ecvProgressDialog.cpp

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// ----------------------------------------------------------------------------
// -                        CloudViewer: www.cloudViewer.org                  -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2024 www.cloudViewer.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
 
#include "ecvProgressDialog.h"
 
// Qt
#include <QCoreApplication>
#include <QProgressBar>
#include <QPushButton>
 
ecvProgressDialog::ecvProgressDialog(bool showCancelButton,
                                     QWidget* parent /*=0*/)
    : QProgressDialog(parent), m_currentValue(0), m_lastRefreshValue(-1) {
    setAutoClose(true);
 
    resize(400, 200);
    setRange(0, 100);
    setMinimumWidth(400);
 
    QPushButton* cancelButton = 0;
    if (showCancelButton) {
        cancelButton = new QPushButton("Cancel");
        cancelButton->setDefault(false);
        cancelButton->setFocusPolicy(Qt::NoFocus);
    }
    setCancelButton(cancelButton);
 
    connect(this, &ecvProgressDialog::scheduleRefresh, this,
            &ecvProgressDialog::refresh,
            Qt::QueuedConnection);  // can't use DirectConnection here!
}
 
void ecvProgressDialog::refresh() {
    int value = m_currentValue;
    if (m_lastRefreshValue != value) {
        m_lastRefreshValue = value;
        setValue(value);  // See Qt doc: if the progress dialog is modal,
                          // setValue() calls QApplication::processEvents()
    }
}
 
void ecvProgressDialog::update(float percent) {
    // thread-safe
    int value = static_cast<int>(percent);
    if (value != m_currentValue) {
        m_currentValue = value;
        emit scheduleRefresh();
        QCoreApplication::processEvents();  // we let the main thread breath (so
                                            // that the call to 'refresh' can be
                                            // performed)
    }
}
 
void ecvProgressDialog::setMethodTitle(QString methodTitle) {
    setWindowTitle(methodTitle);
}
 
void ecvProgressDialog::setInfo(QString infoStr) {
    setLabelText(infoStr);
    if (isVisible()) {
        QProgressDialog::update();
        QCoreApplication::processEvents();
    }
}
 
void ecvProgressDialog::start() {
    m_lastRefreshValue = -1;
    show();
    QCoreApplication::processEvents();
}
 
void ecvProgressDialog::stop() {
    hide();
    QCoreApplication::processEvents();
}