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| ** This file is part of the examples of the Qt Toolkit. |
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| |
| #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->pos())) { |
| 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, QOverload<int,const QString &>::of(&InformationWindow::imageChanged), |
| this, QOverload<int,const QString &>::of(&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] |
| |