Qt 第二章创建对话框--快速设计对话框(2)

最新推荐文章于 2024-01-02 17:09:23 发布

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最新推荐文章于 2024-01-02 17:09:23 发布

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CC 4.0 BY-SA版权

原文链接：https://yq.aliyun.com/articles/436579

本文介绍了一个简单的Qt应用程序，该程序通过GoToCellDialog对话框让用户输入单元格位置，对话框验证输入并允许用户确认或取消操作。文章详细展示了如何使用QLabel、QLineEdit和QPushButton等组件创建定制化的对话框。

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gotocelldialog.h头文件

#ifndef GOTOCELLDIALOG_H
#define GOTOCELLDIALOG_H

#include <QDialog>

class QLabel;
class QLineEdit;
class QPushButton;

class GoToCellDialog:public QDialog
{
Q_OBJECT

public:
GoToCellDialog(QDialog *parent =0);

private slots:
void on_lineEdit_textChanged();

private:
QLabel *label;
QLineEdit *lineEdit;
QPushButton *okButton;
QPushButton *cancelButton;

};

#endif

gotocelldialog.cpp源文件

#include <QtGui>
#include "gotocelldialog.h"

GoToCellDialog::GoToCellDialog(QDialog *parent)
:QDialog(parent)
{
label = new QLabel(tr("&Cell Location"));
lineEdit = new QLineEdit;
label->setBuddy(lineEdit);

okButton = new QPushButton(tr("OK"));
okButton->setEnabled(false);
okButton->setDefault(true);

cancelButton = new QPushButton(tr("Cancel"));

QHBoxLayout *topLayout = new QHBoxLayout;
topLayout->addWidget(label);
topLayout->addWidget(lineEdit);

QHBoxLayout *lowerLayout = new QHBoxLayout;
lowerLayout->addStretch();
lowerLayout->addWidget(okButton);
lowerLayout->addWidget(cancelButton);

QVBoxLayout *mainLayout = new QVBoxLayout;
mainLayout->addLayout(topLayout);
mainLayout->addLayout(lowerLayout);

setLayout(mainLayout);
setWindowTitle(tr("Go to Cell"));
setFixedHeight(sizeHint().height());

QRegExp regExp("[A-Za-z][1-9][0-9]{0,2}");
lineEdit->setValidator(new QRegExpValidator(regExp,this));

connect(okButton,SIGNAL(clicked()),this,SLOT(accept()));
connect(cancelButton,SIGNAL(clicked()),this,SLOT(reject()));
connect(lineEdit,SIGNAL(textChanged(const QString &)),this,SLOT(on_lineEdit_textChanged()));
}

void GoToCellDialog::on_lineEdit_textChanged()
{
okButton->setEnabled(lineEdit->hasAcceptableInput());
}

main.cpp头文件

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

int main(int argc,char *argv[])
{
QApplication app(argc,argv);
GoToCellDialog dialog;
dialog.show();
return app.exec();

}

本文转自 chen138 51CTO博客，原文链接：http://blog.51cto.com/chenboqiang/316718，如需转载请自行联系原作者