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50
51#include "informationwindow.h"
52#include "imageitem.h"
53#include "view.h"
54
55//! [0]
56View::View(const QString &items, const QString &images, QWidget *parent)
57 : QGraphicsView(parent)
58{
59 itemTable = new QSqlRelationalTableModel(this);
60 itemTable->setTable(items);
61 itemTable->setRelation(1, QSqlRelation(images, "itemid", "file"));
62 itemTable->select();
63//! [0]
64
65//! [1]
66 scene = new QGraphicsScene(this);
67 scene->setSceneRect(0, 0, 465, 365);
68 setScene(scene);
69
70 addItems();
71
72 setMinimumSize(470, 370);
73 setMaximumSize(470, 370);
74
75 QLinearGradient gradient(QPointF(0, 0), QPointF(0, 370));
76 gradient.setColorAt(0, QColor("#868482"));
77 gradient.setColorAt(1, QColor("#5d5b59"));
78 setBackgroundBrush(gradient);
79}
80//! [1]
81
82//! [3]
83void View::addItems()
84{
85 int itemCount = itemTable->rowCount();
86
87 int imageOffset = 150;
88 int leftMargin = 70;
89 int topMargin = 40;
90
91 for (int i = 0; i < itemCount; i++) {
92 QSqlRecord record = itemTable->record(i);
93
94 int id = record.value("id").toInt();
95 QString file = record.value("file").toString();
96 QString item = record.value("itemtype").toString();
97
98 int columnOffset = ((i % 2) * 37);
99 int x = ((i % 2) * imageOffset) + leftMargin + columnOffset;
100 int y = ((i / 2) * imageOffset) + topMargin;
101
102 ImageItem *image = new ImageItem(id, QPixmap(":/" + file));
103 image->setData(0, i);
104 image->setPos(x, y);
105 scene->addItem(image);
106
107 QGraphicsTextItem *label = scene->addText(item);
108 label->setDefaultTextColor(QColor("#d7d6d5"));
109 QPointF labelOffset((120 - label->boundingRect().width()) / 2, 120.0);
110 label->setPos(QPointF(x, y) + labelOffset);
111 }
112}
113//! [3]
114
115//! [5]
116void View::mouseReleaseEvent(QMouseEvent *event)
117{
118 if (QGraphicsItem *item = itemAt(event->position().toPoint())) {
119 if (ImageItem *image = qgraphicsitem_cast<ImageItem *>(item))
120 showInformation(image);
121 }
122 QGraphicsView::mouseReleaseEvent(event);
123}
124//! [5]
125
126//! [6]
127void View::showInformation(ImageItem *image)
128{
129 int id = image->id();
130 if (id < 0 || id >= itemTable->rowCount())
131 return;
132
133 InformationWindow *window = findWindow(id);
134 if (!window) {
135 window = new InformationWindow(id, itemTable, this);
136
137 connect(window, QOverload<int,const QString &>::of(&InformationWindow::imageChanged),
138 this, QOverload<int,const QString &>::of(&View::updateImage));
139
140 window->move(pos() + QPoint(20, 40));
141 window->show();
142 informationWindows.append(window);
143 }
144
145 if (window->isVisible()) {
146 window->raise();
147 window->activateWindow();
148 } else
149 window->show();
150}
151//! [6]
152
153//! [7]
154void View::updateImage(int id, const QString &fileName)
155{
156 QList<QGraphicsItem *> items = scene->items();
157
158 while(!items.empty()) {
159 QGraphicsItem *item = items.takeFirst();
160
161 if (ImageItem *image = qgraphicsitem_cast<ImageItem *>(item)) {
162 if (image->id() == id){
163 image->setPixmap(QPixmap(":/" +fileName));
164 image->adjust();
165 break;
166 }
167 }
168 }
169}
170//! [7]
171
172//! [8]
173InformationWindow *View::findWindow(int id) const
174{
175 for (auto window : informationWindows) {
176 if (window && (window->id() == id))
177 return window;
178 }
179 return nullptr;
180}
181//! [8]
182
183