147 lines
4.1 KiB
C++
147 lines
4.1 KiB
C++
#include "widget.h"
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#include <QPainter>
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#include <QDebug>
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// test
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#include <QFile>
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#include <QByteArray>
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#include <QPainter>
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#include <QPixmap>
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#include <QIcon>
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#include <QSvgRenderer>
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#include <QDomElement>
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#include <QDomElement>
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#include <QIcon>
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#include <QSize>
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QIcon ChangeSVGColor(QString path, QString color, QSize size)
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{
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QFile file(path);
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file.open(QIODevice::ReadOnly);
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QByteArray baData = file.readAll();
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QDomDocument doc;
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doc.setContent(baData);
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QDomElement elem = doc.documentElement(); // const 和 值传递
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SetAttrRecur(elem, "path", "fill", color);
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QSvgRenderer svgRenderer(doc.toByteArray());
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// create pixmap target (could be a QImage)
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// QPixmap pix(svgRenderer.defaultSize());
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QPixmap pix(svgRenderer.defaultSize().scaled(size.width(), size.height(), Qt::KeepAspectRatio)); // fix: 修改 svg 颜色后略有模糊
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pix.fill(Qt::transparent);
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// create painter to act over pixmap
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QPainter pixPainter(&pix);
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// use renderer to render over painter which paints on pixmap
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svgRenderer.render(&pixPainter);
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QIcon myicon(pix);
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return myicon;
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}
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void SetAttrRecur(QDomElement &elem, QString strtagname, QString strattr, QString strattrval)
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{
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// if it has the tagname then overwritte desired attribute
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if (elem.tagName().compare(strtagname) == 0)
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{
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elem.setAttribute(strattr, strattrval);
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}
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// loop all children
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for (int i = 0; i < elem.childNodes().count(); i++)
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{
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if (!elem.childNodes().at(i).isElement())
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{
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continue;
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}
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QDomElement t = elem.childNodes().at(i).toElement();
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SetAttrRecur(t, strtagname, strattr, strattrval);
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}
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}
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Widget::Widget(QWidget *parent)
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: QWidget(parent)
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, m_btn()
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{
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setWindowTitle("change .svg color");
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resize(1600, 1000);
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QIcon icon(ChangeSVGColor(":/mosaic.svg", QColor(Qt::green).name(), QSize(m_width, m_width)));
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m_btn = new QToolButton(this);
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m_btn->setCheckable(true);
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m_btn->setToolButtonStyle(Qt::ToolButtonIconOnly);
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m_btn->setAutoRaise(true); // 自动浮动模式
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m_btn->setIcon(icon);
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m_btn->setIconSize(QSize(m_width, m_width));
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// m_btn->resize(200, 200);
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m_btn->move(0, 0);
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// QIcon icon2(":/mosaic.svg");
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m_btn2 = new QToolButton(this);
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m_btn2->setCheckable(true);
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m_btn2->setToolButtonStyle(Qt::ToolButtonIconOnly);
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m_btn2->setAutoRaise(false); // 自动浮动模式
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m_btn2->setIcon(icon);
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m_btn2->setIconSize(QSize(m_width, m_width));
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// m_btn->resize(200, 200);
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m_btn2->move(200, 0);
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m_btn->show();
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m_btn2->show();
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connect(m_btn, &QToolButton::clicked, this, &Widget::onBtnChecked);
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connect(m_btn2, &QToolButton::clicked, this, &Widget::onBtnChecked);
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}
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Widget::~Widget()
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{
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}
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void Widget::paintEvent(QPaintEvent *event)
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{
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QPainter pa(this);
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pa.setBrush(Qt::NoBrush);
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pa.setPen(QPen(Qt::black, 1));
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pa.setPen(Qt::blue);
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QRect rt(200, 200, 200, 200);
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pa.drawRect(rt);
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QPoint pos(500, 200);
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int off = 30;
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pa.drawText(pos + QPoint(0, off * 0), QString("rt.x():%1 rt.y():%2 rt.width():%3 rt.height():%4")
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.arg(rt.x()).arg(rt.y()).arg(rt.width()).arg(rt.height()));
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pa.drawText(pos + QPoint(0, off * 1), QString("rt.left():%1 rt.top():%2 rt.right():%3 rt.bottom():%4")
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.arg(rt.left()).arg(rt.top()).arg(rt.right()).arg(rt.bottom()));
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pa.drawText(pos + QPoint(0, off * 2), QString("rt.topLeft().x():%1 rt.topLeft().y():%2 rt.bottomRight().x():%3 rt.bottomRight().y():%4")
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.arg(rt.topLeft().x()).arg(rt.topLeft().y()).arg(rt.bottomRight().x()).arg(rt.bottomRight().y()));
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update();
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}
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void Widget::onBtnChecked(bool checked)
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{
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QString path(":/mosaic.svg");
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QIcon ico;
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if (checked)
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ico.addFile(path);
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else
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ico = ChangeSVGColor(path, QColor(Qt::green).name(), QSize(m_width, m_width));
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auto bt = qobject_cast<QToolButton*>(sender());
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bt->setIcon(ico);
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}
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