window.cpp 范例文件

richtext/textobject/window.cpp
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#include <QtWidgets> #include <QtSvg> #include "window.h" #include "svgtextobject.h" Window::Window() { setupGui(); setupTextObject(); setWindowTitle("Text Object Example"); } void Window::insertTextObject() { QString fileName = fileNameLineEdit->text(); QFile file(fileName); if (!file.open(QIODevice::ReadOnly)) { QMessageBox::warning(this, tr("Error Opening File"), tr("Could not open '%1'").arg(fileName)); } QByteArray svgData = file.readAll(); QTextCharFormat svgCharFormat; svgCharFormat.setObjectType(SvgTextFormat); QSvgRenderer renderer(svgData); QImage svgBufferImage(renderer.defaultSize(), QImage::Format_ARGB32); QPainter painter(&svgBufferImage); renderer.render(&painter, svgBufferImage.rect()); svgCharFormat.setProperty(SvgData, svgBufferImage); QTextCursor cursor = textEdit->textCursor(); cursor.insertText(QString(QChar::ObjectReplacementCharacter), svgCharFormat); textEdit->setTextCursor(cursor); } void Window::setupTextObject() { QObject *svgInterface = new SvgTextObject; svgInterface->setParent(this); textEdit->document()->documentLayout()->registerHandler(SvgTextFormat, svgInterface); } void Window::setupGui() { fileNameLabel = new QLabel(tr("Svg File Name:")); fileNameLineEdit = new QLineEdit; insertTextObjectButton = new QPushButton(tr("Insert Image")); fileNameLineEdit->setText(":/files/heart.svg"); connect(insertTextObjectButton, SIGNAL(clicked()), this, SLOT(insertTextObject())); QHBoxLayout *bottomLayout = new QHBoxLayout; bottomLayout->addWidget(fileNameLabel); bottomLayout->addWidget(fileNameLineEdit); bottomLayout->addWidget(insertTextObjectButton); textEdit = new QTextEdit; QVBoxLayout *mainLayout = new QVBoxLayout; mainLayout->addWidget(textEdit); mainLayout->addLayout(bottomLayout); setLayout(mainLayout); }