Qt调用打印机

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printer.pro

#-------------------------------------------------## Project created by QtCreator 2012-04-10T16:12:44##-------------------------------------------------QT       += core gui widgets printsupportTARGET = printerTEMPLATE = appSOURCES += main.cpp\        widget.cpp \    myprinter.cppHEADERS  += widget.h \    myprinter.hFORMS    += widget.ui \    myprinter.ui

myprinter.h

#ifndef MYPRINTER_H#define MYPRINTER_H#include <QDialog>namespace Ui {class myPrinter;}class myPrinter : public QDialog{    Q_OBJECT    public:    explicit myPrinter(QWidget *parent = 0);    ~myPrinter();    private:    Ui::myPrinter *ui;};#endif // MYPRINTER_H

myprinter.cpp

#include "myprinter.h"

#include "ui_myprinter.h"

myPrinter::myPrinter(QWidget *parent) :

    QDialog(parent),

    ui(new Ui::myPrinter)

    ui->setupUi(this);

myPrinter::~myPrinter()

    delete ui;

widget.h

#ifndef WIDGET_H#define WIDGET_H#include <QWidget>#include <QPrinter>#include "myprinter.h"namespace Ui {class Widget;}class Widget : public QWidget{    Q_OBJECT    public:    explicit Widget(QWidget *parent = 0);    ~Widget();        void printImage();private slots:    void on_pushButton_clicked();    void plotPic(QPrinter *);private:    Ui::Widget *ui;    myPrinter * myprinter;    QPrinter *printer;//    QPrinter printer;};#endif // WIDGET_H

widget.cpp

#include "widget.h"#include "ui_widget.h"#include <QPrintDialog>#include <QTableWidget>#include <QPainter>#include <QPrintPreviewDialog>#include <QMessageBox>#include <QDialog>#include <QtDebug>#include <QTextDocument>Widget::Widget(QWidget *parent) :    QWidget(parent),    ui(new Ui::Widget){    ui->setupUi(this);    myprinter = new myPrinter(this);}Widget::~Widget(){    delete ui;}void Widget::on_pushButton_clicked(){    QPrinter printer(QPrinter::HighResolution);    QPrintPreviewDialog preview(&printer,0);/* 打印预览 */    /**     * QPrintPreviewDialog类提供了一个打印预览对话框，里面功能比较全，     * paintRequested(QPrinter *printer)是系统提供的，     * 当preview.exec()执行时该信号被触发，     * plotPic(QPrinter *printer)是用户自定义的槽函数，图像的绘制就在这个函数里。     */    connect(&preview, SIGNAL(paintRequested(QPrinter *)),this,SLOT(plotPic(QPrinter *)));    this->close();    preview.exec(); /* 等待预览界面退出 */}void Widget::plotPic(QPrinter *printer){    QDialog *myForm = myprinter;    QPainter painter(printer);    QPixmap image;    image=image.grabWidget(myForm,0,0,400,300);/* 绘制窗口至画布 */    QRect rect = painter.viewport();    QSize size = image.size();    size.scale(rect.size(), Qt::KeepAspectRatio);//此处保证图片显示完整    painter.setViewport(rect.x(), rect.y(),size.width(), size.height());    painter.setWindow(image.rect());    painter.drawPixmap(0,0,image);/* 数据显示至预览界面 */}

main.cpp

#include <Qapplication>#include "widget.h"int main(int argc, char *argv[]){    QApplication a(argc, argv);    Widget w;    w.show();        return a.exec();}

widget.ui只需要一个按钮触发打印就好

myprinter.ui 是需要答应的内容可以随便添加内容

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