各種彈出對話框的使用

//頭文件
#ifndef DIALOG_H
#define DIALOG_H

#include <QDialog>
#include <QPushButton>
#include <QLineEdit>
#include <QFrame>

class Dialog : public QDialog
{
    Q_OBJECT

public:
    Dialog(QWidget *parent = 0);
    ~Dialog();

public slots:
    void openFileDlg();
    void openColorDlg();
    void openFontDlg();
    void openInputDlg();
    void openMessageDlg();
private:
    QPushButton *fileBtn;
    QPushButton *colorBtn;
    QPushButton *fontBtn;
    QPushButton *inputBtn;
    QPushButton *customBtn;

    QLineEdit *showPath;
    QFrame *colorFrame;
    QLineEdit *showFont;
    QPushButton *messageBtn;
    QLineEdit *showCustom;
};

#endif // DIALOG_H

//源文件
#include "dialog.h"
#include <QGridLayout>
#include <QFileDialog>
#include <QColorDialog>
#include <QInputDialog>
#include <QFontDialog>
#include <QMessageBox>

Dialog::Dialog(QWidget *parent)
    : QDialog(parent)
{
    fileBtn = new QPushButton("文件標準對話框實例");
    connect(fileBtn,SIGNAL(clicked(bool)),this,SLOT(openFileDlg()));
    showPath = new QLineEdit;

    colorBtn = new QPushButton("顏色標準對話框實例");
    connect(colorBtn,SIGNAL(clicked(bool)),this,SLOT(openColorDlg()));
    colorFrame = new QFrame;

    colorFrame->setPalette(Qt::white);
    colorFrame->setAutoFillBackground(true);


    fontBtn = new QPushButton("字體標準對話框實例");
    connect(fontBtn,SIGNAL(clicked(bool)),this,SLOT(openFontDlg()));
    showFont = new QLineEdit;

    inputBtn = new QPushButton("標準輸入對話框");
    connect(inputBtn,SIGNAL(clicked(bool)),this,SLOT(openInputDlg()));
    messageBtn = new QPushButton("標準消息對話框");
    connect(messageBtn,SIGNAL(clicked(bool)),this,SLOT(openMessageDlg()));

    customBtn = new QPushButton("用戶自定義消息對話框實例");
    showCustom = new QLineEdit;

    QGridLayout *grid = new QGridLayout(this);
    grid->addWidget(fileBtn,0,0);
    grid->addWidget(showPath,0,1);
    grid->addWidget(colorBtn,1,0);
    grid->addWidget(colorFrame,1,1);
    grid->addWidget(fontBtn,2,0);
    grid->addWidget(showFont,2,1);
    grid->addWidget(inputBtn,3,0);
    grid->addWidget(messageBtn,3,1);
    grid->addWidget(customBtn,4,0);
    grid->addWidget(showCustom,4,1);

}

Dialog::~Dialog()
{

}

//打開文件對話框
void Dialog::openFileDlg()
{
   QString str = QFileDialog::getOpenFileName(this,tr("打開文件"),"E:/","TXT File(*.txt);; All File(*.*)");
   showPath->setText(str);
}
//打開顏色對話框
void Dialog::openColorDlg()
{
    QColor color = QColorDialog::getColor(Qt::white,this,"colorDialog");
    colorFrame->setPalette(color);
}

//打開字體對話框
void Dialog::openFontDlg()
{
    bool ok;
    ok = true;
    QFont font = QFontDialog::getFont(&ok,this);
    showFont->setText(font.toString());
}
//打開輸入對話框
void Dialog::openInputDlg()
{
    QInputDialog::getText(this,"InputDialog","label");
}
//消息對話框
void Dialog::openMessageDlg()
{
    QMessageBox::information(this,"MessageDlg","歡迎光臨",QMessageBox::Ok,QMessageBox::Cancel);
}