gui/forms/promoted/cpaletteitem.cpp - devOpt - ArtemNech/simpleOpenGL

gui/forms/promoted/cpaletteitem.cpp
118 строк3 KB
Artem Nechitaylenko
Qt GUI isolated from backend except QEvent. Need fix
18 май 2026, 13:41
18 май 2026, 13:41f09d1f2
#include "cpaletteitem.h"
#include "../../../backend/diagram/CDiagram.h"
#include <QListWidgetItem>
#include <QBuffer>
#include <QDrag>
#include <QDragEnterEvent>
#include <qpainter.h>

CPaletteItem::CPaletteItem(QWidget *parent)
    : QListWidget(parent)
{
    setSelectionMode(QAbstractItemView::SingleSelection);

    setDragDropMode(QAbstractItemView::DragOnly);
    setDefaultDropAction(Qt::IgnoreAction);

    setSelectionMode(QAbstractItemView::SingleSelection);
    setDragEnabled(true);
    setDragDropMode(QAbstractItemView::DragOnly);
    setDefaultDropAction(Qt::IgnoreAction);

    setAcceptDrops(false);
    setDropIndicatorShown(false);


    /*
    setIconSize(QSize(32, 32));
    setViewMode(QListView::ListMode);
    setMovement(QListView::Static);
    setSpacing(5);*/

    fillPalettePage();
}

CPaletteItem::~CPaletteItem()
{

}

QMimeData *CPaletteItem::mimeData(const QList<QListWidgetItem *> &items) const
{
    if (items.isEmpty())
        return nullptr;

    QListWidgetItem *item = items.first();
    auto *mimeData = new QMimeData();
    mimeData->setProperty("source", "palette");
    int comp_type = item->data(Qt::UserRole).toInt();
    mimeData->setProperty("comp_type", comp_type);
    mimeData->setText(item->text());

    if (!item->icon().isNull())
    {
        QPixmap pixmap = item->icon().pixmap(32, 32);
        QByteArray byteArray;
        QBuffer buffer(&byteArray);
        buffer.open(QIODevice::WriteOnly);
        pixmap.save(&buffer, "PNG");
        mimeData->setData("application/x-icon", byteArray);
    }

    mimeData->setData("application/x-item-type", item->data(Qt::UserRole).toByteArray());

    return mimeData;
}

void CPaletteItem::startDrag(Qt::DropActions supportedActions)
{
    QListWidgetItem *item = currentItem();
    if (!item)
        return;

    QDrag *drag = new QDrag(this);
    drag->setMimeData(mimeData(QList<QListWidgetItem*>() << item));

    // Создаем пиксельную карту для перетаскивания
    QPixmap pixmap = item->icon().pixmap(32, 32);
    if (pixmap.isNull())
    {
        // Если нет иконки, создаем с текстом
        QFontMetrics fm(font());
        int width = fm.horizontalAdvance(item->text()) + 20;
        pixmap = QPixmap(width, 30);
        pixmap.fill(Qt::lightGray);
        QPainter painter(&pixmap);
        painter.drawText(pixmap.rect(), Qt::AlignCenter, item->text());
    }

    drag->setPixmap(pixmap);
    drag->setHotSpot(QPoint(pixmap.width() / 2, pixmap.height() / 2));

    // Запускаем drag
    drag->exec(supportedActions, Qt::CopyAction);
}

void CPaletteItem::dragEnterEvent(QDragEnterEvent *event)
{
    event->ignore();
}

void CPaletteItem::dragMoveEvent(QDragMoveEvent *event)
{
    event->ignore();
}

void CPaletteItem::dropEvent(QDropEvent *event)
{
    event->ignore();
}

void CPaletteItem::fillPalettePage()
{
    for (uint8_t i = 1; i < DT_COUNT; i++)
    {
        auto item = new QListWidgetItem(QIcon(icons.at(i)), names[i], this);
        item->setData(Qt::UserRole, i);
    }
}