【Qt】2.1 创建对话框

 1 #include <QApplication>
 2 #include <QDialog>
 3 #include <QHBoxLayout>
 4 #include <QLineEdit>
 5 #include <QPushButton>
 6 
 7 int mainc(int argc, char *argv[])
 8 {
 9     QApplication app(argc, argv);
10     
11     // 创建一个对话框对象
12     QDialog * dlg = new QDialog;
13     // 设置对话框标题文字
14     dlg->setWindowTitle("对话框");
15     
16     // 创建一个编辑框和按钮
17     QLineEdit * edit = new QLineEdit;
18     QPushButton * button = new QPushButton("确定");
19     
20     // 创建一个水平布局管理器并将编辑框和按钮添加进去
21     QHBoxLayout * layout = new QHBoxLayout;
22     layout->addWidget(edit);
23     layout->addWidget(button);
24     
25     // 设置对话框的布局管理器
26     dlg->setLayout(layout);
27     
28     // 显示对话框
29     dlg->show();
30     
31     return app.exec();
32 }

 1 #ifndef NEWDIALOG_H
 2 #define NEWDIALOG_H
 3 
 4 #include <QDialog>
 5 
 6 class QLineEdit;
 7 class QPushButton;
 8 class QLabel;
 9 class QCheckBox;
10 
11 class NewDialog : public QDialog
12 {
13     Q_OBJECT
14     
15 public:
16     NewDialog(QWidget * parent = 0);
17     
18 signals:
19     void infoSubmit(const QString & info);
20     
21 public slots:
22     void setOkButtonEnable();
23     void submitInfo();
24     void cancelDlg();
25     
26 private:
27     QLineEdit * edit;
28     QPushButton * okButton;
29     QPushButton * cancelButton;
30     QLabel * label_Name;
31     QLabel * label_Hobby;
32     QCheckBox * checkBox1;
33     QCheckBox * checkBox2;
34     QCheckBox * checkBox3;
35     QCheckBox * checkBox4;
36     
37 };
38 
39 #endif // NEWDIALOG_H

  1 #include "newdialog.h"
  2 
  3 #include <QtGui>
  4 
  5 NewDialog::NewDialog(QWidget * parent) : QDialog(parent)
  6 {
  7     // 设置编码格式
  8     QTextCodec::setCodecForCStrings(QTextCodec::codecForName("UTF-8"));
  9     
 10     // 设置对话框标题
 11     setWindowTitle("个人信息");
 12     
 13     // 新建对象
 14     edit = new QLineEdit;
 15     
 16     okButton = new QPushButton("提交(&o)");
 17     okButton->setEnabled(false);
 18     cancelButton = new QPushButton("放弃(&c)");
 19     
 20     label_Name = new QLabel("你的名字(&i)");
 21     label_Name->setBuddy(edit);
 22     label_Hobby = new QLabel("你的爱好");
 23     
 24     checkBox1 = new QCheckBox("运动");
 25     checkBox2 = new QCheckBox("电影");
 26     checkBox3 = new QCheckBox("看书");
 27     checkBox4 = new QCheckBox("游戏");
 28     
 29     // 设置连接
 30     connect(edit, SIGNAL(textChanged(QString)),
 31             this, SLOT(setOkButtonEnable()));
 32     connect(checkBox1, SIGNAL(clicked(bool)),
 33             this, SLOT(setOkButtonEnable()));
 34     connect(checkBox2, SIGNAL(clicked(bool)),
 35             this, SLOT(setOkButtonEnable()));
 36     connect(checkBox3, SIGNAL(clicked(bool)),
 37             this, SLOT(setOkButtonEnable()));
 38     connect(checkBox4, SIGNAL(clicked(bool)),
 39             this, SLOT(setOkButtonEnable()));
 40     connect(okButton, SIGNAL(clicked(bool)),
 41             this, SLOT(submitInfo()));
 42     connect(cancelButton, SIGNAL(clicked(bool)),
 43             this, SLOT(cancelDlg()));
 44     
 45     
 46     // 设置布局
 47     
 48     // 名字
 49     QHBoxLayout * layoutName = new QHBoxLayout;
 50     layoutName->addWidget(label_Name);
 51     layoutName->addWidget(edit);
 52     
 53     // 爱好
 54     QVBoxLayout * layoutHobby = new QVBoxLayout;
 55     layoutHobby->addWidget(label_Hobby);
 56     
 57     QGridLayout * layoutCheckBox = new QGridLayout;
 58     layoutCheckBox->addWidget(checkBox1, 0, 0);
 59     layoutCheckBox->addWidget(checkBox2, 0, 1);
 60     layoutCheckBox->addWidget(checkBox3, 1, 0);
 61     layoutCheckBox->addWidget(checkBox4, 1, 1);
 62     
 63     layoutHobby->addLayout(layoutCheckBox);
 64     
 65     // 提交与放弃按钮
 66     QHBoxLayout * layoutButton = new QHBoxLayout;
 67     layoutButton->addStretch();
 68     layoutButton->addWidget(okButton);
 69     layoutButton->addWidget(cancelButton);
 70     
 71     // 主布局管理器
 72     QVBoxLayout * mainLayout = new QVBoxLayout;
 73     mainLayout->addLayout(layoutName);
 74     mainLayout->addLayout(layoutHobby);
 75     mainLayout->addLayout(layoutButton);
 76     
 77     setLayout(mainLayout);
 78     
 79 }
 80 
 81 void NewDialog::setOkButtonEnable()
 82 {
 83     if(edit->text() == "")
 84     {
 85         okButton->setEnabled(false);
 86     }
 87     else if(!checkBox1->isChecked() && !checkBox2->isChecked() && 
 88             !checkBox3->isChecked() && !checkBox4->isChecked())
 89     {
 90         okButton->setEnabled(false);
 91     }
 92     else
 93     {
 94         okButton->setEnabled(true);
 95     }
 96 }
 97 
 98 void NewDialog::submitInfo()
 99 {
100     QString Info = "你提交的信息是：\n名字：" + edit->text() +
101             "\n爱好：";
102     if(checkBox1->isChecked()) Info += checkBox1->text() +",";
103     if(checkBox2->isChecked()) Info += checkBox2->text() +",";
104     if(checkBox3->isChecked()) Info += checkBox3->text() +",";
105     if(checkBox4->isChecked()) Info += checkBox4->text() +",";
106     Info[Info.size() - 1] = '.';
107     QMessageBox * msg = 
108             new QMessageBox(QMessageBox::Information,
109                             "提交成功", Info);
110     msg->show();
111     emit infoSubmit(Info);
112 }
113 
114 void NewDialog::cancelDlg()
115 {
116     QMessageBox * msg = 
117             new QMessageBox(QMessageBox::Information,
118                             "退出", "你已经放弃咯");
119     msg->show();
120 }