[QT]QT教程之实例分析[一]文件 颜色和字体对话框

#ifndef STANDARDIALOG_H
#define STANDARDIALOG_H
#include <QObject>
#include <QDialog>
class QGridLayout;
class QPushButton;
class QLineEdit;
class QFrame;
class standardialog:public QDialog{
Q_OBJECT
public:
//构造函数
standardialog(QWidget *parent=0);
//私有成员
private:
QGridLayout *gridLayout;
QPushButton *fontButton;
QPushButton *colorButton;
QPushButton *fileButton;
QLineEdit *fileLineEdit;
QLineEdit *fontLineEdit;
QFrame *colorFrame;
private slots:
void slotOpenFileDlg();
void slotOpenColorDlg();
void slotOpenFontDlg();
};

#endif // STANDARDIALOG_H

#include <QDialog>
#include <QApplication>
#include <QGridLayout>
#include <QPushButton>
#include <QLineEdit>
#include <QFileDialog>
#include <QFontDialog>
#include <QColorDialog>
#include "standardialog.h"

standardialog::standardialog(QWidget *parent):QDialog(parent){

//设置窗口标题
setWindowTitle("StanDarDialog");
//实例化布局管理器
gridLayout=new QGridLayout(this);
//设置按钮和输入框
fontButton=new QPushButton("font Button");
fileButton =new QPushButton("file Button");
colorButton=new QPushButton("color Button");
fileLineEdit=new QLineEdit(this);
fontLineEdit=new QLineEdit(this);
fontLineEdit->setText("font line edit");
//实例一个框架 FRAME
colorFrame =new QFrame;
colorFrame->setFrameShape(QFrame::Box);
colorFrame->setAutoFillBackground(true);

gridLayout->addWidget(fileButton,0,0);
gridLayout->addWidget(fileLineEdit,0,1);

gridLayout->addWidget(colorButton,1,0);
gridLayout->addWidget(colorFrame,1,1);

gridLayout->addWidget(fontButton,2,0);
gridLayout->addWidget(fontLineEdit,2,1);

//设置间距
gridLayout->setMargin(5);
gridLayout->setSpacing(10);
//关联信号和槽
connect(fontButton,SIGNAL(clicked()),this,SLOT(slotOpenFontDlg()));
connect(fileButton,SIGNAL(clicked()),this,SLOT(slotOpenFileDlg()));
connect(colorButton,SIGNAL(clicked()),this,SLOT(slotOpenColorDlg()));
//设置布局管理器
setLayout(gridLayout);
}
//颜色 对话框
void standardialog::slotOpenColorDlg(){
QColor color=QColorDialog::getColor();
if(color.isValid()){
colorFrame->setPalette(QPalette(color));
}
}
//文件对话框
void standardialog::slotOpenFileDlg(){
QString filename=QFileDialog::getOpenFileName(this,"open this dialog","/");
fileLineEdit->setText(filename.toAscii());
}
//字体对话框
void standardialog::slotOpenFontDlg(){
bool ok;
QFont font=QFontDialog::getFont(&ok);
if(ok){
fontLineEdit->setFont(font);
}
}

int main(int argc,char ** argv){
QApplication app(argc,argv);
standardialog dialog;
dialog.show();
return app.exec();
}