Revision control
++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include "informationwindow.h"
++ #include "imageitem.h"
++ #include "view.h"
++
++ //! [0]
++ View::View(const QString &items, const QString &images, QWidget *parent)
++ : QGraphicsView(parent)
++ {
++ itemTable = new QSqlRelationalTableModel(this);
++ itemTable->setTable(items);
++ itemTable->setRelation(1, QSqlRelation(images, "itemid", "file"));
++ itemTable->select();
++ //! [0]
++
++ //! [1]
++ scene = new QGraphicsScene(this);
++ scene->setSceneRect(0, 0, 465, 365);
++ setScene(scene);
++
++ addItems();
++
++ setMinimumSize(470, 370);
++ setMaximumSize(470, 370);
++
++ QLinearGradient gradient(QPointF(0, 0), QPointF(0, 370));
++ gradient.setColorAt(0, QColor("#868482"));
++ gradient.setColorAt(1, QColor("#5d5b59"));
++ setBackgroundBrush(gradient);
++ }
++ //! [1]
++
++ //! [3]
++ void View::addItems()
++ {
++ int itemCount = itemTable->rowCount();
++
++ int imageOffset = 150;
++ int leftMargin = 70;
++ int topMargin = 40;
++
++ for (int i = 0; i < itemCount; i++) {
++ QSqlRecord record = itemTable->record(i);
++
++ int id = record.value("id").toInt();
++ QString file = record.value("file").toString();
++ QString item = record.value("itemtype").toString();
++
++ int columnOffset = ((i % 2) * 37);
++ int x = ((i % 2) * imageOffset) + leftMargin + columnOffset;
++ int y = ((i / 2) * imageOffset) + topMargin;
++
++ ImageItem *image = new ImageItem(id, QPixmap(":/" + file));
++ image->setData(0, i);
++ image->setPos(x, y);
++ scene->addItem(image);
++
++ QGraphicsTextItem *label = scene->addText(item);
++ label->setDefaultTextColor(QColor("#d7d6d5"));
++ QPointF labelOffset((120 - label->boundingRect().width()) / 2, 120.0);
++ label->setPos(QPointF(x, y) + labelOffset);
++ }
++ }
++ //! [3]
++
++ //! [5]
++ void View::mouseReleaseEvent(QMouseEvent *event)
++ {
++ if (QGraphicsItem *item = itemAt(event->position().toPoint())) {
++ if (ImageItem *image = qgraphicsitem_cast<ImageItem *>(item))
++ showInformation(image);
++ }
++ QGraphicsView::mouseReleaseEvent(event);
++ }
++ //! [5]
++
++ //! [6]
++ void View::showInformation(ImageItem *image)
++ {
++ int id = image->id();
++ if (id < 0 || id >= itemTable->rowCount())
++ return;
++
++ InformationWindow *window = findWindow(id);
++ if (!window) {
++ window = new InformationWindow(id, itemTable, this);
++
++ connect(window, &InformationWindow::imageChanged,
++ this, &View::updateImage);
++
++ window->move(pos() + QPoint(20, 40));
++ window->show();
++ informationWindows.append(window);
++ }
++
++ if (window->isVisible()) {
++ window->raise();
++ window->activateWindow();
++ } else
++ window->show();
++ }
++ //! [6]
++
++ //! [7]
++ void View::updateImage(int id, const QString &fileName)
++ {
++ QList<QGraphicsItem *> items = scene->items();
++
++ while(!items.empty()) {
++ QGraphicsItem *item = items.takeFirst();
++
++ if (ImageItem *image = qgraphicsitem_cast<ImageItem *>(item)) {
++ if (image->id() == id){
++ image->setPixmap(QPixmap(":/" +fileName));
++ image->adjust();
++ break;
++ }
++ }
++ }
++ }
++ //! [7]
++
++ //! [8]
++ InformationWindow *View::findWindow(int id) const
++ {
++ for (auto window : informationWindows) {
++ if (window && (window->id() == id))
++ return window;
++ }
++ return nullptr;
++ }
++ //! [8]
++