pair<int, int> MIDIMappingDialog::guess_offset(unsigned bus_idx, MIDIMappingDial
                        }
                        continue;
                }
-               if (source_spinner->value() == 0) {
+               if (source_spinner->value() == -1) {
                        // The bus has a controller set that the source bus doesn't set.
                        return not_found;
                }
@@ -548,7 +548,7 @@ bool MIDIMappingDialog::bus_is_empty(unsigned bus_idx, SpinnerGroup spinner_grou
                    spinner_group != this_spinner_group) {
                        continue;
                }
-               if (spinner->value() != 0) {
+               if (spinner->value() != -1) {
                        return false;
                }
        }