RedPanda-CPP/RedPandaIDE/widgets/customdisablediconengine.cpp

#include "customdisablediconengine.h"

#include <QImage>
#include <QPainter>
#include <QPixmap>
#include <QDebug>

CustomDisabledIconEngine::CustomDisabledIconEngine()
{

}

void CustomDisabledIconEngine::paint(QPainter *painter, const QRect &rect, QIcon::Mode mode, QIcon::State state)
{
//    if (mode == QIcon::Active && state == QIcon::On)
//        painter->drawPixmap(rect,mPixmap);
//    else
//        painter->drawPixmap(rect,mDisabledPixmap);
}

QIconEngine *CustomDisabledIconEngine::clone() const
{
    CustomDisabledIconEngine* eng = new CustomDisabledIconEngine();
    eng->mPixmap = mPixmap;
    eng->mDisabledPixmap = mDisabledPixmap;
    return eng;
}

QPixmap CustomDisabledIconEngine::pixmap(const QSize &size, QIcon::Mode mode, QIcon::State state)
{
    if (mode == QIcon::Mode::Disabled)
        return mDisabledPixmap;
    else
        return mPixmap;
}

void CustomDisabledIconEngine::addPixmap(const QPixmap &pixmap, QIcon::Mode mode, QIcon::State state)
{
    setPixmap(pixmap);
}

void CustomDisabledIconEngine::addFile(const QString &fileName, const QSize &size, QIcon::Mode mode, QIcon::State state)
{
    setPixmap(QPixmap(fileName));
}

void CustomDisabledIconEngine::setPixmap(const QPixmap &pixmap)
{
    mPixmap = pixmap;
    if (pixmap.isNull())
        mDisabledPixmap = pixmap;
    else {
        QImage oldImage = mPixmap.toImage();
        QImage image(mPixmap.size(), QImage::Format_ARGB32);
        for (int x=0;x<image.width();x++) {
            for (int y=0;y<image.height();y++) {
                QColor c = oldImage.pixelColor(x,y);
                int gray = 0.299 * c.red() + 0.587 * c.green() + 0.114 * c.blue();
                QColor c2(gray,gray,gray,c.alpha());
                c2 = c2.darker();
                image.setPixelColor(x,y,c2);
            }
        }
        mDisabledPixmap = QPixmap::fromImage(image);

    }
}