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0. 基本对话框

dialog.cpp

#include "dialog.h"
#include "ui_dialog.h"

#include <QFileDialog>
#include <QColorDialog>
#include <QFontDialog>
#include <QInputDialog>


Dialog::Dialog(QWidget *parent)
    : QDialog(parent)
    , ui(new Ui::Dialog)
{
    ui->setupUi(this);
}

Dialog::~Dialog()
{
    delete ui;
}

void Dialog::on_btnClearText_clicked()
{
    ui->plainTextEdit->clear();
}


void Dialog::on_btnOpen_clicked()
{
    QString curPath = QDir::currentPath();
    QString dlgTitle = "选择对话框";
    QString filter = "文本文件(*.txt);;图片文件(*.jpg *.gif);;所有格式(*.*)";
    QString filename = QFileDialog::getOpenFileName(this,dlgTitle, curPath,filter);

    if(filename.isEmpty())  return;
    ui->plainTextEdit->appendPlainText(filename);
}


void Dialog::on_btnOpenMulti_clicked()
{
    QString curPath = QDir::currentPath();
    QString dlgTitle = "头title";
    QString filter = "文本文件(*.txt);;图片文件(*.jpg *.gif);;所有格式(*.*)";
    QStringList filenames = QFileDialog::getOpenFileNames(this, dlgTitle,curPath, filter);

    if(filenames.count()==0) return;
    foreach (QString file, filenames) {
        ui->plainTextEdit->appen