342 lines
8.9 KiB
C++
342 lines
8.9 KiB
C++
/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2019 Olive Team
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "labelslider.h"
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#include "project/undo.h"
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#include "panels/viewer.h"
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#include "io/config.h"
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#include "io/math.h"
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#include "debug.h"
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#include <QMouseEvent>
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#include <QInputDialog>
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#include <QApplication>
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LabelSlider::LabelSlider(QWidget* parent) : QLabel(parent) {
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// set a default frame rate - fallback, shouldn't ever really be used
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frame_rate = 30;
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decimal_places = 1;
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drag_start = false;
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drag_proc = false;
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min_enabled = false;
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max_enabled = false;
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set_color();
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set_default_cursor();
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internal_value = -1;
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set = false;
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display_type = LABELSLIDER_NORMAL;
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set_default_value(0);
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}
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void LabelSlider::set_frame_rate(double d) {
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frame_rate = d;
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}
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void LabelSlider::set_display_type(int type) {
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display_type = type;
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setText(valueToString());
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}
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void LabelSlider::set_value(double v, bool userSet) {
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set = true;
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if (!qFuzzyCompare(v, internal_value)) {
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if (min_enabled && v < min_value) {
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internal_value = min_value;
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} else if (max_enabled && v > max_value) {
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internal_value = max_value;
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} else {
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internal_value = v;
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}
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setText(valueToString());
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if (userSet) emit valueChanged();
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}
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}
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bool LabelSlider::is_set() {
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return set;
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}
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bool LabelSlider::is_dragging() {
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return drag_proc;
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}
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QString LabelSlider::valueToString() {
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double v = internal_value;
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if (qIsNaN(v)) {
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return "---";
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} else {
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switch (display_type) {
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case LABELSLIDER_FRAMENUMBER:
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return frame_to_timecode(long(v), olive::CurrentConfig.timecode_view, frame_rate);
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case LABELSLIDER_PERCENT:
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return QString::number((v*100), 'f', decimal_places).append("%");
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case LABELSLIDER_DECIBEL:
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{
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QString db_str;
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// -96 dB is considered -infinity
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if (amplitude_to_db(v) <= -96) {
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// hex sequence for -infinity
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db_str = "-\xE2\x88\x9E";
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} else {
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db_str = QString::number(amplitude_to_db(v), 'f', decimal_places);
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}
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// add "dB" suffix
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db_str.append(" dB");
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return db_str;
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}
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}
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return QString::number(v, 'f', decimal_places);
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}
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}
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double LabelSlider::getPreviousValue() {
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return previous_value;
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}
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void LabelSlider::set_previous_value() {
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previous_value = internal_value;
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}
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void LabelSlider::set_color(QString c) {
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if (c.isEmpty()) c = "#ffc000";
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setStyleSheet("QLabel{color:" + c + ";text-decoration:underline;}QLabel:disabled{color:#808080;}");
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}
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double LabelSlider::value() {
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return internal_value;
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}
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void LabelSlider::set_default_value(double v) {
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default_value = v;
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if (!set) {
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set_value(v, false);
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set = false;
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}
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}
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void LabelSlider::set_minimum_value(double v) {
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min_value = v;
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min_enabled = true;
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}
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void LabelSlider::set_maximum_value(double v) {
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max_value = v;
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max_enabled = true;
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}
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void LabelSlider::mousePressEvent(QMouseEvent *ev) {
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// if primary button is clicked
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if (ev->button() == Qt::LeftButton && !drag_start) {
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// store initial value to be compared while dragging
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drag_start_value = internal_value;
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// alt + click sets labelslider to default value
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if (ev->modifiers() & Qt::AltModifier) {
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// if the value is not already default, and there is a default to set
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if (!qFuzzyCompare(internal_value, default_value)
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&& !qIsNaN(default_value)) {
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// cache current value
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set_previous_value();
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// set back to default
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set_value(default_value, true);
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}
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} else {
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// if value isn't valid, we set to a "default" of 0
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if (qIsNaN(internal_value)) internal_value = 0;
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// hide the cursor and store information about it for dragging
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set_active_cursor();
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drag_start = true;
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drag_start_x = cursor().pos().x();
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drag_start_y = cursor().pos().y();
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}
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emit clicked();
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} else {
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// handler if the user clicks with a non-primary button
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// prevents mouse from getting stuck in "dragging" mode
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mouseReleaseEvent(ev);
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}
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}
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void LabelSlider::mouseMoveEvent(QMouseEvent* event) {
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if (drag_start) {
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// if we're dragging
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// we don't actually start fully dragging until the cursor has moved
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// while the mouse is down, this helps prevent accidental drags
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drag_proc = true;
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// get amount cursor moved by
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double diff = (cursor().pos().x()-drag_start_x) + (drag_start_y-cursor().pos().y());
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// ctrl + drag drags in smaller increments
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if (event->modifiers() & Qt::ControlModifier) diff *= 0.01;
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if (display_type == LABELSLIDER_PERCENT) {
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// we'll also need to drag in smaller increments for a percent value
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diff *= 0.01;
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}
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// determine what the new value will be
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double new_value;
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if (display_type == LABELSLIDER_DECIBEL) {
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// we move in terms of dB for decibel display
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new_value = db_to_amplitude(amplitude_to_db(internal_value) + diff);
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} else {
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// for most display types, just add the mouse difference
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new_value = internal_value + diff;
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}
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// set internal value
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set_value(new_value, true);
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// keep the cursor in the same location while dragging
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cursor().setPos(drag_start_x, drag_start_y);
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}
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}
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void LabelSlider::mouseReleaseEvent(QMouseEvent*) {
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if (drag_start) {
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// unhide cursor
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set_default_cursor();
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drag_start = false;
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if (drag_proc) {
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// if we just finished fully dragging
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drag_proc = false;
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previous_value = drag_start_value;
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emit valueChanged();
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} else {
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// if the user didn't actually drag, and just clicked in one place,
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// we instead present a dialog prompt for the user to enter a
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// specific value
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double d = internal_value;
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if (display_type == LABELSLIDER_FRAMENUMBER) {
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// ask the user to enter a timecode
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QString s = QInputDialog::getText(
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this,
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tr("Set Value"),
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tr("New value:"),
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QLineEdit::Normal,
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valueToString()
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);
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if (s.isEmpty()) return;
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// parse string timecode to a frame number
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d = timecode_to_frame(s, olive::CurrentConfig.timecode_view, frame_rate);
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} else {
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// ask the user to enter a normal number value
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bool ok;
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// value to show
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double shown_value = internal_value;
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if (display_type == LABELSLIDER_PERCENT) {
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shown_value *= 100;
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} else if (display_type == LABELSLIDER_DECIBEL) {
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shown_value = amplitude_to_db(shown_value);
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}
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// set correct minimum value
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double shown_minimum_value;
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if (min_enabled) {
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// if this field has a minimum value set, use it
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shown_minimum_value = min_value;
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} else if (display_type == LABELSLIDER_DECIBEL) {
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// minimum decibel amount is -96db
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shown_minimum_value = -96;
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} else {
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// lowest possible minimum integer
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shown_minimum_value = INT_MIN;
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}
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// percentages are stored 0.0 - 1.0 but displayed as 0% - 100%
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d = QInputDialog::getDouble(
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this,
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tr("Set Value"),
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tr("New value:"),
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shown_value,
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shown_minimum_value,
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(max_enabled) ? max_value : INT_MAX,
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decimal_places,
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&ok
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);
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if (!ok) return;
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// convert shown value back to internal value
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if (display_type == LABELSLIDER_PERCENT) {
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d *= 0.01;
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} else if (display_type == LABELSLIDER_DECIBEL) {
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d = db_to_amplitude(d);
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}
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}
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// if the value actually changed, trigger a change event
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if (!qFuzzyCompare(d, internal_value)) {
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set_previous_value();
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set_value(d, true);
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}
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}
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}
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}
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void LabelSlider::set_default_cursor() {
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setCursor(Qt::SizeHorCursor);
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}
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void LabelSlider::set_active_cursor() {
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setCursor(Qt::BlankCursor);
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}
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