跟青翼一起学Qt4编程系列 之 2-1标准对话框

先把代码放出,明天再慢慢解释吧,现在已经很晚了,明天还上班,一个小Bug折腾了我一晚上,郁闷
后来还是成功了,先截个图:
这个工程主要有三个文件组成:
Main.cpp
StandDialog.h
StandDialog.cpp

 1 StandDialog.h
 2 
 3 #ifndef STANDDIALOGS_H
 4 #define STANDDIALOGS_H
 5 #include <QApplication>
 6 #include <QWidget>
 7 #include <QPushButton>
 8 #include <QLineEdit>
 9 #include <QGridLayout>
 #include <QFileDialog>
 #include <QColor>
 #include <QColorDialog>
 #include <QFont>
 #include <QFontDialog>
 #include <QTextCodec>
 
 class StandDialogs:public QDialog
 {
     Q_OBJECT
    public:
     StandDialogs(QWidget *parent=0,Qt::WindowFlags f=0);
     ~StandDialogs();
     public:
     QGridLayout *layout;
     QPushButton *filePushButton;
     QPushButton *colorPushButton;
     QPushButton *fontPushButton;
     QLineEdit   *fileLineEdit;
     QLineEdit   *fontLineEdit;
     QFrame      *colorFrame;
     private slots:
     void slotOpenFileDlg();
     void slotOpenColorDlg();
     void slotOpenFontDlg();
 };
 
 #endif // STANDDIALOGS_H

#include "StandDialogs.h"

StandDialogs::StandDialogs(QWidget *parent,Qt::WindowFlags f)
        :QDialog(parent,f)
{
    QTextCodec *codec=QTextCodec::codecForName("utf-8");
    //设置窗体标题
    parent->setWindowTitle(codec->toUnicode("标准对话框"));

    layout=new QGridLayout(parent);

    filePushButton=new QPushButton;
    filePushButton->setText(codec->toUnicode("文件选择"));

    colorPushButton=new QPushButton;
    colorPushButton->setText(codec->toUnicode("颜色选择"));

    fontPushButton=new QPushButton;
    fontPushButton->setText(codec->toUnicode("字体选择"));

    //当用户选择不同的颜色时,ColorFrame会根据用户选择的颜色更新其背景
    colorFrame=new QFrame;
    colorFrame->setFrameShape(QFrame::Box);
    colorFrame->setAutoFillBackground(true);
    //当用户选择不同的字体时,fontLineEdit会根据用户选择的字体不同更新其内容
    fileLineEdit=new QLineEdit;
    fontLineEdit=new QLineEdit;
    fontLineEdit->setText(codec->toUnicode("青 翼"));

    //将控件添加到QGridLayout上
    layout->addWidget(filePushButton,0,0);
    layout->addWidget(fileLineEdit,0,1);
    layout->addWidget(colorPushButton,1,0);
    layout->addWidget(colorFrame,1,1);
    layout->addWidget(fontPushButton,2,0);
    layout->addWidget(fontLineEdit,2,1);
    layout->setMargin(15);
    layout->setSpacing(10);

    connect(filePushButton,SIGNAL(clicked()),this,SLOT(slotOpenFileDlg()));
    connect(colorPushButton,SIGNAL(clicked()),this,SLOT(slotOpenColorDlg()));
    connect(fontPushButton,SIGNAL(clicked()),this,SLOT(slotOpenFontDlg()));


}
StandDialogs::~StandDialogs()
{

}
void StandDialogs::slotOpenFileDlg()
{
    QString s=QFileDialog::getOpenFileName(
            this,
            "Open File Dialog",
            "/",
            "C++ files(*.cpp);; C files(*.c);;Head files(*.h)");
    fileLineEdit->setText(s.toAscii());
}
void StandDialogs::slotOpenColorDlg()
{
    QColor color=QColorDialog::getColor(Qt::green);
    if(color.isValid())
    {
        colorFrame->setPalette(QPalette(color));
    }
}
void StandDialogs::slotOpenFontDlg()
{
    bool ok;
    QFont font=QFontDialog::getFont(&ok);
    if(ok)
    {
       fontLineEdit->setFont(font);
    }
}

#include <QApplication>
#include "StandDialogs.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QWidget widget;
    widget.resize(400,300);
    widget.show();
    StandDialogs stdDialog(&widget,0);
    return app.exec();
}