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// 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]
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