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50 | |
51 | #include "window.h" |
52 | #include <QtWidgets> |
53 | |
54 | //! [Window constructor start] |
55 | Window::Window(QWidget *parent) |
56 | : QWidget(parent), thread(new RenderThread(this)) |
57 | { |
58 | //! [Window constructor start] //! [set up widgets and connections] |
59 | |
60 | label = new QLabel(this); |
61 | label->setAlignment(Qt::AlignCenter); |
62 | |
63 | loadButton = new QPushButton(tr(s: "&Load image..." ), this); |
64 | resetButton = new QPushButton(tr(s: "&Stop" ), this); |
65 | resetButton->setEnabled(false); |
66 | |
67 | connect(sender: loadButton, signal: &QPushButton::clicked, |
68 | receiver: this, slot: QOverload<>::of(ptr: &Window::loadImage)); |
69 | connect(sender: resetButton, signal: &QPushButton::clicked, |
70 | receiver: thread, slot: &RenderThread::stopProcess); |
71 | connect(sender: thread, signal: &RenderThread::finished, |
72 | receiver: this, slot: &Window::resetUi); |
73 | //! [set up widgets and connections] //! [connecting signal with custom type] |
74 | connect(sender: thread, signal: &RenderThread::sendBlock, |
75 | receiver: this, slot: &Window::addBlock); |
76 | //! [connecting signal with custom type] |
77 | |
78 | QHBoxLayout *buttonLayout = new QHBoxLayout; |
79 | buttonLayout->addStretch(); |
80 | buttonLayout->addWidget(loadButton); |
81 | buttonLayout->addWidget(resetButton); |
82 | buttonLayout->addStretch(); |
83 | |
84 | QVBoxLayout *layout = new QVBoxLayout(this); |
85 | layout->addWidget(label); |
86 | layout->addLayout(layout: buttonLayout); |
87 | |
88 | //! [Window constructor finish] |
89 | setWindowTitle(tr(s: "Queued Custom Type" )); |
90 | } |
91 | //! [Window constructor finish] |
92 | |
93 | void Window::loadImage() |
94 | { |
95 | QStringList formats; |
96 | const QList<QByteArray> supportedFormats = QImageReader::supportedImageFormats(); |
97 | for (const QByteArray &format : supportedFormats) |
98 | if (format.toLower() == format) |
99 | formats.append(t: QLatin1String("*." ) + QString::fromLatin1(str: format)); |
100 | |
101 | QString newPath = QFileDialog::getOpenFileName(parent: this, caption: tr(s: "Open Image" ), |
102 | dir: path, filter: tr(s: "Image files (%1)" ).arg(a: formats.join(sep: ' '))); |
103 | |
104 | if (newPath.isEmpty()) |
105 | return; |
106 | |
107 | QImage image(newPath); |
108 | if (!image.isNull()) { |
109 | loadImage(image); |
110 | path = newPath; |
111 | } |
112 | } |
113 | |
114 | void Window::loadImage(const QImage &image) |
115 | { |
116 | QImage useImage; |
117 | QRect space = QGuiApplication::primaryScreen()->availableGeometry(); |
118 | if (image.width() > 0.75*space.width() || image.height() > 0.75*space.height()) |
119 | useImage = image.scaled(w: 0.75*space.width(), h: 0.75*space.height(), |
120 | aspectMode: Qt::KeepAspectRatio, mode: Qt::SmoothTransformation); |
121 | else |
122 | useImage = image; |
123 | |
124 | pixmap = QPixmap(useImage.width(), useImage.height()); |
125 | pixmap.fill(fillColor: qRgb(r: 255, g: 255, b: 255)); |
126 | label->setPixmap(pixmap); |
127 | loadButton->setEnabled(false); |
128 | resetButton->setEnabled(true); |
129 | thread->processImage(image: useImage); |
130 | } |
131 | |
132 | //! [Adding blocks to the display] |
133 | void Window::addBlock(const Block &block) |
134 | { |
135 | QColor color = block.color(); |
136 | color.setAlpha(64); |
137 | |
138 | QPainter painter; |
139 | painter.begin(&pixmap); |
140 | painter.fillRect(block.rect(), color); |
141 | painter.end(); |
142 | label->setPixmap(pixmap); |
143 | } |
144 | //! [Adding blocks to the display] |
145 | |
146 | void Window::resetUi() |
147 | { |
148 | loadButton->setEnabled(true); |
149 | resetButton->setEnabled(false); |
150 | } |
151 | |