DiagramDesigner/diagramCavas/source/graphicsItem/handleText.cpp

#include "graphicsItem/handleText.h"
#include <QPainter>
#include <QLineEdit>
#include <QGraphicsProxyWidget>

HandleText::HandleText(QGraphicsItem *parent)
    : ItemControlHandle(parent)
    ,_font(QFont())
    ,_proxy(nullptr)
    ,_nIndex(-1)
    ,_type(0)
{
    _editable = true;
    _boundingRect = QRectF(-TEXT_WIDTH*0.5,-TEXT_WIDTH*0.5,TEXT_WIDTH,TEXT_HEIGHT);
}

HandleText::~HandleText()
{
}

void HandleText::setText(QString str)
{
    _text = str;
    QFontMetrics fontMetrics(_font);
    _boundingRect = fontMetrics.boundingRect(_text);
    int w = _boundingRect.width();
    int h = _boundingRect.height();
    _boundingRect.moveTo(QPointF(-w*0.5,-h*0.5));
}

QString HandleText::getText() const
{
    return _text;
}

void HandleText::creatEditor()
{
    if(!_editable)
        return;
    if(!_proxy)
        _proxy = new QGraphicsProxyWidget(this);
    _proxy->setVisible(true);
    QLineEdit *editor = new QLineEdit();
    editor->setText(_text);
    editor->resize(boundingRect().size().toSize()*1.5);
    _proxy->setWidget(editor);

    // 将文本编辑的更改连接到文本项
    connect(editor, &QLineEdit::textChanged, this, [this, editor]() {
        //_text = editor->text();
        setText(editor->text());
    });

    // 完成编辑后，删除QTextEdit
    connect(editor, &QLineEdit::editingFinished, this, [this, editor]() {
        //_text = editor->text();
        setText(editor->text());
        emit editFinish(editor->text());
        _proxy->setVisible(false);
    });
}

void HandleText::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
{
    painter->setPen(Qt::blue);
    painter->setBrush(Qt::blue);
    painter->setRenderHint(QPainter::TextAntialiasing, true);
    int w = _boundingRect.width();
    int h = _boundingRect.height();
    if(_type == 0)
        painter->drawText(QPointF(-w*0.5,h*0.5),_text);
    else{
        QString displayText = _sTagName + ":" + _text;
        painter->drawText(boundingRect(), Qt::AlignCenter, displayText);
    }

}

QRectF HandleText::boundingRect() const
{
    return _boundingRect;
}