Line data    Source code

       1              : // SPDX-FileCopyrightText: 2016 Anne Jan Brouwer
       2              : // SPDX-License-Identifier: GPL-3.0-or-later
       3              : /*
       4              :  * This code is based on https://github.com/mojocorp/QProgressIndicator
       5              :  * and published under
       6              :  *
       7              :  * The MIT License (MIT)
       8              :  *
       9              :  * Copyright (c) 2011 Morgan Leborgne
      10              :  *
      11              :  * Permission is hereby granted, free of charge, to any person obtaining a copy
      12              :  * of this software and associated documentation files (the "Software"), to deal
      13              :  * in the Software without restriction, including without limitation the rights
      14              :  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
      15              :  * copies of the Software, and to permit persons to whom the Software is
      16              :  * furnished to do so, subject to the following conditions:
      17              :  *
      18              :  * The above copyright notice and this permission notice shall be included in
      19              :  * all copies or substantial portions of the Software.
      20              :  *
      21              :  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
      22              :  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      23              :  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
      24              :  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      25              :  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
      26              :  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
      27              :  * SOFTWARE.
      28              :  */
      29              : #include "qprogressindicator.h"
      30              : #include <QPainter>
      31              : 
      32              : /**
      33              :  * @brief QProgressIndicator::QProgressIndicator constructor.
      34              :  * @param parent widget the indicator is placed in.
      35              :  */
      36            0 : QProgressIndicator::QProgressIndicator(QWidget *parent)
      37            0 :     : QWidget(parent), m_angle(0), m_timerId(-1), m_delay(40),
      38            0 :       m_displayedWhenStopped(false), m_color(Qt::black) {
      39            0 :   setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
      40            0 :   setFocusPolicy(Qt::NoFocus);
      41            0 : }
      42              : 
      43            0 : auto QProgressIndicator::isAnimated() const -> bool { return m_timerId != -1; }
      44              : 
      45            0 : void QProgressIndicator::setDisplayedWhenStopped(bool state) {
      46            0 :   m_displayedWhenStopped = state;
      47              : 
      48            0 :   update();
      49            0 : }
      50              : 
      51            0 : auto QProgressIndicator::isDisplayedWhenStopped() const -> bool {
      52            0 :   return m_displayedWhenStopped;
      53              : }
      54              : 
      55            0 : void QProgressIndicator::startAnimation() {
      56            0 :   m_angle = 0;
      57              : 
      58            0 :   if (m_timerId == -1) {
      59            0 :     m_timerId = startTimer(m_delay);
      60              :   }
      61            0 : }
      62              : 
      63            0 : void QProgressIndicator::stopAnimation() {
      64            0 :   if (m_timerId != -1) {
      65            0 :     killTimer(m_timerId);
      66              :   }
      67              : 
      68            0 :   m_timerId = -1;
      69              : 
      70            0 :   update();
      71            0 : }
      72              : 
      73            0 : void QProgressIndicator::setAnimationDelay(int delay) {
      74            0 :   if (m_timerId != -1) {
      75            0 :     killTimer(m_timerId);
      76              :   }
      77              : 
      78            0 :   m_delay = delay;
      79              : 
      80            0 :   if (m_timerId != -1) {
      81            0 :     m_timerId = startTimer(m_delay);
      82              :   }
      83            0 : }
      84              : 
      85            0 : void QProgressIndicator::setColor(const QColor &color) {
      86            0 :   m_color = color;
      87              : 
      88            0 :   update();
      89            0 : }
      90              : 
      91              : /**
      92              :  * @brief QProgressIndicator::sizeHint default minimum size.
      93              :  * @return QSize(20, 20)
      94              :  */
      95            0 : auto QProgressIndicator::sizeHint() const -> QSize { return {20, 20}; }
      96              : 
      97              : /**
      98              :  * @brief QProgressIndicator::heightForWidth square ratio.
      99              :  * @param w requested width
     100              :  * @return w returned height
     101              :  */
     102            0 : auto QProgressIndicator::heightForWidth(int w) const -> int { return w; }
     103              : 
     104              : /**
     105              :  * @brief QProgressIndicator::timerEvent do the actual animation.
     106              :  */
     107            0 : void QProgressIndicator::timerEvent(QTimerEvent * /*event*/) {
     108            0 :   m_angle = (m_angle + 30) % 360;
     109              : 
     110            0 :   update();
     111            0 : }
     112              : 
     113              : /**
     114              :  * @brief QProgressIndicator::paintEvent draw the spinner.
     115              :  */
     116            0 : void QProgressIndicator::paintEvent(QPaintEvent * /*event*/) {
     117            0 :   if (!m_displayedWhenStopped && !isAnimated()) {
     118            0 :     return;
     119              :   }
     120              : 
     121              :   int width = qMin(this->width(), this->height());
     122              : 
     123            0 :   QPainter p(this);
     124            0 :   p.setRenderHint(QPainter::Antialiasing);
     125              : 
     126            0 :   auto outerRadius = int((width - 1) * 0.5);
     127            0 :   auto innerRadius = int((width - 1) * 0.5 * 0.38);
     128              : 
     129            0 :   int capsuleHeight = outerRadius - innerRadius;
     130              :   int capsuleWidth =
     131            0 :       (width > 32) ? int(capsuleHeight * 0.23) : int(capsuleHeight * 0.35);
     132            0 :   int capsuleRadius = capsuleWidth / 2;
     133              : 
     134            0 :   for (int i = 0; i < 12; ++i) {
     135            0 :     QColor color = m_color;
     136            0 :     color.setAlphaF(int(1.0f - (i / 12.0f)));
     137            0 :     p.setPen(Qt::NoPen);
     138            0 :     p.setBrush(color);
     139            0 :     p.save();
     140            0 :     p.translate(rect().center());
     141            0 :     p.rotate(int(m_angle - i * 30.0f));
     142            0 :     p.drawRoundedRect(int(-capsuleWidth * 0.5), -(innerRadius + capsuleHeight),
     143              :                       capsuleWidth, capsuleHeight, capsuleRadius,
     144              :                       capsuleRadius);
     145            0 :     p.restore();
     146              :   }
     147            0 : }