QT如何生产pdf文件，网上有许多文章介绍，我也是看了网上的文章，看他们的代码，自己琢磨琢磨，才有了本编博客；
其他什么就不详细说了，本篇博客介绍的QPdfWriter和QPainter绘制PDF文件；对pdf这里是绘制出来的，没有什么规范的格式，都是通过xy坐标绘制出来的。
QPdfWriter类设置pdf的基础设置；QPainter类绘制文本，图片矩形等；
以下代码参考博客：Qt中使用QPdfWriter类结合QPainter类绘制并输出PDF文件-CSDN博客
自己稍微做了调整了修改！
反正得自己会QPainter绘制，否则你无法绘制pdf文件出来！！！
头文件：
#include <QPdfWriter>
#include <QDesktopServices>
#include <QtPrintSupport/QPrinter>
#include <QtPrintSupport/QtPrintSupport>一、步骤
绘制pdf有以下步骤：
1.选择需要导出的pdf文件路径；
2.创建pdf文件；
3.创建生成pdf类，作为绘图设备；
4.绘制PDF；
5.查看绘制好的pdf。
void Widget::exportPdf()
{
//一、选择保存pdf文件路径
QString sPath = QFileDialog::getSaveFileName(this, tr("另存为"), "/", tr("Text Files (*.pdf)"));
if(sPath.isEmpty())
{
return;
}
qDebug() << sPath;
//二、创建pdf文件
QFile pdfFile(sPath);
pdfFile.open(QIODevice::WriteOnly);
//三、创建生成pdf类，作为绘图设备
QPdfWriter *pPdfWriter = new QPdfWriter(&pdfFile);
pPdfWriter->setResolution(300); // 将打印设备的分辨率设置为屏幕分辨率
pPdfWriter->setPageSize(QPagedPaintDevice::A4); // 设置纸张为A4纸
pPdfWriter->setPageMargins(QMarginsF(30, 30, 30, 30)); // 设置页边距 顺序是:左上右下
//四、开始绘制PDF
//paintPdf(pPdfWriter);
delete pPdfWriter;
pdfFile.close();
//通过其它PDF阅读器来打开刚刚绘制的PDF
QDesktopServices::openUrl(QUrl::fromLocalFile(sPath));
}二、效果展示
三、代码实现
#include "widget.h"
#include "ui_widget.h"
#include <QFileDialog>
#include <QStandardPaths>
#include <QPdfWriter>
#include <QDebug>
#include <QDesktopServices>
#include <QMessageBox>
#include <QtPrintSupport/QPrinter>
#include <QtPrintSupport/QtPrintSupport>
#include <pdfgenerator.h>
Widget::Widget(QWidget *parent) :
QWidget(parent),
ui(new Ui::Widget)
{
ui->setupUi(this);
createPDF();
}
Widget::~Widget()
{
delete ui;
}
void Widget::createPDF()
{
int y = 0;
QString path = "/home/UOS/Desktop/3.pdf";
PdfGenerator *pdfGenerator = new PdfGenerator;
bool flag = pdfGenerator->setFileName(path);
if (!flag) {
return ;
}
int nPdfWidth = pdfGenerator->getPdfWidth();
pdfGenerator->beginPage();
QPixmap p;
p.load(":/007.jpg");
int pHeight = pdfGenerator->drawImage(QRectF(0, y, 150, 150), p);
y += pHeight + 50;
// 绘制表格
y += 100;
QFont f = QFont("宋体", 18, 36);
QColor blackColor = QColor(0,0,0);
pdfGenerator->drawRect(QRectF(0, y, nPdfWidth, 200), blackColor, 2, QColor(100, 0, 200, 50));
pdfGenerator->drawText(QRectF(0, y, nPdfWidth, 200), "这是标题文本！", QFont("宋体", 32, 64));
// 绘制科目
y += 200;
int nClassWidthFlag = nPdfWidth / (8);
int nClassWidth = nClassWidthFlag;
QList<QString> classList;
classList << "语文" << "数学" << "英语" << "历史" << "政治" << "地理" << "音乐" << "体育";
int classx = 0;
for (int i = 0; i < classList.count(); i++) {
pdfGenerator->drawRect(QRectF(classx, y, nClassWidth, 100), blackColor, 2);
pdfGenerator->drawText(QRectF(classx, y, nClassWidth, 100), classList.at(i), QFont("宋体", 12, 20), QColor(200, 100, 100), Qt::AlignCenter);
classx += nClassWidth;
if (7 == i + 1) {
int n = nPdfWidth - (classx + nClassWidth);
nClassWidth += n;
}
}
// 绘制个人信息
y += 100;
int nPersonDescriptionWidth = nClassWidthFlag * 2;
QList<QList<QString>> descriptionList;
QList<QString> list;
list << "小米" << "男" << "15";
descriptionList << list;
list.clear();
list << "小明" << "男" << "20";
descriptionList << list;
list.clear();
list << "小红" << "女" << "21";
descriptionList << list;
list.clear();
list << "姓名" << "性别" << "年龄";
int nPersonDescriptionHeight = 120 + descriptionList.count() * 100;
pdfGenerator->drawRect(QRect(0, y, nPersonDescriptionWidth, nPersonDescriptionHeight));
pdfGenerator->drawText(QRect(0, y, nPersonDescriptionWidth, nPersonDescriptionHeight), "个人信息",
QFont("宋体", 20, 40), QColor(100, 100, 255));
int nMessageX = nPersonDescriptionWidth;
int nMessageWidth = nPersonDescriptionWidth;
for (int i = 0; i < list.count(); i++) {
pdfGenerator->drawRect(QRect(nMessageX, y, nMessageWidth, 120));
pdfGenerator->drawText(QRect(nMessageX, y, nMessageWidth, 120), list.at(i), QFont("宋体", 18, 30), QColor(200, 50, 50));
nMessageX += nPersonDescriptionWidth;
if (list.count()-1 == i + 1) {
int n = nPdfWidth - (nMessageX + nPersonDescriptionWidth);
nMessageWidth += n;
}
}
y += 120;
int nPersonX = nPersonDescriptionWidth;
int nPersonWidth = nPersonDescriptionWidth;
for (int i = 0; i < descriptionList.count(); ++i) {
QList<QString> list = descriptionList.at(i);
for (int j = 0; j < list.count(); ++j) {
pdfGenerator->drawRect(QRect(nPersonX, y, nPersonWidth, 100));
pdfGenerator->drawText(QRect(nPersonX, y, nPersonWidth, 100), list.at(j), pdfGenerator->getBaseFont());
nPersonX += nPersonDescriptionWidth;
if (list.count()-1 == j + 1) {
int n = nPdfWidth - (nPersonX + nPersonDescriptionWidth);
nPersonWidth += n;
}
}
y += 100;
nPersonX = nPersonDescriptionWidth;
nPersonWidth = nPersonDescriptionWidth;
}
// 绘制详细信息
descriptionList.clear();
list.clear();
list << "小明" << "swim" << "擅长蛙泳" << "170cm";
descriptionList << list;
list.clear();
list << "小红" << "dance" << "街舞鼻祖" << "160cm";
descriptionList << list;
list.clear();
list << "小黄" << "run" << "短跑小王子" << "166cm";
descriptionList << list;
list.clear();
list << "小绿" << "jump" << "跳高运动员" << "196cm";
descriptionList << list;
list.clear();
list << "姓名" << "爱好" << "特点" << "身高";
int nDetailedInformationWidth = nClassWidthFlag * 2;
int nDetailedInformationHeight = 120 + descriptionList.count() * 100;
pdfGenerator->drawRect(QRect(0, y, nDetailedInformationWidth, nDetailedInformationHeight));
pdfGenerator->drawText(QRect(0, y, nDetailedInformationWidth, nDetailedInformationHeight), "详细信息",
QFont("宋体", 20, 40), QColor(100, 100, 255));
int nInformationTotalWidth = nPdfWidth - nDetailedInformationWidth;
int nInformationOneWidth = nInformationTotalWidth / descriptionList.count();
int nDetailedX = nDetailedInformationWidth;
int nDetailedWidth = nInformationOneWidth;
for (int i = 0; i < list.count(); i++) {
pdfGenerator->drawRect(QRect(nDetailedX, y, nDetailedWidth, 120));
pdfGenerator->drawText(QRect(nDetailedX, y, nDetailedWidth, 120), list.at(i), QFont("宋体", 20, 30));
nDetailedX += nDetailedWidth;
if (list.count()-1 == i + 1) {
int n = nPdfWidth - (nDetailedX + nDetailedWidth);
nDetailedWidth += n;
}
}
y += 120;
int nInformationX = nDetailedInformationWidth;
int nInformationWidth = nInformationOneWidth;
for (int i = 0; i < descriptionList.count(); ++i) {
QList<QString> list = descriptionList.at(i);
for (int j = 0; j < list.count(); ++j) {
pdfGenerator->drawRect(QRect(nInformationX, y, nInformationWidth, 100));
pdfGenerator->drawText(QRect(nInformationX, y, nInformationWidth, 100), list.at(j),
pdfGenerator->getBaseFont(), QColor(200,0,0));
nInformationX += nInformationWidth;
if (list.count()-1 == j + 1) {
int n = nPdfWidth - (nInformationX + nInformationWidth);
nInformationWidth += n;
}
}
y += 100;
nInformationX = nDetailedInformationWidth;
nInformationWidth = nInformationOneWidth;
}
y += 50;
pdfGenerator->drawPolygon(QRect(600, y, 800, 600));
pdfGenerator->drawRect(QRect(600, y, 800, 600));
// 换页
// if(y + 100 >= pdfGenerator->getPdfHeight()) {
// pdfGenerator->newPage();
// y = 10;
// }
pdfGenerator->newPage();
y = 0;
/************************************************************************************************************/
// 外部大矩形框
pdfGenerator->drawRect(QRect(0, y, nPdfWidth, pdfGenerator->getPdfHeight()), QColor(0,0,0), 8);
// 左上角m级
f = pdfGenerator->getBaseFont();
f.setBold(true);
f.setPointSize(13);
pdfGenerator->drawText(QRectF(10, y, 360, 100), "m级：非m", f, QColor(0,0,0), Qt::AlignLeft);
// 页码
int pageX = 900;
f = pdfGenerator->getBaseFont("宋体", 12, 0);
pdfGenerator->drawText(QRectF(pageX, y, 500, 100), "第 1 页 Page", f, QColor(0,0,0), Qt::AlignLeft);
y += 80;
pdfGenerator->drawText(QRectF(pageX, y, 1444, 100), "共 2 页 This report includes page", f, QColor(0,0,0), Qt::AlignLeft);
y += 100;
// 标题1
f = pdfGenerator->getBaseFont("宋体", 20, 8);
pdfGenerator->drawText(QRectF(0, y, nPdfWidth, 120), "嘻嘻嘻这是一份关于检测相关的世界的详细报告哈哈", f, QColor(0,0,0), Qt::AlignCenter);
y += 120;
// 标题1英语
f = pdfGenerator->getBaseFont("Times New Roman", 11, 8);
QString english = "abc abc He he he, this is a detailed report about the world related to testing. Ha ha. abc abc";
pdfGenerator->drawText(QRectF(0, y, nPdfWidth, 120), english, f, QColor(0,0,0), Qt::AlignCenter);
y += 150;
// 标题2
f = pdfGenerator->getBaseFont("宋体", 30, 8);
pdfGenerator->drawText(QRectF(0, y, nPdfWidth, 130), "一二三四五六报告", f, QColor(0,0,0), Qt::AlignCenter);
y += 160;
// 标题2英语
f = pdfGenerator->getBaseFont("Times New Roman", 20, 12);
pdfGenerator->drawText(QRectF(0, y, nPdfWidth, 130), "Tihs is a Report", f, QColor(0,0,0), Qt::AlignCenter);
y += 160;
// 报告编号
f = pdfGenerator->getBaseFont("宋体", 10, 0);
pdfGenerator->drawText(QRectF(0, y, nPdfWidth, 50), "报告编号：（ 2025 ）报告的 第 15 号", f, QColor(0,0,0), Qt::AlignCenter);
y += 80;
// Report No.
f = pdfGenerator->getBaseFont("Times New Roman", 10, 0);
pdfGenerator->drawText(QRectF(0, y, nPdfWidth, 50), "Report No.", f, QColor(0,0,0), Qt::AlignCenter);
int nameX = 200; // 距离左边的距离
int lineX = 500; // 横线距离左边的距离
int lineWidth = 1322; // 横线宽度
y += 100;
for (int i = 0; i < 6; i++) {
int tmpY = y + 30;
// 你的名称
f = pdfGenerator->getBaseFont();
pdfGenerator->drawText(QRectF(nameX, y, 250, 60), "你的名称：", f, QColor(0,0,0), Qt::AlignLeft);
y += 80;
// 英文
f = pdfGenerator->getBaseFont("Times New Roman", 10, 0);
pdfGenerator->drawText(QRectF(nameX, y, 250, 60), "Your name", f, QColor(0,0,0), Qt::AlignLeft);
y += 70;
// 画横线
f = pdfGenerator->getBaseFont();
pdfGenerator->drawLine(QPointF(lineX, y), QPointF(lineX + lineWidth, y));
// 画文本
pdfGenerator->drawText(QRectF(lineX, tmpY, lineWidth, 80), "这是名字呀", f, QColor(0,0,0), Qt::AlignCenter);
y += 30;
// 自动换页处理
// if(y + 200 >= pdfGenerator->getPdfHeight()) {
// pdfGenerator->newPage();
// y = 10;
// }
}
y += 50;
// 签发人
f = pdfGenerator->getBaseFont();
pdfGenerator->drawText(QRectF(nameX, y, 400, 60), "签发人：（签字）", f, QColor(0,0,0), Qt::AlignLeft);
int dataX = 1111;
// 发证日期
f = pdfGenerator->getBaseFont();
pdfGenerator->drawText(QRectF(dataX, y, 400, 60), "发证日期：", f, QColor(0,0,0), Qt::AlignLeft);
y += 90;
// 签发人 英文
f = pdfGenerator->getBaseFont("Times New Roman", 10);
pdfGenerator->drawText(QRectF(nameX, y, 400, 60), "Signature of leader", f, QColor(0,0,0), Qt::AlignLeft);
// 发证日期 英文
f = pdfGenerator->getBaseFont("Times New Roman", 10);
pdfGenerator->drawText(QRectF(dataX, y, 400, 60), "lssued date", f, QColor(0,0,0), Qt::AlignLeft);
y += 200;
// 发证单位
f = pdfGenerator->getBaseFont();
pdfGenerator->drawText(QRectF(dataX, y, 600, 60), "发证单位：（盖章位置）", f, QColor(0,0,0), Qt::AlignLeft);
y += 90;
// 发证单位 英文
f = pdfGenerator->getBaseFont("Times New Roman", 10);
pdfGenerator->drawText(QRectF(dataX, y, 400, 60), "lssued by(stamp)", f, QColor(0,0,0), Qt::AlignLeft);
y += 200;
// 地址
f = pdfGenerator->getBaseFont("宋体", 10);
f.setBold(true);
pdfGenerator->drawText(QRectF(nameX, y, 600, 66), "地址（Add）:", f, QColor(0,0,0), Qt::AlignLeft);
f = pdfGenerator->getBaseFont("宋体", 10);
pdfGenerator->drawText(QRectF(nameX + 330, y, 800, 66), "广东省广州市天河区xx街道xx村xx号", f, QColor(0,0,0), Qt::AlignLeft);
// 邮编
f = pdfGenerator->getBaseFont("宋体", 10);
f.setBold(true);
pdfGenerator->drawText(QRectF(nameX + 1100, y, 600, 66), "邮编（Post Code）:", f, QColor(0,0,0), Qt::AlignLeft);
f = pdfGenerator->getBaseFont("宋体", 10);
pdfGenerator->drawText(QRectF(nameX + 1550, y, 300, 66), "123456", f, QColor(0,0,0), Qt::AlignLeft);
y += 100;
// 电话
f = pdfGenerator->getBaseFont("宋体", 10);
f.setBold(true);
pdfGenerator->drawText(QRectF(nameX, y, 600, 66), "电话（Tel）:", f, QColor(0,0,0), Qt::AlignLeft);
f = pdfGenerator->getBaseFont("宋体", 10);
pdfGenerator->drawText(QRectF(nameX + 330, y, 800, 66), "002-123456789", f, QColor(0,0,0), Qt::AlignLeft);
// 传真
f = pdfGenerator->getBaseFont("宋体", 10);
f.setBold(true);
pdfGenerator->drawText(QRectF(nameX + 800, y, 600, 66), "传真(Fax):", f, QColor(0,0,0), Qt::AlignLeft);
f = pdfGenerator->getBaseFont("宋体", 10);
pdfGenerator->drawText(QRectF(nameX + 1050, y, 300, 66), "002-123456789", f, QColor(0,0,0), Qt::AlignLeft);
y += 100;
// 电子邮箱
f = pdfGenerator->getBaseFont("宋体", 10);
f.setBold(true);
pdfGenerator->drawText(QRectF(nameX, y, 600, 66), "电子信箱(E-mail):", f, QColor(0,0,0), Qt::AlignLeft);
f = pdfGenerator->getBaseFont("宋体", 10);
pdfGenerator->drawText(QRectF(nameX + 400, y, 800, 66), "youxiang666@qq.com", f, QColor(0,0,0), Qt::AlignLeft);
pdfGenerator->endPage();
// 通过其它PDF阅读器来打开刚刚绘制的PDF
QDesktopServices::openUrl(QUrl::fromLocalFile(path));
}
四、源码分享
pdfgenerator.h
#ifndef PDF_GENERATOR_H
#define PDF_GENERATOR_H
#include <QObject>
#include <QPdfWriter>
#include <QPainter>
#include <QFont>
#include <QImage>
#include <QPageSize>
#include <QFile>
class PdfGenerator : public QObject {
Q_OBJECT
public:
explicit PdfGenerator(const QString &fileName, QPagedPaintDevice::PageSize size = QPagedPaintDevice::PageSize::A4, QObject *parent = nullptr);
explicit PdfGenerator(QObject *parent = nullptr);
~PdfGenerator();
qreal getPdfWidth();
qreal getPdfHeight();
/**
* @brief getBaseFont 获得基本的字体
* @param family
* @param pointSize
* @param weight
* @return
*/
QFont getBaseFont(const QString &family = "宋体", int pointSize = 12, int weight = -1);
/**
* @brief setMargins 设置pdf边距，分别是 左-上-右-下
* @param left
* @param top
* @param right
* @param bottom
*/
void setMargins(qreal left, qreal top, qreal right, qreal bottom);
/**
* @brief setResolution 设置分辨率，一般为300
* @param dpi
*/
void setResolution(int dpi = 300);
/**
* @brief newPage 新建下一页
*/
void newPage();
/**
* @brief beginPage 开始绘画
* @return 成功返回true；失败返回false
*/
bool beginPage();
/**
* @brief endPage 结束会话
* @return 成功返回true；失败返回false
*/
bool endPage();
/**
* @brief setFileName 设置pdf文件名，内部会open
* @param fileName
* @param size
* @return
*/
bool setFileName(const QString &fileName, QPagedPaintDevice::PageSize size = QPagedPaintDevice::PageSize::A4);
/**
* @brief drawLine 绘制线段
* @param start 起始坐标
* @param end 结束坐标
* @param color 线段颜色
* @param width 线段宽度
*/
void drawLine(const QPointF &start, const QPointF &end, const QColor &color = QColor(0,0,0), qreal width = 2);
/**
* @brief drawText 绘制文字
* @param rect 绘制的位置（矩形）
* @param text 绘制的文本
* @param font 绘制字体
* @param color 字体颜色
* @param align 对齐
*/
void drawText(const QRectF &rect, const QString &text, const QFont &font, const QColor &color = QColor(0,0,0), Qt::Alignment align = Qt::AlignCenter);
/**
* @brief drawImage 绘制图片
* @param rect 绘制的位置（矩形）
* @param imagePath 图片路径
*/
int drawImage(const QRectF &rect, const QString &imagePath);
int drawImage(const QRectF &rect, const QPixmap &pixmap);
int drawImage(const QRectF &rect, const QImage &image);
/**
* @brief drawRect 绘制矩形
* @param rect 绘制的位置（矩形）
* @param borderColor 边框的颜色
* @param borderWidth 边框宽度
* @param fillColor 填充的颜色，默认透明，不填充
*/
void drawRect(const QRectF &rect, const QColor &borderColor = QColor(0,0,0), qreal borderWidth = 2, const QColor &fillColor = Qt::transparent);
/**
* @brief drawEllipse 绘制椭圆
* @param rect 绘制的位置（矩形）
* @param borderColor 边框的颜色
* @param borderWidth 边框宽度
* @param fillColor 填充的颜色，默认透明，不填充
*/
void drawEllipse(const QRectF &rect, const QColor &borderColor = QColor(0,0,0), qreal borderWidth = 2, const QColor &fillColor = Qt::transparent);
/**
* @brief drawPolygon 画三角形,三角形在矩形区域内
* @param rect 绘制的位置（矩形）
* @param borderColor 边框的颜色
* @param borderWidth 边框宽度
* @param fillColor 填充的颜色，默认透明，不填充
*/
void drawPolygon(const QRectF &rect, const QColor &borderColor = QColor(0,0,0), qreal borderWidth = 2, const QColor &fillColor = Qt::transparent);
// 想设计其他绘制接口继续往下加
private:
QPdfWriter *m_writer = nullptr;
QPainter *m_painter = nullptr;
/// pdf可绘制区域
QRect m_pageRect;
/// pdf文件
QFile m_pdfFile;
};
#endif // PDF_GENERATOR_Hpdfgenerator.cpp
#include "pdfgenerator.h"
#include <QtDebug>
PdfGenerator::PdfGenerator(const QString &fileName, QPagedPaintDevice::PageSize size, QObject *parent) : QObject (parent)
{
m_pdfFile.setFileName(fileName);
m_writer = new QPdfWriter(&m_pdfFile);
m_writer->setPageSize(size); // 设置纸张
m_writer->setResolution(300); // 设置分辨率
m_writer->setPageMargins(QMarginsF(20, 20, 20, 20), QPageLayout::Millimeter); // 设置页边距
m_pageRect = m_writer->pageLayout().paintRectPixels(m_writer->resolution());
// 计算可绘制区域
m_pageRect = QRect(0, 0, m_writer->width(), m_writer->height());
if(!m_pdfFile.open(QIODevice::WriteOnly))
return ;
}
PdfGenerator::PdfGenerator(QObject *parent) : QObject (parent)
{
}
PdfGenerator::~PdfGenerator()
{
if (m_painter) {
if (m_painter->isActive())
{
m_painter->end();
}
delete m_painter;
}
if (m_writer) {
m_writer->deleteLater();
}
}
qreal PdfGenerator::getPdfWidth()
{
return m_pageRect.width();
}
qreal PdfGenerator::getPdfHeight()
{
return m_pageRect.height();
}
QFont PdfGenerator::getBaseFont(const QString &family, int pointSize, int weight)
{
QFont f(family, pointSize, weight);
return f;
}
void PdfGenerator::setMargins(qreal left, qreal top, qreal right, qreal bottom)
{
m_writer->setPageMargins(QMarginsF(left, top, right, bottom), QPageLayout::Millimeter);
m_pageRect = m_writer->pageLayout().paintRectPixels(m_writer->resolution()); // 更新绘制区域
}
void PdfGenerator::setResolution(int dpi)
{
m_writer->setResolution(dpi);
}
void PdfGenerator::newPage()
{
// 创建新页
m_writer->newPage();
}
bool PdfGenerator::beginPage()
{
bool bRet = false;
if(nullptr == m_painter)
{
m_painter = new QPainter(m_writer);
}
//启用抗锯齿
m_painter->setRenderHint(QPainter::Antialiasing);
if (nullptr != m_painter)
{
m_painter->begin(m_writer);
//m_painter->reset(new QPainter(m_writer.data()));
bRet = m_painter->isActive();
}
qDebug() << "beginPage bRet is " << bRet;
return bRet;
}
bool PdfGenerator::endPage() {
if (m_painter && m_painter->isActive())
{
m_painter->end();
m_writer->deleteLater();
m_pdfFile.close();
return true;
}
m_pdfFile.close();
return false;
}
bool PdfGenerator::setFileName(const QString &fileName, QPagedPaintDevice::PageSize size)
{
m_pdfFile.setFileName(fileName);
// 打开创建并以写的方式打开文件
if(!m_pdfFile.open(QIODevice::WriteOnly | QIODevice::Truncate)) {
return false;
}
m_writer = new QPdfWriter(&m_pdfFile);
m_writer->setPageSize(size); // 设置纸张
m_writer->setResolution(300); // 设置分辨率
m_writer->setPageMargins(QMarginsF(20, 20, 20, 20), QPageLayout::Millimeter); // 设置页边距
m_pageRect = m_writer->pageLayout().paintRectPixels(m_writer->resolution());
// 计算可绘制区域
m_pageRect = QRect(0, 0, m_writer->width(), m_writer->height());
return true;
}
// 绘制线段
void PdfGenerator::drawLine(const QPointF &start, const QPointF &end, const QColor &color, qreal width)
{
if (!m_painter->isActive())
return;
m_painter->save();
m_painter->setPen(QPen(color, width));
m_painter->drawLine(start, end);
m_painter->restore();
}
// 绘制文本（支持对齐）
void PdfGenerator::drawText(const QRectF &rect, const QString &text, const QFont &font, const QColor &color, Qt::Alignment align)
{
if (!m_painter->isActive())
return;
m_painter->save();
m_painter->setFont(font);
m_painter->setPen(color);
m_painter->drawText(rect, static_cast<int>(align), text);
m_painter->restore();
}
// 绘制图片（根据大小比例,来放大缩小图片）
int PdfGenerator::drawImage(const QRectF &rect, const QString &imagePath)
{
if (!m_painter->isActive())
return -10;
QPixmap pixmap;
if (!pixmap.load(imagePath)) {
return -1;
}
int nPdfWidth = m_pageRect.width();
int imageBorder = rect.width();
float x = (float)(nPdfWidth - imageBorder * 2) / (float)pixmap.width();
pixmap = pixmap.scaled(nPdfWidth - imageBorder * 2, x * pixmap.height(), Qt::IgnoreAspectRatio); //根据大小比例,来放大缩小图片
m_painter->drawPixmap(imageBorder, static_cast<int>(rect.y()), pixmap);
return pixmap.height();
}
int PdfGenerator::drawImage(const QRectF &rect, const QPixmap &pixmap)
{
if (!m_painter->isActive())
return -1;
if (pixmap.isNull())
return -1;
int nPdfWidth = m_pageRect.width();
int imageBorder = rect.width();
float x = (float)(nPdfWidth - imageBorder * 2) / (float)pixmap.width();
QPixmap pixmapTmp = pixmap.scaled(nPdfWidth - imageBorder * 2, x * pixmap.height(), Qt::IgnoreAspectRatio); //根据大小比例,来放大缩小图片
m_painter->drawPixmap(imageBorder, static_cast<int>(rect.y()), pixmapTmp);
return pixmapTmp.height();
}
int PdfGenerator::drawImage(const QRectF &rect, const QImage &image)
{
if (!m_painter->isActive())
return -1;
if (image.isNull())
return -1;
int nPdfWidth = m_pageRect.width();
int imageBorder = rect.width();
float x = (float)(nPdfWidth - imageBorder * 2) / (float)image.width();
QImage imageTmp = image.scaled(nPdfWidth - imageBorder * 2, x * image.height(), Qt::IgnoreAspectRatio); //根据大小比例,来放大缩小图片
m_painter->drawImage(rect, image);
return image.height();
}
// 绘制矩形（支持填充）
void PdfGenerator::drawRect(const QRectF &rect, const QColor &borderColor, qreal borderWidth, const QColor &fillColor)
{
if (!m_painter->isActive())
return;
m_painter->save();
m_painter->setBrush(QBrush(fillColor)); // 填充
m_painter->setPen(QPen(borderColor, borderWidth));
m_painter->drawRect(rect);
m_painter->restore();
}
// 绘制椭圆
void PdfGenerator::drawEllipse(const QRectF &rect, const QColor &borderColor, qreal borderWidth, const QColor &fillColor)
{
if (!m_painter->isActive())
return;
m_painter->save();
m_painter->setBrush(QBrush(fillColor));
m_painter->setPen(QPen(borderColor, borderWidth));
m_painter->drawEllipse(rect);
m_painter->restore();
}
void PdfGenerator::drawPolygon(const QRectF &rect, const QColor &borderColor, qreal borderWidth, const QColor &fillColor)
{
if (!m_painter->isActive())
return;
QPen pen(borderColor, borderWidth); // 底边线宽为5
m_painter->setPen(pen);
QBrush brush(fillColor);
m_painter->setBrush(brush);
QPoint points[3] = {
QPoint(rect.x(), rect.y() + rect.height()), // 左下角点
QPoint(rect.x() + rect.width(), rect.y() + rect.height()), // 右下角点
QPoint((rect.width() + rect.x() + rect.x()) / 2, rect.y()) // 上顶点
};
m_painter->drawPolygon(points, 3);
}
