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update_steps(), properly handle integer ranges

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This commit is contained in:
Robin Gareus 2014-11-30 15:02:53 +01:00
parent bd85c8ec43
commit 0622fc9d4b
1 changed files with 16 additions and 12 deletions
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28
libs/ardour/ardour/parameter_descriptor.h
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@ -47,9 +47,9 @@ struct ParameterDescriptor
, normal(parameter.normal())
, lower(parameter.min())
, upper(parameter.max())
, step((upper - lower) / 100.0f)
, smallstep((upper - lower) / 1000.0f)
, largestep((upper - lower) / 10.0f)
, step(0)
, smallstep(0)
, largestep(0)
, integer_step(parameter.type() >= MidiCCAutomation &&
parameter.type() <= MidiChannelPressureAutomation)
, toggled(parameter.toggled())
@ -62,6 +62,7 @@ struct ParameterDescriptor
if (parameter.type() == GainAutomation) {
unit = DB;
}
update_steps();
}
ParameterDescriptor()
@ -83,24 +84,27 @@ struct ParameterDescriptor
, enumeration(false)
{}
/// Set step, smallstep, and largestep, based on current description
/* Set step, smallstep, and largestep, based on current description */
void update_steps() {
if (unit == ParameterDescriptor::MIDI_NOTE) {
step = smallstep = 1; // semitone
largestep = 12; // octave
} else {
} else if (integer_step) {
const float delta = upper - lower;
step = delta / 1000.0f;
smallstep = delta / 10000.0f;
largestep = delta / 10.0f;
step = delta / 1000.0f;
largestep = delta / 40.0f;
if (integer_step) {
step = rint(step);
largestep = rint(largestep);
// leave smallstep alone for fine tuning
}
smallstep = std::max(1.0, rint(smallstep));
step = std::max(1.0, rint(step));
largestep = std::max(1.0, rint(largestep));
}
/* else: leave all others as default '0'
* in that case the UI (eg. AutomationController::create)
* uses internal_to_interface() to map the value
* to an appropriate interface range
*/
}
std::string label;